Mechanism of rat testis toxicity induced by organic extract from Jialing river water / 第三军医大学学报

ABSTRACT

Objective To study the toxicity of organic extract from river water on the male reproductive system in rats.Methods Organic pollutants were extracted from river water with XAD-2 resin and the extract from 2,16 and 80 L river water was administered daily into 30 male SD rats by gavage for consecutive 28 days.Corn oil served as the solvent control in another ten rats.After the last intake of water extract,all rats were killed,and the sections of testis were prepared according to routine procedure.The TUNEL assay for in situ detection of apoptosis and quantitation of apoptotic germ were performed on testicular sections.Immunohistochemistry and Western blotting were used to examine the changes of scf,fas,fasL and c-kit expressions in rat testis.Results The percentage of apoptotic spermatid cells significantly increased in rats receiving organic extract from 80 L water daily,as compared with the control rats.The spermatocytes in rats receiving organic extract from 80 L water daily overexpressed fas,fasL and c-kit.Conclusion The organic pollutants from river water result in spermatid apoptosis and spermatogenesis arrest.