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Jung AR, Choi YS, Piao S, Park YH, Shrestha KR, Jeon SH, Hong SH, Kim SW, Hwang TK, Kim KH, Lee JY. The effect of PnTx2-6 protein from Phoneutria nigriventer spider toxin on improvement of erectile dysfunction in a rat model of cavernous nerve injury. Urology 2014; 84:730.e9-17. [PMID: 25168567 DOI: 10.1016/j.urology.2014.05.030] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 05/01/2014] [Accepted: 05/23/2014] [Indexed: 10/24/2022]
Abstract
OBJECTIVE To explore the therapeutic potential of PnTx2-6 injected 3 times a week for 4 weeks into the intracavernosal tissue in a rat model of bilateral cavernous nerve crush injury (BCNI). METHODS Eight-week-old male Sprague-Dawley rats were randomly divided into the following 6 groups (n = 5 per group): age-matched control (normal group), BCNI (injury group), post-BCNI phosphate-buffered saline injection (PBS group), post-BCNI Sf9 cell-lysate injection (N/C group), post-BCNI injection of cell lysate from S9 cells infected with wild-type recombinant baculovirus (W/T group), and post-BCNI injection of cell lysate from S9 cells infected with recombinant baculovirus containing PnTx2-6 (PnTx2-6 group). Injections were delivered 3 times a week for 4 weeks. After 4 weeks, intracavernosal pressure-to-mean arterial pressure ratio, smooth muscle and collagen content via the Masson trichrome staining, levels of neural nitric oxide synthase, phosphoendothelial nitric oxide synthase, and cyclic guanosine monophosphate were all measured. RESULTS The PnTx2-6 group showed significantly higher intracavernosal pressure-to-mean arterial pressure ratio (P <.05), smooth muscle-to-collagen ratio (P <.01), expression levels of neural nitric oxide synthase, phosphoendothelial nitric oxide synthase (P <.05), and cyclic guanosine monophosphate (P <.05) than all other experimental groups. CONCLUSION We conclude that PnTx2-6 improved erectile function and prevented muscle atrophy in a rat model of BCNI via increased synthesis of nitric oxide and cyclic guanosine monophosphate.
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Affiliation(s)
- Ae Ryang Jung
- Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Yong Sun Choi
- Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Shuyu Piao
- Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Yong Hyun Park
- Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Kshitiz Raj Shrestha
- Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Seung Hwan Jeon
- Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Sung-Hoo Hong
- Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Sae Woong Kim
- Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Tae-Kon Hwang
- Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea
| | - Ki Hean Kim
- Department of Mechanical Engineering, Pohang University of Science and Technology, Pohang, Gyengbuk, Republic of Korea
| | - Ji Youl Lee
- Department of Urology, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea.
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