Cited by 244Cholesterol and Lipid MetabolismAtherosclerosis and Cardiovascular DiseasesLipoproteins and Cardiovascular Health

Neutrophil activation is attenuated by high-density lipoprotein and apolipoprotein A-I in in vitro and in vivo models of inflammation.

Murphy, Andrew J., Woollard, Kevin J., Suhartoyo, Andreas, Stirzaker, Roslynn A., Shaw, James, Sviridov, Dmitri, Chin-Dusting, Jaye P.F.·2011·Arteriosclerosis, Thrombosis, and Vascular Biology

Abstract

Objective—: Neutrophils play a key role in the immune response but can undesirably exacerbate inflammation. High-density lipoproteins (HDL) are antiinflammatory particles, exerting beneficial cardiovascular influences. We determined whether HDL exerts antiinflammatory effects on neutrophils and explored the mechanisms by which these occur. Methods and Results—: CD11b on activated human neutrophils was significantly attenuated by apolipoprotein A-I (apoA-I) and HDL. The effects of apoA-I were mediated via ABCA1, whereas the effects of HDL were via scavenger receptor BI. Both were associated with a reduction in the abundance of lipid rafts, and a strong correlation between raft abundance and CD11b activation was observed. ApoA-I and HDL reduced neutrophil adhesion to a platelet monolayer under shear flow, as well as neutrophil spreading and migration. ApoA-I also inhibited leukocyte recruitment to the endothelium in an acute in vivo model of inflammation. Finally, infusion of reconstituted HDL in patients with peripheral vascular disease was demonstrated to significantly attenuate neutrophil activation. Conclusion—: We describe here a novel role for HDL and apoA-I in regulating neutrophil activation using in vitro, in vivo, and clinical approaches. We also show that these effects of HDL and apoA-I involve a mechanism requiring changes in membrane domain content rather than in cholesterol efflux per se.

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Authors
Murphy, A. J., Woollard, K. J., Suhartoyo, A., Stirzaker, R. A., Shaw, J., Sviridov, D., & Chin-Dusting, J. P. F.
Affiliations
Baker Heart and Diabetes Institute (AU)
Venue
Arteriosclerosis, Thrombosis, and Vascular Biology
Published
2011-06
Volume
31
Issue
6
Pages
1333-1341
ISSN
  • 1079-5642 (ISSN-L)
  • 1524-4636
OpenAlex
W2125808969
Cited by
244
References
34
Citations by year
2026: 17 · 2025: 23 · 2024: 23 · 2023: 28 · 2022: 14 · 2021: 28 · 2020: 16 · 2019: 16 · 2018: 4 · 2017: 8 · 2016: 9 · 2015: 8 · 2014: 17 · 2013: 18 · 2012: 11
FWCI
16.35
Type
journal article
Language
en
Open access
closed
Locations
  • Arteriosclerosis Thrombosis and Vascular Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Medical Research Council
  • National Health and Medical Research Council
Topics
  • Health Sciences › Medicine › Surgery › Cholesterol and Lipid Metabolism
  • Life Sciences › Immunology and Microbiology › Immunology › Atherosclerosis and Cardiovascular Diseases
  • Health Sciences › Medicine › Surgery › Lipoproteins and Cardiovascular Health
Keywords
high-density lipoprotein, apolipoprotein A-I, neutrophil activation, inflammation, CD11b, ABCA1, scavenger receptor BI, lipid rafts, neutrophil adhesion, neutrophil migration, leukocyte recruitment, peripheral vascular disease
MeSH terms
Animals, Cell Adhesion, Cell Movement, Cholesterol, Humans, Inflammation, Lipoproteins, HDL, Male, Mice, Inbred C57BL, Tetradecanoylphorbol Acetate, Peripheral Vascular Diseases, Apolipoprotein A-I, Neutrophil Activation, Membrane Microdomains, CD11b Antigen, Scavenger Receptors, Class B, Mice

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