Lymphoid tissue changes not considered an immunotoxicity risk; no dedicated immunotoxicity studies
“It is further clarified that adagrasib-induced microscopic changes in lymphoid tissues, do not appear to translate into an immunotoxicity risk is supported. Omission of specific immunotoxicity studies is therefore accepted.”
Distributed to nearly all rat tissues by 8 h; affinity for melanin-pigmented tissues
“Following single oral administration to rats, 14C-adagrasib-derived radioactivity distributed to nearly all tissues by 8 hours post-dose. Adagrasib demonstrated affinity for melanin-pigmented tissues.”
✓ VerifiedFDA multi-discipline review, p. 42Source ↗
Modality-specific risk
Phospholipidosis (macrophage infiltration and vacuolation) in multiple tissues
“Toxicology studies of up to 13 weeks duration in both species revealed microscopic findings of macrophage infiltration and vacuolation in several tissues, suggestive of phospholipidosis”
✓ VerifiedFDA multi-discipline review, p. 42Source ↗