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Isolation of Labile Multi-protein Complexes by in vivo Controlled Cellular Cross-Linking and Immuno-magnetic Affinity Chromatography
Published on: March 10, 2010
A modified microcomplement fixation test for antigen or antibody determination in soluble immune complexes, using gel
Immunological Communications
|January 1, 1984
Summary
A Modified Microcomplement Fixation Test (MMFT) enhances immune complex (IC) detection and quantification. This sensitive method accurately measures ICs in various samples without interference from free antigens or antibodies.
Area of Science:
- Immunology
- Biochemistry
- Analytical Chemistry
Background:
- Soluble immune complexes (ICs) play roles in various physiological and pathological processes.
- Accurate detection and quantification of ICs are crucial for understanding their involvement in disease.
- Existing methods may face limitations in sensitivity or specificity, or be affected by free antigens/antibodies.
Purpose of the Study:
- To describe a Modified Microcomplement Fixation Test (MMFT) for sensitive and reproducible detection and quantification of soluble immune complexes (ICs).
- To adapt MMFT for analyzing IC profiles in chromatographic separations.
- To demonstrate the ability of MMFT to detect non-complement fixing ICs and avoid interference from free antigen (Ag) or antibody (Ab).
Main Methods:
- The MMFT involves adding excess specific antibody to immune complexes to enhance their anticomplementarity.
- Quantification is based on the sample dilution required to fix 50% of the added complement.
- The method was applied to analyze IC profiles obtained both in vivo and in vitro.
Main Results:
- The MMFT demonstrated high sensitivity and good reproducibility in detecting and quantifying ICs.
- The assay successfully analyzed IC profiles from various biological sources.
- MMFT effectively detected non-complement fixing ICs and was unaffected by the presence of free antigen or antibody.
Conclusions:
- The Modified Microcomplement Fixation Test (MMFT) provides a sensitive, reproducible, and specific method for detecting and quantifying soluble immune complexes.
- MMFT is a valuable tool for analyzing ICs in chromatographic separations and biological samples.
- This assay overcomes limitations of previous methods by accurately measuring ICs without interference from free components.
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