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Reprograming Model of Human Monocyte-derived Macrophages for In-vitro Assays
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Reprograming Model of Human Monocyte-derived Macrophages for In-vitro Assays

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Type 2 cytokine signaling in macrophages protects from cellular senescence and organismal aging

Zhao Zhou1, Jingfei Yao1, Dongmei Wu2

  • 1Institute of Molecular Medicine, Beijing Key Laboratory of Cardiometabolic Molecular Medicine, College of Future Technology, Peking University, Beijing 100871, China.

Immunity
|January 23, 2024
PubMed

Insights

Type 2 cytokine signaling, specifically the interleukin-4 (IL-4)-STAT6 pathway, protects macrophages from aging and senescence. This discovery offers potential therapeutic strategies for enhancing healthy aging and combating age-related diseases.

Area of Science:

  • Immunology
  • Cellular Biology
  • Gerontology

Background:

  • Cellular senescence is a hallmark of aging, contributing to age-related diseases.
  • Aging-associated immune dysfunction (immunosenescence) plays a role, but mechanisms are unclear.

Purpose of the Study:

  • To investigate the role of type 2 cytokine signaling in macrophage senescence and aging.
  • To elucidate the protective mechanisms of the interleukin-4 (IL-4)-STAT6 pathway.

Main Methods:

  • Investigated the effects of type 2 cytokine signaling deficiency on aging.
  • Examined the impact of the IL-4-STAT6 pathway on macrophage senescence.
  • Assessed STAT6's role in DNA repair gene expression and nuclear DNA release.
  • Evaluated IL-4 treatment in aged mice models.

Main Results:

  • Deficiency in type 2 cytokine signaling accelerated aging.
  • The IL-4-STAT6 pathway protected macrophages from senescence.
  • Activated STAT6 enhanced DNA repair gene expression.
  • STAT6 deficiency led to cytoplasmic nuclear DNA release, promoting inflammation and aging.
  • IL-4 treatment prevented macrophage senescence and improved health span in aged mice, with additive effects when combined with senolytics.

Conclusions:

  • Type 2 cytokine signaling protects macrophages from immunosenescence.
  • The IL-4-STAT6 pathway is a key regulator of macrophage aging.
  • Targeting this pathway holds therapeutic potential for improving healthy aging and treating age-related conditions.
Keywords:
DNA repairIL-4STAT6agingimmunosenescenceinflammagingmacrophagetype 2 cytokine

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