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Nicotinamide Inhibits CD4+ T-Cell Activation and Function.

Lotte Nijhuis1, Alejandra Bodelόn1, Rianne C Scholman1

  • 1Center for Translational Immunology, University Medical Center Utrecht, Lundlaan 6, 3584 EA Utrecht, The Netherlands.

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PubMed
Summary
This summary is machine-generated.

Nicotinamide (NAM) suppresses CD4+ T-cell activation, proliferation, and pro-inflammatory cytokine production. This vitamin B3 derivative modulates key metabolic pathways, offering potential for treating immune-related diseases.

Keywords:
CD4+ T-cell activationNAMauto-immune diseasenicotinamide

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Area of Science:

  • Immunology
  • Cell Biology
  • Metabolism

Background:

  • Chronic inflammation and autoimmune diseases involve (auto)reactive CD4+ T-cell activation.
  • Nicotinamide (NAM), a form of vitamin B3, shows anti-inflammatory effects and is safe in human trials.
  • Mechanisms of NAM's effects, particularly on CD4+ T-cells, are not well understood.

Purpose of the Study:

  • To investigate the direct effects of Nicotinamide (NAM) on CD4+ T-cell activation and function.
  • To elucidate the underlying mechanisms by which NAM influences T-cell responses.

Main Methods:

  • In vitro assessment of NAM's impact on CD4+ T-cell proliferation and surface activation markers.
  • Quantification of pro-inflammatory cytokine production (IL-2, IFNγ, IL-17) following NAM treatment.
  • Analysis of NAM's modulation of metabolic processes, including glycolysis and reactive oxygen species (ROS) production.

Main Results:

  • NAM treatment significantly suppressed CD4+ T-cell activation in vitro.
  • Impaired T-cell proliferation and reduced expression of activation markers were observed with NAM.
  • NAM decreased the production of key pro-inflammatory cytokines (IL-2, IFNγ, IL-17) and modulated T-cell metabolism (glycolysis, ROS).

Conclusions:

  • Nicotinamide (NAM) directly inhibits CD4+ T-cell activation and function through metabolic modulation.
  • These findings provide novel mechanistic insights into NAM's anti-inflammatory properties.
  • NAM represents a promising therapeutic candidate for immune-related and autoimmune diseases.