Abstract:
BACKGROUND:Atherosclerosis and non-alcoholic fatty liver disease (NAFLD) are complex pathologies characterized by lipid accumulation, chronic inflammation and extensive tissue remodelling. Microparticles (MPs), small membrane vesicles produced by activated and apoptotic cells, might not only be biomarkers, but also functional actors in these pathologies. The apoE2-KI mouse is a model of atherosclerosis and NAFLD. Activation of the nuclear receptor PPARα decreases atherosclerosis and components of non-alcoholic steatohepatitis (NASH) in the apoE2-KI mouse. OBJECTIVES:(1) To determine whether MPs are present in atherosclerotic lesions, liver and plasma during atherosclerosis and NASH progression in apoE2-KI mice, and (2) to study whether PPARα activation modulates MP concentrations. METHODS:ApoE2-KI mice were fed a Western diet to induce atherosclerosis and NASH. MPs were isolated from atherosclerotic lesions, liver and blood and quantified by flow cytometry. RESULTS:An increase of MPs was observed in the atherosclerotic lesions and in the liver of apoE2-KI mice upon Western diet feeding. PPARα activation with fenofibrate decreased MP levels in the atherosclerotic lesions in a PPARα-dependent manner, but did not influence MP concentrations in the liver. CONCLUSION:Here we report that MPs are present in atherosclerotic lesions and in the liver of apoE2-KI mice. Their concentration increased during atherosclerosis and NASH development. PPARα activation differentially modulates MP levels in a tissue-specific manner.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Baron M,Leroyer AS,Majd Z,Lalloyer F,Vallez E,Bantubungi K,Chinetti-Gbaguidi G,Delerive P,Boulanger CM,Staels B,Tailleux Adoi
10.1016/j.atherosclerosis.2011.03.009subject
Has Abstractpub_date
2011-09-01 00:00:00pages
69-76issue
1eissn
0021-9150issn
1879-1484pii
S0021-9150(11)00265-6journal_volume
218pub_type
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