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Antigen-induced changes in B cell subsets in lymph nodes: analysis by dual fluorescence flow cytofluorometry
European Journal of Immunology
|July 1, 1986
Summary
B cells increase in lymph nodes after immunization, forming germinal centers. Antigen-specific B cells then selectively differentiate within these centers, indicating non-specific B cell recruitment.
Area of Science:
- Immunology
- Cell Biology
Background:
- B cell subsets in lymph nodes undergo changes following antigen stimulation.
- Germinal centers are crucial structures for adaptive immune responses.
Purpose of the Study:
- To analyze changes in B cell subset representation and surface phenotype in murine lymph nodes after immunization.
- To investigate the characteristics of early germinal center cells.
Main Methods:
- Two-color immunofluorescence fluorocytometric analysis of murine lymph nodes.
- Analysis of B cell surface markers (IgM, IgD, Peanut Agglutlutinin, MEL-14, I-A, H-2K, ThB) and antigen binding.
Main Results:
- A rapid increase in IgM+, IgD+ B cells and germinal center formation post-immunization.
- Early germinal center cells exhibit distinct surface phenotypes (PNA-high, low IgM, no IgD, MEL-14 negative) and higher I-A and H-2K antigen levels.
- Germinal center cells contain the majority of antigen-binding cells, with decreasing H-2K antigen levels over time.
Conclusions:
- B cells are non-specifically recruited to antigen-stimulated lymph nodes.
- Antigen-specific B cells are selectively involved in germinal center formation and differentiation.