Corpus cavernosum smooth muscle cell (CCSMC)

The **corpus cavernosum smooth muscle cell** is a major cellular component of the penile erectile tissue. Relaxation of these smooth muscle cells is required for penile erection, enabling blood to fill the sinusoids, compress the subtunical venules, and thereby cause tumescence. This relaxation is mediated by several signaling pathways, most notably the nitric oxide (NO)/cGMP and prostaglandin (cAMP) pathways, as well as by hyperpolarization through potassium channels and potentially by other mediators including Rho-kinase pathways. Drugs for erectile dysfunction commonly target these mediators (PDE5 inhibitors, prostaglandins, NO donors). Directly, "corporal cavernosal smooth muscle tissue relaxation" is not a molecular drug target, but the underlying molecular effectors are well-validated targets for ED therapy[3][5][6][2][4].

Other names

Cavernosal smooth muscleCavernous smooth muscle cellCCSMPenile trabecular smooth muscle

Inhibition of phosphodiesterase type 5 increases cGMP, causing relaxation; Nitric oxide donors stimulate guanylyl cyclase → cGMP pathway; Prostaglandin E1 analogs increase cAMP via Gs-coupled receptors; Rho-kinase inhibitors decrease contractile tone by affecting calcium sensitization; β-adrenergic agonists increase cAMP leading to relaxation