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Updated: Jul 18, 2026
Generation of Human CD40-activated B cells
Published on: October 16, 2009
Analysis of CD40-CD40 ligand interactions in the regulation of human B cell function
P E Lipsky1, J F Attrep, A C Grammer
1Harold C. Simmons Arthritis Research Center, University of Texas Southwestern Medical Center at Dallas 75235, USA.
Insights
CD40-CD40 ligand interactions are crucial for T cell and B cell collaboration, regulating B cell activation, proliferation, differentiation, and function. This interaction is vital for antibody production and immune responses.
Area of Science:
- Immunology
- Molecular Biology
- Cellular Biology
Background:
- CD40 and CD40 ligand (CD40L) mediate essential cell-to-cell communication in the immune system.
- These interactions are critical for T cell and B cell collaboration, fundamental to adaptive immunity.
Purpose of the Study:
- To review and expand the understanding of CD40-CD40 ligand interactions in T cell/B cell collaboration.
- To highlight the multifaceted roles of CD40-CD40 ligand in regulating B cell functions and T cell activity within germinal centers.
Main Methods:
- Review of existing scientific literature and data.
- Analysis of the regulatory roles of CD40 and CD40L in immune cell function.
Main Results:
- CD40-CD40 ligand interactions govern B cell activation, proliferation, differentiation, and isotype switching.
- CD40L expressed by B cells facilitates responses of maturing B cells in germinal centers.
- CD40 expressed by T cells regulates helper T cell function within germinal centers.
Conclusions:
- Emerging data reveal expanded roles for CD40-CD40 ligand interactions in T cell/B cell collaboration.
- This signaling pathway is a key regulator of both T and B cell functions involved in antibody production.
Abstract:
CD40-CD40 ligand interactions play an essential role in T cell/B cell collaboration. The data presented in this review have served to widen the scope of CD40-CD40 ligand interactions to include initial activation, proliferation, differentiation, and isotype switching of B cells, as well as subsequent downregulation of B cell function. Moreover, CD40 ligand expression by activated B cells is likely to play an essential role in facilitating ongoing responses of stimulated B cells maturing in germinal centers. Finally, CD40 expression by activated T cells may also play an important role in regulating the function of helper T cells within germinal centers. In summary, emerging data have expanded the role of CD40-CD40 ligand interaction during T cell/B cell collaboration and have emphasized its potential to regulate many of the functions of both partners in this essential interaction involved in antibody production.
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