Public release date: 30-Oct-2007
Treatment with a derivative of vitamin A called retinoic acid was associated with reduced lung cell growth in a group of former heavy smokers, according to a study published online October 30 in the Journal of the National Cancer Institute.
Former smokers remain at elevated risk for lung cancer. According to one hypothesis, lung cells that were damaged during years of smoking may continue to grow and evolve into cancer even after that person has quit smoking. Previous studies have suggested that retinoids, a class of drugs related to vitamin A, may be effective for preventing lung cancer in former smokers. Retinoids have also been shown to slow the growth of cancer cells in laboratory experiments.
In patients given 13-cis-retinoic acid and vitamin E, there was a statistically significant reduction in parabasal layer cell growth compared with the placebo treatment, but not in those given 9-cis-retinoic acid. When the data were analyzed by the biopsy site, both treatments statistically significantly reduced cell growth.
Ralph’s Note- There have been multiple studies now in the past few weeks showing Vitamin A is good for smokers. Yet the media keeps on steering smokers away from all forms of Vitamin A.