Details

Autor(en) / Beteiligte

• Guo, Liang
• Akahori, Hirokuni
• Harari, Emanuel
• Smith, Samantha L
• Polavarapu, Rohini
• Karmali, Vinit
• Otsuka, Fumiyuki
• Gannon, Rachel L
• Braumann, Ryan E
• Dickinson, Megan H
• Gupta, Anuj
• Jenkins, Audrey L
• Lipinski, Michael J
• Kim, Johoon
• Chhour, Peter
• de Vries, Paul S
• Jinnouchi, Hiroyuki
• Kutys, Robert
• Mori, Hiroyoshi
• Kutyna, Matthew D
• Torii, Sho
• Sakamoto, Atsushi
• Choi, Cheol Ung
• Cheng, Qi
• Grove, Megan L
• Sawan, Mariem A
• Zhang, Yin
• Cao, Yihai
• Kolodgie, Frank D
• Cormode, David P
• Arking, Dan E
• Boerwinkle, Eric
• Morrison, Alanna C
• Erdmann, Jeanette
• Sotoodehnia, Nona
• Virmani, Renu
• Finn, Aloke V

Titel

CD163+ macrophages promote angiogenesis and vascular permeability accompanied by inflammation in atherosclerosis

Ist Teil von

• The Journal of clinical investigation, 2018-03, Vol.128 (3), p.1106-1124

Ort / Verlag

United States: American Society for Clinical Investigation

Erscheinungsjahr

2018

Link zum Volltext

Quelle

EZB Electronic Journals Library

Beschreibungen/Notizen

• Intake of hemoglobin by the hemoglobin-haptoglobin receptor CD163 leads to a distinct alternative non-foam cell antiinflammatory macrophage phenotype that was previously considered atheroprotective. Here, we reveal an unexpected but important pathogenic role for these macrophages in atherosclerosis. Using human atherosclerotic samples, cultured cells, and a mouse model of advanced atherosclerosis, we investigated the role of intraplaque hemorrhage on macrophage function with respect to angiogenesis, vascular permeability, inflammation, and plaque progression. In human atherosclerotic lesions, CD163+ macrophages were associated with plaque progression, microvascularity, and a high level of HIF1α and VEGF-A expression. We observed irregular vascular endothelial cadherin in intraplaque microvessels surrounded by CD163+ macrophages. Within these cells, activation of HIF1α via inhibition of prolyl hydroxylases promoted VEGF-mediated increases in intraplaque angiogenesis, vascular permeability, and inflammatory cell recruitment. CD163+ macrophages increased intraplaque endothelial VCAM expression and plaque inflammation. Subjects with homozygous minor alleles of the SNP rs7136716 had elevated microvessel density, increased expression of CD163 in ruptured coronary plaques, and a higher risk of myocardial infarction and coronary heart disease in population cohorts. Thus, our findings highlight a nonlipid-driven mechanism by which alternative macrophages promote plaque angiogenesis, leakiness, inflammation, and progression via the CD163/HIF1α/VEGF-A pathway.