PMID- 26521941 OWN - NLM STAT- MEDLINE DCOM- 20170124 LR - 20190609 IS - 1976-670X (Electronic) IS - 1976-6696 (Print) IS - 1976-6696 (Linking) VI - 49 IP - 4 DP - 2016 Apr TI - miR-185 inhibits endoplasmic reticulum stress-induced apoptosis by targeting Na+/H+ exchanger-1 in the heart. PG - 208-13 AB - Prolonged ER stress (ERS) can be associated with the induction of apoptotic cell death in various heart diseases. In this study, we searched for microRNAs affecting ERS in the heart using in silico and in vitro methods. We found that miR-185 directly targets the 3'-untranslated region of Na+/H+ exchanger-1 (NHE-1), a protein involved in ERS. Cardiomyocyte ERS-triggered apoptosis induced by 100 ng/ml tunicamycin (TM) or 1 muM thapsigargin (TG), ERS inducers, was significantly reduced by miR-185 overexpression. Protein expression of pro-apoptotic markers such as CCAAT/enhancer-binding protein homologous protein (CHOP) and cleaved-caspase-3 was also markedly reduced by miR-185 in a dose-dependent manner. Cariporide (20 muM), a pharmacological inhibitor of NHE-1, also attenuated ERS-induced apoptosis in cardiomyocytes and CHOP protein expression, suggesting that NHE-1 plays an important role in ERS-associated apoptosis in cardiomyocytes. Collectively, the present results demonstrate that miR-185 is involved in cardio- protection against ERS-mediated apoptotic cell death. [BMB Reports 2016; 49(4): 208-213]. FAU - Kim, Jin Ock AU - Kim JO AD - School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea. FAU - Kwon, Eun Jeong AU - Kwon EJ AD - School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea. FAU - Song, Dong Woo AU - Song DW AD - School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea. FAU - Lee, Jong Sub AU - Lee JS AD - School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea. FAU - Kim, Do Han AU - Kim DH AD - School of Life Sciences and Systems Biology Research Center, Gwangju Institute of Science and Technology (GIST), Gwangju 61005, Korea. LA - eng PT - News PL - Korea (South) TA - BMB Rep JT - BMB reports JID - 101465334 RN - 0 (3' Untranslated Regions) RN - 0 (MIRN185 microRNA, rat) RN - 0 (MicroRNAs) RN - 0 (Slc9a1 protein, rat) RN - 0 (Sodium-Hydrogen Exchanger 1) RN - 0 (Sodium-Hydrogen Exchangers) SB - IM MH - 3' Untranslated Regions/genetics MH - Animals MH - *Apoptosis/genetics MH - Base Sequence MH - Binding Sites MH - *Endoplasmic Reticulum Stress MH - MicroRNAs/genetics/*metabolism MH - Myocardium/*metabolism MH - Myocytes, Cardiac/cytology/metabolism MH - Protein Binding MH - Rats MH - Sodium-Hydrogen Exchanger 1 MH - Sodium-Hydrogen Exchangers/antagonists & inhibitors/genetics/*metabolism PMC - PMC4915239 EDAT- 2015/11/03 06:00 MHDA- 2017/01/25 06:00 PMCR- 2016/05/30 CRDT- 2015/11/03 06:00 PHST- 2015/09/24 00:00 [received] PHST- 2015/11/03 06:00 [entrez] PHST- 2015/11/03 06:00 [pubmed] PHST- 2017/01/25 06:00 [medline] PHST- 2016/05/30 00:00 [pmc-release] AID - 3347 [pii] AID - BMB-49-208 [pii] AID - 10.5483/bmbrep.2016.49.4.193 [doi] PST - ppublish SO - BMB Rep. 2016 Apr;49(4):208-13. doi: 10.5483/bmbrep.2016.49.4.193.