Nephrotoxic and hepatotoxic effects of trivalent and hexavalent chromium in a teleost fish Anabas scandens: enzymological and biochemical changes.

The effects of trivalent and hexavalent chromium (Cr3+ and Cr6+) compounds on renal and hepatic respiratory enzymes and metabolites of a freshwater fish, Anabas scandens, were studied. In a subchronic exposure of 30 days, both forms of chromium inhibited the activities of lactate dehydrogenase, succinate dehydrogenase, malate dehydrogenase, and isocitrate dehydrogenase, whereas the hexavalent form induced greater effects. The levels of pyruvate and lactate are not exactly reflected in lactate dehydrogenase activity.