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Inhibition of interleukin-6 attenuates erectile dysfunction in a rat model of nerve-sparing radical prostatectomy.

Authors: Yamashita, S  Kato, R  Kobayashi, K  Hisasue, S  Arai, Y  Tsukamoto, T 
Citation: Yamashita S, etal., J Sex Med. 2011 Jul;8(7):1957-64. doi: 10.1111/j.1743-6109.2011.02283.x. Epub 2011 Apr 14.
Pubmed: (View Article at PubMed) PMID:21492407
DOI: Full-text: DOI:10.1111/j.1743-6109.2011.02283.x

INTRODUCTION: The precise mechanisms underlying erectile dysfunction (ED) occurring after cavernous nerve (CN)-sparing surgery remain to be determined. Aim. To evaluate the expression of interleukin-6 (IL-6) and IL-6 receptor (IL-6R) after CN injury, and the effect of inhibiting IL-6 bioactivity on nerve injury-related ED. METHODS: Male Sprague-Dawley rats were divided into three groups: sham operation; bilateral CN dissection without crushing or cutting; and bilateral CN resection. In the interventional experiment, male rats underwent bilateral CN dissection, and anti-rat IL-6 antibody in phosphate-buffered saline (PBS) or vehicle alone was injected intraperitoneally immediately and 24 hours after CN dissection. MAIN OUTCOME MEASURES: One, 3, 7, 28, and 56 days after surgery, the expression of IL-6 and IL-6R in the major pelvic ganglion (MPG) was examined by real-time polymerase chain reaction. In the interventional experiment, erectile function was assessed by determining intracavernous pressure divided by arterial pressure (ICP/AP) during electrical pelvic nerve stimulation at 4 weeks after surgery in the anti-IL-6-injected rats and PBS-injected rats. The degree of nerve injury was also evaluated by retrograde dye tracing with Fluorogold. RESULTS: The expression levels of IL-6 and IL-6R were increased in the early period of CN injury, as compared with the sham group. IL-6 expression on day 1 was particularly enhanced. Four weeks after CN dissection, the anti-IL-6 group had greater ICP/AP and more FG-positive cells than the PBS group. CONCLUSIONS: Expression levels of IL-6 in the MPG were increased in the acute phase following CN injury. Inhibition of IL-6 bioactivity attenuated ED following CN dissection. Thus, the suppression of excess inflammatory responses in the acute phase may lead to improvements in ED occurring after nerve-sparing radical prostatectomy.


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RGD Object Information
RGD ID: 10402827
Created: 2015-10-30
Species: All species
Last Modified: 2015-10-30
Status: ACTIVE


RGD is funded by grant HL64541 from the National Heart, Lung, and Blood Institute on behalf of the NIH.