Abstract
Diabetic disease is known to suppress male reproductive activity in laboratory animals and humans. The present study was designed to evaluate whether streptozotocin-induced diabetes increases apoptotic cell death in rat testes through activation of the JNK and Bax pathway. Diabetes was induced by a single intravenous injection of streptozotocin (40 mg/kg) and testis samples were collected after 3 months. Compared with controls, body weight and testicular weight were lower in the diabetic group, and the apoptotic index in testicular germ cells was significantly increased. Expression of phospho-JNK and Bax was significantly increased in the diabetic group, and the level of activated caspase-3 was also increased, compared to that of controls. Our findings suggest that streptozotocin-induced diabetes increases apoptotic cell death in rat testes through phosphorylation of JNK and activation of Bax.
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