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Analyzing Ex Vivo Metabolic Flux in Splenic and Cardiac Macrophages and Bone Marrow Monocytes

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Macrophage metabolic reprogramming during chronic lung disease.

Patricia P Ogger¹, Adam J Byrne²

¹National Heart & Lung Institute, Imperial College London, London, SW7 2AZ, UK.

Mucosal Immunology

|November 13, 2020

Summary

Airway macrophages (AMs) are crucial for lung health. Metabolic changes in AMs during chronic lung diseases (CLDs) impact their function, offering potential therapeutic targets.

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Area of Science:

Immunology
Metabolism
Pulmonology

Background:

Airway macrophages (AMs) are vital sentinels of lung homeostasis and immune tolerance.
Recent research highlights the crucial role of cellular metabolism in macrophage function.
AMs exhibit metabolic plasticity, adapting their metabolic profile to the local environment in chronic lung diseases (CLDs).

Purpose of the Study:

To review the metabolic alterations underlying AM phenotype and function in CLDs.
To explore the potential of targeting AM metabolic plasticity for novel therapeutic strategies.

Main Methods:

Literature review focusing on recent studies of AM metabolism in CLDs.
Analysis of metabolic pathways utilized by AMs, including reactive oxygen species (ROS) generation, aerobic glycolysis, and mitochondrial respiration.

Main Results:

AMs reprogram their metabolism during CLDs to support host defense through ROS production, rapid cytokine generation via glycolysis, and inflammation via mitochondrial respiration.
These metabolic adaptations, while crucial for defense, can also contribute to chronic pathology in the lungs.

Conclusions:

Metabolic reprogramming is a key feature of AMs in CLDs.
Understanding AM metabolic plasticity offers promising avenues for developing targeted therapies for CLDs.