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Agrawal SK, Majhi PK, Goodfellow AS, Tak RK, Cordes DB, McKay AP, Kasten K, Bühl M, Smith AD. Synthesis of Tetra-Substituted 3-Hydroxyphthalide Esters by Isothiourea-Catalysed Acylative Dynamic Kinetic Resolution. Angew Chem Int Ed Engl 2024; 63:e202402909. [PMID: 38713305 DOI: 10.1002/anie.202402909] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 05/03/2024] [Accepted: 05/06/2024] [Indexed: 05/08/2024]
Abstract
A general and highly enantioselective method for the preparation of tetra-substituted 3-hydroxyphthalide esters via isothiourea-catalysed acylative dynamic kinetic resolution (DKR) is reported. Using (2S,3R)-HyperBTM (5 mol %) as the catalyst, the scope and limitations of this methodology have been extensively probed, with high enantioselectivity and good to excellent yields observed (>40 examples, up to 99 %, 99 : 1 er). Substitution of the aromatic core within the 3-hydroxyphthalide skeleton, as well as aliphatic and aromatic substitution at C(3), is readily tolerated. A diverse range of anhydrides, including those from bioactive and pharmaceutically relevant acids, can also be used. The high enantioselectivity observed in this DKR process has been probed computationally, with a key substrate heteroatom donor O⋅⋅⋅acyl-isothiouronium interaction identified through DFT analysis as necessary for enantiodiscrimination.
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Affiliation(s)
- Shubham K Agrawal
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - Pankaj K Majhi
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - Alister S Goodfellow
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - Raj K Tak
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - David B Cordes
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - Aidan P McKay
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - Kevin Kasten
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - Michael Bühl
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews, St Andrews, Fife, KY16 9ST, UK
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2
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Stanková J, Jurášek M, Hajdúch M, Džubák P. Terpenes and Terpenoids Conjugated with BODIPYs: An Overview of Biological and Chemical Properties. JOURNAL OF NATURAL PRODUCTS 2024; 87:1306-1319. [PMID: 38482846 PMCID: PMC11061839 DOI: 10.1021/acs.jnatprod.3c00961] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 02/28/2024] [Accepted: 03/04/2024] [Indexed: 05/03/2024]
Abstract
Advancements in small-molecule research have created the need for sensitive techniques to accurately study biological processes in living systems. Fluorescent-labeled probes have become indispensable tools, particularly those that use boron-dipyrromethene (BODIPY) dyes. Terpenes and terpenoids are organic compounds found in nature that offer diverse biological activities, and BODIPY-based probes play a crucial role in studying these compounds. Monoterpene-BODIPY conjugates have exhibited potential for staining bacterial and fungal cells. Sesquiterpene-BODIPY derivatives have been used to study sarcoplasmic/endoplasmic reticulum calcium ATPase (SERCA), indicating their potential for drug development. Owing to their unique properties, diterpenes have been investigated using BODIPY conjugates to evaluate their mechanisms of action. Triterpene-BODIPY conjugates have been synthesized for biological studies, with different spacers affecting their cytotoxicity. Fluorescent probes, inspired by terpenoid-containing vitamins, have also been developed. Derivatives of tocopherol, coenzyme Q10, and vitamin K1 can provide insights into their oxidation-reduction abilities. All these probes have diverse applications, including the study of cell membranes to investigate immune responses and antioxidant properties. Further research in this field can help better understand and use terpenes and terpenoids in various biological contexts.
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Affiliation(s)
- Jarmila Stanková
- Institute
of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, 77900 Olomouc, Czech Republic
| | - Michal Jurášek
- Department
of Chemistry of Natural Compounds, University
of Chemistry and Technology Prague, 16628 Prague, Czech Republic
| | - Marián Hajdúch
- Institute
of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, 77900 Olomouc, Czech Republic
- Laboratory
of Experimental Medicine, Institute of Molecular and Translational
Medicine, University Hospital Olomouc, 77900 Olomouc, Czech Republic
| | - Petr Džubák
- Institute
of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacký University, 77900 Olomouc, Czech Republic
- Laboratory
of Experimental Medicine, Institute of Molecular and Translational
Medicine, University Hospital Olomouc, 77900 Olomouc, Czech Republic
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3
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Tapia-Monsalves C, Olesen MA, Villavicencio-Tejo F, Quintanilla RA. Cyclosporine A (CsA) prevents synaptic impairment caused by truncated tau by caspase-3. Mol Cell Neurosci 2023; 125:103861. [PMID: 37182572 DOI: 10.1016/j.mcn.2023.103861] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2023] [Revised: 04/28/2023] [Accepted: 05/08/2023] [Indexed: 05/16/2023] Open
Abstract
During Alzheimer's (AD), tau protein suffers from abnormal post-translational modifications, including cleaving by caspase-3. These tau forms affect synaptic plasticity contributing to the cognitive decline observed in the early stages of AD. In addition, caspase-3 cleaved tau (TauC3) impairs mitochondrial dynamics and organelles transport, which are both relevant processes for synapse. We recently showed that the absence of tau expression reverts age-associated cognitive and mitochondrial failure by blocking the mitochondrial permeability transition pore (mPTP). mPTP is a mitochondrial complex involved in calcium regulation and apoptosis. Therefore, we studied the effects of TauC3 against the dendritic spine and synaptic vesicle formation and the possible role of mPTP in these alterations. We used mature hippocampal mice neurons to express a reporter protein (GFP, mCherry), coupled to full-length human tau protein (GFP-T4, mCherry-T4), and coupled to human tau protein cleaved at D421 by caspase-3 (GFP-T4C3, mCherry-T4C3) and synaptic elements were evaluated. Treatment with cyclosporine A (CsA), an immunosuppressive drug with inhibitory activity on mPTP, prevented ROS increase and mitochondrial depolarization induced by TauC3 in hippocampal neurons. These results were corroborated with immortalized cortical neurons in which ROS increase and ATP loss induced by this tau form were prevented by CsA. Interestingly, TauC3 expression significantly reduced dendritic spine density (filopodia type) and synaptic vesicle number in hippocampal neurons. Also, neurons transfected with TauC3 showed a significant accumulation of synaptophysin protein in their soma. More importantly, all these synaptic alterations were prevented by CsA, suggesting an mPTP role in these negative changes derived from TauC3 expression.
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Affiliation(s)
- Carola Tapia-Monsalves
- Laboratory of Neurodegenerative Diseases, Facultad de Ciencias de la Salud, Instituto de Ciencias Biomedicas, Universidad Autonoma de Chile, Santiago, Chile
| | - Margrethe A Olesen
- Laboratory of Neurodegenerative Diseases, Facultad de Ciencias de la Salud, Instituto de Ciencias Biomedicas, Universidad Autonoma de Chile, Santiago, Chile
| | - Francisca Villavicencio-Tejo
- Laboratory of Neurodegenerative Diseases, Facultad de Ciencias de la Salud, Instituto de Ciencias Biomedicas, Universidad Autonoma de Chile, Santiago, Chile
| | - Rodrigo A Quintanilla
- Laboratory of Neurodegenerative Diseases, Facultad de Ciencias de la Salud, Instituto de Ciencias Biomedicas, Universidad Autonoma de Chile, Santiago, Chile.
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4
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Mazumder K, Aktar A, Roy P, Biswas B, Hossain ME, Sarkar KK, Bachar SC, Ahmed F, Monjur-Al-Hossain ASM, Fukase K. A Review on Mechanistic Insight of Plant Derived Anticancer Bioactive Phytocompounds and Their Structure Activity Relationship. Molecules 2022; 27:3036. [PMID: 35566385 PMCID: PMC9102595 DOI: 10.3390/molecules27093036] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2022] [Revised: 05/04/2022] [Accepted: 05/05/2022] [Indexed: 11/16/2022] Open
Abstract
Cancer is a disorder that rigorously affects the human population worldwide. There is a steady demand for new remedies to both treat and prevent this life-threatening sickness due to toxicities, drug resistance and therapeutic failures in current conventional therapies. Researchers around the world are drawing their attention towards compounds of natural origin. For decades, human beings have been using the flora of the world as a source of cancer chemotherapeutic agents. Currently, clinically approved anticancer compounds are vincristine, vinblastine, taxanes, and podophyllotoxin, all of which come from natural sources. With the triumph of these compounds that have been developed into staple drug products for most cancer therapies, new technologies are now appearing to search for novel biomolecules with anticancer activities. Ellipticine, camptothecin, combretastatin, curcumin, homoharringtonine and others are plant derived bioactive phytocompounds with potential anticancer properties. Researchers have improved the field further through the use of advanced analytical chemistry and computational tools of analysis. The investigation of new strategies for administration such as nanotechnology may enable the development of the phytocompounds as drug products. These technologies have enhanced the anticancer potential of plant-derived drugs with the aim of site-directed drug delivery, enhanced bioavailability, and reduced toxicity. This review discusses mechanistic insights into anticancer compounds of natural origins and their structural activity relationships that make them targets for anticancer treatments.
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Affiliation(s)
- Kishor Mazumder
- Department of Pharmacy, Jashore University of Science and Technology, Jashore 7408, Bangladesh; (A.A.); (P.R.); (B.B.); (M.E.H.); (K.K.S.)
- School of Optometry and Vision Science, UNSW Medicine, University of New South Wales (UNSW), Sydney, NSW 2052, Australia
| | - Asma Aktar
- Department of Pharmacy, Jashore University of Science and Technology, Jashore 7408, Bangladesh; (A.A.); (P.R.); (B.B.); (M.E.H.); (K.K.S.)
| | - Priyanka Roy
- Department of Pharmacy, Jashore University of Science and Technology, Jashore 7408, Bangladesh; (A.A.); (P.R.); (B.B.); (M.E.H.); (K.K.S.)
| | - Biswajit Biswas
- Department of Pharmacy, Jashore University of Science and Technology, Jashore 7408, Bangladesh; (A.A.); (P.R.); (B.B.); (M.E.H.); (K.K.S.)
| | - Md. Emran Hossain
- Department of Pharmacy, Jashore University of Science and Technology, Jashore 7408, Bangladesh; (A.A.); (P.R.); (B.B.); (M.E.H.); (K.K.S.)
| | - Kishore Kumar Sarkar
- Department of Pharmacy, Jashore University of Science and Technology, Jashore 7408, Bangladesh; (A.A.); (P.R.); (B.B.); (M.E.H.); (K.K.S.)
| | - Sitesh Chandra Bachar
- Department of Pharmacy, Faculty of Pharmacy, University of Dhaka, Dhaka 1207, Bangladesh; (S.C.B.); (F.A.)
| | - Firoj Ahmed
- Department of Pharmacy, Faculty of Pharmacy, University of Dhaka, Dhaka 1207, Bangladesh; (S.C.B.); (F.A.)
| | - A. S. M. Monjur-Al-Hossain
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Dhaka, Dhaka 1207, Bangladesh;
| | - Koichi Fukase
- Department of Chemistry, Graduate School of Science, Osaka University, 1-1 Machikaneyama, Toyonaka, Osaka 560-0043, Japan
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5
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Christensen SB, Simonsen HT, Engedal N, Nissen P, Møller JV, Denmeade SR, Isaacs JT. From Plant to Patient: Thapsigargin, a Tool for Understanding Natural Product Chemistry, Total Syntheses, Biosynthesis, Taxonomy, ATPases, Cell Death, and Drug Development. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2021; 115:59-114. [PMID: 33797641 DOI: 10.1007/978-3-030-64853-4_2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Thapsigargin, the first representative of the hexaoxygenated guaianolides, was isolated 40 years ago in order to understand the skin-irritant principles of the resin of the umbelliferous plant Thapsia garganica. The pronounced cytotoxicity of thapsigargin is caused by highly selective inhibition of the intracellular sarco-endoplasmic Ca2+-ATPase (SERCA) situated on the membrane of the endo- or sarcoplasmic reticulum. Thapsigargin is selective to the SERCA pump and to a minor extent the secretory pathway Ca2+/Mn2+ ATPase (SPCA) pump. Thapsigargin has become a tool for investigation of the importance of SERCA in intracellular calcium homeostasis. In addition, complex formation of thapsigargin with SERCA has enabled crystallization and structure determination of calcium-free states by X-ray crystallography. These results led to descriptions of the mechanism of action and kinetic properties of SERCA and other ATPases. Inhibition of SERCA depletes Ca2+ from the sarco- and endoplasmic reticulum provoking the unfolded protein response, and thereby has enabled new studies on the mechanism of cell death. Development of protocols for selective transformation of thapsigargin disclosed the chemistry and facilitated total synthesis of the molecule. Conversion of trilobolide into thapsigargin offered an economically feasible sustainable source of thapsigargin, which enables a future drug production. Principles for prodrug development were used by conjugating a payload derived from thapsigargin with a hydrophilic peptide selectively cleaved by proteases in the tumor. Mipsagargin was developed in order to obtain a drug for treatment of cancer diseases characterized by the presence of prostate specific membrane antigen (PSMA) in the neovascular tissue of the tumors. Even though mipsagargin showed interesting clinical effects the results did not encourage funding and consequently the attempt to register the drug has been abandoned. In spite of this disappointing fact, the research performed to develop the drug has resulted in important scientific discoveries concerning the chemistry, biosynthesis and biochemistry of sesquiterpene lactones, the mechanism of action of ATPases including SERCA, mechanisms for cell death caused by the unfolded protein response, and the use of prodrugs for cancer-targeting cytotoxins. The presence of toxins in only some species belonging to Thapsia also led to a major revision of the taxonomy of the genus.
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Affiliation(s)
- Søren Brøgger Christensen
- Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, 2100, Copenhagen Ø, Denmark.
| | - Henrik Toft Simonsen
- Department of Biotechnology and Biomedicine, Technical University of Denmark, Søltofts Plads, Bld 223, 2800, Kgs. Lyngby, Denmark
| | - Nikolai Engedal
- Department of Tumor Biology, Institute for Cancer Research, University Hospital, Montebello, 0379, Oslo, Norway
| | - Poul Nissen
- Department of Molecular Biology and Genetics, Danish Research Institute of Translational Neuroscience - DANDRITE, Nordic EMBL Partnership for Molecular Medicine, Aarhus University, Gustav Wieds Vej 10C, 8000, Aarhus C, Denmark
| | - Jesper Vuust Møller
- Department of Biomedicine, Aarhus University, Ole Worms Allé 3, Bld 1182, Room 114, 8000, Aarhus C, Denmark
| | - Samuel R Denmeade
- Department of Oncology, Prostate Cancer Program, The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Maryland, The Johns Hopkins University School of Medicine, Baltimore, The Bunting-Blaustein Cancer Research Building, 1650 Orleans Street, Baltimore, MD, 21231, USA
| | - John T Isaacs
- Department of Oncology, Prostate Cancer Program, The Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins Maryland, The Johns Hopkins University School of Medicine, Baltimore, The Bunting-Blaustein Cancer Research Building, 1650 Orleans Street, Baltimore, MD, 21231, USA
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6
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Thapsigargin-From Traditional Medicine to Anticancer Drug. Int J Mol Sci 2020; 22:ijms22010004. [PMID: 33374919 PMCID: PMC7792614 DOI: 10.3390/ijms22010004] [Citation(s) in RCA: 58] [Impact Index Per Article: 14.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Revised: 12/16/2020] [Accepted: 12/18/2020] [Indexed: 02/06/2023] Open
Abstract
A sesquiterpene lactone, thapsigargin, is a phytochemical found in the roots and fruits of Mediterranean plants from Thapsia L. species that have been used for centuries in folk medicine to treat rheumatic pain, lung diseases, and female infertility. More recently thapsigargin was found to be a potent cytotoxin that induces apoptosis by inhibiting the sarcoplasmic/endoplasmic reticulum Ca2+ ATPase (SERCA) pump, which is necessary for cellular viability. This biological activity encouraged studies on the use of thapsigargin as a novel antineoplastic agent, which were, however, hampered due to high toxicity of this compound to normal cells. In this review, we summarized the recent knowledge on the biological activity and molecular mechanisms of thapsigargin action and advances in the synthesis of less-toxic thapsigargin derivatives that are being developed as novel anticancer drugs.
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7
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Evolution of Pauson-Khand Reaction: Strategic Applications in Total Syntheses of Architecturally Complex Natural Products (2016–2020). Catalysts 2020. [DOI: 10.3390/catal10101199] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Metal-mediated cyclizations are important transformations in a natural product total synthesis. The Pauson-Khand reaction, particularly powerful for establishing cyclopentenone-containing structures, is distinguished as one of the most attractive annulation processes routinely employed in synthesis campaigns. This review covers Co, Rh, and Pd catalyzed Pauson-Khand reaction and summarizes its strategic applications in total syntheses of structurally complex natural products in the last five years. Additionally, the hetero-Pauson-Khand reaction in the synthesis of heterocycles will also be discussed. Focusing on the panorama of organic synthesis, this review highlights the strategically developed Pauson-Khand reaction in fulfilling total synthetic tasks and its synthetic attractiveness is aimed to be illustrated.
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8
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Applications of Sesquiterpene Lactones: A Review of Some Potential Success Cases. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10093001] [Citation(s) in RCA: 60] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Sesquiterpene lactones, a vast range of terpenoids isolated from Asteraceae species, exhibit a broad spectrum of biological effects and several of them are already commercially available, such as artemisinin. Here the most recent and impactful results of in vivo, preclinical and clinical studies involving a selection of ten sesquiterpene lactones (alantolactone, arglabin, costunolide, cynaropicrin, helenalin, inuviscolide, lactucin, parthenolide, thapsigargin and tomentosin) are presented and discussed, along with some of their derivatives. In the authors’ opinion, these compounds have been neglected compared to others, although they could be of great use in developing important new pharmaceutical products. The selected sesquiterpenes show promising anticancer and anti-inflammatory effects, acting on various targets. Moreover, they exhibit antifungal, anxiolytic, analgesic, and antitrypanosomal activities. Several studies discussed here clearly show the potential that some of them have in combination therapy, as sensitizing agents to facilitate and enhance the action of drugs in clinical use. The derivatives show greater pharmacological value since they have better pharmacokinetics, stability, potency, and/or selectivity. All these natural terpenoids and their derivatives exhibit properties that invite further research by the scientific community.
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9
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Sanogo Y, Othman RB, Dhambri S, Selkti M, Jeuken A, Prunet J, Férézou JP, Ardisson J, Lannou MI, Sorin G. Ti(II) and Rh(I) Complexes as Reagents toward a Thapsigargin Core. J Org Chem 2019; 84:5821-5830. [PMID: 30964681 DOI: 10.1021/acs.joc.8b03249] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
A novel approach toward the [5-7]fused bicyclic core of thapsigargin, a subnanomolar inhibitor of the endo/sarcoplasmic calcium ATPase (SERCA), is presented. The synthetic route includes an original Ti(II)-mediated hydroxy-directed reductive coupling of an enantiomerically enriched propargylic alcohol and an intramolecular Rh(I)-catalyzed cyclocarbonylation reaction as key steps. Interestingly, through the first experiments of titanocene-mediated reductive cyclization of a 1,8-enyne, a seven-membered cycle was isolated as a unique product with a total diastereoselectivity.
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Affiliation(s)
- Youssouf Sanogo
- Unité CNRS UMR 8638 , Université Paris Descartes, Faculté de Pharmacie , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , Paris Cedex 06 75270 , France
| | - Raja Ben Othman
- Unité CNRS UMR 8638 , Université Paris Descartes, Faculté de Pharmacie , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , Paris Cedex 06 75270 , France
| | - Sabrina Dhambri
- Unité CNRS UMR 8638 , Université Paris Descartes, Faculté de Pharmacie , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , Paris Cedex 06 75270 , France
| | - Mohamed Selkti
- Unité CNRS UMR 8015 , Université Paris Descartes, Faculté de Pharmacie , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , Paris Cedex 06 75270 , France
| | - Alan Jeuken
- WestCHEM, School of Chemistry , University of Glasgow , Joseph Black Building, University Avenue , Glasgow G12 8QQ , United Kingdom
| | - Joëlle Prunet
- WestCHEM, School of Chemistry , University of Glasgow , Joseph Black Building, University Avenue , Glasgow G12 8QQ , United Kingdom
| | - Jean-Pierre Férézou
- Méthodologie, Synthèse et Molécules Thérapeutiques, ICMMO (CNRS UMR 8182) , Université Paris-Sud, Université Paris-Saclay , Bâtiment 410 , Orsay F-91405 , France
| | - Janick Ardisson
- Unité CNRS UMR 8638 , Université Paris Descartes, Faculté de Pharmacie , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , Paris Cedex 06 75270 , France
| | - Marie-Isabelle Lannou
- Unité CNRS UMR 8638 , Université Paris Descartes, Faculté de Pharmacie , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , Paris Cedex 06 75270 , France
| | - Geoffroy Sorin
- Unité CNRS UMR 8638 , Université Paris Descartes, Faculté de Pharmacie , Sorbonne Paris Cité, 4 Avenue de l'Observatoire , Paris Cedex 06 75270 , France
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10
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Chen J, De Raeymaecker J, Hovgaard JB, Smaardijk S, Vandecaetsbeek I, Wuytack F, Møller JV, Eggermont J, De Maeyer M, Christensen SB, Vangheluwe P. Structure/activity relationship of thapsigargin inhibition on the purified Golgi/secretory pathway Ca 2+/Mn 2+-transport ATPase (SPCA1a). J Biol Chem 2017; 292:6938-6951. [PMID: 28264934 DOI: 10.1074/jbc.m117.778431] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2017] [Revised: 03/02/2017] [Indexed: 12/11/2022] Open
Abstract
The Golgi/secretory pathway Ca2+/Mn2+-transport ATPase (SPCA1a) is implicated in breast cancer and Hailey-Hailey disease. Here, we purified recombinant human SPCA1a from Saccharomyces cerevisiae and measured Ca2+-dependent ATPase activity following reconstitution in proteoliposomes. The purified SPCA1a displays a higher apparent Ca2+ affinity and a lower maximal turnover rate than the purified sarco(endo)plasmic reticulum Ca2+-ATPase (SERCA1a). The lipids cholesteryl hemisuccinate, linoleamide/oleamide, and phosphatidylethanolamine inhibit and phosphatidic acid and sphingomyelin enhance SPCA1a activity. Moreover, SPCA1a is blocked by micromolar concentrations of the commonly used SERCA1a inhibitors thapsigargin (Tg), cyclopiazonic acid, and 2,5-di-tert-butylhydroquinone. Because tissue-specific targeting of SERCA2b by Tg analogues is considered for prostate cancer therapy, the inhibition of SPCA1a by Tg might represent an off-target risk. We assessed the structure-activity relationship (SAR) of Tg for SPCA1a by in silico modeling, site-directed mutagenesis, and measuring the potency of a series of Tg analogues. These indicate that Tg and the analogues are bound via the Tg scaffold but with lower affinity to the same homologous cavity as on the membrane surface of SERCA1a. The lower Tg affinity may depend on a more flexible binding cavity in SPCA1a, with low contributions of the Tg O-3, O-8, and O-10 chains to the binding energy. Conversely, the protein interaction of the Tg O-2 side chain with SPCA1a appears comparable with that of SERCA1a. These differences define a SAR of Tg for SPCA1a distinct from that of SERCA1a, indicating that Tg analogues with a higher specificity for SPCA1a can probably be developed.
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Affiliation(s)
- Jialin Chen
- From the Laboratory of Cellular Transport Systems, Department of Cellular and Molecular Medicine, and
| | - Joren De Raeymaecker
- Biochemistry, Molecular and Structural Biology Section, Department of Chemistry, KU Leuven, 3000 Leuven, Belgium
| | - Jannik Brøndsted Hovgaard
- the Department of Drug Design and Pharmacology, University of Copenhagen, DK-2100 Copenhagen, Denmark, and
| | - Susanne Smaardijk
- From the Laboratory of Cellular Transport Systems, Department of Cellular and Molecular Medicine, and
| | - Ilse Vandecaetsbeek
- From the Laboratory of Cellular Transport Systems, Department of Cellular and Molecular Medicine, and
| | - Frank Wuytack
- From the Laboratory of Cellular Transport Systems, Department of Cellular and Molecular Medicine, and
| | | | - Jan Eggermont
- From the Laboratory of Cellular Transport Systems, Department of Cellular and Molecular Medicine, and
| | - Marc De Maeyer
- Biochemistry, Molecular and Structural Biology Section, Department of Chemistry, KU Leuven, 3000 Leuven, Belgium
| | - Søren Brøgger Christensen
- the Department of Drug Design and Pharmacology, University of Copenhagen, DK-2100 Copenhagen, Denmark, and
| | - Peter Vangheluwe
- From the Laboratory of Cellular Transport Systems, Department of Cellular and Molecular Medicine, and
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11
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Jurášek M, Džubák P, Rimpelová S, Sedlák D, Konečný P, Frydrych I, Gurská S, Hajdúch M, Bogdanová K, Kolář M, Müller T, Kmoníčková E, Ruml T, Harmatha J, Drašar PB. Trilobolide-steroid hybrids: Synthesis, cytotoxic and antimycobacterial activity. Steroids 2017; 117:97-104. [PMID: 27543674 DOI: 10.1016/j.steroids.2016.08.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2016] [Revised: 06/22/2016] [Accepted: 08/08/2016] [Indexed: 11/29/2022]
Abstract
Sesquiterpene lactone trilobolide is a sarco/endoplasmic reticulum Ca2+-ATPase (SERCA) inhibitor, thus depleting the Ins(1,4,5)P3-sensitive intracellular calcium stores. Here, we describe a synthesis of a series of 6 trilobolide-steroids conjugates (estradiol, pregnene, dehydroepiandrosterone, and testosterone). We found that the newly synthesized Tb-based compounds possess different remarkable biological activities. Cancer cell cytotoxicity and preferential selectivity is represented in our study by a Tb-pregnene derivative. The most cytotoxic clickates of estradiol and pregnene were studied by FACS where impact on cell cycle and RNA synthesis was observed; live-cell microscopy revealed the impact on cell organelle morphology particularly endoplasmic reticulum, mitochondria and nucleus. Further, we have studied the estrogenic and androgenic properties of the clickate molecules using cell-based luciferase assays. Finally, antimycobacterial tests revealed that testosterone and estradiol derivatives potentiated the antimycobacterial activity up to IC50 of 10.6μM.
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Affiliation(s)
- Michal Jurášek
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology, CZ-166 28 Prague, Czech Republic
| | - Petr Džubák
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University and University Hospital in Olomouc, CZ-775 15 Olomouc, Czech Republic.
| | - Silvie Rimpelová
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology, CZ-166 28 Prague, Czech Republic
| | - David Sedlák
- CZ-OPENSCREEN: National Infrastructure for Chemical Biology, Institute of Molecular Genetics AS CR Prague, CZ-142 20 Prague, Czech Republic
| | - Petr Konečný
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University and University Hospital in Olomouc, CZ-775 15 Olomouc, Czech Republic
| | - Ivo Frydrych
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University and University Hospital in Olomouc, CZ-775 15 Olomouc, Czech Republic
| | - Soňa Gurská
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University and University Hospital in Olomouc, CZ-775 15 Olomouc, Czech Republic
| | - Marián Hajdúch
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University and University Hospital in Olomouc, CZ-775 15 Olomouc, Czech Republic
| | - Kateřina Bogdanová
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University and University Hospital in Olomouc, CZ-775 15 Olomouc, Czech Republic
| | - Milan Kolář
- Institute of Molecular and Translational Medicine, Faculty of Medicine and Dentistry, Palacky University and University Hospital in Olomouc, CZ-775 15 Olomouc, Czech Republic
| | - Tomáš Müller
- CZ-OPENSCREEN: National Infrastructure for Chemical Biology, Institute of Molecular Genetics AS CR Prague, CZ-142 20 Prague, Czech Republic
| | - Eva Kmoníčková
- Institute of Experimental Medicine, Department of Pharmacology AS CR, Prague, Czech Republic; Institute of Pharmacology and Toxicology and Biomedical Center, Faculty of Medicine in Pilsen, Charles University, Prague, Czech Republic
| | - Tomáš Ruml
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology, CZ-166 28 Prague, Czech Republic
| | - Juraj Harmatha
- Institute of Organic Chemistry and Biochemistry AS CR Prague, CZ-166 10 Prague, Czech Republic
| | - Pavel B Drašar
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology, CZ-166 28 Prague, Czech Republic.
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12
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Huml L, Jurášek M, Mikšátková P, Zimmermann T, Tomanová P, Buděšínský M, Rottnerová Z, Šimková M, Harmatha J, Kmoníčková E, Lapčík O, Drašar PB. Immunoassay for determination of trilobolide. Steroids 2017; 117:105-111. [PMID: 27600788 DOI: 10.1016/j.steroids.2016.08.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 08/10/2016] [Accepted: 08/30/2016] [Indexed: 11/27/2022]
Abstract
Trilobolide (Tb) is a pharmacologically interesting sesquiterpene lactone isolated from Laser trilobum (L.) Borkh. Structural relation to a sarco/endoplasmic reticulum Ca2+-ATPase inhibitor thapsigargin bring promising prospects for Tb to be used in the development of new anti-cancer drugs. As long as there are still unanswered questions regarding its investigation, a need for novel analytical tools emerge. Since immunoassays serve as one of powerful tools within the investigation of natural products, the development of indirect competitive enzyme-linked immunosorbent assay (ELISA) utilizing coating based on avidin-biotin technology is described. In our set-up of ELISA, newly synthesized biotinylated Tb served as immobilized competitor. Tb-carboxymethyloxime-bovine serum albumin (BSA) and Tb-succinoyl-BSA conjugates were used separately for immunization of rabbits. Two sets of polyclonal antibodies (RAbs) were obtained. Antibodies against Tb-succinoyl-BSA conjugate (RAb No. 206) were chosen as the best. Under optimized conditions, limit of detection and 50% intercept of our ELISA were 849pg/mL and 8.89ng/mL, respectively. The cross-reactivity (CR) was tested on 10 structurally related compounds and CR did not exceed 6.1%. The reproducibility of the system is expressed as intra- and inter-assay coefficients of variation (9.7% and 11.4%, respectively). Based on conducted experiments, we proposed the use of ELISA for quantification of Tb in complex biological matrices such as plant extracts. A method was applied to analyze three extracts obtained from different parts of L. trilobum. Data obtained were compared to those acquired by UHPLC-MS/MS. The concordance between the methods (103-87%) showed the ability of ELISA to quantify Tb.
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Affiliation(s)
- Lukáš Huml
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology [342], CZ-166 28 Prague, Czech Republic
| | - Michal Jurášek
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology [342], CZ-166 28 Prague, Czech Republic
| | - Petra Mikšátková
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology [342], CZ-166 28 Prague, Czech Republic
| | - Tomáš Zimmermann
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology [342], CZ-166 28 Prague, Czech Republic
| | - Pavla Tomanová
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology [342], CZ-166 28 Prague, Czech Republic
| | - Miloš Buděšínský
- Institute of Organic Chemistry and Biochemistry, CZ-166 10 Prague, Czech Republic
| | - Zdeňka Rottnerová
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology [342], CZ-166 28 Prague, Czech Republic
| | - Markéta Šimková
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology [342], CZ-166 28 Prague, Czech Republic
| | - Juraj Harmatha
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology [342], CZ-166 28 Prague, Czech Republic; Institute of Organic Chemistry and Biochemistry, CZ-166 10 Prague, Czech Republic
| | - Eva Kmoníčková
- Institute of Experimental Medicine, AS CR, v.v.i., CZ-142 20 Prague, Czech Republic; Charles University in Prague, Faculty of Medicine and Biomedical Center in Pilsen, CZ-301 66 Pilsen, Czech Republic
| | - Oldřich Lapčík
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology [342], CZ-166 28 Prague, Czech Republic.
| | - Pavel B Drašar
- University of Chemistry and Technology Prague, Faculty of Food and Biochemical Technology [342], CZ-166 28 Prague, Czech Republic.
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13
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14
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Autzen HE, Siuda I, Sonntag Y, Nissen P, Møller JV, Thøgersen L. Regulation of the Ca(2+)-ATPase by cholesterol: a specific or non-specific effect? Mol Membr Biol 2015; 32:75-87. [PMID: 26260074 DOI: 10.3109/09687688.2015.1073382] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Like other integral membrane proteins, the activity of the Sarco/Endoplasmic Reticulum Ca(2+)-ATPase (SERCA) is regulated by the membrane environment. Cholesterol is present in the endoplasmic reticulum membrane at low levels, and it has the potential to affect SERCA activity both through direct, specific interaction with the protein or through indirect interaction through changes of the overall membrane properties. There are experimental data arguing for both modes of action for a cholesterol-mediated regulation of SERCA. In the current study, coarse-grained molecular dynamics simulations are used to address how a mixed lipid-cholesterol membrane interacts with SERCA. Candidates for direct regulatory sites with specific cholesterol binding modes are extracted from the simulations. The binding pocket for thapsigargin, a nanomolar inhibitor of SERCA, has been suggested as a cholesterol binding site. However, the thapsigargin binding pocket displayed very little cholesterol occupation in the simulations. Neither did atomistic simulations of cholesterol in the thapsigargin binding pocket support any specific interaction. The current study points to a non-specific effect of cholesterol on SERCA activity, and offers an alternative interpretation of the experimental results used to argue for a specific effect.
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Affiliation(s)
- Henriette Elisabeth Autzen
- a Centre for Membrane Pumps in Cells and Disease (PUMPkin), Danish National Research Foundation , Aarhus , Denmark .,b Department of Molecular Biology and Genetics , Aarhus University , Aarhus , Denmark
| | - Iwona Siuda
- a Centre for Membrane Pumps in Cells and Disease (PUMPkin), Danish National Research Foundation , Aarhus , Denmark .,c Bioinformatics Research Centre (BiRC) , Aarhus , Denmark , and
| | - Yonathan Sonntag
- a Centre for Membrane Pumps in Cells and Disease (PUMPkin), Danish National Research Foundation , Aarhus , Denmark .,b Department of Molecular Biology and Genetics , Aarhus University , Aarhus , Denmark
| | - Poul Nissen
- a Centre for Membrane Pumps in Cells and Disease (PUMPkin), Danish National Research Foundation , Aarhus , Denmark .,b Department of Molecular Biology and Genetics , Aarhus University , Aarhus , Denmark
| | - Jesper Vuust Møller
- a Centre for Membrane Pumps in Cells and Disease (PUMPkin), Danish National Research Foundation , Aarhus , Denmark .,d Department of Biomedicine , Aarhus University , Aarhus , Denmark
| | - Lea Thøgersen
- a Centre for Membrane Pumps in Cells and Disease (PUMPkin), Danish National Research Foundation , Aarhus , Denmark .,c Bioinformatics Research Centre (BiRC) , Aarhus , Denmark , and
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15
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Doan NTQ, Crestey F, Olsen CE, Christensen SB. Chemo- and Regioselective Functionalization of Nortrilobolide: Application for Semisynthesis of the Natural Product 2-Acetoxytrilobolide. JOURNAL OF NATURAL PRODUCTS 2015; 78:1406-1414. [PMID: 26078214 DOI: 10.1021/acs.jnatprod.5b00333] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The difference in reactivity of the hexaoxygenated natural product thapsigargin (1) and the pentaoxygenated nortrilobolide (3) was compared in order to develop a chemo- and regioselective method for the conversion of nortrilobolide (3) into the natural product 2-acetoxytrilobolide (4). For the first time, a stereoselective synthesis of 2-acetoxytrilobolide (4) is described, which involves two key reactions: the first chemical step was a one-pot substitution-oxidation reaction of an allylic ester into its corresponding α,β-unsaturated ketone. The second process consisted of a stereoselective α'-acyloxylation of the key intermediate α,β-unsaturated ketone to afford its corresponding acetoxyketone, which was converted into 2-acetoxytrilobolide (4) in a few steps. This innovative approach would allow the synthesis of a broad library of novel and valuable penta- and hexaoxygenated guaianolides as potential anticancer agents.
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Affiliation(s)
- Nhu Thi Quynh Doan
- †Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - François Crestey
- †Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
| | - Carl Erik Olsen
- ‡Department of Plant and Environmental Sciences, Faculty of Science, University of Copenhagen, Thorvaldsensvej 40, 1871 Frederiksberg C, Denmark
| | - Søren Brøgger Christensen
- †Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen Ø, Denmark
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Doan NTQ, Paulsen ES, Sehgal P, Møller JV, Nissen P, Denmeade SR, Isaacs JT, Dionne CA, Christensen SB. Targeting thapsigargin towards tumors. Steroids 2015; 97:2-7. [PMID: 25065587 PMCID: PMC4696022 DOI: 10.1016/j.steroids.2014.07.009] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/14/2014] [Revised: 07/04/2014] [Accepted: 07/09/2014] [Indexed: 11/16/2022]
Abstract
The skin irritating principle from Thapsia garganica was isolated, named thapsigargin and the structure elucidated. By inhibiting the sarco/endoplasmic reticulum Ca(2+) ATPase (SERCA) thapsigargin provokes apoptosis in almost all cells. By conjugating thapsigargin to peptides, which are only substrates for either prostate specific antigen (PSA) or prostate specific membrane antigen (PSMA) prodrugs were created, which selectively affect prostate cancer cells or neovascular tissue in tumors. One of the prodrug is currently tested in clinical phase II. The prodrug under clinical trial has been named mipsagargin.
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Affiliation(s)
- Nhu Thi Quynh Doan
- Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Eleonora Sandholdt Paulsen
- Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
| | - Pankaj Sehgal
- Department of Biomedicine, Ole Worms Allé 6, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Jesper Vuust Møller
- Department of Biomedicine, Ole Worms Allé 6, Aarhus University, DK-8000 Aarhus C, Denmark
| | - Poul Nissen
- Department of Molecular Biology and Genetics, Aarhus University, Gustav Wieds Vej 10, DK-8000 Aarhus C, Denmark
| | - Samuel R Denmeade
- The Bunting-Blaustein Cancer Research Building, 1650 Orleans Street, Baltimore, MD 21231, USA
| | - John T Isaacs
- The Bunting-Blaustein Cancer Research Building, 1650 Orleans Street, Baltimore, MD 21231, USA
| | - Craig A Dionne
- GenSpera, 2511 N Loop 1604 W, Suite 204, San Antonio, TX 78258, USA
| | - Søren Brøgger Christensen
- Department of Drug Design and Pharmacology, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark.
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17
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Jurášek M, Rimpelová S, Kmoníčková E, Drašar P, Ruml T. Tailor-made fluorescent trilobolide to study its biological relevance. J Med Chem 2014; 57:7947-54. [PMID: 25197766 DOI: 10.1021/jm500690j] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Trilobolide (Tb) is a potent natural counterpart of thapsigargin, which has shown promising results in cancer clinical trials. Here, we report a rational approach to study intracellular localization and biological activity of this sesquiterpene lactone. We conjugated Tb with a green-emitting Bodipy dye attached by alternative linkers of different lengths. The live-cell imaging of the prepared bioconjugates brought clear evidence that Tb-Bodipy localized in the endoplasmic reticulum (ER) of various cancer cell lines. The localization signal was compared with ER-specific dyes. Cytotoxicity of Tb conjugates and impact on the mitochondrial physiology and nitric oxide release were also studied. The nitric oxide production and cytokine secretion in rat peritoneal cells indicate immunobiological potential of these lactone bioconjugates. In summary, our Tb-Bodipy conjugates could help us to reveal the molecular mechanism of trilobolide for its further potential use in biomedical applications.
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Affiliation(s)
- Michal Jurášek
- Institute of Chemical Technology in Prague , 16628 Prague, Czech Republic
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18
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Harmatha J, Buděšínský M, Vokáč K, Kostecká P, Kmoníčková E, Zídek Z. Trilobolide and related sesquiterpene lactones from Laser trilobum possessing immunobiological properties. Fitoterapia 2013; 89:157-66. [PMID: 23747321 DOI: 10.1016/j.fitote.2013.05.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2013] [Revised: 05/23/2013] [Accepted: 05/27/2013] [Indexed: 11/18/2022]
Abstract
Three new and five known sesquiterpene lactones were isolated from the roots of Laser trilobum (L.) Borkh. Chemical identity of the known compounds and structural analysis of the new ones were determined by HR MS and NMR spectroscopy. The two new sesquiterpene lactones: 2-acetoxytrilobolide and 2-hydroxy-10-deacetyltrilobolide belong to the guaianolide type, and the third one, eudeslaserolide, to the biogenetically related eudesmanolide type. Both types, together with their biogenetic precursor of germacranolide type (laserolide) are present in L. trilobum, as well as in the related Laserpitium species. Purposefully selected set of these native sesquiterpene lactones was tested for specific immunobiological properties. The obtained results demonstrate that trilobolide and its acetoxy analog are strong activators of cytokine secretion. On the contrary, the other L. trilobum and Laserpitium siler constituents are only very mild activators, or even inhibitors of the cytokine and nitric oxide production.
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Affiliation(s)
- Juraj Harmatha
- Institute of Organic Chemistry and Biochemistry, Academy of Sciences, vvi, Prague, Czech Republic.
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Paulsen ES, Villadsen J, Tenori E, Liu H, Bonde DF, Lie MA, Bublitz M, Olesen C, Autzen HE, Dach I, Sehgal P, Nissen P, Møller JV, Schiøtt B, Christensen SB. Water-mediated interactions influence the binding of thapsigargin to sarco/endoplasmic reticulum calcium adenosinetriphosphatase. J Med Chem 2013; 56:3609-19. [PMID: 23574308 DOI: 10.1021/jm4001083] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
A crystal structure suggests four water molecules are present in the binding cavity of thapsigargin in sarco/endoplasmic reticulum calcium ATPase (SERCA). Computational chemistry indicates that three of these water molecules mediate an extensive hydrogen-bonding network between thapsigargin and the backbone of SERCA. The orientation of the thapsigargin molecule in SERCA is crucially dependent on these interactions. The hypothesis has been verified by measuring the affinity of newly synthesized model compounds, which are prevented from participating in such water-mediated interactions as hydrogen-bond donors.
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Affiliation(s)
- Eleonora S Paulsen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100 Copenhagen Ø, Denmark
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20
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Mahendar V, Oikawa H, Oguri H. Sequential [6+2], [2+2], and [3+2] annulations for rapid assembly of multiple fragments. Chem Commun (Camb) 2013; 49:2299-301. [DOI: 10.1039/c2cc38854e] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Thøgersen L, Nissen P. Flexible P-type ATPases interacting with the membrane. Curr Opin Struct Biol 2012; 22:491-9. [PMID: 22749193 DOI: 10.1016/j.sbi.2012.05.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2012] [Revised: 05/30/2012] [Accepted: 05/30/2012] [Indexed: 01/13/2023]
Abstract
Cation pumps and lipid flippases of the P-type ATPase family maintain electrochemical gradients and asymmetric lipid distributions across membranes, and offer significant insight of protein:membrane interactions. The sarcoplasmic reticulum Ca(2+)-ATPase features flexible and adaptive interactions with the surrounding membrane, while the Na(+),K(+)-ATPase complex is modulated by membrane components and a role for the γ-subunit as a stabilizer of a specific lipid interaction with the α-subunit has been proposed. The first crystal structure of a heavy-metal transporting ATPase shows a markedly amphipathic helix at the cytoplasmic membrane surface, highlighting this structure as a general motif of all P-type ATPases although with specialization to different membranes. Residues of central importance for the lipid flippase activity of the P4-type ATPase subfamily have been pinpointed by mutational studies, but the transport pathway and mechanism remain unknown.
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Affiliation(s)
- Lea Thøgersen
- Centre for Membrane Pumps in Cells and Disease - PUMPKIN, Danish National Research Foundation, DK-8000 Aarhus C, Denmark
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