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Measurements of Physiological Stress Responses in C. Elegans
Published on: May 21, 2020
Evolution of heat shock protein and immunity
1Department of Microbiology and Immunology, University of Rochester Medical Center, Box 672 601, Elmwood Avenue, Rochester, NY 14642, USA. robert@uhura.cc.rochester.edu
Developmental and Comparative Immunology
|April 17, 2003
Summary
Heat shock proteins (hsps) are abundant intracellular proteins that play a crucial role in cellular stress response. These proteins can stimulate immune responses by signaling danger and presenting antigens, suggesting an ancient role in immunity.
Area of Science:
- Immunology
- Cell Biology
- Evolutionary Biology
Background:
- Heat shock proteins (hsps) are highly abundant intracellular proteins.
- Their synthesis increases rapidly under various stressors like temperature changes, glucose deprivation, infection, and cancer.
Purpose of the Study:
- To explore the multifaceted roles of hsps in cellular processes and immune signaling.
- To investigate the evolutionary origins and conserved functions of hsps in immunity.
Main Methods:
- Analysis of hsps' ability to associate with and chaperone peptides.
- Investigation of hsps' internalization by antigen-presenting cells (APCs) via receptor-mediated endocytosis.
- Examination of hsps' role in activating inflammatory pathways (NF-kappaB) and modulating immune responses.
Main Results:
- Hsps chaperone various cellular peptides and can be internalized by APCs.
- Hsps facilitate the presentation of antigenic peptides in the MHC class I pathway.
- Extracellular hsps act as danger signals, stimulating inflammatory cytokines and co-stimulatory molecules.
Conclusions:
- Hsps possess multiple functions including peptide binding, immune cell interaction, and immune signaling.
- The ancient origins and conserved structure of hsps suggest a fundamental and early role in the evolution of immunity.
- Studies in Xenopus frogs support the proposition that hsps have played a widespread role in immunity across diverse organisms.
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