HLA-G Inhibits T Cell Growth via SHP-2 and mTOR Pathway
Author Information
Author(s): Ketroussi Farah, Giuliani Massimo, Bahri Rajia, Azzarone Bruno, Charpentier Bernard, Durrbach Antoine
Primary Institution: INSERM U1014, Villejuif, France
Hypothesis
HLA-G regulates T-cell responses through its interaction with inhibitory receptors and affects the cell-cycle entry of T cells.
Conclusion
HLA-G inhibits the mTOR pathway through the activation of phosphatase SHP-2, which leads to reduced T-cell proliferation.
Supporting Evidence
- HLA-G inhibits T-cell proliferation by interacting with the LILRB1 receptor.
- The presence of HLA-G leads to dephosphorylation of mTOR and p70S6K.
- Inhibition of SHP-2 prevents the effects of HLA-G on mTOR.
- HLA-G does not affect the TCR or CD28 downstream pathways.
Takeaway
HLA-G is like a stop sign for T cells, telling them to slow down and not grow too fast, which helps keep the immune system in check.
Methodology
The study involved isolating T cells from healthy volunteers and examining their proliferation in the presence of HLA-G and various inhibitors.
Participant Demographics
Healthy volunteers were used for T cell isolation.
Digital Object Identifier (DOI)
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