PMID- 30854963 OWN - NLM STAT- MEDLINE DCOM- 20200609 LR - 20200609 IS - 1875-5666 (Electronic) IS - 1566-5240 (Linking) VI - 19 IP - 2 DP - 2019 TI - Negative Correlation Between Serum Levels of Homocysteine and Apolipoprotein M. PG - 120-126 LID - 10.2174/1566524019666190308115624 [doi] AB - BACKGROUND: Homocysteine (Hcy) has been suggested as an independent risk factor for atherosclerosis. Apolipoprotein M (apoM) is a constituent of the HDL particles. The goal of this study was to examine the serum levels of homocysteine and apoM and to determine whether homocysteine influences apoM synthesis. METHODS: Serum levels of apoM and Hcy in 17 hyperhomocysteinemia (HHcy) patients and 19 controls were measured and their correlations were analyzed. Different concentrations of homocysteine (Hcy) and LY294002, a specific phosphoinositide 3- kinase (PI3K) inhibitor, were used to treat HepG2 cells. The mRNA levels were determined by RT-PCR and the apoM protein mass was measured by western blot. RESULTS: We found that decreased serum apoM levels corresponded with serum HDL levels in HHcy patients, while the serum apoM levels showed a statistically significant negative correlation with the serum Hcy levels. Moreover, apoM mRNA and protein levels were significantly decreased after the administration of Hcy in HepG2 cells, and this effect could be abolished by addition of LY294002. CONCLUSIONS: Present study demonstrates that Hcy downregulates the expression of apoM by mechanisms involving the PI3K signal pathway. CI - Copyright(c) Bentham Science Publishers; For any queries, please email at epub@benthamscience.net. FAU - Wei, J AU - Wei J AD - Department of Comprehensive Laboratory, the Third Affiliated Hospital of Soochow University, Changzhou 213003, China. FAU - Yu, Y AU - Yu Y AD - Department of Comprehensive Laboratory, the Third Affiliated Hospital of Soochow University, Changzhou 213003, China. FAU - Feng, Y AU - Feng Y AD - Department of Comprehensive Laboratory, the Third Affiliated Hospital of Soochow University, Changzhou 213003, China. FAU - Zhang, J AU - Zhang J AD - Department of Comprehensive Laboratory, the Third Affiliated Hospital of Soochow University, Changzhou 213003, China. FAU - Jiang, Q AU - Jiang Q AD - Department of Laboratory Medicine, the Third Affiliated Hospital of Soochow University, Changzhou 213003, China. FAU - Zheng, L AU - Zheng L AD - Department of Comprehensive Laboratory, the Third Affiliated Hospital of Soochow University, Changzhou 213003, China. FAU - Zhang, X AU - Zhang X AD - Cardiothoracic Surgery, the Third Affiliated Hospital of Soochow University, Changzhou 213003, China. FAU - Xu, N AU - Xu N AD - Division of Clinical Chemistry and Pharmacology, Department of Laboratory Medicine, Lunds University, S-221 85 Lund, Sweden. FAU - Luo, G AU - Luo G AD - Department of Comprehensive Laboratory, the Third Affiliated Hospital of Soochow University, Changzhou 213003, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Curr Mol Med JT - Current molecular medicine JID - 101093076 RN - 0 (Apolipoproteins M) RN - 0 (Lipoproteins, HDL) RN - 0 (RNA, Messenger) RN - 0LVT1QZ0BA (Homocysteine) RN - EC 2.7.11.1 (AKT1 protein, human) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) SB - IM MH - Apolipoproteins M/genetics/*metabolism MH - Case-Control Studies MH - Female MH - Hep G2 Cells MH - Homocysteine/*blood MH - Humans MH - Hyperhomocysteinemia/blood/genetics/*pathology MH - Lipoproteins, HDL/blood MH - Male MH - Middle Aged MH - Phosphatidylinositol 3-Kinases/genetics/metabolism MH - Proto-Oncogene Proteins c-akt/genetics/metabolism MH - RNA, Messenger/genetics/*metabolism OTO - NOTNLM OT - Homocysteine OT - PI3K OT - apolipoprotein M OT - cardiovascular diseases OT - hyperhomocysteinemia OT - lipid metabolism. EDAT- 2019/03/12 06:00 MHDA- 2020/06/10 06:00 CRDT- 2019/03/12 06:00 PHST- 2018/09/30 00:00 [received] PHST- 2019/02/20 00:00 [revised] PHST- 2019/02/22 00:00 [accepted] PHST- 2019/03/12 06:00 [pubmed] PHST- 2020/06/10 06:00 [medline] PHST- 2019/03/12 06:00 [entrez] AID - CMM-EPUB-97174 [pii] AID - 10.2174/1566524019666190308115624 [doi] PST - ppublish SO - Curr Mol Med. 2019;19(2):120-126. doi: 10.2174/1566524019666190308115624.