Long-term and continuous exposure to simulate powerline magnetic fields did not result in a decreased nocturnal melatonin secretion in mice.

Melatonin inhibits the growth of mammary tumors in animals. No changes have been found in melatonin levels in climaterical women.

Melatonin has the potential to markedly delay the appearance of palpable mammary tumors, combination with flaxseed oil caused a significant decrease in the number/weight of tumors.

Melatonin can be produced by an organ or tissue other than the pineal gland.

Receptor-modulated pathway of cytotoxicity in melatonin(100 nM)-treated MCF-7 tumor cells with apparent uncoupling of oxidative phosphorylation.

Melatonin [(10(-3) M)] to prevent formation of secondary metastases, PEMF at 2 Hz, 0.3 mT does no influence cancer metastasis.

Melatonin may affect RORalpha transcriptional activity and even breast cancer cell proliferation via modulation of the Ca2+/CaM signaling pathway.

Alcohol administration has been reported to reduce the nocturnal rise in serum melatonin in rats and in humans under experimental conditions.

No abstract available.