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Published on: September 14, 2016
Antigen-specific chemotaxis of B cells
M Komai-Koma1, A M Donachie, P C Wilkinson
1Department of Immunology, University of Glasgow (Western Infirmary), UK.
Immunology
|August 1, 1997
Summary
B cells from immunized mice show chemoattractant responses to specific protein antigens like ovalbumin (OVA). This antigen-specific B cell migration is enhanced by interleukin-4 (IL-4) and involves activated, cell-cycle-engaged B cells.
Area of Science:
- Immunology
- Cell Biology
Background:
- B cells play a crucial role in adaptive immunity by recognizing antigens.
- Understanding B cell migration is key to deciphering immune responses.
Purpose of the Study:
- To investigate the chemoattractant properties of soluble protein antigens for B cells from immunized mice.
- To determine the specificity and characteristics of antigen-induced B cell locomotion.
Main Methods:
- Mice were immunized with ovalbumin (OVA) using different routes (footpad or intraperitoneal).
- B cells were isolated from spleens and lymph nodes 8-14 days post-immunization.
- In vitro locomotor responses were assessed using polarization and filter assays, with and without overnight culture with interleukin-4 (IL-4).
Main Results:
- Immunized B cells, but not control cells, exhibited locomotor responses to OVA.
- Responses were antigen-specific, with OVA-immunized B cells responding to OVA but not BSA, and vice versa.
- Interleukin-4 (IL-4) enhanced the antigen-induced B cell response.
- Checkerboard assays indicated a chemotactic response to OVA.
- Responsive B cells were larger, suggesting activation and cell cycle entry.
Conclusions:
- Soluble protein antigens can chemoattract B cells from immunized mice.
- The chemoattractant response is antigen-specific and enhanced by IL-4.
- Activated B cells that have entered the cell cycle are likely responsible for this migratory behavior.
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