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Metallothionein 3 Controls the Phenotype and Metabolic Programming of Alternatively Activated Macrophages

Identifieur interne : 000638 ( Main/Exploration ); précédent : 000637; suivant : 000639

Metallothionein 3 Controls the Phenotype and Metabolic Programming of Alternatively Activated Macrophages

Auteurs : Debabrata Chowdhury [États-Unis] ; Hani Alrefai [États-Unis] ; Julio A. Landero Figueroa [États-Unis] ; Kathleen Candor [États-Unis] ; Aleksey Porollo [États-Unis] ; Roger Fecher [États-Unis] ; Senad Divanovic [États-Unis] ; George S. Deepe [États-Unis] ; Kavitha Subramanian Vignesh [États-Unis]

Source :

RBID : PMC:6664296

Abstract

SUMMARY

Alternatively activated (M2) macrophages promote wound healing but weaken antimicrobial defenses. The mechanisms that enforce macrophage divergence and dictate the phenotypic and metabolic characteristics of M2 macrophages remain elusive. We show that alternative activation with interleukin (IL)-4 induces expression of metallothionein 3 (MT3) that regulates macrophage polarization and function. MT3 was requisite for metabolic reprograming in IL-4-stimulated macrophages or M(IL-4) macrophages to promote mitochondrial respiration and suppress glycolysis. MT3 fostered an M(IL-4) phenotype, suppressed hypoxia inducible factor (HIF)1α activation, and thwarted the emergence of a proinflammatory M1 program in macrophages. MT3 deficiency augmented macrophage plasticity, resulting in enhanced interferon γ (IFNγ) responsiveness and a dampened M(IL-4) phenotype. Thus, MT3 programs the phenotype and metabolic fate of M(IL-4) macrophages.


Url:
DOI: 10.1016/j.celrep.2019.05.093
PubMed: 31242420
PubMed Central: 6664296


Affiliations:


Links toward previous steps (curation, corpus...)


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<p id="P3">Alternatively activated (M2) macrophages promote wound healing but weaken antimicrobial defenses. The mechanisms that enforce macrophage divergence and dictate the phenotypic and metabolic characteristics of M2 macrophages remain elusive. We show that alternative activation with interleukin (IL)-4 induces expression of metallothionein 3 (MT3) that regulates macrophage polarization and function. MT3 was requisite for metabolic reprograming in IL-4-stimulated macrophages or M(IL-4) macrophages to promote mitochondrial respiration and suppress glycolysis. MT3 fostered an M(IL-4) phenotype, suppressed hypoxia inducible factor (HIF)1α activation, and thwarted the emergence of a proinflammatory M1 program in macrophages. MT3 deficiency augmented macrophage plasticity, resulting in enhanced interferon γ (IFNγ) responsiveness and a dampened M(IL-4) phenotype. Thus, MT3 programs the phenotype and metabolic fate of M(IL-4) macrophages.</p>
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