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Major statin study reveals several important findings for reducing prostate cancer and disease

ROCHESTER, Minn. -- Statins, drugs widely prescribed to lower cholesterol, may have protective effects on prostate health. This large Mayo Clinic cohort study looked at three different aspects of urological health -- prostate cancer, erectile dysfunction and prostate enlargement. Initial research results are being presented April 25-30, 2009, at the American Urological Association (AUA) meeting in Chicago.

    VIDEO ALERT: Additional audio and video resources, including excerpts from an interview with Drs. St. Sauver, Karnes and Breau describing the research, are available on the Mayo Clinic News Blog,. These materials are also subject to embargo, but may be accessed in advance by journalists for incorporation into stories. The password for this post is password Statin049.

These Mayo Clinic study findings came from data in the Olmsted County Study of Urinary Health Status among Men, a large cohort study of men living in Olmsted County, Minn. This study has followed 2,447 men ages 40 to 79 from 1990 to the present to assess various urologic outcomes among aging men.

"One of the major advantages of this large cohort study is that the men have participated in this study for over 15 years. Because of this, we have the ability to look at associations between statin use, how long statins were used and multiple aspects of urologic function," says Jennifer St. Sauver, Ph.D., Mayo Clinic epidemiologist and study author.

Three significant abstracts are being presented at the AUA meeting:

Statins May Reduce Risk of Prostate Cancer (April 26, 3:30-5:30 p.m. CDT)

In the first study, researchers followed the 2,447 men for over 15 years and discovered that men taking statins were less likely to develop prostate cancer, compared to men who did not take statins.

Of the statin users, 38 (6 percent) were diagnosed with prostate cancer. Comparatively, non-statin users were three times more likely to develop prostate cancer, suggesting statin use may prevent development of prostate cancer.

"In recent years, it has been suggested that statin medications may prevent development of cancer. However, until now, there has been limited evidence to support this theory," says Rodney Breau, M.D., a Mayo Clinic urologic oncology fellow who led the study. "Our research provides evidence that statin use is associated with a threefold reduced risk of being diagnosed with prostate cancer."

Statin medications are currently used to lower cholesterol or to help prevent heart attack and stroke in high-risk patients. In the laboratory setting, researchers have observed that statin medications prevent cancer cells from dividing and, in fact, may cause some cancer cells to die.

"In the United States, one in six men will develop prostate cancer; however, far more will develop heart disease," says Jeffrey Karnes, M.D., Mayo Clinic urologist and senior author on the study. "I tell my patients to take care of their heart because what's good for the heart is also good for the prostate."

The investigators emphasize that these results are preliminary. To determine if statins are protective for prostate cancer, randomized controlled trials are necessary, says Dr. Karnes.

Statin Use May Protect Against Erectile Dysfunction (April 27, 10:30 a.m.-12:30 p.m. CDT)

Hyperlipidemia, high cholesterol and other risk factors for heart disease have been shown to put men at risk for erectile dysfunction (ED). With this in mind, Mayo Clinic researchers studied 1,480 men from the Olmsted County cohort to determine if men who used statins were less likely to develop erectile dysfunction, compared to men who did not use statins.

Overall, statin use was not significantly associated with a decreased risk of developing ED. However, statins were associated with a decreased risk of ED among older men (>60 years). Men in this age category who used statins were less likely to develop ED, compared to older men who did not use statins. Additionally, men who took statins for a longer time were more protected against developing ED. For example, men who took statins for nearly nine years or more were 64 percent less likely to develop ED, while men who took statins for less than three years had about the same risk of developing ED. compared to men who did not take statins.

"Protection of vascular health remains an important concomitant of preserving erectile health. Our data suggest that longer use of statins may result in the lowest risk of erectile dysfunction," says Ajay Nehra, M.D. , Mayo Clinic urologist and senior study author.

ED is common, and prevalence increases with age. It affects 5 to 10 percent of men at age 40. By age 70, from 40 to 60 percent of men have the condition.

Statin Use May Prevent Prostate Enlargement (April 28, 1:00-3:00 p.m. CDT)

Benign prostatic enlargement affects one in four men ages 40 to 50 and almost half of 70- to 80-year-old men. The condition is most often diagnosed when men visit their physicians due to urinary problems prompted by prostate enlargement. Mayo Clinic researchers have found that taking statins may prevent or delay benign prostatic enlargement.

Of the 2,447 men studied, 729 (30 percent) were statin users; researchers found that statin users were 63 percent less likely to develop lower urinary tract problems and 57 percent less likely to develop an enlarged prostate.

"Statins have been shown to have anti-inflammatory effects, and previous research suggests inflammation may be associated with benign prostate disease," says Dr. St. Sauver. "This study suggests that men's urinary health could be improved by taking statin medications."

Further Study Needed

The researchers note that further studies, particularly clinical trials, are necessary to determine whether taking statins might prevent development of this common condition.

"If you are taking a statin for a heart condition or to lower cholesterol, these studies suggest that statins could have other benefits," says Dr. St. Sauver. "However, it's very clear we need more information before men are advised to start taking statins for their urological health."


Contact: Traci Klein
Mayo Clinic

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