Frontiers in Allergy
Clinical phenotypes, endotypes, and biomarker profiles of immediate rituximab hypersensitivity reactions: a prospective pharmacovigilance study
Background Rituximab (RTX) has been associated with immediate hypersensitivity reactions (HSRs) involving multiple phenotypes and endotypes. Objective To characterize the clinical phenotypes and endotypes of immediate RTX HSRs. Methods A prospective study was conducted as part of a pharmacovigilance program from July 2020 to December 2021. Participants who experienced immediate RTX HSRs were enrolled. Skin testing, basophil activation testing (BAT), IFN- γ ELISpot assays, and IgG anti-drug antibody (ADA) ELISA assa …