Release of nitric oxide by nerve stimulation in the human urogenital tract

Anna M. Leone, N. Peter Wiklund, Tomas Hökfelt, Lou Brundin, Salvador Moncada

Research output: Contribution to journalArticlepeer-review

55 Scopus citations

Abstract

Nerve-induced release of the nitric oxide (NO) breakdown products nitrite (NO2-) and nitrate (NO3-) and the histochemical localization of NO synthase in the human penile corpus cavemosum and urethra were studied. Relaxations induced by nerve stimulation were inhibited by Nω-nitro-L-arginine methyl ester (L-NAME), an effect which was reversed by L-arginine. Relaxations elicited either by nerve stimulation or exogenous NO were accompanied by the appearance of equivalent amounts of NO2- and NO3- over a very similar time course. Nerve-induced release of NO2- and NO3- was inhibited by L-NAME. Histochemical studies showed NADPH diaphorase and NO-positive nerve fibres surrounding the arteries and smooth muscle bundles in the corpus cavernosum and the urethra. The results suggest that NO is a mediator for non-adrenergic non-cholinergic relaxation in the human urogenital tract.

Original languageEnglish
Pages (from-to)733-736
Number of pages4
JournalNeuroReport
Volume5
Issue number6
DOIs
StatePublished - Feb 1994
Externally publishedYes

Keywords

  • NADPH diaphorase
  • Nitric oxide
  • Nitric oxide synthase
  • Non-adrenergic non-cholinergic
  • Penile corpus cavemosum
  • Urethra

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