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Rapid and Robust Analysis of Cellular and Molecular Polarization Induced by Chemokine Signaling
Published on: December 12, 2014
Developmental stage-specific shift in responsiveness to chemokines during human B-cell development
Marek Honczarenko1, Aleksandra M Glodek, Marcin Swierkowski
1Joint Program in Transfusion Medicine, Children's Hospital Boston, Harvard Medical School, Boston, MA 02115, USA.
Experimental Hematology
|July 26, 2006
Summary
Chemokines guide B-cell development in bone marrow. Late-stage B cells respond to specific chemokines, while inflammation can alter early B-cell chemokine receptor expression, influencing their migration.
Area of Science:
- Immunology
- Cell Biology
Background:
- Chemokines are crucial for immune cell trafficking.
- B-cell development occurs within the bone marrow microenvironment.
- Understanding chemokine roles is key to immune regulation.
Purpose of the Study:
- To investigate chemokine receptor expression and function during human B-cell development.
- To determine how inflammatory conditions affect B-cell chemokine responses.
Main Methods:
- Analyzed chemokine receptor expression and migration of distinct B-cell subsets (pro-B, pre-B, immature, mature).
- Utilized human pre-B 697 cells to assess the impact of inflammatory agents (e.g., TNF-alpha) on chemokine receptor expression and function.
Main Results:
- All B-cell subsets migrated towards CXCL12.
- Late-stage B cells (immature, mature) responded to CCL19, CCL21, CXCL13, and CCL20, correlating with receptor expression.
- Inflammation (TNF-alpha) upregulated CCR7 and CXCR5 on pre-B cells, enabling chemotaxis to CCL19 and CXCL13.
Conclusions:
- CXCR5, CCR7, and CCR6 are implicated in late-stage B-cell bone marrow trafficking and egress.
- Inflammation-induced CCR7 and CXCR5 expression may promote early B-cell exit from bone marrow to secondary lymphoid organs.
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