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Ruggiero A, Aloni E, Korkotian E, Zaltsman Y, Oni-Biton E, Kuperman Y, Tsoory M, Shachnai L, Levin-Zaidman S, Brenner O, Segal M, Gross A. Loss of forebrain MTCH2 decreases mitochondria motility and calcium handling and impairs hippocampal-dependent cognitive functions. Sci Rep 2017; 7:44401. [PMID: 28276496 PMCID: PMC5343590 DOI: 10.1038/srep44401] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2016] [Accepted: 02/07/2017] [Indexed: 12/23/2022] Open
Abstract
Mitochondrial Carrier Homolog 2 (MTCH2) is a novel regulator of mitochondria metabolism, which was recently associated with Alzheimer’s disease. Here we demonstrate that deletion of forebrain MTCH2 increases mitochondria and whole-body energy metabolism, increases locomotor activity, but impairs motor coordination and balance. Importantly, mice deficient in forebrain MTCH2 display a deficit in hippocampus-dependent cognitive functions, including spatial memory, long term potentiation (LTP) and rates of spontaneous excitatory synaptic currents. Moreover, MTCH2-deficient hippocampal neurons display a deficit in mitochondria motility and calcium handling. Thus, MTCH2 is a critical player in neuronal cell biology, controlling mitochondria metabolism, motility and calcium buffering to regulate hippocampal-dependent cognitive functions.
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Affiliation(s)
- Antonella Ruggiero
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Etay Aloni
- Department of Neurobiology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Eduard Korkotian
- Department of Neurobiology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Yehudit Zaltsman
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Efrat Oni-Biton
- Department of Neurobiology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Yael Kuperman
- Department of Veterinary Resources, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Michael Tsoory
- Department of Veterinary Resources, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Liat Shachnai
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Smadar Levin-Zaidman
- Department of Chemical research Support, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Ori Brenner
- Department of Veterinary Resources, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Menahem Segal
- Department of Neurobiology, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Atan Gross
- Department of Biological Regulation, Weizmann Institute of Science, Rehovot 7610001, Israel
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Buzaglo-Azriel L, Kuperman Y, Tsoory M, Zaltsman Y, Shachnai L, Zaidman SL, Bassat E, Michailovici I, Sarver A, Tzahor E, Haran M, Vernochet C, Gross A. Loss of Muscle MTCH2 Increases Whole-Body Energy Utilization and Protects from Diet-Induced Obesity. Cell Rep 2017; 18:1335-1336. [PMID: 28147285 DOI: 10.1016/j.celrep.2017.01.046] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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Zaltsman Y, Shachnai L, Yivgi-Ohana N, Schwarz M, Maryanovich M, Houtkooper RH, Vaz FM, De Leonardis F, Fiermonte G, Palmieri F, Gillissen B, Daniel PT, Jimenez E, Walsh S, Koehler CM, Roy SS, Walter L, Hajnóczky G, Gross A. MTCH2/MIMP is a major facilitator of tBID recruitment to mitochondria. Nat Cell Biol 2010; 12:553-562. [PMID: 20436477 DOI: 10.1038/ncb2057] [Citation(s) in RCA: 142] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2010] [Accepted: 04/16/2010] [Indexed: 01/06/2023]
Abstract
The BH3-only BID protein (BH3-interacting domain death agonist) has a critical function in the death-receptor pathway in the liver by triggering mitochondrial outer membrane permeabilization (MOMP). Here we show that MTCH2/MIMP (mitochondrial carrier homologue 2/Met-induced mitochondrial protein), a novel truncated BID (tBID)-interacting protein, is a surface-exposed outer mitochondrial membrane protein that facilitates the recruitment of tBID to mitochondria. Knockout of MTCH2/MIMP in embryonic stem cells and in mouse embryonic fibroblasts hinders the recruitment of tBID to mitochondria, the activation of Bax/Bak, MOMP, and apoptosis. Moreover, conditional knockout of MTCH2/MIMP in the liver decreases the sensitivity of mice to Fas-induced hepatocellular apoptosis and prevents the recruitment of tBID to liver mitochondria both in vivo and in vitro. In contrast, MTCH2/MIMP deletion had no effect on apoptosis induced by other pro-apoptotic Bcl-2 family members and no detectable effect on the outer membrane lipid composition. These loss-of-function models indicate that MTCH2/MIMP has a critical function in liver apoptosis by regulating the recruitment of tBID to mitochondria.
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Affiliation(s)
- Yehudit Zaltsman
- Department of Biological Regulation, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Liat Shachnai
- Department of Biological Regulation, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Natalie Yivgi-Ohana
- Department of Biological Regulation, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Michal Schwarz
- Department of Biological Regulation, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Maria Maryanovich
- Department of Biological Regulation, The Weizmann Institute of Science, Rehovot 76100, Israel
| | - Riekelt H Houtkooper
- Laboratory for Integrative and Systems Physiology, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland
| | - Frédéric Maxime Vaz
- Department of Clinical Chemistry and Pediatrics, University of Amsterdam, 1100 DE Amsterdam, The Netherlands
| | | | - Giuseppe Fiermonte
- Department of Pharmaco-Biology, University of Bari, Via E. Orabona 4, 70125 Bari, Italy
| | - Ferdinando Palmieri
- Department of Pharmaco-Biology, University of Bari, Via E. Orabona 4, 70125 Bari, Italy
| | - Bernhard Gillissen
- Department of Hematology, Oncology, and Tumor Immunology, University Medical Center Charité, Humboldt University, 13125 Berlin, Germany
| | - Peter T Daniel
- Department of Hematology, Oncology, and Tumor Immunology, University Medical Center Charité, Humboldt University, 13125 Berlin, Germany
| | - Erin Jimenez
- Department of Chemistry and Biochemistry, University of California at Los Angeles, Los Angeles, California 90095, USA
| | - Susan Walsh
- Department of Chemistry and Biochemistry, University of California at Los Angeles, Los Angeles, California 90095, USA
| | - Carla M Koehler
- Department of Chemistry and Biochemistry, University of California at Los Angeles, Los Angeles, California 90095, USA
| | - Soumya Sinha Roy
- Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA
| | - Ludivine Walter
- Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA
| | - György Hajnóczky
- Department of Pathology, Anatomy and Cell Biology, Thomas Jefferson University, Philadelphia, Pennsylvania 19107, USA
| | - Atan Gross
- Department of Biological Regulation, The Weizmann Institute of Science, Rehovot 76100, Israel
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Shachnai L, Shimamoto K, Kanner BI. Sulfhydryl modification of cysteine mutants of a neuronal glutamate transporter reveals an inverse relationship between sodium dependent conformational changes and the glutamate-gated anion conductance. Neuropharmacology 2005; 49:862-71. [PMID: 16137722 DOI: 10.1016/j.neuropharm.2005.07.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2005] [Revised: 07/06/2005] [Accepted: 07/07/2005] [Indexed: 01/10/2023]
Abstract
In the central nervous system, glutamate transporters remove the neurotransmitter from the synaptic cleft. The electrogenic transport of glutamate is coupled to the electrochemical sodium, proton and potassium gradients. Moreover, these transporters mediate a sodium- and glutamate-dependent uncoupled chloride conductance. In contrast to the wild type, the uptake of radiolabeled substrate of the G283C mutant is inhibited by [2-(trimethylammonium)ethyl]methanethiosulfonate, a membrane impermeant sulfhydryl reagent. In the wild type and the unmodified mutant, substrate-induced currents are inwardly rectifying and reflect the sum of the coupled electrogenic flux and the anion conductance. However, the sulfhydryl-modified G283C mutant exhibits currents that are non-rectifying and reverse at the equilibrium potential for chloride. These properties are similar to those of the I421C mutant after sulfhydryl modification. Importantly, in contrast to I421C, the modification of G283C does not cause an increase of the magnitude of the anion conductance and a decrease of the apparent substrate affinity. Moreover, in the G283C/I421C double mutant the phenotype of I421C is dominant. Sulfhydryl modification of I421C, but not of G283C, abolishes the sodium dependent transient currents. The results indicate the existence of multiple transitions between the coupled transport cycle and anion conducting states.
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Affiliation(s)
- Liat Shachnai
- Department of Biochemistry, Hebrew University Hadassah Medical School, P.O.B. 12272, Jerusalem 91120, Israel
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