PMID- 24267259 OWN - NLM STAT- MEDLINE DCOM- 20140728 LR - 20181202 IS - 1879-1484 (Electronic) IS - 0021-9150 (Linking) VI - 231 IP - 2 DP - 2013 Dec TI - Impact of serum amyloid A on cellular cholesterol efflux to serum in type 2 diabetes mellitus. PG - 405-10 LID - S0021-9150(13)00608-4 [pii] LID - 10.1016/j.atherosclerosis.2013.10.008 [doi] AB - OBJECTIVE: Serum amyloid A (SAA) is an acute phase response protein and has apolipoprotein properties. Since type 2 diabetes is associated with chronic subclinical inflammation, the objective of this study is to investigate the changes in SAA level in type 2 diabetic patients and to evaluate the relationship between SAA and the capacity of serum to induce cellular cholesterol efflux via the two known cholesterol transporters, scavenger receptor class B type I (SR-BI) and ATP-binding cassette transporter G1 (ABCG1). METHODS: 264 patients with type 2 diabetes mellitus (42% with normoalbuminuria, 30% microalbuminuria, and 28% proteinuria) and 275 non-diabetic controls were recruited. SAA was measured by ELISA. SR-BI and ABCG1-mediated cholesterol efflux to serum were determined by measuring the transfer of [(3)H]cholesterol from Fu5AH rat hepatoma cells expressing SR-BI and from human ABCG1-transfected CHO-K1 cells to the medium containing the tested serum respectively. RESULTS: SAA was significantly increased in diabetic patients with incipient or overt nephropathy. Both SR-BI and ABCG1-mediated cholesterol efflux to serum were significantly impaired in all three groups of diabetic patients (p < 0.01). SAA inversely correlated with SR-BI-mediated cholesterol efflux (r = -0.36, p < 0.01) but did not correlate with ABCG1-mediated cholesterol efflux. Stepwise linear regression analysis showed that HDL, the presence or absence of diabetes, and log(SAA) were significant independent determinants of SR-BI-mediated cholesterol efflux to serum. CONCLUSION: SAA was increased in type 2 diabetic patients with incipient or overt nephropathy, and SAA was associated with impairment of SR-BI-mediated cholesterol efflux to serum. CI - Copyright (c) 2013 Elsevier Ireland Ltd. All rights reserved. FAU - Tsun, J G S AU - Tsun JG AD - Department of Medicine, University of Hong Kong, Queen Mary Hospital, Pokfulam Road, Hong Kong. FAU - Shiu, S W M AU - Shiu SW FAU - Wong, Y AU - Wong Y FAU - Yung, S AU - Yung S FAU - Chan, T M AU - Chan TM FAU - Tan, K C B AU - Tan KC LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20131018 PL - Ireland TA - Atherosclerosis JT - Atherosclerosis JID - 0242543 RN - 0 (ABCG1 protein, human) RN - 0 (ATP Binding Cassette Transporter, Subfamily G, Member 1) RN - 0 (ATP-Binding Cassette Transporters) RN - 0 (Apolipoproteins) RN - 0 (Cholesterol, HDL) RN - 0 (SCARB1 protein, human) RN - 0 (Scavenger Receptors, Class B) RN - 0 (Serum Amyloid A Protein) RN - 97C5T2UQ7J (Cholesterol) SB - IM MH - ATP Binding Cassette Transporter, Subfamily G, Member 1 MH - ATP-Binding Cassette Transporters/*blood MH - Adult MH - Aged MH - Animals MH - Apolipoproteins/*blood MH - CHO Cells MH - Cell Line, Tumor MH - Cholesterol/*blood MH - Cholesterol, HDL/blood MH - Cricetinae MH - Cricetulus MH - Diabetes Complications/blood MH - Diabetes Mellitus, Type 2/*blood MH - Enzyme-Linked Immunosorbent Assay MH - Female MH - Humans MH - Linear Models MH - Male MH - Middle Aged MH - Rats MH - Scavenger Receptors, Class B/*blood MH - Serum Amyloid A Protein/*metabolism OTO - NOTNLM OT - ATP-binding cassette transporter G1 OT - Cellular cholesterol efflux OT - High density lipoprotein OT - Reverse cholesterol transport OT - Scavenger receptor class B type I OT - Serum amyloid A EDAT- 2013/11/26 06:00 MHDA- 2014/07/30 06:00 CRDT- 2013/11/26 06:00 PHST- 2013/05/15 00:00 [received] PHST- 2013/09/07 00:00 [revised] PHST- 2013/10/10 00:00 [accepted] PHST- 2013/11/26 06:00 [entrez] PHST- 2013/11/26 06:00 [pubmed] PHST- 2014/07/30 06:00 [medline] AID - S0021-9150(13)00608-4 [pii] AID - 10.1016/j.atherosclerosis.2013.10.008 [doi] PST - ppublish SO - Atherosclerosis. 2013 Dec;231(2):405-10. doi: 10.1016/j.atherosclerosis.2013.10.008. Epub 2013 Oct 18.