Fischinger S, Fallon JK, Michell AR, Broge T, Suscovich TJ, Streeck H, Alter G. A high-throughput, bead-based, antigen-specific assay to assess the ability of antibodies to induce complement activation.
J Immunol Methods 2019;
473:112630. [PMID:
31301278 PMCID:
PMC6722412 DOI:
10.1016/j.jim.2019.07.002]
[Citation(s) in RCA: 134] [Impact Index Per Article: 26.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2018] [Revised: 05/21/2019] [Accepted: 07/08/2019] [Indexed: 12/14/2022]
Abstract
The complement system plays a critical role in innate immune defense against pathogens, both via non-specific direct pathogen recognition and killing or via antigen-specific indirect recruitment by complement fixing antibodies. While various assays for measuring complement activation have been developed, few provide a high-throughput, sample-sparing approach to interrogate the qualitative differences in the ability of antibodies to drive complement activation. Here we present a high-throughput, sample-sparing, bead-based assay to evaluate antigen-specific antibody-dependent complement activation against nearly any antigen. Optimization of buffer composition, kinetics of immune complex formation, as well as complement source all contribute critically to the development of a robust, highly flexible and high-throughput approach to analyze antibody-dependent complement deposition (ADCD). Thus, the optimized bead-based, antigen-specific assay represents a simple, highly adaptable platform to profile antibody-dependent complement activation across pathogens and diseases.
Optimized flow-based assay for the detection of antibody-mediated complement deposition
Robust, rapid and reproducible high-throughput bead-based assay applicable to various diseases, including HIV and influenza
Lot controlled complement is a controlled source for exogenous complement that correlates with human complement activity
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