Recognition of heat shock proteins and gamma delta cell function

Area of Science:

• Immunology
• Microbiology

Background:

• Gamma delta (γδ) T cells are a distinct lymphocyte subset with roles in innate and adaptive immunity.
• Accumulating evidence suggests γδ T cells are involved in the immune response against mycobacteria, including Mycobacterium bovis.

Purpose of the Study:

• To review and discuss recent findings on the role of gamma delta cells in the immune response to mycobacteria.
• To explore the potential in vivo function of gamma delta cells based on their recognition of mycobacterial heat shock proteins.

Main Methods:

• Literature review and synthesis of recent research findings.
• Focus on studies involving mouse and human gamma delta cell lines and their reactivity to mycobacterial antigens.

Main Results:

• Many mouse γδ T cells are stimulated by the 65 kDa heat shock protein (HSP) of M. bovis.
• Human γδ cell lines reactive to this mycobacterial HSP have been identified.
• Indirect evidence indicates γδ T cells can recognize autologous heat shock proteins.

Conclusions:

• Gamma delta cells likely play a significant role in the immune response to mycobacteria.
• The recognition of heat shock proteins by γδ T cells may be crucial for their function in vivo.
• Further investigation is warranted to fully elucidate the in vivo importance of γδ T cell-mediated immunity against mycobacterial infections.