PMID- 30907023 OWN - NLM STAT- MEDLINE DCOM- 20190508 LR - 20211204 IS - 1099-0844 (Electronic) IS - 0263-6484 (Linking) VI - 37 IP - 3 DP - 2019 Apr TI - Telmisartan protects against high glucose/high lipid-induced apoptosis and insulin secretion by reducing the oxidative and ER stress. PG - 161-168 LID - 10.1002/cbf.3383 [doi] AB - Telmisartan, an angiotensin II receptor blocker, has been widely used for hypertension. It has also been reported to improve insulin sensitivity in animal models of obesity and diabetic patients by targeting to the peroxisome proliferator-activated receptor (PPAR)-gamma. High glucose/high lipid (HG/HL)-induced apoptosis of pancreatic beta-cells impairs its function of insulin secretion and is generally believed to be the key factor in the development of diabetes. In this study, we investigated whether telmisartan exerted a protective effect against HG/HL-induced apoptosis and insulin secretion in vitro as well as in vivo; 10-muM telmisartan treatment significantly reduced HG (25 mM) or/and HL (0.4 mM palmitic acid) induced-cell apoptosis and greatly improved insulin secretion in INS-1 pancreatic beta-cells, which is consistent in an obesity rat model induced by HG/HL diets. Furthermore, telmisartan treatment markedly reduced the protein level of GRP78, CHOP, and caspase 12, while increasing anti-apoptotic Bcl-2 protein expression. Moreover, telmisartan treatment significantly reduced intracellular ROS levels. Mechanistically, we demonstrated that PPARgamma signaling pathway may be involved in the telmisartan protective effects, which were blocked by a PPARgamma blocker, GW9662. In conclusion, the protective effect of telmisartan was mediated by an anti-ER stress-induced apoptotic and anti-oxidative pathway. SIGNIFICANCE OF THIS STUDY: Type 2 diabetes mellitus (T2DM) is a chronic metabolic disorder worldwide pathologically characterized by hyperglycemia and insulin resistance. Long-term high glucose in the blood has been proposed to induce pancreatic beta-cell loss and is generally believed to be the key factor in the development of diabetes. In the present study, we demonstrated that telmisartan, a common drug used for hypertension treatment, has a protective effect against high glucose/high lipid-induced cell apoptosis and greatly improves the insulin secretion function by inhibiting the oxidative stress and ER stress. Furthermore, this protective effect of telmisartan is mediated by the PPAR-gamma signal pathway, which may provide a potential strategy against T2DM. CI - (c) 2019 John Wiley & Sons, Ltd. FAU - Wang, Yan AU - Wang Y AUID- ORCID: 0000-0002-1916-0958 AD - Department of Endocrinology, The First Hospital of Shanxi Medical University, Taiyuan, Shan Xi, China. FAU - Xue, Jingjing AU - Xue J AUID- ORCID: 0000-0002-7327-2352 AD - Department of Endocrinology, The First Hospital of Shanxi Medical University, Taiyuan, Shan Xi, China. FAU - Li, Yan AU - Li Y AUID- ORCID: 0000-0003-3781-5396 AD - Department of Endocrinology, The First Hospital of Shanxi Medical University, Taiyuan, Shan Xi, China. FAU - Zhou, Xin AU - Zhou X AUID- ORCID: 0000-0002-2940-1356 AD - Department of Pathophysiology, Shanxi Medical University, Taiyuan, Shan Xi, China. FAU - Qiao, Shun AU - Qiao S AUID- ORCID: 0000-0003-1121-4170 AD - Department of Endocrinology, The First Hospital of Shanxi Medical University, Taiyuan, Shan Xi, China. FAU - Han, Dewu AU - Han D AUID- ORCID: 0000-0002-2497-7495 AD - Department of Pathophysiology, Shanxi Medical University, Taiyuan, Shan Xi, China. LA - eng GR - 2017037/Health Commission of Shanxi Province, China/ PT - Journal Article DEP - 20190325 PL - England TA - Cell Biochem Funct JT - Cell biochemistry and function JID - 8305874 RN - 0 (2-chloro-5-nitrobenzanilide) RN - 0 (Anilides) RN - 0 (Antihypertensive Agents) RN - 0 (Endoplasmic Reticulum Chaperone BiP) RN - 0 (HSPA5 protein, human) RN - 0 (Insulin) RN - 0 (Lipids) RN - 0 (PPAR gamma) RN - 0 (Reactive Oxygen Species) RN - IY9XDZ35W2 (Glucose) RN - U5SYW473RQ (Telmisartan) SB - IM MH - Anilides/pharmacology MH - Antihypertensive Agents/pharmacology MH - Apoptosis/*drug effects MH - Cell Survival/drug effects MH - Cells, Cultured MH - Dose-Response Relationship, Drug MH - Endoplasmic Reticulum Chaperone BiP MH - Endoplasmic Reticulum Stress/*drug effects MH - Glucose/*antagonists & inhibitors/pharmacology MH - Humans MH - Insulin/*metabolism MH - Insulin-Secreting Cells/drug effects/metabolism MH - Lipids/*antagonists & inhibitors/pharmacology MH - Oxidative Stress/*drug effects MH - PPAR gamma/antagonists & inhibitors/metabolism MH - Reactive Oxygen Species/antagonists & inhibitors/metabolism MH - Structure-Activity Relationship MH - Telmisartan/antagonists & inhibitors/*pharmacology OTO - NOTNLM OT - ER stress OT - apoptosis OT - high glucose/high lipid OT - insulin secretion OT - oxidative stress OT - telmisartan EDAT- 2019/03/25 06:00 MHDA- 2019/05/09 06:00 CRDT- 2019/03/26 06:00 PHST- 2018/04/10 00:00 [received] PHST- 2019/01/14 00:00 [revised] PHST- 2019/01/29 00:00 [accepted] PHST- 2019/03/25 06:00 [pubmed] PHST- 2019/05/09 06:00 [medline] PHST- 2019/03/26 06:00 [entrez] AID - 10.1002/cbf.3383 [doi] PST - ppublish SO - Cell Biochem Funct. 2019 Apr;37(3):161-168. doi: 10.1002/cbf.3383. Epub 2019 Mar 25.