Cited by 102Cholesterol and Lipid MetabolismAtherosclerosis and Cardiovascular DiseasesLipoproteins and Cardiovascular Health

Tissue-Specific Roles of ABCA1 Influence Susceptibility to Atherosclerosis

Brunham, Liam R., Singaraja, Roshni R., Duong, MyNgan, Timmins, Jenelle M., Fievet, Catherine, Bissada, Nagat, Kang, Martin H., Samra, Amrit +5 more·2009·Arteriosclerosis, Thrombosis, and Vascular Biology

Abstract

Objective— The ATP-binding cassette transporter, subfamily A, member 1 ( ABCA1 ) plays a key role in HDL cholesterol metabolism. However, the role of ABCA1 in modulating susceptibility to atherosclerosis is controversial. Methods and Results— We investigated the role of ABCA1 in atherosclerosis using a combination of overexpression and selective deletion models. First, we examined the effect of transgenic overexpression of a full-length human ABCA1 -containing bacterial artificial chromosome (BAC) in the presence or absence of the endogenous mouse Abca1 gene. ABCA1 overexpression in the atherosclerosis-susceptible Ldlr −/− background significantly reduced the development of atherosclerosis in both the presence and absence of mouse Abca1 . Next, we used mice with tissue-specific inactivation of Abca1 to dissect the discrete roles of Abca1 in different tissues on susceptibility to atherosclerosis. On the Apoe −/− background, mice lacking hepatic Abca1 had significantly reduced HDL cholesterol and accelerated atherosclerosis, indicating that the liver is an important site at which Abca1 plays an antiatherogenic role. In contrast, mice with macrophage-specific inactivation of Abca1 on the Ldlr −/− background displayed no change in atherosclerotic lesion area. Conclusions— These data indicate that physiological expression of Abca1 modulates the susceptibility to atherosclerosis and establish hepatic Abca1 expression as an important site of atheroprotection. In contrast, we show that selective deletion of macrophage Abca1 does not significantly modulate atherogenesis.

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Crossref · 10.1161/atvbaha.108.182303

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Authors
Brunham, L. R., Singaraja, R. R., Duong, M., Timmins, J. M., Fievet, C., Bissada, N., Kang, M. H., Samra, A., Fruchart, J.-C., McManus, B., Staels, B., Parks, J. S., & Hayden, M. R.
Affiliations
  • Providence Health Care (CA)
  • From the Centre for Molecular Medicine and Therapeutics and Child and Family Research Institute (L.R.B., R.R.S., N.B., M.H.K., M.R.H.), University of British Columbia, Vancouver, Canada; the Department of Pathology/Section on Lipid Sciences (M.D., J.M.T., J.S.P.), Wake Forest University Health Sciences, Winston-Salem, NC; Institut Pasteur de Lille, Inserm U545 (C.F., J.C.F., B.S.), Université de Lille, France; and the iCAPTURE Centre (A.S., B.M.), St Paul’s Hospital/Providence Health Care, University of British Columbia, Vancouver, Canada.
Venue
Arteriosclerosis, Thrombosis, and Vascular Biology
Published
2009-04
Volume
29
Issue
4
Pages
548-554
ISSN
  • 1079-5642 (ISSN-L)
  • 1524-4636
OpenAlex
W2160940635
Cited by
102
References
37
Citations by year
2025: 1 · 2024: 1 · 2023: 4 · 2022: 6 · 2021: 4 · 2020: 4 · 2019: 7 · 2018: 3 · 2017: 3 · 2016: 7 · 2015: 7 · 2014: 11 · 2013: 10 · 2012: 9
FWCI
11.46
Type
journal article
Language
en
Open access
closed
Locations
  • Arteriosclerosis Thrombosis and Vascular Biology (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Heart, Lung, and Blood Institute (HL 49373, P01HL049373)
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
ABCA1, atherosclerosis susceptibility, HDL cholesterol metabolism, tissue-specific gene deletion, Ldlr-deficient mice, ApoE-deficient mice, atheroprotection
MeSH terms
Animals, Apolipoproteins E, Dietary Fats, Disease Models, Animal, Humans, Cholesterol, HDL, Cholesterol, LDL, Liver, Mice, Transgenic, Phenotype, Receptors, LDL, Cholesterol, VLDL, Macrophages, Peritoneal, Mice, Knockout, ATP-Binding Cassette Transporters, Genetic Predisposition to Disease, Chromosomes, Artificial, Bacterial, Atherosclerosis, Mice, ATP Binding Cassette Transporter 1

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