PMID- 20491656 OWN - NLM STAT- MEDLINE DCOM- 20100916 LR - 20211020 IS - 1470-8736 (Electronic) IS - 0143-5221 (Print) IS - 0143-5221 (Linking) VI - 119 IP - 7 DP - 2010 Jun 22 TI - Overexpression of STARD3 in human monocyte/macrophages induces an anti-atherogenic lipid phenotype. PG - 265-72 LID - 10.1042/CS20100266 [doi] AB - Dysregulated macrophage cholesterol homoeostasis lies at the heart of early and developing atheroma, and removal of excess cholesterol from macrophage foam cells, by efficient transport mechanisms, is central to stabilization and regression of atherosclerotic lesions. The present study demonstrates that transient overexpression of STARD3 START [StAR (steroidogenic acute regulatory protein)-related lipid transfer] domain 3; also known as MLN64 (metastatic lymph node 64), an endosomal cholesterol transporter and member of the 'START' family of lipid trafficking proteins, induces significant increases in macrophage ABCA1 (ATP-binding cassette transporter A1) mRNA and protein, enhances [(3)H]cholesterol efflux to apo (apolipoprotein) AI, and reduces biosynthesis of cholesterol, cholesteryl ester, fatty acids, triacylglycerol and phospholipids from [(14)C]acetate, compared with controls. Notably, overexpression of STARD3 prevents increases in cholesterol esterification in response to acetylated LDL (low-density lipoprotein), blocking cholesteryl ester deposition. Thus enhanced endosomal trafficking via STARD3 induces an anti-atherogenic macrophage lipid phenotype, positing a potentially therapeutic strategy. FAU - Borthwick, Faye AU - Borthwick F AD - Vascular Biology Group, Department of Biological and Biomedical Sciences, Glasgow Caledonian University, Glasgow G4 0BA, UK. FAU - Allen, Anne-Marie AU - Allen AM FAU - Taylor, Janice M AU - Taylor JM FAU - Graham, Annette AU - Graham A LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20100622 PL - England TA - Clin Sci (Lond) JT - Clinical science (London, England : 1979) JID - 7905731 RN - 0 (Carrier Proteins) RN - 0 (Membrane Proteins) RN - 0 (RNA, Messenger) RN - 0 (STARD3 protein, human) SB - IM MH - Aorta/metabolism MH - Atherosclerosis/*metabolism MH - Carrier Proteins/*biosynthesis/genetics MH - Cells, Cultured MH - Foam Cells/metabolism MH - Gene Expression Regulation/physiology MH - Humans MH - Lipid Metabolism/*physiology MH - Macrophages/*metabolism MH - Membrane Proteins/*biosynthesis/genetics MH - Monocytes/*metabolism MH - Phenotype MH - Polymerase Chain Reaction/methods MH - RNA, Messenger/genetics PMC - PMC2891001 EDAT- 2010/05/25 06:00 MHDA- 2010/09/18 06:00 PMCR- 2010/06/22 CRDT- 2010/05/25 06:00 PHST- 2010/05/25 06:00 [entrez] PHST- 2010/05/25 06:00 [pubmed] PHST- 2010/09/18 06:00 [medline] PHST- 2010/06/22 00:00 [pmc-release] AID - CS20100266 [pii] AID - cs1190265 [pii] AID - 10.1042/CS20100266 [doi] PST - epublish SO - Clin Sci (Lond). 2010 Jun 22;119(7):265-72. doi: 10.1042/CS20100266.