1
|
Mattison KA, Tossing G, Mulroe F, Simmons C, Butler KM, Schreiber A, Alsadah A, Neilson DE, Naess K, Wedell A, Wredenberg A, Sorlin A, McCann E, Burghel GJ, Menendez B, Hoganson GE, Botto LD, Filloux FM, Aledo-Serrano Á, Gil-Nagel A, Tatton-Brown K, Verbeek NE, van der Zwaag B, Aleck KA, Fazenbaker AC, Balciuniene J, Dubbs HA, Marsh ED, Garber K, Ek J, Duno M, Hoei-Hansen CE, Deardorff MA, Raca G, Quindipan C, van Hirtum-Das M, Breckpot J, Hammer TB, Møller RS, Whitney A, Douglas AGL, Kharbanda M, Brunetti-Pierri N, Morleo M, Nigro V, May HJ, Tao JX, Argilli E, Sherr EH, Dobyns WB, Baines RA, Warwicker J, Parker JA, Banka S, Campeau PM, Escayg A. ATP6V0C variants impair V-ATPase function causing a neurodevelopmental disorder often associated with epilepsy. Brain 2023; 146:1357-1372. [PMID: 36074901 PMCID: PMC10319782 DOI: 10.1093/brain/awac330] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Revised: 07/29/2022] [Accepted: 08/14/2022] [Indexed: 11/14/2022] Open
Abstract
The vacuolar H+-ATPase is an enzymatic complex that functions in an ATP-dependent manner to pump protons across membranes and acidify organelles, thereby creating the proton/pH gradient required for membrane trafficking by several different types of transporters. We describe heterozygous point variants in ATP6V0C, encoding the c-subunit in the membrane bound integral domain of the vacuolar H+-ATPase, in 27 patients with neurodevelopmental abnormalities with or without epilepsy. Corpus callosum hypoplasia and cardiac abnormalities were also present in some patients. In silico modelling suggested that the patient variants interfere with the interactions between the ATP6V0C and ATP6V0A subunits during ATP hydrolysis. Consistent with decreased vacuolar H+-ATPase activity, functional analyses conducted in Saccharomyces cerevisiae revealed reduced LysoSensor fluorescence and reduced growth in media containing varying concentrations of CaCl2. Knockdown of ATP6V0C in Drosophila resulted in increased duration of seizure-like behaviour, and the expression of selected patient variants in Caenorhabditis elegans led to reduced growth, motor dysfunction and reduced lifespan. In summary, this study establishes ATP6V0C as an important disease gene, describes the clinical features of the associated neurodevelopmental disorder and provides insight into disease mechanisms.
Collapse
Affiliation(s)
- Kari A Mattison
- Genetics and Molecular Biology Graduate Program, Graduate Division of Biological and Biomedical Sciences, Laney Graduate School, Emory University, Atlanta, GA, USA
- Department of Human Genetics, Emory University, Atlanta, GA, USA
| | - Gilles Tossing
- Department of Neuroscience, University of Montreal, Montreal, QC, Canada
| | - Fred Mulroe
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Center, Manchester, UK
| | - Callum Simmons
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Center, Manchester, UK
| | - Kameryn M Butler
- Department of Human Genetics, Emory University, Atlanta, GA, USA
- Greenwood Genetics Center, Greenwood, SC, USA
| | - Alison Schreiber
- Center for Personalized Genetic Healthcare, Cleveland Clinic, Cleveland, OH, USA
| | - Adnan Alsadah
- Center for Personalized Genetic Healthcare, Cleveland Clinic, Cleveland, OH, USA
| | - Derek E Neilson
- Division of Genetics and Metabolism, Department of Child Health, The University of Arizona College of Medicine, Phoenix, AZ, USA
- Department of Genetics and Metabolism, Phoenix Children’s Hospital, Phoenix Children’s Medical Group, Phoenix, AZ, USA
| | - Karin Naess
- Center for Inherited Metabolic Diseases, Karolinska University Hospital, Stockholm, Sweden
- Department of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm, Sweden
| | - Anna Wedell
- Center for Inherited Metabolic Diseases, Karolinska University Hospital, Stockholm, Sweden
- Deparment of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
| | - Anna Wredenberg
- Center for Inherited Metabolic Diseases, Karolinska University Hospital, Stockholm, Sweden
- Department of Medical Biochemistry and Biophysics, Karolinska Institute, Stockholm, Sweden
| | - Arthur Sorlin
- National Center of Genetics, Laboratoire National de Santé, Dudelange, Luxembourg
| | - Emma McCann
- Liverpool Center for Genomic Medicine, Liverpool Women’s Hospital, Liverpool, UK
| | - George J Burghel
- Genomic Diagnostic Laboratory, St. Mary’s Hospital, Manchester University NHS Foundation Trust, Manchester, UK
| | | | - George E Hoganson
- Division of Genetics, Department of Pediatrics, University of Illinois College of Medicine, Chicago, IL, USA
| | - Lorenzo D Botto
- Division of Medical Genetics, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Francis M Filloux
- Division of Pediatric Neurology, Department of Pediatrics, University of Utah School of Medicine, Salt Lake City, UT, USA
| | - Ángel Aledo-Serrano
- Genetic Epilepsy Program, Department of Neurology, Ruber International Hospital, Madrid, Spain
| | - Antonio Gil-Nagel
- Genetic Epilepsy Program, Department of Neurology, Ruber International Hospital, Madrid, Spain
| | - Katrina Tatton-Brown
- Medical Genetics, St. George’s University Hospitals NHS Foundation Trust and Institute for Molecular and Cell Sciences, St. George’s, University of London, London, UK
| | - Nienke E Verbeek
- Department of Genetics, University Medical Center Utrecht, Member of the ERN EpiCARE, Utrecht, The Netherlands
| | - Bert van der Zwaag
- Department of Genetics, University Medical Center Utrecht, Member of the ERN EpiCARE, Utrecht, The Netherlands
| | - Kyrieckos A Aleck
- Division of Genetics and Metabolism, Department of Child Health, The University of Arizona College of Medicine, Phoenix, AZ, USA
- Department of Genetics and Metabolism, Phoenix Children’s Hospital, Phoenix Children’s Medical Group, Phoenix, AZ, USA
| | - Andrew C Fazenbaker
- Department of Genetics and Metabolism, Phoenix Children’s Hospital, Phoenix Children’s Medical Group, Phoenix, AZ, USA
| | - Jorune Balciuniene
- Divison of Genomic Diagnostics, Department of Pathology and Laboratory Medicine, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
- PerkinElmer Genomics, Pittsburgh, PA, USA
| | - Holly A Dubbs
- Division of Neurology, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Eric D Marsh
- Division of Neurology, Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| | - Kathryn Garber
- Department of Human Genetics, Emory University, Atlanta, GA, USA
| | - Jakob Ek
- Department of Clinical Genetics, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Morten Duno
- Department of Clinical Genetics, University Hospital of Copenhagen, Copenhagen, Denmark
| | - Christina E Hoei-Hansen
- Department of Pediatrics, University Hospital of Copenhagen, Copenhagen, Denmark
- Department of Clinical Medicine, University of Copenhagen, Copenhagen, Denmark
| | - Matthew A Deardorff
- Department of Pathology and Laboratory Medicine, Children’s Hospital Los Angeles, Los Angeles, CA, USA
- Department of Pediatrics, Division of Medical Genetics, Children’s Hospital Los Angeles, Los Angeles, CA, USA
- Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Gordana Raca
- Department of Pathology and Laboratory Medicine, Children’s Hospital Los Angeles, Los Angeles, CA, USA
- Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Catherine Quindipan
- Center for Personalized Medicine, Children’s Hospital Los Angeles, Los Angeles, CA, USA
| | - Michele van Hirtum-Das
- Department of Pediatrics, Division of Medical Genetics, Children’s Hospital Los Angeles, Los Angeles, CA, USA
- Keck School of Medicine, University of Southern California, Los Angeles, CA, USA
| | - Jeroen Breckpot
- Center for Human Genetics, University Hospitals Leuven, Leuven, Belgium
| | - Trine Bjørg Hammer
- Department of Epilepsy Genetics and Personalized Medicine, Danish Epilepsy Center, Fildelfia, Dianalund, Denmark
| | - Rikke S Møller
- Department of Epilepsy Genetics and Personalized Medicine, Danish Epilepsy Center, Fildelfia, Dianalund, Denmark
- Insititue for Regional Health Services Research, University of Southern Denmark, Odense, Denmark
| | - Andrea Whitney
- Pediatric Neurology, University Hospital Southampton NHS Foundation Trust, Southampton, UK
| | - Andrew G L Douglas
- Wessex Clinical Genetics Service, University of Southampton, Southampton, UK
- Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Mira Kharbanda
- Human Development and Health, Faculty of Medicine, University of Southampton, Southampton, UK
| | - Nicola Brunetti-Pierri
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
- Department of Translational Medicine, Federico II University of Naples, Naples, Italy
| | - Manuela Morleo
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
- Department of Precision Medicine, University of Campania ‘Luigi Vanvitelli’, Naples, Italy
| | - Vincenzo Nigro
- Telethon Institute of Genetics and Medicine (TIGEM), Pozzuoli, Italy
- Department of Precision Medicine, University of Campania ‘Luigi Vanvitelli’, Naples, Italy
| | - Halie J May
- Institute for Genomic Medicine, Columbia University Irving Medical Center, New York, NY, USA
| | - James X Tao
- Department of Neurology, University of Chicago, Chicago, IL, USA
| | - Emanuela Argilli
- Department of Neurology, University of California, San Francisco, San Francisco, CA, USA
- Pediatrics Institute of Human Genetics and Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA, USA
| | - Elliot H Sherr
- Department of Neurology, University of California, San Francisco, San Francisco, CA, USA
- Pediatrics Institute of Human Genetics and Weill Institute for Neurosciences, University of California, San Francisco, San Francisco, CA, USA
| | - William B Dobyns
- Department of Pediatrics, Division of Genetics and Metabolism, University of Minnesota, Minneapolis, MN, USA
| | | | - Richard A Baines
- Division of Neuroscience and Experimental Psychology, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester Academic Health Science Center, Manchester, UK
| | - Jim Warwicker
- School of Biological Sciences, Faculty of Biology, Medicine and Health, Manchester Institute of Biotechnology, University of Manchester, Manchester, UK
| | - J Alex Parker
- Department of Neuroscience, University of Montreal, Montreal, QC, Canada
| | - Siddharth Banka
- Division of Evolution, Infection, and Genomics, School of Biological Sciences, Faculty of Biology, Medicine and Health, University of Manchester, Manchester, UK
| | | | - Andrew Escayg
- Department of Human Genetics, Emory University, Atlanta, GA, USA
| |
Collapse
|
2
|
Acidification of endothelial Weibel-Palade bodies is mediated by the vacuolar-type H+-ATPase. PLoS One 2022; 17:e0270299. [PMID: 35767558 PMCID: PMC9242466 DOI: 10.1371/journal.pone.0270299] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2022] [Accepted: 06/07/2022] [Indexed: 12/02/2022] Open
Abstract
Weibel-Palade bodies (WPB) are unique secretory granules of endothelial cells that store the procoagulant von-Willebrand factor (VWF) in a highly compacted form. Upon exocytosis the densely packed VWF unfurls into long strands that expose binding sites for circulating platelets and thereby initiate the formation of a platelet plug at sites of blood vessel injury. Dense packing of VWF requires the establishment of an acidic pH in the lumen of maturing WPB but the mechanism responsible for this acidification has not yet been fully established. We show here that subunits of the vacuolar-type H+-ATPase are present on mature WPB and that interference with the proton pump activity of the ATPase employing inhibitors of different chemical nature blocks a reduction in the relative internal pH of WPB. Furthermore, depletion of the V-ATPase subunit V0d1 from primary endothelial cells prevents WPB pH reduction and the establishment of an elongated morphology of WPB that is dictated by the densely packed VWF tubules. Thus, the vacuolar-type H+-ATPase present on WPB is required for proper acidification and maturation of the organelle.
Collapse
|
3
|
Keon KA, Benlekbir S, Kirsch SH, Müller R, Rubinstein JL. Cryo-EM of the Yeast V O Complex Reveals Distinct Binding Sites for Macrolide V-ATPase Inhibitors. ACS Chem Biol 2022; 17:619-628. [PMID: 35148071 DOI: 10.1021/acschembio.1c00894] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Vacuolar-type adenosine triphosphatases (V-ATPases) are proton pumps found in almost all eukaryotic cells. These enzymes consist of a soluble catalytic V1 region that hydrolyzes ATP and a membrane-embedded VO region responsible for proton translocation. V-ATPase activity leads to acidification of endosomes, phagosomes, lysosomes, secretory vesicles, and the trans-Golgi network, with extracellular acidification occurring in some specialized cells. Small-molecule inhibitors of V-ATPase have played a crucial role in elucidating numerous aspects of cell biology by blocking acidification of intracellular compartments, while therapeutic use of V-ATPase inhibitors has been proposed for the treatment of cancer, osteoporosis, and some infections. Here, we determine structures of the isolated VO complex from Saccharomyces cerevisiae bound to two well-known macrolide inhibitors: bafilomycin A1 and archazolid A. The structures reveal different binding sites for the inhibitors on the surface of the proton-carrying c ring, with only a small amount of overlap between the two sites. Binding of both inhibitors is mediated primarily through van der Waals interactions in shallow pockets and suggests that the inhibitors block rotation of the ring. Together, these structures indicate the existence of a large chemical space available for V-ATPase inhibitors that block acidification by binding the c ring.
Collapse
Affiliation(s)
- Kristine A. Keon
- Molecular Medicine Program, The Hospital for Sick Children, Toronto, Canada M5G0A4
- Department of Medical Biophysics, The University of Toronto, Toronto, Canada M5G1L7
| | - Samir Benlekbir
- Molecular Medicine Program, The Hospital for Sick Children, Toronto, Canada M5G0A4
| | - Susanne H. Kirsch
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University Campus, 66123 Saarbrücken, Germany
| | - Rolf Müller
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University Campus, 66123 Saarbrücken, Germany
| | - John L. Rubinstein
- Molecular Medicine Program, The Hospital for Sick Children, Toronto, Canada M5G0A4
- Department of Medical Biophysics, The University of Toronto, Toronto, Canada M5G1L7
- Department of Biochemistry, The University of Toronto, Toronto, Canada M5S1A8
| |
Collapse
|
4
|
Scheeff S, Rivière S, Ruiz J, Dedenbach S, Menche D. Modular Total Synthesis of iso-Archazolids and Archazologs. J Org Chem 2021; 86:10190-10223. [PMID: 34293866 DOI: 10.1021/acs.joc.1c00946] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Full details on the design, development, and successful implementation of suitable synthetic strategies directed toward the total synthesis of iso-archazolids and archazologs are reported. Both a biomimetic and a multistep total synthesis of iso-archazolid B, the most potent and least abundant archazolid, are described. The bioinspired conversion from archazolid B was realized by a high-yielding 1,8-Diazabicyclo[5.4.0]undec-7-ene catalyzed one-step double-bond shift. A highly stereoselective total synthesis was accomplished in 25 steps, involving a sequence of highly stereoselective aldol reactions, an efficient aldol condensation to forge two elaborate fragments, and a challenging ring-closing metathesis macrocyclization with an unusual Stewart-Grubbs catalyst. These strategies proved to be generally useful and could be successfully implemented for the preparation of three novel iso-archazolids as well as five novel archazologs, lacking the thiazole side chain. A wide variety of further archazolids and archazologs may now be targeted for exploration of the promising anticancer potential of these polyketide macrolides.
Collapse
Affiliation(s)
- Stephan Scheeff
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| | - Solenne Rivière
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| | - Johal Ruiz
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| | - Simon Dedenbach
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| | - Dirk Menche
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| |
Collapse
|
5
|
Menche D. Design and Synthesis of Simplified Polyketide Analogs: New Modalities beyond the Rule of 5. ChemMedChem 2021; 16:2068-2074. [PMID: 33755304 PMCID: PMC8360190 DOI: 10.1002/cmdc.202100150] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Indexed: 12/29/2022]
Abstract
Natural products provide important lead structures for development of pharmaceutical agents or present attractive tools for medicinal chemistry. However, structurally complex and thus less accessible metabolites defying conventional drug-like properties, as expressed by Pfizer's rule of five, have received less attention as medicinal leads. Traditionally, research focus has been on realizing total syntheses rather than developing more readily available analogs to resolve the critical supply issue. However, very recent studies with complex myxobacterial polyketides have demonstrated that considerable structural simplification may be realized with retention of biological potencies. The context, underlying rationale and importance of tailored synthetic strategies of three such case studies are presented, which may inspire further related activities and may eventually help exploiting the largely untapped biological potential of complex metabolites in general.
Collapse
Affiliation(s)
- Dirk Menche
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard-Domagk-Strasse 153121BonnGermany
| |
Collapse
|
6
|
Rivière S, Vielmuth C, Ennenbach C, Abdelrahman A, Lemke C, Gütschow M, Müller CE, Menche D. Design, Synthesis and Biological Evaluation of Highly Potent Simplified Archazolids. ChemMedChem 2020; 15:1348-1363. [PMID: 32363789 PMCID: PMC7496434 DOI: 10.1002/cmdc.202000154] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Indexed: 01/25/2023]
Abstract
The archazolids are potent antiproliferative compounds that have recently emerged as a novel class of promising anticancer agents. Their complex macrolide structures and scarce natural supply make the development of more readily available analogues highly important. Herein, we report the design, synthesis and biological evaluation of four simplified and partially saturated archazolid derivatives. We also reveal important structure-activity relationship data as well as insights into the pharmacophore of these complex polyketides.
Collapse
Affiliation(s)
- Solenne Rivière
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard-Domagk-Strasse 153121BonnGermany
| | - Christin Vielmuth
- Pharmazeutische & Medizinische ChemiePharmazeutisches InstitutUniversität BonnAn der Immenburg 453121BonnGermany
| | - Christiane Ennenbach
- Pharmazeutische & Medizinische ChemiePharmazeutisches InstitutUniversität BonnAn der Immenburg 453121BonnGermany
| | - Aliaa Abdelrahman
- Pharmazeutische & Medizinische ChemiePharmazeutisches InstitutUniversität BonnAn der Immenburg 453121BonnGermany
| | - Carina Lemke
- Pharmazeutische & Medizinische ChemiePharmazeutisches InstitutUniversität BonnAn der Immenburg 453121BonnGermany
| | - Michael Gütschow
- Pharmazeutische & Medizinische ChemiePharmazeutisches InstitutUniversität BonnAn der Immenburg 453121BonnGermany
| | - Christa E. Müller
- Pharmazeutische & Medizinische ChemiePharmazeutisches InstitutUniversität BonnAn der Immenburg 453121BonnGermany
| | - Dirk Menche
- Kekulé-Institut für Organische Chemie und BiochemieUniversität BonnGerhard-Domagk-Strasse 153121BonnGermany
| |
Collapse
|
7
|
Scheeff S, Rivière S, Ruiz J, Abdelrahman A, Schulz-Fincke AC, Köse M, Tiburcy F, Wieczorek H, Gütschow M, Müller CE, Menche D. Synthesis of Novel Potent Archazolids: Pharmacology of an Emerging Class of Anticancer Drugs. J Med Chem 2020; 63:1684-1698. [DOI: 10.1021/acs.jmedchem.9b01887] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Stephan Scheeff
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, D-53121 Bonn, Germany
| | - Solenne Rivière
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, D-53121 Bonn, Germany
| | - Johal Ruiz
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, D-53121 Bonn, Germany
| | - Aliaa Abdelrahman
- Pharmazeutisches Institut, Universität Bonn, An der Immenburg 4, D-53121 Bonn, Germany
| | | | - Meryem Köse
- Pharmazeutisches Institut, Universität Bonn, An der Immenburg 4, D-53121 Bonn, Germany
| | - Felix Tiburcy
- Fachbereich Biologie/Chemie, Universität Osnabrück, D-49069 Osnabrück, Germany
| | - Helmut Wieczorek
- Fachbereich Biologie/Chemie, Universität Osnabrück, D-49069 Osnabrück, Germany
| | - Michael Gütschow
- Pharmazeutisches Institut, Universität Bonn, An der Immenburg 4, D-53121 Bonn, Germany
| | - Christa E. Müller
- Pharmazeutisches Institut, Universität Bonn, An der Immenburg 4, D-53121 Bonn, Germany
| | - Dirk Menche
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Str. 1, D-53121 Bonn, Germany
| |
Collapse
|
8
|
Affiliation(s)
- Stephan Scheeff
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, D-53121 Bonn, Germany
| | - Dirk Menche
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, D-53121 Bonn, Germany
| |
Collapse
|
9
|
The vacuolar-type ATPase inhibitor archazolid increases tumor cell adhesion to endothelial cells by accumulating extracellular collagen. PLoS One 2018; 13:e0203053. [PMID: 30204757 PMCID: PMC6133348 DOI: 10.1371/journal.pone.0203053] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Accepted: 08/14/2018] [Indexed: 11/19/2022] Open
Abstract
The vacuolar-type H+-ATPase (v-ATPase) is the major proton pump that acidifies intracellular compartments of eukaryotic cells. Since the inhibition of v-ATPase resulted in anti-tumor and anti-metastatic effects in different tumor models, this enzyme has emerged as promising strategy against cancer. Here, we used the well-established v-ATPase inhibitor archazolid, a natural product first isolated from the myxobacterium Archangium gephyra, to study the consequences of v-ATPase inhibition in endothelial cells (ECs), in particular on the interaction between ECs and cancer cells, which has been neglected so far. Human endothelial cells treated with archazolid showed an increased adhesion of tumor cells, whereas the transendothelial migration of tumor cells was reduced. The adhesion process was independent from the EC adhesion molecules ICAM-1, VCAM-1, E-selectin and N-cadherin. Instead, the adhesion was mediated by β1-integrins expressed on tumor cells, as blocking of the integrin β1 subunit reversed this process. Tumor cells preferentially adhered to the β1-integrin ligand collagen and archazolid led to an increase in the amount of collagen on the surface of ECs. The accumulation of collagen was accompanied by a strong decrease of the expression and activity of the protease cathepsin B. Overexpression of cathepsin B in ECs prevented the capability of archazolid to increase the adhesion of tumor cells onto ECs. Our study demonstrates that the inhibition of v-ATPase by archazolid induces a pro-adhesive phenotype in endothelial cells that promotes their interaction with cancer cells, whereas the transmigration of tumor cells was reduced. These findings further support archazolid as a promising anti-metastatic compound.
Collapse
|
10
|
Harrison MA, Muench SP. The Vacuolar ATPase - A Nano-scale Motor That Drives Cell Biology. Subcell Biochem 2018; 87:409-459. [PMID: 29464568 DOI: 10.1007/978-981-10-7757-9_14] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The vacuolar H+-ATPase (V-ATPase) is a ~1 MDa membrane protein complex that couples the hydrolysis of cytosolic ATP to the transmembrane movement of protons. In essentially all eukaryotic cells, this acid pumping function plays critical roles in the acidification of endosomal/lysosomal compartments and hence in transport, recycling and degradative pathways. It is also important in acid extrusion across the plasma membrane of some cells, contributing to homeostatic control of cytoplasmic pH and maintenance of appropriate extracellular acidity. The complex, assembled from up to 30 individual polypeptides, operates as a molecular motor with rotary mechanics. Historically, structural inferences about the eukaryotic V-ATPase and its subunits have been made by comparison to the structures of bacterial homologues. However, more recently, we have developed a much better understanding of the complete structure of the eukaryotic complex, in particular through advances in cryo-electron microscopy. This chapter explores these recent developments, and examines what they now reveal about the catalytic mechanism of this essential proton pump and how its activity might be regulated in response to cellular signals.
Collapse
Affiliation(s)
- Michael A Harrison
- School of Biomedical Sciences, Faculty of Biological Sciences, The University of Leeds, Leeds, UK.
| | - Steven P Muench
- School of Biomedical Sciences, Faculty of Biological Sciences, The University of Leeds, Leeds, UK
| |
Collapse
|
11
|
Tapia-Paniagua ST, Ceballos-Francisco D, Balebona MC, Esteban MÁ, Moriñigo MÁ. Mucus glycosylation, immunity and bacterial microbiota associated to the skin of experimentally ulcered gilthead seabream (Sparus aurata). FISH & SHELLFISH IMMUNOLOGY 2018; 75:381-390. [PMID: 29421587 DOI: 10.1016/j.fsi.2018.02.006] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2017] [Revised: 01/24/2018] [Accepted: 02/02/2018] [Indexed: 05/25/2023]
Abstract
Interest in fish skin immunity and its associated microbiota has greatly increased among immunologists. The objective of this study is to know if skin ulcers may be associated with changes in the mucus composition and microbial diversity. The abundance of terminal carbohydrates, several enzymes (protease, antiprotease, peroxidase, lysozyme) and total immunoglobulin M levels were evaluated in skin mucus of experimentally ulcered gilthead seabream (Sparus aurata L.). Furthermore, the composition of the microbiota of ulcered and non-ulcered skin has been determined using Illumina Miseq technology. Significant decreases of terminal abundance of α-D-mannose, α-D-glucose and N-acetyl-galactosamine in skin mucus of ulcered fish, compared to control fish were detected. The levels of IgM and all the tested enzymes in mucus were decreased in ulcered fish (compared to control fish) although the observed decreases were only statistically significant for proteases and antiproteases. Concomitantly, the analysis of the composition of the skin microbiota showed clear differences between ulcered and non-ulcered areas. The genus taxonomic analysis showed that Staphylococcus and Lactobacillus were more abundant in non-ulcered skin whereas in ulcered area were Streptococcus and Granulicatella. Important decreases of the number of sequences related to Alteromonas, Thalassabius and Winogradskyella were detected in ulcered skin whilst slight increases of sequences related to Flavobacterium, Chryseobacterium and Tenacibaculum genera were observed. Overall these results demonstrated that the presence of skin ulcers provide microenvironments that perturb both the mucus composition and microbial biodiversity of this important external surface which seem to be more vulnerable to diseases.
Collapse
Affiliation(s)
- Silvana Teresa Tapia-Paniagua
- Group of Prophylaxis and Biocontrol of Fish Diseases, Departamento de Microbiología, Campus de Teatinos s/n, Universidad de Málaga, 29071 Málaga, Spain
| | - Diana Ceballos-Francisco
- Department of Cell Biology and Histology, Faculty of Biology, Campus Regional de Excelencia Internacional "Campus Mare Nostrum", University of Murcia, 30100, Murcia, Spain
| | - M Carmen Balebona
- Group of Prophylaxis and Biocontrol of Fish Diseases, Departamento de Microbiología, Campus de Teatinos s/n, Universidad de Málaga, 29071 Málaga, Spain
| | - María Ángeles Esteban
- Department of Cell Biology and Histology, Faculty of Biology, Campus Regional de Excelencia Internacional "Campus Mare Nostrum", University of Murcia, 30100, Murcia, Spain
| | - Miguel Ángel Moriñigo
- Group of Prophylaxis and Biocontrol of Fish Diseases, Departamento de Microbiología, Campus de Teatinos s/n, Universidad de Málaga, 29071 Málaga, Spain.
| |
Collapse
|
12
|
Bartel K, Winzi M, Ulrich M, Koeberle A, Menche D, Werz O, Müller R, Guck J, Vollmar AM, von Schwarzenberg K. V-ATPase inhibition increases cancer cell stiffness and blocks membrane related Ras signaling - a new option for HCC therapy. Oncotarget 2018; 8:9476-9487. [PMID: 28036299 PMCID: PMC5354746 DOI: 10.18632/oncotarget.14339] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2016] [Accepted: 12/12/2016] [Indexed: 11/25/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is the fifth most frequent cancer worldwide and the third leading cause of cancer-related death. However, therapy options are limited leaving an urgent need to develop new strategies. Currently, targeting cancer cell lipid and cholesterol metabolism is gaining interest especially regarding HCC. High cholesterol levels support proliferation, membrane-related mitogenic signaling and increase cell softness, leading to tumor progression, malignancy and invasive potential. However, effective ways to target cholesterol metabolism for cancer therapy are still missing. The V-ATPase inhibitor archazolid was recently shown to interfere with cholesterol metabolism. In our study, we report a novel therapeutic potential of V-ATPase inhibition in HCC by altering the mechanical phenotype of cancer cells leading to reduced proliferative signaling. Archazolid causes cellular depletion of free cholesterol leading to an increase in cell stiffness and membrane polarity of cancer cells, while hepatocytes remain unaffected. The altered membrane composition decreases membrane fluidity and leads to an inhibition of membrane-related Ras signaling resulting decreased proliferation in vitro and in vivo. V-ATPase inhibition represents a novel link between cell biophysical properties and proliferative signaling selectively in malignant HCC cells, providing the basis for an attractive and innovative strategy against HCC.
Collapse
Affiliation(s)
- Karin Bartel
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany
| | - Maria Winzi
- Biotechnology Center, Technische Universität Dresden, 01307 Dresden, Germany
| | - Melanie Ulrich
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany
| | - Andreas Koeberle
- Chair of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Dirk Menche
- Kekulé Institute of Organic Chemistry and Biochemistry, University of Bonn, 53121 Bonn, Germany
| | - Oliver Werz
- Chair of Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Friedrich Schiller University Jena, 07743 Jena, Germany
| | - Rolf Müller
- Department of Microbial Natural Products, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS) - Helmholtz Centre for Infection Research (HZI), Saarland University, 66123 Saarbrücken, Germany
| | - Jochen Guck
- Biotechnology Center, Technische Universität Dresden, 01307 Dresden, Germany
| | - Angelika M Vollmar
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany
| | - Karin von Schwarzenberg
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University of Munich, 81377 Munich, Germany
| |
Collapse
|
13
|
Kissing S, Saftig P, Haas A. Vacuolar ATPase in phago(lyso)some biology. Int J Med Microbiol 2017; 308:58-67. [PMID: 28867521 DOI: 10.1016/j.ijmm.2017.08.007] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2017] [Revised: 07/28/2017] [Accepted: 08/23/2017] [Indexed: 12/23/2022] Open
Abstract
Many eukaryotic cells ingest extracellular particles in a process termed phagocytosis which entails the generation of a new intracellular compartment, the phagosome. Phagosomes change their composition over time and this maturation process culminates in their fusion with acidic, hydrolase-rich lysosomes. During the maturation process, degradation and, when applicable, killing of the cargo may ensue. Many of the events that are pathologically relevant depend on strong acidification of phagosomes by the 'vacuolar' ATPase (V-ATPase). This protein complex acidifies the lumen of some intracellular compartments at the expense of ATP hydrolysis. We discuss here the roles and importance of V-ATPase in intracellular trafficking, its distribution, inhibition and activities, its role in the defense against microorganisms and the counteractivities of pathogens.
Collapse
Affiliation(s)
- Sandra Kissing
- Institut für Biochemie, Christian-Albrechts-Universität zu Kiel, Olshausenstrasse 40, D-24098 Kiel, Germany
| | - Paul Saftig
- Institut für Biochemie, Christian-Albrechts-Universität zu Kiel, Olshausenstrasse 40, D-24098 Kiel, Germany.
| | - Albert Haas
- Institut für Zellbiologie, Friedrich-Wilhelms-Universität Bonn, Ulrich-Haberland-Str. 61A, D-53121 Bonn, Germany.
| |
Collapse
|
14
|
Scheeff S, Menche D. Total syntheses of the archazolids: an emerging class of novel anticancer drugs. Beilstein J Org Chem 2017; 13:1085-1098. [PMID: 28684988 PMCID: PMC5480361 DOI: 10.3762/bjoc.13.108] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2017] [Accepted: 05/09/2017] [Indexed: 12/19/2022] Open
Abstract
V-ATPase has recently emerged as a promising novel anticancer target based on extensive in vitro and in vivo studies with the archazolids, complex polyketide macrolides which present the most potent V-ATPase inhibitors known to date, rendering these macrolides important lead structures for the development of novel anticancer agents. The limited natural supply of these metabolites from their myxobacterial source renders total synthesis of vital importance for the further preclinical development. This review describes in detail the various tactics and strategies employed so far in archazolid syntheses that culminated in three total syntheses and discusses the future synthetic challenges that have to be addressed.
Collapse
Affiliation(s)
- Stephan Scheeff
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| | - Dirk Menche
- Kekulé-Institut für Organische Chemie und Biochemie, Universität Bonn, Gerhard-Domagk-Strasse 1, 53121 Bonn, Germany
| |
Collapse
|
15
|
O’Neil GW, Craig AM, Williams JR, Young JC, Spiegel PC. Synthesis of a C 1-C 23 fragment of the archazolids and evidence for V-ATPase but not COX inhibitory activity. Synlett 2017; 28:1101-1105. [PMID: 31592212 PMCID: PMC6779165 DOI: 10.1055/s-0036-1588413] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
A convergent synthesis of a C1-C23 fragment of the archazolids has been completed based on a high yielding Stille coupling to costruct the substituted Z,Z,E-conjugated triene. After removal of the protecting groups, the resulting tetrol exhibited evidence for inhibition of the vacuolar-type ATPase (V-ATPase) but not cyclooxygenase (COX) inhibitory activity.
Collapse
Affiliation(s)
- Gregory W. O’Neil
- Department of Chemistry, Western Washington University, Bellingham, WA, USA
| | - Alexander M. Craig
- Department of Chemistry, Western Washington University, Bellingham, WA, USA
| | - John R. Williams
- Department of Chemistry, Western Washington University, Bellingham, WA, USA
| | - Jeffrey C. Young
- Department of Biology, Western Washington University, Bellingham, WA, USA
| | - P. Clint Spiegel
- Department of Chemistry, Western Washington University, Bellingham, WA, USA
| |
Collapse
|
16
|
Selective upregulation of TNFα expression in classically-activated human monocyte-derived macrophages (M1) through pharmacological interference with V-ATPase. Biochem Pharmacol 2017; 130:71-82. [DOI: 10.1016/j.bcp.2017.02.004] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 02/01/2017] [Indexed: 11/21/2022]
|
17
|
Herrmann J, Fayad AA, Müller R. Natural products from myxobacteria: novel metabolites and bioactivities. Nat Prod Rep 2016; 34:135-160. [PMID: 27907217 DOI: 10.1039/c6np00106h] [Citation(s) in RCA: 149] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Covering: 2011-July 2016Myxobacteria are a rich source for structurally diverse secondary metabolites with intriguing biological activities. Here we report on new natural products that were isolated from myxobacteria in the period of 2011 to July 2016. Some examples of recent advances on modes-of-action are also summarised along with a more detailed overview on five compound classes currently assessed in preclinical studies.
Collapse
Affiliation(s)
- J Herrmann
- Helmholtz Institute for Pharmaceutical Research Saarland, Department of Microbial Natural Products, Helmholtz Centre for Infection Research and Department of Pharmaceutical Biotechnology, Saarland University, Campus E8.1, 66123 Saarbrücken, Germany.
| | | | | |
Collapse
|
18
|
Zhang S, Schneider LS, Vick B, Grunert M, Jeremias I, Menche D, Müller R, Vollmar AM, Liebl J. Anti-leukemic effects of the V-ATPase inhibitor Archazolid A. Oncotarget 2016; 6:43508-28. [PMID: 26496038 PMCID: PMC4791247 DOI: 10.18632/oncotarget.6180] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2015] [Accepted: 10/07/2015] [Indexed: 12/31/2022] Open
Abstract
Prognosis for patients suffering from T-ALL is still very poor and new strategies for T-ALL treatment are urgently needed. Our study shows potent anti-leukemic effects of the myxobacterial V-ATPase inhibitor Archazolid A. Archazolid A reduced growth and potently induced death of leukemic cell lines and human leukemic samples. By inhibiting lysosomal acidification, Archazolid A blocked activation of the Notch pathway, however, this was not the mechanism of V-ATPase inhibition relevant for cell death induction. In fact, V-ATPase inhibition by Archazolid A decreased the anti-apoptotic protein survivin. As underlying mode of action, this work is in line with recent studies from our group demonstrating that Archazolid A induced S-phase cell cycle arrest by interfering with the iron metabolism in leukemic cells. Our study provides evidence for V-ATPase inhibition as a potential new therapeutic option for T-ALL.
Collapse
Affiliation(s)
- Siwei Zhang
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University, Munich, Germany
| | - Lina S Schneider
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University, Munich, Germany
| | - Binje Vick
- Department of Gene Vectors, Helmholtz Zentrum München, German Research Center for Environmental Health, Munich, Germany.,German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Michaela Grunert
- Department of Gene Vectors, Helmholtz Zentrum München, German Research Center for Environmental Health, Munich, Germany
| | - Irmela Jeremias
- Department of Gene Vectors, Helmholtz Zentrum München, German Research Center for Environmental Health, Munich, Germany.,Department of Oncology/Hematology, Dr. von Haunersches Kinderspital, Munich, Germany.,German Cancer Consortium (DKTK), German Cancer Research Center (DKFZ), Heidelberg, Germany
| | - Dirk Menche
- Kekulé-Institut für Organische Chemie und Biochemie der Universität Bonn, Bonn, Germany
| | - Rolf Müller
- Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Department of Pharmaceutical Biotechnology, Saarland University, Saarbrücken, Germany
| | - Angelika M Vollmar
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University, Munich, Germany
| | - Johanna Liebl
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University, Munich, Germany
| |
Collapse
|
19
|
Schneider LS, Ulrich M, Lehr T, Menche D, Müller R, von Schwarzenberg K. MDM2 antagonist nutlin-3a sensitizes tumors to V-ATPase inhibition. Mol Oncol 2016; 10:1054-62. [PMID: 27157929 DOI: 10.1016/j.molonc.2016.04.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 04/19/2016] [Accepted: 04/19/2016] [Indexed: 01/08/2023] Open
Abstract
Treating cancer is one of the big challenges of this century and it has become evident that single chemotherapeutic treatment is rarely effective. As tumors often carry multiple mutations using combination therapy which addresses different targets seems therefore more beneficial. One of the most frequently mutated genes in tumors is the tumor suppressor p53. Significant work has been put in the development of p53 activators, which are now in clinical studies against diverse cancers. Recently, we could show that inhibition of V-ATPase, a multisubunit proton pump, by archazolid induces p53 protein levels in cancer cells. In this study, we provide evidence that the combination of archazolid with the p53 activator nutlin-3a is synergistically inducing cell death in different p53 wild type tumor cell lines. Mechanistically, this effect could presumably be attributed to reduction of glycolysis as TIGAR mRNA levels were increased and glucose uptake and Glut1 protein levels were reduced. In addition, combination treatment highly activated pro-apoptotic pathways including IGFBP3 and Bax inducing caspase-9 and PARP cleavage. Remarkably, combination of archazolid and nutlin-3a was more efficient in reducing tumor growth compared to single dose treatment in a U87MG mouse model in vivo. Hence, our findings suggest the combination of archazolid and nutlin-3a as a highly promising strategy for the treatment of p53 wild type tumors.
Collapse
Affiliation(s)
- Lina S Schneider
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University of Munich, Butenandtstrasse 5-13, 81377 Munich, Germany
| | - Melanie Ulrich
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University of Munich, Butenandtstrasse 5-13, 81377 Munich, Germany
| | - Thorsten Lehr
- Clinical Pharmacy, Saarland University, Campus C2 2, 66123 Saarbrücken, Germany
| | - Dirk Menche
- Kekulé Institute of Organic Chemistry and Biochemistry, University of Bonn, Gerhard-Domagk-Str. 1, 53121 Bonn, Germany
| | - Rolf Müller
- Saarland University, Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Department of Pharmaceutical Biotechnology, PO 151150, 66042 Saarbrücken, Germany
| | - Karin von Schwarzenberg
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University of Munich, Butenandtstrasse 5-13, 81377 Munich, Germany.
| |
Collapse
|
20
|
Cotter K, Stransky L, McGuire C, Forgac M. Recent Insights into the Structure, Regulation, and Function of the V-ATPases. Trends Biochem Sci 2016; 40:611-622. [PMID: 26410601 DOI: 10.1016/j.tibs.2015.08.005] [Citation(s) in RCA: 211] [Impact Index Per Article: 26.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 08/06/2015] [Accepted: 08/07/2015] [Indexed: 10/23/2022]
Abstract
The vacuolar (H(+))-ATPases (V-ATPases) are ATP-dependent proton pumps that acidify intracellular compartments and are also present at the plasma membrane. They function in such processes as membrane traffic, protein degradation, virus and toxin entry, bone resorption, pH homeostasis, and tumor cell invasion. V-ATPases are large multisubunit complexes, composed of an ATP-hydrolytic domain (V1) and a proton translocation domain (V0), and operate by a rotary mechanism. This review focuses on recent insights into their structure and mechanism, the mechanisms that regulate V-ATPase activity (particularly regulated assembly and trafficking), and the role of V-ATPases in processes such as cell signaling and cancer. These developments have highlighted the potential of V-ATPases as a therapeutic target in a variety of human diseases.
Collapse
Affiliation(s)
- Kristina Cotter
- Program in Cellular and Molecular Physiology, Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA 02111, USA
| | - Laura Stransky
- Program in Cellular and Molecular Physiology, Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA 02111, USA
| | - Christina McGuire
- Program in Biochemistry, Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA 02111, USA
| | - Michael Forgac
- Program in Cellular and Molecular Physiology, Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA 02111, USA; Program in Biochemistry, Sackler School of Graduate Biomedical Sciences, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA 02111, USA; Department of Developmental, Molecular, and Chemical Biology, Tufts University School of Medicine, 136 Harrison Avenue, Boston, MA 02111, USA.
| |
Collapse
|
21
|
Gölz JP, Bockelmann S, Mayer K, Steinhoff HJ, Wieczorek H, Huss M, Klare JP, Menche D. EPR Studies of V-ATPase with Spin-Labeled Inhibitors DCC and Archazolid: Interaction Dynamics with Proton Translocating Subunit c. ChemMedChem 2015; 11:420-8. [DOI: 10.1002/cmdc.201500500] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/23/2015] [Indexed: 01/16/2023]
Affiliation(s)
- Jan Philipp Gölz
- Kekulé-Institut für Organische Chemie und Biochemie; Rheinische Friedrich-Wilhelms-Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| | - Svenja Bockelmann
- Fachbereich Biologie/Chemie; Universität Osnabrück; 49069 Osnabrück Germany
| | - Kerstin Mayer
- Institut für Organische Chemie; Ruprecht-Karls-Universität Heidelberg; INF 270; 69120 Heidelberg Germany
| | | | - Helmut Wieczorek
- Fachbereich Biologie/Chemie; Universität Osnabrück; 49069 Osnabrück Germany
| | - Markus Huss
- Fachbereich Biologie/Chemie; Universität Osnabrück; 49069 Osnabrück Germany
| | - Johann P. Klare
- Fachbereich Physik; Universität Osnabrück; 49069 Osnabrück Germany
| | - Dirk Menche
- Kekulé-Institut für Organische Chemie und Biochemie; Rheinische Friedrich-Wilhelms-Universität Bonn; Gerhard-Domagk-Str. 1 53121 Bonn Germany
| |
Collapse
|
22
|
Swick SM, Schaefer SL, O’Neil GW. Synthesis of the C 1-C 17 fragment of the archazolids by complex cis-homodimer cross metathesis. Tetrahedron Lett 2015; 56:4039-4042. [PMID: 26257444 PMCID: PMC4525707 DOI: 10.1016/j.tetlet.2015.05.014] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A synthesis of the C1-C17 fragment of the archazolids is described featuring a complex cross-metathesis coupling reaction between a cis-homodimer (prepared by silyl-tethered ring-closing metathesis) and the Z,Z-terminal triene containing "eastern domain" of the archazolid natural products. This cross-metathesis was only successful when using the cis- as opposed to the monomer or trans-homodimer, with the cis-dimer added batchwise to minimize cis/trans-isomerization. The product was obtained in an optimized 78% yield using the Hoveyda-Grubbs catalyst at 50 °C in toluene.
Collapse
Affiliation(s)
- Steven M. Swick
- Department of Chemistry, Western Washington University, Bellingham, WA, 98225, USA
| | - Sara L. Schaefer
- Department of Chemistry, Western Washington University, Bellingham, WA, 98225, USA
| | - Gregory W. O’Neil
- Department of Chemistry, Western Washington University, Bellingham, WA, 98225, USA
| |
Collapse
|
23
|
Schneider LS, von Schwarzenberg K, Lehr T, Ulrich M, Kubisch-Dohmen R, Liebl J, Trauner D, Menche D, Vollmar AM. Vacuolar-ATPase Inhibition Blocks Iron Metabolism to Mediate Therapeutic Effects in Breast Cancer. Cancer Res 2015; 75:2863-74. [DOI: 10.1158/0008-5472.can-14-2097] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2014] [Accepted: 04/28/2015] [Indexed: 11/16/2022]
|
24
|
Chang FY, Kawashima SA, Brady SF. Mutations in the proteolipid subunits of the vacuolar H+-ATPase provide resistance to indolotryptoline natural products. Biochemistry 2014; 53:7123-31. [PMID: 25319670 PMCID: PMC4238801 DOI: 10.1021/bi501078j] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
![]()
Indolotryptoline natural products
represent a small family of structurally
unique chromopyrrolic acid-derived antiproliferative agents. Like
many prospective anticancer agents before them, the exploration of
their potential clinical utility has been hindered by the limited
information known about their mechanism of action. To study the mode
of action of two closely related indolotryptolines (BE-54017, cladoniamide
A), we selected for drug resistant mutants using a multidrug resistance-suppressed
(MDR-sup) Schizosaccharomyces pombe strain. As fission
yeast maintains many of the basic cancer-relevant cellular processes
present in human cells, it represents an appealing model to use in
determining the potential molecular target of antiproliferative natural
products through resistant mutant screening. Full genome sequencing
of resistant mutants identified mutations in the c and c′ subunits
of the proteolipid substructure of the vacuolar H+-ATPase
complex (V-ATPase). This collection of resistance-conferring mutations
maps to a site that is distant from the nucleotide-binding sites of
V-ATPase and distinct from sites found to confer resistance to known
V-ATPase inhibitors. Acid vacuole staining, cross-resistance studies,
and direct c/c′ subunit mutagenesis all suggest that indolotryptolines
are likely a structurally novel class of V-ATPase inhibitors. This
work demonstrates the general utility of resistant mutant selection
using MDR-sup S. pombe as a rapid and potentially
systematic approach for studying the modes of action of cytotoxic
natural products.
Collapse
Affiliation(s)
- Fang-Yuan Chang
- Laboratory of Genetically Encoded Small Molecules, Howard Hughes Medical Institute, The Rockefeller University , 1230 York Avenue, New York, New York 10065, United States
| | | | | |
Collapse
|
25
|
Scherer O, Steinmetz H, Kaether C, Weinigel C, Barz D, Kleinert H, Menche D, Müller R, Pergola C, Werz O. Targeting V-ATPase in primary human monocytes by archazolid potently represses the classical secretion of cytokines due to accumulation at the endoplasmic reticulum. Biochem Pharmacol 2014; 91:490-500. [PMID: 25107704 DOI: 10.1016/j.bcp.2014.07.028] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2014] [Revised: 07/25/2014] [Accepted: 07/28/2014] [Indexed: 01/08/2023]
Abstract
The macrolide archazolid inhibits vacuolar-type H(+)-ATPase (V-ATPase), a proton-translocating enzyme involved in protein transport and pH regulation of cell organelles, and potently suppresses cancer cell growth at low nanomolar concentrations. In view of the growing link between inflammation and cancer, we investigated whether inhibition of V-ATPase by archazolid may affect primary human monocytes that can promote cancer by sustaining inflammation through the release of tumor-promoting cytokines. Human primary monocytes express V-ATPase, and archazolid (10-100nM) increases the vesicular pH in these cells. Archazolid (10nM) markedly reduced the release of pro-inflammatory (TNF-α, interleukin-6 and -8) but also of anti-inflammatory (interleukin-10) cytokines in monocytes stimulated with LPS, without affecting cell viability up to 1000nM. Of interest, secretion of interleukin-1β was increased by archazolid. Comparable effects were obtained by the V-ATPase inhibitors bafilomycin and apicularen. The phosphorylation of p38 MAPK and ERK-1/2, Akt, SAPK/JNK or of the inhibitor of NFκB (IκBα) as well as mRNA expression of IL-8 were not altered by archazolid in LPS-stimulated monocytes. Instead, archazolid caused endoplasmic reticulum (ER) stress response visualized by increased BiP expression and accumulation of IL-8 (and TNF-α) at the ER, indicating a perturbation of protein secretion. In conclusion, by interference with V-ATPase, archazolid significantly affects the secretion of cytokines due to accumulation at the ER which might be of relevance when using these agents for cancer therapy.
Collapse
Affiliation(s)
- Olga Scherer
- Institute of Pharmacy, Friedrich Schiller University Jena, Philosophenweg 14, 07743 Jena, Germany
| | | | - Christoph Kaether
- Leibniz Institute for Age Research - Fritz Lipmann Institute, Jena, Germany
| | - Christina Weinigel
- Institute of Transfusion Medicine, University Hospital Jena, Jena, Germany
| | - Dagmar Barz
- Institute of Transfusion Medicine, University Hospital Jena, Jena, Germany
| | | | - Dirk Menche
- Kekulé-Institut für Organische Chemie und Biochemie der Rheinischen Friedrich-Wilhelms-Universität Bonn, Bonn, Germany
| | - Rolf Müller
- Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Pharmazeutical Biotechnology, Saarland University, Saarbrücken, Germany
| | - Carlo Pergola
- Institute of Pharmacy, Friedrich Schiller University Jena, Philosophenweg 14, 07743 Jena, Germany
| | - Oliver Werz
- Institute of Pharmacy, Friedrich Schiller University Jena, Philosophenweg 14, 07743 Jena, Germany.
| |
Collapse
|
26
|
Resistance mechanisms of cancer cells to the novel vacuolar H+-ATPase inhibitor archazolid B. Invest New Drugs 2014; 32:893-903. [DOI: 10.1007/s10637-014-0134-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2014] [Accepted: 07/07/2014] [Indexed: 02/04/2023]
|
27
|
Abstract
Reversible disassembly of their V1 and Vo complexes is a regulatory mechanism of V-ATPases as had been shown by in vitro experiments. Our in vivo results indicate that not the whole V1 complex, but only its subunit C, dissociates into the yeast cytosol.
Collapse
|
28
|
Hamm R, Chen YR, Seo EJ, Zeino M, Wu CF, Müller R, Yang NS, Efferth T. Induction of cholesterol biosynthesis by archazolid B in T24 bladder cancer cells. Biochem Pharmacol 2014; 91:18-30. [PMID: 24976507 DOI: 10.1016/j.bcp.2014.06.018] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2014] [Revised: 06/17/2014] [Accepted: 06/17/2014] [Indexed: 11/29/2022]
Abstract
BACKGROUND Resistance of cancer cells towards chemotherapeutics represents a major cause of therapy failure. The objective of our study was to evaluate cellular defense strategies in response to the novel vacuolar H(+)-ATPase inhibitor, archazolid B. EXPERIMENTAL APPROACH The effects of archazolid B on T24 bladder carcinoma cells were investigated by combining "omics" technologies (transcriptomics (mRNA and miRNA) and proteomics). Free cholesterol distribution was determined by filipin staining using flow cytometry and fluorescence microscopy. Flow cytometry was performed for LDLR surface expression studies. Uptake of LDL cholesterol was visualized by confocal microscopy. SREBP activation was determined performing Western Blotting. The efficiency of archazolid B/fluvastatin combination was tested by cytotoxicity assays. RESULTS Archazolid B led to accumulation of free cholesterol within intracellular compartments and drastic disturbances in cholesterol homeostasis resulting in activation of SREBP-2 (sterol regulatory element-binding protein 2) and up-regulation of target genes including HMGCR (HMG-CoA reductase), the key enzyme of cholesterol biosynthesis. LDLR surface expression was reduced and LDL uptake was completely inhibited after 24h, indicating newly synthesized cholesterol to be the main source of cholesterol in archazolid B treated cells. By combining archazolid B with the HMGCR inhibitor fluvastatin, cholesterol was reduced and cell viability decreased by about 20% compared to archazolid B treatment alone. CONCLUSIONS Our study revealed cholesterol biosynthesis as an important resistance mechanism in T24 cells after archazolid B treatment. The combination of archazolid B with statins may be an attractive strategy to potentiate archazolid B induced cell killing by affecting cholesterol biosynthesis.
Collapse
Affiliation(s)
- R Hamm
- Institute of Pharmacy and Biochemistry, Department of Pharmaceutical Biology, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany
| | - Y-R Chen
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
| | - Ean-Jeong Seo
- Institute of Pharmacy and Biochemistry, Department of Pharmaceutical Biology, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany
| | - Maen Zeino
- Institute of Pharmacy and Biochemistry, Department of Pharmaceutical Biology, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany
| | - Ching-Fen Wu
- Institute of Pharmacy and Biochemistry, Department of Pharmaceutical Biology, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany
| | - R Müller
- Helmholtz Institute for Pharmaceutical Research Saarland, Helmholtz Centre for Infection Research and Department of Pharmaceutical Biotechnology, Saarland University, Saarbrücken, Germany
| | - N-S Yang
- Agricultural Biotechnology Research Center, Academia Sinica, Taipei, Taiwan
| | - T Efferth
- Institute of Pharmacy and Biochemistry, Department of Pharmaceutical Biology, Johannes Gutenberg University, Staudinger Weg 5, 55128 Mainz, Germany.
| |
Collapse
|
29
|
Muench SP, Rawson S, Eyraud V, Delmas AF, Da Silva P, Phillips C, Trinick J, Harrison MA, Gressent F, Huss M. PA1b inhibitor binding to subunits c and e of the vacuolar ATPase reveals its insecticidal mechanism. J Biol Chem 2014; 289:16399-408. [PMID: 24795045 PMCID: PMC4047407 DOI: 10.1074/jbc.m113.541250] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2013] [Revised: 04/14/2014] [Indexed: 12/03/2022] Open
Abstract
The vacuolar ATPase (V-ATPase) is a 1MDa transmembrane proton pump that operates via a rotary mechanism fuelled by ATP. Essential for eukaryotic cell homeostasis, it plays central roles in bone remodeling and tumor invasiveness, making it a key therapeutic target. Its importance in arthropod physiology also makes it a promising pesticide target. The major challenge in designing lead compounds against the V-ATPase is its ubiquitous nature, such that any therapeutic must be capable of targeting particular isoforms. Here, we have characterized the binding site on the V-ATPase of pea albumin 1b (PA1b), a small cystine knot protein that shows exquisitely selective inhibition of insect V-ATPases. Electron microscopy shows that PA1b binding occurs across a range of equivalent sites on the c ring of the membrane domain. In the presence of Mg·ATP, PA1b localizes to a single site, distant from subunit a, which is predicted to be the interface for other inhibitors. Photoaffinity labeling studies show radiolabeling of subunits c and e. In addition, weevil resistance to PA1b is correlated with bafilomycin resistance, caused by mutation of subunit c. The data indicate a binding site to which both subunits c and e contribute and inhibition that involves locking the c ring rotor to a static subunit e and not subunit a. This has implications for understanding the V-ATPase mechanism and that of inhibitors with therapeutic or pesticidal potential. It also provides the first evidence for the position of subunit e within the complex.
Collapse
Affiliation(s)
- Stephen P Muench
- From the School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, LS2 9JT Leeds, West Yorkshire, United Kingdom,
| | - Shaun Rawson
- From the School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, LS2 9JT Leeds, West Yorkshire, United Kingdom
| | - Vanessa Eyraud
- Institut National de la Recherche Agronomique, Institut National des Sciences Appliquées-Lyon, Université de Lyon, IFR 41, UMR203 BF2I, Biologie Fonctionnelle Insectes et Interactions, Batiment Louis-Pasteur 20, avenue Albert Einstein, F-69621 Villeurbanne, France
| | - Agnès F Delmas
- the Centre de Biophysique Moléculaire, Centre National de la Recherche Scientifique Unité Propre de Recherche 4301, Rue Charles Sadron, 45071 Orléans cedex 2, France
| | - Pedro Da Silva
- Institut National de la Recherche Agronomique, Institut National des Sciences Appliquées-Lyon, Université de Lyon, IFR 41, UMR203 BF2I, Biologie Fonctionnelle Insectes et Interactions, Batiment Louis-Pasteur 20, avenue Albert Einstein, F-69621 Villeurbanne, France
| | - Clair Phillips
- From the School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, LS2 9JT Leeds, West Yorkshire, United Kingdom
| | - John Trinick
- the School of Molecular and Cellular Biology, Faculty of Biological Sciences, University of Leeds, LS2 9JT Leeds, West Yorkshire, United Kingdom, and
| | - Michael A Harrison
- From the School of Biomedical Sciences, Faculty of Biological Sciences, University of Leeds, LS2 9JT Leeds, West Yorkshire, United Kingdom
| | - Frédéric Gressent
- Institut National de la Recherche Agronomique, Institut National des Sciences Appliquées-Lyon, Université de Lyon, IFR 41, UMR203 BF2I, Biologie Fonctionnelle Insectes et Interactions, Batiment Louis-Pasteur 20, avenue Albert Einstein, F-69621 Villeurbanne, France
| | - Markus Huss
- Abteilung Tierphysiologie, Fachbereich Biologie/Chemie Universität Osnabrück, 49069 Osnabrück, Germany
| |
Collapse
|
30
|
Vacuolar H+-ATPase: An Essential Multitasking Enzyme in Physiology and Pathophysiology. ACTA ACUST UNITED AC 2014. [DOI: 10.1155/2014/675430] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Vacuolar H+-ATPases (V-ATPases) are large multisubunit proton pumps that are required for housekeeping acidification of membrane-bound compartments in eukaryotic cells. Mammalian V-ATPases are composed of 13 different subunits. Their housekeeping functions include acidifying endosomes, lysosomes, phagosomes, compartments for uncoupling receptors and ligands, autophagosomes, and elements of the Golgi apparatus. Specialized cells, including osteoclasts, intercalated cells in the kidney and pancreatic beta cells, contain both the housekeeping V-ATPases and an additional subset of V-ATPases, which plays a cell type specific role. The specialized V-ATPases are typically marked by the inclusion of cell type specific isoforms of one or more of the subunits. Three human diseases caused by mutations of isoforms of subunits have been identified. Cancer cells utilize V-ATPases in unusual ways; characterization of V-ATPases may lead to new therapeutic modalities for the treatment of cancer. Two accessory proteins to the V-ATPase have been identified that regulate the proton pump. One is the (pro)renin receptor and data is emerging that indicates that V-ATPase may be intimately linked to renin/angiotensin signaling both systemically and locally. In summary, V-ATPases play vital housekeeping roles in eukaryotic cells. Specialized versions of the pump are required by specific organ systems and are involved in diseases.
Collapse
|
31
|
Kubisch R, Fröhlich T, Arnold GJ, Schreiner L, von Schwarzenberg K, Roidl A, Vollmar AM, Wagner E. V-ATPase inhibition by archazolid leads to lysosomal dysfunction resulting in impaired cathepsin B activation in vivo. Int J Cancer 2013; 134:2478-88. [PMID: 24166050 DOI: 10.1002/ijc.28562] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Revised: 09/02/2013] [Accepted: 10/08/2013] [Indexed: 01/08/2023]
Abstract
The myxobacterial agent archazolid inhibits the vacuolar proton pump V-ATPase. V-ATPases are ubiquitously expressed ATP-dependent proton pumps, which are known to regulate the pH in endomembrane systems and thus play a crucial role in endo- and exocytotic processes of the cell. As cancer cells depend on a highly active secretion of proteolytic proteins in order to invade tissue and form metastases, inhibition of V-ATPase is proposed to affect the secretion profile of cancer cells and thus potentially abrogate their metastatic properties. Archazolid is a novel V-ATPase inhibitor. Here, we show that the secretion pattern of archazolid treated cancer cells includes various prometastatic lysosomal proteins like cathepsin A, B, C, D and Z. In particular, archazolid induced the secretion of the proforms of cathepsin B and D. Archazolid treatment abrogates the cathepsin B maturation process leading to reduced intracellular mature cathepsin B protein abundance and finally decreased cathepsin B activity, by inhibiting mannose-6-phoshate receptor-dependent trafficking. Importantly, in vivo reduced cathepsin B protein as well as a decreased proteolytic cathepsin B activity was detected in tumor tissue of archazolid-treated mice. Our results show that inhibition of V-ATPase by archazolid reduces the activity of prometastatic proteases like cathepsin B in vitro and in vivo.
Collapse
Affiliation(s)
- Rebekka Kubisch
- Pharmaceutical Biotechnology Department of Pharmacy, Ludwig Maximilians University, Munich, Germany
| | | | | | | | | | | | | | | |
Collapse
|
32
|
Abstract
Polyketides are a very diverse family of natural products with an extremely broad range of biological activities and pharmacological properties, including antiproliferative, antibiotic, antifungal, or antiplasmodial activities, and in many cases specific targets are addressed at the molecular level. Their structures are characterized by diverse assemblies of methyl- and hydroxyl-bearing stereogenic centers enabling large numbers of stereochemical permutations, which are often embedded into macrolide rings. This complexity renders the stereochemical assignment and directed total synthesis challenging tasks. Within this review, we will detail practicable approaches for the stereochemical determination of diverse complex polyketides of myxobacterial origin by using computational and NMR methods in combination with novel procedures based on bioinformatics. Furthermore, we have developed efficient preparative strategies for the synthesis of these compounds, which have culminated in several first total syntheses. Key aspects of these various endeavors, which will also focus on the importance of conformational bias in complex polyketide analysis and synthesis, will be discussed within this review in the realm of the potent macrolide antibiotics etnangien and rhizopodin. Along these lines, we will also summarize novel methods for the rapid assembly of key structural elements of polyketides including a novel domino concept relying on a combination of a nucleophilic addition and a Tsuji–Trost reaction.
Collapse
Affiliation(s)
- Sebastian Essig
- 1Institut für Organische Chemie, Universität Heidelberg, INF 270, D-69120 Heidelberg, Germany
| | - Dirk Menche
- 2Kekulé-Institut für Organische Chemie und Biochemie der Universität Bonn, Gerhard-Domagk-Str. 1, D-53121 Bonn, Germany
| |
Collapse
|
33
|
Persch E, Basile T, Bockelmann S, Huss M, Wieczorek H, Carlomagno T, Menche D. Synthesis and biological evaluation of a water-soluble derivative of the potent V-ATPase inhibitor archazolid. Bioorg Med Chem Lett 2012; 22:7735-8. [DOI: 10.1016/j.bmcl.2012.09.081] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2012] [Revised: 09/19/2012] [Accepted: 09/22/2012] [Indexed: 10/27/2022]
|
34
|
von Schwarzenberg K, Wiedmann RM, Oak P, Schulz S, Zischka H, Wanner G, Efferth T, Trauner D, Vollmar AM. Mode of cell death induction by pharmacological vacuolar H+-ATPase (V-ATPase) inhibition. J Biol Chem 2012; 288:1385-96. [PMID: 23168408 DOI: 10.1074/jbc.m112.412007] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
The vacuolar H(+)-ATPase (V-ATPase), a multisubunit proton pump, has come into focus as an attractive target in cancer invasion. However, little is known about the role of V-ATPase in cell death, and especially the underlying mechanisms remain mostly unknown. We used the myxobacterial macrolide archazolid B, a potent inhibitor of the V-ATPase, as an experimental drug as well as a chemical tool to decipher V-ATPase-related cell death signaling. We found that archazolid induced apoptosis in highly invasive tumor cells at nanomolar concentrations which was executed by the mitochondrial pathway. Prior to apoptosis induction archazolid led to the activation of a cellular stress response including activation of the hypoxia-inducible factor-1α (HIF1α) and autophagy. Autophagy, which was demonstrated by degradation of p62 or fusion of autophagosomes with lysosomes, was induced at low concentrations of archazolid that not yet increase pH in lysosomes. HIF1α was induced due to energy stress shown by a decline of the ATP level and followed by a shutdown of energy-consuming processes. As silencing HIF1α increases apoptosis, the cellular stress response was suggested to be a survival mechanism. We conclude that archazolid leads to energy stress which activates adaptive mechanisms like autophagy mediated by HIF1α and finally leads to apoptosis. We propose V-ATPase as a promising drugable target in cancer therapy caught up at the interplay of apoptosis, autophagy, and cellular/metabolic stress.
Collapse
Affiliation(s)
- Karin von Schwarzenberg
- Department of Pharmacy, Pharmaceutical Biology, Ludwig-Maximilians-University, 81377 Munich, Germany.
| | | | | | | | | | | | | | | | | |
Collapse
|
35
|
Wiedmann RM, von Schwarzenberg K, Palamidessi A, Schreiner L, Kubisch R, Liebl J, Schempp C, Trauner D, Vereb G, Zahler S, Wagner E, Müller R, Scita G, Vollmar AM. The V-ATPase-inhibitor archazolid abrogates tumor metastasis via inhibition of endocytic activation of the Rho-GTPase Rac1. Cancer Res 2012; 72:5976-87. [PMID: 22986742 DOI: 10.1158/0008-5472.can-12-1772] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The abundance of the multimeric vacuolar ATP-dependent proton pump, V-ATPase, on the plasma membrane of tumor cells correlates with the invasiveness of the tumor cell, suggesting the involvement of V-ATPase in tumor metastasis. V-ATPase is hypothesized to create a proton efflux leading to an acidic pericellular microenvironment that promotes the activity of proinvasive proteases. An alternative, not yet explored possibility is that V-ATPase regulates the signaling machinery responsible for tumor cell migration. Here, we show that pharmacologic or genetic reduction of V-ATPase activity significantly reduces migration of invasive tumor cells in vitro. Importantly, the V-ATPase inhibitor archazolid abrogates tumor dissemination in a syngeneic mouse 4T1 breast tumor metastasis model. Pretreatment of cancer cells with archazolid impairs directional motility by preventing spatially restricted, leading edge localization of epidermal growth factor receptor (EGFR) as well as of phosphorylated Akt. Archazolid treatment or silencing of V-ATPase inhibited Rac1 activation, as well as Rac1-dependent dorsal and peripheral ruffles by inhibiting Rab5-mediated endocytotic/exocytotic trafficking of Rac1. The results indicate that archazolid effectively decreases metastatic dissemination of breast tumors by impairing the trafficking and spatially restricted activation of EGFR and Rho-GTPase Rac1, which are pivotal for directed movement of cells. Thus, our data reveals a novel mechanism underlying the role of V-ATPase in tumor dissemination.
Collapse
Affiliation(s)
- Romina M Wiedmann
- Department of Pharmacy, Pharmaceutical Biology, University of Munich, Munich, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Dreisigacker S, Latek D, Bockelmann S, Huss M, Wieczorek H, Filipek S, Gohlke H, Menche D, Carlomagno T. Understanding the Inhibitory Effect of Highly Potent and Selective Archazolides Binding to the Vacuolar ATPase. J Chem Inf Model 2012; 52:2265-72. [DOI: 10.1021/ci300242d] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sandra Dreisigacker
- Structural and Computational Biology Unit, EMBL, Mayerhofstrasse 1, D-69117 Heidelberg, Germany
- Institute of Organic Chemistry, Ruprecht-Karls University Heidelberg, Im Neuenheimer
Feld 270, D-69120 Heidelberg, Germany
| | - Dorota Latek
- Structural and Computational Biology Unit, EMBL, Mayerhofstrasse 1, D-69117 Heidelberg, Germany
| | - Svenja Bockelmann
- Department of Animal Physiology, Faculty of Biology and Chemistry, University of Osnabrück, Barbarastrasse 11, D-49069 Osnabrück, Germany
| | - Markus Huss
- Department of Animal Physiology, Faculty of Biology and Chemistry, University of Osnabrück, Barbarastrasse 11, D-49069 Osnabrück, Germany
| | - Helmut Wieczorek
- Department of Animal Physiology, Faculty of Biology and Chemistry, University of Osnabrück, Barbarastrasse 11, D-49069 Osnabrück, Germany
| | - Slawomir Filipek
- Faculty of Chemistry, University of Warsaw, Pasteura 1, 02-093 Warsaw, Poland
| | - Holger Gohlke
- Heinrich-Heine-University Düsseldorf,
Institute of Pharmaceutical and Medicinal Chemistry, Universitätsstrasse
1, D-40225 Düsseldorf, Germany
| | - Dirk Menche
- Institute of Organic Chemistry, Ruprecht-Karls University Heidelberg, Im Neuenheimer
Feld 270, D-69120 Heidelberg, Germany
| | - Teresa Carlomagno
- Structural and Computational Biology Unit, EMBL, Mayerhofstrasse 1, D-69117 Heidelberg, Germany
| |
Collapse
|
37
|
Osteresch C, Bender T, Grond S, von Zezschwitz P, Kunze B, Jansen R, Huss M, Wieczorek H. The binding site of the V-ATPase inhibitor apicularen is in the vicinity of those for bafilomycin and archazolid. J Biol Chem 2012; 287:31866-76. [PMID: 22815478 DOI: 10.1074/jbc.m112.372169] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The investigation of V-ATPases as potential therapeutic drug targets and hence of their specific inhibitors is a promising approach in osteoporosis and cancer treatment because the occurrence of these diseases is interrelated to the function of the V-ATPase. Apicularen belongs to the novel inhibitor family of the benzolactone enamides, which are highly potent but feature the unique characteristic of not inhibiting V-ATPases from fungal sources. In this study we specify, for the first time, the binding site of apicularen within the membrane spanning V(O) complex. By photoaffinity labeling using derivatives of apicularen and of the plecomacrolides bafilomycin and concanamycin, each coupled to (14)C-labeled 4-(3-trifluoromethyldiazirin-3-yl)benzoic acid, we verified that apicularen binds at the interface of the V(O) subunits a and c. The binding site is in the vicinity to those of the plecomacrolides and of the archazolids, a third family of V-ATPase inhibitors. Expression of subunit c homologues from Homo sapiens and Manduca sexta, both species sensitive to benzolactone enamides, in a Saccharomyces cerevisiae strain lacking the corresponding intrinsic gene did not transfer this sensitivity to yeast. Therefore, the binding site of benzolactone enamides cannot be formed exclusively by subunit c. Apparently, subunit a substantially contributes to the binding of the benzolactone enamides.
Collapse
Affiliation(s)
- Christin Osteresch
- Fachbereich Biologie/Chemie, Abteilung Tierphysiologie, Universität Osnabrück, Barbarastrasse 11, 49069 Osnabrück, German
| | | | | | | | | | | | | | | |
Collapse
|
38
|
Chan CY, Prudom C, Raines SM, Charkhzarrin S, Melman SD, De Haro LP, Allen C, Lee SA, Sklar LA, Parra KJ. Inhibitors of V-ATPase proton transport reveal uncoupling functions of tether linking cytosolic and membrane domains of V0 subunit a (Vph1p). J Biol Chem 2012; 287:10236-10250. [PMID: 22215674 DOI: 10.1074/jbc.m111.321133] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
Vacuolar ATPases (V-ATPases) are important for many cellular processes, as they regulate pH by pumping cytosolic protons into intracellular organelles. The cytoplasm is acidified when V-ATPase is inhibited; thus we conducted a high-throughput screen of a chemical library to search for compounds that acidify the yeast cytosol in vivo using pHluorin-based flow cytometry. Two inhibitors, alexidine dihydrochloride (EC(50) = 39 μM) and thonzonium bromide (EC(50) = 69 μM), prevented ATP-dependent proton transport in purified vacuolar membranes. They acidified the yeast cytosol and caused pH-sensitive growth defects typical of V-ATPase mutants (vma phenotype). At concentrations greater than 10 μM the inhibitors were cytotoxic, even at the permissive pH (pH 5.0). Membrane fractions treated with alexidine dihydrochloride and thonzonium bromide fully retained concanamycin A-sensitive ATPase activity despite the fact that proton translocation was inhibited by 80-90%, indicating that V-ATPases were uncoupled. Mutant V-ATPase membranes lacking residues 362-407 of the tether of Vph1p subunit a of V(0) were resistant to thonzonium bromide but not to alexidine dihydrochloride, suggesting that this conserved sequence confers uncoupling potential to V(1)V(0) complexes and that alexidine dihydrochloride uncouples the enzyme by a different mechanism. The inhibitors also uncoupled the Candida albicans enzyme and prevented cell growth, showing further specificity for V-ATPases. Thus, a new class of V-ATPase inhibitors (uncouplers), which are not simply ionophores, provided new insights into the enzyme mechanism and original evidence supporting the hypothesis that V-ATPases may not be optimally coupled in vivo. The consequences of uncoupling V-ATPases in vivo as potential drug targets are discussed.
Collapse
Affiliation(s)
- Chun-Yuan Chan
- Department of Biochemistry and Molecular Biology, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131
| | - Catherine Prudom
- Center for Molecular Discovery, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131
| | - Summer M Raines
- Department of Biochemistry and Molecular Biology, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131
| | - Sahba Charkhzarrin
- Department of Biochemistry and Molecular Biology, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131
| | - Sandra D Melman
- Department of Biochemistry and Molecular Biology, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131
| | - Leyma P De Haro
- Department of Biochemistry and Molecular Biology, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131
| | - Chris Allen
- Center for Molecular Discovery, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131
| | - Samuel A Lee
- Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131
| | - Larry A Sklar
- Center for Molecular Discovery, School of Medicine, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131; Department of Pathology and Cancer Center, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131
| | - Karlett J Parra
- Department of Biochemistry and Molecular Biology, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131.
| |
Collapse
|
39
|
van der Poel S, Wolthoorn J, van den Heuvel D, Egmond M, Groux-Degroote S, Neumann S, Gerritsen H, van Meer G, Sprong H. Hyperacidification of Trans-Golgi Network and Endo/Lysosomes in Melanocytes by Glucosylceramide-Dependent V-ATPase Activity. Traffic 2011; 12:1634-47. [DOI: 10.1111/j.1600-0854.2011.01263.x] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
40
|
Huss M, Vitavska O, Albertmelcher A, Bockelmann S, Nardmann C, Tabke K, Tiburcy F, Wieczorek H. Vacuolar H(+)-ATPases: intra- and intermolecular interactions. Eur J Cell Biol 2011; 90:688-95. [PMID: 21640428 DOI: 10.1016/j.ejcb.2011.04.009] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
V-ATPases in eukaryotes are heteromultimeric, H(+)-transporting proteins. They are localized in a multitude of different membranes and energize many different transport processes. Unique features of V-ATPases are, on the one hand, their ability to regulate enzymatic and ion transporting activity by the reversible dissociation of the catalytic V(1) complex from the membrane bound proton translocating V(0) complex and, on the other hand, their high sensitivity to specific macrolides such as bafilomycin and concanamycin from streptomycetes or archazolid and apicularen from myxomycetes. Both features require distinct intramolecular as well as intermolecular interactions. Here we will summarize our own results together with newer developments in both of these research areas.
Collapse
Affiliation(s)
- Markus Huss
- University of Osnabrück, Faculty of Biology and Chemistry, Department of Animal Physiology, Barbarastrasse 11, 49076 Osnabrück, Germany.
| | | | | | | | | | | | | | | |
Collapse
|
41
|
Horstmann N, Essig S, Bockelmann S, Wieczorek H, Huss M, Sasse F, Menche D. Archazolid A-15-O-β-D-glucopyranoside and iso-archazolid B: potent V-ATPase inhibitory polyketides from the myxobacteria Cystobacter violaceus and Archangium gephyra. JOURNAL OF NATURAL PRODUCTS 2011; 74:1100-1105. [PMID: 21513292 DOI: 10.1021/np200036v] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Two structurally novel analogues of the macrolides archazolids A and B, archazolid A-15-O-β-D-glucopyranoside (archazolid E, 5) and iso-archazolid B (archazolid F, 6), were isolated from the myxobacterium Cystobacter violaceus and Archangium gephyra, respectively. Macrolactone 5 represents the first 15-O-glycoside of the archazolids. iso-Archazolid B (6) incorporates a C-3 alkene and presents the first constitutional isomer reported for this natural product class. The structures of these polyketides were determined by spectroscopic analysis, in particular by HMBC, HMQC, and ROESY NMR investigations and by chemical degradation. iso-Archazolid B (6) demonstrated extremely high antiproliferative and V-ATPase inhibitory effects, with IC(50) values in the picomolar range, while only moderate activity was observed for glycoside 5. iso-Archazolid B presents the most potent archazolid known.
Collapse
Affiliation(s)
- Nicole Horstmann
- Institut für Organische Chemie, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 270, D-69120 Heidelberg, Germany
| | | | | | | | | | | | | |
Collapse
|
42
|
Tran AB, Melly GC, Doucette R, Ashcraft B, Sebren LJ, Havko N, Young JC, O'Neil GW. Synthesis and activity of the archazolid western hemisphere. Org Biomol Chem 2011; 9:7671-4. [DOI: 10.1039/c1ob06446k] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|