~ Vitamin D Drug Plus NSAID Suppresses Prostate Cancer Cell Growth

The findings of Stanford University School of Medicine researchers published in the September 1 2005 issue of the journal Cancer Research (http://cancerres.aacrjournals.org) show that adding a nonsteroidal anti-inflammatory drug (NSAID) to the active form of vitamin D known as calcitriol reduces the growth of cultured prostate cancer cells by up to 70 percent. The study’s lead author, professor of medicine David Feldman, MD had previously demonstrated that calcitriol limits prostate cancer cell growth.

Dr Feldman’s team tested calcitriol and the NSAIDs naproxen and ibuprofen on prostate cancer cell cultures and found a 25 percent growth reduction associated with each drug. But when both calcitriol and a NSAID were administered in amounts equal to one-tenth to one-half of the quantities used when either drug was tested alone, a 75 percent reduction occurred.

DNA microarray tests revealed two genes affected by calcitriol that are involved in the production and breakdown of prostaglandins. Prostaglandins are hormones that can activate the inflammatory response, which is associated with cancer growth. Nonsteroidal anti-inflammatory drugs work similarly by blocking an enzyme, COX-2, necessary for prostaglandin synthesis.

Dr Feldman commented, "There is great enhancement when the drugs are given together, using what we think is a safe dose in humans."

"NSAIDs have their own risks," Dr Feldman cautioned. "So, we have to be careful even with lower doses and we still need to watch the patients very closely if we intend to keep them on these drugs for extended periods of time. But we are aiming to find doses that are less toxic and far more tolerable for the patient."

Dr Feldman has initiated a clinical trial that is testing the effects of administering naproxen twice daily to prostate cancer patients along with a once per week dose of calcitriol. Once per week dosing avoids the problem of too much calcium in the blood that is associated with taking calcitriol on a daily basis.

The authors "propose that a combination of calcitriol and nonselective NSAIDs might be a useful chemopreventive and/or therapeutic strategy in men with prostate cancer, as it would allow the use of lower concentrations of both drugs, thereby reducing their toxic side effects."

Free Shipping in the Continental U.S. on Orders over $50
The statements made here have not been evaluated by the FDA. The foregoing statements are based upon sound and reliable studies, and are meant for informational purposes. Consult with your medical practitioner to determine the underlying cause of your symptoms. Please always check your purchase for possible allergins and correct dosage on the bottle before use.

While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Life Ex Online assumes no liability for inaccuracies or misstatements about products.