Modulation of Soluble Guanylate Cyclase for the Treatment of Erectile Dysfunction
| Autor: | George F. Lasker, Philip J. Kadowitz, Edward A. Pankey |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Male
inorganic chemicals medicine.medical_specialty Physiology Morpholines Nitric Oxide medicine.disease_cause Nitric oxide chemistry.chemical_compound Mediator Erectile Dysfunction Internal medicine medicine Humans heterocyclic compounds Cyclic GMP chemistry.chemical_classification business.industry Penile Erection CGMP formation Phosphodiesterase 5 Inhibitors medicine.disease Pathophysiology Pyrimidines Treatment Outcome Erectile dysfunction Endocrinology Enzyme chemistry Guanylate Cyclase cardiovascular system business Oxidative stress circulatory and respiratory physiology Guanylate cyclase |
| Zdroj: | Physiology. 28:262-269 |
| ISSN: | 1548-9221 1548-9213 |
| Popis: | Nitric oxide (NO) is the principal mediator of penile erection, and PDE-5 inhibitors are the first-line agents used to treat erectile dysfunction (ED). When NO formation or bioavailability is decreased by oxidative stress and PDE-5 inhibitors are no longer effective, a new class of agents called soluble guanylate cyclase (sGC) stimulators like BAY 41-8543 will induce erection. sGC stimulators bind to the normally reduced, NO-sensitive form of sGC to increase cGMP formation and promote erection. The sGC stimulators produce normal erectile responses when NO formation is inhibited and the nerves innervating the corpora cavernosa are damaged. However, with severe oxidative stress, the heme iron on sGC can be oxidized, rendering the enzyme unresponsive to NO or sGC stimulators. In this pathophysiological situation, another newly developed class of agents called sGC activators can increase the catalytic activity of the oxidized enzyme, increase cGMP formation, and promote erection. The use of newer agents that stimulate or activate sGC to promote erection and treat ED is discussed in this brief review article. |
| Databáze: | OpenAIRE |
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