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Updated: Jul 3, 2026
09:47
Generation of Human Alloantigen-specific T Cells from Peripheral Blood
Published on: November 21, 2014
T-cells behaving badly: structural insights into alloreactivity and autoimmunity
Lauren K Ely1, Scott R Burrows, Anthony W Purcell
1Department of Molecular and Cellular Physiology, Stanford University School of Medicine, Stanford, CA 94305, USA.
Current Opinion in Immunology
|August 6, 2008
Summary
T-cells recognize foreign peptides presented by MHC molecules. This review explores structural insights into T-cell receptor interactions in transplantation and autoimmunity.
Area of Science:
- Immunology
- Structural Biology
- Transplantation Science
Background:
- T-cells are crucial for adaptive immunity, recognizing foreign peptide-MHC (pMHC) complexes.
- Unwanted T-cell receptor (TCR) interactions can cause allograft rejection and autoimmunity.
- Alloreactivity occurs directly via allogeneic MHC or indirectly via self-MHC presenting allogeneic peptides.
Purpose of the Study:
- To review recent structural data on T-cell alloreactivity and auto-reactivity.
- To discuss the implications of these interactions for transplant rejection and autoimmune diseases.
Main Methods:
- Review of existing structural data on TCR-pMHC interactions.
- Analysis of mechanisms underlying direct and indirect alloreactivity.
- Comparison of auto-reactive TCR interactions with cognate pMHC interactions.
Main Results:
- Structural insights reveal diverse modes of TCR engagement in alloreactivity, including molecular mimicry.
- Auto-reactive TCRs appear to interact distinctly from those recognizing cognate pMHC.
- Understanding these structural differences is key to T-cell mediated pathologies.
Conclusions:
- Structural biology provides critical insights into T-cell mediated transplant rejection and autoimmunity.
- Further research into TCR-pMHC interactions can inform therapeutic strategies for immune disorders.
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