Melatonin reduces gamma radiation-induced primary DNA damage in human blood lymphocytes.

Abstract excerpt

Peripheral blood samples were collected from human volunteers 5-10 min before, and at 1 and 2 h after a single oral dose of 300 mg of melatonin. At each time point: (1) the concentration of melatonin in the serum and in the leukocytes was determined; and (2) the whole blood was exposed in vitro to 100 cGy of gamma radiation. Immediately after exposure to the radiation, the lymphocytes were examined to determine...

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