No effect on hematology, immunophenotyping, TDAR, immune tissue histopathology or T/B-cell distribution in monkeys or offspring
“Guselkumab treatment had no effect on hematology, immunophenotyping, TDAR to KLH, histopathology of immune tissues, or T- and B-cell distribution in monkeys or their offspring.”
Transplacental transfer to infants; milk below quantifiable concentration
“Guselkumab exposure in infants was likely a result of transplacental distribution, as milk samples were below the lowest quantifiable concentration for guselkumab.”
✓ VerifiedFDA multi-discipline review, p. 71Source ↗
Modality-specific risk
Infection risk: IL-23 contributes to immunity against bacterial and fungal pathogens
“IL-23 may contribute to immunity for a variety of bacterial and fungal pathogens, as assessed in animal models of these infections which has been reported in literature.”
Immunogenic in guinea pigs and monkeys; ADA in only 2 of 90 monkeys (2.2%)
“Guselkumab was immunogenic in both guinea pigs and monkeys, as expected for a human mAb. ADA were detected in only 2 (2.2%) of 90 monkeys treated with guselkumab, one after a single 50 mg/kg IV dose of guselkumab and one pregnant female and her infant in the ePPND study receiving 10 mg/kg/week SC guselkumab.”
Psoriasis: ~6% ADA up to Week 52; ~7% of these neutralizing
“Up to Week 52, approximately 6% of adult subjects treated with TREMFYA developed antidrug antibodies. Of the subjects who developed antidrug antibodies, approximately 7% had antibodies that were classified as neutralizing antibodies.”
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