Abstract
In order to investigate the hepatoprotective effects of whey protein isolate against acute liver toxicity induced by dimethylnitrosamine (DMN), a randomized experimental study was conducted. Forty-eight Sprague Dawley rats were randomly divided into three groups. Groups A and B consumed a diet containing casein, and group C received a diet containing whey protein isolate for 18 days. Group A was then given an intraperitoneal saline injection. It continued on the casein diet for another 4 days before being sacrificed. Each animal in groups B and C was given a single intraperitoneal injection of DMN (30 mg/kg) on the 18th day of the study. All groups continued their diets for 4 days before their euthanasia. The supply of whey protein diet resulted in a decrease in aspartate amino transferase, alanine amino transferase, alkaline phosphatase, total bilirubin, and malondialdehyde (MDA). Morphological and biochemical data suggested that a diet containing whey protein isolate decreased DMN-induced liver damage and, therefore, had beneficial effects on hepatic failure.
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