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CD8+ T-cell senescence: no role for mTOR

Sian M Henson1

  • 1Division of Infection and Immunity, University College London, London, WC1E 6JF, U.K. s.henson@ucl.ac.uk.

Biochemical Society Transactions
|November 10, 2015
PubMed

Insights

Immune decline with aging increases disease risk. This review challenges the idea that the mammalian target of rapamycin (mTOR) pathway controls all age-related CD8(+) T-cell functions, suggesting new therapeutic targets.

Area of Science:

  • Immunology
  • Aging Research
  • Cellular Biology

Background:

  • Aging leads to immune decline, increasing susceptibility to infections and cancer.
  • Mammalian target of rapamycin (mTOR) is implicated in aging and age-related diseases.
  • Senescent CD8(+) T-cells may operate independently of mTOR signaling.

Purpose of the Study:

  • To review the role of mTOR in immune aging.
  • To challenge the universal control of CD8(+) T-cell function by mTOR.
  • To explore alternative pathways in T-cell senescence.

Main Methods:

  • Literature review of aging and immunology studies.
  • Analysis of research on mTOR inhibitors and T-cell function.
  • Examination of data on senescent CD8(+) T-cells.

Main Results:

  • mTOR is a key regulator of aging processes.
  • mTOR inhibitors show potential in mitigating age-related pathologies.
  • Emerging evidence suggests senescent CD8(+) T-cells are mTOR-independent.

Conclusions:

  • The universal control of CD8(+) T-cell function by mTOR may be a misconception.
  • Further research is needed to understand mTOR-independent pathways in T-cell aging.
  • Identifying alternative targets could lead to novel immunotherapies for aging populations.
Keywords:
CD8T-cellagingmTORsenescence

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