Abstract:
:The efflux of cholesterol from cells and its incorporation into HDL is believed to be the initial step in reverse cholesterol transport. This report addresses the question of whether there is a relationship between the ability of serum to promote efflux of cholesterol from cells in culture and the severity of coronary artery atherosclerosis (CAA). Surgically postmenopausal cynomolgus monkeys (n=142) were treated for 2-years with conjugated equine estrogens (CEE), CEE plus medroxyprogesterone acetate, or two different doses of tibolone, a synthetic steroid. CAA was determined at necropsy, and the cholesterol efflux potential of serum from each animal was determined using 3H-cholesterol-labeled Fu5AH cells and human skin fibroblasts in culture. A significant negative correlation was seen between CAA and cholesterol efflux from Fu5AH cells (r=-0.44, P< or =0.0001), but not skin fibroblasts. Although there was a wide range of plasma HDL cholesterol concentrations in these animals (10-81 mg/dl), using multiple regression analysis, LDL+VLDL cholesterol and the serum cholesterol efflux potential were the only significant independent predictors of CAA, explaining 41.6 and 10.7% of the variability (P<0.0001), respectively. Thus, the potential of serum to promote cholesterol efflux from Fu5AH cells may represent a useful independent measure for improving the assessment of CAA risk.
journal_name
Atherosclerosisjournal_title
Atherosclerosisauthors
Mikkola TS,Anthony MS,Clarkson TB,St Clair RWdoi
10.1016/s0021-9150(03)00247-8keywords:
subject
Has Abstractpub_date
2003-09-01 00:00:00pages
31-8issue
1eissn
0021-9150issn
1879-1484pii
S0021-9150(03)00247-8journal_volume
170pub_type
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