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Cytotoxic T Cells-mediated Immune Response01:27

Cytotoxic T Cells-mediated Immune Response

Cytotoxic T cells are a vital component of the immune system. They have the remarkable ability to identify and target antigens on infected or abnormal cells. These antigens often originate from intracellular pathogens such as viruses or abnormal proteins cancer cells produce.
Immunological surveillance is the ability of immune cells to monitor and eliminate infected cells with intracellular pathogens, neoplastically transformed cells, and cells with non-self antigens. Cytotoxic T cells and NK...

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Expansion of Human Peripheral Blood &#947;&#948; T Cells using Zoledronate
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Human γδ T Cell Function Is Impaired Upon Mevalonate Pathway Inhibition.

Tsz Kin Suen1, Burcu Al1, Thomas Ulas2,3,4

  • 1Immunology and Metabolism, Life and Medical Sciences Institute, University of Bonn, Bonn, Germany.

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Summary

Zoledronate expands Vδ2 T cells but impairs their function by inhibiting mevalonate metabolism. This finding is crucial for improving Vδ2 T cell immunotherapies and understanding statin/aminobisphosphonate treatment effects.

Keywords:
T cellcytokinesflow cytometryhumanprotein kinases/phophatases

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Area of Science:

  • Immunology
  • Cell Biology
  • Biochemistry

Background:

  • Vδ2 T cells are key players in immunotherapy for cancer and infections.
  • Aminobisphosphonates like zoledronate are used to expand Vδ2 T cells in vitro.
  • Current in vitro generated Vδ2 T cells show limited clinical efficacy.

Purpose of the Study:

  • To investigate the impact of zoledronate on Vδ2 T cell effector function.
  • To elucidate the molecular mechanisms underlying zoledronate-induced Vδ2 T cell dysfunction.
  • To explore the role of mevalonate metabolism in Vδ2 T cell function.

Main Methods:

  • In vitro and in vivo experiments using zoledronate, statins, and 6-fluoromevalonate.
  • Assessment of Vδ2 T cell proliferation, effector function, and TIM3 expression.
  • Analysis of mevalonate metabolism, protein prenylation, and intracellular signaling.
  • Transcriptome and kinome profiling.

Main Results:

  • Zoledronate induced excessive Vδ2 T cell proliferation but impaired effector function and upregulated TIM3.
  • Inhibition of mevalonate metabolism by zoledronate, statins, or genetic deficiency compromised Vδ2 T cell cytokine and cytotoxic molecule production.
  • Disruption of mevalonate metabolism led to altered transcriptome and kinome profiles.
  • Impaired protein prenylation and intracellular signaling were observed.

Conclusions:

  • Mevalonate metabolism is essential for optimal Vδ2 T cell function.
  • Zoledronate's inhibition of mevalonate metabolism underlies Vδ2 T cell dysfunction.
  • Findings necessitate re-evaluation of Vδ2 T cell expansion protocols and have implications for patients on statin or aminobisphosphonate therapy.