title: Intracavernosal endothelin levels of impotent men before and after papaverine induced penile erection.
abstract: OBJECTIVE
  Endothelin and nitric oxide (NO) are modulating factors of vascular tonus. Recent data have given support to the assumption that penile erection is the consequence of competition of vasodilator NO and vasoconstrictor endothelin on penis. Reported that atherosclerotic vascular disease is presented with increased endothelin and decreased NO release, this study was designed to search for a similar endothelin alteration in corpus cavernosum of penis.
  
  
  METHODS
  Intracavernosal entothelin levels of 33 important men with arteriogenic impotence before and after papaverine-induced penile erection were examined by using radioimmunoassay kits.
  
  
  RESULTS
  The intracavernosal endothelin levels of arteriogenic impotent men in our study were not altered both in the flaccid and papaverine-induced erectile state.
  
  
  CONCLUSIONS
  The lack of alteration was concluded to be the possible result of cavernosal damage in arteriogenic impotence leading to diminished release of NO and increased release of endothelin.
authors.affiliation: Department of Urology, Medical Faculty of Istanbul, Istanbul University, Turkey.
authors.forename: A
authors.initials: A
authors.lastname: Kadioğlu
authors.forename: K
authors.initials: K
authors.lastname: Memişoğlu
authors.forename: O
authors.initials: O
authors.lastname: Sazoya
authors.forename: E
authors.initials: E
authors.lastname: Tüzün
mesh_terms: D000328:Adult; D000368:Aged; D016232:Endothelins / Q000097:blood*; D006801:Humans; D018783:Impotence, Vasculogenic / Q000097:blood*; D008297:Male; D008875:Middle Aged; D009569:Nitric Oxide / Q000097:blood; D010208:Papaverine / Q000627:therapeutic use*; D010410:Penile Erection / Q000187:drug effects*; D010413:Penis / Q000098:blood supply; D011863:Radioimmunoassay; D014665:Vasodilator Agents / Q000627:therapeutic use*
chemical_list: D016232:Endothelins; D014665:Vasodilator Agents; D009569:Nitric Oxide; D010208:Papaverine