Multiplexed serum measurement of IgG, IgA, IgM, and IgE antibody responses to therapeutic biologicals.
Analytical methods characterizing the immunogenicity of therapeutic proteins are useful for monitoring, characterizing and predicting reactions to biopharmaceuticals. A multiplexed assay capable of isotyping the specific IgG, IgA, IgM and IgE (IgGAME) antibody responses against a biotherapeutic was demonstrated in a hyper-immunized cynomolgus monkey, over a 15-month period. The quantitative range of the antibody measurements was determined to be 15 ng/ml to 50 ng/ml in 10% serum. By the use of any biotinylated or fluorescently tagged therapeutic as a detector, this multiplexed isotyping assay can be broadly applied to human and non-human primate IgG, IgA, IgM and IgE immunogenicity studies.
McCutcheon
Krista
K
BioAnalytical Research and Development, Genentech, Inc., South San Francisco, CA, USA. Krista@gene.com
O'Hara
Edward
E
Fei
David
D
D000818:Animals; D000911:Antibodies, Monoclonal / Q000276:immunology; D061067:Antibodies, Monoclonal, Humanized; D000918:Antibody Specificity; D018845:CD11 Antigens / Q000276:immunology; D007114:Immunization; D007070:Immunoglobulin A / Q000097:blood; D007073:Immunoglobulin E / Q000097:blood; D007074:Immunoglobulin G / Q000097:blood; D007132:Immunoglobulin Isotypes / Q000097:blood*; D007075:Immunoglobulin M / Q000097:blood; D008252:Macaca fascicularis / Q000097:blood*; D008863:Microspheres; D023421:Models, Animal; D011994:Recombinant Proteins / Q000276:immunology; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D012698:Serologic Tests / Q000379:methods*
D000911:Antibodies, Monoclonal; D061067:Antibodies, Monoclonal, Humanized; D018845:CD11 Antigens; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D007132:Immunoglobulin Isotypes; D007075:Immunoglobulin M; D011994:Recombinant Proteins; D007073:Immunoglobulin E; C472181:efalizumab