PMID- 31560869 OWN - NLM STAT- MEDLINE DCOM- 20200323 LR - 20211204 IS - 1879-0712 (Electronic) IS - 0014-2999 (Linking) VI - 863 DP - 2019 Nov 15 TI - Pioglitazone protects tubular cells against hypoxia/reoxygenation injury through enhancing autophagy via AMPK-mTOR signaling pathway. PG - 172695 LID - S0014-2999(19)30647-8 [pii] LID - 10.1016/j.ejphar.2019.172695 [doi] AB - Pioglitazone (Pio), a peroxisome proliferators-activated receptor-gamma (PPAR-gamma) agonist, may protect against renal ischemia/reperfusion injury (IRI). Recent studies have shown that autophagy plays a protective role in IRI. We aimed to evaluate whether autophagy was involved in pioglitazone-induced protection during tubular cell hypoxia/reoxygenation (H/R). Normal rat kidney proximal tubular cells NRK-52E were subjected to H/R injury, and they were divided into 6 groups: control, control + Pio, H/R, H/R + Pio, H/R + MA, H/R + MA + Pio. Autophagy-related proteins were primarily assessed by Western blot and TUNEL was performed to assess cell apoptosis. Our results showed pioglitazone pretreatment had a cytoprotective effect against H/R injury. The H/R + Pio group had an increased ratio of LC3-II to LC3-I and increased Beclin-1, decreased p62. Pioglitazone also reduced apoptosis and enhanced cell survival while inducing autophagy. Correspondingly, autophagy inhibition with 3-MA alleviated this protective effect. Furthermore, pioglitazone-induced enhancement of autophagy could be related to increased AMP-activated protein kinase (AMPK) phosphorylation and decreased Mammalian target of rapamycin (mTOR) phosphorylation. Thus, pioglitazone pretreatment protects against H/R injury by enhancting autophagy through the AMPK-mTOR signaling pathway. CI - Copyright (c) 2019 Elsevier B.V. All rights reserved. FAU - Xi, Xiaoqing AU - Xi X AD - Department of Urology, The Second Affiliated Hospital of Nanchang University, Nanchang, PR China. FAU - Zou, Cong AU - Zou C AD - Department of Endocrinology, The Fourth Affiliated Hospital of Nanchang University, Nanchang, PR China. FAU - Ye, Zhenfeng AU - Ye Z AD - Department of Urology, The Second Affiliated Hospital of Nanchang University, Nanchang, PR China. FAU - Huang, Yawei AU - Huang Y AD - Department of Urology, The Second Affiliated Hospital of Nanchang University, Nanchang, PR China. FAU - Chen, Tongchang AU - Chen T AD - Department of Urology, The Second Affiliated Hospital of Nanchang University, Nanchang, PR China. FAU - Hu, Honglin AU - Hu H AD - Department of Urology, The Second Affiliated Hospital of Nanchang University, Nanchang, PR China. Electronic address: honglinhu@126.com. LA - eng PT - Journal Article DEP - 20190924 PL - Netherlands TA - Eur J Pharmacol JT - European journal of pharmacology JID - 1254354 RN - EC 2.7.11.1 (TOR Serine-Threonine Kinases) RN - EC 2.7.11.31 (AMP-Activated Protein Kinases) RN - S88TT14065 (Oxygen) RN - X4OV71U42S (Pioglitazone) SB - IM MH - AMP-Activated Protein Kinases/*metabolism MH - Animals MH - Autophagy/*drug effects MH - Cell Hypoxia/drug effects MH - Cell Line MH - Cytoprotection/drug effects MH - Kidney Tubules/*cytology/drug effects/metabolism MH - Oxygen/*metabolism MH - Pioglitazone/*pharmacology MH - Rats MH - Signal Transduction/*drug effects MH - TOR Serine-Threonine Kinases/*metabolism OTO - NOTNLM OT - AMP OT - Autophagy OT - Hypoxia/reoxygenation OT - Pioglitazone OT - Tubular cells EDAT- 2019/09/29 06:00 MHDA- 2020/03/24 06:00 CRDT- 2019/09/28 06:00 PHST- 2019/04/07 00:00 [received] PHST- 2019/09/23 00:00 [revised] PHST- 2019/09/24 00:00 [accepted] PHST- 2019/09/29 06:00 [pubmed] PHST- 2020/03/24 06:00 [medline] PHST- 2019/09/28 06:00 [entrez] AID - S0014-2999(19)30647-8 [pii] AID - 10.1016/j.ejphar.2019.172695 [doi] PST - ppublish SO - Eur J Pharmacol. 2019 Nov 15;863:172695. doi: 10.1016/j.ejphar.2019.172695. Epub 2019 Sep 24.