PMID- 15492319 OWN - NLM STAT- MEDLINE DCOM- 20050930 LR - 20191210 IS - 1524-4539 (Electronic) IS - 0009-7322 (Linking) VI - 110 IP - 18 DP - 2004 Nov 2 TI - Cellular physiology of cholesterol efflux in vascular endothelial cells. PG - 2881-8 AB - BACKGROUND: Of the cells that compose the atherosclerotic plaque, vascular endothelial cells are the most resistant to cholesterol accumulation. Cholesterol efflux pathways may play an important role in endothelial cholesterol homeostasis. METHODS AND RESULTS: We examined the global genetic response of endothelial cells to cholesterol and in particular the contribution of the cholesterol efflux proteins ATP-binding cassette transporter A1 (ABCA1), ATP-binding cassette transporter G1 (ABCG1), and scavenger receptor B-I (SR-BI) to endothelial cell cholesterol efflux. The ABCG1 gene is induced in endothelial cells by cholesterol, whereas ABCA1 is not. Using specific chemical inhibitors of ABC transporters and SR-BI, we have shown that neither ABC transporters nor SR-BI is required for apolipoprotein A-1-mediated endothelial cholesterol efflux. CONCLUSIONS: Endothelial cells may use nontraditional pathways for cholesterol efflux. FAU - O'Connell, Brian J AU - O'Connell BJ AD - Cardiovascular Genetics Laboratory, McGill University Health Centre, Royal Victoria Hospital, Montreal, Quebec, Canada. FAU - Denis, Maxime AU - Denis M FAU - Genest, Jacques AU - Genest J LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20041018 PL - United States TA - Circulation JT - Circulation JID - 0147763 RN - 0 (ABCA1 protein, human) RN - 0 (ABCG1 protein, human) RN - 0 (ATP Binding Cassette Transporter 1) RN - 0 (ATP Binding Cassette Transporter, Subfamily G, Member 1) RN - 0 (ATP-Binding Cassette Transporters) RN - 0 (Apolipoprotein A-I) RN - 0 (CD36 Antigens) RN - 0 (Hydroxycholesterols) RN - 0 (Lipoproteins, HDL) RN - 0 (Lipoproteins, HDL3) RN - 0 (Receptors, Immunologic) RN - 0 (Receptors, Scavenger) RN - 0 (Recombinant Fusion Proteins) RN - 17711-16-9 (22-hydroxycholesterol) RN - 23583-48-4 (8-Bromo Cyclic Adenosine Monophosphate) RN - 27432CM55Q (Serum Albumin, Bovine) RN - 97C5T2UQ7J (Cholesterol) RN - SX6K58TVWC (Glyburide) SB - IM MH - 8-Bromo Cyclic Adenosine Monophosphate/pharmacology MH - ATP Binding Cassette Transporter 1 MH - ATP Binding Cassette Transporter, Subfamily G, Member 1 MH - ATP-Binding Cassette Transporters/antagonists & inhibitors/genetics/metabolism MH - Animals MH - Aorta MH - Apolipoprotein A-I/pharmacology MH - CD36 Antigens MH - COS Cells MH - Cattle MH - Cells, Cultured/drug effects/metabolism MH - Chlorocebus aethiops MH - Cholesterol/*metabolism/pharmacology MH - Endothelial Cells/drug effects/*metabolism MH - Endothelium, Vascular/cytology/*physiology MH - Fibroblasts/drug effects/metabolism/pathology MH - Gene Expression Profiling MH - Gene Expression Regulation/drug effects MH - Glyburide/pharmacology MH - Humans MH - Hydroxycholesterols/pharmacology MH - Lipoproteins, HDL/pharmacology MH - Lipoproteins, HDL3 MH - Oligonucleotide Array Sequence Analysis MH - Receptors, Immunologic/antagonists & inhibitors/genetics/metabolism MH - Receptors, Scavenger MH - Recombinant Fusion Proteins/physiology MH - Serum Albumin, Bovine/pharmacology MH - Tangier Disease/genetics/pathology MH - Transfection MH - Umbilical Veins EDAT- 2004/10/20 09:00 MHDA- 2005/10/01 09:00 CRDT- 2004/10/20 09:00 PHST- 2004/10/20 09:00 [pubmed] PHST- 2005/10/01 09:00 [medline] PHST- 2004/10/20 09:00 [entrez] AID - 01.CIR.0000146333.20727.2B [pii] AID - 10.1161/01.CIR.0000146333.20727.2B [doi] PST - ppublish SO - Circulation. 2004 Nov 2;110(18):2881-8. doi: 10.1161/01.CIR.0000146333.20727.2B. Epub 2004 Oct 18.