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Adipose tissue macrophages develop from bone marrow-independent progenitors in Xenopus laevis and mouse.


ABSTRACT: ATMs have a metabolic impact in mammals as they contribute to metabolically harmful AT inflammation. The control of the ATM number may have therapeutic potential; however, information on ATM ontogeny is scarce. Whereas it is thought that ATMs develop from circulating monocytes, various tissue-resident Mϕs are capable of self-renewal and develop from BM-independent progenitors without a monocyte intermediate. Here, we show that amphibian AT contains self-renewing ATMs that populate the AT before the establishment of BM hematopoiesis. Xenopus ATMs develop from progenitors of aVBI. In the mouse, a significant amount of ATM develops from the yolk sac, the mammalian equivalent of aVBI. In summary, this study provides evidence for a prenatal origin of ATMs and shows that the study of amphibian ATMs can enhance the understanding of the role of the prenatal environment in ATM development.

SUBMITTER: Hassnain Waqas SF 

PROVIDER: S-EPMC5574031 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature

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Adipose tissue macrophages develop from bone marrow-independent progenitors in <i>Xenopus laevis</i> and mouse.

Hassnain Waqas Syed F SF   Noble Anna A   Hoang Anh C AC   Ampem Grace G   Popp Manuela M   Strauß Sarah S   Guille Matthew M   Röszer Tamás T  

Journal of leukocyte biology 20170622 3


ATMs have a metabolic impact in mammals as they contribute to metabolically harmful AT inflammation. The control of the ATM number may have therapeutic potential; however, information on ATM ontogeny is scarce. Whereas it is thought that ATMs develop from circulating monocytes, various tissue-resident Mϕs are capable of self-renewal and develop from BM-independent progenitors without a monocyte intermediate. Here, we show that amphibian AT contains self-renewing ATMs that populate the AT before  ...[more]

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