Suppression of CGRP-induced facial blood flow in cynomolgus monkeys; in vitro receptor binding
“An in vivo pharmacology study indicated suppression of CGRP-induced facial blood flow in monkeys without vasoconstrictive effects on coronary or cerebral arteries (as measured by laser doppler).”
✓ VerifiedFDA pharmacology/toxicology review, p. 9Source ↗
Why that model
CGRP receptor affinity ~10,000-fold lower in dog, rabbit and rat; similar in cynomolgus monkey
“In vitro primary pharmacology studies indicated similar affinity of BHV-3500 for human and cynomolgus monkey CGRP receptors; however, affinity was approximately 10,000-fold lower for dog, rabbit, and rat CGRP.”
✓ VerifiedFDA pharmacology/toxicology review, p. 9Source ↗
Reviewer's view of the efficacy data
FDA: in vitro and in vivo studies characterize zavegepant as a selective CGRP receptor antagonist (IC50 0.04 nM)
“The results of in vitro and in vivo studies characterize zavegepant as a calcitonin gene-related peptide (CGRP) receptor antagonist (IC50 of 0.04 nM), with selectivity for CGRP compared to other members of the calcitonin receptor family”
✓ VerifiedFDA pharmacology/toxicology review, p. 2Source ↗