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).
Species | Mouse | Rat | Rabbit | Guinea pig | Hamster | Dog |
Weight (kg) | 0.02 | 0.15 | 1.8 | 0.4 | 0.08 | 10 |
Body Surface Area (m2) | 0.007 | 0.025 | 0.15 | 0.05 | 0.02 | 0.5 |
Km factor | 3 | 6 | 12 | 8 | 5 | 20 |
Animal A (mg/kg) = Animal B (mg/kg) multiplied by | Animal B Km |
Animal A Km |
For example, to modify the dose of Compound A used for a mouse (20 mg/kg) to a dose based on the BSA for a rat, multiply 20 mg/kg by the Km factor for a mouse and then divide by the Km factor for a rat. This calculation results in a rat equivalent dose for Compound A of 10 mg/kg.
Molecular Weight | 594.05 |
Formula | C31H29F2N5O3.HCl |
CAS Number | 957116-20-0 |
Purity | >98% |
Solubility | DMSO 110 mg/mL Ethanol 110 mg/mL |
Storage | at -20°C |
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