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Saralkar P, Mdzinarishvili A, Arsiwala TA, Lee YK, Sullivan PG, Pinti MV, Hollander JM, Kelley EE, Ren X, Hu H, Simpkins J, Brown C, Hazlehurst LE, Huber JD, Geldenhuys WJ. The Mitochondrial mitoNEET Ligand NL-1 Is Protective in a Murine Model of Transient Cerebral Ischemic Stroke. Pharm Res 2021; 38:803-817. [PMID: 33982226 PMCID: PMC8298128 DOI: 10.1007/s11095-021-03046-4] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2021] [Accepted: 04/19/2021] [Indexed: 10/21/2022]
Abstract
PURPOSE Therapeutic strategies to treat ischemic stroke are limited due to the heterogeneity of cerebral ischemic injury and the mechanisms that contribute to the cell death. Since oxidative stress is one of the primary mechanisms that cause brain injury post-stroke, we hypothesized that therapeutic targets that modulate mitochondrial function could protect against reperfusion-injury after cerebral ischemia, with the focus here on a mitochondrial protein, mitoNEET, that modulates cellular bioenergetics. METHOD In this study, we evaluated the pharmacology of the mitoNEET ligand NL-1 in an in vivo therapeutic role for NL-1 in a C57Bl/6 murine model of ischemic stroke. RESULTS NL-1 decreased hydrogen peroxide production with an IC50 of 5.95 μM in neuronal cells (N2A). The in vivo activity of NL-1 was evaluated in a murine 1 h transient middle cerebral artery occlusion (t-MCAO) model of ischemic stroke. We found that mice treated with NL-1 (10 mg/kg, i.p.) at time of reperfusion and allowed to recover for 24 h showed a 43% reduction in infarct volume and 68% reduction in edema compared to sham-injured mice. Additionally, we found that when NL-1 was administered 15 min post-t-MCAO, the ischemia volume was reduced by 41%, and stroke-associated edema by 63%. CONCLUSION As support of our hypothesis, as expected, NL-1 failed to reduce stroke infarct in a permanent photothrombotic occlusion model of stroke. This report demonstrates the potential therapeutic benefits of using mitoNEET ligands like NL-1 as novel mitoceuticals for treating reperfusion-injury with cerebral stroke.
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Affiliation(s)
- Pushkar Saralkar
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, 1 Medical Center Drive, Morgantown, West Virginia, 26506, USA
| | - Alexander Mdzinarishvili
- Department of Neurology, College of Medicine, University of Oklahoma HSC, Oklahoma City, Oklahoma, USA
| | - Tasneem A Arsiwala
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, 1 Medical Center Drive, Morgantown, West Virginia, 26506, USA
| | - Yoon-Kwang Lee
- Department of Integrative Medical Sciences, College of Medicine, Northeast Ohio Medical University, Rootstown, Ohio, USA
| | - Patrick G Sullivan
- Department of Neuroscience, Spinal and Brain Injury Research Center, School of Medicine, University of Kentucky, Lexington, Kentucky, USA
| | - Mark V Pinti
- Department of Neuroscience, School of Medicine, West Virginia University, Morgantown, West Virginia, USA
- Mitochondria, Metabolism & Bioenergetics Working Group, West Virginia University, Morgantown, West Virginia, USA
| | - John M Hollander
- Mitochondria, Metabolism & Bioenergetics Working Group, West Virginia University, Morgantown, West Virginia, USA
- Division of Exercise Physiology, School of Medicine, West Virginia University, Morgantown, West Virginia, USA
| | - Eric E Kelley
- Department of Physiology and Pharmacology, West Virginia University, Morgantown, West Virginia, USA
| | - Xuefang Ren
- Department of Neuroscience, School of Medicine, West Virginia University, Morgantown, West Virginia, USA
| | - Heng Hu
- Department of Neuroscience, School of Medicine, West Virginia University, Morgantown, West Virginia, USA
| | - James Simpkins
- Department of Neuroscience, School of Medicine, West Virginia University, Morgantown, West Virginia, USA
| | - Candice Brown
- Department of Neuroscience, School of Medicine, West Virginia University, Morgantown, West Virginia, USA
| | - Lori E Hazlehurst
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, 1 Medical Center Drive, Morgantown, West Virginia, 26506, USA
| | - Jason D Huber
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, 1 Medical Center Drive, Morgantown, West Virginia, 26506, USA
- Department of Neuroscience, School of Medicine, West Virginia University, Morgantown, West Virginia, USA
| | - Werner J Geldenhuys
- Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, 1 Medical Center Drive, Morgantown, West Virginia, 26506, USA.
- Department of Neuroscience, School of Medicine, West Virginia University, Morgantown, West Virginia, USA.
- Mitochondria, Metabolism & Bioenergetics Working Group, West Virginia University, Morgantown, West Virginia, USA.
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Taguchi AT, Miyajima-Nakano Y, Fukazawa R, Lin MT, Baldansuren A, Gennis RB, Hasegawa K, Kumasaka T, Dikanov SA, Iwasaki T. Unpaired Electron Spin Density Distribution across Reduced [2Fe-2S] Cluster Ligands by 13Cβ-Cysteine Labeling. Inorg Chem 2017; 57:741-746. [DOI: 10.1021/acs.inorgchem.7b02676] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alexander T. Taguchi
- Department of Biochemistry and Molecular Biology, Nippon Medical School, Sendagi, Tokyo 113-8602, Japan
| | - Yoshiharu Miyajima-Nakano
- Department of Biochemistry and Molecular Biology, Nippon Medical School, Sendagi, Tokyo 113-8602, Japan
| | - Risako Fukazawa
- Department of Biochemistry and Molecular Biology, Nippon Medical School, Sendagi, Tokyo 113-8602, Japan
| | | | - Amgalanbaatar Baldansuren
- Department of Veterinary
Clinical Medicine, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Robert B. Gennis
- Department of Biochemistry, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Kazuya Hasegawa
- Japan Synchrotron Radiation Research Institute (SPring-8/JASRI), Sayo, Hyogo 679-5198, Japan
| | - Takashi Kumasaka
- Japan Synchrotron Radiation Research Institute (SPring-8/JASRI), Sayo, Hyogo 679-5198, Japan
| | - Sergei A. Dikanov
- Department of Veterinary
Clinical Medicine, University of Illinois at Urbana−Champaign, Urbana, Illinois 61801, United States
| | - Toshio Iwasaki
- Department of Biochemistry and Molecular Biology, Nippon Medical School, Sendagi, Tokyo 113-8602, Japan
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Landry AP, Cheng Z, Ding H. Reduction of mitochondrial protein mitoNEET [2Fe-2S] clusters by human glutathione reductase. Free Radic Biol Med 2015; 81:119-27. [PMID: 25645953 PMCID: PMC4365936 DOI: 10.1016/j.freeradbiomed.2015.01.017] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/07/2014] [Revised: 01/09/2015] [Accepted: 01/21/2015] [Indexed: 11/27/2022]
Abstract
The human mitochondrial outer membrane protein mitoNEET is a newly discovered target of the type 2 diabetes drug pioglitazone. Structurally, mitoNEET is a homodimer with each monomer containing an N-terminal transmembrane α helix tethered to the mitochondrial outer membrane and a C-terminal cytosolic domain hosting a redox-active [2Fe-2S] cluster. Genetic studies have shown that mitoNEET has a central role in regulating energy metabolism in mitochondria. However, the specific function of mitoNEET remains largely elusive. Here we find that the mitoNEET [2Fe-2S] clusters can be efficiently reduced by Escherichia coli thioredoxin reductase and glutathione reductase in an NADPH-dependent reaction. Purified human glutathione reductase has the same activity as E. coli thioredoxin reductase and glutathione reductase to reduce the mitoNEET [2Fe-2S] clusters. However, rat thioredoxin reductase, a human thioredoxin reductase homolog that contains selenocysteine in the catalytic center, has very little or no activity to reduce the mitoNEET [2Fe-2S] clusters. N-ethylmaleimide, a potent thiol modifier, completely inhibits human glutathione reductase from reducing the mitoNEET [2Fe-2S] clusters, indicating that the redox-active disulfide in the catalytic center of human glutathione reductase may be directly involved in reducing the mitoNEET [2Fe-2S] clusters. Additional studies reveal that the reduced mitoNEET [2Fe-2S] clusters in mouse heart cell extracts can be reversibly oxidized by hydrogen peroxide without disruption of the clusters, suggesting that the mitoNEET [2Fe-2S] clusters may undergo redox transition to regulate energy metabolism in mitochondria in response to oxidative signals.
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Affiliation(s)
- Aaron P Landry
- Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Zishuo Cheng
- Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Huangen Ding
- Department of Biological Sciences, Louisiana State University, Baton Rouge, LA 70803, USA.
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Geldenhuys WJ, Leeper TC, Carroll RT. mitoNEET as a novel drug target for mitochondrial dysfunction. Drug Discov Today 2014; 19:1601-6. [PMID: 24814435 DOI: 10.1016/j.drudis.2014.05.001] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2013] [Revised: 03/31/2014] [Accepted: 05/01/2014] [Indexed: 01/17/2023]
Abstract
Mitochondrial dysfunction plays an important part in the pathology of several diseases, including Alzheimer's disease and Parkinson's disease. Targeting mitochondrial proteins shows promise in treating and attenuating the neurodegeneration seen in these diseases, especially considering their complex and pleiotropic origins. Recently, the mitochondrial protein mitoNEET [also referred to as CDGSH iron sulfur domain 1 (CISD1)] has emerged as the mitochondrial target of thiazolidinedione drugs such as the antidiabetic pioglitazone. In this review, we evaluate the current understanding regarding how mitoNEET regulates cellular bioenergetics as well as the structural requirements for drug compound association with mitoNEET. With a clear understanding of mitoNEET function, it might be possible to develop therapeutic agents useful in several different diseases including neurodegeneration, breast cancer, diabetes and inflammation.
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Affiliation(s)
- Werner J Geldenhuys
- Department of Pharmaceutical Sciences, College of Pharmacy, Northeast Ohio Medical University, Rootstown, OH 44272, USA.
| | - Thomas C Leeper
- Department of Chemistry, University of Akron, Akron, OH, USA
| | - Richard T Carroll
- Department of Pharmaceutical Sciences, College of Pharmacy, Northeast Ohio Medical University, Rootstown, OH 44272, USA
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Nisawa A, Yoneda Y, Ueno G, Murakami H, Okajima Y, Yamamoto K, Senba Y, Uesugi K, Tanaka Y, Yamamoto M, Goto S, Ishikawa T. Sagittal focusing of synchrotron radiation X-rays using a winged crystal. JOURNAL OF SYNCHROTRON RADIATION 2013; 20:219-25. [PMID: 23412477 PMCID: PMC3573870 DOI: 10.1107/s0909049512049813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Accepted: 12/05/2012] [Indexed: 06/01/2023]
Abstract
A Si(111) winged crystal has been designed to minimize anticlastic bending and improve sagittal focusing efficiency. The crystal was thin with wide stiffening wings. The length-to-width ratio of the crystal was optimized by finite element analysis, and the optimal value was larger than the `golden value'. The analysis showed that the slope error owing to anticlastic bending is less than the Darwin width. The X-rays were focused two-dimensionally using the crystal and a tangentially bent mirror. The observed profiles of the focal spot agreed well with the results of a ray-tracing calculation in the energy range from 8 to 17.5 keV. X-ray diffraction measurements with a high signal-to-noise ratio using this focusing system were demonstrated for a small protein crystal.
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Affiliation(s)
- A Nisawa
- RIKEN Harima Institute SPring-8 Center, Kouto 1-1-1, Sayo, Hyogo, Japan.
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Structure and molecular evolution of CDGSH iron-sulfur domains. PLoS One 2011; 6:e24790. [PMID: 21949752 PMCID: PMC3174974 DOI: 10.1371/journal.pone.0024790] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Accepted: 08/18/2011] [Indexed: 12/26/2022] Open
Abstract
The recently discovered CDGSH iron-sulfur domains (CISDs) are classified into seven major types with a wide distribution throughout the three domains of life. The type 1 protein mitoNEET has been shown to fold into a dimer with the signature CDGSH motif binding to a [2Fe-2S] cluster. However, the structures of all other types of CISDs were unknown. Here we report the crystal structures of type 3, 4, and 6 CISDs determined at 1.5 Å, 1.8 Å and 1.15 Å resolution, respectively. The type 3 and 4 CISD each contain one CDGSH motif and adopt a dimeric structure. Although similar to each other, the two structures have permutated topologies, and both are distinct from the type 1 structure. The type 6 CISD contains tandem CDGSH motifs and adopts a monomeric structure with an internal pseudo dyad symmetry. All currently known CISD structures share dual iron-sulfur binding modules and a β-sandwich for either intermolecular or intramolecular dimerization. The iron-sulfur binding module, the β-strand N-terminal to the module and a proline motif are conserved among different type structures, but the dimerization module and the interface and orientation between the two iron-sulfur binding modules are divergent. Sequence analysis further shows resemblance between CISD types 4 and 7 and between 1 and 2. Our findings suggest that all CISDs share common ancestry and diverged into three primary folds with a characteristic phylogenetic distribution: a eukaryote-specific fold adopted by types 1 and 2 proteins, a prokaryote-specific fold adopted by types 3, 4 and 7 proteins, and a tandem-motif fold adopted by types 5 and 6 proteins. Our comprehensive structural, sequential and phylogenetic analysis provides significant insight into the assembly principles and evolutionary relationship of CISDs.
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Iwasaki T, Samoilova RI, Kounosu A, Ohmori D, Dikanov SA. Continuous-wave and pulsed EPR characterization of the [2Fe-2S](Cys)3(His)1 cluster in rat MitoNEET. J Am Chem Soc 2009; 131:13659-67. [PMID: 19736979 PMCID: PMC2756718 DOI: 10.1021/ja903228w] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
CW EPR spectra of reduced [2Fe-2S](Cys)(3)(His)(1) clusters of mammalian mitoNEET soluble domain appear to produce features resulting from the interaction of the electron spins of the two adjacent clusters, which can be explained by employing the local spin model. This model favors the reduction of the outermost iron with His87 and Cys83 ligands, which is supported by orientation-selected hyperfine sublevel correlation (HYSCORE) characterization of the uniformly (15)N-labeled mitoNEET showing one strongly coupled nitrogen from the His87 N(delta) ligand with hyperfine coupling (15)a = 8 MHz. The (14)N and (15)N HYSCORE spectra also exhibit at least two different cross-peaks located near diagonal in the (++) quadrant, with frequencies approximately 2.8 and 2.4 MHz (N2), and the other approximately 4.0 and 3.5 MHz (N1), but did not show any of the larger splitting approximately 1.1-1.4 MHz previously seen with Rieske proteins. Further analysis with partially (15)N(3)-His-labeled protein indicates that His87 N(epsilon) cross-peaks produce resolved features (N2) in the (14)N spectrum but contribute much less than weakly coupled peptide nitrogen species to the (++) quadrant in the (15)N spectrum. It is suggested that these quantitative data may be used in future functional and theoretical studies on the mammalian mitoNEET [2Fe-2S] cluster system.
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Affiliation(s)
- Toshio Iwasaki
- Department of Biochemistry and Molecular Biology, Nippon Medical School, Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
| | - Rimma I. Samoilova
- Institute of Chemical Kinetics and Combustion, Russian Academy of Sciences, Novosibirsk 630090, Russia
| | - Asako Kounosu
- Department of Biochemistry and Molecular Biology, Nippon Medical School, Sendagi, Bunkyo-ku, Tokyo 113-8602, Japan
| | - Daijiro Ohmori
- Department of Chemistry, Juntendo University, Inba, Chiba 270-1695, Japan
| | - Sergei A. Dikanov
- Department of Veterinary Clinical Medicine, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801
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