1
|
Xu Y, Gao HX, Pan C, Shi Y, Zhang C, Huang G, Feng C. Stereoselective Photoredox Catalyzed (3+3) Dipolar Cycloaddition of Nitrone with Aryl Cyclopropane. Angew Chem Int Ed Engl 2023; 62:e202310671. [PMID: 37700683 DOI: 10.1002/anie.202310671] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Revised: 09/08/2023] [Accepted: 09/11/2023] [Indexed: 09/14/2023]
Abstract
By resorting to the principle of remote activation, we herein demonstrate the first photoredox catalyzed (3+3) dipolar cycloaddition of nitrones with aryl cyclopropanes. Key to the fidelity of the reaction resides in a facile manner of substrate activation by single-electron transfer (SET) oxidation with photoredox catalysis, and the reaction takes place through a stepwise cascade encompassing a three-electron-type nucleophilic substitution triggered cyclopropane ring-opening and a diastereoselective 6-endo-trig radical cyclization manifold. The reaction proceeds under mild conditions with excellent regio- and stereoselectivity, nicely complementing the well-developed Lewis acid catalyzed cycloaddition of donor-acceptor cyclopropanes. Other merits of the protocol include wide scope of aryl cyclopropanes with diversified substitution patterns and good functional-group compatibility. A mechanism involving an aryl radical cation promoted remote activation mode was also proposed and supported by mechanistic experiments.
Collapse
Affiliation(s)
- Yao Xu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Hai-Xiang Gao
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Chengkai Pan
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Yue Shi
- Department of chemistry, School of science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin, 300072, P. R. China
| | - Chi Zhang
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| | - Genping Huang
- Department of chemistry, School of science and Tianjin Key Laboratory of Molecular Optoelectronic Sciences, Tianjin University, Tianjin, 300072, P. R. China
| | - Chao Feng
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), State Key Laboratory of Material-Oriented Chemical Engineering, School of Chemistry and Molecular Engineering, Nanjing Tech University, 30 South Puzhu Road, Nanjing, 211816, P. R. China
| |
Collapse
|
2
|
Wang N, Xiao X, Liu CX, Yao H, Huang N, Zou K. Recent Advances in the Total Synthesis of <i>Aspidosperma</i> and <i>Kopsia</i> Alkaloids Using Tetracyclic Pyridocarbazoles as Versatile Building Blocks. Adv Synth Catal 2022. [DOI: 10.1002/adsc.202200473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Xiao Xiao
- Zhejiang University of Technology CHINA
| | | | - Hui Yao
- China Three Gorges University CHINA
| | | | - Kun Zou
- China Three Gorges University CHINA
| |
Collapse
|
3
|
Kang J, Lewis TR, Gardner A, Andrade RB, Wang RE. Semi-syntheses and interrogation of indole-substituted Aspidosperma terpenoid alkaloids. Org Biomol Chem 2022; 20:3988-3997. [PMID: 35503511 DOI: 10.1039/d2ob00610c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We demonstrated here a series of Aspidosperma terpenoid alkaloids can be quickly prepared using semisynthesis from naturally sourced tabersonine, featuring multiple oxygen-based substituents on the indole ring such as hydroxy and methoxy groups. This panel of complex compounds enabled the exploration of indole modifications to optimize the indole alkaloids' anticancer activity, generating lead compounds (e.g., with C15-hydroxy, C16-methoxy, and/or C17-methoxy derivatizations) that potently inhibit cancer cell line growth in the single-digit micromolar range. These results can help guide the development of Aspidosperma terpenoid alkaloid therapeutics. Furthermore, this synthetic approach features late-stage facile derivatization on complex natural product molecules, providing a versatile path to indole derivatization of this family of alkaloids with diverse chemical functionalities for future medicinal chemistry and chemical biology discoveries.
Collapse
Affiliation(s)
- Jinfeng Kang
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA.
| | - Todd R Lewis
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA.
| | - Alex Gardner
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA.
| | - Rodrigo B Andrade
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA.
| | - Rongsheng E Wang
- Department of Chemistry, Temple University, 1901 N. 13th Street, Philadelphia, PA, 19122, USA.
| |
Collapse
|
4
|
Liu H, Tian L, Wang H, Li ZQ, Zhang C, Xue F, Feng C. A novel type of donor-acceptor cyclopropane with fluorine as the donor: (3 + 2)-cycloadditions with carbonyls. Chem Sci 2022; 13:2686-2691. [PMID: 35340862 PMCID: PMC8890111 DOI: 10.1039/d2sc00302c] [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: 01/17/2022] [Accepted: 01/26/2022] [Indexed: 12/16/2022] Open
Abstract
gem-Difluorocyclopropane diester is disclosed as a new type of donor–acceptor cyclopropane, which smoothly participates in (3 + 2)-cycloadditions with various aldehydes and ketones. This work represents the first application of gem-difluorine substituents as an unconventional donor group for activating cyclopropane substrates in catalytic cycloaddition reactions. With this method, a wide variety of densely functionalized gem-difluorotetrahydrofuran skeletons, which are otherwise difficult to prepare, could be readily assembled in high yields under mild reaction conditions. Computational studies show that the cleavage of the C–C bond between the difluorine and diester moieties occurs upon a SN2-type attack of the carbonyl oxygen. A new type of donor–acceptor cyclopropane with gem-difluorine as an unconventional donor group undergoes (3 + 2)-cycloadditions with various aldehydes/ketones, affording densely functionalized gem-difluorotetrahydrofurans.![]()
Collapse
Affiliation(s)
- Haidong Liu
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 P. R. China
| | - Lifang Tian
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 P. R. China
| | - Hui Wang
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 P. R. China
| | - Zhi-Qiang Li
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 P. R. China
| | - Chi Zhang
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 P. R. China
| | - Fei Xue
- Institute of Material Physics & Chemistry, College of Science, Nanjing Forestry University Nanjing 210037 China
| | - Chao Feng
- Technical Institute of Fluorochemistry (TIF), Institute of Advanced Synthesis (IAS), School of Chemistry and Molecular Engineering, Nanjing Tech University Nanjing 211816 P. R. China
| |
Collapse
|
5
|
Heravi MM, Amiri Z, Kafshdarzadeh K, Zadsirjan V. Synthesis of indole derivatives as prevalent moieties present in selected alkaloids. RSC Adv 2021; 11:33540-33612. [PMID: 35497516 PMCID: PMC9042329 DOI: 10.1039/d1ra05972f] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2021] [Accepted: 09/10/2021] [Indexed: 02/02/2023] Open
Abstract
Indoles are a significant heterocyclic system in natural products and drugs. They are important types of molecules and natural products and play a main role in cell biology. The application of indole derivatives as biologically active compounds for the treatment of cancer cells, microbes, and different types of disorders in the human body has attracted increasing attention in recent years. Indoles, both natural and synthetic, show various biologically vital properties. Owing to the importance of this significant ring system, the investigation of novel methods of synthesis have attracted the attention of the chemical community. In this review, we aim to highlight the construction of indoles as a moiety in selected alkaloids.
Collapse
Affiliation(s)
- Majid M Heravi
- Department of Chemistry, School of Physics and Chemistry, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| | - Zahra Amiri
- Department of Chemistry, School of Physics and Chemistry, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| | - Kosar Kafshdarzadeh
- Department of Chemistry, School of Physics and Chemistry, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| | - Vahideh Zadsirjan
- Department of Chemistry, School of Physics and Chemistry, Alzahra University Vanak Tehran Iran +98 2188041344 +98 9121329147
| |
Collapse
|
6
|
Zhao S, Sirasani G, Andrade RB. Aspidosperma and Strychnos alkaloids: Chemistry and biology. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2021; 86:1-143. [PMID: 34565505 DOI: 10.1016/bs.alkal.2021.05.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2023]
Abstract
Of Nature's nearly 3000 unique monoterpene indole alkaloids derived from tryptophan, those members belonging to the Aspidosperma and Strychnos families continue to impact the fields of natural products (i.e., isolation, structure determination, biosynthesis) and organic chemistry (i.e., chemical synthesis, methodology development) among others. This review covers the biological activity (Section 2), biosynthesis (Section 3), and synthesis of both classical and novel Aspidosperma (Section 4), Strychnos (Section 5), and selected bis-indole (Section 6) alkaloids. Technological advancements in genetic sequencing and bioinformatics have deepened our understanding of how Nature assembles these intriguing molecules. The proliferation of innovative synthetic strategies and tactics for the synthesis of the alkaloids covered in this review, which include contributions from over fifty research groups from around the world, are a testament to the creative power and technical skills of synthetic organic chemists. To be sure, Nature-the Supreme molecular architect and source of a dazzling array of irresistible chemical logic puzzles-continues to inspire scientists across multiple disciplines and will certainly continue to do so for the foreseeable future.
Collapse
Affiliation(s)
- Senzhi Zhao
- Department of Chemistry, Temple University, Philadelphia, PA, United States
| | | | - Rodrigo B Andrade
- Department of Chemistry, Temple University, Philadelphia, PA, United States
| |
Collapse
|
7
|
Pirenne V, Robert EGL, Waser J. Catalytic (3 + 2) annulation of donor-acceptor aminocyclopropane monoesters and indoles. Chem Sci 2021; 12:8706-8712. [PMID: 34257869 PMCID: PMC8246098 DOI: 10.1039/d1sc01127h] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 05/04/2021] [Indexed: 12/16/2022] Open
Abstract
The efficient catalytic activation of donor-acceptor aminocyclopropanes lacking the commonly used diester acceptor is reported here in a (3 + 2) dearomative annulation with indoles. Bench-stable tosyl-protected aminocyclopropyl esters were converted into cycloadducts in 46-95% yields and up to 95 : 5 diastereomeric ratio using catalytic amounts of triethylsilyl triflimide. Tricyclic indoline frameworks containing four stereogenic centers including all-carbon quaternary centers were obtained.
Collapse
Affiliation(s)
- Vincent Pirenne
- Laboratory of Catalysis and Organic Synthesis, Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de Lausanne Ch-1015 Lausanne Switzerland
| | - Emma G L Robert
- Laboratory of Catalysis and Organic Synthesis, Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de Lausanne Ch-1015 Lausanne Switzerland
| | - Jerome Waser
- Laboratory of Catalysis and Organic Synthesis, Institut des Sciences et Ingénierie Chimique, Ecole Polytechnique Fédérale de Lausanne Ch-1015 Lausanne Switzerland
| |
Collapse
|
8
|
Major Bioactive Alkaloids and Biological Activities of Tabernaemontana Species (Apocynaceae). PLANTS 2021; 10:plants10020313. [PMID: 33562893 PMCID: PMC7915066 DOI: 10.3390/plants10020313] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 01/24/2021] [Accepted: 01/29/2021] [Indexed: 01/28/2023]
Abstract
Several species belonging to the genus Tabernaemontana have been well researched and utilized for their wide-ranging biological activities. A few of the most prominent species include Tabernaemontana divaricata, Tabernaemontana catharinensis, Tabernaemontana crassa, and Tabernaemontana elegans. These species and many others within the genus often display pharmacological importance, which is habitually related to their chemical constituents. The secondary metabolites within the genus have demonstrated huge medicinal potential for the treatment of infections, pain, injuries, and various diseases. Regardless of the indispensable reports and properties displayed by Tabernaemontana spp., there remains a wide variety of plants that are yet to be considered or examined. Thus, an additional inclusive study on species within this genus is essential. The current review aimed to extensively analyze, collate, and describe an updated report of the current literature related to the major alkaloidal components and biological activities of species within the genus Tabernaemontana.
Collapse
|
9
|
Wang N, Jiang X. Synthetic Approaches to Tricyclic Aminoketones in the Total Synthesis of Aspidosperma and Kopsia Alkaloids. CHEM REC 2020; 21:295-314. [PMID: 33289266 DOI: 10.1002/tcr.202000131] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2020] [Revised: 11/21/2020] [Accepted: 11/23/2020] [Indexed: 12/13/2022]
Abstract
Aspidosperma and kopsia alkaloids are significant functional molecules because of their potent biological activities. Their intricate structures present an intrinsic synthetic challenge and thus attract significant attention from synthetic organic academic community. Over the past decades, a series of elegant strategies has been developed, in particular, the Stork's original Fischer indolization of tricyclic aminoketones 1. Herein, we report a comprehensive review on various synthetic approaches access to tricyclic aminoketones 1 and provide a practical guidance to readers whose are interested in employing tricyclic aminoketones 1 as versatile building blocks in the realm of total synthesis of aspidosperma, kopsia and structurally related alkaloids.
Collapse
Affiliation(s)
- Nengzhong Wang
- Shanghai Key Laboratory of Green Chemistry and Chemical Process, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, P. R. China
| | - Xuefeng Jiang
- Shanghai Key Laboratory of Green Chemistry and Chemical Process, School of Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai, 200062, P. R. China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai, 200032, P. R. China
| |
Collapse
|
10
|
Sokolova OO, Bower JF. Selective Carbon–Carbon Bond Cleavage of Cyclopropylamine Derivatives. Chem Rev 2020; 121:80-109. [DOI: 10.1021/acs.chemrev.0c00166] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Olga O. Sokolova
- School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
| | - John F. Bower
- School of Chemistry, University of Bristol, Bristol BS8 1TS, United Kingdom
- Department of Chemistry, University of Liverpool, Crown Street, Liverpool L69 7ZD, United Kingdom
| |
Collapse
|
11
|
Cholewczynski AE, Williams PC, Pierce JG. Stereocontrolled Synthesis of (±)-Melokhanine E via an Intramolecular Formal [3 + 2] Cycloaddition. Org Lett 2020; 22:714-717. [PMID: 31908171 PMCID: PMC7662073 DOI: 10.1021/acs.orglett.9b04546] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A convergent sequence to access the indole alkaloid (±)-melokhanine E in 12-steps (8-step longest linear sequence) and an 11% overall yield is reported. The approach utilizes two cyclopropane moieties as reactive precursors to a 1,3-dipole and imine species to enable stereoselective construction of the core scaffold through a formal [3 + 2] cycloaddition. The natural product was evaluated for its antimicrobial activity based on isolation reports; however, no activity was observed. The reported efforts serve as a synthetic platform to prepare an array of alkaloids bearing this core structural motif.
Collapse
Affiliation(s)
- Anna E Cholewczynski
- Department of Chemistry, College of Sciences , NC State University , Raleigh , North Carolina 27695 , United States
| | - Peyton C Williams
- Department of Chemistry, College of Sciences , NC State University , Raleigh , North Carolina 27695 , United States
| | - Joshua G Pierce
- Department of Chemistry, College of Sciences , NC State University , Raleigh , North Carolina 27695 , United States
| |
Collapse
|
12
|
Liu Z, Ju X, Ma S, Du C, Zhang W, Li H, Wang X, Xie X, She X. Asymmetric Total Synthesis of (+)-Winchinine B. J Org Chem 2019; 84:14994-15000. [DOI: 10.1021/acs.joc.9b02462] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Zaimin Liu
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xiaolin Ju
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Shiqiang Ma
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Chenglong Du
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Weiwei Zhang
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Huilin Li
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xiaolei Wang
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xingang Xie
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| | - Xuegong She
- State Key Laboratory of Applied Organic Chemistry, Department of Chemistry, Lanzhou University, Lanzhou 730000, People’s Republic of China
| |
Collapse
|
13
|
Saya JM, Ruijter E, Orru RVA. Total Synthesis of
Aspidosperma
and
Strychnos
Alkaloids through Indole Dearomatization. Chemistry 2019; 25:8916-8935. [DOI: 10.1002/chem.201901130] [Citation(s) in RCA: 80] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2019] [Indexed: 01/07/2023]
Affiliation(s)
- Jordy M. Saya
- Department of Chemistry & Pharmaceutical Sciences, Amsterdam Institute for Molecules, Medicines & SystemsVrije Universiteit Amsterdam De Boelelaan 1108 1081 HZ Amsterdam The Netherlands
| | - Eelco Ruijter
- Department of Chemistry & Pharmaceutical Sciences, Amsterdam Institute for Molecules, Medicines & SystemsVrije Universiteit Amsterdam De Boelelaan 1108 1081 HZ Amsterdam The Netherlands
| | - Romano V. A. Orru
- Department of Chemistry & Pharmaceutical Sciences, Amsterdam Institute for Molecules, Medicines & SystemsVrije Universiteit Amsterdam De Boelelaan 1108 1081 HZ Amsterdam The Netherlands
| |
Collapse
|
14
|
Zhang Y, Goto M, Oda A, Hsu PL, Guo LL, Fu YH, Morris-Natschke SL, Hamel E, Lee KH, Hao XJ. Antiproliferative Aspidosperma-Type Monoterpenoid Indole Alkaloids from Bousigonia mekongensis Inhibit Tubulin Polymerization. Molecules 2019; 24:E1256. [PMID: 30935100 PMCID: PMC6480704 DOI: 10.3390/molecules24071256] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2019] [Revised: 03/26/2019] [Accepted: 03/28/2019] [Indexed: 11/16/2022] Open
Abstract
Monoterpenoid indole alkaloids are structurally diverse natural products found in plants of the family Apocynaceae. Among them, vincristine and its derivatives are well known for their anticancer activity. Bousigonia mekongensis, a species in this family, contains various monoterpenoid indole alkaloids. In the current study, fourteen known aspidosperma-type monoterpenoid indole alkaloids (1⁻14) were isolated and identified from a methanol extract of the twigs and leaves of B. mekongensis for the first time. Among them, compounds 3, 6, 9, and 13 exhibited similar antiproliferative activity spectra against A549, KB, and multidrug-resistant (MDR) KB subline KB-VIN cells with IC50 values ranging from 0.5⁻0.9 μM. The above alkaloids efficiently induced cell cycle arrest at the G2/M phase by inhibiting tubulin polymerization as well as mitotic bipolar spindle formation. Computer modeling studies indicated that compound 7 likely forms a hydrogen bond (H-bond) with α- or β-tubulin at the colchicine site. Evaluation of the antiproliferative effects and SAR analysis suggested that a 14,15-double bond or 3α-acetonyl group is critical for enhanced antiproliferative activity. Mechanism of action studies demonstrated for the first time that compounds 3, 4, 6, 7, and 13 efficiently induce cell cycle arrest at G2/M by inhibiting tubulin polymerization by binding to the colchicine site.
Collapse
Affiliation(s)
- Yu Zhang
- Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
- Natural Product Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, USA.
| | - Masuo Goto
- Natural Product Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, USA.
| | - Akifumi Oda
- Graduate School of Pharmacy, Meijo University, 150 Yagotoyama, Tempaku-ku, Nagoya, Aichi 468-8503, Japan.
| | - Pei-Ling Hsu
- Natural Product Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, USA.
| | - Ling-Li Guo
- Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
| | - Yan-Hui Fu
- Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
| | - Susan L Morris-Natschke
- Natural Product Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, USA.
| | - Ernest Hamel
- Screening Technologies Branch, Developmental Therapeutics Program, Division of Cancer Treatment and Diagnosis, Frederick National Laboratory for Cancer Research, National Cancer Institute, Frederick, MD 21702, USA.
| | - Kuo-Hsiung Lee
- Natural Product Research Laboratories, UNC Eshelman School of Pharmacy, University of North Carolina, Chapel Hill, NC 27599, USA.
- Chinese Medicine Research and Development Center, China Medical University and Hospital, 2 Yuh-Der Road, Taichung 40447, Taiwan.
| | - Xiao-Jiang Hao
- Key Laboratory of Phytochemistry and Plant Resources in West China, Kunming Institute of Botany, Chinese Academy of Sciences, Kunming 650201, China.
| |
Collapse
|
15
|
Pandey G, Khamrai J, Mishra A, Maity P, Chikkade PK. Iminium ion-enamine cascade reaction enables the asymmetric total syntheses of aspidosperma alkaloids vincadifformine and ervinceine. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.08.025] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
16
|
Pandey G, Mishra A, Khamrai J. Generation of all carbon quaternary stereocenters at the C-3 carbon of piperidinones and pyrrolidinones and its application in natural product total synthesis. Tetrahedron 2018. [DOI: 10.1016/j.tet.2018.05.004] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
17
|
Kawai K, Bunno Y, Yoshino T, Matsunaga S. Weinreb Amide Directed Versatile C-H Bond Functionalization under (η 5 -Pentamethylcyclopentadienyl)cobalt(III) Catalysis. Chemistry 2018; 24:10231-10237. [PMID: 29732683 DOI: 10.1002/chem.201801750] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2018] [Indexed: 01/24/2023]
Abstract
The (η5 -pentamethylcyclopentadienyl)cobalt(III) (Cp*CoIII )-catalyzed C-H bond functionalization of aromatic, heteroaromatic, and α,β-unsaturated Weinreb amides was explored. C-H allylation reactions with the use of allyl carbonate and a perfluoroalkene, oxidative alkenylation reactions with the use of ethyl acrylate, iodination reactions with the use of N-iodosuccinimide, and amidation reactions with the use of dioxazolones were catalyzed by Cp*Co(CO)I2 in the presence of a cationic Ag salt and AgOAc to afford various synthetically useful building blocks. Mechanistic studies of the C-H allylation disclosed that the C-H activation step was rate determining and virtually irreversible.
Collapse
Affiliation(s)
- Kentaro Kawai
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo, 060-0812, Japan
| | - Youka Bunno
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo, 060-0812, Japan
| | - Tatsuhiko Yoshino
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo, 060-0812, Japan
| | - Shigeki Matsunaga
- Faculty of Pharmaceutical Sciences, Hokkaido University, Kita-12 Nishi-6, Kita-ku, Sapporo, 060-0812, Japan
| |
Collapse
|
18
|
Smedley CJ, Stanley PA, Qazzaz ME, Prota AE, Olieric N, Collins H, Eastman H, Barrow AS, Lim KH, Kam TS, Smith BJ, Duivenvoorden HM, Parker BS, Bradshaw TD, Steinmetz MO, Moses JE. Sustainable Syntheses of (-)-Jerantinines A & E and Structural Characterisation of the Jerantinine-Tubulin Complex at the Colchicine Binding Site. Sci Rep 2018; 8:10617. [PMID: 30006510 PMCID: PMC6045569 DOI: 10.1038/s41598-018-28880-2] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Accepted: 06/29/2018] [Indexed: 11/13/2022] Open
Abstract
The jerantinine family of Aspidosperma indole alkaloids from Tabernaemontana corymbosa are potent microtubule-targeting agents with broad spectrum anticancer activity. The natural supply of these precious metabolites has been significantly disrupted due to the inclusion of T. corymbosa on the endangered list of threatened species by the International Union for Conservation of Nature. This report describes the asymmetric syntheses of (-)-jerantinines A and E from sustainably sourced (-)-tabersonine, using a straight-forward and robust biomimetic approach. Biological investigations of synthetic (-)-jerantinine A, along with molecular modelling and X-ray crystallography studies of the tubulin-(-)-jerantinine B acetate complex, advocate an anticancer mode of action of the jerantinines operating via microtubule disruption resulting from binding at the colchicine site. This work lays the foundation for accessing useful quantities of enantiomerically pure jerantinine alkaloids for future development.
Collapse
Affiliation(s)
- Christopher J Smedley
- La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC 3086, Australia
| | - Paul A Stanley
- School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Mohannad E Qazzaz
- School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Andrea E Prota
- Laboratory of Biomolecular Research, Division of Biology and Chemistry, Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland
| | - Natacha Olieric
- Laboratory of Biomolecular Research, Division of Biology and Chemistry, Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland
| | - Hilary Collins
- School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Harry Eastman
- School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Andrew S Barrow
- La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC 3086, Australia
| | - Kuan-Hon Lim
- School of Pharmacy, University of Nottingham Malaysia Campus, Jalan Broga, 43500, Semenyih, Selangor, Malaysia
| | - Toh-Seok Kam
- Department of Chemistry, Faculty of Science, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Brian J Smith
- La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC 3086, Australia
| | | | - Belinda S Parker
- La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC 3086, Australia
| | - Tracey D Bradshaw
- School of Pharmacy, University of Nottingham, University Park, Nottingham, NG7 2RD, UK
| | - Michel O Steinmetz
- Laboratory of Biomolecular Research, Division of Biology and Chemistry, Paul Scherrer Institute, CH-5232, Villigen PSI, Switzerland
- University of Basel, Biozentrum, CH-4056, Basel, Switzerland
| | - John E Moses
- La Trobe Institute for Molecular Science, La Trobe University, Melbourne, VIC 3086, Australia.
| |
Collapse
|
19
|
Carqueijeiro I, Dugé de Bernonville T, Lanoue A, Dang TT, Teijaro CN, Paetz C, Billet K, Mosquera A, Oudin A, Besseau S, Papon N, Glévarec G, Atehortùa L, Clastre M, Giglioli-Guivarc'h N, Schneider B, St-Pierre B, Andrade RB, O'Connor SE, Courdavault V. A BAHD acyltransferase catalyzing 19-O-acetylation of tabersonine derivatives in roots of Catharanthus roseus enables combinatorial synthesis of monoterpene indole alkaloids. THE PLANT JOURNAL : FOR CELL AND MOLECULAR BIOLOGY 2018; 94:469-484. [PMID: 29438577 DOI: 10.1111/tpj.13868] [Citation(s) in RCA: 34] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 12/13/2017] [Accepted: 02/05/2018] [Indexed: 05/19/2023]
Abstract
While the characterization of the biosynthetic pathway of monoterpene indole alkaloids (MIAs) in leaves of Catharanthus roseus is now reaching completion, only two enzymes from the root counterpart dedicated to tabersonine metabolism have been identified to date, namely tabersonine 19-hydroxylase (T19H) and minovincine 19-O-acetyltransferase (MAT). Albeit the recombinant MAT catalyzes MIA acetylation at low efficiency in vitro, we demonstrated that MAT was inactive when expressed in yeast and in planta, suggesting an alternative function for this enzyme. Therefore, through transcriptomic analysis of periwinkle adventitious roots, several other BAHD acyltransferase candidates were identified based on the correlation of their expression profile with T19H and found to localize in small genomic clusters. Only one, named tabersonine derivative 19-O-acetyltransferase (TAT) was able to acetylate the 19-hydroxytabersonine derivatives from roots, such as minovincinine and hörhammericine, following expression in yeast. Kinetic studies also showed that the recombinant TAT was specific for root MIAs and displayed an up to 200-fold higher catalytic efficiency than MAT. In addition, gene expression analysis, protein subcellular localization and heterologous expression in Nicotiana benthamiana were in agreement with the prominent role of TAT in acetylation of root-specific MIAs, thereby redefining the molecular determinants of the root MIA biosynthetic pathway. Finally, identification of TAT provided a convenient tool for metabolic engineering of MIAs in yeast enabling efficiently mixing different biosynthetic modules spatially separated in the whole plant. This combinatorial synthesis associating several enzymes from Catharanthus roseus resulted in the conversion of tabersonine in tailor-made MIAs bearing both leaf and root-type decorations.
Collapse
Affiliation(s)
- Inês Carqueijeiro
- EA2106 'Biomolécules et Biotechnologies Végétales', Université de Tours, Tours, France
| | | | - Arnaud Lanoue
- EA2106 'Biomolécules et Biotechnologies Végétales', Université de Tours, Tours, France
| | - Thu-Thuy Dang
- Department of Biological Chemistry, The John Innes Centre, Norwich, NR4 7UH, UK
| | - Christiana N Teijaro
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania, 19122, USA
| | - Christian Paetz
- Max-Planck-Institute for Chemical Ecology, Beutenberg Campus, Hans-Knöll-Str. 8, D-07745, Jena, Germany
| | - Kevin Billet
- EA2106 'Biomolécules et Biotechnologies Végétales', Université de Tours, Tours, France
| | - Angela Mosquera
- EA2106 'Biomolécules et Biotechnologies Végétales', Université de Tours, Tours, France
- Laboratorio de Biotecnología, Universidad de Antioquia, Sede de Investigación Universitaria, Medellin, Colombia
| | - Audrey Oudin
- EA2106 'Biomolécules et Biotechnologies Végétales', Université de Tours, Tours, France
| | - Sébastien Besseau
- EA2106 'Biomolécules et Biotechnologies Végétales', Université de Tours, Tours, France
| | - Nicolas Papon
- EA3142 'Groupe d'Etude des Interactions Hôte-Pathogène', Université d'Angers, Angers, France
| | - Gaëlle Glévarec
- EA2106 'Biomolécules et Biotechnologies Végétales', Université de Tours, Tours, France
| | - Lucía Atehortùa
- Laboratorio de Biotecnología, Universidad de Antioquia, Sede de Investigación Universitaria, Medellin, Colombia
| | - Marc Clastre
- EA2106 'Biomolécules et Biotechnologies Végétales', Université de Tours, Tours, France
| | | | - Bernd Schneider
- Max-Planck-Institute for Chemical Ecology, Beutenberg Campus, Hans-Knöll-Str. 8, D-07745, Jena, Germany
| | - Benoit St-Pierre
- EA2106 'Biomolécules et Biotechnologies Végétales', Université de Tours, Tours, France
| | - Rodrigo B Andrade
- Department of Chemistry, Temple University, Philadelphia, Pennsylvania, 19122, USA
| | - Sarah E O'Connor
- Department of Biological Chemistry, The John Innes Centre, Norwich, NR4 7UH, UK
| | - Vincent Courdavault
- EA2106 'Biomolécules et Biotechnologies Végétales', Université de Tours, Tours, France
| |
Collapse
|
20
|
Pandey G, Khamrai J, Mishra A. Generation of All-Carbon Quaternary Stereocenters at the C-3 Carbon of Lactams via [3,3]-Sigmatropic Rearrangement and Revision of Absolute Configuration: Total Synthesis of (−)-Physostigmine. Org Lett 2017; 20:166-169. [DOI: 10.1021/acs.orglett.7b03537] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Affiliation(s)
- Ganesh Pandey
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
| | - Jagadish Khamrai
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
| | - Akash Mishra
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow 226014, India
| |
Collapse
|
21
|
Wang N, Liu J, Wang C, Bai L, Jiang X. Asymmetric Total Syntheses of (−)-Jerantinines A, C, and E, (−)-16-Methoxytabersonine, (−)-Vindoline, and (+)-Vinblastine. Org Lett 2017; 20:292-295. [DOI: 10.1021/acs.orglett.7b03694] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Nengzhong Wang
- Shanghai
Key Laboratory of Green Chemistry and Chemical Process, School of
Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China
| | - Jianrong Liu
- Shanghai
Key Laboratory of Green Chemistry and Chemical Process, School of
Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China
| | - Chen Wang
- Shanghai
Key Laboratory of Green Chemistry and Chemical Process, School of
Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China
| | - Leiyang Bai
- Shanghai
Key Laboratory of Green Chemistry and Chemical Process, School of
Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China
| | - Xuefeng Jiang
- Shanghai
Key Laboratory of Green Chemistry and Chemical Process, School of
Chemistry and Molecular Engineering, East China Normal University, 3663 North Zhongshan Road, Shanghai 200062, P. R. China
- State
Key Laboratory of Organometallic Chemistry, Shanghai Institute of
Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, P. R. China
| |
Collapse
|
22
|
Ivanova OA, Chagarovskiy AO, Shumsky AN, Krasnobrov VD, Levina II, Trushkov IV. Lewis Acid Triggered Vinylcyclopropane-Cyclopentene Rearrangement. J Org Chem 2017; 83:543-560. [PMID: 29110480 DOI: 10.1021/acs.joc.7b02351] [Citation(s) in RCA: 58] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
We report a mild Lewis acid induced isomerization of donor-acceptor cyclopropanes, containing an alkenyl moiety and diverse electron-withdrawing group(s) at the adjacent positions, into substituted cyclopentenes. We have found that 1,1,2-trisubstituted cyclopent-3-enes were exclusively obtained in yield of 51-99% when cyclopropanes with a 2-substituted alkenyl group as a donor underwent isomerization. For cyclopropanes bearing a trisubstituted alkenyl group either the corresponding cyclopent-3-enes or isomeric cyclopent-2-enes having two acceptor groups at the C(1) atom were formed, with the reaction selectivity being determined by the applied Lewis acid. We have shown that the reactivity of the donor-acceptor cyclopropane increases with the increase of the electron-donating character of (hetero)aromatic group attached to the alkenyl moiety. The synthetic utility of the developed methodology was also demonstrated through the synthesis of polysubstituted cyclopentane and piperidine derivatives.
Collapse
Affiliation(s)
- Olga A Ivanova
- Department of Chemistry, M.V. Lomonosov Moscow State University , Leninskie Gory 1-3, Moscow 119991, Russian Federation
| | - Alexey O Chagarovskiy
- Dmitry Rogachev National Research Center of Pediatric Hematology , Oncology and Immunology, Samory Mashela 1, Moscow 117997, Russian Federation.,Faculty of Science, RUDN University , Miklukho-Maklaya 6, Moscow 117198, Russian Federation
| | - Alexey N Shumsky
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences , Kosygina 4, Moscow 119334, Russian Federation
| | - Vasiliy D Krasnobrov
- Department of Chemistry, M.V. Lomonosov Moscow State University , Leninskie Gory 1-3, Moscow 119991, Russian Federation
| | - Irina I Levina
- Emanuel Institute of Biochemical Physics, Russian Academy of Sciences , Kosygina 4, Moscow 119334, Russian Federation
| | - Igor V Trushkov
- Dmitry Rogachev National Research Center of Pediatric Hematology , Oncology and Immunology, Samory Mashela 1, Moscow 117997, Russian Federation.,Faculty of Science, RUDN University , Miklukho-Maklaya 6, Moscow 117198, Russian Federation
| |
Collapse
|
23
|
Beltran F, Fabre I, Ciofini I, Miesch L. Direct Spirocyclization from Keto-sulfonamides: An Approach to Azaspiro Compounds. Org Lett 2017; 19:5042-5045. [PMID: 28929765 DOI: 10.1021/acs.orglett.7b02216] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Spontaneous spirocyclization of keto-sulfonamides via ynamides through a one-pot process is presented. Push-pull ynamides were obtained through Michael addition/elimination without Cu. The obtained azaspiro compounds are building blocks for indole alkaloids. Theoretical studies provide insights into the mechanism of the formal Conia-ene reaction.
Collapse
Affiliation(s)
- Frédéric Beltran
- Laboratoire de Chimie Organique Synthétique, Institut de Chimie, CNRS-UdS UMR 7177 , 4, rue Blaise Pascal CS 90032, 67081 Strasbourg, France
| | - Indira Fabre
- Chimie ParisTech, PSL Research University, CNRS, Institut de Recherche de Chimie Paris (IRCP) , 75005 Paris, France.,Département de chimie, École Normale Supérieure, PSL Research University, Sorbonne Universités, UPMC Univ. , Paris 06, CNRS, 75005 Paris, France
| | - Ilaria Ciofini
- Chimie ParisTech, PSL Research University, CNRS, Institut de Recherche de Chimie Paris (IRCP) , 75005 Paris, France
| | - Laurence Miesch
- Laboratoire de Chimie Organique Synthétique, Institut de Chimie, CNRS-UdS UMR 7177 , 4, rue Blaise Pascal CS 90032, 67081 Strasbourg, France
| |
Collapse
|
24
|
Abubakar IB, Lim KH, Kam TS, Loh HS. Enhancement of apoptotic activities on brain cancer cells via the combination of γ-tocotrienol and jerantinine A. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2017; 30:74-84. [PMID: 28545672 DOI: 10.1016/j.phymed.2017.03.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/29/2016] [Revised: 02/27/2017] [Accepted: 03/09/2017] [Indexed: 05/14/2023]
Abstract
BACKGROUND γ-Tocotrienol, a vitamin E isomer possesses pronounced in vitro anticancer activities. However, the in vivo potency has been limited by hardly achievable therapeutic levels owing to inefficient high-dose oral delivery which leads to subsequent metabolic degradation. Jerantinine A, an Aspidosperma alkaloid, originally isolated from Tabernaemontana corymbosa, has proved to possess interesting anticancer activities. However, jerantinine A also induces toxicity to non-cancerous cells. PURPOSE We adopted a combinatorial approach with the joint application of γ-tocotrienol and jerantinine A at lower concentrations in order to minimize toxicity towards non-cancerous cells while improving the potency on brain cancer cells. METHODS The antiproliferative potency of individual γ-tocotrienol and jerantinine A as well as combined in low-concentration was firstly evaluated on U87MG cancer and MRC5 normal cells. Morphological changes, DNA damage patterns, cell cycle arrests and the effects of individual and combined low-concentration compounds on microtubules were then investigated. Finally, the potential roles of caspase enzymes and apoptosis-related proteins in mediating the apoptotic mechanisms were investigated using apoptosis antibody array, ELISA and Western blotting analysis. RESULTS Combinatorial study between γ-tocotrienol at a concentration range (0-24µg/ml) and fixed IC20 concentration of jerantinine A (0.16µg/ml) induced a potent antiproliferative effect on U87MG cells and led to a reduction on the new half maximal inhibitory concentration of γ-tocotrienol (i.e.tIC50=1.29µg/ml) as compared to that of individual γ-tocotrienol (i.e. IC50=3.17µg/ml). A reduction on undesirable toxicity to MRC5 normal cells was also observed. G0/G1 cell cycle arrest was evident on U87MG cells receiving IC50 of individual γ-tocotrienol and combined low-concentration compounds (1.29µg/ml γ-tocotrienol + 0.16µg/ml jerantinine A), whereas, a profound G2/M arrest was evident on cells treated with IC50 of individual jerantinine A. Additionally, individual jerantinine A and combined compounds (except individual γ-tocotrienol) caused a disruption of microtubule networks triggering Fas- and p53-induced apoptosis mediated via the death receptor and mitochondrial pathways. CONCLUSIONS These findings demonstrated that the combined use of lower concentrations of γ-tocotrienol and jerantinine A induced potent cytotoxic effects on U87MG cancer cells resulting in a reduction on the required individual concentrations and thereby minimizing toxicity of jerantinine A towards non-cancerous MRC5 cells as well as probably overcoming the high-dose limiting application of γ-tocotrienol. The multi-targeted mechanisms of action of the combination approach have shown a therapeutic potential against brain cancer in vitro and therefore, further in vivo investigations using a suitable animal model should be the way forward.
Collapse
Affiliation(s)
- Ibrahim Babangida Abubakar
- School of Biosciences, Faculty of Science, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia; Department of Biochemistry, Faculty of Science, Kebbi State University of Science and Technology Aleiro, PMB 1144, Kebbi State, Nigeria.
| | - Kuan-Hon Lim
- School of Pharmacy, Faculty of Science, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia.
| | - Toh-Seok Kam
- Department of Chemistry, University of Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Hwei-San Loh
- School of Biosciences, Faculty of Science, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia; Biotechnology Research Centre, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia.
| |
Collapse
|
25
|
Huber T, Preuhs TA, Gerlinger CKG, Magauer T. Development of a β-C–H Bromination Approach toward the Synthesis of Jerantinine E. J Org Chem 2017. [DOI: 10.1021/acs.joc.7b01095] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Affiliation(s)
- Tatjana Huber
- Department
of Chemistry and Pharmacy, Ludwig-Maximilians-University, 81377 Munich, Germany
| | - Teresa A. Preuhs
- Department
of Chemistry and Pharmacy, Ludwig-Maximilians-University, 81377 Munich, Germany
| | | | - Thomas Magauer
- Department
of Chemistry and Pharmacy, Ludwig-Maximilians-University, 81377 Munich, Germany
- Institute
of Organic Chemistry and Center for Molecular Biosciences, University of Innsbruck, 6020 Innsbruck, Austria
| |
Collapse
|
26
|
Chung FFL, Tan PFTM, Raja VJ, Tan BS, Lim KH, Kam TS, Hii LW, Tan SH, See SJ, Tan YF, Wong LZ, Yam WK, Mai CW, Bradshaw TD, Leong CO. Jerantinine A induces tumor-specific cell death through modulation of splicing factor 3b subunit 1 (SF3B1). Sci Rep 2017; 7:42504. [PMID: 28198434 PMCID: PMC5309811 DOI: 10.1038/srep42504] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2016] [Accepted: 01/13/2017] [Indexed: 02/08/2023] Open
Abstract
Precursor mRNA (pre-mRNA) splicing is catalyzed by a large ribonucleoprotein complex known as the spliceosome. Numerous studies have indicated that aberrant splicing patterns or mutations in spliceosome components, including the splicing factor 3b subunit 1 (SF3B1), are associated with hallmark cancer phenotypes. This has led to the identification and development of small molecules with spliceosome-modulating activity as potential anticancer agents. Jerantinine A (JA) is a novel indole alkaloid which displays potent anti-proliferative activities against human cancer cell lines by inhibiting tubulin polymerization and inducing G2/M cell cycle arrest. Using a combined pooled-genome wide shRNA library screen and global proteomic profiling, we showed that JA targets the spliceosome by up-regulating SF3B1 and SF3B3 protein in breast cancer cells. Notably, JA induced significant tumor-specific cell death and a significant increase in unspliced pre-mRNAs. In contrast, depletion of endogenous SF3B1 abrogated the apoptotic effects, but not the G2/M cell cycle arrest induced by JA. Further analyses showed that JA stabilizes endogenous SF3B1 protein in breast cancer cells and induced dissociation of the protein from the nucleosome complex. Together, these results demonstrate that JA exerts its antitumor activity by targeting SF3B1 and SF3B3 in addition to its reported targeting of tubulin polymerization.
Collapse
Affiliation(s)
- Felicia Fei-Lei Chung
- Center for Cancer and Stem Cell Research, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | | | - Vijay Joseph Raja
- Department of Biochemistry, Weill Cornell Medical College, New York, NY 10021, USA
| | - Boon-Shing Tan
- Institute of Biological Chemistry, Academia Sinica, Taipei, Taiwan
| | - Kuan-Hon Lim
- School of Pharmacy, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia
| | - Toh-Seok Kam
- Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Ling-Wei Hii
- Center for Cancer and Stem Cell Research, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
- School of Postgraduate Studies, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | - Si Hoey Tan
- Center for Cancer and Stem Cell Research, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
- School of Postgraduate Studies, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | - Sze-Jia See
- Center for Cancer and Stem Cell Research, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | - Yuen-Fen Tan
- Center for Cancer and Stem Cell Research, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
- School of Postgraduate Studies, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | - Li-Zhe Wong
- Center for Cancer and Stem Cell Research, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
- School of Postgraduate Studies, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | - Wai Keat Yam
- School of Pharmacy, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | - Chun Wai Mai
- School of Pharmacy, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| | - Tracey D. Bradshaw
- School of Pharmacy, University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - Chee-Onn Leong
- Center for Cancer and Stem Cell Research, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
- School of Pharmacy, International Medical University, Bukit Jalil, 57000 Kuala Lumpur, Malaysia
| |
Collapse
|
27
|
Gharpure SJ, Nanda LN. Application of oxygen/nitrogen substituted donor-acceptor cyclopropanes in the total synthesis of natural products. Tetrahedron Lett 2017. [DOI: 10.1016/j.tetlet.2017.01.033] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
|
28
|
Silveira D, de Melo AF, Magalhães P, Fonseca-Bazzo Y. Tabernaemontana Species: Promising Sources of New Useful Drugs. STUDIES IN NATURAL PRODUCTS CHEMISTRY 2017. [DOI: 10.1016/b978-0-444-63929-5.00007-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
|
29
|
Tan PW, Seayad J, Dixon DJ. Expeditious and Divergent Total Syntheses of Aspidosperma Alkaloids Exploiting Iridium(I)-Catalyzed Generation of Reactive Enamine Intermediates. Angew Chem Int Ed Engl 2016; 55:13436-13440. [DOI: 10.1002/anie.201605503] [Citation(s) in RCA: 98] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2016] [Revised: 08/18/2016] [Indexed: 11/12/2022]
Affiliation(s)
- Peng Wen Tan
- Department of Chemistry; Chemistry Research Laboratory; University of Oxford; 12 Mansfield Road Oxford UK
- Organic Chemistry; Institute of Chemical and Engineering Sciences; 8 Biomedical Grove, Neuros, #07-01 Singapore 138665 Singapore
| | - Jayasree Seayad
- Organic Chemistry; Institute of Chemical and Engineering Sciences; 8 Biomedical Grove, Neuros, #07-01 Singapore 138665 Singapore
| | - Darren J. Dixon
- Department of Chemistry; Chemistry Research Laboratory; University of Oxford; 12 Mansfield Road Oxford UK
| |
Collapse
|
30
|
Tan PW, Seayad J, Dixon DJ. Expeditious and Divergent Total Syntheses of Aspidosperma Alkaloids Exploiting Iridium(I)-Catalyzed Generation of Reactive Enamine Intermediates. Angew Chem Int Ed Engl 2016. [DOI: 10.1002/ange.201605503] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Peng Wen Tan
- Department of Chemistry; Chemistry Research Laboratory; University of Oxford; 12 Mansfield Road Oxford UK
- Organic Chemistry; Institute of Chemical and Engineering Sciences; 8 Biomedical Grove, Neuros, #07-01 Singapore 138665 Singapore
| | - Jayasree Seayad
- Organic Chemistry; Institute of Chemical and Engineering Sciences; 8 Biomedical Grove, Neuros, #07-01 Singapore 138665 Singapore
| | - Darren J. Dixon
- Department of Chemistry; Chemistry Research Laboratory; University of Oxford; 12 Mansfield Road Oxford UK
| |
Collapse
|
31
|
Abidi N, Franke R, Findeisen P, Klawonn F. Alignment of time-resolved data from high throughput experiments. J Bioinform Comput Biol 2016; 14:1650030. [PMID: 27629153 DOI: 10.1142/s021972001650030x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
To better understand the dynamics of the underlying processes in cells, it is necessary to take measurements over a time course. Modern high-throughput technologies are often used for this purpose to measure the behavior of cell products like metabolites, peptides, proteins, [Formula: see text]RNA or mRNA at different points in time. Compared to classical time series, the number of time points is usually very limited and the measurements are taken at irregular time intervals. The main reasons for this are the costs of the experiments and the fact that the dynamic behavior usually shows a strong reaction and fast changes shortly after a stimulus and then slowly converges to a certain stable state. Another reason might simply be missing values. It is common to repeat the experiments and to have replicates in order to carry out a more reliable analysis. The ideal assumptions that the initial stimulus really started exactly at the same time for all replicates and that the replicates are perfectly synchronized are seldom satisfied. Therefore, there is a need to first adjust or align the time-resolved data before further analysis is carried out. Dynamic time warping (DTW) is considered as one of the common alignment techniques for time series data with equidistant time points. In this paper, we modified the DTW algorithm so that it can align sequences with measurements at different, non-equidistant time points with large gaps in between. This type of data is usually known as time-resolved data characterized by irregular time intervals between measurements as well as non-identical time points for different replicates. This new algorithm can be easily used to align time-resolved data from high-throughput experiments and to come across existing problems such as time scarcity and existing noise in the measurements. We propose a modified method of DTW to adapt requirements imposed by time-resolved data by use of monotone cubic interpolation splines. Our presented approach provides a nonlinear alignment of two sequences that neither need to have equi-distant time points nor measurements at identical time points. The proposed method is evaluated with artificial as well as real data. The software is available as an R package tra (Time-Resolved data Alignment) which is freely available at: http://public.ostfalia.de/klawonn/tra.zip .
Collapse
Affiliation(s)
- Nada Abidi
- 1 Biostatistics, Helmholtz Centre for Infection Research, Inhoffenstr. 7, D-38124 Braunschweig, Germany
| | - Raimo Franke
- 2 Chemical Biology, Helmholtz Centre for Infection Research, Inhoffenstr. 7, D-38124 Braunschweig, Germany
| | - Peter Findeisen
- 3 Institute for Clinical Chemistry, Medical Faculty Mannheim, Heidelberg University Theodor-Kutzer-Ufer 1-3, D-68167 Mannheim, Germany
| | - Frank Klawonn
- 1 Biostatistics, Helmholtz Centre for Infection Research, Inhoffenstr. 7, D-38124 Braunschweig, Germany.,4 Department of Computer Science, Ostfalia University of Applied Sciences Salzdahlumer Str. 46/48, D-38302 Wolfenbuettel, Germany
| |
Collapse
|
32
|
Tan SH, Banwell MG, Willis AC. A Formal Total Synthesis of (±)-Kopsihainanine A Using a Raney-Cobalt Mediated Reductive Cyclization Route to Polyhydroquinolines. J Org Chem 2016; 81:8022-8. [PMID: 27419257 DOI: 10.1021/acs.joc.6b01400] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Perhydroquinoline 4, the product of a Raney-cobalt mediated reductive cyclization reaction, was readily converted into the cis-ring-fused perhydroquinoline 15 that could be epimerized to its trans-fused counterpart 2 on sequential treatment with iodosylbenzene then sodium borohydride. Tetracycle 2 is an advanced intermediate associated with a recently reported total synthesis of the alkaloid kopsihainanine A (1).
Collapse
Affiliation(s)
- Shen H Tan
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University , Canberra, ACT 2601, Australia
| | - Martin G Banwell
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University , Canberra, ACT 2601, Australia
| | - Anthony C Willis
- Research School of Chemistry, Institute of Advanced Studies, The Australian National University , Canberra, ACT 2601, Australia
| |
Collapse
|
33
|
Abubakar IB, Lim KH, Kam TS, Loh HS. Synergistic cytotoxic effects of combined δ-tocotrienol and jerantinine B on human brain and colon cancers. JOURNAL OF ETHNOPHARMACOLOGY 2016; 184:107-118. [PMID: 26947901 DOI: 10.1016/j.jep.2016.03.004] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2015] [Revised: 02/29/2016] [Accepted: 03/01/2016] [Indexed: 06/05/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE The genus Tabernaemontana has widespread distribution throughout tropical and subtropical parts of the world, i.e. Africa, Asia and America which has long been used for treatments of different disease conditions including tumours, wounds, syphilis, stomach ache and headache. Some Tabernaemontana species are used for treatment of piles, spleen and abdominal tumours in India. In particular, the leaf of Tabernaemontana corymbosa is used for treatment of tumours in Bangladesh. Parts of the plant or whole plants are used as decoctions, steam bath, powder and ointments. AIM OF STUDY The present study was undertaken to study the mechanism of apoptosis induction in human glioblastoma (U87MG) and colorectal adenocarcinoma (HT-29) cancer cells by a novel indole alkaloid, jerantinine B isolated from T. corymbosa, δ-tocotrienol and the combined low-dose treatments of δ-tocotrienol with IC20 dose of jerantinine B. MATERIALS AND METHODS Cell viability, isobologram and combinational index (CI) analyses were used to determine the pharmacological interaction between combined treatments based on the IC50 values obtained. Fluorescence and histochemical staining techniques as well as comet assay were used for evaluating the morphological changes and DNA damage pattern, respectively. The effects of treatments on microtubules, caspase activity and cell death were determined using immunofluorescence technique, caspase colorimetric and neutral red uptake assays, respectively. RESULTS Jerantinine B, δ-tocotrienol and combined low-dose treatments induced a dose-dependent growth inhibition against U87MG and HT-29 cells selectively with less toxicity acted towards the normal MRC5 cells. Synergistic growth inhibition observed with CI values of 0.85 and 0.77 for U87MG and HT-29 cells, resulting in up to 2-fold and 3.8-fold dose reduction of δ-tocotrienol and jerantinine B, respectively. U87MG and HT-29 cells exhibited morphological features of apoptosis and double stranded DNA breaks. Individual and combined treatments induced caspase 8 and 3 activities and cell death independent of caspase activation on U87MG and HT-29 cells. An increased caspase 9 activity was also evident on U87MG and HT-29 treated with combined treatments and HT-29 cells treated with jerantinine B. Jerantinine B and combined low-dose treatments with δ-tocotrienol undoubtedly disrupted the microtubule networks. CONCLUSION The present study demonstrated the mechanism for cytotoxic potency of δ-tocotrienol and jerantinine B against U87MG and HT-29 cells. Furthermore, combined low-dose treatments induced concurrent synergistic inhibition of cancer cell growth with concomitant dose reduction thus minimizing toxicity to normal cells and improving potency of δ-tocotrienol and jerantinine B.
Collapse
Affiliation(s)
- Ibrahim Babangida Abubakar
- School of Biosciences, Faculty of Science, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia.
| | - Kuan-Hon Lim
- School of Pharmacy, Faculty of Science, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia.
| | - Toh-Seok Kam
- Department of Chemistry, University of Malaya, Jalan Universiti, 50603 Kuala Lumpur, Malaysia.
| | - Hwei-San Loh
- School of Biosciences, Faculty of Science, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia; Biotechnology Research Centre, The University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia.
| |
Collapse
|
34
|
Abubakar IB, Loh HS. A review on ethnobotany, pharmacology and phytochemistry of Tabernaemontana corymbosa. ACTA ACUST UNITED AC 2016; 68:423-32. [PMID: 26887962 DOI: 10.1111/jphp.12523] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Accepted: 01/14/2016] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Tabernaemontana is a genus from the plant family, Apocynaceae with vast medicinal application and widespread distribution in the tropics and subtropics of Africa, Americas and Asia. The objective of this study is to critically evaluate the ethnobotany, medicinal uses, pharmacology and phytochemistry of the species, Tabernaemontana corymbosa (Roxb. ex Wall.) and provide information on the potential future application of alkaloids isolated from different parts of the plant. KEY FINDINGS T. corymbosa (Roxb. ex Wall.) parts are used as poultice, boiled juice, decoctions and infusions for treatment against ulceration, fracture, post-natal recovery, syphilis, fever, tumours and orchitis in Malaysia, China, Thailand and Bangladesh. Studies recorded alkaloids as the predominant phytochemicals in addition to phenols, saponins and sterols with vast bioactivities such as antimicrobial, analgesic, anthelmintic, vasorelaxation, antiviral and cytotoxicity. SUMMARY An evaluation of scientific data and traditional medicine revealed the medicinal uses of different parts of T. corymbosa (Roxb. ex Wall.) across Asia. Future studies exploring the structure-bioactivity relationship of alkaloids such as jerantinine and vincamajicine among others could potentially improve the future application towards reversing anticancer drug resistance.
Collapse
Affiliation(s)
- Ibrahim Babangida Abubakar
- School of Biosciences, Faculty of Science, The University of Nottingham Malaysia Campus, Semenyih, Selangor, Malaysia
| | - Hwei-San Loh
- School of Biosciences, Faculty of Science, The University of Nottingham Malaysia Campus, Semenyih, Selangor, Malaysia.,Biotechnology Research Centre, The University of Nottingham Malaysia Campus, Semenyih, Selangor, Malaysia
| |
Collapse
|
35
|
Qazzaz ME, Raja VJ, Lim KH, Kam TS, Lee JB, Gershkovich P, Bradshaw TD. In vitro anticancer properties and biological evaluation of novel natural alkaloid jerantinine B. Cancer Lett 2016; 370:185-97. [PMID: 26515390 DOI: 10.1016/j.canlet.2015.10.013] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2015] [Revised: 10/08/2015] [Accepted: 10/09/2015] [Indexed: 01/13/2023]
Abstract
Natural products play a pivotal role in medicine especially in the cancer arena. Many drugs that are currently used in cancer chemotherapy originated from or were inspired by nature. Jerantinine B (JB) is one of seven novel Aspidosperma indole alkaloids isolated from the leaf extract of Tabernaemontana corymbosa. Preliminary antiproliferative assays revealed that JB and JB acetate significantly inhibited growth and colony formation, accompanied by time- and dose-dependent apoptosis induction in human cancer cell lines. JB significantly arrested cells at the G2/M cell cycle phase, potently inhibiting tubulin polymerisation. Polo-like kinase 1 (PLK1; an early trigger for the G2/M transition) was also dose-dependently inhibited by JB (IC50 1.5 µM). Furthermore, JB provoked significant increases in reactive oxygen species (ROS). Annexin V+ cell populations, dose-dependent accumulation of cleaved-PARP and caspase 3/7 activation, and reduced Bcl-2 and Mcl-1 expression confirm apoptosis induction. Preclinical in silico biopharmaceutical assessment of JB calculated rapid absorption and bioavailability >70%. Doses of 8-16 mg/kg JB were predicted to maintain unbound plasma concentrations >GI50 values in mice during efficacy studies. These findings advocate continued development of JB as a potential chemotherapeutic agent.
Collapse
Affiliation(s)
- Mohannad E Qazzaz
- School of Pharmacy, Centre for Biomolecular Sciences, The University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - Vijay J Raja
- School of Pharmacy, Centre for Biomolecular Sciences, The University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - Kuan-Hon Lim
- School of Pharmacy, University of Nottingham Malaysia Campus, Jalan Broga, 43500 Semenyih, Selangor, Malaysia
| | - Toh-Seok Kam
- Department of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Jong Bong Lee
- School of Pharmacy, Centre for Biomolecular Sciences, The University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - Pavel Gershkovich
- School of Pharmacy, Centre for Biomolecular Sciences, The University of Nottingham, University Park, Nottingham NG7 2RD, UK
| | - Tracey D Bradshaw
- School of Pharmacy, Centre for Biomolecular Sciences, The University of Nottingham, University Park, Nottingham NG7 2RD, UK.
| |
Collapse
|
36
|
Li DY, Wei Y, Shi M. Iron(III)-Catalyzed 1,3-Functional Group Transposition Reactions: Synthetic Protocol to Access 3-Substituted Indoles. ASIAN J ORG CHEM 2016. [DOI: 10.1002/ajoc.201600037] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Affiliation(s)
- De-Yao Li
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Ling-Ling Lu Shanghai 200032 China), Fax: (+86) 21-64166128
| | - Yin Wei
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Ling-Ling Lu Shanghai 200032 China), Fax: (+86) 21-64166128
| | - Min Shi
- State Key Laboratory of Organometallic Chemistry; Shanghai Institute of Organic Chemistry; Chinese Academy of Sciences; 345 Ling-Ling Lu Shanghai 200032 China), Fax: (+86) 21-64166128
| |
Collapse
|
37
|
Pandey G, Khamrai J, Mishra A. An Expeditious Route to Both Enantiomers of All Carbon Quaternary Stereocenters at C-3 Carbon of Lactams via [3,3]-Sigmatropic Rearrangement: Total Synthesis of (−)-Physostigmine. Org Lett 2015; 17:952-5. [DOI: 10.1021/ol503766y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Ganesh Pandey
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow-226014, India
| | - Jagadish Khamrai
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow-226014, India
| | - Akash Mishra
- Molecular Synthesis and Drug
Discovery Laboratory, Centre of Biomedical Research, SGPGIMS Campus, Lucknow-226014, India
| |
Collapse
|
38
|
Nge CE, Gan CY, Lim KH, Ting KN, Low YY, Kam TS. Criofolinine and Vernavosine, New Pentacyclic Indole Alkaloids Incorporating Pyrroloazepine and Pyridopyrimidine Moieties Derived from a Common Yohimbine Precursor. Org Lett 2014; 16:6330-3. [DOI: 10.1021/ol503072g] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Choy-Eng Nge
- Department
of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Chew-Yan Gan
- University Malaysia of Computer Science and Engineering, Jalan Alamanda 2, Precint 1, 62000 Putrajaya, Malaysia
| | | | | | - Yun-Yee Low
- Department
of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - Toh-Seok Kam
- Department
of Chemistry, Faculty of Science, University of Malaya, 50603 Kuala Lumpur, Malaysia
| |
Collapse
|
39
|
de Nanteuil F, Serrano E, Perrotta D, Waser J. Dynamic Kinetic Asymmetric [3 + 2] Annulation Reactions of Aminocyclopropanes. J Am Chem Soc 2014; 136:6239-42. [DOI: 10.1021/ja5024578] [Citation(s) in RCA: 130] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Affiliation(s)
- Florian de Nanteuil
- Laboratory of Catalysis and
Organic Synthesis, Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO, BCH 4306, 1015 Lausanne, Switzerland
| | - Eloisa Serrano
- Laboratory of Catalysis and
Organic Synthesis, Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO, BCH 4306, 1015 Lausanne, Switzerland
| | - Daniele Perrotta
- Laboratory of Catalysis and
Organic Synthesis, Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO, BCH 4306, 1015 Lausanne, Switzerland
| | - Jerome Waser
- Laboratory of Catalysis and
Organic Synthesis, Ecole Polytechnique Fédérale de Lausanne, EPFL SB ISIC LCSO, BCH 4306, 1015 Lausanne, Switzerland
| |
Collapse
|
40
|
Neue Mitglieder der Chinesischen Akademie der Wissenschaften / Preise der Schweizerischen Chemischen Gesellschaft. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201310719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
41
|
New Academicians of the Chinese Academy of Sciences / Swiss Chemical Society Awards. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/anie.201310719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
42
|
de Nanteuil F, De Simone F, Frei R, Benfatti F, Serrano E, Waser J. Cyclization and annulation reactions of nitrogen-substituted cyclopropanes and cyclobutanes. Chem Commun (Camb) 2014; 50:10912-28. [DOI: 10.1039/c4cc03194f] [Citation(s) in RCA: 224] [Impact Index Per Article: 22.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
This feature article covers recent progress in cyclization and annulation reactions of aminocyclopropanes and aminocyclobutanes to access nitrogen-rich building blocks.
Collapse
Affiliation(s)
- F. de Nanteuil
- Laboratory of Catalysis and Organic Synthesis
- Ecole Polytechnique Fédérale de Lausanne
- EPFL SB ISIC LCSO
- 1015 Lausanne, Switzerland
| | - F. De Simone
- Laboratory of Catalysis and Organic Synthesis
- Ecole Polytechnique Fédérale de Lausanne
- EPFL SB ISIC LCSO
- 1015 Lausanne, Switzerland
| | - R. Frei
- Laboratory of Catalysis and Organic Synthesis
- Ecole Polytechnique Fédérale de Lausanne
- EPFL SB ISIC LCSO
- 1015 Lausanne, Switzerland
| | - F. Benfatti
- Laboratory of Catalysis and Organic Synthesis
- Ecole Polytechnique Fédérale de Lausanne
- EPFL SB ISIC LCSO
- 1015 Lausanne, Switzerland
| | - E. Serrano
- Laboratory of Catalysis and Organic Synthesis
- Ecole Polytechnique Fédérale de Lausanne
- EPFL SB ISIC LCSO
- 1015 Lausanne, Switzerland
| | - J. Waser
- Laboratory of Catalysis and Organic Synthesis
- Ecole Polytechnique Fédérale de Lausanne
- EPFL SB ISIC LCSO
- 1015 Lausanne, Switzerland
| |
Collapse
|