Abstract
Oxytocin receptor (OTR) expressed in the rat penis and mediated the contractility of the corpus cavernosum smooth muscle both in vitro and in vivo, and OTR could maintain penile detumescence; however, the expression of OTR in diabetic rat penis remains unknown. In the present study, we investigated the expression of OTR in diabetic rat penis. The experimental rats were randomly divided into control group and STZ-diabetic rats group. The expressions of mRNA and protein were examined by real-time quantitative PCR, Western blotting and immunohistochemistry respectively. Erectile function was evaluated by measuring intracavernous pressure following electrostimulation of the cavernous nerves. mRNA and protein expression of OTR significantly increased in diabetic rats group compared with the control group. Erectile function of diabetic rats group significantly decreased compared with the control group. Our data showed that the expression of OTR significantly increased in diabetic rats group and OTR may involve in the development of diabetic erectile dysfunction.
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