Aortic intimal resident macrophages are essential for maintenance of the non-thrombogenic intravascular state.

ABSTRACT: Leukocytes and endothelial cells frequently cooperate to resolve inflammatory events. In most cases, these interactions are transient in nature and triggered by immunological insults. Here, we report that in areas of disturbed blood flow, aortic endothelial cells permanently and intimately associate with a population of specialized macrophages that are recruited at birth from the closing ductus arteriosus and share the luminal surface with the endothelium becoming interwoven in the tunica intima. Anatomical changes that affect hemodynamics, like in patent ductus arteriosus, alter macrophage seeding to coincide with regions of disturbed flow. Aortic resident macrophages expand in situ via direct cell renewal. Induced-depletion of intimal macrophages led to thrombin-mediated endotheli

SUBMITTER: Hernandez GE 

PROVIDER: S-EPMC9121812 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature