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Effects of male reproductive toxicants on gene expression in rat testes.

Predictive biomarkers of testicular toxicity are needed for an efficient development of drugs. The purpose of the present study was to obtain further insight into the toxicity mechanisms of various male reproductive toxicants and to detect genomic biomarkers for rapid screening of testicular toxicity. Four reproductive toxicants, 2,5-hexanedione (Sertoli cells toxicant), ethylene glycol monomethyl ether (EGME; spermatocytes toxicant), cyclophosphamide (spermatogonia toxicant) and sulfasalazine, were orally administered to male rats once. Six hours after the single dosing, gene expression in th