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- W2019416105 abstract "You have accessJournal of UrologySexual Function/Dysfunction/Andrology: Basic Research1 Apr 2011762 ENOS LOCALIZES TO MYOENDOTHELIAL JUNCTIONS IN THE CORPUS CAVERNOSUM: IMPLICATIONS FOR ERECTILE DYSFUNCTION Gregory Lowe, Adam Straub, Joan Ko, Robin Woodson, Parviz Kavoussi, Raymond Costabile, William Steers, Brant Isakson, and Jeffrey Lysiak Gregory LoweGregory Lowe Charlottesville, VA More articles by this author , Adam StraubAdam Straub Charlottesville, VA More articles by this author , Joan KoJoan Ko Charlottesville, VA More articles by this author , Robin WoodsonRobin Woodson Charlottesville, VA More articles by this author , Parviz KavoussiParviz Kavoussi Austin, TX More articles by this author , Raymond CostabileRaymond Costabile Charlottesville, VA More articles by this author , William SteersWilliam Steers Charlottesville, VA More articles by this author , Brant IsaksonBrant Isakson Charlottesville, VA More articles by this author , and Jeffrey LysiakJeffrey Lysiak Charlottesville, VA More articles by this author View All Author Informationhttps://doi.org/10.1016/j.juro.2011.02.1787AboutPDF ToolsAdd to favoritesDownload CitationsTrack CitationsPermissionsReprints ShareFacebookTwitterLinked InEmail INTRODUCTION AND OBJECTIVES Myoendothelial junctions (MEJs) are cellular extensions through the internal elastic lamina between endothelial cells (EC) and vascular smooth muscle cells (VSMC) that link the membranes of the two cell types. MEJs provide apposition of the EC and VSMC allowing efficient heterocellular communication and gap junction formation. Our group recently reported that a transgenic mouse strain that lacks MEJs has erectile dysfunction (ED) and that after cavernous nerve resection MEJs are lost in the corporal tissue. Endothelial nitric oxide synthase (eNOS) is critical for the generation of nitric oxide (NO) and the erectile response. We now report that eNOS is localized to the MEJs suggesting a targeted release of NO to the VSMC. METHODS Wild-type male C57BL/6 mice between 8–12 weeks of age were studied according to the University of Virginia Animal Care and Use Committee guidelines. Each animal was perfused and penile cavernosal tissue was harvested. Tissues were fixed in 4% paraformaldehyde/0.5% glutaraldehyde and embedded in lowcril white, prior to being sectioned and immunolabeled for eNOS. Images were then obtained on a Joel 1220 transmission electron microscope. RESULTS Electron microscopic imaging of the cavernosal tissue revealed the presence of MEJs. The majority of specific eNOS labeling was localized to the MEJs in the corpus cavernosum. eNOS was only observed occasionally elsewhere in the endothelial cells. CONCLUSIONS eNOS localization to MEJs within the corpus cavernosum provides an efficient means of EC-VSMC communication necessary for the targeted release of NO by the EC. This data also demonstrates that eNOS is not randomly distributed in the EC in the corporal tissue and localization to the MEJs may be necessary for maximal eNOS activation and subsequent NO production and targeted delivery to the VSMC. We are currently exploring if factors influencing eNOS activation also are present in MEJs. Both eNOS and MEJs are critical for the erectile response thus an understanding of their relationship will provide basic knowledge of the mammalian erectile response. © 2011 by American Urological Association Education and Research, Inc.FiguresReferencesRelatedDetails Volume 185Issue 4SApril 2011Page: e306 Advertisement Copyright & Permissions© 2011 by American Urological Association Education and Research, Inc.Metrics Author Information Gregory Lowe Charlottesville, VA More articles by this author Adam Straub Charlottesville, VA More articles by this author Joan Ko Charlottesville, VA More articles by this author Robin Woodson Charlottesville, VA More articles by this author Parviz Kavoussi Austin, TX More articles by this author Raymond Costabile Charlottesville, VA More articles by this author William Steers Charlottesville, VA More articles by this author Brant Isakson Charlottesville, VA More articles by this author Jeffrey Lysiak Charlottesville, VA More articles by this author Expand All Advertisement Advertisement PDF downloadLoading ..." @default.
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- W2019416105 title "762 ENOS LOCALIZES TO MYOENDOTHELIAL JUNCTIONS IN THE CORPUS CAVERNOSUM: IMPLICATIONS FOR ERECTILE DYSFUNCTION" @default.
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