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Expression and distribution of key enzymes of the cyclic GMP signaling in the human clitoris: relation to phosphodiesterase type 5 (PDE5).
Division of Surgery, Department of Urology & Urological Oncology, Hannover Medical School, Hannover, Germany.
Division of Surgery, Department of Urology & Urological Oncology, Hannover Medical School, Hannover, Germany.
Division of Surgery, Department of Urology & Urological Oncology, Hannover Medical School, Hannover, Germany.
Faculty of Medicine, Department of Legal & Forensic Medicine, Johannes-Gutenberg-University, Mainz, Germany.
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2011 (English)In: International journal of impotence research, ISSN 0955-9930, E-ISSN 1476-5489, Vol. 23, no 5, 206-212 p.Article in journal (Refereed) Published
Abstract [en]

The clitoris contributes to the normal female sexual response cycle. A significance of cyclic guanosine monophosphate (GMP) has been assumed in the control of clitoral vascular smooth muscle. As only a few investigations on the physiology of the vascular and non-vascular clitoral tissue have been carried out, knowledge on the mechanisms controlling this particular female genital organ is still vague. It has been suggested that human clitoral corpus cavernosum smooth muscle is regulated by nitric oxide (NO)/cyclic GMP and related key enzymes, such as NO synthases (NOSs) and the phosphodiesterase type 5 (PDE5). The present study evaluated in the human clitoris, by means of immunohistochemistry, the expression and distribution of key enzymes of the cyclic GMP pathway, such as the endothelial NOS, PDE2, PDE11 and cyclic GMP-dependent protein kinase type I (cGKI) in relation to the PDE5. Immunohistochemistry revealed the presence of PDE2, PDE5 and cGKI in the smooth muscle wall of blood vessels transversing the supepithelial and stromal space. Immunosignals specific for PDE2 were also identified in interstitial-like cells located in the basal epithelial layer. Staining for PDE11A was observed in single nerve trunks located in the clitoral stroma. The results are in favor of a role of the cyclic GMP signaling in the control of clitoral blood flow. It seems likely that PDE2 and PDE11 are also involved in the mechanism of local (neuro)transmission in the clitoris.

Place, publisher, year, edition, pages
Nature Publishing Group, 2011. Vol. 23, no 5, 206-212 p.
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Medical and Health Sciences
Identifiers
URN: urn:nbn:se:liu:diva-77363DOI: 10.1038/ijir.2011.29ISI: 000294948400004PubMedID: 21697861OAI: oai:DiVA.org:liu-77363DiVA: diva2:526546
Available from: 2012-05-14 Created: 2012-05-14 Last updated: 2017-12-07Bibliographically approved

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Hedlund, Petter

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