A role for the melanocortin 4 receptor in sexual function.

Abstract:

:By using a combination of genetic, pharmacological, and anatomical approaches, we show that the melanocortin 4 receptor (MC4R), implicated in the control of food intake and energy expenditure, also modulates erectile function and sexual behavior. Evidence supporting this notion is based on several findings: (i) a highly selective non-peptide MC4R agonist augments erectile activity initiated by electrical stimulation of the cavernous nerve in wild-type but not Mc4r-null mice; (ii) copulatory behavior is enhanced by administration of a selective MC4R agonist and is diminished in mice lacking Mc4r; (iii) reverse transcription (RT)-PCR and non-PCR based methods demonstrate MC4R expression in rat and human penis, and rat spinal cord, hypothalamus, brainstem, pelvic ganglion (major autonomic relay center to the penis), but not in rat primary corpus smooth muscle cavernosum cells; and (iv) in situ hybridization of glans tissue from the human and rat penis reveal MC4R expression in nerve fibers and mechanoreceptors in the glans of the penis. Collectively, these data implicate the MC4R in the modulation of penile erectile function and provide evidence that MC4R-mediated proerectile responses may be activated through neuronal circuitry in spinal cord erectile centers and somatosensory afferent nerve terminals of the penis. Our results provide a basis for the existence of MC4R-controlled neuronal pathways that control sexual function.

authors

Van der Ploeg LH,Martin WJ,Howard AD,Nargund RP,Austin CP,Guan X,Drisko J,Cashen D,Sebhat I,Patchett AA,Figueroa DJ,DiLella AG,Connolly BM,Weinberg DH,Tan CP,Palyha OC,Pong SS,MacNeil T,Rosenblum C,Vongs A,Tang R

doi

10.1073/pnas.172378699

keywords:

subject

Has Abstract

pub_date

2002-08-20 00:00:00

pages

11381-6

issue

17

eissn

0027-8424

issn

1091-6490

pii

172378699

journal_volume

99

pub_type

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