Abstract:
:Recent studies on mice demonstrated that lipoprotein lipase (LPL) located in the arterial wall might play a pro-atherogenic role. There are major differences between humans and mice in lipoprotein metabolism and in susceptibility to atherosclerosis. We have therefore used rabbits fed normal chow diet as a model to assess such localized effects by adenovirus-mediated gene transfer of human catalytically active wild type LPL (hLPLwt) and an inactive mutant (hLPL194) to balloon-injured carotid arteries. By morphometric analysis on cryosections stained with Oil Red O (ORO) we found 7- and 4-fold increases, respectively, of lipid deposition in the arterial walls 7 days after infection with adenovirus expressing hLPLwt or hLPL194, when compared with a virus expressing human alkaline phosphatase (hAP) as control. Macrophages were detected in the arteries expressing both forms of LPL, but apoB was only found in arteries expressing hLPLwt. Expression of the LPL gene products was transient and was gone after 2 weeks, but the accumulated lipid deposits remained between the neointimal and the media layers even after 8 weeks. Our data demonstrate that expression of LPL in the arterial wall (with or without lipase activity) leads to lipid accumulation in balloon-injured rabbit arteries, and could result in enhanced formation of atherosclerotic lesions.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Wu X,Wang J,Fan J,Chen M,Chen L,Huang W,Liu Gdoi
10.1016/j.atherosclerosis.2005.08.032keywords:
subject
Has Abstractpub_date
2006-07-01 00:00:00pages
65-73issue
1eissn
0021-9150issn
1879-1484pii
S0021-9150(05)00544-7journal_volume
187pub_type
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