Phosphodiesterase type 5 inhibitors: molecular pharmacology and interactions with other phosphodiesterases.

Abstract:

:Erectile function is determined by tight regulation of relaxation or contraction of corpus cavernosal smooth muscle, which is the result of a long and complex chain of molecular events. Control of erectile function resides in signaling pathways of the central and peripheral nervous system, as well as intracellular events in the penile smooth muscle. Vascular events resulting in erection have long been understood, and the role of the signaling pathways of the central and peripheral nervous systems in erectile function and dysfunction has become increasingly clear over the last decade. This knowledge has led to the development and current availability of effective oral treatments for erectile dysfunction, the selective phosphodiesterase type 5 (PDE5) inhibitors-sildenafil, vardenafil and tadalafil. In the past few years we have seen an elucidation of the molecular events involved in erectile function and dysfunction and the detailed mechanisms of action by which the specific PDE5 inhibitors work. A review of those mechanisms helps to explain the success of the currently available PDE5 inhibitors and the differences between them and suggests new approaches for developing potential future novel therapies or refinements to existing structures that may improve their efficacy, selectivity and safety profiles.

journal_name

Curr Pharm Des

authors

Seftel AD

doi

10.2174/138161205774913426

subject

Has Abstract

pub_date

2005-01-01 00:00:00

pages

4047-58

issue

31

eissn

1381-6128

issn

1873-4286

journal_volume

11

pub_type

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