Human & Experimental Toxicology

 

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Human & Experimental Toxicology, Vol. 24, No. 2, 61-66 (2005)
DOI: 10.1191/0960327105ht500oa

Impact of polychlorinated biphenyl Aroclor 1254 on testicular antioxidant system in adult rats

P Murugesan

J Senthilkumar

K Balasubramanian

M M Aruldhas

Department of Endocrinology, Dr. ALM. Post Graduate Institute of Basic Medical Sciences, University of Madras, Taramani Campus, Chennai, India

J Arunakaran

Department of Endocrinology, Dr. ALM. Post Graduate Institute of Basic Medical Sciences, University of Madras, Taramani Campus, Chennai-600 113, India; j_arunakaran{at}hotmail.com

To clarify the reproductive toxicity of polychlorinated biphenyl compounds through determination of testicular lipid peroxidation, reactive oxygen species and enzymatic and non-enzymatic antioxidants in rats exposed to Aroclor 1254. Adult male rats were administered Aroclor 1254 at a dose of 2 mg/kg per day ip for 30 days. The rats were sacrificed 24 hours after last dosing and the serum and other tissues collected and processed for relevant determinations. The body weight and the weights of the testis, epididymis, ventral prostate and seminal vesicle and the serum testosterone and estradiol were significantly decreased in Aroclor 1254 treated rats. The testicular lipid peroxidation, hydrogen peroxide and hydroxyl radical were significantly elevated whereas, testicular antioxidant enzymes, including superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX), glutathione-S-transferase (GST) and glutathione reductase (GR) were significantly decreased. The non-enzymatic antioxidants, vitamin C and vitamin E, were also decreased. These results suggest that Aroclor 1254 induces an increase in the lipid peroxidation, hydrogen peroxide and hydroxyl radical and diminish in the antioxidant defense system in rats, indicating that the free radical-dependent mechanism may play an important role in the testicular toxicity of polychlorinated biphenyls.

Key Words: antioxidant enzymes • lipid peroxidation • polychlorinated biphenyls • reactive oxygen species • testis


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 J EndocrinolHome page
P. Murugesan, M. Balaganesh, K. Balasubramanian, and J. Arunakaran
Effects of polychlorinated biphenyl (Aroclor 1254) on steroidogenesis and antioxidant system in cultured adult rat Leydig cells
J. Endocrinol., February 1, 2007; 192(2): 325 - 338.
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