PMID- 1770292 OWN - NLM STAT- MEDLINE DCOM- 19920227 LR - 20210217 IS - 0022-2275 (Print) IS - 0022-2275 (Linking) VI - 32 IP - 11 DP - 1991 Nov TI - Hyperlipoproteinemia in Nagase analbuminemic rats: effects of pravastatin on plasma (apo)lipoproteins and lecithin:cholesterol acyltransferase activity. PG - 1719-28 AB - The present study demonstrates very high levels of plasma lipids and high density lipoprotein (HDL) apolipoproteins (apoA-I and apoE) in female Nagase analbuminemic rats (NAR) fed a semi-synthetic diet in order to further increase the hyperlipidemia present in this strain. Plasma apoB-containing lipoproteins (very low, intermediate, and low density lipoproteins) were also elevated in NAR. Plasma cholesterol was mainly present in lipoprotein particles with a density between 1.02 and 1.12 g/ml. Separation of lipoprotein classes by gel filtration showed that the major cholesterol-carrying lipoprotein fractions in NAR plasma are apoE-rich HDL and apoA-I-rich HDL. The high HDL levels in NAR are explained, at least partly, by the two- to threefold elevated activity of plasma lecithin:cholesterol acyltransferase (LCAT). The lysophosphatidylcholine generated in the LCAT reaction, as well as plasma free fatty acids, are bound to lipoproteins in NAR plasma. A study was carried out to determine whether the elevated LDL and aopoE-rich HDL levels could be corrected by administration of the HMG-CoA reductase inhibitor pravastatin (at a dose of 1 mg/kg per day). Pravastatin treatment results in a 43% decrease in plasma triglycerides in NAR, but not in Sprague-Dawley (SDR) rats, and had no significant effect on plasma total cholesterol, phospholipids apolipoproteins A-I, A-IV, B, or E, as well as on plasma LCAT activity levels in NAR or SDR. FAU - Van Tol, A AU - Van Tol A AD - Department of Biochemistry, Erasmus University, Rotterdam, The Netherlands. FAU - Jansen, E H AU - Jansen EH FAU - Koomans, H A AU - Koomans HA FAU - Joles, J A AU - Joles JA LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - J Lipid Res JT - Journal of lipid research JID - 0376606 RN - 0 (Apolipoproteins) RN - 0 (Fatty Acids, Nonesterified) RN - 0 (Phospholipids) RN - EC 2.3.1.43 (Phosphatidylcholine-Sterol O-Acyltransferase) RN - KXO2KT9N0G (Pravastatin) SB - IM MH - Animals MH - Apolipoproteins/*blood MH - Chromatography, Gel MH - Electrophoresis, Polyacrylamide Gel MH - Fatty Acids, Nonesterified/blood MH - Female MH - Hyperlipoproteinemias/*blood MH - Phosphatidylcholine-Sterol O-Acyltransferase/*metabolism MH - Phospholipids/blood MH - Pravastatin/*pharmacology MH - Rats MH - Rats, Inbred Strains EDAT- 1991/11/01 00:00 MHDA- 1991/11/01 00:01 CRDT- 1991/11/01 00:00 PHST- 1991/11/01 00:00 [pubmed] PHST- 1991/11/01 00:01 [medline] PHST- 1991/11/01 00:00 [entrez] AID - S0022-2275(20)41627-X [pii] PST - ppublish SO - J Lipid Res. 1991 Nov;32(11):1719-28.