PMID- 32686659 OWN - NLM STAT- MEDLINE DCOM- 20210505 LR - 20210505 IS - 1643-3750 (Electronic) IS - 1234-1010 (Print) IS - 1234-1010 (Linking) VI - 26 DP - 2020 Jul 20 TI - Protective Effects of Ischemic Postconditioning on Livers in Rats with Limb Ischemia-Reperfusion via Glycogen Synthase Kinase 3 beta (GSK-3beta)/Fyn/Nuclear Receptor-Erythroid-2-Related Factor (Nrf2) Pathway. PG - e923049 LID - 10.12659/MSM.923049 [doi] AB - BACKGROUND Ischemia/reperfusion (I/R) injury not only exists in ischemic tissues and organs, but also can cause damage to distant tissues and organs. As the largest metabolic organ of the human body, the liver is very vulnerable to injury after limb I/R. However, the mechanism of liver injury caused by limb I/R injury has not been fully elucidated. This study investigated the effect and mechanism of ischemic postconditioning (IPO) on the liver after hindlimb I/R in rats. MATERIAL AND METHODS A rat model of hindlimb I/R was established and treated by IPO. Liver function, changes of oxidative stress index and inflammation, Bcl-2 and Bax proteins, and apoptosis were assessed. The structural changes were observed by electron microscopy. GSK-3ss/Fyn/Nrf2 levels were detected by quantitative PCR and Western blot. RESULTS IPO significantly reduced serum AST, ALP, LDH, and ALT levels induced by I/R. Compared with the I/R group, the levels of SOD, GSH-Px, and CAT in the IPO group were significantly increased, while the levels of MDA, MPO, and ROS were significantly decreased. The IPO group had significantly higher Bcl-2 level and significantly lower Bax level compared to the I/R group. Consistently, IPO decreased the apoptosis rate induced by I/R. Furthermore, IPO lowered the levels of TNF-alpha, IL-1ss, IL-10, and INF-gamma and alleviated the ultrastructural changes of hepatocytes. Finally, Nrf2, Fyn, and GSK-3ss mRNA and protein levels in the IPO group were significantly higher than in the I/R group. CONCLUSIONS IPO protects against liver injury caused by I/R injury of the hindlimb, possibly via the GSK-3ss/Fyn/Nrf2 pathway. FAU - Niu, Qibing AU - Niu Q AD - Department of Vascular Surgery, People's Hospital in Gansu Province, Gansu University of Chinese Medicine, Lanzhou, Gansu, China (mainland). FAU - Sun, Wanli AU - Sun W AD - Department of Vascular Surgery, People's Hospital in Gansu Province, Gansu University of Chinese Medicine, Lanzhou, Gansu, China (mainland). FAU - Chen, Quan AU - Chen Q AD - Department of Vascular Surgery, People's Hospital in Gansu Province, Gansu University of Chinese Medicine, Lanzhou, Gansu, China (mainland). FAU - Long, Yang AU - Long Y AD - Department of Vascular Surgery, People's Hospital in Gansu Province, Gansu University of Chinese Medicine, Lanzhou, Gansu, China (mainland). FAU - Cao, Wanjun AU - Cao W AD - Department of Vascular Surgery, People's Hospital in Gansu Province, Gansu University of Chinese Medicine, Lanzhou, Gansu, China (mainland). FAU - Wen, Shiqi AU - Wen S AD - Department of Vascular Surgery, People's Hospital in Gansu Province, Gansu University of Chinese Medicine, Lanzhou, Gansu, China (mainland). FAU - Li, Anqiang AU - Li A AD - Department of Vascular Surgery, People's Hospital in Gansu Province, Gansu University of Chinese Medicine, Lanzhou, Gansu, China (mainland). FAU - Dong, Fang AU - Dong F AD - Department of Vascular Surgery, People's Hospital in Gansu Province, Gansu University of Chinese Medicine, Lanzhou, Gansu, China (mainland). FAU - Shi, Hao AU - Shi H AD - Department of Vascular Surgery, People's Hospital in Gansu Province, Gansu University of Chinese Medicine, Lanzhou, Gansu, China (mainland). LA - eng PT - Journal Article DEP - 20200720 PL - United States TA - Med Sci Monit JT - Medical science monitor : international medical journal of experimental and clinical research JID - 9609063 RN - 0 (NF-E2-Related Factor 2) RN - 0 (Nfe2l2 protein, rat) RN - 0 (Tumor Necrosis Factor-alpha) RN - 0 (bcl-2-Associated X Protein) RN - EC 2.7.10.2 (Proto-Oncogene Proteins c-fyn) RN - EC 2.7.11.1 (Glycogen Synthase Kinase 3 beta) SB - IM MH - Animals MH - Apoptosis MH - Glycogen Synthase Kinase 3 beta/metabolism MH - Hepatocytes/metabolism MH - Ischemia/metabolism MH - Ischemic Postconditioning/*methods MH - Liver/*blood supply/metabolism/pathology MH - Male MH - NF-E2-Related Factor 2/metabolism MH - Oxidative Stress MH - Proto-Oncogene Proteins c-fyn/metabolism MH - Rats MH - Rats, Sprague-Dawley MH - Reperfusion/methods MH - Reperfusion Injury/metabolism/pathology/*therapy MH - Tumor Necrosis Factor-alpha/metabolism MH - bcl-2-Associated X Protein/metabolism PMC - PMC7392060 COIS- Conflict of interest None. EDAT- 2020/07/21 06:00 MHDA- 2021/05/06 06:00 PMCR- 2020/07/20 CRDT- 2020/07/21 06:00 PHST- 2020/07/21 06:00 [entrez] PHST- 2020/07/21 06:00 [pubmed] PHST- 2021/05/06 06:00 [medline] PHST- 2020/07/20 00:00 [pmc-release] AID - 923049 [pii] AID - 10.12659/MSM.923049 [doi] PST - epublish SO - Med Sci Monit. 2020 Jul 20;26:e923049. doi: 10.12659/MSM.923049.