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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Ameliorating effect of folic acid on chromium(VI)-induced changes in reproductive performance and seminal plasma biochemistry in male rabbits.

Chromium hexavalent (Cr(VI)) is a biologically active oxidized state of chromium. It is involved in the redox cycle, with the production of reactive oxygen species. Free radical scavenging properties and possible antioxidant activity of folic acid (FA) have been reported; therefore, the present study examined possible protective effects of FA on the reproductive toxicity of potassium dichromate (K2Cr2O7) in male New Zealand white rabbits. We monitored reproductive performance, lipid peroxidation, enzyme activities and biochemical parameters in seminal plasma. Six rabbits per treatment group (and a control group) were exposed: 8.3 microg/kg FA; 5 mg/kg potassium dichromate (contains 3.6 mg chromium(VI)) and 5 mg/kg potassium dichromate+8.3 microg/kg FA. Results showed that semen quality deteriorated following potassium dichromate exposure. Testosterone levels, body weight (BW), relative weights of testes (RTW) and epididymis (REW) all decreased. Levels of thiobarbituric acid-reactive substances increased, whereas the activities of glutathione S-transferase, transaminases and phosphatases decreased in the seminal plasma. FA alone significantly increased BW, RTW, REW, semen characteristics and seminal plasma enzymes, and decreased the levels of free radicals. Furthermore, FA can be effective in the protection of chromium-induced reproductive toxicity.[1]


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