Health Technology Research Synopsis
122nd Issue Date 10FEB2012
Compiled By Ralph Turchiano
Editors Top Five:
1. Honey could be effective at treating and preventing wound infections
2. A silver bullet to beat cancer?
3. Lower levels of sunlight link to allergy and eczema
4. Pneumonia wonder drug: Zinc saves lives
5. Study to determine whether fish oil can help prevent psychiatric disorders
In This Issue:
1. A glass of milk a day could benefit your brain
2. Biological time-keeper linked to diabetes
3. Honey could be effective at treating and preventing wound infections
4. Women taking indigestion drugs at increased risk of hip fracture after menopause
5. Are diet soft drinks bad for you?
6. Societal control of sugar essential to ease public health burden
7. Need an excuse to get a massage? Study shows it reduces inflammation following strenuous exercise
8. Decaffeinated coffee preserves memory function by improving brain energy metabolism
9. How antipsychotic medications cause metabolic side effects such as obesity and diabetes
10. Potatoes lower blood pressure in people with obesity and hypertension without increasing weight
11. Vigorous exercise linked to gene activity in prostate
12. Young children exposed to anesthesia multiple times show elevated rates of ADHD
13. Websites advertising cholesterol-lowering drugs of poor quality
14. A silver bullet to beat cancer?
15. EARTH: Dangerous dust
16. Coffee consumption reduces fibrosis risk in those with fatty liver disease
17. Breastfeeding and lung function at school age: Does maternal asthma modify the effect?
18. Lower levels of sunlight link to allergy and eczema
19. Vitamin D deficiency in geriatric patients
20. Regular use of vitamin and mineral supplements could reduce the risk of colon cancer
21. Administration of meningococcal vaccine with other routine infant vaccines appears effective
22. Pneumonia wonder drug: Zinc saves lives
23. Vitamin D deficiency high among trauma patients
24. Drinking large amounts of soft drinks associated with asthma and COPD
25. Fasting weakens cancer in mice
26. Halting bone-building osteoporosis drug use cuts risk for additional atypical femur fracture in half
27. NIH study links high levels of cadmium, lead in blood to pregnancy delay
28. Antidepressant use linked with less patient satisfaction after hip replacement
29. Study to determine whether fish oil can help prevent psychiatric disorders
30. Scientists sound alarm over threat of untreatable gonorrhea in United States
31. Seizures in patients with pork tapeworm caused by Substance P
32. Obesity is associated with altered brain function
33. U.S. workers are ‘giving away the store,’ costing firms billions
34. Phosphate additives pose a risk to health
35. Curry spice component may help slow prostate tumor growth
A glass of milk a day could benefit your brain
New research finds milk drinkers scored better on memory and brain function tests
Pouring at least one glass of milk each day could not only boost your intake of much-needed key nutrients, but it could also positively impact your brain and mental performance, according to a recent study in the International Dairy Journal.1 Researchers found that adults with higher intakes of milk and milk products scored significantly higher on memory and other brain function tests than those who drank little to no milk. Milk drinkers were five times less likely to “fail” the test, compared to non milk drinkers.
Researchers at the University of Maine put more than 900 men and women ages 23 to 98 through a series of brain tests – including visual-spatial, verbal and working memory tests – and tracked the milk consumption habits of the participants. In the series of eight different measures of mental performance, regardless of age and through all tests, those who drank at least one glass of milk each day had an advantage. The highest scores for all eight outcomes were observed for those with the highest intakes of milk and milk products compared to those with low and infrequent milk intakes. The benefits persisted even after controlling for other factors that can affect brain health, including cardiovascular health and other lifestyle and diet factors. In fact, milk drinkers tended to have healthier diets overall, but there was something about milk intake specifically that offered the brain health advantage, according to the researchers.
In addition to the many established health benefits of milk from bone health to cardiovascular health, the potential to stave off mental decline may represent a novel benefit with great potential to impact the aging population. While more research is needed, the scientists suggest some of milk’s nutrients may have a direct effect on brain function and that “easily implemented lifestyle changes that individuals can make present an opportunity to slow or prevent neuropsychological dysfunction.”
New and emerging brain health benefits are just one more reason to start each day with lowfat or fat free milk. Whether in a latte, in a smoothie, on your favorite cereal, or straight from the glass, milk at breakfast can be a key part of a healthy breakfast that help sets you up for a successful day. The 2010 Dietary Guidelines for Americans recommend three glasses of lowfat or fat free milk daily for adults and each 8-ounce glass contains nine essential nutrients Americans need, including calcium and vitamin D.
Biological time-keeper linked to diabetes
Researchers in Lille and Paris demonstrated that mutations in the melatonin receptor gene (melatonin or the “hormone of darkness” induces sleep) lead to an almost sevenfold increase in the risk of developing diabetes. This research, which was published in Nature Genetics on 29 January 2012, could contributed to the development of new drugs for the treatment or prevention of this metabolic disease.
Type 2 diabetes is characterised by excess blood glucose and increased resistance to insulin. It is the most common form of the disease and affects 300 million people in the world, including 3 million in France. This figure should double in the next few years, driven by the obesity epidemic and the disappearance of ancestral lifestyles. It is known that genetic factors, combined with a high-fat, high-sugar diet and lack of exercise, can also contribute to the onset of the disease. Furthermore, several studies have shown that sleeping disorders that affect the duration and quality of sleep are also high risk factors. Shift workers, for example, are at greater risk of developing the disease. No previous research has described any mechanism linking the biological clock to diabetes.
The researchers focused their attention on the receptor of a hormone called melatonin, which is produced by the pineal gland as light fades. Melatonin, also known as the hormone of darkness, can be seen as a biological “time-keeper”, synchronising biological rhythms with nightfall. The teams sequenced the MT2 gene, which encodes its receptor, in 7600 diabetics and persons with normal glycaemia. They found 40 rare mutations that modify the protein structure of the melatonin receptor, 14 of which made the receptor in question non-functional. The team went on to demonstrate that the risk of developing diabetes is nearly seven times higher in people affected by such mutations, which make them melatonin-insensitive.
It is known that the production of insulin, the hormone responsible for controlling blood glucose levels, drops at night to prevent any risk of hypoglycaemia. Insulin production starts up again, however, to avoid excess blood glucose during the day, which is when most people eat.
This study could lead to new drugs aimed at preventing or treating diabetes. Researchers could, for example, adjust MT2 receptor activity to control the metabolic pathways associated with it . The work also highlights the importance of genome sequencing as a means of personalising treatment for diabetic patients. There are many genetic causes for diabetes and the therapeutic approach needs to be adapted to the metabolic pathways concerned by each patient’s particular disorder.
Honey could be effective at treating and preventing wound infections
Manuka honey could help clear chronic wound infections and even prevent them from developing in the first place, according to a new study published in Microbiology. The findings provide further evidence for the clinical use of manuka honey to treat bacterial infections in the face of growing antibiotic resistance.
Streptococcus pyogenes is a normal skin bacterium that is frequently associated with chronic (non-healing) wounds. Bacteria that infect wounds can clump together forming ‘biofilms’, which form a barrier to drugs and promotes chronic infection. Researchers at Cardiff Metropolitan University have shown that manuka honey can not only destroy fully-formed S. pyogenes biofilms in vitro but also prevent the bacteria initially binding to components of wound tissue.
Honey has long been acknowledged for its antimicrobial properties. Traditional remedies containing honey were used in the topical treatment of wounds by diverse ancient civilisations. Manuka honey is derived from nectar collected by honey bees foraging on the manuka tree found growing in New Zealand and parts of Australia. It is included in modern licensed wound-care products around the world. Manuka honey has been reported to inhibit more than 80 species of bacteria, yet the antimicrobial properties of honey have not yet been fully exploited by modern medicine as its mechanisms of action are not fully understood.
Wounds that are infected with S. pyogenes often fail to respond to treatment. This is largely due to the development of biofilms which may be difficult for antibiotics to penetrate – in addition to problems of antibiotic resistance. The results of the study showed that very small concentrations of honey prevented the start of biofilm development and that treating established biofilms grown in Petri dishes with honey for 2 hours killed up to 85% of bacteria within them.
The Cardiff team are working towards providing molecular explanations for the antibacterial action of honey. The latest study reveals that honey can disrupt the interaction between S. pyogenes and the human protein fibronectin, which is displayed on the surface of damaged cells. “Molecules on the surface of the bacteria latch onto human fibronectin, anchoring the bacteria to the cell. This allows infection to proceed and biofilms to develop,” explained Dr Sarah Maddocks who led the study. “We found that honey reduced the expression of these bacterial surface proteins, inhibiting binding to human fibronectin, therefore making biofilm formation less likely. This is a feasible mechanism by which manuka honey minimizes the initiation of acute wound infections and also the establishment of chronic infections.
Ongoing work in Dr Maddocks’ lab is investigating other wound-associated bacteria including Pseudomonas aeruginosa and meticillin-resistant Staphylococcus aureus (MRSA). Manuka honey has also been shown to be effective at killing these bacteria. “There is an urgent need to find innovative and effective ways of controlling wound infections that are unlikely to contribute to increased antimicrobial resistance. No instances of honey-resistant bacteria have been reported to date, or seem likely,” said Dr Maddocks. “Applying antibacterial agents directly to the skin to clear bacteria from wounds is cheaper than systemic antibiotics and may well complement antibiotic therapy in the future. This is significant as chronic wounds account for up to 4% of health care expenses in the developed world.”
Women taking indigestion drugs at increased risk of hip fracture after menopause
Research: A prospective study of proton pump inhibitor use and risk of hip fracture in relation to dietary and lifestyle factors
Post-menopausal women are 35% more likely to suffer hip fracture if they take indigestion drugs, known as proton pump inhibitors (PPIs), a figure which increases to 50% if they are also current or former smokers, suggests a study published today on bmj.com.
PPIs are one of the most common medicines used worldwide and are often used to treat heartburn and acid reflex. They can, however, inhibit the absorption of calcium, which leads to the increased risk of fractures.
Authors from the Massachusetts General Hospital have looked at the association between PPIs and hip fractures in just under 80,000 post-menopausal women over an eight year period from 2000 to 2008. They suggest that women with a prolonged use of these drugs and who smoke could be up to 50% more likely to suffer from hip fractures compared to women who do not smoke or take these drugs.
Several studies have already been carried out in response to the growing concerns between the long-term use of PPIs and the risk of hip fractures, but these studies have been met with significant limitations. In May 2010, the Food and Drug Administration issued a warning of hip fractures and taking PPIs, but concluded that more data was needed for a full analysis.
Several factors including menopausal status, body weight, time spent carrying out physical activity, smoking status, alcohol consumption and calcium supplement usage were all taken into account. Calcium intake from food included in each participant’s diet was also analysed. Low and moderate traumas relating to fracture (including falling on ice, falling off a chair) were recorded, whereas high traumas (including skiing accidents or falling down the stairs) were not included.
Results show that out of 79,899 post-menopausal women, there were 893 hip fractures in total over an eight year period, concluding that post-menopausal women were at a 35% increased risk. In absolute numbers, the risk of hip fracture among regular users of PPIs was 2.02 events per 1000 person years, compared with 1.51 events per 1000 person years among non-users of the drugs (a “person year” is the number of years of follow up multiplied by the number of people in the study).Women who were also current or former smokers were at an even higher risk of 50%. Correlation was also found between the length of time PPIs were taken and the risk of fractures.
Figures show that 6.7% of women were regularly using a PPI in 2000 which increased to 18.9% in 2008, which poses an increased risk of fractures associated with PPIs in the coming years. Because of this, the Food and Drug Administration wish to revise labelling on these drugs and the authors stress the importance of evaluating the need for long-term use of PPIs among those with a history of smoking. Finally, it was noted that the risk of hip fracture returned to a normal level two years after patients stopped taking PPIs.
Are diet soft drinks bad for you?
New study finds potential link between daily consumption of diet soft drinks and risk of vascular events
Individuals who drink diet soft drinks on a daily basis may be at increased risk of suffering vascular events such as stroke, heart attack, and vascular death. This is according to a new study by Hannah Gardener and her colleagues from the University of Miami Miller School of Medicine and at Columbia University Medical Center. However, in contrast, they found that regular soft drink consumption and a more moderate intake of diet soft drinks do not appear to be linked to a higher risk of vascular events. The research¹ appears online in the Journal of General Internal Medicine², published by Springer.
In the current climate of escalating obesity rates, artificially sweetened soft drinks are marketed as healthier alternatives to sugar-sweetened beverages, due to their lack of calories. However, the long-term health consequences of drinking diet soft drinks remain unclear.
Gardener and team examined the relationship between both diet and regular soft drink consumption and risk of stroke, myocardial infarction (or heart attack), and vascular death. Data were analyzed from 2,564 participants in the NIH-funded Northern Manhattan Study, which was designed to determine stroke incidence, risk factors and prognosis in a multi-ethnic urban population. The researchers looked at how often individuals drank soft drinks – diet and regular – and the number of vascular events that occurred over a ten-year period.
They found that those who drank diet soft drinks daily were 43 percent more likely to have suffered a vascular event than those who drank none, after taking into account pre-existing vascular conditions such as metabolic syndrome, diabetes and high blood pressure. Light diet soft drink users, i.e. those who drank between one a month and six a week, and those who chose regular soft drinks were not more likely to suffer vascular events.
Gardener concludes: “Our results suggest a potential association between daily diet soft drink consumption and vascular outcomes. However, the mechanisms by which soft drinks may affect vascular events are unclear. There is a need for further research before any conclusions can be drawn regarding the potential health consequences of diet soft drink consumption.”
1. Gardener H et al (2012). Diet soft drink consumption is associated with an increased risk of vascular events in the Northern Manhattan Study. Journal of General Internal Medicine. DOI 10.1007/s11606-011-1968-2
2. The Journal of General Internal Medicine is the official journal of the Society of General Internal Medicine.
Societal control of sugar essential to ease public health burden
Sugar should be controlled like alcohol and tobacco to protect public health, according to a team of UCSF researchers, who maintain in a new report that sugar is fueling a global obesity pandemic, contributing to 35 million deaths annually worldwide from non-communicable diseases like diabetes, heart disease and cancer.
Non-communicable diseases now pose a greater health burden worldwide than infectious diseases, according to the United Nations. In the United States, 75 percent of health care dollars are spent treating these diseases and their associated disabilities.
In the Feb. 2 issue of Nature, Robert Lustig MD, Laura Schmidt PhD, MSW, MPH, and Claire Brindis, DPH, colleagues at the University of California, San Francisco (UCSF), argue that sugar’s potential for abuse, coupled with its toxicity and pervasiveness in the Western diet make it a primary culprit of this worldwide health crisis.
This partnership of scientists trained in endocrinology, sociology and public health took a new look at the accumulating scientific evidence on sugar. Such interdisciplinary liaisons underscore the power of academic health sciences institutions like UCSF.
Sugar, they argue, is far from just “empty calories” that make people fat. At the levels consumed by most Americans, sugar changes metabolism, raises blood pressure, critically alters the signaling of hormones and causes significant damage to the liver – the least understood of sugar’s damages. These health hazards largely mirror the effects of drinking too much alcohol, which they point out in their commentary is the distillation of sugar.
Worldwide consumption of sugar has tripled during the past 50 years and is viewed as a key cause of the obesity epidemic. But obesity, Lustig, Schmidt and Brindis argue, may just be a marker for the damage caused by the toxic effects of too much sugar. This would help explain why 40 percent of people with metabolic syndrome—the key metabolic changes that lead to diabetes, heart disease and cancer—are not clinically obese.
“As long as the public thinks that sugar is just ’empty calories,’ we have no chance in solving this,” said Lustig, a professor of pediatrics, in the division of endocrinology at the UCSF Benioff Children’s Hospital and director of the Weight Assessment for Teen and Child Health (WATCH) Program at UCSF.
“There are good calories and bad calories, just as there are good fats and bad fats, good amino acids and bad amino acids, good carbohydrates and bad carbohydrates,” Lustig said. “But sugar is toxic beyond its calories.”
|IMAGE:This is Claire Brindis, M.D.|
Limiting the consumption of sugar has challenges beyond educating people about its potential toxicity. “We recognize that there are cultural and celebratory aspects of sugar,” said Brindis, director of UCSF’s Philip R. Lee Institute for Health Policy Studies. “Changing these patterns is very complicated”
According to Brindis, effective interventions can’t rely solely on individual change, but instead on environmental and community-wide solutions, similar to what has occurred with alcohol and tobacco, that increase the likelihood of success.
The authors argue for society to shift away from high sugar consumption, the public must be better informed about the emerging science on sugar.
“There is an enormous gap between what we know from science and what we practice in reality,” said Schmidt, professor of health policy at UCSF’s Philip R. Lee Institute for Health Policy Studies (IHPS) and co-chair of UCSF’s Clinical and Translational Science Institute’s (CTSI) Community Engagement and Health Policy Program, which focuses on alcohol and addiction research.
“In order to move the health needle, this issue needs to be recognized as a fundamental concern at the global level,” she said.
The paper was made possible with funding from UCSF’s Clinical and Translational Science Institute, UCSF’s National Institutes of Health-funded program that helps accelerate clinical and translational research through interdisciplinary, interprofessional and transdisciplinary work.
Many of the interventions that have reduced alcohol and tobacco consumption can be models for addressing the sugar problem, such as levying special sales taxes, controlling access, and tightening licensing requirements on vending machines and snack bars that sell high sugar products in schools and workplaces.
“We’re not talking prohibition,” Schmidt said. “We’re not advocating a major imposition of the government into people’s lives. We’re talking about gentle ways to make sugar consumption slightly less convenient, thereby moving people away from the concentrated dose. What we want is to actually increase people’s choices by making foods that aren’t loaded with sugar comparatively easier and cheaper to get.”
Need an excuse to get a massage? Study shows it reduces inflammation following strenuous exercise
Genetic analysis also shows massage promotes growth of new mitochondria
Most athletes can testify to the pain-relieving, recovery-promoting effects of massage. Now there’s a scientific basis that supports booking a session with a massage therapist: On the cellular level massage reduces inflammation and promotes the growth of new mitochondria in skeletal muscle. The research, involving scientists from the Buck Institute for Research on Aging and McMaster University in Hamilton Ontario appears in the February 1st online edition of Science Translational Medicine.
The study involved the genetic analysis of muscle biopsies taken from the quadriceps of eleven young males after they had exercised to exhaustion on a stationary bicycle. One of their legs was randomly chosen to be massaged. Biopsies were taken from both legs prior to the exercise, immediately after 10 minutes of massage treatment and after a 2.5 hour period of recovery.
Buck Institute faculty Simon Melov, PhD, was responsible for the genetic analysis of the tissue samples. “Our research showed that massage dampened the expression of inflammatory cytokines in the muscle cells and promoted biogenesis of mitochondria, which are the energy-producing units in the cells,” said Melov. He added that the pain reduction associated with massage may involve the same mechanism as those targeted by conventional anti-inflammatory drugs. “There’s general agreement that massage feels good, now we have a scientific basis for the experience,” said Melov.
Study participants were recruited at McMaster University in Hamilton, Ontario, Canada. Lead author Mark Tarnopolsky, MD, PhD, from the Department of Pediatrics and Medicine said the research provides much needed validation for a practice that is growing in popularity. “The potential benefits of massage could be useful to a broad spectrum of individuals including the elderly, those suffering from musculoskeletal injuries and patients with chronic inflammatory disease,” said Tarnopolsky. “This study provides evidence that manipulative therapies, such as massage, may be justifiable in medical practice.”
About 18 million individuals undergo massage therapy annually in the U.S., making it the fifth most widely used form of complementary and alternative medicine. Despite several reports that long-term massage therapy reduces chronic pain and improves range of motion in clinical trials, the biological effects of massage on skeletal tissue have remained unclear.
Decaffeinated coffee preserves memory function by improving brain energy metabolism
Researchers from Mount Sinai School of Medicine have discovered that decaffeinated coffee may improve brain energy metabolism associated with type 2 diabetes. This brain dysfunction is a known risk factor for dementia and other neurodegenerative disorders like Alzheimer’s disease. The research is published online in Nutritional Neuroscience.
A research group led by Giulio Maria Pasinetti, MD, PhD, Professor of Neurology, and Psychiatry, at Mount Sinai School of Medicine, explored whether dietary supplementation with a standardized decaffeinated coffee preparation prior to diabetes onset might improve insulin resistance and glucose utilization in mice with diet-induced type 2 diabetes. The researchers administered the supplement for five months, and evaluated the brain’s genetic response in the mice. They found that the brain was able to more effectively metabolize glucose and use it for cellular energy in the brain. Glucose utilization in the brain is reduced in people with type 2 diabetes, which can often result in neurocognitive problems.
“Impaired energy metabolism in the brain is known to be tightly correlated with cognitive decline during aging and in subjects at high risk for developing neurodegenerative disorders,” said Dr. Pasinetti. “This is the first evidence showing the potential benefits of decaffeinated coffee preparations for both preventing and treating cognitive decline caused by type 2 diabetes, aging, and/or neurodegenerative disorders.”
Coffee intake is not recommended for everybody due to the fact that it is associated with cardiovascular health risks such as elevated blood cholesterol and blood pressure, both of which lead to an increased risk for heart disease, stroke, and premature death. These negative effects have primarily been attributed to the high caffeine content of coffee. Nonetheless, these novel findings are evidence that some of the non-caffeine components in coffee provide health benefits in mice. Dr. Pasinetti hopes to explore the preventive role of decaffeinated coffee delivered as a dietary supplement in humans.
“In light of recent evidence suggesting that cognitive impairment associated with Alzheimer’s disease and other age-related neurodegenerative disorders may be traced back to neuropathological conditions initiated several decades before disease onset, developing preventive treatments for such disorders is critical,” he said.
How antipsychotic medications cause metabolic side effects such as obesity and diabetes
Sanford-Burnham study suggests that many antipsychotics affect metabolism because they activate the TGFbeta pathway — a finding that could lead to safer therapeutics for bipolar disorder and schizophrenia patients
|IMAGE:This is Fred Levine, M.D., Ph.D., director of the Sanford Children’s Health Research Center at Sanford-Burnham.|
LA JOLLA, Calif. — In 2008, roughly 14.3 million Americans were taking antipsychotics—typically prescribed for bipolar disorder, schizophrenia, or a number of other behavioral disorders—making them among the most prescribed drugs in the U.S. Almost all of these medications are known to cause the metabolic side effects of obesity and diabetes, leaving patients with a difficult choice between improving their mental health and damaging their physical health. In a paper published January 31 in the journal Molecular Psychiatry, researchers at Sanford-Burnham Medical Research Institute (Sanford-Burnham) reveal how antipsychotic drugs interfere with normal metabolism by activating a protein called SMAD3, an important part of the transforming growth factor beta (TGFbeta) pathway.
The TGFbeta pathway is a cellular mechanism that regulates many biological processes, including cell growth, inflammation, and insulin signaling. In this study, all antipsychotics that cause metabolic side effects activated SMAD3, while antipsychotics free from these side effects did not. What’s more, SMAD3 activation by antipsychotics was completely independent from their neurological effects, raising the possibility that antipsychotics could be designed that retain beneficial therapeutic effects in the brain, but lack the negative metabolic side effects.
“We now believe that many antipsychotics cause obesity and diabetes because they trigger the TGFbeta pathway. Of all the drugs we tested, the only two that didn’t activate the pathway were the ones that are known not to cause metabolic side effects,” said Fred Levine, M.D., Ph.D., director of the Sanford Children’s Health Research Center at Sanford-Burnham and senior author of the study.
In a previous study aimed at developing new insights into diabetes, Dr. Levine and his team used Sanford-Burnham’s high-throughput screening capabilities to search a collection of known drugs for those that alter the body’s ability to generate insulin, the pancreatic hormone that helps regulate glucose. That’s when they first noticed that many antipsychotics alter the activity of the insulin gene. In this current study, the researchers set out to connect the dots between antipsychotics and insulin. In doing so, experiments in laboratory cell-lines showed that antipsychotics known to cause metabolic side effects also activated the TGFbeta pathway—a mechanism that controls many cellular functions, including the production of insulin—while the drugs without these side effects did not.
Wondering whether their initial laboratory observations were relevant to the human experience, the researchers reanalyzed previously published gene expression patterns in brain tissue from schizophrenic patients treated with antipsychotics. What they found supported their earlier findings—TGFbeta signaling was activated only in those patients receiving antipsychotic treatment. Looking further, they found that the extent to which each antipsychotic drug activated the TGFbeta pathway in human brains correlated very closely with the extent to which those same drugs activated SMAD3 and affected the insulin promoter in their cell culture experiments.
The TGFbeta pathway also plays an important role in metabolic disease in people who don’t take antipsychotic medications. “It’s known that people who have elevated TGFbeta levels are more prone to diabetes. So having a dysregulated TGFbeta pathway—whether caused by antipsychotics or through some other mechanism—is clearly a very bad thing,” said Dr. Levine. “The fact that antipsychotics activate this pathway should be a big concern to pharmaceutical companies. We hope this new information will lead to the development of improved drugs.”
Potatoes lower blood pressure in people with obesity and hypertension without increasing weight
Journal of Agricultural and Food Chemistry
The first study to check the effects of eating potatoes on blood pressure in humans has concluded that two small helpings of purple potatoes (Purple Majesty) a day decreases blood pressure by about 4 percent without causing weight gain. In a report in the ACS’ Journal of Agricultural and Food Chemistry, the researchers say that decrease, although seemingly small, is sufficient to potentially reduce the risk of several forms of heart disease.
Joe Vinson and colleagues point out that people in the U.S. eat more potatoes than any other vegetable. Purple-skinned potatoes, a boutique variety increasingly available in food stores, are noted for having high levels of healthful antioxidant compounds. And in Korea, purple potatoes are renowned in folk medicine as a way to lose weight. Vinson’s team thus decided to investigate the effects of eating 6-8 small microwaved purple potatoes twice a day on 18 volunteers, most of whom were overweight with high blood pressure. The volunteers ate potatoes or no potatoes for four weeks, and then switched to the opposite regimen for another four weeks while researchers monitored systolic and diastolic blood pressure (the higher and lower numbers in a blood pressure reading like 120/80), body weight and other health indicators.
Average diastolic blood pressure dropped by 4.3 percent and systolic pressure decreased by 3.5 percent. The majority of subjects took anti-hypertensive drugs and still had a reduction in blood pressure. None of the study participants gained weight. Vinson said that other studies have identified substances in potatoes with effects in the body similar to those of the well-known ACE-inhibitor medications, a mainstay for treating high blood pressure. But he suspects that the effects may be due to other substances in potatoes. The scientists do not know yet whether ordinary white potatoes have the same beneficial effects.
Vigorous exercise linked to gene activity in prostate
UCSF discovery sheds light on how robust exercise may lower the risk of prostate cancer progression
|IMAGE:This is June Chan, M.D.|
Scientists at the University of California, San Francisco (UCSF) have identified nearly 200 genes in the healthy prostate tissue of men with low-grade prostate cancer that may help explain how physical activity improves survival from the disease.
The study compared the activity of some 20,000 genes in healthy prostate tissue biopsied from several dozen patients.
The finding builds on two studies last year by UCSF and Harvard School of Public Health that showed brisk walking or vigorous exercise such as jogging for three or more hours a week was linked to a lowered risk of prostate cancer progression and death after diagnosis. Those earlier studies, however, offered no explanation as to why.
In the current work, to be presented Friday, February 3, 2012 at an American Society of Clinical Oncology (ASCO) meeting in San Francisco, the UCSF team teased out a molecular profile of 184 genes whose expression in the prostate gland is linked to vigorous exercise.
Understanding how the activity of these genes is impacted by vigorous exercise and how this might translate to a lowered risk of prostate cancer progression may help reveal new ways to manage the disease, said the senior author of the study, June Chan, ScD, the Steven and Christine Burd-Safeway Distinguished Professor at UCSF.
“Vigorous physical activity may provide clinical benefits for men diagnosed with earlier stage prostate cancer,” she said. “The finding suggests some interesting leads on mechanisms by which physical activity may protect against prostate cancer progression.”
Prostate cancer is one of the most commonly diagnosed cancers in the United States. More than 217,000 U.S. men are diagnosed with the disease, and some 32,000 men die from prostate cancer, each year, according to the National Cancer Institute.
The analysis involved examining the levels of expression, or activity, of the same 20,000 genes in 70 men. This information was correlated with the exercise patterns the men reported on questionnaires.
The study revealed 109 genes were “up-regulated,” or more active, and 75 were “down-regulated” or less active, among the men who exercised vigorously for at least three hours a week compared to those who exercised less. Among the genes that exhibited greater expression were a number that already are thought to help thwart cancer progression, including the well-known “tumor suppressor” genes BRCA1 and BRCA2, as well as genes involved in cell cycle and DNA repair. The authors are continuing to analyze the data, including investigating pathways that were down-regulated by vigorous physical activity.
The team plans to follow this small, preliminary study with an investigation in a larger population of men. In another future study, they plan to examine the effects of physical activity among men who already have experienced cancer recurrence. Further research on these genes, said Chan, may help to determine how exercise contributes to improved cancer survivorship, and suggest novel strategies for prevention.
Young children exposed to anesthesia multiple times show elevated rates of ADHD
Children exposed to two or more anesthetics before age 3 had more than double the incidence of ADHD than children who had no exposure, says David Warner, M.D., a Mayo Clinic pediatric anesthesiologist and investigator on the observational study.
The findings are published in the Feb. 2 edition of Mayo Clinic Proceedings.
When basic science studies in the medical literature began to suggest anesthesia used in surgery causes changes in the brains of young animals, Dr. Warner and a group of researchers at Mayo Clinic took note.
“Those studies piqued our interest,” Dr. Warner says. “We were skeptical that the findings in animals would correlate with kids, but it appears that it does.”
The study utilized results of an existing epidemiological study that looked at educational records of children born between 1976 and 1982 in Rochester, Minn., and determined those who developed some form of learning disability or ADHD.
Among 341 cases of ADHD in those younger than 19, researchers traced medical records in the Rochester Epidemiology Project, a decades-long database of all patient care in Olmsted County, Minn., looking for exposure to anesthesia and surgery before age 3.
Children who had no exposure to anesthesia and surgery had ADHD at a rate of 7.3 percent. The rate after a single exposure to anesthesia and surgery was approximately the same. For children who had two or more exposures to anesthesia and surgery, the rate of ADHD was 17.9 percent, even after researchers adjusted for other factors, including gestational age, sex, birth weight and comorbid health conditions.
The results of the study, however, do not definitively mean that anesthesia causes ADHD, Dr. Warner says.
“This is an observational study,” he says. “A wide range of other factors might be responsible for the higher frequency of ADHD in children with multiple exposures. The findings certainly do suggest that further investigation into this area is warranted, and investigators at Mayo Clinic and elsewhere are actively pursuing these studies.”
Websites advertising cholesterol-lowering drugs of poor quality
A new study published in the journal Pharmacoepidemiology & Drug Safety reveals that internet sites selling prescription statins directly to consumers are widespread, and that most websites advertising statins for sale to the general public contain very poor levels of information relevant to safe use of the medicine and side effects.
Researchers led by Professor David Brown, School of Pharmacy and Biomedical Sciences, University of Portsmouth, simulated a customer search and evaluation of 184 retrieved sites using evaluation tools focusing on quality and safe medicine use.
Results showed that a potential purchaser of statins is likely to encounter websites from a wide geographical base of generally poor quality.
General contraindications were absent in 92.4% of sites and contraindicated medicines were absent in 47.3%. Key warnings on the appearance of symptoms associated with myopathy, liver disease, hypersensitivity and pancreatitis were absent in 37, 48.4, 91.3, and 96.2% of sites respectively.
Most websites presented a chaotic and incomplete list of known side effects; just 13 (7.1%) presented a list compatible with current prescribing information. Only two thirds (65.8%) attempted to describe any side effects in lay language.
“Websites offering statins for sale contain little information on the safety of these drugs, which are intended as prescription only medicines” Brown notes. “There is an inherent danger in patients seeking to self-medicate in this way without consulting a healthcare professional and being appraised of ways to use the medicine safely.”
A silver bullet to beat cancer?
The internet is awash with stories of how silver can be used to treat cancer. Now, lab tests have shown that it is as effective as the leading chemotherapy drug – and may have fewer side-effects.
Results from the study at the University of Leeds, published in Dalton Transactions, show that particular silver compounds are as toxic to cancer cells as the platinum-based drug Cisplatin, which is widely used to treat a range of cancers.
But the crucial difference is that silver is thought to be much less toxic to healthy human cells, and in some cases, can be beneficial. Silver is currently used for its antiseptic and antibiotic properties, in bandages, wound dressings and water purification filters in the third world.
Nausea and vomiting, kidney damage and an increased risk of infection are common side effects of Cisplatin which is used to treat cancer of the lungs, breast, bladder, testicles, head and neck, ovaries and lymph nodes.
Dr Charlotte Willans who is leading the study said: “As many are unfortunately aware, chemotherapy can be a very gruelling experience for the patient. Finding effective, yet non-toxic drugs is an ongoing problem, but these preliminary results are an important step in solving it.”
“Our research has looked at the structure which surrounds a central silver atom. This ‘shrubbery’ is what determines how reactive it is and what it will interact with. Our research has used different types of these ligands to see which is the most effective against cancer cells,” adds Dr Willans.
The research, still the first phase of drug development, involved exposing breast and colon cancer cells with different silver-based chemicals for six day periods. It has been shown that ligands which are co-ordinately bonded to the central silver atom through two sites are more effective than those coordinated through only one site. This may be due to the release of silver being much slower and make these compounds more effective over a longer period of time.
A major barrier to the continued development of these compounds is a lack of understanding of how they work. Over the next 12 months, research will focus on investigating how the compounds damage cancerous cells and what effects they have on healthy cells. This will establish whether these silver complexes are in fact less toxic to ordinary human tissue, and will help to design and develop the next-generation of chemotherapy drugs. This work is been carried out in collaboration with Dr. Roger Phillips at the University of Bradford and is funded by Yorkshire Cancer Research.
EARTH: Dangerous dust
Alexandria, VA – What would you do if you found out that the roads you drive on could cause cancer? This is the reality that residents face in Dunn County, North Dakota. For roughly 30 years, gravel containing the potentially carcinogenic mineral erionite was spread on nearly 500 kilometers of roads, playgrounds, parking lots, and even flower beds throughout Dunn County.
Concerns about erionite were first unveiled in Central Anatolia, Turkey, where an epidemic of mesothelioma — a normally rare cancer of the smooth lining of the chest, lungs, heart and abdomen — was responsible for up to 50 percent of the deaths in some villages. Although it is found in 12 states, erionite remains an unregulated mineral in the U.S. because it has not been used commercially and was previously thought that, unlike asbestos, human exposure was extremely limited. However, new evidence of its prevalence and dangers is coming to light, and scientists are beginning to wonder whether we should be worried. Find out more at http://www.earthmagazine.org/article/dangerous-dust-erionite-asbestos-mineral-causing-cancer-epidemic-turkey-found-least-13.
Coffee consumption reduces fibrosis risk in those with fatty liver disease
Increased coffee intake significantly decreases risk in nonalcoholic steatohepatitis patients
Caffeine consumption has long been associated with decreased risk of liver disease and reduced fibrosis in patients with chronic liver disease. Now, newly published research confirms that coffee caffeine consumption reduces the risk of advanced fibrosis in those with nonalcoholic fatty liver disease (NAFLD). Findings published in the February issue of Hepatology, a journal of the American Association for the Study of Liver Diseases, show that increased coffee intake, specifically among patients with nonalcoholic steatohepatitis (NASH), decreases risk of hepatic fibrosis.
The steady increase in rates of diabetes, obesity, and metabolic syndrome over the past 20 years has given rise to greater prevalence of NAFLD. In fact, experts now believe NAFLD is the leading cause of chronic liver disease in the U.S., surpassing both hepatitis B and C. The majority of patients will have isolated fatty liver which has a very low likelihood of developing progressive liver disease. However, a subset of patients will have NASH, which is characterized by inflammation of the liver, destruction of liver cells, and possibly scarring of the liver. Progression to cirrhosis (advanced scarring of the liver) may occur in about 10-11% of NASH patients over a 15 year period, although this is highly variable.
To enhance understanding of the correlation between coffee consumption and the prevalence and severity of NAFLD, a team led by Dr. Stephen Harrison, Lieutenant Colonel, U.S. Army at Brooke Army Medical Center in Fort Sam Houston, Texas surveyed participants from a previous NAFLD study as well as NASH patients treated at the center’s hepatology clinic. The 306 participants were asked about caffeine coffee consumption and categorized into four groups: patients with no sign of fibrosis on ultrasound (control), steatosis, NASH stage 0-1, and NASH stage 2-4.
Researchers found that the average milligrams in total caffeine consumption per day in the control, steatosis, Nash 0-1, and Nash 2-4 groups was 307, 229, 351 and 252; average milligrams of coffee intake per day was 228, 160, 255, and 152, respectively. There was a significant difference in caffeine consumption between patients in the steatosis group compared to those with NASH stage 0-1. Coffee consumption was significantly greater for patients with NASH stage 0-1, with 58% of caffeine intake from regular coffee, than with NASH stage 2-4 patients at only 36% of caffeine consumption from regular coffee.
Multiple analyses showed a negative correlation between coffee consumption and risk of hepatic fibrosis. “Our study is the first to demonstrate a histopatholgic relationship between fatty liver disease and estimated coffee intake,” concludes Dr. Harrison. “Patients with NASH may benefit from moderate coffee consumption that decreases risk of advanced fibrosis. Further prospective research should examine the amount of coffee intake on clinical outcomes.”
Breastfeeding and lung function at school age: Does maternal asthma modify the effect?
Breastfeeding is associated with improved lung function at school age, particularly in children of asthmatic mothers, according to a new study from researchers in Switzerland and the UK.
“In our cohort of school age children, breastfeeding was associated with modest improvement in forced mid-expiratory flow (FEF50) in our whole group and with improvements in forced vital capacity (FVC) and forced expiratory volume at 1 second (FEV1) only in the children of asthmatic mothers,” said Claudia E. Kuehni, MD, MSc, professor at the Institute of Social and Preventive Medicine at the University of Bern. “In contrast, some earlier studies have suggested that breastfeeding might be harmful in the offspring of mothers with asthma.”
The findings were published online ahead of print publication in the American Thoracic Society’s American Journal of Respiratory and Critical Care Medicine.
The researchers analyzed data from a nested sample of 1458 children from the Leicestershire cohort studies, born between 1993 and 1997 in the UK. They assessed duration of breastfeeding, other exposures and respiratorysymptoms by repeated questionnaires. Post-bronchodilator FVC, FEV1, peak expiratory flow rates (PEF), FEF50 and skinprick tests were measured at age 12.
In the entire sample of children, FEF50was significantly higher in breastfed children compared with those who were not breastfed, increasing by 0.130 L/sec (P=.048) in those breastfed for 4-6 months and 0.164 L/sec (P=.041) in those breastfed for more than six months. These effects were larger among children of mothers with asthma, with increases of 0.375 L/sec (P=.015) in those breastfed for 4-6 months and 0.468 L/sec (P=.009) in those breastfed for more than six months. Significant improvements in FVC and FEV1with breastfeeding were seen only in the children of asthmatic mothers. Adjustments for respiratory infections in infancy and asthma and atopy in childhood did not change the results of these analyses.
The study had several limitations, including a modest response rate of the original cohort for laboratory examinations and the use of self-report for determining duration of breastfeeding, maternal asthma and infections during infancy.
“We observed modest improvements in lung function in breastfed children in our cohort, including the children of mothers with asthma. Furthermore, our data suggest that rather than acting by reducing respiratory infections, asthma or allergy, breastfeeding might have a direct effect on lung growth,” said Dr. Kuehni. “This study supports a strong recommendation for breastfeeding in all children, including those with asthmatic mothers.”
Lower levels of sunlight link to allergy and eczema
Sunshine may help to prevent allergies and eczema
Increased exposure to sunlight may reduce the risk of both food allergies and eczema in children, according to a new scientific study published this week.
Researchers from the European Centre for Environment & Human Health, along with several Australian institutions, have found that children living in areas with lower levels of sunlight are at greater risk of developing food allergies and the skin condition eczema, compared to those in areas with higher UV.
The research team used data from a study of Australian children and analysed how rates of food allergy, eczema and asthma varied throughout the country. As well as finding a link between latitude and allergies to peanut and egg, the results showed that on average children in the south of the country are twice as likely to develop eczema as those in the north.
The report builds upon existing evidence that suggests exposure to the sun may play a role in rising levels of food allergy and eczema. Sunlight is important because it provides our body with the fuel to create vitamin D in the skin, and locations closer to the equator typically receive higher levels of sunshine. Australia is a particularly good place for this type of study as it spans nearly 3000 miles from north to south, with a large variation in climate, day length and sun strength – from Queensland in the north to Tasmania in the south.
Dr Nick Osborne, who led the research, believes these findings provide us with an important insight into the prevalence of food allergies and eczema, which appear to be on the increase. Dr Osborne also cautioned that exposure to sunlight can vary for a host of reasons beyond latitude, such as local climate variations and behaviours, and these factors will also need to be considered.
He said “This investigation has further underlined the association between food allergies, eczema and where you live. We’re now hoping to study these effects at a much finer scale and examine which factors such as temperature, infectious disease or vitamin D are the main drivers of this relationship. As always, care has to be taken we are not exposed to too much sunlight, increasing the risk of skin cancer.”
Vitamin D deficiency in geriatric patients
The great majority of geriatric patients in a German rehabilitation hospital were found to have vitamin D deficiency. Stefan Schilling presents his study results in this week’s issue of Deutsches Ärzteblatt International (Dtsch Arztebl Int 2012; 109: 33-8).
In order to establish the vitamin D status in geriatric patients in Germany, the researchers measured 25-OH vitamin D in 1578 patients in the geriatric rehabilitation hospital in Trier after they had been examined on admission.
Insufficiently high concentrations were found in 89% of patients, and 67% had severe vitamin D deficiency. Vitamin D affects the calcium and bone metabolism, and it is also attributed with numerous other effects. A sufficiently high concentration of vitamin D, and its effects on the muscles, seems to help reduce the risk of falls and thus of fractures.
Older people seek exposure to the sun less often than young people; the risk of skin cancer is another reason for restricting sun exposure. In contrast to the fluctuations in vitamin D levels between the summer and winter halves of the year that is observed in young people, the old patients in this study (average age 82) did not display any seasonal fluctuations.
According to the recommendations of the Institute of Medicine, daily supplementation with 800 IU of vitamin D is therefore advisable in people older than 70.
Regular use of vitamin and mineral supplements could reduce the risk of colon cancer
Ottawa, Ontario –Could the use of vitamin and mineral supplements in a regular diet help to reduce the risk of colon cancer and protect against carcinogens? A study published in the Canadian Journal of Physiology and Pharmacology (CJPP) found that rats given regular multivitamin and mineral supplements showed a significantly lower risk of developing colon cancer when they were exposed to carcinogens.
“It has been unclear whether multivitamin supplementation to cancer patients is helpful, has no effect, or is even detrimental during therapy,” commented Dr. Grant Pierce, Editor of CJPP. “This study is important because it gives some direction to cancer patients in desperate need of guidance on the value of multivitamins and minerals administered during cancer.”
The authors studied rats that were fed a high-fat diet (20% fat) over a 32 week period. The rats were divided into 6 groups, which were exposed to different combinations of supplements and carcinogens; the colon carcinogenisis induced in the study rats has characteristics that mimic human colon cancer. Rats fed a high-fat plus low-fibre diet and exposed to carcinogens developed pre-cancerous lesions; whereas, rats undergoing similar treatment, but provided with daily multivitamin and mineral supplements, showed a significant (84%) reduction in the formation of pre-cancerous lesions and did not develop tumours.
The authors conclude that “multivitamin and mineral supplements synergistically contribute to the cancer chemopreventative potential, and hence, regular supplements of multivitamins and minerals could reduce the risk of colon cancer.”
The study “Multivitamin and mineral supplementation in 1,2-dimethylhydrazine induced experimental colon carcinogenesis and evaluation of free radical status, antioxidant potential, and incidence of ACF” appears in the January issue of CJPP.
IMMUNOLOGY: How a stomach-colonizing bacterium protects against asthma
The bacterium Helicobacter pylori can be found colonizing the stomach lining of almost half the world’s population. Although persistent infection with Helicobacter pylori increases an individual’s risk of developing stomach cancer, it also decreases their risk of developing asthma. A team of researchers led by Anne Müller, at the University of Zürich, Switzerland, has now identified a cellular mechanism by which persistent infection with Helicobacter pylori protects mice from developing allergic asthma. Specifically, they found that Helicobacter pylori modulated immune cells known as dendritic cells such that they did not activate an aggressive immune response but instead activated what is known as a tolerogenic immune response. Although this tolerogenic immune response enabled Helicobacter pylori to persist, it also prevented the onset of unwanted immune responses to allergens (that is, it protected against allergic asthma).
As noted by Kouji Matsushima and Shigenori Nagai, in an accompanying commentary, these data provide new mechanistic insight into the intriguing link between the recent sharp rise in the industrialized world in the number of people with asthma and the simultaneous decrease in exposure to microbes, including Helicobacter pylori.
TITLE: DC-derived IL-18 drives Treg differentiation, murine Helicobacter pylori–specific immune tolerance, and asthma protection
Administration of meningococcal vaccine with other routine infant vaccines appears effective
CHICAGO – Administration of routine infant immunizations with a vaccine for serogroup B Neisseria meningitidis, a bacterium that is a cause of serious disease such as sepsis and meningitis, was effective against meningococcal strains and produced minimal interference with the response to the routine vaccinations, according to a study in the February 8 issue of JAMA.
Certain serogroup B Neisseria meningitidis (MenB) vaccines proved effective in clinical trials and controlled a clonal MenB outbreak in New Zealand; however, the high strain specificity of these vaccines limited their usefulness, especially in infants and young children, according to background information in the article.
Nicoletta Gossger, M.D., of the University of Oxford, United Kingdom, and colleagues assessed the immunogenicity (the ability to produce an immune response) and reactogenicity (producing adverse reactions) of a vaccine developed to provide broader protection, a multicomponent serogroup B meningococcal vaccine (4CMenB), in a large group of infants, given in 2 different schedules, with or separately from routine vaccines. The multicenter, randomized controlled study included 1,885 infants enrolled at age 2 months from August 2008 to July 2010 in Europe. Participants were randomized to receive (1) 4CMenB at 2, 4, and 6 months with routine vaccines (7-valent pneumococcal and combined diphtheria, tetanus, acellular pertussis, inactivated polio, hepatitis B, Haemophilus influenzae type b vaccines); (2) 4CMenB at 2, 4, and 6 months and routine vaccines at 3, 5, and 7 months; (3) 4CMenB with routine vaccines at 2, 3, and 4 months; or (4) routine vaccines alone at 2, 3, and 4 months. The primary outcome the researchers measured was the percentage of participants with human complement serum bactericidal activity (hSBA) titer (concentration) of 1:5 or greater against 3 MenB strains specific for vaccine antigens (NZ98/254, 44/76-SL, and 5/99).
After immunization with 4CMenB and routine vaccines together at either 2, 4, and 6 or 2, 3, and 4 months, 99 percent or more of participants had hSBA titers of 1:5 or greater for strains 44/76-SL and 5/99. For NZ98/254, this proportion was 79 percent for vaccination at 2, 4, and 6 months with routine vaccines, 86.1 percent for vaccination at 2, 4, and 6 months without routine vaccines, and 81.7 percent for vaccination at 2,3, and 4 months with routine vaccines. The predefined criteria of a sufficient immune response was met for all three strains.
Responses to routine vaccines given with 4CMenB were noninferior (outcome not worse than treatment compared to) to routine vaccines alone for all antigens, except for the responses to pertactin (a pertussis antigen) and the pneumococcal vaccine serotype 6B.
“Fever was seen following 26 percent to 41 percent of 4CMenB doses when administered alone, compared with 23 percent to 36 percent after routine vaccines given alone and 51 percent to 61 percent after 4CMenB and routine vaccines administered together,” the authors write.
“In conclusion, 4CMenB was immunogenic, generally well tolerated, and showed minimal interference with routine vaccines in the first year of life. The flexibility in schedule allows it to be incorporated into a range of country-specific immunization schedules and for primary immunization to be completed in early infancy. If licensed, the decisions regarding vaccine introduction will require detailed assessment of potential vaccine coverage at a regional level and monitoring after implementation to determine the accuracy of such predictions. Nevertheless, this vaccine could potentially provide improved protection for infants against meningococcal disease beyond the protection provided by currently licensed vaccines.”
(JAMA. 2012;307:573-582. Available pre-embargo to the media at www.jamamedia.org)
Editor’s Note: This study was funded by Novartis Vaccines and Diagnostics. Please see the article for additional information, including other authors, author contributions and affiliations, financial disclosures, etc.
Ralph’s Note: Over 50% Chance your child will get immediately sick from the vaccination. That seems acceptable to the company.
Pneumonia wonder drug: Zinc saves lives
Respiratory tract infections, including pneumonia, are the most common cause of death in children under the age of five. In a study looking at children given standard antibiotic therapy, new research published in BioMed Central’s open access journal BMC Medicine shows how zinc supplements drastically improved children’s chances of surviving the infection. The increase in survival due to zinc (on top of antibiotics) was even greater for HIV infected children.
In a double-blind, randomized, placebo-controlled trial, 350 children, aged from six months to five years old, were treated with standard antibiotic therapy at Mulago Hospital. Half the children were given zinc and the other half a placebo.
The researchers from Makerere University found that while there was no difference between zinc and placebo in the time it took to recover from the infection (measured by time it took to return to a normal temperature, reparatory rate and oxygen saturation) the risk of death between the groups was very different. 4% of the children taking zinc died compared to 12% of the children without zinc. This means that an extra eight out of 100 children could have been saved by taking zinc. Among the HIV infected children this rose to 26 out of every 100.
Prof James Tumwine explained, “Zinc is known to bolster the immune system and zinc deficiency is rife all over the developed, and developing, world. In Uganda, where this study was performed, zinc deficiency in some areas can be as high as 70%. We would only need to give 13 of these children with pneumonia zinc on top of their antibiotics to save one life. This equates to about 4 USD – a small price to pay.”
Notes to Editors
1. Zinc adjunct therapy reduces case fatality in severe childhood pneumonia: a randomized double blind placebo-controlled trial Maheswari G Srinivasan, Grace Ndeezi, Cordelia Katureebe Mboijana, Sarah Kiguli, Gabriel S Bimenya, Victoria Nankabirwa and James K Tumwine BMC Medicine (in press)
Vitamin D deficiency high among trauma patients
New research presented at the 2012 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS) found that 77 percent of trauma patients had deficient or insufficient levels of vitamin D.
Researchers have linked a lack of vitamin D with muscle weakness, bone fractures, and the inability of bones to fully heal. In a new study, investigators sought to determine the prevalence of vitamin D deficiency among orthopaedic trauma patients.
Investigators reviewed the medical records of 1,830 adult (ages 18 and older) patients at a university Level 1 trauma center from Jan. 1, 2009 to Sept. 30, 2010. Participants with vitamin D levels below 20 ng/mL were categorized as “deficient,” and those with levels between 20 and 32 ng/mL, “insufficient” (levels between 40 and 70 ng/mL are considered “healthy.”)
Thirty-nine percent of all patients were vitamin D deficient, and another 38.4 percent had insufficient levels of vitamin D. Patients ages 18 to 25 had the lowest levels of vitamin D deficiency and insufficiency of any age group, and yet 29 percent were deficient, and 54.7 percent, insufficient.
“Vitamin D deficiency affects patients of all ages and is more prevalent than we thought it was,” said Brett D. Crist, MD, lead investigator and co-director of the Orthopaedic Trauma Service, Department of Orthopaedic Surgery, University of Missouri. The findings are important “as vitamin D deficiency has been linked to increased incidences of fracture nonunions (bone breaks that fail to heal).”
With the new data showing that a significant number of patients have deficient or insufficient levels of vitamin D, physicians should consider treating fracture patients with a supplement to ensure optimal outcome, said Dr. Crist, who provides vitamin D and calcium supplements to all trauma patients in his care, except to those patients for whom higher levels of calcium are not recommended.
“Although we’ve gone to treating most patients with weekly high dose vitamin D, in addition to daily vitamin D and calcium, monitoring vitamin D levels can be done to diagnose and monitor levels,” said Dr. Crist. Vitamin D deficiency is “easy to manage,” and “can prevent future fractures and improve healing of current fractures.”
It is extremely difficult to naturally obtain enough vitamin D. An adult needs at least 1,000 International Units (IU) of vitamin D (10 glasses of milk and one fish meal each day), and a child, 400 to 800 IUs for good health, depending on age, weight and growth.
To ensure appropriate levels of vitamin D, a daily supplement is recommended for children and adults.
Drinking large amounts of soft drinks associated with asthma and COPD
A new study published in the journal Respirology reveals that a high level of soft drink consumption is associated with asthma and/or chronic obstructive pulmonary disease (COPD).
Led by Zumin Shi, MD, PhD, of the University of Adelaide, researchers conducted computer assisted telephone interviewing among 16,907 participants aged 16 years and older in South Australia between March 2008 and June 2010 inquiring about soft drink consumption. Soft drinks comprised Coke, lemonade, flavored mineral water, Powerade, and Gatorade etc.
Results showed that one in ten adults drink more than half a liter of soft drink daily in South Australia. The amount of soft drink consumption is associated with an increased chance of asthma and/or COPD. There exists a dose-response relationship, which means the more soft drink one consumes, the higher the chance of having these diseases.
Overall, 13.3% of participants with asthma and 15.6% of those with COPD reported consuming more than half a liter of soft drink per day.
The odds ratio for asthma and COPD was 1.26 and 1.79, comparing those who consumed more than half a liter of soft drink per day with those who did not consume soft drinks.
Furthermore, smoking makes this relationship even worse, especially for COPD. Compared with those who did not smoke and consume soft drinks, those that consumed more than half a liter of soft drink per day and were current smokers had a 6.6-fold greater risk of COPD.
“Our study emphasizes the importance of healthy eating and drinking in the prevention of chronic diseases like asthma and COPD,” Zumin concludes.
Fasting weakens cancer in mice
New study finds that short fasting cycles can work as well as chemotherapy, and the 2 combined greatly improve survival
Man may not live by bread alone, but cancer in animals appears less resilient, judging by a study that found chemotherapy drugs work better when combined with cycles of short, severe fasting.
Even fasting on its own effectively treated a majority of cancers tested in animals, including cancers from human cells.
The study in Science Translational Medicine, part of the Science family of journals, found that five out of eight cancer types in mice responded to fasting alone: Just as with chemotherapy, fasting slowed the growth and spread of tumors.
And without exception, “the combination of fasting cycles plus chemotherapy was either more or much more effective than chemo alone,” said senior author Valter Longo, professor of gerontology and biological sciences at the University of Southern California.
For example, multiple cycles of fasting combined with chemotherapy cured 20 percent of mice with a highly aggressive type of children’s cancer that had spread throughout the organism and 40 percent of mice with a more limited spread of the same cancer.
No mice survived in either case if treated only with chemotherapy.
Only a clinical trial lasting several years can demonstrate whether humans would benefit from the same treatment, Longo cautioned.
Results from the first phase of a clinical trial with breast, urinary tract and ovarian cancer patients, conducted at the USC Norris Comprehensive Cancer Center and led by oncologists Tanya Dorff and David Quinn, in collaboration with Longo, have been submitted for presentation at the annual meeting of the American Society of Cancer Oncologists.
The first phase tests only the safety of a therapy, in this case whether patients can tolerate short-term fasts of two days before and one day after chemotherapy.
“We don’t know whether in humans it’s effective,” Longo said of fasting as a cancer therapy. “It should be off limits to patients, but a patient should be able to go to their oncologist and say, ‘What about fasting with chemotherapy or without if chemotherapy was not recommended or considered?”
In a case report study with self-reported data published in the journal Aging in 2010, 10 cancer patients who tried fasting cycles perceived fewer side effects from chemotherapy.
Longo stressed that fasting may not be safe for everyone. The clinical trial did not enroll patients who already had lost more than 10 percent of their normal weight or who had other risk factors, such as diabetes. Fasting also can cause a drop in blood pressure and headaches, which could make driving and other activities dangerous for some patients.
In mice, the study found that fasting cycles without chemotherapy could slow the growth of breast cancer, melanoma, glioma and human neuroblastoma. In several cases, the fasting cycles were as effective as chemotherapy.
Fasting also extended survival in mice bearing a human ovarian cancer. In the case of melanoma, the cancer cells became resistant to fasting alone after a single round, but the single cycle of fasting was as effective as chemotherapy in reducing the spread of cancer to other organs.
For all cancers tested, fasting combined with chemotherapy improved survival, slowed tumor growth and/or limited the spread of tumors.
As with any potential cancer treatment, fasting has its limits. The growth of large tumor masses was reduced by multiple fasting and chemotherapy cycles, but cancer-free survival could not be achieved. Longo speculated that cells inside a large tumor may be protected in some way or that the variety of mutations in a large mass may make it more adaptable.
But he noted that in most patients, oncologists have at least one chance to attack the cancer before it grows too large.
Longo and collaborators at the National Institute on Aging studied one type of breast cancer in detail to try to understand the effects of fasting.
While normal cells deprived of nutrients enter a dormant state similar to hibernation, the researchers saw that the cancer cells tried to make new proteins and took other steps to keep growing and dividing.
The result, Longo said, was a “cascade of events” that led to the creation of damaging free radical molecules, which broke down the cancer cells’ own DNA and caused their destruction.
“The cell is, in fact, committing cellular suicide. What we’re seeing is that the cancer cell tries to compensate for the lack of all these things missing in the blood after fasting. It may be trying to replace them, but it can’t,” Longo said.
The new study bookends research published in Proceedings of the National Academy of Sciences in 2008.
In that study, Longo’s team showed that fasting protected normal cells against chemotherapy, but did not address the effect on cancer cells. The study also focused only on a single cancer and chemotherapy drug.
The new study on a range of cancers and common chemotherapy drugs extends the 2008 results by showing that fasting not only fails to protect cancer cells, but makes them more vulnerable.
Longo called the effect “Differential Stress Sensitization” to reflect the change in vulnerability between normal and cancerous cells.
Longo’s interest in fasting and cancer grew from years of studies on the beneficial effects of fasting in yeast and other organisms. He showed 15 years ago that starved yeast cells enter a stress-resistant mode as they wait for better times.
By contrast, he said, the mutations in cancer cells come at a cost, such as a loss in adaptability to diverse environments. For example, Longo found that yeast genetically modified to resemble cancer cells become much more sensitive to several toxins.
“A way to beat cancer cells may not be to try to find drugs that kill them specifically but to confuse them by generating extreme environments, such as fasting that only normal cells can quickly respond to,” Longo said.
Halting bone-building osteoporosis drug use cuts risk for additional atypical femur fracture in half
SAN FRANCISCO —There is growing evidence that supports an association between atypical fractures of the femur– a rare break of the thigh bone, typically without trauma – and the use of bisphosphonates, drugs proven to enhance bone density and reduce fracture incidence caused by osteoporosis. While the risk for suffering an atypical femur fracture while taking bisphosphonates is still very small – just 1 in 1,000 patients after six years of treatment – research presented today at the 2012 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS) found that discontinuing bisphosphonate use following an atypical femur fracture can significantly lower the risk for a subsequent atypical fracture.
Scientists believe that bisphosphonates may suppress the body’s natural process of remodeling — where old bone tissue is replaced with new, healthy tissue – in some patients, resulting in brittle bones susceptible to atypical fractures, especially in the femur.
Investigators reviewed femur fracture data from Jan. 1, 2007 until Dec. 31, 2009 in patients older than 45 enrolled in a large California HMO. There were 126 patients with an atypical femur fracture who reportedly took bisphosphonates prior to their bone break.
The incidence of a subsequent atypical femur fracture occurring in the other thigh was 53.9 percent in patients who continued bisphosphonates for three or more years after their first fracture, compared to 19.3 percent in patients who discontinued bisphosphonate use. Overall, subsequent atypical femur fractures were decreased by 65.6 percent when bisphosphonates were stopped within one year following the first fracture.
“The risk of a contralateral atypical femur fracture (on the opposite side) increases over time if the bisphosphonates are continued,” said lead investigator Richard Dell, MD, a researcher in the Department of Orthopaedics at Kaiser Permanente. “Based on these observations, we recommend discontinuing bisphosphonate use as soon as possible after the initial atypical femur fracture has occurred.”
Dr. Dell then recommends the ongoing evaluation of these patients, through X-ray or MRI, as they still are at risk for a subsequent, atypical femur fracture on the other femur.
If the patient is at high risk for other fractures, the study recommends use of an alternative osteoporosis medication.
NIH study links high levels of cadmium, lead in blood to pregnancy delay
Higher blood levels of cadmium in females, and higher blood levels of lead in males, delayed pregnancy in couples trying to become pregnant, according to a study by researchers at the National Institutes of Health and other academic research institutions.
Cigarette smoke is the most common source of exposure to cadmium,, a toxic metal found in the earth’s crust, which is used in batteries, pigments, metal coatings and plastics. Smokers are estimated to have twice the levels of cadmium as do non-smokers. Exposure also occurs in workplaces where cadmium-containing products are made, and from the air near industrial facilities that emit cadmium. Airborne cadmium particles can travel long distances before settling on the ground or water. Soil levels of cadmium vary with location. Fish, plants, and animals absorb cadmium from the environment, and all foods contain at least low levels of the metal.
Lead, a toxic metal also found in the earth’s crust, is used in a variety of products, such as ceramics, pipes, and batteries. Common sources of lead exposure in the United States include lead-based paint in older homes, lead-glazed pottery, contaminated soil, and contaminated drinking water.
Exposure to these metals is known to have a number of effects on human health, but the effects on human fertility have not been extensively studied, especially when studying both partners of a couple.
The study was published online in Chemosphere. The study’s principal investigator was Germaine M. Buck Louis, Ph.D., director of the Division of Epidemiology, Statistics, and Prevention Research at the NIH’s Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD). Other authors of the study were from the NICHD, the Texas A&M Health Science Center School of Rural Public Health, College Station; The Ohio State University College of Medicine, Columbus; The EMMES Corp. in Rockville, Md.; the National Center for Environmental Health, Centers for Disease Control and Prevention, Atlanta; and the Rollins School of Public Health at Emory University, Atlanta.
“Our results indicate that men and women planning to have children should minimize their exposure to lead and cadmium,” Dr. Buck Louis said. “They can reduce cadmium exposure by avoiding cigarettes or by quitting if they are current smokers, especially if they intend to become pregnant in the future. Similarly, they can take steps to reduce their exposure to lead based paints, which may occur in older housing, including during periods of home renovation.”
To conduct the study, the researchers enrolled 501 couples from four counties in Michigan and 12 counties in Texas, from 2005 to 2009. The women ranged from 18 to 44 years of age, and the men were over 18. Couples provided blood samples for the analysis of three heavy metals. Women kept journals to record their monthly menstrual cycles and the results of home pregnancy tests. The couples were followed until pregnancy or for up to one year of trying.
The researchers ranked the study participants on the basis of their blood levels of lead and cadmium. The researchers also measured the participants’ blood mercury levels, but found they were not associated with the length of time couples required to become pregnant. Nearly every study participant had some exposure to these common metals, although blood levels of the metals varied across participants.
Researchers calculated the probability that a couple would achieve pregnancy by levels of blood cadmium and lead with a statistical measure called the fecundability odds ratio. The measure estimates couples’ probability of pregnancy each cycle, by their blood concentration of metals. A ratio less than one suggests a longer time to pregnancy, while a ratio greater than one suggests a shorter time to pregnancy. Females’ blood cadmium concentration was associated with a ratio below 1 (0.78), which means that the probability of pregnancy was reduced by 22 percent with each increase in the level of cadmium. Males’ blood lead exposure also was associated with a ratio below 1 (0.85) with increasing levels, or about a 15 percent reduction in the probability of pregnancy for each increase in the level of blood lead concentrations.
The researchers also calculated a fecundability odds ratio based on both partners’ combined lead, cadmium and mercury concentrations. The researchers found a ratio of 0.82 for male lead exposure, representing approximately a 28 percent reduction in the probability of pregnancy for each menstrual cycle, with increasing male blood lead concentration.
“The findings highlight the importance of assessing couples’ exposure jointly, in a single, combined measure,” Dr. Buck Louis said. “Males matter, because couples’ chances of becoming pregnant each cycle were reduced with increasing blood lead concentrations in men.”
Antidepressant use linked with less patient satisfaction after hip replacement
Understanding a patient’s mental health status before hip replacement surgery may improve education and care
SAN FRANCISCO – Patients taking antidepressants up to three years prior to undergoing a total hip replacement (THR) were more likely to report greater pain before and after surgery and less satisfaction with their procedure, according to new research presented today at the 2012 Annual Meeting of the American Academy of Orthopaedic Surgeons (AAOS).
In the study, 1,657 patients (13 percent of the study population) used antidepressants up to three years before surgery.
The patients were surveyed before and one year after the THR. The investigators found that a patient’s mental health status, assessed by the use of antidepressants before surgery, was a significant factor in predicting outcomes, as well as gender (men are more likely to report lower outcomes), advanced age and co-morbidity (other joint diseases or conditions which affect walking).
According to the investigators, a patient’s mental health status should be assessed prior to surgery and taken into consideration during post-operative care.
Study to determine whether fish oil can help prevent psychiatric disorders
MANHASSET, NY – Researchers at Zucker Hillside Hospital’s Recognition and Prevention (RAP) Program who have worked with teenagers at risk for serious mental illness for the past decade are now studying the effectiveness of Omega 3 fatty acids (fish oil) for treating psychiatric symptoms. This new study is a National Institute of Mental Health-funded randomized double-blind trial that was designed to test whether Omega-3 fatty acids improve clinical symptoms, and help adolescents and young adults (ages 12 to 25) who are at elevated risk for severe psychiatric disorders function better in school, work and other social environments.
“Of the 300 adolescents who have participated in the RAP Program, most have shown substantial improvement,” noted Barbara Cornblatt, Ph.D., director of the Recognition and Prevention (RAP) Program and investigator at The Feinstein Institute for Medical Research. “If this study continues to show success, Omega 3 could offer a natural alternative to the range of medications and therapies now offered to RAP participants. Ultimately, the goal of the RAP Program is to intervene and prevent illness before symptoms get worse.”
Omega 3 fatty acids are critical for normal brain function and they have been increasingly studied as potential treatments for medical and psychiatric disorders. The RAP Program study will randomly assign participants to either Omega 3 supplementation or to a placebo, and will compare the groups on key measures of symptoms and functioning after six months. Participants in both groups will be monitored closely on a monthly basis and compensation will be provided. All supplements are offered free of charge.
About the Recognition and Prevention (RAP) Program
The RAP Program is considered a leading research and treatment program in the field of early intervention and prevention of serious mental illness. The RAP Program has also joined with other early intervention research groups to form the eight-site North American Prodrome Longitudinal Study (NAPLS), a major international study consortium conducting cutting edge research with at-risk adolescents and young adults. The Omega 3 fatty acid trial will be conducted at all eight sites in order to evaluate the possibility that fish oil, widely available in health food stores, will provide protection against emerging symptoms of illness.
For more information on the RAP Program research and clinical studies, including the Omega 3 study, call 718-470-8115 or visit the RAP website at www.rapprogram.org.
Scientists sound alarm over threat of untreatable gonorrhea in United States
Trends in other countries and emerging cephalosporin resistance signal likelihood of treatment failures
Researchers are continuing to sound the alarm on the growing threat of multi-drug resistant gonorrhea in the United States, according to a Perspective commentary in the Feb. 9 issue of the New England Journal of Medicine.
In July 2011, the U.S. Centers for Disease Control and Prevention released “Cephalosporin Susceptibility Among Neisseria gonorrhoeae Isolates – United States, 2000-2010,” which signaled the potential for resistance to the cephalosporins, the last line of defense for treating gonorrhea.
The Feb. 9 New England Journal of Medicine‘s piece, “The Emerging Threat of Untreatable Gonococcal Infection,” by Gail A. Bolan, director of the Division of STD Prevention at the Centers for Disease Control and Prevention in Atlanta, P. Frederick Sparling, professor emeritus at the University of North Carolina, Chapel Hill, and Judith N. Wasserheit, professor and vice chair of the Department of Global Health at the University of Washington in Seattle, issues an urgent call to action to halt the continued increases in drug-resistant gonorrhea.
“It is time to sound the alarm,” said co-author Wasserheit. “Though there is no evidence yet of treatment failures in the United States, trends in decreased susceptibility coupled with a history of emerging resistance and reported treatment failures in other countries point to a likelihood of failures on the horizon and a need for urgent action.”
According to the article, gonorrhea is the second most commonly reported communicable disease in the United States, with an estimated incidence of more than 600,000 cases annually. It disproportionately affects some populations such as minorities who are marginalized because of race, ethnic group or sexual orientation.
Scientists note that Neisseria gonorrhoeae has always readily developed resistance to antimicrobial agents: it became resistant to sulfanilamide in the 1940s, penicillins and tetracyclines in the 1980s, and fluoroquinolones by 2007. The treatment options recommended by the CDC are now limited to third-generation cephalosporins.
But the effectiveness of cephalosporins for treating gonorrhea has been decreasing rapidly. Through CDC’s Gonococcal Isolate Surveillance Project , researchers are seeing a 17-fold increase in elevated minimum inhibitory concentrations (MICs) — a measure of drug susceptibility. MICs for oral cefixime went from 0.1 percent in 2006 to 1.7 percent in the first six months of 2011.
In the past, when the prevalence of antimicrobial resistance in the Gonococcal Isolate Surveillance Project exceeded 5 percent, national treatment recommendations were changed to focus on other effective drugs. But currently, there are no other drugs.
The most prominent increases in drug susceptibility to gonorrhea continue to be among men who have sex with men, and in the West, according to the authors. They wrote that these geographic and demographic patterns are worrisome because they mirror those observed during the emergence of fluoroquinolone-resistant N. gonorrhoeae.
Scientists are calling on a collective effort from physicians, drug companies, and health care providers to help stop the emergence and spread of resistant gonorrhea.
“Investing in rebuilding our defenses against gonococcal infections now, with involvement of the health care, public health, and research communities, is paramount if we are to control the spread and reduce the consequences of cephalosporin-resistant strains,” the scientists wrote.
Seizures in patients with pork tapeworm caused by Substance P
HOUSTON — (Feb. 9, 2012) – A neuropeptide called Substance P is the cause of seizures in patients with brains infected by the pork tapeworm (Taenia solium), said Baylor College of Medicine researchers in a report that appears online in the open access journal PLoS Pathogens.
“Neurocysticercosis or the tapeworm parasitic infection in the brain, is the major cause of acquired seizures,” said Dr. Prema Robinson, assistant professor of medicine – infectious diseases, and corresponding author of the report. “It is particularly important to understand the source of these seizures in order to develop ways to treat and prevent them.”
Substance P is a neuropeptide (a small protein-like molecule involved in neuron-to-neuron communication.) It is produced by neurons, endothelial cells (the cells that line blood vessels) and cells involved in host defense. Discovered in the 1930s, it has long been recognized as a pain transmitter. However, in recent years, it has also been found to play a role in many other functions.
Robinson realized that Substance P is involved in inflammation and wondered if it might be involved in seizure activity.
Robinson and her colleagues – including one from Tufts Medical Center in Boston – found Substance P in autopsies of the brains of patients who had the tapeworm infection. They did not find Substance P in uninfected brains.
“As long as the parasite is alive, nothing happens,” said Robinson. However, once the worm dies, the body responds with chemicals that recruit immune system cells to the site of infection, causing inflammation. Her studies showed that the cells that produce Substance P are found mainly in areas of inflammation near the dead worms.
Animals injected with Substance P alone or with extracts from the areas of inflammation (granulomas) near the worms in infected mice suffered severe seizures, she said.
When the rodents received the drug that blocks the Substance P receptor, they did not have seizures, she said.
In addition, mice that lacked the Substance P receptor did not have seizures even when injected with the extracts of granulomas from infected mice. In addition, granuloma extracts from mice that lacked the cells that make Substance P did not induce seizures.
These findings have implications for people, who often suffer seizures during treatment for the tapeworm infection, she said. As the worms die, inflammatory cells rush to the scene and the seizures begin. There are medications known to block the receptor for Substance P. These medications may prove to be the most effective means of treating and preventing seizures in these patients.
Robinson plans to look at the role Substance P may play in other diseases associated with seizures such as cancer and tuberculosis.
Obesity is associated with altered brain function
In most western countries the annual increase in the prevalence and the severity of obesity is currently substantial. Although obesity typically results simply from excessive energy intake, it is currently unclear why some people are prone to overeating and gaining weight.
Because the central nervous system is intimately involved in processing of hunger signals and controlling food intake, it is possible that the cause of weight gain and obesity might be in the brain.
Researchers at the University of Turku and Aalto University have now found new evidence for the role of the brain in obesity. The researchers measured the functioning brain circuits involved in with multiple brain imaging methods.
The results revealed that in obese versus lean individuals, brain glucose metabolism was significantly higher in the brain’s striatal regions, which are involved in processing of rewards. Moreover, obese individual’s reward system responded more vigorously to food pictures, whereas responses in the frontal cortical regions involved in cognitive control were dampened.
“The results suggest that obese individuals’ brains might constantly generate signals that promote eating even when the body would not require additional energy uptake,” says Adjunct Professor Lauri Nummenmaa from the University of Turku.
“The results highlight the role of the brain in obesity and weight gaining. The results have major implications on the current models of obesity, but also on development of pharmacological and psychological treatments of obesity,” Nummenmaa says.
The participants were morbidly obese individuals and lean, healthy controls. Their brain glucose metabolism was measured with positron emission tomography during conditions in which the body was satiated in terms of insulin signalling. Brain responses to pictures of foods were measured with functional magnetic resonance imaging.
The research is funded by the Academy of Finland, Turku University Hospital, University of Turku, Åbo Akademi University and Aalto University.
The results were published on January 27th, 2012 in scientific journal PLoS ONE.
U.S. workers are ‘giving away the store,’ costing firms billions
Clay Voorhees, assistant professor of marketing
EAST LANSING, Mich. — Nearly 70 percent of the nation’s service employees give away free goods and services – from hamburgers to cable TV – costing companies billions of dollars a year, according to a groundbreaking study.
Clay Voorhees, study co-author and marketing expert at Michigan State University, said one of the best ways to combat this illegal practice – called “sweethearting” – is through better screening of job candidates.
“Our results show that by adding a few screening questions that focus on the potential employee’s risk-taking, ethics and need for social acceptance, employers could identify ‘bad apples’ up front and simply avoid hiring them,” Voorhees said. “In the long run, this approach would address the issue.”
In the short term, Voorhees said, education and training are needed about the ramifications of sweethearting and how it damages a firm. “Simply reminding individuals of their ethical obligations can greatly reduce deviant behavior,” he said.
The study, which will appear in an upcoming issue of the Journal of Marketing, is the first to look at sweethearting specifically. Voorhees, assistant professor of marketing, co-authored the study with Michael Brady and Michael Brusco of Florida State University.
In the United States, employee theft costs firms about $200 billion a year – 40 percent of which stems from sweethearting, according to previous research.
Voorhees and colleagues surveyed nearly 800 service employees and customers in restaurants, hotels, car washes, cable television installation and repair companies, tanning salons and other retailers and service providers.
Some 67 percent of respondents said they had participated in sweethearting in the past two months. Many employees surveyed said they were motivated by the prospect of receiving better tips and similar sweetheart deals at the customer’s place of business (“tit-for-tat”).
“I was surprised by how pervasive this behavior was across a wide range of service industries,” Voorhees said. “I fully expected to see this behavior in bars and restaurants, but I was surprised at how prevalent it was in industries like retail, sports and recreation, and even with insurance claims.”
Phosphate additives pose a risk to health
Excessive consumption of phosphate is damaging to health. Therefore, food that contains phosphate additives should be labeled, as recommended by Eberhard Ritz and coauthors in their article in the current issue of Deutsches Ärzteblatt International [Dtsch Arztebl Int 2012; (109 (4): 49-55].
Ritz et al. selectively review the literature on the subject, which documents the fact that ex-cessive phosphate consumption elevates mortality in patients with renal disease. Recent stud-ies have also shown that phosphate apparently damages blood vessels and induces aging pro-cesses. Free phosphate (the type found in food additives) is entirely resorbed in the gastroin-testinal tract. Persons with renal disease have been found to have a markedly elevated serum phosphate concentration.
Phosphate additives are present in many types of fast food, which are eaten mainly by persons of lower socioeconomic status. It seems likely that excessive phosphate consumption is linked to the increased prevalence of cardiovascular diseases in the general population.
The authors conclude that physicians and the public need to be educated about the role of phosphate additives as a risk factor for disease.
Curry spice component may help slow prostate tumor growth
Data supports use of curcumin in combination with androgen deprivation therapy to reduce castrate-resistant prostate cancer cell and tumor growth
|IMAGE:A team led by Karen Knudsen, Ph.D., a professor of cancer biology, urology and radiation oncology at Thomas Jefferson University, found that curcumin, an active component of the Indian curry…|
PHILADELPHIA—Curcumin, an active component of the Indian curry spice turmeric, may help slow down tumor growth in castration-resistant prostate cancer patients on androgen deprivation therapy (ADT), a study from researchers at Jefferson’s Kimmel Cancer Center suggests.
Reporting in a recent issue of Cancer Research, Karen Knudsen, Ph.D., a Professor of Cancer Biology, Urology and Radiation Oncology at Thomas Jefferson University, and colleagues observed in a pre-clinical study that curcumin suppresses two known nuclear receptor activators, p300 and CPB (or CREB1-binding protein), which have been shown to work against ADT.
ADT aims to inhibit the androgen receptor—an important male hormone in the development and progression of prostate cancer—in patients. But a major mechanism of therapeutic failure and progression to advanced disease is inappropriate reactivation of this receptor. Sophisticated tumor cells, with the help of p300 and CPB, sometimes bypass the therapy.
Thus, development of novel targets that act in concert with the therapy would be of benefit to patients with castration-resistant prostate cancer.
For the study, prostate cancer cells were subjected to hormone deprivation in the presence and absence of curcumin with “physiologically attainable’ doses. (Previous studies, which found similar results, included doses that were not realistic.)
Curcumin augments the results of ADT, and reduced cell number compared to ADT alone, the researchers found. Moreover, the spice was found to be a potent inhibitor of both cell cycle and survival in prostate cancer cells.
To help support their findings, the researchers also investigated curcumin in mice, which were castrated to mimic ADT. They were randomized into two cohorts: curcumin and control. Tumor growth and mass were significantly reduced in the mice with curcumin, the researchers report.
These data demonstrate for the first time that curcumin not only hampers the transition of ADT-sensitive disease to castration-resistance, but is also effective in blocking the growth of established castrate-resistant prostate tumors.
“This study sets the stage for further development of curcumin as a novel agent to target androgen receptor signaling,” said Dr. Knudsen. “It also has implications beyond prostate cancer since p300 and CBP are important in other malignancies, like breast cancer. In tumors where these play an important function, curcumin may prove to be a promising therapeutic agent.”
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Medical Researchers who sacrificed their time and effort. In order to give people the
ability to empower themselves. Without the base aspirations for fame, or fortune. Just honorable people, doing honorable things.