PMID- 30575933 OWN - NLM STAT- MEDLINE DCOM- 20200113 LR - 20200113 IS - 2284-0729 (Electronic) IS - 1128-3602 (Linking) VI - 22 IP - 24 DP - 2018 Dec TI - ICOS/ICOSL upregulation mediates inflammatory response and endothelial dysfunction in type 2 diabetes mellitus. PG - 8898-8908 LID - 16659 [pii] LID - 10.26355/eurrev_201812_16659 [doi] AB - OBJECTIVE: ICOS/ICOSL plays a crucial part in various disease-mediated immune responses. However, the exact role of ICOS/ICOSL in type 2 diabetes mellitus (T2DM) development remains unexplored. This study aims to investigate the role of ICOS/ICOSL in the pathogenesis of T2DM. MATERIALS AND METHODS: Human peripheral blood T-lymphocytes (CD3) and umbilical vein endothelial cells (HUVECs) were treated with high-glucose (HG) or advanced glycation end products (AGEs). A portion of CD3 cells was co-cultured with HUVECs and treated with different mediums or anti-ICOS mAbs. The ICOS/ICOSL and caspase-3 protein expression was measured by Western blotting. ELISA (enzyme-linked immunosorbent assay), MTT (3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide), and NOx production assays were respectively used to detect cytokines level, cell viability and the production of NOx. RESULTS: HG and AGEs significantly upregulated ICOS/ICOSL expressions in T cells and HUVECs. T cell contact with HUVECs secreted more IFN-gamma, IL-4, and IL-10 compared to non-contact cells, while cytokines from IL-6-, IL-1beta-, and CM- (the conditioned medium) treated cells did not differ from the control. A significant increase of IL-8 and IL-6 was found in HUVECs under both contact and non-contact conditions vs. control cells. Similar results were also observed in the comparison between CM1- (T cell condition medium) or CM2- (co-culture condition medium) treated cells and control cells. However, CM1 and CM2 treatment significantly inhibited cell viability and increased caspase-3 and NOx production; blocking ICOS/ICOSL remarkably decreased cytokines secretion, enhanced cell viability and reduced caspase-3 and NOx production. CONCLUSIONS: HG and AGEs cause T cell inflammatory response and vascular endothelial dysfunction by upregulating ICOS/ICOSL, which may be one of the possible mechanisms of cardiovascular complications development in T2DM patients. FAU - Zhang, H-Y AU - Zhang HY AD - Department of Geriatrics, the First People's Hospital of Yunnan Province, the Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan Province, China. rou3726@163.com. FAU - Ruan, L-B AU - Ruan LB FAU - Li, Y AU - Li Y FAU - Yang, T-R AU - Yang TR FAU - Liu, W-J AU - Liu WJ FAU - Jiang, Y-X AU - Jiang YX FAU - Li, T-R AU - Li TR FAU - Quan, J AU - Quan J FAU - Xuan, W AU - Xuan W LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Italy TA - Eur Rev Med Pharmacol Sci JT - European review for medical and pharmacological sciences JID - 9717360 RN - 0 (CD3 Complex) RN - 0 (Cytokines) RN - 0 (Glycation End Products, Advanced) RN - 0 (ICOS protein, human) RN - 0 (ICOSLG protein, human) RN - 0 (Inducible T-Cell Co-Stimulator Ligand) RN - 0 (Inducible T-Cell Co-Stimulator Protein) RN - 0 (Inflammation Mediators) RN - IY9XDZ35W2 (Glucose) SB - IM MH - CD3 Complex/metabolism MH - Cell Communication MH - Cells, Cultured MH - Coculture Techniques MH - Cytokines/immunology/*metabolism MH - Diabetes Mellitus, Type 2/blood/immunology/*metabolism MH - Endothelium, Vascular/drug effects/immunology/*metabolism MH - Glucose/toxicity MH - Glycation End Products, Advanced/toxicity MH - Human Umbilical Vein Endothelial Cells/drug effects/immunology/*metabolism MH - Humans MH - Inducible T-Cell Co-Stimulator Ligand/immunology/*metabolism MH - Inducible T-Cell Co-Stimulator Protein/immunology/*metabolism MH - Inflammation Mediators/immunology/*metabolism MH - Signal Transduction MH - T-Lymphocytes/drug effects/immunology/*metabolism EDAT- 2018/12/24 06:00 MHDA- 2020/01/14 06:00 CRDT- 2018/12/22 06:00 PHST- 2018/12/22 06:00 [entrez] PHST- 2018/12/24 06:00 [pubmed] PHST- 2020/01/14 06:00 [medline] AID - 16659 [pii] AID - 10.26355/eurrev_201812_16659 [doi] PST - ppublish SO - Eur Rev Med Pharmacol Sci. 2018 Dec;22(24):8898-8908. doi: 10.26355/eurrev_201812_16659.