1
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Thumma V, Mallikanti V, Matta R, Dharavath R, Jalapathi P. Design, synthesis, and cytotoxicity of ibuprofen-appended benzoxazole analogues against human breast adenocarcinoma. RSC Med Chem 2024; 15:1283-1294. [PMID: 38665840 PMCID: PMC11042172 DOI: 10.1039/d3md00479a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2023] [Accepted: 12/29/2023] [Indexed: 04/28/2024] Open
Abstract
A library of novel ibuprofen-appended benzoxazole analogues (7a-l) was synthesized via a series of nitration, reduction, and condensation-cyclization reactions and screened for their in vitro anticancer activity against human breast cancer MCF-7 and MDA-MB-231 cell lines using doxorubicin as a standard reference. Compounds 7h and 7j displayed outstanding activity against the MCF-7 cell line with an IC50 value of 8.92 ± 0.91 μM and 9.14 ± 8.22 μM, respectively, compared to the doxorubicin IC50 value of 9.29 ± 1.02 μM. Compound 7h also exhibited outstanding activity against the MDA-MB-231 cell line with an IC50 value of 7.54 ± 0.95 μM compared to the doxorubicin IC50 value of 7.68 ± 5.36 μM. Compounds 7h, 7i, 7j, and 7g showed identical morphological changes to those showed by doxorubicin. The molecular docking study against ERα unveiled their best docking scores and binding interactions in agreement to experimental results. Pharmacokinetics prediction envisaged their drug-like properties suitable for therapeutic applications.
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Affiliation(s)
- Vishnu Thumma
- Department of Sciences and Humanities, Matrusri Engineering College Hyderabad 500059 Telangana India
| | | | - Raghavender Matta
- Department of Chemistry, Shyam Lal College, University of Delhi Delhi-110032 India
| | - Ravinder Dharavath
- Department of Chemistry, SRT Campus, Hemwati Nandan Bahuguna Garhwal University Tehri 249199 Uttarakhand India
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2
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Leite JP, Costa-Rodrigues D, Gales L. Inhibitors of Transthyretin Amyloidosis: How to Rank Drug Candidates Using X-ray Crystallography Data. Molecules 2024; 29:895. [PMID: 38398647 PMCID: PMC10893244 DOI: 10.3390/molecules29040895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2024] [Revised: 02/12/2024] [Accepted: 02/16/2024] [Indexed: 02/25/2024] Open
Abstract
Amyloidosis is a group of protein misfolding diseases, which include spongiform encephalopathies, Alzheimer's disease and transthyretin (TTR) amyloidosis; all of them are characterized by extracellular deposits of an insoluble fibrillar protein. TTR amyloidosis is a highly debilitating and life-threatening disease. Patients carry less stable TTR homotetramers that are prone to dissociation into non-native monomers, which in turn rapidly self-assemble into oligomers and, ultimately, amyloid fibrils. Liver transplantation to induce the production of wild-type TTR was the only therapeutic strategy until recently. A promising approach to ameliorate transthyretin (TTR) amyloidosis is based on the so-called TTR kinetic stabilizers. More than 1000 TTR stabilizers have already been tested by many research groups, but the diversity of experimental techniques and conditions used hampers an objective prioritization of the compounds. One of the most reliable and unambiguous techniques applied to determine the structures of the TTR/drug complexes is X-ray diffraction. Most of the potential inhibitors bind in the TTR channel and the crystal structures reveal the atomic details of the interaction between the protein and the compound. Here we suggest that the stabilization effect is associated with a compaction of the quaternary structure of the protein and propose a scoring function to rank drugs based on X-ray crystallography data.
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Affiliation(s)
- José P. Leite
- ICBAS—Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, 4050-313 Porto, Portugal
| | - Diogo Costa-Rodrigues
- ICBAS—Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, 4050-313 Porto, Portugal
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
- IBMC—Instituto de Biologia Molecular e Celular, Universidade do Porto, 4200-135 Porto, Portugal
| | - Luís Gales
- ICBAS—Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, 4050-313 Porto, Portugal
- i3S—Instituto de Investigação e Inovação em Saúde, Universidade do Porto, 4200-135 Porto, Portugal
- IBMC—Instituto de Biologia Molecular e Celular, Universidade do Porto, 4200-135 Porto, Portugal
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3
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Yang DL, Li Y, Ma SQ, Zhang YJ, Huang JH, He LJ. Compound 275# Induces Mitochondria-Mediated Apoptosis and Autophagy Initiation in Colorectal Cancer Cells through an Accumulation of Intracellular ROS. Molecules 2023; 28:molecules28073211. [PMID: 37049976 PMCID: PMC10095895 DOI: 10.3390/molecules28073211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2023] [Revised: 03/28/2023] [Accepted: 03/30/2023] [Indexed: 04/08/2023] Open
Abstract
Colorectal cancer (CRC) is the most common intestinal malignancy, and nearly 70% of patients with this cancer develop metastatic disease. In the present study, we synthesized a novel compound, termed N-(3-(5,7-dimethylbenzo [d]oxazol-2-yl)phenyl)-5-nitrofuran-2-carboxamide (compound 275#), and found that it exhibits antiproliferative capability in suppressing the proliferation and growth of CRC cell lines. Furthermore, compound 275# triggered caspase 3-mediated intrinsic apoptosis of mitochondria and autophagy initiation. An investigation of the molecular mechanisms demonstrated that compound 275# induced intrinsic apoptosis, and autophagy initiation was largely mediated by increasing the levels of the intracellular accumulation of reactive oxygen species (ROS) in CRC cells. Taken together, these data suggest that ROS accumulation after treatment with compound 275# leads to mitochondria-mediated apoptosis and autophagy activation, highlighting the potential of compound 275# as a novel therapeutic agent for the treatment of CRC.
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Affiliation(s)
- Dong-Lin Yang
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
- College of Pharmaceutical Sciences and Chinese Medicine, Southwest University, Chongqing 400715, China
| | - Yong Li
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Shui-Qing Ma
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Ya-Jun Zhang
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
| | - Jiu-Hong Huang
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
- College of Pharmaceutical Sciences and Chinese Medicine, Southwest University, Chongqing 400715, China
| | - Liu-Jun He
- College of Pharmacy, National & Local Joint Engineering Research Center of Targeted and Innovative Therapeutics, Chongqing Key Laboratory of Kinase Modulators as Innovative Medicine, Chongqing University of Arts and Sciences, Chongqing 402160, China
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4
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Wang Y, Huang C, Liou G, Hsueh H, Liang C, Tseng H, Huang S, Chao C, Hsieh S, Tzeng S. A molecular basis for tetramer destabilization and aggregation of transthyretin Ala97Ser. Protein Sci 2023; 32:e4610. [PMID: 36851846 PMCID: PMC10037696 DOI: 10.1002/pro.4610] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 02/02/2023] [Accepted: 02/23/2023] [Indexed: 03/01/2023]
Abstract
Transthyretin (TTR)-related amyloidosis (ATTR) is a syndrome of diseases characterized by the extracellular deposition of fibrillar materials containing TTR variants. Ala97Ser (A97S) is the major mutation reported in Taiwanese ATTR patients. Here, we combine atomic resolution structural information together with the biochemical data to demonstrate that substitution of polar Ser for a small hydrophobic side chain of Ala at residue 97 of TTR largely influences the local packing density of the FG-loop, thus leading to the conformational instability of native tetramer, the increased monomeric species, and thus the enhanced amyloidogenicity of apo-A97S. Based on calorimetric studies, the tetramer destabilization of A97S can be substantially altered by interacting with native stabilizers via similarly energetic patterns compared to that of wild-type (WT) TTR; however, stabilizer binding partially rearranges the networks of hydrogen bonding in TTR variants while FG-loops of tetrameric A97S still remain relatively flexible. Moreover, TTR in complexed with holo-retinol binding protein 4 is slightly influenced by the structural and dynamic changes of FG-loop caused by A97S substitution with an approximately five-fold difference in binding affinity. Collectively, our findings suggest that the amyloidogenic A97S mutation destabilizes TTR by increasing the flexibility of the FG-loop in the monomer, thus modulating the rate of amyloid fibrillization.
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Affiliation(s)
- Yi‐Shiang Wang
- Institute of Biochemistry and Molecular BiologyCollege of Medicine, National Taiwan UniversityTaipeiTaiwan
| | - Chun‐Hsiang Huang
- Protein diffraction group, Experimental instrumentation divisionNational Synchrotron Radiation Research CenterHsinchuTaiwan
| | - Gunn‐Guang Liou
- Office of Research and Development, College of MedicineNational Taiwan UniversityTaipeiTaiwan
| | - Hsueh‐Wen Hsueh
- Department of Anatomy and Cell Biology, College of MedicineNational Taiwan UniversityTaipeiTaiwan
| | - Chi‐Ting Liang
- Institute of Biochemistry and Molecular BiologyCollege of Medicine, National Taiwan UniversityTaipeiTaiwan
| | - Hsi‐Ching Tseng
- Instrumentation CenterNational Taiwan UniversityTaipeiTaiwan
| | | | - Chi‐Chao Chao
- Department of NeurologyNational Taiwan University HospitalTaipeiTaiwan
| | - Sung‐Tsang Hsieh
- Graduate Institute of Brain and Mind SciencesTaipeiTaiwan
- Graduate Institute of Clinical MedicineTaipeiTaiwan
- Center of Precision MedicineNational Taiwan University College of MedicineTaipeiTaiwan
| | - Shiou‐Ru Tzeng
- Institute of Biochemistry and Molecular BiologyCollege of Medicine, National Taiwan UniversityTaipeiTaiwan
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5
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Rodphon W, Jaithum K, Linkhum S, Thongsornkleeb C, Tummatorn J, Ruchirawat S. Synthesis of Naphtho[2,3- d]oxazoles via Ag(I) Acid-Mediated Oxazole-Benzannulation of ortho-Alkynylamidoarylketones. J Org Chem 2023. [PMID: 35786915 DOI: 10.1021/acs.joc.2c00940] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A cascade oxazole-benzannulation for the synthesis of naphtho[2,3-d]oxazoles has been developed employing ortho-alkynylamidoarylketones as substrates. This procedure provides the advantage of preparing a wide variety of substituents on naphtho[2,3-d]oxazole structures. In addition, o-alkynylamidoarylketones could be prepared from easily accessible and a wide variety of commercially available starting materials. Therefore, this method is a judicious choice of strategy to synthesize naphtho[2,3-d]oxazoles with a great variety of substituents. In this work, 27 examples were demonstrated to provide the desired products in moderate to good yields.
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Affiliation(s)
- Warabhorn Rodphon
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Kanokwan Jaithum
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Sutida Linkhum
- Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Charnsak Thongsornkleeb
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.,Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Jumreang Tummatorn
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.,Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
| | - Somsak Ruchirawat
- Program on Chemical Sciences, Center of Excellence on Environmental Health and Toxicology (EHT), Chulabhorn Graduate Institute, OPS, MHESI, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand.,Laboratory of Medicinal Chemistry, Chulabhorn Research Institute, 54 Kamphaeng Phet 6, Laksi, Bangkok 10210, Thailand
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6
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Lee SB, Yu J, Kim H, Kim KW, Jeong JW, Kim YL, Park SJ, Koo TS, Lee C, Hong KB, Choi S. Novel Strategy To Inhibit Transthyretin Amyloidosis via the Synergetic Effect of Chemoselective Acylation and Noncovalent Inhibitor Release. J Med Chem 2023; 66:2893-2903. [PMID: 36749109 DOI: 10.1021/acs.jmedchem.2c01926] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Strategies for developing targeted covalent inhibitors (TCIs), which have the advantages of a prolonged duration of action and selectivity toward a drug target, have attracted great interest in drug discovery. Herein, we report chemoselective covalent inhibitors that specifically target lysine ε-amine groups that conjugate with an endogenous protein to prevent disease-causing protein misfolding and aggregation. These TCIs are unique because the benzoyl group is preferentially conjugated to Lys15 at the top of the T4 binding site within transthyretin (TTR) while simultaneously releasing a potent noncovalent TTR kinetic stabilizer. The potency of these covalent inhibitors is superior to tafamidis, the only FDA-approved drug for the treatment of hereditary TTR amyloidosis. In addition to investigations into the covalent modification of TTR via reverse-phase high-performance liquid chromatography, direct methods are performed to confirm and visualize the presumed covalent interaction via mass spectrometry and X-ray crystallography.
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Affiliation(s)
- Seok Beom Lee
- Graduate School of New Drug Discovery and Development, Chungnam National University, Daejon 34134, Republic of Korea
| | - Jaeni Yu
- Graduate School of New Drug Discovery and Development, Chungnam National University, Daejon 34134, Republic of Korea
| | - Hyunwoo Kim
- Department of Biological Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Kun Woo Kim
- Graduate School of New Drug Discovery and Development, Chungnam National University, Daejon 34134, Republic of Korea
| | - Jong Woo Jeong
- Graduate School of New Drug Discovery and Development, Chungnam National University, Daejon 34134, Republic of Korea
| | - Yun Lan Kim
- Graduate School of New Drug Discovery and Development, Chungnam National University, Daejon 34134, Republic of Korea
| | - Sung Jean Park
- College of Pharmacy and Gachon Institute of Pharmaceutical Sciences, Gachon University, Incheon 21936, Republic of Korea
| | - Tae-Sung Koo
- Graduate School of New Drug Discovery and Development, Chungnam National University, Daejon 34134, Republic of Korea
| | - Changwook Lee
- Department of Biological Sciences, Ulsan National Institute of Science and Technology, Ulsan 44919, Republic of Korea
| | - Ki Bum Hong
- New Drug Development Center (NDDC), Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), Daegu 41061, Republic of Korea
| | - Sungwook Choi
- Graduate School of New Drug Discovery and Development, Chungnam National University, Daejon 34134, Republic of Korea
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7
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Zhu J, Li Z, Li J, Tian D, Xu R, Tan Z, Chen Z, Tang W. Enantioselective rhodium-catalyzed addition of arylboronic acids to N-heteroaryl ketones: synthesis of α-hydroxy acids. Chem Sci 2023; 14:1606-1612. [PMID: 36794198 PMCID: PMC9906643 DOI: 10.1039/d2sc05907j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2022] [Accepted: 01/11/2023] [Indexed: 01/14/2023] Open
Abstract
The enantioselective addition of arylboronic acids to N-heteroaryl ketones provides a convenient access to chiral α-heteroaryl tertiary alcohols, yet addition reactions of this type have been challenging due to catalyst deactivation. In this report, an efficient rhodium-catalyzed addition of arylboronic acids to N-heteroaryl ketones is established, affording a variety of valuable α-heteroaryl alcohols with excellent functional group compatibility. The employment of the WingPhos ligand containing two anthryl groups is crucial for this transformation. In particular, a range of chiral benzoxazolyl-substituted tertiary alcohols were formed with excellent ee values and yields by employing a Rh loading as low as 0.3 mol%, which can serve as a practical protocol to furnish a series of chiral α-hydroxy acids after hydrolysis.
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Affiliation(s)
- Jinbin Zhu
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University Ganzhou 341000 China
| | - Zhenyue Li
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University Ganzhou 341000 China
| | - Jiaqi Li
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University Ganzhou 341000 China
| | - Duanshuai Tian
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Ling Ling Rd Shanghai 200032 China
| | - Ronghua Xu
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Ling Ling Rd Shanghai 200032 China
| | - Zhiyong Tan
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University Ganzhou 341000 China
| | - Zhengwang Chen
- Key Laboratory of Organo-Pharmaceutical Chemistry of Jiangxi Province, Gannan Normal University Ganzhou 341000 China
| | - Wenjun Tang
- State Key Laboratory of Bio-Organic and Natural Products Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences 345 Ling Ling Rd Shanghai 200032 China
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8
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Thakral S, Rani S, Lal K, Kumar D. Synthesis and Characterization of 2‐(2‐((1‐Aryl‐1H‐1,2,3‐triazol‐4‐yl)methoxy)phenyl)benzoxazoles: Evaluation of Cytotoxicity and Antioxidant Activity. ChemistrySelect 2022. [DOI: 10.1002/slct.202202790] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Affiliation(s)
- Sumit Thakral
- Department of Chemistry Guru Jambheshwar University of Science and Technology Hisar 125001 Haryana India
| | - Suman Rani
- Department of Chemistry Guru Jambheshwar University of Science and Technology Hisar 125001 Haryana India
| | - Kashmiri Lal
- Department of Chemistry Guru Jambheshwar University of Science and Technology Hisar 125001 Haryana India
| | - Devinder Kumar
- Department of Chemistry Guru Jambheshwar University of Science and Technology Hisar 125001 Haryana India
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9
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Jiang Y, Tang Y, Gao H, Rao G, Mao Z. Copper(II)-catalyzed synthesis of benzoxazoles from inactive 2-chloroanilides. Curr Org Synth 2022; 19:819-823. [DOI: 10.2174/1570179419666220225115017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2021] [Revised: 12/23/2021] [Accepted: 12/31/2021] [Indexed: 11/22/2022]
Abstract
Aim and Objective:
Benzoxazoles are of great importance in natural products, pharmaceutical agents as well as synthetic intermediates. Although many works reported on construction of benzoxazoles by Cu-catalyzed intramolecular O-arylation of ortho-haloanilides have been improved, there are very few reports about transition metal-catalyzed synthesis of benzoxazoles from inactive 2-chloroanilides so far. This work is to explore a green and cheap protocol for intramolecular O-arylation of inactive 2-chloroanilides to prepare 2-arylbenzoxazoles.
Materials and Methods:
We have found Cu(acac)2/1,10-Phen complex was beneficial to intramolecular O-arylation of 2-chloroanilides using K2CO3 as base in EtOH at 90 oC to prepare benzoxazoles.
Results:
An efficient and green method was developed for Cu(II)-catalyzed intramolecular O-arylation of inactive 2-chloroanilides.
Conclusion:
In this way, many 2-arylbenzoxazoles were prepared in good yields.
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Affiliation(s)
- Yuan Jiang
- School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming 650500, P. R. China
| | - Yanling Tang
- School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming 650500, P. R. China
| | - Hui Gao
- School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming 650500, P. R. China
| | - Gaoxiong Rao
- School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming 650500, P. R. China
| | - Zewei Mao
- School of Chinese Materia Medica, Yunnan University of Chinese Medicine, Kunming 650500, P. R. China
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10
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Small molecule protein binding to correct cellular folding or stabilize the native state against misfolding and aggregation. Curr Opin Struct Biol 2022; 72:267-278. [PMID: 34999558 DOI: 10.1016/j.sbi.2021.11.009] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2021] [Revised: 11/09/2021] [Accepted: 11/18/2021] [Indexed: 12/14/2022]
Abstract
Protein misfolding diseases are caused by the difficulty of a protein to attain or stably maintain its native three-dimensional structure. In 2011, the first small molecule that specifically binds to the folded state of a protein was approved by a regulatory agency to treat a protein misfolding disease (tafamidis, transthyretin amyloidosis). Subsequently, folded state binders for three additional pathologies were approved. All of these molecules bind specifically to and stabilize the native state of a misfolding-prone protein and either correct cellular folding or stabilize the native state against misfolding and aggregation. We will use these four case studies to explain how protein folding coupled to small molecule binding is a promising approach to treat a variety of human maladies.
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11
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Reum Han A, Hee Jeon E, Woo Kim K, Ki Lee S, Ohn CY, Jean Park S, Sook Kang N, Koo TS, Bum Hong K, Choi S. Synthesis and biological evaluation of quinolone derivatives as transthyretin amyloidogenesis inhibitors and fluorescence sensors. Bioorg Med Chem 2022; 53:116550. [PMID: 34890995 DOI: 10.1016/j.bmc.2021.116550] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2021] [Revised: 11/24/2021] [Accepted: 11/26/2021] [Indexed: 11/17/2022]
Abstract
Under certain conditions, numerous soluble proteins possess an inherent tendency to convert into insoluble amyloid aggregates, which are associated with several sporadic and genetic human diseases. Transthyretin (TTR) is one of the more than 30 human amyloidogenic proteins involved in conditions such as senile systemic amyloidosis, familial amyloid polyneuropathy, and familial amyloid cardiomyopathy. Considerable effort has been focused on identifying the native tetrameric TTR stabilizers to inhibit rate-limiting tetramer dissociation and, consequently, ameliorate TTR amyloidogenesis. Here, we describe the design and synthesis of quinolin-2(1H)-one derivatives that could be structurally complementary to the thyroxine-binding site within tetrameric TTR. Among these quinolin-2(1H)-one derivatives, compound 7a allowed 16.7% of V30M-TTR (3.6 μM) fibril formation at the same concentration and 49.6% at a concentration of 1.8 μM. Compound 7a exhibited much greater potency in complex biological samples like human plasma than that observed with tafamidis, the drug approved for the treatment of TTR amyloid cardiomyopathy for wild-type or hereditary TTR-mediated amyloidosis. Furthermore, the unique spectral properties of compound 7a demonstrated its high potential for TTR quantification, imaging sensors, and fluorescent tools to study the mechanism of TTR amyloidogenesis.
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Affiliation(s)
- Ah Reum Han
- Department of New Drug Discovery and Development, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejon 305-764, Republic of Korea
| | - Eun Hee Jeon
- Department of New Drug Discovery and Development, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejon 305-764, Republic of Korea
| | - Kun Woo Kim
- Department of New Drug Discovery and Development, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejon 305-764, Republic of Korea
| | - Seul Ki Lee
- Department of New Drug Discovery and Development, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejon 305-764, Republic of Korea
| | - Chan-Yeong Ohn
- Department of New Drug Discovery and Development, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejon 305-764, Republic of Korea
| | - Sung Jean Park
- College of Pharmacy and Gachon Institute of Pharmaceutical Sciences, Gachon University, 534-2 Yeonsu 3-dong, Yeonsu-gu, Incheon 406-799, Republic of Korea
| | - Nam Sook Kang
- Department of New Drug Discovery and Development, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejon 305-764, Republic of Korea
| | - Tae-Sung Koo
- Department of New Drug Discovery and Development, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejon 305-764, Republic of Korea
| | - Ki Bum Hong
- New Drug Development Center (NDDC), Daegu-Gyeongbuk Medical Innovation Foundation (DGMIF), 80 Cheombok-ro, Dong-gu, Daegu 701-310, Republic of Korea.
| | - Sungwook Choi
- Department of New Drug Discovery and Development, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejon 305-764, Republic of Korea.
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12
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Nguyen HT, Nguyen TH, Pham DD, Nguyen CT, Tran PH. A green approach for the synthesis of 2-substituted benzoxazoles and benzothiazoles via coupling/cyclization reactions. Heliyon 2021; 7:e08309. [PMID: 34820534 PMCID: PMC8601991 DOI: 10.1016/j.heliyon.2021.e08309] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 10/10/2021] [Accepted: 10/29/2021] [Indexed: 11/20/2022] Open
Abstract
We have developed the green method for the synthesis of benzoxazoles and benzothiazoles with moderate to good yields using imidazolium chlorozincate (II) ionic liquid supported into Fe3O4 nanoparticles (LAIL@MNP) under solvent-free sonication. The reaction was performed under mild conditions and only produced water as a sole byproduct. The reactions under solvent-free sonication showed advantages of faster reaction rate (30 min) and high yields of the products (up to 90%). Moreover, the LAIL@MNP material was easily separated from the reaction mixture and can be recycled for five consecutive runs with a slight decrease in its catalytic performance (from 82 to 73%).
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Affiliation(s)
- Hai Truong Nguyen
- Department of Organic Chemistry, Faculty of Chemistry, University of Science, Ho Chi Minh City, Viet Nam
- Vietnam National University, Ho Chi Minh City, Viet Nam
| | - Trinh Hao Nguyen
- Department of Organic Chemistry, Faculty of Chemistry, University of Science, Ho Chi Minh City, Viet Nam
- Vietnam National University, Ho Chi Minh City, Viet Nam
| | - Dung Duc Pham
- Faculty of Chemistry, Ho Chi Minh City University of Education, Viet Nam
| | - Cong Tien Nguyen
- Faculty of Chemistry, Ho Chi Minh City University of Education, Viet Nam
| | - Phuong Hoang Tran
- Department of Organic Chemistry, Faculty of Chemistry, University of Science, Ho Chi Minh City, Viet Nam
- Vietnam National University, Ho Chi Minh City, Viet Nam
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13
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The discovery and development of transthyretin amyloidogenesis inhibitors: what are the lessons? Future Med Chem 2021; 13:2083-2105. [PMID: 34633220 DOI: 10.4155/fmc-2021-0248] [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: 11/17/2022] Open
Abstract
Transthyretin (TTR) is associated with several human amyloid diseases. Various kinetic stabilizers have been developed to inhibit the dissociation of TTR tetramer and the formation of amyloid fibrils. Most of them are bisaryl derivatives, natural flavonoids, crown ethers and carborans. In this review article, we focus on TTR tetramer stabilizers, genetic therapeutic approaches and fibril remodelers. The binding modes of typical bisaryl derivatives, natural flavonoids, crown ethers and carborans are discussed. Based on knowledge of the binding of thyroxine to TTR tetramer, many stabilizers have been screened to dock into the thyroxine binding sites, leading to TTR tetramer stabilization. Particularly, those stabilizers with unique binding profiles have shown great potential in developing the therapeutic management of TTR amyloidogenesis.
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14
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Zakarianezhad M, Makiabadi B, Sotoodeh P, Zeydabadi E. Investigation of the reaction mechanism between cyclohexyl isocyanide and dimethyl acetylenedicarboxylate in the presence of 2-mercaptobenzoxazole: a theoretical study. PHOSPHORUS SULFUR 2021. [DOI: 10.1080/10426507.2021.1901701] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
| | - Batoul Makiabadi
- Department of Chemical Engineering, Sirjan University of Technology, Sirjan, Iran
| | - Poureya Sotoodeh
- Department of Chemical Engineering, Sirjan University of Technology, Sirjan, Iran
| | - Elham Zeydabadi
- Department of Chemistry, Payam Noor University, Tehran, Iran
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15
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Phosphine-phosphonium ylides as ligands in palladium-catalysed C2-H arylation of benzoxazoles. CHINESE CHEM LETT 2020. [DOI: 10.1016/j.cclet.2020.04.008] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
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16
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In silico characterisation of olive phenolic compounds as potential cyclooxygenase modulators. Part 1. J Mol Graph Model 2020; 101:107719. [PMID: 32898836 DOI: 10.1016/j.jmgm.2020.107719] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 07/09/2020] [Accepted: 07/27/2020] [Indexed: 12/15/2022]
Abstract
Non-steroidal anti-inflammatory drugs (NSAIDs) are widely used to reduce pain. These target cyclooxygenase (COX) enzymes which produce inflammatory mediators. Adverse effects associated with the use of traditional NSAIDs have led to a rise in the development of alternative therapies. Derived from Olea Europaea, olive oil is a main component of the Mediterranean diet, containing phenolic compounds that contribute to its antioxidant and anti-inflammatory properties. It has previously been found that oleocanthal, a phenolic compound derived from the olive, had similar effects to ibuprofen, a commonly used NSAID. There is an abundance of olive phenolic compounds that have yet to be investigated for their anti-inflammatory properties. In this study, it was sought to identify potential olive-derived compounds with the ability to inhibit COX enzymes, and study the mechanisms using in silico approaches. Molecular docking was employed to determine the COX inhibitory potential of an olive phenolic compound library. From docking, it was determined that 1-oleyltyrosol (1OL) and ligstroside derivative 2 (LG2) demonstrated the greatest binding affinity to both COX-1 and COX-2. Interactions with these compounds were further examined using molecular dynamics simulations. The residue contributions to binding free energy were computed using Molecular Mechanics-Poisson Boltzmann Surface Area (MM-PBSA) methods, revealing that residues Leu93, Val116, Leu352, and Ala527 in COX-1 and COX-2 were key determinants of potential inhibition. Along with part 2 of this study, this work aims to identify and characterise novel phenolic compounds which may possess COX inhibitory properties.
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17
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Tang Y, Li M, Gao H, Rao G, Mao Z. Efficient Cu-catalyzed intramolecular O-arylation for synthesis of benzoxazoles in water. RSC Adv 2020; 10:14317-14321. [PMID: 35498497 PMCID: PMC9051899 DOI: 10.1039/d0ra00570c] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2020] [Accepted: 03/28/2020] [Indexed: 12/28/2022] Open
Abstract
An efficient method was developed for synthesis of benzoxazoles by Cu-catalyzed intramolecular O-arylation of o-halobenzanilides in water. This strategy provides several advantages, such as high yields, water as a green solvent and functional groups tolerance. An efficient method was developed for synthesis of benzoxazoles by Cu-catalyzed intramolecular O-arylation of o-halobenzanilides in water.![]()
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Affiliation(s)
- Yanling Tang
- College of Pharmaceutical Science, Yunnan University of Chinese Medicine Kunming 650500 P.R. China +86 871 65918232 +86 871 65918232
| | - Minxin Li
- College of Pharmaceutical Science, Yunnan University of Chinese Medicine Kunming 650500 P.R. China +86 871 65918232 +86 871 65918232
| | - Hui Gao
- College of Pharmaceutical Science, Yunnan University of Chinese Medicine Kunming 650500 P.R. China +86 871 65918232 +86 871 65918232
| | - Gaoxiong Rao
- College of Pharmaceutical Science, Yunnan University of Chinese Medicine Kunming 650500 P.R. China +86 871 65918232 +86 871 65918232
| | - Zewei Mao
- College of Pharmaceutical Science, Yunnan University of Chinese Medicine Kunming 650500 P.R. China +86 871 65918232 +86 871 65918232
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18
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Guo X, Liu Z, Zheng Y, Li Y, Li L, Liu H, Chen Z, Wu L. Review on the Structures and Activities of Transthyretin Amyloidogenesis Inhibitors. DRUG DESIGN DEVELOPMENT AND THERAPY 2020; 14:1057-1081. [PMID: 32210536 PMCID: PMC7071892 DOI: 10.2147/dddt.s237252] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/04/2019] [Accepted: 02/24/2020] [Indexed: 12/26/2022]
Abstract
Transthyretin (TTR) is a tetrameric protein, and its dissociation, aggregation, deposition, and misfolding are linked to several human amyloid diseases. As the main transporter for thyroxine (T4) in plasma and cerebrospinal fluid, TTR contains two T4-binding sites, which are docked with T4 and subsequently maintain the structural stability of TTR homotetramer. Affected by genetic disorders and detrimental environmental factors, TTR degrades to monomer and/or form amyloid fibrils. Reasonably, stabilization of TTR might be an efficient strategy for the treatment of TTR-related amyloidosis. However, only 10-25% of T4 in the plasma is bound to TTR under physiological conditions. Expectedly, T4 analogs with different structures aiming to bind to T4 pockets may displace the functions of T4. So far, a number of compounds including both natural and synthetic origin have been reported. In this paper, we summarized the potent inhibitors, including bisaryl structure-based compounds, flavonoids, crown ethers, and carboranes, for treating TTR-related amyloid diseases and the combination modes of some compounds binding to TTR protein.
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Affiliation(s)
- Xiaohua Guo
- College of Pharmacy, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Zhaowen Liu
- College of Pharmacy, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Yizhou Zheng
- College of Pharmacy, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Yamei Li
- College of Pharmacy, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Linfu Li
- College of Pharmacy, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Hai Liu
- College of Pharmacy, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Zhixi Chen
- College of Pharmacy, Gannan Medical University, Ganzhou 341000, People's Republic of China
| | - Longhuo Wu
- College of Pharmacy, Gannan Medical University, Ganzhou 341000, People's Republic of China
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19
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Cao H, Liu XJ, Bie FS, Yan P, Ma J, Shi YJ, Han Y. Efficient Synthesis of 2-Functionalized Benzoxazoles Catalyzed by Copper Iodide. HETEROCYCLES 2020. [DOI: 10.3987/com-20-14276] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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20
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S8-mediated decarboxylative cyclization of 2-nitrophenols with arylacetic acid: Synthesis of benzoxazoles. JOURNAL OF SAUDI CHEMICAL SOCIETY 2019. [DOI: 10.1016/j.jscs.2019.03.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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21
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Aljaar N, Gujjarappa R, Al‐Refai M, Shtaiwi M, Malakar CC. Overview on Recent Approaches towards Synthesis of 2‐Keto‐annulated Oxazole Derivatives. J Heterocycl Chem 2019. [DOI: 10.1002/jhet.3673] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Nayyef Aljaar
- Chemistry DepartmentThe Hashemite University P.O. Box 150459 Zarqa 13115 Jordan
| | - Raghuram Gujjarappa
- Department of ChemistryNational Institute of Technology Manipur Langol Imphal 795004 India
| | - Mahmoud Al‐Refai
- Department of Chemistry, Faculty of ScienceAl al‐Bayt University Al‐Mafraq 25113 Jordan
| | - Majed Shtaiwi
- Chemistry DepartmentThe Hashemite University P.O. Box 150459 Zarqa 13115 Jordan
| | - Chandi C. Malakar
- Department of ChemistryNational Institute of Technology Manipur Langol Imphal 795004 India
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22
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Gan H. S
8
‐Mediated Cyclization of 2‐Hydroxy/Amino anilines with Arylacetylene: Approach to Benzoxazoles and Benzimidazoles. ChemistrySelect 2019. [DOI: 10.1002/slct.201902349] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Haifeng Gan
- College of Biotechnology and Pharmaceutical EngineeringNanjing Tech University, Nanjing, Jiangsu 211800 P. R. China
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23
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Kim T, Lee SA, Noh T, Choi P, Choi SJ, Song BG, Kim Y, Park YT, Huh G, Kim YJ, Ham J. Synthesis, Structure Revision, and Cytotoxicity of Nocarbenzoxazole G. JOURNAL OF NATURAL PRODUCTS 2019; 82:1325-1330. [PMID: 30958679 DOI: 10.1021/acs.jnatprod.9b00072] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
The total synthesis of nocarbenzoxazoles F (1) and G (2), originally obtained from the marine-derived halophilic bacterial strain Nocardiopsis lucentensis DSM 44048, was achieved via a simple and versatile route involving microwave-assisted construction of a benzoxazole skeleton, followed by carbon-carbon bond formation with the corresponding aryl bromides. Unfortunately, the 1H and 13C NMR spectra of natural nocarbenzoxazole G did not agree with those of the synthesized compound. In particular, the spectra of the isolated and synthesized compounds showed considerable differences in the signals from the protons and carbons in the aryl group. The revised structure was validated by the total synthesis of the actual nocarbenzoxazole G (8c) molecule, which is a regioisomer of the compound that was reported earlier as nocarbenzoxazole G. The synthesized derivatives showed specific cytotoxicity to the human cervical carcinoma cell line, HeLa, but did not have any remarkable effect on the other cell lines.
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Affiliation(s)
- Taejung Kim
- Natural Products Research Institute , Korea Institute of Science and Technology (KIST) , 679 Saimdang-ro , Gangneung 25451 , Republic of Korea
| | - Sin-Ae Lee
- Natural Products Research Institute , Korea Institute of Science and Technology (KIST) , 679 Saimdang-ro , Gangneung 25451 , Republic of Korea
| | - Taesub Noh
- Natural Products Research Institute , Korea Institute of Science and Technology (KIST) , 679 Saimdang-ro , Gangneung 25451 , Republic of Korea
| | - Pilju Choi
- Natural Products Research Institute , Korea Institute of Science and Technology (KIST) , 679 Saimdang-ro , Gangneung 25451 , Republic of Korea
| | - Seon-Jun Choi
- Natural Products Research Institute , Korea Institute of Science and Technology (KIST) , 679 Saimdang-ro , Gangneung 25451 , Republic of Korea
| | - Bong Geun Song
- Natural Products Research Institute , Korea Institute of Science and Technology (KIST) , 679 Saimdang-ro , Gangneung 25451 , Republic of Korea
| | - Youngseok Kim
- Natural Products Research Institute , Korea Institute of Science and Technology (KIST) , 679 Saimdang-ro , Gangneung 25451 , Republic of Korea
| | - Young-Tae Park
- Natural Products Research Institute , Korea Institute of Science and Technology (KIST) , 679 Saimdang-ro , Gangneung 25451 , Republic of Korea
| | - Gyuwon Huh
- Natural Products Research Institute , Korea Institute of Science and Technology (KIST) , 679 Saimdang-ro , Gangneung 25451 , Republic of Korea
- Division of Bio-Medical Science & Technology , University of Science and Technology (UST) , 217 Gajeong-ro, Yuseong-gu , Daejeon 34113 , Republic of Korea
| | - Young-Joo Kim
- Natural Products Research Institute , Korea Institute of Science and Technology (KIST) , 679 Saimdang-ro , Gangneung 25451 , Republic of Korea
| | - Jungyeob Ham
- Natural Products Research Institute , Korea Institute of Science and Technology (KIST) , 679 Saimdang-ro , Gangneung 25451 , Republic of Korea
- Division of Bio-Medical Science & Technology , University of Science and Technology (UST) , 217 Gajeong-ro, Yuseong-gu , Daejeon 34113 , Republic of Korea
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24
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Mishra N, Singh AS, Agrahari AK, Singh SK, Singh M, Tiwari VK. Synthesis of Benz-Fused Azoles via C-Heteroatom Coupling Reactions Catalyzed by Cu(I) in the Presence of Glycosyltriazole Ligands. ACS COMBINATORIAL SCIENCE 2019; 21:389-399. [PMID: 30943366 DOI: 10.1021/acscombsci.9b00004] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Glycosyl triazoles are conveniently accessible and contain multiple metal-binding units that may assist in metal-mediated catalysis. Azide derivatives of d-glucose have been converted to their respective aryltriazoles and screened as ligands for the synthesis of 2-substituted benz-fused azoles and benzimidazoquinazolinones by Cu-catalyzed intramolecular Ullmann type C-heteroatom coupling. Good to excellent yields for a variety of benz-fused heterocyles were obtained for this readily accessible catalytic system.
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Affiliation(s)
- Nidhi Mishra
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Anoop S. Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Anand K. Agrahari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Sumit K. Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Mala Singh
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
| | - Vinod K. Tiwari
- Department of Chemistry, Institute of Science, Banaras Hindu University, Varanasi-221005, India
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25
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Uncovering the Neuroprotective Mechanisms of Curcumin on Transthyretin Amyloidosis. Int J Mol Sci 2019; 20:ijms20061287. [PMID: 30875761 PMCID: PMC6471102 DOI: 10.3390/ijms20061287] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2019] [Revised: 03/02/2019] [Accepted: 03/07/2019] [Indexed: 02/07/2023] Open
Abstract
Transthyretin (TTR) amyloidoses (ATTR amyloidosis) are diseases associated with transthyretin (TTR) misfolding, aggregation and extracellular deposition in tissues as amyloid. Clinical manifestations of the disease are variable and include mainly polyneuropathy and/or cardiomyopathy. The reasons why TTR forms aggregates and amyloid are related with amino acid substitutions in the protein due to mutations, or with environmental alterations associated with aging, that make the protein more unstable and prone to aggregation. According to this model, several therapeutic approaches have been proposed for the diseases that range from stabilization of TTR, using chemical chaperones, to clearance of the aggregated protein deposited in tissues in the form of oligomers or small aggregates, by the action of disruptors or by activation of the immune system. Interestingly, different studies revealed that curcumin presents anti-amyloid properties, targeting multiple steps in the ATTR amyloidogenic cascade. The effects of curcumin on ATTR amyloidosis will be reviewed and discussed in the current work in order to contribute to knowledge of the molecular mechanisms involved in TTR amyloidosis and propose more efficient drugs for therapy.
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26
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Gan H. Facile Preparation of Benzoxazoles from S
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‐Promoted Cyclization of 2‐Nitrophenols with Arylmethyl Chloride. ChemistrySelect 2019. [DOI: 10.1002/slct.201900550] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Affiliation(s)
- Haifeng Gan
- College of Biotechnology and Pharmaceutical EngineeringNanjing Tech University Nanjing Jiangsu 211800 P. R. China
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27
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Tsuda Y, Yamanaka K, Toyoshima R, Ueda M, Masuda T, Misumi Y, Ogura T, Ando Y. Development of transgenic Caenorhabditis elegans expressing human transthyretin as a model for drug screening. Sci Rep 2018; 8:17884. [PMID: 30552363 PMCID: PMC6294829 DOI: 10.1038/s41598-018-36357-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2018] [Accepted: 11/19/2018] [Indexed: 01/09/2023] Open
Abstract
Familial amyloid polyneuropathy is a hereditary systemic amyloidosis caused by a mutation in the transthyretin (TTR) gene. Amyloid deposits in tissues of patients contain not only full-length TTR but also C-terminal TTR fragments. However, in vivo models to evaluate the pathogenicity of TTR fragments have not yet been developed. Here, we generated transgenic Caenorhabditis elegans strains expressing several types of TTR fragments or full-length TTR fused to enhanced green fluorescent protein in the body wall muscle cells and analyzed the phenotypes of the worms. The transgenic strain expressing residues 81-127 of TTR, which included the β-strands F and H, formed aggregates and caused defective worm motility and a significantly shortened lifespan compared with other strains. These findings suggest that the C-terminal fragments of TTR may contribute to cytotoxicity of TTR amyloidosis in vivo. By using this C. elegans model system, we found that (-)-epigallocatechin-3-gallate, a major polyphenol in green tea, significantly inhibited the formation of aggregates, the defective motility, and the shortened lifespan caused by residues 81-127 of TTR. These results suggest that our newly developed C. elegans model system will be useful for in vivo pathological analyses of TTR amyloidosis as well as drug screening.
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Affiliation(s)
- Yukimoto Tsuda
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Kunitoshi Yamanaka
- Department of Molecular Cell Biology, Institute of Molecular Embryology and Genetics, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860-0811, Japan.
| | - Risa Toyoshima
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Mitsuharu Ueda
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan.
| | - Teruaki Masuda
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Yohei Misumi
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
| | - Teru Ogura
- Department of Molecular Cell Biology, Institute of Molecular Embryology and Genetics, Kumamoto University, 2-2-1 Honjo, Chuo-ku, Kumamoto, 860-0811, Japan
| | - Yukio Ando
- Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Chuo-ku, Kumamoto, 860-8556, Japan
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28
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Abdeen S, Kunkle T, Salim N, Ray AM, Mammadova N, Summers C, Stevens M, Ambrose AJ, Park Y, Schultz PG, Horwich AL, Hoang QQ, Chapman E, Johnson SM. Sulfonamido-2-arylbenzoxazole GroEL/ES Inhibitors as Potent Antibacterials against Methicillin-Resistant Staphylococcus aureus (MRSA). J Med Chem 2018; 61:7345-7357. [PMID: 30060666 DOI: 10.1021/acs.jmedchem.8b00989] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Extending from a study we recently published examining the antitrypanosomal effects of a series of GroEL/ES inhibitors based on a pseudosymmetrical bis-sulfonamido-2-phenylbenzoxazole scaffold, here, we report the antibiotic effects of asymmetric analogs of this scaffold against a panel of bacteria known as the ESKAPE pathogens ( Enterococcus faecium, Staphylococcus aureus, Klebsiella pneumoniae, Acinetobacter baumannii, Pseudomonas aeruginosa, and Enterobacter species). While GroEL/ES inhibitors were largely ineffective against K. pneumoniae, A. baumannii, P. aeruginosa, and E. cloacae (Gram-negative bacteria), many analogs were potent inhibitors of E. faecium and S. aureus proliferation (Gram-positive bacteria, EC50 values of the most potent analogs were in the 1-2 μM range). Furthermore, even though some compounds inhibit human HSP60/10 biochemical functions in vitro (IC50 values in the 1-10 μM range), many of these exhibited moderate to low cytotoxicity to human liver and kidney cells (CC50 values > 20 μM).
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Affiliation(s)
- Sanofar Abdeen
- Department of Biochemistry and Molecular Biology , Indiana University School of Medicine , 635 Barnhill Drive , Indianapolis , Indiana 46202 , United States
| | - Trent Kunkle
- Department of Biochemistry and Molecular Biology , Indiana University School of Medicine , 635 Barnhill Drive , Indianapolis , Indiana 46202 , United States
| | - Nilshad Salim
- Department of Biochemistry and Molecular Biology , Indiana University School of Medicine , 635 Barnhill Drive , Indianapolis , Indiana 46202 , United States
| | - Anne-Marie Ray
- Department of Biochemistry and Molecular Biology , Indiana University School of Medicine , 635 Barnhill Drive , Indianapolis , Indiana 46202 , United States
| | - Najiba Mammadova
- Department of Biochemistry and Molecular Biology , Indiana University School of Medicine , 635 Barnhill Drive , Indianapolis , Indiana 46202 , United States
| | - Corey Summers
- Department of Biochemistry and Molecular Biology , Indiana University School of Medicine , 635 Barnhill Drive , Indianapolis , Indiana 46202 , United States
| | - Mckayla Stevens
- Department of Biochemistry and Molecular Biology , Indiana University School of Medicine , 635 Barnhill Drive , Indianapolis , Indiana 46202 , United States
| | - Andrew J Ambrose
- College of Pharmacy, Department of Pharmacology and Toxicology , The University of Arizona , 1703 East Mabel Street , P.O. Box 210207, Tucson , Arizona 85721 , United States
| | - Yangshin Park
- Department of Biochemistry and Molecular Biology , Indiana University School of Medicine , 635 Barnhill Drive , Indianapolis , Indiana 46202 , United States.,Stark Neurosciences Research Institute , Indiana University School of Medicine , 320 West 15th Street, Suite 414 , Indianapolis , Indiana 46202 , United States.,Department of Neurology , Indiana University School of Medicine , 635 Barnhill Drive , Indianapolis , Indiana 46202 , United States
| | - Peter G Schultz
- Department of Chemistry , The Scripps Research Institute , 10550 North Torrey Pines Road , La Jolla , California 92037 , United States
| | - Arthur L Horwich
- HHMI, Department of Genetics, Yale School of Medicine , Boyer Center for Molecular Medicine , 295 Congress Avenue , New Haven , Connecticut 06510 , United States
| | - Quyen Q Hoang
- Department of Biochemistry and Molecular Biology , Indiana University School of Medicine , 635 Barnhill Drive , Indianapolis , Indiana 46202 , United States.,Stark Neurosciences Research Institute , Indiana University School of Medicine , 320 West 15th Street, Suite 414 , Indianapolis , Indiana 46202 , United States.,Department of Neurology , Indiana University School of Medicine , 635 Barnhill Drive , Indianapolis , Indiana 46202 , United States
| | - Eli Chapman
- College of Pharmacy, Department of Pharmacology and Toxicology , The University of Arizona , 1703 East Mabel Street , P.O. Box 210207, Tucson , Arizona 85721 , United States
| | - Steven M Johnson
- Department of Biochemistry and Molecular Biology , Indiana University School of Medicine , 635 Barnhill Drive , Indianapolis , Indiana 46202 , United States
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29
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Feng P, Ma G, Zhang T, Wang C. Copper-Catalyzed Direct C−H Bond Arylation of Benzoxazoles with Anilines. ASIAN J ORG CHEM 2018. [DOI: 10.1002/ajoc.201800002] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Pengju Feng
- College of Chemistry and Materials Science; Jinan University; Guagnzhou 510632 P. R. China
| | - Guojian Ma
- College of Chemistry and Materials Science; Jinan University; Guagnzhou 510632 P. R. China
| | - Tianyu Zhang
- Institute of Chemical Biology Guangzhou Institutes of Biomedicine and Health; Chinese Academy of Sciences; 190 Kaiyuan Avenue Guangzhou 510530 P. R. China
| | - Changwei Wang
- Institute of Chemical Biology Guangzhou Institutes of Biomedicine and Health; Chinese Academy of Sciences; 190 Kaiyuan Avenue Guangzhou 510530 P. R. China
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30
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Smith TP, Windsor IW, Forest KT, Raines RT. Stilbene Boronic Acids Form a Covalent Bond with Human Transthyretin and Inhibit Its Aggregation. J Med Chem 2017; 60:7820-7834. [PMID: 28920684 DOI: 10.1021/acs.jmedchem.7b00952] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Transthyretin (TTR) is a homotetrameric protein. Its dissociation into monomers leads to the formation of fibrils that underlie human amyloidogenic diseases. The binding of small molecules to the thyroxin-binding sites in TTR stabilizes the homotetramer and attenuates TTR amyloidosis. Herein, we report on boronic acid-substituted stilbenes that limit TTR amyloidosis in vitro. Assays of affinity for TTR and inhibition of its tendency to form fibrils were coupled with X-ray crystallographic analysis of nine TTR·ligand complexes. The ensuing structure-function data led to a symmetrical diboronic acid that forms a boronic ester reversibly with serine 117. This diboronic acid inhibits fibril formation by both wild-type TTR and a common disease-related variant, V30M TTR, as effectively as does tafamidis, a small-molecule drug used to treat TTR-related amyloidosis in the clinic. These findings establish a new modality for covalent inhibition of fibril formation and illuminate a path for future optimization.
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Affiliation(s)
- Thomas P Smith
- Department of Chemistry, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
| | - Ian W Windsor
- Department of Biochemistry, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
| | - Katrina T Forest
- Department of Chemistry, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States.,Department of Bacteriology, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
| | - Ronald T Raines
- Department of Chemistry, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States.,Department of Biochemistry, University of Wisconsin-Madison , Madison, Wisconsin 53706, United States
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31
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Affiliation(s)
- George M. Burslem
- Departments of Molecular,
Cellular, and Developmental Biology, Chemistry, and Pharmacology, Yale University, 219 Prospect Street, New Haven, Connecticut 06511, United States
| | - Craig M. Crews
- Departments of Molecular,
Cellular, and Developmental Biology, Chemistry, and Pharmacology, Yale University, 219 Prospect Street, New Haven, Connecticut 06511, United States
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32
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Cao H, Sun Y, Wang L, Zhao C, Fu J, Zhang A. Understanding the microscopic binding mechanism of hydroxylated and sulfated polybrominated diphenyl ethers with transthyretin by molecular docking, molecular dynamics simulations and binding free energy calculations. MOLECULAR BIOSYSTEMS 2017; 13:736-749. [PMID: 28217795 DOI: 10.1039/c6mb00638h] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Polybrominated diphenyl ethers (PBDEs), one typical type of persistent environmental contaminant, have toxicological effects such as disrupting thyroid homeostasis in the human body. The high binding affinities of hydroxylated metabolites of PBDEs (OH-PBDEs) with transthyretin (TTR) were considered to be one major reason for their extraordinary capacity of passing through the blood-brain barrier via competitive thyroid hormone (T4) transport protein binding. Recent findings showed that sulfated PBDEs can be formed in human liver cytosol as phase-II metabolites. However, experimentally determined data for the TTR binding potential of the sulfated PBDEs are still not available. Therefore, molecular docking and molecular dynamics (MD) simulations were employed in the present study to probe the molecular basis of TTR interacting with hydroxylated and sulfated PBDEs at the atomic level. The docking scores of LeDock were used to construct the structure-based predictive model. The calculated results showed that the sulfated PBDEs have stronger affinity for TTR than the corresponding OH-PBDEs. Further analysis of structural characteristics based on MD simulations indicated that upon the binding of PBDE metabolites, the stability of TTR was enhanced and the dissociation rate of the tetrameric protein structure was potentially decreased. Subsequent binding free energy calculations implied that van der Waals interactions are the dominant forces for the binding of these metabolites of PBDEs at the T4 site of TTR. The residues Ser117/Ser117' and Lys15/Lys15' were identified, by both residue energy decomposition and computational alanine-scanning mutagenesis methods, as key residues which play an important role in determining the binding orientations of the -OSO3- group of sulfated PBDEs by formation of either hydrogen bonds or electrostatic interactions, respectively. In general, the combination of docking calculations with MD simulations provided a theoretically toxicological assessment for the metabolites of PBDEs, deep insight into the recognition mechanism of TTR for these compounds, and thus more comprehensive understanding of the thyroid-related toxic effects of PBDEs as well.
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Affiliation(s)
- Huiming Cao
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. and College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Yuzhen Sun
- Institute of Environment and Health, Jianghan University, Wuhan 430056, China
| | - Ling Wang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. and College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Chunyan Zhao
- School of Pharmacy, Lanzhou University, Lanzhou 730000, China
| | - Jianjie Fu
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. and College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
| | - Aiqian Zhang
- State Key Laboratory of Environmental Chemistry and Ecotoxicology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China. and College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China and Institute of Environment and Health, Jianghan University, Wuhan 430056, China
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33
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Andrei SA, Sijbesma E, Hann M, Davis J, O’Mahony G, Perry MWD, Karawajczyk A, Eickhoff J, Brunsveld L, Doveston RG, Milroy LG, Ottmann C. Stabilization of protein-protein interactions in drug discovery. Expert Opin Drug Discov 2017; 12:925-940. [DOI: 10.1080/17460441.2017.1346608] [Citation(s) in RCA: 79] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Sebastian A. Andrei
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Eline Sijbesma
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Michael Hann
- Platform Technology and Science, Medicines Research Centre, GlaxoSmithKline R&D, Stevenage, UK
| | - Jeremy Davis
- Department of Chemistry, UCB Celltech, Slough, UK
| | - Gavin O’Mahony
- CVMD Medicinal Chemistry, Innovative Medicines and Early Development, AstraZeneca Gothenburg, Pepparedsleden, Mölndal, Sweden
| | - Matthew W. D. Perry
- RIA Medicinal Chemistry, Innovative Medicines and Early Development, AstraZeneca Gothenburg, Pepparedsleden, Mölndal, Sweden
| | - Anna Karawajczyk
- Medicinal Chemistry, Taros Chemicals GmbH & Co. KG, Dortmund, Germany
| | - Jan Eickhoff
- Assay development & screening, Lead Discovery Center GmbH, Dortmund, Germany
| | - Luc Brunsveld
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Richard G. Doveston
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Lech-Gustav Milroy
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
| | - Christian Ottmann
- Laboratory of Chemical Biology, Department of Biomedical Engineering and Institute for Complex Molecular Systems, Eindhoven University of Technology, Eindhoven, The Netherlands
- Department of Chemistry, University of Duisburg-Essen, Essen, Germany
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34
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Semi-quantitative models for identifying potent and selective transthyretin amyloidogenesis inhibitors. Bioorg Med Chem Lett 2017. [PMID: 28625364 DOI: 10.1016/j.bmcl.2017.05.080] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Rate-limiting dissociation of the tetrameric protein transthyretin (TTR), followed by monomer misfolding and misassembly, appears to cause degenerative diseases in humans known as the transthyretin amyloidoses, based on human genetic, biochemical and pharmacologic evidence. Small molecules that bind to the generally unoccupied thyroxine binding pockets in the native TTR tetramer kinetically stabilize the tetramer, slowing subunit dissociation proportional to the extent that the molecules stabilize the native state over the dissociative transition state-thereby inhibiting amyloidogenesis. Herein, we use previously reported structure-activity relationship data to develop two semi-quantitative algorithms for identifying the structures of potent and selective transthyretin kinetic stabilizers/amyloidogenesis inhibitors. The viability of these prediction algorithms, in particular the more robust in silico docking model, is perhaps best validated by the clinical success of tafamidis, the first-in-class drug approved in Europe, Japan, South America, and elsewhere for treating transthyretin aggregation-associated familial amyloid polyneuropathy. Tafamidis is also being evaluated in a fully-enrolled placebo-controlled clinical trial for its efficacy against TTR cardiomyopathy. These prediction algorithms will be useful for identifying second generation TTR kinetic stabilizers, should these be needed to ameliorate the central nervous system or ophthalmologic pathology caused by TTR aggregation in organs not accessed by oral tafamidis administration.
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35
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Synthesis and structure-activity relationships of novel fused ring analogues of Q203 as antitubercular agents. Eur J Med Chem 2017; 136:420-427. [PMID: 28527405 DOI: 10.1016/j.ejmech.2017.05.021] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 05/04/2017] [Accepted: 05/05/2017] [Indexed: 11/20/2022]
Abstract
A set of fused ring analogues of a new antitubercular agent, Q203, was designed and synthesized. To reduce the lipophilicity of Q203 caused by linearly extended side chains, shorter and heteroatoms containing fused rings were introduced into the side chain region. Antitubercular activity was tested against H37Rv-GFP replicating in liquid broth culture medium (extracellular) and within macrophages (intracellular). Many analogues showed potent extracellular activities as well as intracellular activities without cytotoxicity. Among them, compounds 18-21 displayed significant antitubercular activities with favorable metabolic stabilities. Representative compound 21 exhibited excellent in vivo pharmacokinetic values at high drug exposure levels in the plasma, which makes this compound promising candidate for a new antitubercular drug.
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36
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Gupta R, Sahu PK, Sahu PK, Srivastava S, Agarwal D. Environmental benign synthesis of novel double layered nano catalyst and their catalytic activity in synthesis of 2-substituted benzoxazoles. CATAL COMMUN 2017. [DOI: 10.1016/j.catcom.2017.01.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022] Open
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37
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Srivastava A, Shukla G, Singh MS. p -Toluenesulfonic acid-catalyzed metal-free formal [4 + 1] heteroannulation via N H/O H/S H functionalization: One-pot access to 2-aryl/hetaryl/alkyl benzazole derivatives. Tetrahedron 2017. [DOI: 10.1016/j.tet.2016.12.073] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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38
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Chang W, Sun Y, Huang Y. One-pot green synthesis of benzoxazole derivatives through molecular sieve-catalyzed oxidative cyclization reaction. HETEROATOM CHEMISTRY 2017. [DOI: 10.1002/hc.21360] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Weichieh Chang
- Department of Applied Chemistry; National University of Kaohsiung; Kaohsiung Taiwan
| | - Yukai Sun
- Department of Chemistry; National Tsing Hua University; Hsinchu Taiwan
| | - Yungtzung Huang
- Department of Applied Chemistry; National University of Kaohsiung; Kaohsiung Taiwan
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39
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Naeimi H, Rahmatinejad S. Convenient Ultrasound Promoted Synthesis of 2-Aryl Benzoxazoles in the Presence of KCN/Ionic Liquid as an Efficient Catalyst under Mild Conditions. Polycycl Aromat Compd 2016. [DOI: 10.1080/10406638.2015.1053503] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Hossein Naeimi
- Department of Organic Chemistry, University of Kashan, Kashan, Iran
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40
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Systemic optimization and structural evaluation of quinoline derivatives as transthyretin amyloidogenesis inhibitors. Eur J Med Chem 2016; 123:777-787. [PMID: 27541261 DOI: 10.1016/j.ejmech.2016.08.003] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2016] [Revised: 08/02/2016] [Accepted: 08/04/2016] [Indexed: 12/12/2022]
Abstract
Wild type transthyretin (TTR) and mutant TTR misfold and misassemble into a variety of extracellular insoluble amyloid fibril and/or amorphous aggregate, which are associated with a variety of human amyloid diseases. To develop potent TTR amyloidogenesis inhibitors, we have designed and synthesized a focused library of quinoline derivatives by Pd-catalyzed coupling reaction and by the Horner-Wadsworth-Emmons reaction. The resulting 2-alkynylquinoline derivatives, (E)-2-alkenylquinoline derivatives, and (E)-3-alkenylquinoline derivatives were evaluated to inhibit TTR amyloidogenesis by utilizing the acid-mediated TTR fibril formation. Among these quinoline derivatives, compound 14c exhibited the most potent anti-TTR fibril formation activity in the screening studies, with IC50 values of 1.49 μM against WT-TTR and 1.63 μM against more amyloidogenic V30 M TTR mutant. That is comparable to that of approved therapeutic drug, tafamidis, to ameliorate transthyretin-related amyloidosis. Furthermore, rationalization of the increased efficacy of compound 14c bearing a hydrophobic substituent, such as chloride, was carried out by utilizing in silico docking study that could focus on the region of the thyroid hormone thyroxine (T4) binding sites. Additionally, the most potent compound 14c exhibited good pharmacokinetics properties. Taken together, the novel quinoline derivatives could potentially be explored as potential drug candidates to treat the human TTR amyloidosis.
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41
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Ankarcrona M, Winblad B, Monteiro C, Fearns C, Powers ET, Johansson J, Westermark GT, Presto J, Ericzon BG, Kelly JW. Current and future treatment of amyloid diseases. J Intern Med 2016; 280:177-202. [PMID: 27165517 PMCID: PMC4956553 DOI: 10.1111/joim.12506] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
There are more than 30 human proteins whose aggregation appears to cause degenerative maladies referred to as amyloid diseases or amyloidoses. These disorders are named after the characteristic cross-β-sheet amyloid fibrils that accumulate systemically or are localized to specific organs. In most cases, current treatment is limited to symptomatic approaches and thus disease-modifying therapies are needed. Alzheimer's disease is a neurodegenerative disorder with extracellular amyloid β-peptide (Aβ) fibrils and intracellular tau neurofibrillary tangles as pathological hallmarks. Numerous clinical trials have been conducted with passive and active immunotherapy, and small molecules to inhibit Aβ formation and aggregation or to enhance Aβ clearance; so far such clinical trials have been unsuccessful. Novel strategies are therefore required and here we will discuss the possibility of utilizing the chaperone BRICHOS to prevent Aβ aggregation and toxicity. Type 2 diabetes mellitus is symptomatically treated with insulin. However, the underlying pathology is linked to the aggregation and progressive accumulation of islet amyloid polypeptide as fibrils and oligomers, which are cytotoxic. Several compounds have been shown to inhibit islet amyloid aggregation and cytotoxicity in vitro. Future animal studies and clinical trials have to be conducted to determine their efficacy in vivo. The transthyretin (TTR) amyloidoses are a group of systemic degenerative diseases compromising multiple organ systems, caused by TTR aggregation. Liver transplantation decreases the generation of misfolded TTR and improves the quality of life for a subgroup of this patient population. Compounds that stabilize the natively folded, nonamyloidogenic, tetrameric conformation of TTR have been developed and the drug tafamidis is available as a promising treatment.
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Affiliation(s)
- M Ankarcrona
- Department of Neurobiology Care Sciences and Society, Division of Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, Huddinge, Sweden
| | - B Winblad
- Department of Neurobiology Care Sciences and Society, Division of Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, Huddinge, Sweden
| | - C Monteiro
- Department of Chemistry, The Skaggs Institute for Chemical Biology, La Jolla, CA, USA.,Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - C Fearns
- Department of Chemistry, The Skaggs Institute for Chemical Biology, La Jolla, CA, USA.,Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA, USA
| | - E T Powers
- Department of Chemistry, The Skaggs Institute for Chemical Biology, La Jolla, CA, USA
| | - J Johansson
- Department of Neurobiology Care Sciences and Society, Division of Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, Huddinge, Sweden
| | - G T Westermark
- Department of Medical Cell Biology, Uppsala University, Uppsala, Sweden
| | - J Presto
- Department of Neurobiology Care Sciences and Society, Division of Neurogeriatrics, Center for Alzheimer Research, Karolinska Institutet, Huddinge, Sweden
| | - B-G Ericzon
- Division of Transplantation Surgery, Karolinska University Hospital, Stockholm, Sweden
| | - J W Kelly
- Department of Chemistry, The Skaggs Institute for Chemical Biology, La Jolla, CA, USA.,Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA, USA
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42
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Convertino M, Das J, Dokholyan NV. Pharmacological Chaperones: Design and Development of New Therapeutic Strategies for the Treatment of Conformational Diseases. ACS Chem Biol 2016; 11:1471-89. [PMID: 27097127 DOI: 10.1021/acschembio.6b00195] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Errors in protein folding may result in premature clearance of structurally aberrant proteins, or in the accumulation of toxic misfolded species or protein aggregates. These pathological events lead to a large range of conditions known as conformational diseases. Several research groups have presented possible therapeutic solutions for their treatment by developing novel compounds, known as pharmacological chaperones. These cell-permeable molecules selectively provide a molecular scaffold around which misfolded proteins can recover their native folding and, thus, their biological activities. Here, we review therapeutic strategies, clinical potentials, and cost-benefit impacts of several classes of pharmacological chaperones for the treatment of a series of conformational diseases.
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Affiliation(s)
- Marino Convertino
- Department of Biochemistry
and Biophysics, University of North Carolina, 120 Mason Farm Road, Chapel Hill, North Carolina 27599, United States
| | - Jhuma Das
- Department of Biochemistry
and Biophysics, University of North Carolina, 120 Mason Farm Road, Chapel Hill, North Carolina 27599, United States
| | - Nikolay V. Dokholyan
- Department of Biochemistry
and Biophysics, University of North Carolina, 120 Mason Farm Road, Chapel Hill, North Carolina 27599, United States
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43
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Gan H, Miao D, Pan Q, Hu R, Li X, Han S. S8-Mediated Cyclization of 2-Aminophenols/thiophenols with Arylmethyl Chloride: Approach to Benzoxazoles and Benzothiazoles. Chem Asian J 2016; 11:1770-4. [DOI: 10.1002/asia.201600355] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2016] [Revised: 04/12/2016] [Indexed: 12/19/2022]
Affiliation(s)
- Haifeng Gan
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing Jiangsu 211816 P. R. China
| | - Dazhuang Miao
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing Jiangsu 211816 P. R. China
| | - Qiang Pan
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing Jiangsu 211816 P. R. China
| | - Renhe Hu
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing Jiangsu 211816 P. R. China
| | - Xiaotong Li
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing Jiangsu 211816 P. R. China
| | - Shiqing Han
- College of Biotechnology and Pharmaceutical Engineering; Nanjing Tech University; Nanjing Jiangsu 211816 P. R. China
- Key Laboratory of Synthetic Chemistry of Natural Substances; Shanghai Institute of Organic Chemistry, CAS; Shanghai 200032 P. R. China
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44
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Baranczak A, Connelly S, Liu Y, Choi S, Grimster NP, Powers ET, Wilson IA, Kelly JW. Fluorogenic small molecules requiring reaction with a specific protein to create a fluorescent conjugate for biological imaging--what we know and what we need to learn. Biopolymers 2016; 101:484-95. [PMID: 24105107 DOI: 10.1002/bip.22407] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Accepted: 09/03/2013] [Indexed: 01/03/2023]
Abstract
We seek fluorogenic small molecules that generate a fluorescent conjugate signal if and only if they react with a given protein-of-interest (i.e., small molecules for which noncovalent binding to the protein-of-interest is insufficient to generate fluorescence). Consequently, it is the new chemical entity afforded by the generally irreversible reaction between the small molecule and the protein-of-interest that enables the energy of an electron occupying the lowest unoccupied molecular orbital (LUMO) of the chromophore to be given off as a photon instead of being dissipated by nonradiative mechanisms in complex biological environments. This category of fluorogenic small molecules is created by starting with environmentally sensitive fluorophores that are modified by an essential functional group that efficiently quenches the fluorescence until a chemoselective reaction between that functional group and the protein-of-interest occurs, yielding the fluorescent conjugate. Fluorogenic small molecules are envisioned to be useful for a wide variety of applications, including live cell imaging without the requirement for washing steps and pulse-chase kinetic analyses of protein synthesis, trafficking, degradation, etc.
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Affiliation(s)
- Aleksandra Baranczak
- Department of Chemistry, The Skaggs Institute for Chemical Biology, The Scripps Research Institute, La Jolla, CA, 92037; Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA, 92037
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45
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Repositioning tolcapone as a potent inhibitor of transthyretin amyloidogenesis and associated cellular toxicity. Nat Commun 2016; 7:10787. [PMID: 26902880 PMCID: PMC4766415 DOI: 10.1038/ncomms10787] [Citation(s) in RCA: 120] [Impact Index Per Article: 15.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2015] [Accepted: 01/20/2016] [Indexed: 02/05/2023] Open
Abstract
Transthyretin (TTR) is a plasma homotetrameric protein implicated in fatal systemic amyloidoses. TTR tetramer dissociation precedes pathological TTR aggregation. Native state stabilizers are promising drugs to treat TTR amyloidoses. Here we repurpose tolcapone, an FDA-approved molecule for Parkinson's disease, as a potent TTR aggregation inhibitor. Tolcapone binds specifically to TTR in human plasma, stabilizes the native tetramer in vivo in mice and humans and inhibits TTR cytotoxicity. Crystal structures of tolcapone bound to wild-type TTR and to the V122I cardiomyopathy-associated variant show that it docks better into the TTR T4 pocket than tafamidis, so far the only drug on the market to treat TTR amyloidoses. These data indicate that tolcapone, already in clinical trials for familial amyloid polyneuropathy, is a strong candidate for therapeutic intervention in these diseases, including those affecting the central nervous system, for which no small-molecule therapy exists.
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46
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Baranczak A, Kelly JW. A current pharmacologic agent versus the promise of next generation therapeutics to ameliorate protein misfolding and/or aggregation diseases. Curr Opin Chem Biol 2016; 32:10-21. [PMID: 26859714 DOI: 10.1016/j.cbpa.2016.01.009] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2015] [Revised: 01/14/2016] [Accepted: 01/14/2016] [Indexed: 12/18/2022]
Abstract
The list of protein aggregation-associated degenerative diseases is long and growing, while the portfolio of disease-modifying strategies is very small. In this review and perspective, we assess what has worked to slow the progression of an aggregation-associated degenerative disease, covering the underlying mechanism of pharmacologic action and what we have learned about the etiology of the transthyretin amyloid diseases and likely amyloidoses in general. Next, we introduce emerging therapies that should apply more generally to protein misfolding and/or aggregation diseases, approaches that rely on adapting the protein homeostasis or proteostasis network for disease amelioration.
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Affiliation(s)
- Aleksandra Baranczak
- Department of Chemistry and The Skaggs Institute for Chemical Biology, La Jolla, CA 92037, USA; Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA.
| | - Jeffery W Kelly
- Department of Chemistry and The Skaggs Institute for Chemical Biology, La Jolla, CA 92037, USA; Department of Molecular and Experimental Medicine, The Scripps Research Institute, La Jolla, CA 92037, USA.
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47
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Ibrar A, Khan I, Abbas N, Farooq U, Khan A. Transition-metal-free synthesis of oxazoles: valuable structural fragments in drug discovery. RSC Adv 2016. [DOI: 10.1039/c6ra19324b] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
This review article encapsulates the recent developments in the metal-free approaches used to construct oxazole moiety.
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Affiliation(s)
- Aliya Ibrar
- Department of Chemistry
- COMSATS Institute of Information Technology
- Abbottabad-22060
- Pakistan
| | - Imtiaz Khan
- Department of Chemistry
- Quaid-i-Azam University
- Islamabad-45320
- Pakistan
| | - Naeem Abbas
- Department of Chemistry
- Quaid-i-Azam University
- Islamabad-45320
- Pakistan
| | - Umar Farooq
- Department of Chemistry
- COMSATS Institute of Information Technology
- Abbottabad-22060
- Pakistan
| | - Ajmal Khan
- Department of Chemistry
- COMSATS Institute of Information Technology
- Abbottabad-22060
- Pakistan
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48
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Aljaar N, Malakar CC, Conrad J, Beifuss U. Base-Promoted Domino Reaction of 5-Substituted 2-Nitrosophenols with Bromomethyl Aryl Ketones: A Transition-Metal-Free Approach to 2-Aroylbenzoxazoles. J Org Chem 2015; 80:10829-37. [PMID: 26399156 DOI: 10.1021/acs.joc.5b02000] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
The reaction of 5-substituted 2-nitrosophenols with bromomethyl aryl ketones and related compounds employing K2CO3 as a base in refluxing THF and DMF at 80 °C, respectively, delivers 2-aroylbenzoxazoles in a single step with yields up to 85%. The new method involves an intermolecular nucleophilic substitution followed by intramolecular 1,2-addition and elimination. It allows an efficient and practical access to 2-aroylbenzoxazoles under transition-metal-free conditions.
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Affiliation(s)
- Nayyef Aljaar
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim , Garbenstraße 30, D-70599 Stuttgart, Germany.,Faculty of Pharmacy and Medical Sciences, Al-Ahliyya Amman University , Amman 19328, Jordan
| | - Chandi C Malakar
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim , Garbenstraße 30, D-70599 Stuttgart, Germany
| | - Jürgen Conrad
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim , Garbenstraße 30, D-70599 Stuttgart, Germany
| | - Uwe Beifuss
- Bioorganische Chemie, Institut für Chemie, Universität Hohenheim , Garbenstraße 30, D-70599 Stuttgart, Germany
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Banerjee A, Dasgupta S, Mukhopadhyay BP, Sekar K. The putative role of some conserved water molecules in the structure and function of human transthyretin. ACTA ACUST UNITED AC 2015; 71:2248-66. [DOI: 10.1107/s1399004715016004] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2015] [Accepted: 08/26/2015] [Indexed: 11/10/2022]
Abstract
Human transthyretin (hTTR) is a multifunctional protein that is involved in several neurodegenerative diseases. Besides the transportation of thyroxin and vitamin A, it is also involved in the proteolysis of apolipoprotein A1 and Aβ peptide. Extensive analyses of 32 high-resolution X-ray and neutron diffraction structures of hTTR followed by molecular-dynamics simulation studies using a set of 15 selected structures affirmed the presence of 44 conserved water molecules in its dimeric structure. They are found to play several important roles in the structure and function of the protein. Eight water molecules stabilize the dimeric structure through an extensive hydrogen-bonding network. The absence of some of these water molecules in highly acidic conditions (pH ≤ 4.0) severely affects the interfacial hydrogen-bond network, which may destabilize the native tetrameric structure, leading to its dissociation. Three pairs of conserved water molecules contribute to maintaining the geometry of the ligand-binding cavities. Some other water molecules control the orientation and dynamics of different structural elements of hTTR. This systematic study of the location, absence, networking and interactions of the conserved water molecules may shed some light on various structural and functional aspects of the protein. The present study may also provide some rational clues about the conserved water-mediated architecture and stability of hTTR.
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Synthesis and pharmacological evaluation of piperidine (piperazine)-substituted benzoxazole derivatives as multi-target antipsychotics. Bioorg Med Chem Lett 2015; 25:5299-305. [PMID: 26483200 DOI: 10.1016/j.bmcl.2015.09.045] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2015] [Revised: 09/05/2015] [Accepted: 09/18/2015] [Indexed: 12/11/2022]
Abstract
The present study describes the optimization of a series of novel benzoxazole-piperidine (piperazine) derivatives combining high dopamine D2 and serotonin 5-HT1A, 5-HT2A receptor affinities. Of these derivatives, the pharmacological features of compound 29 exhibited high affinities for the DA D2, 5-HT1A and 5-HT2A receptors, but low affinities for the 5-HT2C and histamine H1 receptors and human ether-a-go-go-related gene (hERG) channels. Furthermore, compound 29 reduced apomorphine-induced climbing and 1-(2,5-dimethoxy-4-iodophenyl)-2-aminopropane (DOI)-induced head twitching without observable catalepsy, even at the highest dose tested. Thus, compound 29 is a promising candidate as a multi-target antipsychotic treatment.
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