PT-141: a melanocortin agonist
for the treatment of sexual dysfunction
Molinoff PB, Shadiack AM, Earle D, Diamond LE, Quon CY.
Palatin Technologies, Inc, Cranbury,
New Jersey 08512, USA.
Ann N Y Acad Sci. 2003 Jun; 994: 96-102
ABSTRACTPT-141, a synthetic peptide analogue of alpha-MSH, is an agonist at melanocortin receptors including the MC3R and MC4R, which are expressed primarily in the central nervous system. Administration of PT-141 to rats and nonhuman primates results in penile erections. Systemic administration of PT-141 to rats activates neurons in the hypothalamus as shown by an increase in c-Fos immunoreactivity. Neurons in the same region of the central nervous system take up pseudorabies virus injected into the corpus cavernosum of the rat penis. Administration of PT-141 to normal men and to patients with erectile dysfunction resulted in a rapid dose-dependent increase in erectile activity. The results suggest that PT-141 holds promise as a new treatment for sexual dysfunction.
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