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© Research
Publication : Nature communications

Ontogeny of arterial macrophages defines their functions in homeostasis and inflammation.

Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Nature communications - 11 Sep 2020

Weinberger T, Esfandyari D, Messerer D, Percin G, Schleifer C, Thaler R, Liu L, Stremmel C, Schneider V, Vagnozzi RJ, Schwanenkamp J, Fischer M, Busch K, Klapproth K, Ishikawa-Ankerhold H, Klösges L, Titova A, Molkentin JD, Kobayashi Y, Engelhardt S, Massberg S, Waskow C, Perdiguero EG, Schulz C,

Link to Pubmed [PMID] – 32917889

Link to DOI – 10.1038/s41467-020-18287-x

Nat Commun 2020 09; 11(1): 4549

Arterial macrophages have different developmental origins, but the association of macrophage ontogeny with their phenotypes and functions in adulthood is still unclear. Here, we combine macrophage fate-mapping analysis with single-cell RNA sequencing to establish their cellular identity during homeostasis, and in response to angiotensin-II (AngII)-induced arterial inflammation. Yolk sac erythro-myeloid progenitors (EMP) contribute substantially to adventitial macrophages and give rise to a defined cluster of resident immune cells with homeostatic functions that is stable in adult mice, but declines in numbers during ageing and is not replenished by bone marrow (BM)-derived macrophages. In response to AngII inflammation, increase in adventitial macrophages is driven by recruitment of BM monocytes, while EMP-derived macrophages proliferate locally and provide a distinct transcriptional response that is linked to tissue regeneration. Our findings thus contribute to the understanding of macrophage heterogeneity, and associate macrophage ontogeny with distinct functions in health and disease.

https://pubmed.ncbi.nlm.nih.gov/32917889