Deficiency of FAM3D (Family With Sequence Similarity 3, Member D), A Novel Chemokine, Attenuates Neutrophil Recruitment and Ameliorates Abdominal Aortic Aneurysm Development

Arteriosclerosis, Thrombosis, and Vascular Biology
Li HeWei Kong

Abstract

Chemokine-mediated neutrophil recruitment contributes to the pathogenesis of abdominal aortic aneurysm (AAA) and may serve as a promising therapeutic target. FAM3D (family with sequence similarity 3, member D) is a recently identified novel chemokine. Here, we aimed to explore the role of FAM3D in neutrophil recruitment and AAA development. FAM3D was markedly upregulated in human AAA tissues, as well as both elastase- and CaPO4-induced mouse aneurysmal aortas. FAM3D deficiency significantly attenuated the development of AAA in both mouse models. Flow cytometry analysis indicated that FAM3D-/- mice exhibited decreased neutrophil infiltration in the aorta during the early stage of AAA formation compared with their wild-type littermates. Moreover, application of FAM3D-neutralizing antibody 6D7 through intraperitoneal injection markedly ameliorated elastase-induced AAA formation and neutrophil infiltration. Further, in vitro coculture experiments with FAM3D-neutralizing antibody 6D7 and in vivo intravital microscopic analysis indicated that endothelial cell-derived FAM3D induced neutrophil recruitment. Mechanistically, FAM3D upregulated and activated Mac-1 (macrophage-1 antigen) in neutrophils, whereas inhibition of FPR1 (formyl pe...Continue Reading

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Citations

Feb 28, 2019·Arteriosclerosis, Thrombosis, and Vascular Biology·Frank M DavisHong S Lu
Dec 24, 2019·Arteriosclerosis, Thrombosis, and Vascular Biology·Hong S LuAlan Daugherty
May 28, 2020·Arteriosclerosis, Thrombosis, and Vascular Biology·Ying ShaoXiaofeng Yang
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Nov 20, 2021·Journal of the American Heart Association·Haocheng LuYanbo Fan

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Methods Mentioned

BETA
dissection
flow cytometry
Protein Assay
PCR
biopsies
genotyping
Assay
density gradient centrifugation
zymography

Software Mentioned

GraphPad
GraphPad Prism
Image J

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