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Adiponectin prevents atherosclerosis by increasing cholesterol efflux from macrophages.

Abstract：

:Plasma high density lipoprotein (HDL)-cholesterol levels are inversely correlated to the risk of atherosclerotic cardiovascular diseases. Reverse cholesterol transport (RCT) is one of the major protective systems against atherosclerosis, in which HDL particles play a crucial role to carry cholesterol derived from peripheral tissues to the liver. Recently, ATP-binding cassette transporters (ABCA1, ABCG1) and scavenger receptor (SR-BI) have been identified as important membrane receptors to generate HDL by removing cholesterol from foam cells. Adiponectin (APN) secreted from adipocytes is one of the important molecules to inhibit the development of atherosclerosis. Epidemiological studies have revealed a positive correlation between plasma HDL-cholesterol and APN concentrations in humans, although its mechanism has not been clarified. Therefore, in the present study, we investigated the role of APN on RCT, in particular, cellular cholesterol efflux from human monocyte-derived and APN-knockout (APN-KO) mice macrophages. APN up-regulated the expression of ABCA1 in human macrophages, respectively. ApoA-1-mediated cholesterol efflux from macrophages was also increased by APN treatment. Furthermore, the mRNA expression of LXRalpha and PPARgamma was increased by APN. In APN-KO mice, the expression of ABCA1, LXRalpha, PPARgamma, and apoA-I-mediated cholesterol efflux was decreased compared with wild-type mice. In summary, APN might protect against atherosclerosis by increasing apoA-I-mediated cholesterol efflux from macrophages through ABCA1-dependent pathway by the activation of LXRalpha and PPARgamma.

journal_name

Biochem Biophys Res Commun

journal_title

Biochemical and biophysical research communications

authors

Tsubakio-Yamamoto K,Matsuura F,Koseki M,Oku H,Sandoval JC,Inagaki M,Nakatani K,Nakaoka H,Kawase R,Yuasa-Kawase M,Masuda D,Ohama T,Maeda N,Nakagawa-Toyama Y,Ishigami M,Nishida M,Kihara S,Shimomura I,Yamashita S

doi

10.1016/j.bbrc.2008.08.009

subject

Has Abstract

pub_date

2008-10-24 00:00:00

pages

390-4

issue

3

eissn

0006-291X

issn

1090-2104

pii

S0006-291X(08)01532-5

journal_volume

375

pub_type

杂志文章

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