Increased expression of insulin-like growth factor-binding protein-3 is implicated in erectile dysfunction in two-kidney one-clip hypertensive rats after propranolol treatment

作者：Zhou, Zhang-Yan; Yang, Zhong-Hua; Wang, Xing-Huan^*; Cao, Hong; Chen, Dong; Wang, Yong-Zhi; Zhou, Hai-Hong; Peng, Mou; Liu, Quan-Liang; Wan, Shao-Ping

来源：Asian Journal of Andrology, 2011, 13(6): 851-855.

DOI：10.1038/aja.2011.99

• erectile dysfunction
• insulin-like growth factor-binding protein-3
• propranolol
• two-kidney one-clip hypertension

This study aimed to investigate the role of insulin-like growth factor-binding protein-3 (IGFBP-3) in erectile dysED) in two-kidney one-clip (2K-1C) hypertensive rats treated with the beta-blocking agent propranolol. Adult male Wistar rats were randomly divided into three groups: a normal control group, a hypertensive control group and a propranolol treatment group (n=9). After 4 weeks of propranolol treatment, intracavernous pressure (ICP) responses to electrical stimulation of the cavernous nerves were evaluated. The expression of IGFBP-3 and insulin-like growth factor-1 (IGF-1) mRNA and protein in the rat cavernous tissue were detected by quantitative real-time PCR and Western blot, respectively. The concentration of cyclic guanosine monophosphate (cGMP) in the cavernous tissue was determined by enzyme-linked immunosorbent assay (ELISA). Cavernosal pressure in response to cavernous nerve stimulation was decreased 4 weeks after propranolol treatment (P<0.01, compared to the hypertensive control group). IGFBP-3 mRNA and protein expression was increased in the propranolol treatment group compared to the hypertensive control group (P<0.01), whereas IGF-1 expression was decreased in the propranolol treatment group compared to the hypertensive control group (P<0.01). In addition, cavernous cGMP concentration was decreased in the propranolol treatment group compared to the hypertensive control group (P<0.01). Taken together, these results suggest that the upregulation of IGFBP-3 may play a role in the development of ED in hypertensive rats. Asian Journal of Andrology (2011) 13, 851-855; doi: 10.1038/aja.2011.99; published online 29 August 2011

• 出版日期2011-11
• 单位武汉大学