efgartigimod alfa   Click here for help

GtoPdb Ligand ID: 9777

Synonyms: ARGX-113 | efgartigimod alfa-fcab | Vyvgart®
Approved drug Immunopharmacology Ligand
efgartigimod alfa is an approved drug (FDA (2021), EMA (2022))
Compound class: Antibody
Comment: Efgartigimod alfa (ARGX-113) is a first-in-class antibody fragment designed for the treatment of patients with severe autoimmune diseases associated with high levels of pathogenic immunoglobulin G (IgG) autoantibodies [6]. It binds to the IgG receptor, major histocompatibility complex class I-like Fc receptor (FcRn, the protein product of the FCGRT gene). Efgartigimod alfa inactivates FcRn's IgG binding ability (the FcRn-IgG interaction normally protects IgG from degradation) thus facilitating accelerated catabolism of native pathogenic autoantibodies [3,5]. The mechanism of this drug action is discussed more comprehensively in Roopenian and Akilesh (2007) [4] and Vaccaro et al. (2005) [7].
Selectivity at other protein targets
Key to terms and symbols Click column headers to sort
Target Sp. Type Action Value Parameter Concentration range (M) Reference
Fc fragment of IgG receptor and transporter Hs Antibody Binding - - - 6
⤷ [6]