Tuesday, January 28, 2014

Melatonin and prostate cancer risk

Higher levels of melatonin, a hormone involved in the sleep-wake cycle, may suggest decreased risk for developing advanced prostate cancer, according to results presented at the AACR-Prostate Cancer Foundation Conference on Advances in Prostate Cancer Research.

Sleep loss and other factors can influence the amount of melatonin secretion or block it altogether, and health problems associated with low melatonin, disrupted sleep, and/or disruption of the circadian rhythm are broad, including a potential risk factor for cancer. The researchers found that men who had higher levels of melatonin had a 75 percent reduced risk for developing advanced prostate cancer compared with men who had lower levels of melatonin.


The results require replication, but support the public health implication of the importance of maintaining a stable light-dark and sleep-wake cycle. Because melatonin levels are potentially modifiable, further studies of melatonin and prostate cancer risk and progression are warranted.

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