PMID- 25981750 OWN - NLM STAT- MEDLINE DCOM- 20161018 LR - 20221207 IS - 1464-5491 (Electronic) IS - 0742-3071 (Linking) VI - 33 IP - 1 DP - 2016 Jan TI - Elevated serum monocyte chemoattractant protein-1 levels and its genetic polymorphism is associated with diabetic retinopathy in Chinese patients with Type 2 diabetes. PG - 84-90 LID - 10.1111/dme.12804 [doi] AB - AIM: Previous studies have reported that monocyte chemoattractant protein-1 (MCP-1) is involved in inflammatory and metabolic diseases. The purpose of this study is to investigate the role of MCP-1 in the pathogenesis of diabetic retinopathy (DR) in Han Chinese patients with Type 2 diabetes. METHODS: Serum levels of MCP-1 protein in patients classified as diabetic without retinopathy (DWR) and DR, including NPDR and PDR, were assayed by enzyme-linked immunosorbent assay. Genomic DNA from 198 DWR patients, 176 NPDR patients and 143 PDR patients were genotyped by using a PCR restriction fragment length polymorphism (PCR-RFLP) assay. RESULTS: MCP-1 serum levels were significantly higher in NPDR and PDR patients than in the DWR patients. The frequencies of the GG genotype and G allele of the single nucleotide polymorphism (SNP) were significantly increased in DR patients compared with DWR patients. Further subgroup analysis was performed to test whether there was an association between the PDR or NPDR and DWR groups. Significantly higher frequencies of the GG genotype and G allele were observed in PDR and NPDR patients compared with DWR patients. Furthermore, the 25 patients with PDR were divided into three groups according to the genotype of the tested SNP. The expression of the MCP-1 gene was higher in the GG genotype group compared with the other two groups. CONCLUSIONS: The results suggested that the -2518 GG genotype and G allele of MCP-1 are associated with an increased risk of PDR in the Chinese Han population. This polymorphism may influence the expression of the MCP-1 gene, which may play an important role in the pathogenesis of DR. CI - (c) 2015 The Authors. Diabetic Medicine (c) 2015 Diabetes UK. FAU - Jiang, Z AU - Jiang Z AD - Department of Ophthalmology, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China. FAU - Hennein, L AU - Hennein L AD - Department of Ophthalmology, University of California San Francisco, San Francisco, USA. AD - University of California San Francisco, School of Medicine, San Francisco, USA. FAU - Xu, Y AU - Xu Y AD - Department of Ophthalmology, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China. FAU - Bao, N AU - Bao N AD - Department of Ophthalmology, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China. FAU - Coh, P AU - Coh P AD - Department of Ophthalmology, University of California San Francisco, San Francisco, USA. FAU - Tao, L AU - Tao L AD - Department of Ophthalmology, Second Affiliated Hospital of Anhui Medical University, Hefei, Anhui, China. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20150613 PL - England TA - Diabet Med JT - Diabetic medicine : a journal of the British Diabetic Association JID - 8500858 RN - 0 (5' Untranslated Regions) RN - 0 (CCL2 protein, human) RN - 0 (Chemokine CCL2) SB - IM MH - *5' Untranslated Regions MH - Adult MH - Alleles MH - Asian People MH - Case-Control Studies MH - Chemokine CCL2/blood/*genetics/metabolism MH - China MH - Diabetes Mellitus, Type 2/blood/*complications/immunology/metabolism MH - Diabetic Retinopathy/blood/*genetics/immunology/metabolism MH - Enzyme-Linked Immunosorbent Assay MH - Female MH - Gene Expression Regulation MH - Genetic Association Studies MH - *Genetic Predisposition to Disease MH - Hospitals, University MH - Humans MH - Male MH - Middle Aged MH - Polymorphism, Restriction Fragment Length MH - *Polymorphism, Single Nucleotide MH - *Up-Regulation EDAT- 2015/05/20 06:00 MHDA- 2016/10/19 06:00 CRDT- 2015/05/19 06:00 PHST- 2015/05/13 00:00 [accepted] PHST- 2015/05/19 06:00 [entrez] PHST- 2015/05/20 06:00 [pubmed] PHST- 2016/10/19 06:00 [medline] AID - 10.1111/dme.12804 [doi] PST - ppublish SO - Diabet Med. 2016 Jan;33(1):84-90. doi: 10.1111/dme.12804. Epub 2015 Jun 13.