Transient cytokine increases (TNF, IL-6, IL-10, IFN-gamma) in chimpanzees; slight IL-6/IL-12 rise with surrogate in mice; anaphylaxis on intermittent surrogate dosing
“At both doses evaluated, slight increases (<3.5-fold) in IL-6 and IL-12 levels were evident, consistent with the release of cytokines seen following treatment of chimps with teplizumab.”
✓ VerifiedFDA pharmacology/toxicology review, p. 57Source ↗
Biodistribution & persistence
Human TCR: staining restricted to T-cell regions of spleen, lymph nodes, MALT and thymus; no B-region staining
“Staining of lymphoid cells in B regions or non-T regions of lymphoid tissues was not observed.”
✓ VerifiedFDA pharmacology/toxicology review, p. 55Source ↗
In vitro whole-blood cytokine release far below alemtuzumab/TGN1412 controls; no effects on monkey TDAR, lymphocyte subsets or serum cytokines; ADA in some monkeys