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Streptozotocin-induced diabetes increases the interaction of Bad/BCl-X-L and decreases the binding of pBad/14-3-3 in rat testis

机译:链脲佐菌素诱发的糖尿病增加大鼠睾丸中Bad / BCl-X-L的相互作用并降低pBad / 14-3-3的结合

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Sexual dysfunction is frequently associated with diabetes in males. The present study was designed to evaluate whether streptozotocin-induced diabetes increases apoptotic cell death in rat testis through the regulation of Bcl-2 family proteins. Diabetes was induced by a single intravenous injection of streptozotocin (40 mg/kg body weight) and testis samples were collected after 3 months. The number of positive cells for TUNEL histochemistry was significantly increased in the testicular germ cells of the diabetic group, compared to those of control. The levels of Bcl-2 and Bcl-X-L, anti-apoptotic proteins, were decreased in the diabetic group. In contrast, the levels of Bax and Bad, pro-apoptotic factors, were increased in the diabetic group, compared with the control group. Moreover, the diabetic condition increased the interaction of Bad and Bcl-X-L, and decreased the binding of pBad and 14-3-3. 14-3-3 acts as an anti-apoptotic factor through interaction with Bad. Our findings suggest that streptozotocin-induced diabetes increases apoptotic cell death in testis tissue through the up-and down-regulation of Bcl-2 family proteins and the interaction of Bad and Bcl-X-L. (C)2007 Elsevier Inc. All rights reserved.
机译:性功能障碍通常与男性糖尿病有关。本研究旨在评估链脲佐菌素诱导的糖尿病是否通过调节Bcl-2家族蛋白增加大鼠睾丸的凋亡细胞死亡。通过单次静脉注射链脲佐菌素(40 mg / kg体重)诱导糖尿病,并在3个月后收集睾丸样品。与对照组相比,糖尿病组睾丸生殖细胞中TUNEL组织化学阳性细胞的数量明显增加。糖尿病组中抗凋亡蛋白Bcl-2和Bcl-X-L的水平降低。相反,与对照组相比,糖尿病组中促凋亡因子Bax和Bad的水平升高。此外,糖尿病状况增加了Bad和Bcl-X-L的相互作用,并降低了pBad和14-3-3的结合。 14-3-3通过与Bad相互作用而充当抗凋亡因子。我们的发现表明,链脲佐菌素诱导的糖尿病通过Bcl-2家族蛋白的上调和下调以及Bad和Bcl-X-L的相互作用增加了睾丸组织的凋亡细胞死亡。 (C)2007 Elsevier Inc.保留所有权利。

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