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Analysis of Human Natural Killer Cell Metabolism
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ARID5B regulates metabolic programming in human adaptive NK cells.

Frank Cichocki1, Cheng-Ying Wu1, Bin Zhang1

  • 1Department of Medicine, University of Minnesota, Minneapolis, MN.

The Journal of Experimental Medicine
|August 1, 2018
PubMed
Summary

Adaptive natural killer (NK) cells possess unique metabolic traits. The protein ARID5B regulates these adaptive NK cell metabolic processes and survival, offering potential therapeutic targets.

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Area of Science:

  • Immunology
  • Cell Biology
  • Metabolism

Background:

  • Adaptive natural killer (NK) cells are a subset of lymphocytes that exhibit memory properties following human cytomegalovirus infection.
  • Understanding the unique metabolic characteristics of these adaptive NK cells is crucial for elucidating their function and persistence.

Purpose of the Study:

  • To investigate the specific metabolic processes employed by adaptive NK cells.
  • To identify key molecular regulators of metabolism within these cells.

Main Methods:

  • Comparative analysis of metabolic profiles between adaptive and non-adaptive NK cells.
  • Investigation of the role of AT-rich interaction domain 5B (ARID5B) using knockdown and overexpression studies.
  • Assessment of mitochondrial function, gene expression, and cellular metabolism.

Main Results:

  • Adaptive NK cells display enhanced oxidative mitochondrial respiration, higher mitochondrial membrane potential, and increased spare respiratory capacity.
  • A short isoform of ARID5B is selectively induced in adaptive NK cells via DNA hypomethylation.
  • ARID5B directly promotes mitochondrial function, oxidative metabolism, cell survival, and interferon-gamma (IFN-γ) production.

Conclusions:

  • ARID5B is a critical regulator of metabolic processes in human adaptive NK cells.
  • Targeting ARID5B may represent a novel therapeutic strategy for conditions involving adaptive NK cells.