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Chen K, Xu Z, Liu Y, Wang Z, Li Y, Xu X, Chen C, Xia T, Liao Q, Yao Y, Zeng C, He D, Yang Y, Tan T, Yi J, Zhou J, Zhu H, Ma J, Zeng C. Irisin protects mitochondria function during pulmonary ischemia/reperfusion injury. Sci Transl Med 2018; 9:9/418/eaao6298. [PMID: 29187642 DOI: 10.1126/scitranslmed.aao6298] [Citation(s) in RCA: 128] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2016] [Revised: 08/10/2017] [Accepted: 10/20/2017] [Indexed: 12/13/2022]
Abstract
Limb remote ischemic preconditioning (RIPC) is an effective means of protection against ischemia/reperfusion (IR)-induced injury to multiple organs. Many studies are focused on identifying endocrine mechanisms that underlie the cross-talk between muscle and RIPC-mediated organ protection. We report that RIPC releases irisin, a myokine derived from the extracellular portion of fibronectin domain-containing 5 protein (FNDC5) in skeletal muscle, to protect against injury to the lung. Human patients with neonatal respiratory distress syndrome show reduced concentrations of irisin in the serum and increased irisin concentrations in the bronchoalveolar lavage fluid, suggesting transfer of irisin from circulation to the lung under physiologic stress. In mice, application of brief periods of ischemia preconditioning stimulates release of irisin into circulation and transfer of irisin to the lung subjected to IR injury. Irisin, via lipid raft-mediated endocytosis, enters alveolar cells and targets mitochondria. Interaction between irisin and mitochondrial uncoupling protein 2 (UCP2) allows for prevention of IR-induced oxidative stress and preservation of mitochondrial function. Animal model studies show that intravenous administration of exogenous irisin protects against IR-induced injury to the lung via improvement of mitochondrial function, whereas in UCP2-deficient mice or in the presence of a UCP2 inhibitor, the protective effect of irisin is compromised. These results demonstrate that irisin is a myokine that facilitates RIPC-mediated lung protection. Targeting the action of irisin in mitochondria presents a potential therapeutic intervention for pulmonary IR injury.
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Affiliation(s)
- Ken Chen
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China.,Chongqing Institute of Cardiology, Chongqing 400042, P.R. China.,Department of Cardiology, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P.R. China
| | - Zaicheng Xu
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China.,Chongqing Institute of Cardiology, Chongqing 400042, P.R. China
| | - Yukai Liu
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China.,Chongqing Institute of Cardiology, Chongqing 400042, P.R. China
| | - Zhen Wang
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China.,Chongqing Institute of Cardiology, Chongqing 400042, P.R. China
| | - Yu Li
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China.,Chongqing Institute of Cardiology, Chongqing 400042, P.R. China
| | - Xuefei Xu
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China.,Chongqing Institute of Cardiology, Chongqing 400042, P.R. China
| | - Caiyu Chen
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China.,Chongqing Institute of Cardiology, Chongqing 400042, P.R. China
| | - Tianyang Xia
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China.,Chongqing Institute of Cardiology, Chongqing 400042, P.R. China
| | - Qiao Liao
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China.,Chongqing Institute of Cardiology, Chongqing 400042, P.R. China
| | - Yonggang Yao
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China.,Chongqing Institute of Cardiology, Chongqing 400042, P.R. China
| | - Cindy Zeng
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China.,Chongqing Institute of Cardiology, Chongqing 400042, P.R. China
| | - Duofen He
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China.,Chongqing Institute of Cardiology, Chongqing 400042, P.R. China
| | - Yongjian Yang
- Department of Cardiology, Chengdu Military General Hospital, Chengdu, Sichuan 610083, P.R. China
| | - Tao Tan
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210, USA
| | - Jianxun Yi
- Department of Physiology, Kansas City University, Kansas City, MO 64106, USA
| | - Jingsong Zhou
- Department of Physiology, Kansas City University, Kansas City, MO 64106, USA
| | - Hua Zhu
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210, USA
| | - Jianjie Ma
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH 43210, USA.
| | - Chunyu Zeng
- Department of Cardiology, Daping Hospital, The Third Military Medical University, Chongqing 400042, P.R. China. .,Chongqing Institute of Cardiology, Chongqing 400042, P.R. China
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Deschuyteneer A, Boeckstaens M, De Mees C, Van Vooren P, Wintjens R, Marini AM. SNPs altering ammonium transport activity of human Rhesus factors characterized by a yeast-based functional assay. PLoS One 2013; 8:e71092. [PMID: 23967154 PMCID: PMC3742762 DOI: 10.1371/journal.pone.0071092] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Accepted: 06/24/2013] [Indexed: 01/23/2023] Open
Abstract
Proteins of the conserved Mep-Amt-Rh family, including mammalian Rhesus factors, mediate transmembrane ammonium transport. Ammonium is an important nitrogen source for the biosynthesis of amino acids but is also a metabolic waste product. Its disposal in urine plays a critical role in the regulation of the acid/base homeostasis, especially with an acid diet, a trait of Western countries. Ammonium accumulation above a certain concentration is however pathologic, the cytotoxicity causing fatal cerebral paralysis in acute cases. Alteration in ammonium transport via human Rh proteins could have clinical outcomes. We used a yeast-based expression assay to characterize human Rh variants resulting from non synonymous single nucleotide polymorphisms (nsSNPs) with known or unknown clinical phenotypes and assessed their ammonium transport efficiency, protein level, localization and potential trans-dominant impact. The HsRhAG variants (I61R, F65S) associated to overhydrated hereditary stomatocytosis (OHSt), a disease affecting erythrocytes, proved affected in intrinsic bidirectional ammonium transport. Moreover, this study reveals that the R202C variant of HsRhCG, the orthologue of mouse MmRhcg required for optimal urinary ammonium excretion and blood pH control, shows an impaired inherent ammonium transport activity. Urinary ammonium excretion was RHcg gene-dose dependent in mouse, highlighting MmRhcg as a limiting factor. HsRhCG(R202C) may confer susceptibility to disorders leading to metabolic acidosis for instance. Finally, the analogous R211C mutation in the yeast ScMep2 homologue also impaired intrinsic activity consistent with a conserved functional role of the preserved arginine residue. The yeast expression assay used here constitutes an inexpensive, fast and easy tool to screen nsSNPs reported by high throughput sequencing or individual cases for functional alterations in Rh factors revealing potential causal variants.
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Affiliation(s)
- Aude Deschuyteneer
- Biologie du Transport Membranaire, Université Libre de Bruxelles, Gosselies, Belgium
| | - Mélanie Boeckstaens
- Biologie du Transport Membranaire, Université Libre de Bruxelles, Gosselies, Belgium
| | - Christelle De Mees
- Biologie du Transport Membranaire, Université Libre de Bruxelles, Gosselies, Belgium
| | - Pascale Van Vooren
- Biologie du Transport Membranaire, Université Libre de Bruxelles, Gosselies, Belgium
| | - René Wintjens
- Laboratoire des Biopolymères et des nanomatériaux supramoléculaires, Université Libre de Bruxelles, Brussels, Belgium
| | - Anna Maria Marini
- Biologie du Transport Membranaire, Université Libre de Bruxelles, Gosselies, Belgium
- * E-mail:
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Fricke B, Parsons SF, Knöpfle G, von Düring M, Stewart GW. Stomatin is mis-trafficked in the erythrocytes of overhydrated hereditary stomatocytosis, and is absent from normal primitive yolk sac-derived erythrocytes. Br J Haematol 2005; 131:265-77. [PMID: 16197460 DOI: 10.1111/j.1365-2141.2005.05742.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The 32 kD lipid-raft-associated membrane protein 'stomatin' is deficient from the erythrocyte membrane in the Na+-K+ leaky haemolytic anaemia, overhydrated hereditary stomatocytosis (OHSt). To date, no mutation in the gene coding for this protein has so far been found in OHSt. In this study, we have analysed the distribution of stomatin in both cultured erythroid cells from OHSt patients and in normal embryological and fetal erythroid development. In erythroid cell cultures from OHSt patients, stomatin-immunoreactivity (stomatin-IR) was present in progenitor cells but remained restricted to the area of the multivesicular complexes and the nucleus in the developing cells and was not seen in the plasma membrane. This could be consistent with the idea that stomatin is an innocent passenger in a more fundamental trafficking abnormality. In normal embryonic development, we found that, in extraembryonic (yolk sac) erythropoiesis, neither the nucleated red cells nor their enucleated mature derivatives displayed any stomatin-IR. In contrast, all haemangiopoietic progenitor cells of intraembryonic haematopoiesis, starting with the mesodermal precursors in the aorta-gonad-mesonephros region, exhibited strong stomatin-IR. The significance of this observation on these poorly understood cells is currently unclear.
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Affiliation(s)
- Britta Fricke
- Department of Neuroanatomy, Ruhr University, Bochum, Germany
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