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Possible application of melatonin treatment in human diseases of the biliary tract.

Melatonin was discovered in 1958 by Aaron Lerner; its name comes from the ability of melatonin to change the shape of amphibian melanophores from stellate to roundish. Starting from the 80s, the role of melatonin in the regulation of mammalian circadian and seasonal clocks has been elucidated. Presently, several other effects have been identified in different organs. For example, he beneficial effects of melatonin in models of liver damage have been described. This review gives first a general background on experimental and clinical data on the use of melatonin in liver damage. The second part of the review focuses on the findings related to the role of melatonin in biliary functions suggesting a possible use of melatonin therapy in human diseases of the biliary tree.