Melatonin reduces kidney failure
AMERICAN JOURNAL OF PHYSIOLOGY-RENAL PHYSIOLOGY, 2000, Vol 279, Iss 5, pp F910-F918
A recent study evaluated the effect of melatonin, a potent free radical scavenger, on mercury-induced kidney failure. Rats received 1 mg/kg of melatonin or placebo, 30 min before the mercury (mercuric chloride). Melatonin pretreatment (melatonin blood levels of 3 mg/ml at the time of mercury administration) prevented the increment in blood creatinine and reduced death of kidney tubules from 41 to 4.2! In the group untreated with melatonin, apoptosis (cell death) and post necrotic proliferative activity (the sum of morphological changes indicative of cell death and caused by the progressive degradative action of enzymes) were twice more intense. Melatonin prevented an increase in kidney content of malondialdehyde (MDA, stress marker) and decrease in glutathione (GSH) resulting from mercury toxicity. Melatonin also induced an important reduction in superoxide-positive cells. Thus, the beneficial effects of pharmacological doses of melatonin in kidney disease are due to its antioxidant properties.
AMERICAN JOURNAL OF PHYSIOLOGY-RENAL PHYSIOLOGY, 2000, Vol 279, Iss 5, pp F910-F918
A recent study evaluated the effect of melatonin, a potent free radical scavenger, on mercury-induced kidney failure. Rats received 1 mg/kg of melatonin or placebo, 30 min before the mercury (mercuric chloride). Melatonin pretreatment (melatonin blood levels of 3 mg/ml at the time of mercury administration) prevented the increment in blood creatinine and reduced death of kidney tubules from 41 to 4.2! In the group untreated with melatonin, apoptosis (cell death) and post necrotic proliferative activity (the sum of morphological changes indicative of cell death and caused by the progressive degradative action of enzymes) were twice more intense. Melatonin prevented an increase in kidney content of malondialdehyde (MDA, stress marker) and decrease in glutathione (GSH) resulting from mercury toxicity. Melatonin also induced an important reduction in superoxide-positive cells. Thus, the beneficial effects of pharmacological doses of melatonin in kidney disease are due to its antioxidant properties.

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