Abstract：
:Conjugated linoleic acid (CLA) refers to a group of positional and geometric isomers of linoleic acid and has been shown to suppress the development of atherosclerosis in experimental models. However, the mechanism involved is unclear although it is believed it may act as a cyclooxygenase inhibitor or as an agonist of the nuclear receptors, peroxisome proliferator activated receptors (PPARs). In this study, we examined the effect of cis-9,trans-11:trans-10,cis-12-CLA (80:20 blend) on the regression of pre-established atherosclerosis. ApoE(-/-) mice fed a 1% cholesterol diet were randomized at 8 weeks to continue receiving the diet supplemented with 1% control saturated fat or 1% CLA blend for a further 8 weeks. CLA supplementation did not simply prevent progression but induced almost complete resolution of atherosclerosis. Although CLA inhibited platelet deposition, as detected by staining of platelet glycoprotein alpha11b beta111a, it did not inhibit COX-mediated generation of prostaglandins in this model. However, PPARalpha and PPARgamma expression was increased in the aorta of the CLA-treated animals. This was coincident with decreased macrophage accumulation and decreased expression of the macrophage scavenger receptor CD36 and increased apoptosis in the aorta in vivo. CLA induces the resolution of atherosclerosis by negatively regulating the expression of pro-inflammatory genes and inducing apoptosis in the atherosclerotic lesion.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Toomey S,Harhen B,Roche HM,Fitzgerald D,Belton Odoi
10.1016/j.atherosclerosis.2005.08.024keywords:
subject
Has Abstractpub_date
2006-07-01 00:00:00pages
40-9issue
1eissn
0021-9150issn
1879-1484pii
S0021-9150(05)00540-Xjournal_volume
187pub_type
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