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Proliferative Assays for B Cell Function

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Abstract or Description:

This unit describes procedures for measuring the capacity of purified B cells to undergo proliferation. The method centers on the use of polyclonal stimulating agents (mitogens) because these agents stimulate the majority of B cells and because the alternative (measurement of antigen-induced proliferation) requires the laborious procedures of isolating antigen-specific B cells (which are otherwise present in too low a concentration in whole B cell populations). Cross-linking of the B cell antigen receptor, surface immunoglobulin (sIg), by specific antigen stimulates cells to proliferate prior to secreting Ig. For this purpose, monoclonal or heterologous affinity-purified anti-Ig antibodies are used. B cells can also be stimulated to proliferate by antigen-nonspecific reagents (mitogens), and it is also critical to study the role of these mitogens in B cell responses. Both of these systems have the advantage that the majority of B cells will be activated. The first basic protocol describes B cell proliferation induced by two commonly used stimulants-?anti-Ig antibody (either anti-IgM or anti-IgD) and lipopolysaccharide (LPS)-?as measured by incorporation of [3H]thymidine into dividing cells. Alternate protocols describe other commonly used mitogens as well as other means of measuring cell proliferation.

Citation: DOI: 10.1002/0471142735.im0312s60
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Posted By: ProtocolFinder on 7/6/2009 4:29:19 PM
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