title: Octreotide Attenuates Acute Kidney Injury after Hepatic Ischemia and Reperfusion by Enhancing Autophagy.
abstract: Octreotide exerts a protective effect in hepatic ischemia-reperfusion (HIR) injury. However, whether octreotide preconditioning could also reduce acute kidney injury (AKI) after HIR is unknown. This study was designed to investigate the role of octreotide in AKI after HIR. Male Sprague-Dawley rats were pretreated with octreotide or octreotide combined with 3-methyladenine (autophagy inhibitor, 3MA). Plasma creatinine, inflammation markers (e.g., TNF-α and IL-6 etc.), apoptosis, autophagy and phosphorylation of protein kinase B/mammalian target of rapamycin/p70 ribosomal S6 kinase (Akt/mTOR/p70S6K) in the kidney were measured after 60 minutes of liver ischemia and 24 hours of reperfusion for each rat. Octreotide pretreatment significantly preserved renal function and reduced the severity of renal injury. Moreover, octreotide alleviated inflammation and apoptosis in the kidney after HIR. Additionally, octreotide induced autophagy and autophagy inhibition with 3MA markedly reversed the renoprotective, anti-inflammatory and anti-apoptotic effects of octreotide after HIR. Finally, octreotide abrogated the activation of phosphorylation of Akt, mTOR and p70S6K in the kidney after HIR. Our results indicate that octreotide reduced renal injury after HIR due to its induction of autophagy. The enhancement of autophagy may be potentially linked to the octreotide mediated Akt/mTOR/p70S6K pathway deactivation and reduction of kidney inflammation and apoptosis after HIR.
authors.affiliation: Department of Anesthesiology, Hunan Cancer Hospital, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, Hunan, China.
authors.forename: Huiping
authors.initials: H
authors.lastname: Sun
authors.affiliation: Department of Anesthesiology, Hunan Cancer Hospital, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, Hunan, China.
authors.forename: Shuangfa
authors.initials: S
authors.lastname: Zou
authors.affiliation: Department of Anesthesiology, Perioperative Medicine and Pain Management, University of Miami-Miller School of Medicine, Miami, FL 33136, USA.
authors.forename: Keith A
authors.initials: KA
authors.lastname: Candiotti
authors.affiliation: Department of Anesthesiology, Hunan Cancer Hospital, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, Hunan, China.
authors.forename: Yanhua
authors.initials: Y
authors.lastname: Peng
authors.affiliation: Department of Anesthesiology, Hunan Cancer Hospital, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, Hunan, China.
authors.forename: Qinya
authors.initials: Q
authors.lastname: Zhang
authors.affiliation: Department of Anesthesiology, Hunan Cancer Hospital, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, Hunan, China.
authors.forename: Weiqiang
authors.initials: W
authors.lastname: Xiao
authors.affiliation: Department of Anesthesiology, Hunan Cancer Hospital, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, Hunan, China.
authors.forename: Yiyun
authors.initials: Y
authors.lastname: Wen
authors.affiliation: Department of Anesthesiology, Hunan Cancer Hospital, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, Hunan, China.
authors.forename: Jiao
authors.initials: J
authors.lastname: Wu
authors.affiliation: Department of Anesthesiology, Hunan Cancer Hospital, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha 410013, Hunan, China.
authors.forename: Jinfeng
authors.initials: J
authors.lastname: Yang
mesh_terms: D058186:Acute Kidney Injury / Q000175:diagnosis / Q000188:drug therapy / Q000209:etiology* / Q000378:metabolism; D000818:Animals; D017209:Apoptosis / Q000187:drug effects; D001343:Autophagy / Q000187:drug effects*; D015415:Biomarkers; D001706:Biopsy; D016207:Cytokines / Q000378:metabolism; D004195:Disease Models, Animal; D018836:Inflammation Mediators / Q000378:metabolism; D008107:Liver Diseases / Q000150:complications* / Q000175:diagnosis / Q000209:etiology; D008111:Liver Function Tests; D008297:Male; D015282:Octreotide / Q000494:pharmacology*; D020011:Protective Agents / Q000494:pharmacology*; D051057:Proto-Oncogene Proteins c-akt / Q000378:metabolism; D051381:Rats; D015427:Reperfusion Injury / Q000150:complications* / Q000175:diagnosis; D038762:Ribosomal Protein S6 Kinases, 70-kDa / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects; D058570:TOR Serine-Threonine Kinases / Q000378:metabolism
chemical_list: D015415:Biomarkers; D016207:Cytokines; D018836:Inflammation Mediators; D020011:Protective Agents; D051057:Proto-Oncogene Proteins c-akt; D038762:Ribosomal Protein S6 Kinases, 70-kDa; D058570:TOR Serine-Threonine Kinases; D015282:Octreotide