1. c-MAF-dependent perivascular macrophages regulate diet-induced metabolic syndrome
- Author
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Jamil Z. Kitoko, Juan J. Lafaille, Fanny Matheis, Bernardo S. Reis, Daniel Mucida, Katharine Lu Yang, Dan R. Littman, Camila Pereira Queiroz, Hernandez Moura Silva, Christine Ren-Fielding, Lina Kroehling, and Marcelo T. Bozza
- Subjects
Male ,Metabolic Syndrome ,Macrophages ,Immunology ,Mice, Inbred Strains ,General Medicine ,Disease ,Biology ,medicine.disease ,Diet ,Mice ,Adipose Tissue ,Proto-Oncogene Proteins c-maf ,medicine ,Animals ,Humans ,Female ,Metabolic syndrome - Abstract
Macrophages are an essential part of tissue development and physiology. Perivascular macrophages have been described in tissues and appear to play a role in development and disease processes, although it remains unclear what the key features of these cells are. Here, we identify a subpopulation of perivascular macrophages in several organs, characterized by their dependence on the transcription factor c-MAF and displaying nonconventional macrophage markers including LYVE1, folate receptor 2, and CD38. Conditional deletion of c-MAF in macrophage lineages caused ablation of perivascular macrophages in the brain and altered muscularis macrophages program in the intestine. In the white adipose tissue (WAT), c-MAF–deficient perivascular macrophages displayed an altered gene expression profile, which was linked to an increased vascular branching. Upon feeding high-fat diet (HFD), mice with c-MAF–deficient macrophages showed improved metabolic parameters compared with wild-type mice, including less weight gain, greater glucose tolerance, and reduced inflammatory cell profile in WAT. These results define c-MAF as a central regulator of the perivascular macrophage transcriptional program in vivo and reveal an important role for this tissue-resident macrophage population in the regulation of metabolic syndrome.
- Published
- 2021