PMID: 2503562Jul 26, 1989Paper

Quantitation of the anaphylatoxin C3a in the presence of C3 by a novel sandwich ELISA using monoclonal antibody to a C3a neoepitope

Journal of Immunological Methods
G ZilowR Burger

Abstract

C3a levels in plasma are usually measured by a competitive inhibition radioimmunoassay (RIA) using 125I-labelled C3a-desArg and antibodies to C3a capable of detecting C3a determinants which are also present on the native C3. Therefore, prior to the assay native, non-cleaved C3 has to be removed completely from the C3a-containing sample by precipitation. We developed a new rapid two-site sandwich ELISA system for the quantitation of C3a-desArg in plasma. This immunoassay uses a monoclonal antibody (mAb H466) reacting with C3a-desArg but not with C3. The reactivity of mAb H466 with a neoantigenic determinant of C3a-desArg permitted the direct quantitation of C3a-desArg without removal of C3 from the sample. The mAb H466 was used as a capture antibody and bound C3a-desArg was detected with a second peroxidase-labelled anti-C3a mAb. The lower limit of detection of C3a-desArg in this ELISA was 1 ng/ml. The C3a-desArg levels measured in the plasma samples of various patients were found to differ over a wide range. A good correlation was observed between the results obtained in the RIA and those obtained in the ELISA (r = 0.95). High levels of C3a-desArg were detected in plasma from patients with multiple trauma and patients undergoin...Continue Reading

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Citations

Jan 4, 1993·Journal of Immunological Methods·J M PorcelD Vergani
Sep 1, 1992·Immunopharmacology·M OppermannO Götze
Jan 28, 2014·Scandinavian Journal of Immunology·A S GrumachM Kirschfink
Jul 4, 2008·PloS One·Hendrik P N SchollMartin Oppermann
Jan 23, 2002·Gene Therapy·G CichonR Burger
Jan 5, 1999·Clinical and Diagnostic Laboratory Immunology·T D JaskowskiH R Hill
Sep 1, 1995·Clinical and Diagnostic Laboratory Immunology·A E Ahmed, J B Peter

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