PMID- 30504707 OWN - NLM STAT- MEDLINE DCOM- 20190121 LR - 20190212 IS - 1421-9778 (Electronic) IS - 1015-8987 (Linking) VI - 51 IP - 4 DP - 2018 TI - Ciliary Neurotrophic Factor (CNTF) Protects Myocardial Cells from Oxygen Glucose Deprivation (OGD)/Re-Oxygenation via Activation of Akt-Nrf2 Signaling. PG - 1852-1862 LID - 10.1159/000495711 [doi] AB - BACKGROUND/AIMS: Oxygen glucose deprivation (OGD)/re-oxygenation (OGDR) exposure to myocardial cells mimics ischemia-reperfusion injuries. We studied the potential activity of ciliary neurotrophic factor (CNTF) on OGDR-treated myocardial cells. METHODS: CNTF and CNTFR expression were tested by RT-PCR assay and Western blotting assay. Cell viability and death were tested by MTT assay and LDH release assay, respectively. Akt-Nrf2 signalings were tested by Western blotting assay and qPCR assay. RESULTS: CNTF and its receptor CNTFR were functionally expressed in established H9c2 myocardial cells and primary murine myocardiocytes. Pretreatment of CNTF significantly attenuated OGDR-induced viability reduction and death in myocardial cells. Further studies show that in the myocardial cells CNTF activated NF-E2-related factor 2 (Nrf2) signaling to inhibit OGDR-induced reactive oxygen species (ROS) production and programmed necrosis, preventing adenine nucleotide translocator 1 (ANT-1)-p53-cyclophilin D (Cyp-D) mitochondrial association and mitochondrial depolarization. Nrf2 silencing or knockout almost abolished CNTF-induced H9c2 cytoprotection against OGDR. CNTF activated Akt in H9c2 cells and primary murine myocardiocytes. Conversely, Akt blockage by the pharmacological inhibitors not only blocked CNTF-induced Nrf2 Ser-40 phosphorylation and activation, but also nullified anti-OGDR actions by CNTF in myocardial cells. CONCLUSION: CNTF activates Akt-Nrf2 signaling to protect myocardial cells from OGDR. CI - (c) 2018 The Author(s). Published by S. Karger AG, Basel. FAU - Zheng, Koulong AU - Zheng K FAU - Zhang, Qing AU - Zhang Q FAU - Sheng, Zhenqiang AU - Sheng Z FAU - Li, Yefei AU - Li Y FAU - Lu, Hui-He AU - Lu HH LA - eng PT - Journal Article DEP - 20181130 PL - Germany TA - Cell Physiol Biochem JT - Cellular physiology and biochemistry : international journal of experimental cellular physiology, biochemistry, and pharmacology JID - 9113221 RN - 0 (Ciliary Neurotrophic Factor) RN - 0 (NF-E2-Related Factor 2) RN - 0 (Nfe2l2 protein, mouse) RN - 0 (Nfe2l2 protein, rat) RN - EC 2.7.11.1 (Proto-Oncogene Proteins c-akt) RN - IY9XDZ35W2 (Glucose) RN - S88TT14065 (Oxygen) SB - IM MH - Animals MH - Cell Death MH - Cell Line MH - Cell Survival MH - Cells, Cultured MH - Ciliary Neurotrophic Factor/*metabolism MH - Glucose/metabolism MH - Mice, Inbred C57BL MH - Myocardial Reperfusion Injury/*metabolism/pathology MH - Myocytes, Cardiac/cytology/*metabolism/pathology MH - NF-E2-Related Factor 2/*metabolism MH - Oxidative Stress MH - Oxygen/metabolism MH - Proto-Oncogene Proteins c-akt/*metabolism MH - Rats MH - *Signal Transduction OTO - NOTNLM OT - Akt OT - CNTF OT - Ischemic heart diseases OT - Myocardial cells OT - Nrf2 OT - Oxygen glucose deprivation (OGD) EDAT- 2018/12/07 06:00 MHDA- 2019/01/22 06:00 CRDT- 2018/12/04 06:00 PHST- 2018/05/17 00:00 [received] PHST- 2018/11/23 00:00 [accepted] PHST- 2018/12/07 06:00 [pubmed] PHST- 2019/01/22 06:00 [medline] PHST- 2018/12/04 06:00 [entrez] AID - 000495711 [pii] AID - 10.1159/000495711 [doi] PST - ppublish SO - Cell Physiol Biochem. 2018;51(4):1852-1862. doi: 10.1159/000495711. Epub 2018 Nov 30.