MK-3207 hydrochloride

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Description

MK-3207 hydrochloride is a potent and orally bioavailable calcitonin gene-related peptide (CGRP) receptor antagonist. MK-3207 potently inhibits human α-CGRP-induced cAMP production in HEK293 cells stably expressing human CLR/RAMP1 with an IC50 of 0.12 nM, and maintains similar potency in the presence of 50% human serum with an IC50 of 0.17 nM, indicating that the activity of MK-3207 would not be dramatically affected by plasma protein binding in vivo. MK-3207 displays lower affinity for CGRP receptors from other species, including canine and rodent. MK-3207 produced a concentration-dependent inhibition of dermal vasodilation, with plasma concentrations of 0.8 and 7 nM required to block 50 and 90% of the blood flow increase, respectively. In vitro, MK-3207 is a potent antagonist of the human and rhesus monkey CGRP receptors (K(i) = 0.024 nM).

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