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- W2098917526 abstract "Erectile dysfunction (ED) is a highly prevalent and often under-treated condition. Erection is basically a spinal reflex that can be initiated by recruitment of penile afferents but also by visual, olfactory and imaginary stimuli. The generated nervous signals will influence the balance between contractile and relaxant factors, which control the degree of contraction of penile corporal cavernosal smooth muscles and, thus, determine the erectile state of the penis. The different steps involved in neurotransmission, impulse propagation and intracellular transduction of neural signals may be changed in different types of ED. Recent studies have revealed important roles for the small GTPase RhoA and its effector, Rho-kinase in regulating cavernosal smooth muscle tone. The RhoA/Rho-kinase pathway modulates the level of phosphorylation of the myosin light chain, mainly through inhibition of myosin phosphatase, and contributes to agonist-induced Ca(2+)-sensitization in smooth muscle contraction. Changes in this pathway may contribute to ED in various patient subgroups (e.g. hypertension, diabetes, hypogonadism). This review summarizes the importance of Rho-kinase signaling in the erectile response and introduces the evidence pointing to RGS-containing Rho-guanine nucleotide exchange factors (GEFs) as critical mediators of RhoA-GTPase activation in cavernosal smooth muscle and its possible compartmentalization in the caveolae. In addition, we suggest that the design of selective inhibitors of these GEFs might represent a novel class of pharmacological agents to treat ED." @default.
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- W2098917526 date "2005-12-01" @default.
- W2098917526 modified "2023-09-23" @default.
- W2098917526 title "Rho-Kinase and RGS-Containing RhoGEFs as Molecular Targets for the Treatment of Erectile Dysfunction" @default.
- W2098917526 doi "https://doi.org/10.2174/138161205774913390" @default.
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