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Muscle-immune metabolic crosstalk: shared pathways in cachexia and exercise.

Stefanie Westermann1, Bastian C Bennühr2, Amy R Fumo3

  • 1Department of Bioinformatics and Biochemistry, Braunschweig Integrated Centre of Systems Biology (BRICS), Technische Universität Braunschweig, Braunschweig, Germany; German Center for Infection Research (DZIF), partner site Hannover-Braunschweig, Germany.

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Summary
This summary is machine-generated.

Skeletal muscle and immune system crosstalk is vital for health. Disruptions cause wasting diseases like cachexia, while exercise promotes muscle growth, highlighting context-dependent metabolic reprogramming.

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Area of Science:

  • Immunology
  • Metabolism
  • Exercise Physiology

Background:

  • Skeletal muscle and the immune system engage in constant metabolite and signal exchange crucial for homeostasis.
  • Disrupted communication, seen in infection, inflammation, or cancer, leads to cachexia, a wasting syndrome with altered amino acid flux, mitochondrial dysfunction, and energy imbalance.

Purpose of the Study:

  • To review the metabolic reprogramming in muscle-immune crosstalk during cachexia and exercise.
  • To highlight how shared mediators, like interleukin-6, can induce catabolism or adaptation based on context.
  • To explore therapeutic strategies targeting metabolism and immune-metabolic communication.

Main Methods:

  • Literature review focusing on metabolic reprogramming in skeletal muscle and immune interactions.
  • Analysis of shared signaling pathways in cachexia and exercise.
  • Examination of the role of specific mediators like interleukin-6.

Main Results:

  • Identical mediators can drive opposing outcomes (catabolism vs. adaptation) depending on the physiological context.
  • Cachexia involves detrimental metabolic shifts and energy imbalance due to disrupted muscle-immune crosstalk.
  • Exercise leverages similar pathways for beneficial outcomes like regeneration and hypertrophy.

Conclusions:

  • Understanding the dual role of immune mediators in muscle metabolism is key.
  • Targeting metabolic and immune-metabolic communication pathways offers therapeutic potential for cachexia and other conditions.
  • Context-dependent regulation of metabolic reprogramming is central to muscle-immune interactions.