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Updated: Jun 22, 2026
08:18
Induction and Validation of Cellular Senescence in Primary Human Cells
Published on: June 20, 2018
KLRG1--more than a marker for T cell senescence
1Division of Infection and Immunity, Department of Immunology, University College London, 46 Cleveland Street, London, UK. s.henson@ucl.ac.uk
Age (Dordrecht, Netherlands)
|May 30, 2009
Summary
Killer-cell lectin like receptor G1 (KLRG1) may actively maintain T cell functional defects with age. Emerging data suggest KLRG1, often seen as a senescence marker, plays a key inhibitory role.
Area of Science:
- Immunology
- Cellular senescence
- T cell biology
Background:
- Killer-cell lectin like receptor G1 (KLRG1) is expressed on NK and T cells.
- KLRG1 has been considered a marker of senescence and cellular differentiation.
- Emerging evidence suggests KLRG1 has an inhibitory function.
Purpose of the Study:
- To review evidence supporting KLRG1's inhibitory role.
- To emphasize KLRG1's potential role in age-related T cell functional defects.
- To explore how inhibitory receptor signaling may maintain these defects.
Main Methods:
- Literature review
- Analysis of existing data on KLRG1 function
- Examination of T cell differentiation and aging
Main Results:
- KLRG1's role as an inhibitory receptor is increasingly supported by data.
- Inhibitory signaling via KLRG1 may contribute to functional impairments in aged T cells.
- This signaling could actively maintain age-associated T cell defects.
Conclusions:
- KLRG1's function extends beyond a simple marker of senescence or differentiation.
- KLRG1 signaling is implicated in the functional decline of T cells during aging.
- Targeting KLRG1 pathways may offer strategies to mitigate age-related immune dysfunction.
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