“The in vivo toxicology of axatilimab was assessed in the cynomolgus monkey, the only toxicology species in which axatilimab binds to CSF-1R and blocks CSF-1-mediated signaling of the receptor.”
✓ VerifiedFDA multi-discipline review, p. 42Source ↗
Why that species
Only toxicology species in which axatilimab binds CSF-1R and blocks CSF-1 signaling
“The in vivo toxicology of axatilimab was assessed in the cynomolgus monkey, the only toxicology species in which axatilimab binds to CSF-1R and blocks CSF-1-mediated signaling of the receptor.”
✓ VerifiedFDA multi-discipline review, p. 42Source ↗
Surrogate molecule
Yes: murine anti-CSF-1R surrogate antibody, used for an investigative mouse acetaminophen hepatotoxicity study
“In addition, an investigative mouse study was conducted, using a surrogate murine anti-CSF-1R antibody, to assess whether administration of an anti-CSF-1R antibody would influence the toxicity induced by a known hepatotoxin”
✓ VerifiedFDA multi-discipline review, p. 42Source ↗
Species: general tox
Cynomolgus monkey only
“The in vivo toxicology of axatilimab was assessed in the cynomolgus monkey, the only toxicology species in which axatilimab binds to CSF-1R and blocks CSF-1-mediated signaling of the receptor.”
✓ VerifiedFDA multi-discipline review, p. 42Source ↗
Species: DART
Not conducted; weight-of-evidence risk assessment submitted instead
“While no animal studies were conducted to assess the reproductive and developmental risks of axatilimab, a WoE-based risk assessment report was submitted.”
✓ VerifiedFDA multi-discipline review, p. 35Source ↗
Species: carcinogenicity
Not conducted; axatilimab is not pharmacologically active in rodents
“Because axatilimab is not active pharmacologically in rodents, conventional carcinogenicity studies in mice or rats are not relevant for axatilimab.”
✓ VerifiedFDA multi-discipline review, p. 52Source ↗
Surrogate used in
Yes: murine anti-CSF-1R surrogate (Ab535) in an investigative mouse acetaminophen hepatotoxicity study
“Ab535, the murine surrogate of axatilimab, did not potentiate the hepatotoxicity of acetaminophen in mice when evaluated in a 14-day hepatotoxicity study (CXR1316).”
✓ VerifiedFDA multi-discipline review, p. 53Source ↗