Article: Effect of melatonin and pineal extracts on human ovarian and mammary tumor cells in a chemosensitivity assay.

Pinealectomy enhances tumor growth and metastatic spread in experimental animals. This effect is only in part due to melatonin since melatonin-free pineal extracts containing yet unidentified pineal substances have also shown tumor inhibiting activity. Despite numerous reports suggesting melatonin as a potential anti-cancer agent there have not been sufficient clinical trials to define the actual therapeutic potential of melatonin for the treatment of human cancers. To help fill this gap, we used a chemosensitivity assay designed to test the sensitivity of tumors from individual patients towards chemotherapeutic drugs for assessing the effect of melatonin and pineal ...

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