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Biology of T memory type 1 cells
N Anfossi1, V Pascal, E Vivier
1Centre d'Immunologie de Marseille-Luminy, CNRS-INSERM-Univ. Med., Marseille, France.
Immunological Reviews
|August 22, 2001
Summary
Inhibitory natural killer cell receptors (NKR) on T cells prevent self-destruction and promote survival. Sensing self-MHC class I molecules via NKR causes T memory type 1 (Tm1) cell accumulation.
Area of Science:
- Immunology
- Cell Biology
- T cell biology
Background:
- Inhibitory natural killer cell receptors (NKR) bind to MHC class I molecules, regulating NK cell activity.
- While NKR function on NK cells is established, their role on T cells is less understood.
- A subset of CD8+ T cells, termed T memory type 1 (Tm1) cells, express inhibitory NKR.
Purpose of the Study:
- To elucidate the biological function of inhibitory NKR on T cells.
- To review the phenotypic and functional characteristics of Tm1 cells.
- To investigate the role of inhibitory NKR in T cell survival and self-tolerance.
Main Methods:
- In vitro studies on T cell cultures.
- In vivo analyses in animal models.
- Phenotypic and functional characterization of Tm1 cells.
Main Results:
- Inhibitory NKR engagement on T cells provides survival signals, protecting against activation-induced cell death.
- Engagement of inhibitory NKR on T cells is involved in peripheral T cell self-tolerance.
- Recognition of self-MHC class I by NKR on T cells leads to Tm1 cell accumulation in vivo.
Conclusions:
- Inhibitory NKR on T cells play a crucial role in T cell survival and homeostasis.
- Tm1 cells, defined by inhibitory NKR expression, accumulate due to self-MHC class I recognition.
- These findings reveal a novel function for inhibitory NKR in regulating T cell populations.