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Updated: Jun 6, 2026

Analysis of Human Natural Killer Cell Metabolism
09:03

Analysis of Human Natural Killer Cell Metabolism

Published on: June 22, 2020

6.6K

Single-cell analysis identifies CPT1a-associated metabolic remodeling in human NK cells during COVID-19

Sarah Benezech1,2, Louis Picq1, Marine Villard1,2

  • 1UMR5308, INSERM U1111, Centre International de Recherche en Infectiologie, Centre National de la Recherche Scientifique, Université de Lyon, Université Claude Bernard Lyon 1, École Normale Supérieure de Lyon, Lyon, France.

Journal of Immunology (Baltimore, Md. : 1950)
|April 27, 2026
PubMed

Insights

Natural killer (NK) cells ramp up metabolism during mild COVID-19. This metabolic reprogramming, including enhanced glucose and fatty acid uptake, supports their heightened antiviral activity against SARS-CoV-2.

Area of Science:

  • Immunology
  • Cellular Metabolism

Background:

  • Natural killer (NK) cells are crucial for early antiviral defense.
  • The metabolic regulation of NK cells during acute human viral infections like SARS-CoV-2 is not fully understood.

Purpose of the Study:

  • To investigate NK cell activation and metabolic reprogramming in individuals with mild breakthrough SARS-CoV-2 infection.
  • To identify key metabolic regulators and pathways supporting NK cell function during viral infection.

Main Methods:

  • Analysis of NK cell activation markers (CD69, CD38, pSTAT5) and cytotoxicity in 47 vaccinated individuals with mild COVID-19 and 20 healthy controls.
  • Single-cell metabolic profiling, including assessment of cell size, nutrient uptake, and mitochondrial function.
  • Spectral cytometry to identify metabolic regulators, focusing on CPT1a expression and fatty acid oxidation.

Main Results:

  • COVID-19 patients showed elevated NK cell activation markers and enhanced cytotoxicity.
  • Single-cell analysis revealed increased NK cell size, nutrient uptake (glucose, amino acids), and mitochondrial activity, indicating a globally activated metabolic state.
  • CPT1a was identified as a key marker, with elevated expression correlating with NK cell activation and enhanced long-chain fatty acid oxidation, a phenomenon specific to NK cells.

Conclusions:

  • Human NK cells undergo coordinated cytokine-driven activation and metabolic remodeling during SARS-CoV-2 infection.
  • NK cells integrate glycolysis and lipid oxidation to support amplified effector functions against the virus.
  • Metabolic reprogramming is a key feature of NK cell response in acute viral infections.
Keywords:
NK cellsbioenergetic metabolismcytokine-mediated activationhumannatural killer cellsviral infection

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