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Kalita SJ, Cheng F, Huang Y. Recent Advances of Applying Boron‐Reagents in Asymmetric Total Syntheses of Natural Products and Bio‐Active Molecules. Adv Synth Catal 2020. [DOI: 10.1002/adsc.202000413] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Affiliation(s)
- Subarna Jyoti Kalita
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life ScienceWuhan University of Technology Wuhan 430070 People's Republic of China
| | - Feng Cheng
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life ScienceWuhan University of Technology Wuhan 430070 People's Republic of China
| | - Yi‐Yong Huang
- Department of Chemistry, School of Chemistry, Chemical Engineering and Life ScienceWuhan University of Technology Wuhan 430070 People's Republic of China
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2
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Abstract
Recent evidence highlights that the cancer cell energy requirements vary greatly from normal cells and that cancer cells exhibit different metabolic phenotypes with variable participation of both glycolysis and oxidative phosphorylation. NADH-ubiquinone oxidoreductase (Complex I) is the largest complex of the mitochondrial electron transport chain and contributes about 40% of the proton motive force required for mitochondrial ATP synthesis. In addition, Complex I plays an essential role in biosynthesis and redox control during proliferation, resistance to cell death, and metastasis of cancer cells. Although knowledge about the structure and assembly of Complex I is increasing, information about the role of Complex I subunits in tumorigenesis is scarce and contradictory. Several small molecule inhibitors of Complex I have been described as selective anticancer agents; however, pharmacologic and genetic interventions on Complex I have also shown pro-tumorigenic actions, involving different cellular signaling. Here, we discuss the role of Complex I in tumorigenesis, focusing on the specific participation of Complex I subunits in proliferation and metastasis of cancer cells.
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Affiliation(s)
- Félix A Urra
- Anatomy and Developmental Biology Program, Institute of Biomedical Sciences, University of Chile, Santiago, Chile.,Geroscience Center for Brain Health and Metabolism, Santiago, Chile
| | - Felipe Muñoz
- Anatomy and Developmental Biology Program, Institute of Biomedical Sciences, University of Chile, Santiago, Chile.,Geroscience Center for Brain Health and Metabolism, Santiago, Chile
| | - Alenka Lovy
- Department of Neuroscience, Center for Neuroscience Research, Tufts School of Medicine, Boston, MA, United States
| | - César Cárdenas
- Anatomy and Developmental Biology Program, Institute of Biomedical Sciences, University of Chile, Santiago, Chile.,Geroscience Center for Brain Health and Metabolism, Santiago, Chile.,The Buck Institute for Research on Aging, Novato, CA, United States.,Department of Chemistry and Biochemistry, University of California, Santa Barbara, Santa Barbara, CA, United States
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3
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Urra FA, Córdova-Delgado M, Lapier M, Orellana-Manzano A, Acevedo-Arévalo L, Pessoa-Mahana H, González-Vivanco JM, Martínez-Cifuentes M, Ramírez-Rodríguez O, Millas-Vargas JP, Weiss-López B, Pavani M, Ferreira J, Araya-Maturana R. Small structural changes on a hydroquinone scaffold determine the complex I inhibition or uncoupling of tumoral oxidative phosphorylation. Toxicol Appl Pharmacol 2015; 291:46-57. [PMID: 26712467 DOI: 10.1016/j.taap.2015.12.005] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2015] [Revised: 12/12/2015] [Accepted: 12/15/2015] [Indexed: 12/31/2022]
Abstract
Mitochondria participate in several distinctiveness of cancer cell, being a promising target for the design of anti-cancer compounds. Previously, we described that ortho-carbonyl hydroquinone scaffold 14 inhibits the complex I-dependent respiration with selective anti-proliferative effect on mouse mammary adenocarcinoma TA3/Ha cancer cells; however, the structural requirements of this hydroquinone scaffold to affect the oxidative phosphorylation (OXPHOS) of cancer cells have not been studied in detail. Here, we characterize the mitochondrial metabolism of TA3/Ha cancer cells, which exhibit a high oxidative metabolism, and evaluate the effect of small structural changes of the hydroquinone scaffold 14 on the respiration of this cell line. Our results indicate that these structural changes modify the effect on OXPHOS, obtaining compounds with three alternative actions: inhibitors of complex I-dependent respiration, uncoupler of OXPHOS and compounds with both actions. To confirm this, the effect of a bicyclic hydroquinone (9) was evaluated in isolated mitochondria. Hydroquinone 9 increased mitochondrial respiration in state 4o without effects on the ADP-stimulated respiration (state 3ADP), decreasing the complexes I and II-dependent respiratory control ratio. The effect on mitochondrial respiration was reversed by 6-ketocholestanol addition, indicating that this hydroquinone is a protonophoric uncoupling agent. In intact TA3/Ha cells, hydroquinone 9 caused mitochondrial depolarization, decreasing intracellular ATP and NAD(P)H levels and GSH/GSSG ratio, and slightly increasing the ROS levels. Moreover, it exhibited selective NAD(P)H availability-dependent anti-proliferative effect on cancer cells. Therefore, our results indicate that the ortho-carbonyl hydroquinone scaffold offers the possibility to design compounds with specific actions on OXPHOS of cancer cells.
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Affiliation(s)
- Félix A Urra
- Programa de Farmacología Molecular y Clínica, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Independencia 1027, Casilla 7, Santiago, Chile.
| | - Miguel Córdova-Delgado
- Departamento de Química Orgánica y Físico-Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago 1, Chile
| | - Michel Lapier
- Programa de Farmacología Molecular y Clínica, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Independencia 1027, Casilla 7, Santiago, Chile
| | - Andrea Orellana-Manzano
- Programa de Farmacología Molecular y Clínica, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Independencia 1027, Casilla 7, Santiago, Chile
| | - Luis Acevedo-Arévalo
- Departamento de Química Orgánica y Físico-Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago 1, Chile
| | - Hernán Pessoa-Mahana
- Departamento de Química Orgánica y Físico-Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago 1, Chile
| | - Jaime M González-Vivanco
- Departamento de Química Orgánica y Físico-Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago 1, Chile
| | | | - Oney Ramírez-Rodríguez
- Departamento de Química Orgánica y Físico-Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago 1, Chile
| | - Juan Pablo Millas-Vargas
- Departamento de Química Orgánica y Físico-Química, Facultad de Ciencias Químicas y Farmacéuticas, Universidad de Chile, Casilla 233, Santiago 1, Chile
| | - Boris Weiss-López
- Departamento de Química, Facultad de Ciencias, Universidad de Chile, Casilla 653, Santiago, Chile
| | - Mario Pavani
- Programa de Farmacología Molecular y Clínica, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Independencia 1027, Casilla 7, Santiago, Chile
| | - Jorge Ferreira
- Programa de Farmacología Molecular y Clínica, Instituto de Ciencias Biomédicas (ICBM), Facultad de Medicina, Universidad de Chile, Independencia 1027, Casilla 7, Santiago, Chile.
| | - Ramiro Araya-Maturana
- Instituto de Química de Recursos Naturales, Universidad de Talca, Casilla 747, Talca, Chile.
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4
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Current topics on inhibitors of respiratory complex I. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2015; 1857:884-91. [PMID: 26625959 DOI: 10.1016/j.bbabio.2015.11.009] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2015] [Revised: 10/26/2015] [Accepted: 11/17/2015] [Indexed: 12/12/2022]
Abstract
There are a variety of chemicals which regulate the functions of bacterial and mitochondrial complex I. Some of them, such as rotenone and piericidin A, have been indispensable molecular tools in mechanistic studies on complex I. A large amount of experimental data characterizing the actions of complex I inhibitors has been accumulated so far. Recent X-ray crystallographic structural models of entire complex I may be helpful to carefully interpret this data. We herein focused on recent hot topics on complex I inhibitors and the subjects closely connected to these inhibitors, which may provide useful information not only on the structural and functional aspects of complex I, but also on drug design targeting this enzyme. This article is part of a Special Issue entitled Respiratory complex I, edited by Volker Zickermann and Ulrich Brandt.
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5
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Fletcher CJ, Wheelhouse KMP, Aggarwal VK. Stereoselective Total Synthesis of (+)-Giganin and Its C10 Epimer by Using Late-Stage Lithiation-Borylation Methodology. Angew Chem Int Ed Engl 2013; 52:2503-6. [DOI: 10.1002/anie.201208403] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Indexed: 11/07/2022]
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6
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Fletcher CJ, Wheelhouse KMP, Aggarwal VK. Stereoselective Total Synthesis of (+)-Giganin and Its C10 Epimer by Using Late-Stage Lithiation-Borylation Methodology. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201208403] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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7
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Persich P, Kerschbaumer J, Helling S, Hildmann B, Wibbeling B, Haufe G. Transannular O-heterocyclization: a useful tool for the total synthesis of Murisolin and 16,19-cis-Murisolin. Org Lett 2012; 14:5628-31. [PMID: 23137072 DOI: 10.1021/ol302820c] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Transannular O-heterocyclization is applied as a key step in a total synthesis. This highly stereoselective and metal-free transformation introduces four stereocenters in one step. It was chosen to be the pivotal step in the synthesis of Murisolin and 16,19-cis-Murisolin, two annonaceous acetogenins. The efficiency of this synthesis is further illustrated by a stereodivergent late-stage separation of both synthetic routes.
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Affiliation(s)
- Peter Persich
- Westfälische Wilhelms-Universität Münster, Organisch-Chemisches Institut, Corrensstrasse 40, D-48149 Münster, Germany
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8
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Papa S, Martino PL, Capitanio G, Gaballo A, De Rasmo D, Signorile A, Petruzzella V. The oxidative phosphorylation system in mammalian mitochondria. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2012; 942:3-37. [PMID: 22399416 DOI: 10.1007/978-94-007-2869-1_1] [Citation(s) in RCA: 169] [Impact Index Per Article: 14.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
The chapter provides a review of the state of art of the oxidative phosphorylation system in mammalian mitochondria. The sections of the paper deal with: (i) the respiratory chain as a whole: redox centers of the chain and protonic coupling in oxidative phosphorylation (ii) atomic structure and functional mechanism of protonmotive complexes I, III, IV and V of the oxidative phosphorylation system (iii) biogenesis of oxidative phosphorylation complexes: mitochondrial import of nuclear encoded subunits, assembly of oxidative phosphorylation complexes, transcriptional factors controlling biogenesis of the complexes. This advanced knowledge of the structure, functional mechanism and biogenesis of the oxidative phosphorylation system provides a background to understand the pathological impact of genetic and acquired dysfunctions of mitochondrial oxidative phosphorylation.
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Affiliation(s)
- Sergio Papa
- Department of Basic Medical Sciences, University of Bari, Bari, Italy.
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9
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Bis-THF motif of acetogenin binds to the third matrix-side loop of ND1 subunit in mitochondrial NADH-ubiquinone oxidoreductase. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2011; 1807:1170-6. [DOI: 10.1016/j.bbabio.2011.05.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/01/2011] [Revised: 05/06/2011] [Accepted: 05/10/2011] [Indexed: 11/17/2022]
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10
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Sinha PK, Torres-Bacete J, Nakamaru-Ogiso E, Castro-Guerrero N, Matsuno-Yagi A, Yagi T. Critical roles of subunit NuoH (ND1) in the assembly of peripheral subunits with the membrane domain of Escherichia coli NDH-1. J Biol Chem 2009; 284:9814-23. [PMID: 19189973 PMCID: PMC2665103 DOI: 10.1074/jbc.m809468200] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2008] [Revised: 01/28/2009] [Indexed: 11/06/2022] Open
Abstract
The bacterial proton-translocating NADH:quinone oxidoreductase (NDH-1) consists of two domains, a peripheral arm and a membrane arm. NuoH is a counterpart of ND1, which is one of seven mitochondrially encoded hydrophobic subunits, and is considered to be involved in quinone/inhibitor binding. Sequence comparison in a wide range of species showed that NuoH is comprehensively conserved, particularly with charged residues in the cytoplasmic side loops. We have constructed 40 mutants of 27 conserved residues predicted to be in the cytoplasmic side loops of Escherichia coli NuoH by utilizing the chromosomal DNA manipulation technique and investigated roles of these residues. Mutants of Arg(37), Arg(46), Asp(63), Gly(134), Gly(145), Arg(148), Glu(220), and Glu(228) showed low deamino-NADH-K(3)Fe(CN)(6) reductase activity, undetectable NDH-1 in Blue Native gels, low contents of peripheral subunits (especially NuoB and NuoCD) bound to the membranes, and a significant loss of the membrane potential and proton-pumping function coupled to deamino-NADH oxidation. The results indicated that these conserved residues located in the cytoplasmic side loops are essential for the assembly of the peripheral subunits with the membrane arm. Implications for the involvement of NuoH (ND1) in maintaining the structure and function of NDH-1 are discussed.
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Affiliation(s)
- Prem Kumar Sinha
- Division of Biochemistry, Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, California 92037, USA
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11
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Exploring the binding site of acetogenin in the ND1 subunit of bovine mitochondrial complex I. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2009; 1787:1106-11. [PMID: 19265669 DOI: 10.1016/j.bbabio.2009.02.016] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/28/2009] [Revised: 02/19/2009] [Accepted: 02/20/2009] [Indexed: 11/20/2022]
Abstract
125I-labeled (trifluoromethyl)phenyldiazirinyl acetogenin, [125I]TDA, a photoaffinity labeling probe of acetogenin, photo-cross-links to the ND1 subunit of bovine heart mitochondrial NADH-ubiquinone oxidoreductase (complex I) with high specificity [M. Murai, A. Ishihara, T. Nishioka, T. Yagi, and H. Miyoshi, (2007) The ND1 subunit constructs the inhibitor binding domain in bovine heart mitochondrial complex I, Biochemistry 46 6409-6416.]. To identify the binding site of [125I]TDA in the ND1 subunit, we carried out limited proteolysis of the subunit cross-linked by [125I]TDA using various proteases and carefully analyzed the fragmentation patterns. Our results revealed that the cross-linked residue is located within the region of the 4th to 5th transmembrane helices (Val144-Glu192) of the subunit. It is worth noting that an excess amount of short-chain ubiquinones such as ubiquinone-2 (Q2) and 2-azido-Q2 suppressed the cross-linking by [125I]TDA in a concentration-dependent way. Although the question of whether the binding sites for ubiquinone and different inhibitors in complex I are identical remains to be answered, the present study provided, for the first time, direct evidence that an inhibitor (acetogenin) and ubiquinone competitively bind to the enzyme. Considering the present results along with earlier photoaffinity labeling studies, we propose that not all inhibitors acting at the terminal electron transfer step of complex I necessarily bind to the ubiquinone binding site itself.
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12
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Bombasaro JA, Masman MF, Santágata LN, Freile ML, Rodríguez AM, Enriz RD. A Comprehensive Conformational Analysis of Bullacin B, a Potent Inhibitor of Complex I. Molecular Dynamics Simulations and Ab Initio Calculations. J Phys Chem A 2008; 112:7426-38. [DOI: 10.1021/jp801962x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- José A. Bombasaro
- Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis (UNSL) and IMIBIO-SL, Chacabuco 917, 5700 San Luis, Argentina, and Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Km 4. Comodoro Rivadavia, 9000 Chubut, Argentina
| | - Marcelo F. Masman
- Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis (UNSL) and IMIBIO-SL, Chacabuco 917, 5700 San Luis, Argentina, and Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Km 4. Comodoro Rivadavia, 9000 Chubut, Argentina
| | - Luis N. Santágata
- Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis (UNSL) and IMIBIO-SL, Chacabuco 917, 5700 San Luis, Argentina, and Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Km 4. Comodoro Rivadavia, 9000 Chubut, Argentina
| | - Mónica L. Freile
- Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis (UNSL) and IMIBIO-SL, Chacabuco 917, 5700 San Luis, Argentina, and Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Km 4. Comodoro Rivadavia, 9000 Chubut, Argentina
| | - Ana M. Rodríguez
- Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis (UNSL) and IMIBIO-SL, Chacabuco 917, 5700 San Luis, Argentina, and Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Km 4. Comodoro Rivadavia, 9000 Chubut, Argentina
| | - Ricardo D. Enriz
- Facultad de Química, Bioquímica y Farmacia, Universidad Nacional de San Luis (UNSL) and IMIBIO-SL, Chacabuco 917, 5700 San Luis, Argentina, and Facultad de Ciencias Naturales, Universidad Nacional de la Patagonia San Juan Bosco (UNPSJB), Km 4. Comodoro Rivadavia, 9000 Chubut, Argentina
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13
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Abe M, Kubo A, Yamamoto S, Hatoh Y, Murai M, Hattori Y, Makabe H, Nishioka T, Miyoshi H. Dynamic Function of the Spacer Region of Acetogenins in the Inhibition of Bovine Mitochondrial NADH-Ubiquinone Oxidoreductase (Complex I). Biochemistry 2008; 47:6260-6. [DOI: 10.1021/bi800506s] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Masato Abe
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Akina Kubo
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Shuhei Yamamoto
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Yoshinori Hatoh
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Masatoshi Murai
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Yasunao Hattori
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Hidefumi Makabe
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Takaaki Nishioka
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
| | - Hideto Miyoshi
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan, and Interdisciplinary Graduate School of Science and Technology, Satellite Venture Business Laboratory, and Science of Functional Foods, Graduate School of Agriculture, Shinshu University, Kami-ina, Nagano 399-4598, Japan
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14
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Liu HX, Huang GR, Zhang HM, Wu JR, Yao ZJ. Annonaceous acetogenin mimics bearing a terminal lactam and their cytotoxicity against cancer cells. Bioorg Med Chem Lett 2007; 17:3426-30. [PMID: 17433671 DOI: 10.1016/j.bmcl.2007.03.084] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2006] [Revised: 03/08/2007] [Accepted: 03/27/2007] [Indexed: 11/24/2022]
Abstract
Annonaceous acetogenins are a large class of naturally occurring polyketides exhibiting potent anticancer activities. Based on our previous discovery of AA005, a multi-ether mimic of natural acetogenins having potent antitumor activities and significant selectivity between normal cells and cancer cells, a new series of mimics containing a terminal lactam were designed, synthesized and evaluated. Bioactivity study against cancer cells shows that the N-methylated lactam-containing compounds 3, 4, and 5 exhibit comparable potencies to that of AA005, as well as the similar selectivity to cancer cells. Hydrocarbon-length effects of N-alkyl were further explored through synthesizing derivatives 24-26, and application of this derivation protocol to the fluorescent labeling was also investigated.
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Affiliation(s)
- Hai-Xia Liu
- State Key Laboratory of Bioorganic and Natural Product Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
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15
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Liu HX, Huang GR, Zhang HM, Jiang S, Wu JR, Yao ZJ. A structure-activity guided strategy for fluorescent labeling of annonaceous acetogenin mimetics and their application in cell biology. Chembiochem 2007; 8:172-7. [PMID: 17183523 DOI: 10.1002/cbic.200600411] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Hai-Xia Liu
- State Key Laboratory of Bioorganic and Natural Product Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, China
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16
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Glover CJ, Rabow AA, Isgor YG, Shoemaker RH, Covell DG. Data mining of NCI's anticancer screening database reveals mitochondrial complex I inhibitors cytotoxic to leukemia cell lines. Biochem Pharmacol 2006; 73:331-40. [PMID: 17109823 PMCID: PMC1808352 DOI: 10.1016/j.bcp.2006.10.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2006] [Revised: 10/05/2006] [Accepted: 10/09/2006] [Indexed: 10/23/2022]
Abstract
Mitochondria are principal mediators of apoptosis and thus can be considered molecular targets for new chemotherapeutic agents in the treatment of cancer. Inhibitors of mitochondrial complex I of the electron transport chain have been shown to induce apoptosis and exhibit antitumor activity. In an effort to find novel complex I inhibitors which exhibited anticancer activity in the NCI's tumor cell line screen, we examined organized tumor cytotoxicity screening data available as SOM (self-organized maps) (http://www.spheroid.ncifcrf.gov) at the developmental therapeutics program (DTP) of the National Cancer Institute (NCI). Our analysis focused on an SOM cluster comprised of compounds which included a number of known mitochondrial complex I (NADH:CoQ oxidoreductase) inhibitors. From these clusters 10 compounds whose mechanism of action was unknown were tested for inhibition of complex I activity in bovine heart sub-mitochondrial particles (SMP) resulting in the discovery that 5 of the 10 compounds demonstrated significant inhibition with IC50's in the nM range for three of the five. Examination of screening profiles of the five inhibitors toward the NCI's tumor cell lines revealed that they were cytotoxic to the leukemia subpanel (particularly K562 cells). Oxygen consumption experiments with permeabilized K562 cells revealed that the five most active compounds inhibited complex I activity in these cells in the same rank order and similar potency as determined with bovine heart SMP. Our findings thus fortify the appeal of mitochondrial complex I as a possible anticancer molecular target and provide a data mining strategy for selecting candidate inhibitors for further testing.
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Affiliation(s)
- Constance J Glover
- Developmental Therapeutics Program, National Cancer Institute at Frederick, Frederick, MD 21702, USA.
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17
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Roche Y, Peretti P, Bernard S. Influence of the chain length of ubiquinones on their interaction with DPPC in mixed monolayers. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2006; 1758:468-78. [PMID: 16631108 DOI: 10.1016/j.bbamem.2006.03.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2005] [Revised: 03/13/2006] [Accepted: 03/14/2006] [Indexed: 10/24/2022]
Abstract
The thermodynamic behavior of representative short (UQ2), middle (UQ4 and UQ6) and long-chain (UQ10) ubiquinones (UQ) mixed with dipalmitoyl-phosphatidylcholine (DPPC) was studied in monolayers at the air-water interface. The influence of isoprenoid chain-length of UQ on miscibility of both lipids was investigated by analysis of surface pressure-area isotherms and using fluorescence microscopy. Analysis of excess areas (A(ex)) and free energies of mixing (DeltaGm), calculated from compression isotherms in the full range of ubiquinones concentrations, has given evidences for UQ-rich constant-size (UQ6, UQ10) or less growth limited (UQ2, UQ4) microdomains formation within mixed films. Fluorescence microscopy observation revealed that ubiquinones are preferentially soluble in the expanded phase. When lateral pressure increased, concomitant evolutions of A(ex) and DeltaGm parameters, and composition dependence of collapse surface pressures, argue for an evolution towards a total segregation, never reached due to expulsion of ubiquinones from the film. The possible significance of these observations is discussed in relation to ubiquinones organization and similar chain length effects in membranes.
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Affiliation(s)
- Yann Roche
- Paris Descartes University, Biomedical research center, Laboratoire de Neuro-Physique Cellulaire, 45 rue des Saints-Pères, 75270 Paris Cedex 06, France
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18
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Andreani A, Granaiola M, Leoni A, Locatelli A, Morigi R, Rambaldi M, Recanatini M, Lenaz G, Fato R, Bergamini C. Effects of new ubiquinone-imidazo[2,1-b]thiazoles on mitochondrial complex I (NADH-ubiquinone reductase) and on mitochondrial permeability transition pore. Bioorg Med Chem 2005; 12:5525-32. [PMID: 15465329 DOI: 10.1016/j.bmc.2004.08.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2004] [Accepted: 08/10/2004] [Indexed: 10/26/2022]
Abstract
In this work we describe the synthesis of a series of imidazo[2,1-b]thiazoles and 2,3-dihydroimidazo[2,1-b]thiazoles connected by means of a methylene bridge to CoQ(0). These compounds were tested as specific inhibitors of the NADH:ubiquinone reductase activity in mitochondrial membranes. The imidazothiazole system when bound to the quinone ring in place of the isoprenoid lateral side chain, may increase the inhibitory effect (with an IC(50) for NADH-Q(1) activity ranging between 0.25 and 0.96 microM) whereas the benzoquinone moiety seems to lose the capability to accept electrons from complex I as indicated by very low maximal velocity elicited by the compounds tested. Moreover the low rotenone sensitivity for almost all of these compounds suggests that they are only partially able to interact with the physiological ubiquinone-reduction site. The compounds were investigated for the capability of increasing the permeability transition of the inner mitochondrial membrane in isolated mitochondria. Unlike CoQ(0), which is considered a mitochondrial membrane permeability transition inhibitor, the new compounds were inducers.
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Affiliation(s)
- Aldo Andreani
- Dipartimento di Scienze Farmaceutiche, Universitá di Bologna, Via Belmeloro 6, 40126 Bologna, Italy.
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19
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Ichimaru N, Murai M, Abe M, Hamada T, Yamada Y, Makino S, Nishioka T, Makabe H, Makino A, Kobayashi T, Miyoshi H. Synthesis and Inhibition Mechanism of Δlac-Acetogenins, a Novel Type of Inhibitor of Bovine Heart Mitochondrial Complex I. Biochemistry 2004; 44:816-25. [PMID: 15641810 DOI: 10.1021/bi0479003] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We have synthesized Deltalac-acetogenins that are new acetogenin mimics possessing two n-alkyl tails without an alpha,beta-unsaturated gamma-lactone ring and suggested that their inhibition mechanism may be different from that of common acetogenins [Hamada et al. (2004) Biochemistry 43, 3651-3658]. To elucidate the inhibition mechanism of Deltalac-acetogenins in more detail, we carried out wide structural modifications of original Deltalac-acetogenins and characterized the inhibitory action with bovine heart mitochondrial complex I. In contrast to common acetogenins, both the presence of adjacent bis-THF rings and the stereochemistry around the hydroxylated bis-THF rings are important structural factors required for potent inhibition. The inhibitory potency of a derivative possessing an n-butylphenyl ether structure (compound 7) appeared to be superior to that of the original Deltalac-acetogenins and equivalent to that of bullatacin, one of the most potent natural acetogenins. Double-inhibitor titration of steady-state complex I activity showed that the extent of inhibition of compound 7 and bullatacin is not additive, suggesting that the binding sites of the two inhibitors are not identical. Competition tests using a fluorescent ligand indicated that the binding site of compound 7 does not overlap with that of other complex I inhibitors. The effects of compound 7 on superoxide production from complex I are also different from those of other complex I inhibitors. Our results clearly demonstrate that Deltalac-acetogenins are a novel type of inhibitor acting at the terminal electron-transfer step of bovine complex I.
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Affiliation(s)
- Naoya Ichimaru
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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Makabe H, Hattori Y, Kimura Y, Konno H, Abe M, Miyoshi H, Tanaka A, Oritani T. Total synthesis of cis-solamin and its inhibitory action with bovine heart mitochondrial complex I. Tetrahedron 2004. [DOI: 10.1016/j.tet.2004.09.011] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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21
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Raynaud-Le Grandic S, Fourneau C, Laurens A, Bories C, Hocquemiller R, Loiseau PM. In vitro antileishmanial activity of acetogenins from Annonaceae. Biomed Pharmacother 2004; 58:388-92. [PMID: 15271421 DOI: 10.1016/j.biopha.2004.02.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2004] [Accepted: 02/23/2004] [Indexed: 11/26/2022] Open
Abstract
Twelve acetogenins from Annonaceae were evaluated in vitro for their antileishmanial activities in order to search for new lead-compounds having antileishmanial properties. The compounds were comparatively evaluated by the 50% inhibitory concentrations (IC50) determination on promastigote forms of wild-type and four drug-resistant lines of Leishmania donovani. In addition, after testing the toxicity on mouse peritoneal macrophages, the compounds were evaluated on amastigote infected macrophages and a therapeutic index was calculated. The IC50 of the acetogenins against promastigote forms of L. donovani was in a range 4.7-47.3 microM. The most active compound was Rolliniastatin 1 (IC50 at 4.7 microM). On the intramacrophage amastigote in vitro model, only seven compounds exhibited measurable antileishmanial activity with IC50 values in a range 2.5-29.7 microM. Rollinistatin 1 was the most interesting compound with IC50 of 2.5 microM and it appears as the most promising one on the basis of therapeutic index (18.08). Isoannonacin, which is active against intramacrophagic amastigotes (IC50 of 6.2 microM) with a therapeutic index of 2.05, exhibited a strong action on drug-resistant strains (IC50 from 5.1 to 9.8 microM). Acetogenins are a new chemical series with interesting in vitro antileishmanial activity and further studies will be focused on the understanding of this selectivity in regard to the membrane and mitochondrial action using specific probes.
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Affiliation(s)
- S Raynaud-Le Grandic
- Laboratoire de Phytotechnologie, EA 2085, Faculté de Pharmacie, Université Picardie Jules Verne, 80037 Amiens, France
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22
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Hamada T, Ichimaru N, Abe M, Fujita D, Kenmochi A, Nishioka T, Zwicker K, Brandt U, Miyoshi H. Synthesis and Inhibitory Action of Novel Acetogenin Mimics with Bovine Heart Mitochondrial Complex I†. Biochemistry 2004; 43:3651-8. [PMID: 15035635 DOI: 10.1021/bi030242m] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Studies on the inhibition mechanism of acetogenins, the most potent inhibitors of complex I, are useful to elucidate the structural and functional features of the terminal electron-transfer step of this enzyme. We synthesized acetogenin mimics that possess two alkyl tails without a gamma-lactone ring, named Deltalac-acetogenin, and examined their inhibitory action on bovine heart mitochondrial complex I. Unexpectedly, the Deltalac-acetogenin carrying two n-undecanyl groups (compound 3) elicited very potent inhibition comparable to that of bullatacin. The inhibitory potency of compound 3 markedly decreased with shortening the length of either or both alkyl tails, indicating that symmetric as well as hydrophobic properties of the inhibitor are important for the inhibition. Both acetylation and deoxygenation of either or both of two OH groups adjacent to the tetrahydrofuran (THF) rings resulted in a significant decrease in inhibitory potency. These structural dependencies of the inhibitory action of Deltalac-acetogenins are in marked contrast to those of ordinary acetogenins. Double-inhibitor titration of steady-state complex I activity showed that inhibition of compound 3 and bullatacin are not additive, though the inhibition site of both inhibitors is downstream of iron-sulfur cluster N2. Our results indicate that the mode of inhibitory action of Deltalac-acetogenins differs from that of ordinary acetogenins. Therefore, Deltalac-acetogenins can be regarded as a novel type of inhibitor acting on the terminal electron-transfer step of complex I.
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Affiliation(s)
- Takeshi Hamada
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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23
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Abe M, Kenmochi A, Ichimaru N, Hamada T, Nishioka T, Miyoshi H. Essential structural features of acetogenins: role of hydroxy groups adjacent to the bis-THF rings. Bioorg Med Chem Lett 2004; 14:779-82. [PMID: 14741288 DOI: 10.1016/j.bmcl.2003.11.021] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
The presence of two hydroxy groups adjacent to the THF ring(s) is a common structural feature of natural acetogenins. To elucidate the role of each hydroxy group in the inhibitory action of acetogenins, we synthesized three acetogenin analogues which lack either or both of the hydroxy groups, and investigated their inhibitory activities with bovine heart mitochondrial complex I. Our results indicate that the presence of either of the two hydroxy groups sufficiently sustains a potent inhibitory effect.
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Affiliation(s)
- Masato Abe
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, Kyoto 606-8502, Japan
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24
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Yamashita T, Ino T, Miyoshi H, Sakamoto K, Osanai A, Nakamaru-Ogiso E, Kita K. Rhodoquinone reaction site of mitochondrial complex I, in parasitic helminth, Ascaris suum. BIOCHIMICA ET BIOPHYSICA ACTA-BIOENERGETICS 2004; 1608:97-103. [PMID: 14871486 DOI: 10.1016/j.bbabio.2003.10.006] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/08/2003] [Revised: 10/10/2003] [Accepted: 10/17/2003] [Indexed: 11/19/2022]
Abstract
The components and organization of the respiratory chain in helminth mitochondria vary remarkably depending upon the stage of the life cycle. Mitochondrial complex I in the parasitic helminth Ascaris suum uses ubiquinone-9 (UQ(9)) and rhodoquinone-9 (RQ(9)) under aerobic and anaerobic conditions, respectively. In this study, we investigated structural features of the quinone reduction site of A. suum complex I using a series of quinazoline-type inhibitors and also by the kinetic analysis of rhodoquinone-2 (RQ(2)) and ubiquinone-2 (UQ(2)) reduction. Structure-activity profiles of the inhibition by quinazolines were comparable, but not completely identical, between NADH-RQ(2) and NADH-UQ(2) oxidoreductase activities. However, the inhibitory mechanism of quinazolines was competitive and partially competitive against RQ(2) and UQ(2), respectively. The pH profiles of both activities differed remarkably; NADH-RQ(2) oxidoreductase activity showed an optimum pH at 7.6, whereas NADH-UQ(2) oxidoreductase activity showed two optima pH at 6.4 and 7.2. Our results indicate that although A. suum complex I uses both RQ(2) and UQ(2) as an electron acceptor, the manner of reaction (or binding) of the two quinones differs.
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Affiliation(s)
- Tetsuo Yamashita
- Department of Biomedical Chemistry, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
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25
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Ino T, Nishioka T, Miyoshi H. Characterization of inhibitor binding sites of mitochondrial complex I using fluorescent inhibitor. BIOCHIMICA ET BIOPHYSICA ACTA 2003; 1605:15-20. [PMID: 12907297 DOI: 10.1016/s0005-2728(03)00060-4] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Recent progress in complex I research suggests that a wide variety of complex I inhibitors share a common large binding domain with partially overlapping sites. To verify this concept, we carried out real-time displacement tests of a fluorescent ligand with various competitors using a novel quinazoline-type inhibitor (aminoquinazoline, AQ). In the presence of an excess amount of the competitors, the binding of AQ to the enzyme was completely suppressed, being in line with the concept mentioned above. However, AQ bound to the enzyme was not displaced by subsequent addition of an increasing amount of competitors in the concentration range expected from the relative magnitude of the K(d) values of AQ and competitors, rather, much higher concentrations of the competitors were needed to displace bound AQ. These results cannot be explained merely by the premise of a common or partially overlapping binding site(s) between AQ and competitors. On the other hand, double-inhibitor titration of steady state complex I activity suggested that additivity of inhibition is not necessarily observed for all pairs of complex I inhibitors. Our results are discussed in light of the cooperativity of the inhibitor binding sites.
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Affiliation(s)
- Takara Ino
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kita-shirakawa, Sakyo-ku, 606-8502, Kyoto, Japan
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26
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Nakamaru-Ogiso E, Seo BB, Yagi T, Matsuno-Yagi A. Amiloride inhibition of the proton-translocating NADH-quinone oxidoreductase of mammals and bacteria. FEBS Lett 2003; 549:43-6. [PMID: 12914922 DOI: 10.1016/s0014-5793(03)00766-x] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
The proton-translocating NADH-quinone oxidoreductase in mitochondria (complex I) and bacteria (NDH-1) was shown to be inhibited by amiloride derivatives that are known as specific inhibitors for Na(+)/H(+) exchangers. In bovine submitochondrial particles, the effective concentrations were about the same as those for the Na(+)/H(+) exchangers, whereas in bacterial membranes the inhibitory potencies were lower. These results together with our earlier observation that the amiloride analogues prevent labeling of the ND5 subunit of complex I with a fenpyroximate analogue suggest the involvement of ND5 in H(+) (Na(+)) translocation and no direct involvement of electron carriers in H(+) (Na(+)) translocation.
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Affiliation(s)
- Eiko Nakamaru-Ogiso
- Department of Molecular and Experimental Medicine, MEM-256, The Scripps Research Institute, 10550 Torrey Pines Road, La Jolla, CA 92037, USA
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27
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Yabunaka H, Abe M, Kenmochi A, Hamada T, Nishioka T, Miyoshi H. Synthesis and inhibitory activity of ubiquinone-acetogenin hybrid inhibitor with bovine mitochondrial complex I. Bioorg Med Chem Lett 2003; 13:2385-8. [PMID: 12824040 DOI: 10.1016/s0960-894x(03)00439-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
To elucidate the inhibitory action of acetogenins, the most potent inhibitors of mitochondrial complex I, we synthesized an acetogenin analogue which possesses a ubiquinone ring (i.e., the physiological substrate of complex I) in place of the alpha,beta-unsaturated gamma-lactone ring of natural acetogenins, and named it Q-acetogenin. Our results indicate that the gamma-lactone ring of acetogenins is completely substitutable with the ubiquinone ring. This fact is discussed in light of the inhibitory action of acetogenins.
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Affiliation(s)
- Hiromi Yabunaka
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, 606-8502, Kyoto, Japan
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28
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Yagi T, Matsuno-Yagi A. The proton-translocating NADH-quinone oxidoreductase in the respiratory chain: the secret unlocked. Biochemistry 2003; 42:2266-74. [PMID: 12600193 DOI: 10.1021/bi027158b] [Citation(s) in RCA: 222] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Takao Yagi
- Department of Molecular and Experimental Medicine, MEM-256, The Scripps Research Institute, 10550 North Torrey Pines Road, La Jolla, California 92037, USA.
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29
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Nakamaru-Ogiso E, Sakamoto K, Matsuno-Yagi A, Miyoshi H, Yagi T. The ND5 subunit was labeled by a photoaffinity analogue of fenpyroximate in bovine mitochondrial complex I. Biochemistry 2003; 42:746-54. [PMID: 12534287 DOI: 10.1021/bi0269660] [Citation(s) in RCA: 83] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Fenpyroximate is a potent inhibitor of the mitochondrial proton-translocating NADH-quinone oxidoreductase (complex I). We synthesized its photoaffinity analogue [(3)H](trifluoromethyl)phenyldiazirinylfenpyroximate ([(3)H]TDF). When bovine heart submitochondrial particles (SMP) were illuminated with UV light in the presence of [(3)H]TDF, radioactivity was mostly incorporated into a 50 kDa band. There was a good correlation between radioactivity labeling of the 50 kDa band and inhibition of the NADH oxidase activity, indicating that a 50 kDa protein is responsible for the inactivation of complex I. Blue native gel electrophoresis of the [(3)H]TDF-labeled SMP revealed that the majority of radioactivity was found in complex I. Analysis of the complex I band on an SDS gel showed a major peak of radioactivity at approximately 50 kDa. There are three subunits in complex I that migrate in this region: FP51K, IP49K, and ND5. Further analysis using the 2D gel electrophoresis implied that the labeled protein was the ND5 subunit. Labeling of the ND5 subunit was stimulated by NADH/NADPH but was prevented by various complex I inhibitors. Amiloride derivatives that are known to be inhibitors of Na(+)/H(+) antiporters also diminished the labeling. In agreement with the protective effect, we observed that the amiloride derivatives inhibited NADH-ubiquinone-1 reductase activity but not NADH-K(3)Fe(CN)(6) reductase activity in bovine SMP. These results suggest that the ND5 subunit is involved in construction of the inhibitor- and quinone-binding site(s). Furthermore, it seems likely that the ND5 subunit may participate in H(+)(Na(+)) translocation in coupling site 1.
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Affiliation(s)
- Eiko Nakamaru-Ogiso
- Division of Biochemistry, Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, California 92037, USA
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30
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Yabunaka H, Kenmochi A, Nakatogawa Y, Sakamoto K, Miyoshi H. Hybrid ubiquinone: novel inhibitor of mitochondrial complex I. BIOCHIMICA ET BIOPHYSICA ACTA 2002; 1556:106-12. [PMID: 12460667 DOI: 10.1016/s0005-2728(02)00341-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
We synthesized novel ubiquinone analogs by hybridizing the natural ubiquinone ring (2,3-dimethoxy-5-methyl-1,4-benzoquinone) and hydrophobic phenoxybenzamide unit, and named them hybrid ubiquinones (HUs). The HUs worked as electron transfer substrates with bovine heart mitochondrial succinate-ubiquinone oxidoreductase (complex II) and ubiquinol-cytochrome c oxidoreductase (complex III), but not with NADH-ubiquinone oxidoreductase (complex I). With complex I, they acted as inhibitors in a noncompetitive manner against exogenous short-chain ubiquinones irrespective of the presence of the natural ubiquinone ring. Elongation of the distance between the ubiquinone ring and the phenoxybenzamide unit did not recover the electron accepting activity. The structure/activity study showed that high structural specificity of the phenoxybenzamide moiety is required to act as a potent inhibitor of complex I. These findings indicate that binding of the HUs to complex I is mainly decided by some specific interaction of the phenoxybenzamide moiety with the enzyme. It is of interest that an analogous bulky and hydrophobic substructure can be commonly found in recently registered synthetic pesticides the action site of which is mitochondrial complex I.
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Affiliation(s)
- Hiromi Yabunaka
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Kita-shirakawa, Sakyo-ku, 606-8502, Kyoto, Japan
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Abstract
The energy-transducing NADH: quinone (Q) oxidoreductase (complex I) is the largest and most complicated enzyme complex in the oxidative phosphorylation system. Complex I is a redox pump that uses the redox energy to translocate H(+) (or Na(+)) ions across the membrane, resulting in a significant contribution to energy production. The need to elucidate the molecular mechanisms of complex I has greatly increased. Many devastating neurodegenerative disorders have been associated with complex I deficiency. The structural and functional complexities of complex I have already been established. However, intricate biogenesis and activity regulation functions of complex I have just been identified. Based upon these recent developments, it is apparent that complex I research is entering a new era. The advancement of our knowledge of the molecular mechanism of complex I will not only surface from bioenergetics, but also from many other fields as well, including medicine. This review summarizes the current status of our understanding of complex I and sheds light on new theories and the future direction of complex I studies.
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Affiliation(s)
- Takahiro Yano
- Department of Biochemistry and Biophysics, School of Medicine, Johnson Research Foundation, University of Pennsylvania, Philadelphia, PA 19104-6059, USA.
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32
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Motoyama T, Yabunaka H, Miyoshi H. Essential structural factors of acetogenins, potent inhibitors of mitochondrial complex I. Bioorg Med Chem Lett 2002; 12:2089-92. [PMID: 12127510 DOI: 10.1016/s0960-894x(02)00374-8] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
To elucidate the role of the hydrophobic alkyl tail of acetogenins in the inhibitory action, we synthesized an acetogenin derivative possessing the shortest tail (i.e., methyl group) and examined its inhibitory activity against bovine heart mitochondrial complex I. Our results indicated that the alkyl tail, which is one of the common structural features of natural acetogenins, is not an essential structural factor required for the potent inhibition.
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Affiliation(s)
- Tomoko Motoyama
- Division of Applied Life Sciences, Graduate School of Agriculture, Kyoto University, Sakyo-ku, 606-8502, Kyoto, Japan
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