Dose- and duration-dependent lymphocyte decreases in two mouse strains
“The most clinically relevant finding was dose- and duration-dependent decreases in lymphocytes, which was consistently observed in two mouse strains.”
✓ VerifiedFDA multi-discipline review, p. 192Source ↗
Biodistribution & persistence
Strong melanin binding (uveal tract) in pigmented rats; crosses placenta with significant fetal exposure
“ISL also demonstrated strong affinity for melanin-containing tissues (e.g., uveal tract) in pigmented rats and readily crossed the placental barrier in pregnant rats, resulting in significant fetal exposure.”
✓ VerifiedFDA multi-discipline review, p. 206Source ↗
Modality-specific risk
Lymphocyte decreases; the clinical lymphocyte-effect dose gives ~25-fold higher ISL-TP exposure than the recommended dose
“An in vitro PK/PD model using human PBMCs established that the clinical dose associated with lymphocyte decreases (0.75 mg QD) corresponds to an ISL-TP exposure approximately 25-fold higher than the RHD.”
✓ VerifiedFDA multi-discipline review, p. 192Source ↗