1
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Ramesh M, Acharya A, Murugan NA, Ila H, Govindaraju T. Thiophene-Based Dual Modulators of Aβ and Tau Aggregation. Chembiochem 2021; 22:3348-3357. [PMID: 34546619 DOI: 10.1002/cbic.202100383] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 09/21/2021] [Indexed: 01/29/2023]
Abstract
Alzheimer's disease is characterized by the accumulation of amyloid beta (Aβ) and Tau aggregates in the brain, which induces various pathological events resulting in neurodegeneration. There have been continuous efforts to develop modulators of the Aβ and Tau aggregation process to halt or modify disease progression. A few small-molecule-based inhibitors that target both Aβ and Tau pathology have been reported. Here, we report the screening of a targeted library of small molecules to modulate Aβ and Tau aggregation together with their in vitro, in silico and cellular studies. In vitro ThT fluorescence assay, dot blot assay, gel electrophoresis and transmission electron microscopy (TEM) results have shown that thiophene-based lead molecules effectively modulate Aβ aggregation and inhibit Tau aggregation. In silico studies performed by employing molecular docking, molecular dynamics and binding-free energy calculations have helped in understanding the mechanism of interaction of the lead thiophene compounds with Aβ and Tau fibril targets. In cellulo studies revealed that the lead candidate is biocompatible and effectively ameliorates neuronal cells from Aβ and Tau-mediated amyloid toxicity.
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Affiliation(s)
- Madhu Ramesh
- Bioorganic Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bengaluru, 560064, Karnataka, India
| | - Anand Acharya
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bengaluru, 560064, Karnataka, India
| | - N Arul Murugan
- Department of Computer Science, School of Electrical Engineering and Computer Science, KTH Royal Institute of Technology, 10044, Stockholm, Sweden
| | - Hiriyakkanavar Ila
- New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bengaluru, 560064, Karnataka, India
| | - Thimmaiah Govindaraju
- Bioorganic Chemistry Laboratory, New Chemistry Unit, Jawaharlal Nehru Centre for Advanced Scientific Research, Jakkur P.O., Bengaluru, 560064, Karnataka, India
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2
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Cardoza S, Shrivash MK, Das P, Tandon V. Strategic Advances in Sequential C-Arylations of Heteroarenes. J Org Chem 2020; 86:1330-1356. [PMID: 33356264 DOI: 10.1021/acs.joc.0c02151] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Sequence-specific C-arylation strategies have important applications in medicinal and material research. These strategies allow C-C bond formations in a regioselective manner to synthesize large molecular libraries for studying structure-activity profiles. The past decade has seen the development of single C-C bond forming reactions using various transition-metal catalysts, cryogenic metalation strategies, and metal-free methods. Sequential arylations of heterocycles allow for the formation of multiaryl derivatives and are a preferred choice over de novo synthetic routes. This perspective sheds light on recent strategic advances to develop various sequential synthetic routes for the multiarylation of heteroarenes. This perspective addresses many challenges in optimizing sequential routes with respect to catalysts, reaction parameters, and various strategies adopted to obtain diversely arylated products.
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Affiliation(s)
- Savio Cardoza
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067, India
| | - Manoj Kumar Shrivash
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067, India.,Department of Applied Sciences, Indian Institute of Information Technology, Allahabad 211012, India
| | - Parthasarathi Das
- Department of Chemistry, Indian Institute of Technology (ISM), Dhanbad 826004, India
| | - Vibha Tandon
- Special Centre for Molecular Medicine, Jawaharlal Nehru University, New Delhi 110067, India
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3
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Kaffy J, Berardet C, Mathieu L, Legrand B, Taverna M, Halgand F, Van Der Rest G, Maillard LT, Ongeri S. Helical γ‐Peptide Foldamers as Dual Inhibitors of Amyloid‐β Peptide and Islet Amyloid Polypeptide Oligomerization and Fibrillization. Chemistry 2020; 26:14612-14622. [DOI: 10.1002/chem.202001716] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 05/28/2020] [Indexed: 01/08/2023]
Affiliation(s)
- Julia Kaffy
- Université Paris-Saclay CNRS BioCIS 92290 Châtenay-Malabry France
| | - Corentin Berardet
- Université Paris-Saclay CNRS BioCIS 92290 Châtenay-Malabry France
- Université Paris Saclay CNRS Institut Galien de Paris Sud 92290 Châtenay-Malabry France
| | - Loïc Mathieu
- Institut des Biomolécules Max Mousseron UMR 5247 CNRS Université de Montpellier-CNRS-ENSCM, UMR 5247 UFR des Sciences Pharmaceutiques et Biologiques 15 Avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Baptiste Legrand
- Institut des Biomolécules Max Mousseron UMR 5247 CNRS Université de Montpellier-CNRS-ENSCM, UMR 5247 UFR des Sciences Pharmaceutiques et Biologiques 15 Avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Myriam Taverna
- Université Paris Saclay CNRS Institut Galien de Paris Sud 92290 Châtenay-Malabry France
- Institut Universitaire de France 1, rue Descartes 75231 Paris Cedex 05 France
| | - Frédéric Halgand
- Université Paris-Saclay CNRS Institut de Chimie Physique 91405 Orsay France
| | | | - Ludovic T. Maillard
- Institut des Biomolécules Max Mousseron UMR 5247 CNRS Université de Montpellier-CNRS-ENSCM, UMR 5247 UFR des Sciences Pharmaceutiques et Biologiques 15 Avenue Charles Flahault 34093 Montpellier Cedex 5 France
| | - Sandrine Ongeri
- Université Paris-Saclay CNRS BioCIS 92290 Châtenay-Malabry France
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4
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Messina C, Douglas LZ, Liu JT, Forgione P. Successive Pd‐Catalyzed Decarboxylative Cross‐Couplings for the Modular Synthesis of Non‐Symmetric Di‐Aryl‐Substituted Thiophenes. European J Org Chem 2020. [DOI: 10.1002/ejoc.202000780] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Cynthia Messina
- Department of Chemistry and Biochemistry Concordia University 7141 Sherbrooke Street West H4B 1R6 Montreal Quebec Canada
- Centre in Green Chemistry and Catalysis 801 Sherbrooke Street West H3A 0B8 Montreal Quebec Canada
| | - Liam Z. Douglas
- Department of Chemistry and Biochemistry Concordia University 7141 Sherbrooke Street West H4B 1R6 Montreal Quebec Canada
| | - Jiang Tian Liu
- Department of Chemistry and Biochemistry Concordia University 7141 Sherbrooke Street West H4B 1R6 Montreal Quebec Canada
- Centre in Green Chemistry and Catalysis 801 Sherbrooke Street West H3A 0B8 Montreal Quebec Canada
| | - Pat Forgione
- Department of Chemistry and Biochemistry Concordia University 7141 Sherbrooke Street West H4B 1R6 Montreal Quebec Canada
- Centre in Green Chemistry and Catalysis 801 Sherbrooke Street West H3A 0B8 Montreal Quebec Canada
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5
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Liu JT, Hase H, Taylor S, Salzmann I, Forgione P. Approaching the Integer‐Charge Transfer Regime in Molecularly Doped Oligothiophenes by Efficient Decarboxylative Cross‐Coupling. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.201914458] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Jiang Tian Liu
- Department of Chemistry and Biochemistry Concordia University 7141 rue Sherbrooke O. Montréal QC H4B 1R6 Canada
| | - Hannes Hase
- Department of Physics Concordia University 7141 rue Sherbrooke O. Montréal QC H4B 1R6 Canada
| | - Sarah Taylor
- Department of Chemistry and Biochemistry Concordia University 7141 rue Sherbrooke O. Montréal QC H4B 1R6 Canada
| | - Ingo Salzmann
- Department of Chemistry and Biochemistry Concordia University 7141 rue Sherbrooke O. Montréal QC H4B 1R6 Canada
- Department of Physics Concordia University 7141 rue Sherbrooke O. Montréal QC H4B 1R6 Canada
- Centre for Research in Molecular Modeling (CERMM) Centre for NanoScience Research (CeNSR) Concordia University 7141 rue Sherbrooke O. Montreal QC H4B 1R6 Canada
| | - Pat Forgione
- Department of Chemistry and Biochemistry Concordia University 7141 rue Sherbrooke O. Montréal QC H4B 1R6 Canada
- Center for Green Chemistry and Catalysis McGill University 801 rue Sherbrooke O. Montréal QC H3A 0B8 Canada
- Centre for Research in Molecular Modeling (CERMM) Centre for NanoScience Research (CeNSR) Concordia University 7141 rue Sherbrooke O. Montreal QC H4B 1R6 Canada
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6
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He Y, Lou J, Zhou YG, Yu Z. ZnCl 2 -Catalyzed [4+1] Annulation of Alkylthio-Substituted Enaminones and Enaminothiones with Sulfur Ylides. Chemistry 2020; 26:4941-4946. [PMID: 31943441 DOI: 10.1002/chem.201905483] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 01/04/2020] [Indexed: 11/09/2022]
Abstract
Concise construction of furan and thiophene units has played an important role in the synthesis of potentially bioactive compounds and functional materials. Herein, an efficient Lewis acid ZnCl2 catalyzed [4+1] annulation of alkylthio-substituted enaminones is reported, that is, α-oxo ketene N,S-acetals with sulfur ylides to afford 2-acyl-3-aminofuran derivatives. In a similar fashion, [4+1] annulation of the corresponding enaminothiones, that is, α-thioxo ketene N,S-acetals, with sulfur ylides efficiently proceeded to give multisubstituted 3-aminothiophenes. This method features wide substrate scopes as well as broad functional group tolerance, offering a concise route to highly functionalized furans and thiophenes.
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Affiliation(s)
- Yuan He
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Jiang Lou
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P. R. China.,University of Chinese Academy of Sciences, Beijing, 100049, P. R. China
| | - Yong-Gui Zhou
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P. R. China
| | - Zhengkun Yu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, 116023, P. R. China.,State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai, 200032, P. R. China
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7
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Liu JT, Hase H, Taylor S, Salzmann I, Forgione P. Approaching the Integer-Charge Transfer Regime in Molecularly Doped Oligothiophenes by Efficient Decarboxylative Cross-Coupling. Angew Chem Int Ed Engl 2020; 59:7146-7153. [PMID: 31961982 DOI: 10.1002/anie.201914458] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Indexed: 01/08/2023]
Abstract
A library of symmetrical linear oligothiophene was prepared employing decarboxylative cross-coupling reaction as the key transformation. Thiophene potassium carboxylate salts were used as cross-coupling partners without the need of co-catalyst, base, or additives. This method demonstrates complete chemoselectivity and is a comprehensive greener approach compared to the existing methods. The modularity of this approach is demonstrated with the preparation of discreet oligothiophenes with up to 10 thiophene repeat units. Symmetrical oligothiophenes are prototypical organic semiconductors where their molecular electrical doping as a function of the chain length can be assessed spectroscopically. An oligothiophene critical length for integer charge transfer was observed to be 10 thiophene units, highlighting the potential use of discrete oligothiophenes as doped conduction or injection layers in organic electronics applications.
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Affiliation(s)
- Jiang Tian Liu
- Department of Chemistry and Biochemistry, Concordia University, 7141 rue Sherbrooke O., Montréal, QC, H4B 1R6, Canada
| | - Hannes Hase
- Department of Physics, Concordia University, 7141 rue Sherbrooke O., Montréal, QC, H4B 1R6, Canada
| | - Sarah Taylor
- Department of Chemistry and Biochemistry, Concordia University, 7141 rue Sherbrooke O., Montréal, QC, H4B 1R6, Canada
| | - Ingo Salzmann
- Department of Chemistry and Biochemistry, Concordia University, 7141 rue Sherbrooke O., Montréal, QC, H4B 1R6, Canada.,Department of Physics, Concordia University, 7141 rue Sherbrooke O., Montréal, QC, H4B 1R6, Canada.,Centre for Research in Molecular Modeling (CERMM), Centre for NanoScience Research (CeNSR), Concordia University, 7141 rue Sherbrooke O., Montreal, QC, H4B 1R6, Canada
| | - Pat Forgione
- Department of Chemistry and Biochemistry, Concordia University, 7141 rue Sherbrooke O., Montréal, QC, H4B 1R6, Canada.,Center for Green Chemistry and Catalysis, McGill University, 801 rue Sherbrooke O., Montréal, QC, H3A 0B8, Canada.,Centre for Research in Molecular Modeling (CERMM), Centre for NanoScience Research (CeNSR), Concordia University, 7141 rue Sherbrooke O., Montreal, QC, H4B 1R6, Canada
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8
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A. Ismail M, M. El-Sayed W, Shaaban S, A. Abdelwahab G, S. Hamama W. A Review of Cationic Arylfurans and Their Isosteres: Synthesis and Biological Importance. CURR ORG CHEM 2020. [DOI: 10.2174/1385272823666191029114830] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
The present study provides an overview of the chemistry and biological importance
of the cationic chalcophene derivatives (furans, thiophenes and selenophenes). The
summarized literature survey includes synthetic methods, reactivity and biological activities
of aryl/hetarylchalcophenes that have been reported mainly from 2001 to 2019 focusing
on monochalcophenes. A discussion demonstrating the proposed mechanisms of some
interesting synthetic routes and linking structure features to biological activities is presented.
These classes of compounds including cationic chalcophenes possess antiproliferative,
antimicrobial and antiprotozoal activities. This review highlights recent advances
for arylchalcophene derivatives and may contribute to the design and structure optimization
of new chalcophene derivatives in the future.
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Affiliation(s)
- Mohamed A. Ismail
- Department of Chemistry, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
| | - Wael M. El-Sayed
- Department of Zoology, Faculty of Science, University of Ain Shams, Abbassia 11566, Cairo, Egypt
| | - Saad Shaaban
- Department of Chemistry, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
| | - Ghada A. Abdelwahab
- Department of Chemistry, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
| | - Wafaa S. Hamama
- Department of Chemistry, Faculty of Science, Mansoura University, Mansoura 35516, Egypt
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9
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He Y, Lou J, Wu P, Zhou YG, Yu Z. Copper-Catalyzed Annulative Coupling of S,S-Disubstituted Enones with Diazo Compounds to Access Highly Functionalized Thiophene Derivatives. J Org Chem 2019; 85:1044-1053. [DOI: 10.1021/acs.joc.9b02982] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Affiliation(s)
- Yuan He
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Jiang Lou
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Ping Wu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Yong-Gui Zhou
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
| | - Zhengkun Yu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
- State Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Road, Shanghai 200032, People’s Republic of China
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10
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Yang S, Cheng R, Zhao T, Luo A, Lan J, You J. Rhodium-Catalyzed C–H/C–H Cross Coupling of Benzylthioethers or Benzylamines with Thiophenes Enabled by Flexible Directing Groups. Org Lett 2019; 21:5086-5090. [DOI: 10.1021/acs.orglett.9b01679] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shiping Yang
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
| | - Rui Cheng
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
| | - Tingxing Zhao
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
| | - Anping Luo
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
| | - Jingbo Lan
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
| | - Jingsong You
- Key Laboratory of Green Chemistry and Technology of Ministry of Education, College of Chemistry, Sichuan University, 29 Wangjiang Road, Chengdu 610064, P.R. China
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11
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Abd el hameid MK, Mohammed MR. Design, synthesis, and cytotoxicity screening of 5-aryl-3-(2-(pyrrolyl) thiophenyl)-1, 2, 4-oxadiazoles as potential antitumor molecules on breast cancer MCF-7 cells. Bioorg Chem 2019; 86:609-623. [DOI: 10.1016/j.bioorg.2019.01.067] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2018] [Revised: 01/09/2019] [Accepted: 01/30/2019] [Indexed: 11/28/2022]
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12
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Synthesis and identification of novel pyridazinylpyrazolone based diazo compounds as inhibitors of human islet amyloid polypeptide aggregation. Bioorg Chem 2019; 84:339-346. [DOI: 10.1016/j.bioorg.2018.11.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Revised: 11/17/2018] [Accepted: 11/24/2018] [Indexed: 02/06/2023]
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13
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He Y, Lou J, Wu K, Wang H, Yu Z. Copper-Catalyzed Radical C–C Bond Cleavage and [4+1] Annulation Cascade of Cycloketone Oxime Esters with Enaminothiones. J Org Chem 2019; 84:2178-2190. [DOI: 10.1021/acs.joc.8b03175] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Yuan He
- Chinese Academy of Sciences, Dalian Institute of Chemical Physics, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Jiang Lou
- Chinese Academy of Sciences, Dalian Institute of Chemical Physics, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
- University of Chinese Academy of Sciences, Beijing 100049, People’s Republic of China
| | - Kaikai Wu
- Chinese Academy of Sciences, Dalian Institute of Chemical Physics, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
| | - Hongmei Wang
- State Key Laboratory of NBC Protection for Civilian, Beijing 102205, People’s Republic of China
| | - Zhengkun Yu
- Chinese Academy of Sciences, Dalian Institute of Chemical Physics, 457 Zhongshan Road, Dalian 116023, People’s Republic of China
- Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, State Key Laboratory of Organometallic Chemistry, 354 Fenglin Road, Shanghai 200032, People’s Republic of China
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14
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Abd El Hameid MK. Design, Synthesis, and Screening of 5-Aryl-3-(2-(pyrrolyl)thiophenyl)-1,2,4-oxadiazoles as Potential Antitumor Molecules on Breast Cancer MCF-7 Cell Line. Chem Pharm Bull (Tokyo) 2018; 66:1181-1195. [PMID: 30298827 DOI: 10.1248/cpb.c18-00636] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The work reported the design and cytotoxic screening of synthetic small molecules: carbonitriles 3a-c, carboximidamides 4a-c, and oxadiazoles 5-19 as antitumor molecules. Molecules 4c, 9, 12, and 14 show promising cytotoxicity profiles against two cell lines higher than prodigiosin (PG). The results of topoisomerase enzyme inhibition assay show that carboximidamide 4c and oxadiazole 14 display potent inhibitory activity in nano-molar concentration higher than PG. In addition, carboximidamide 4c and oxadiazoles 9, 12, and 14 exhibit antiproliferative activities over MCF-7 cells by cell cycle arrest at G1 phase and apoptosis inducing activity by increasing cell population percentages at pre G1 and G2/M phases as shown by DNA-flow cytometry assay and annexin V analysis. Moreover, measurement of p53 and cell death mediators, show that carboximidamide 4c and oxadiazoles 9, 12, and 14 significantly up-regulate p53, Puma and Bax/Bcl-2 ratio levels. Subsequently, pro-apoptotic activities are confirmed by active caspase 3/7 percentages green fluorescence assay.
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15
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IAPP in type II diabetes: Basic research on structure, molecular interactions, and disease mechanisms suggests potential intervention strategies. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2018. [DOI: 10.1016/j.bbamem.2018.02.020] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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16
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Toyota S, Nishiuchi M, Iwata T, Yamauchi T, Iwanaga T, Hasegawa M. Synthesis, structures, and properties of 2,5-dianthrylthiophene derivatives. CAN J CHEM 2017. [DOI: 10.1139/cjc-2016-0391] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The title thiophene derivatives bearing two 9-, 1-, or 2-anthryl groups were synthesized by cyclization of the corresponding 1,3-diynes with sodium sulfide or by Suzuki–Miyaura coupling. X-ray analysis and DFT calculations revealed that the molecules adopt nonplanar conformations depending on the steric demand of the anthryl groups. The dihedral angles between the arene units are an important contributor to the photophysical properties in the electronic spectra as well as the electrochemical data.
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Affiliation(s)
- Shinji Toyota
- Department of Chemistry, School of Science, Tokyo Institute of Technology, 2-12-1 Ookayama, Meguro-ku, Tokyo 152-8551, Japan
| | - Mai Nishiuchi
- Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1 Ridaicho, Kita-ku, Okayama 700-0005, Japan
| | - Taisei Iwata
- Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1 Ridaicho, Kita-ku, Okayama 700-0005, Japan
| | - Tomokazu Yamauchi
- Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1 Ridaicho, Kita-ku, Okayama 700-0005, Japan
| | - Tetsuo Iwanaga
- Department of Chemistry, Faculty of Science, Okayama University of Science, 1-1 Ridaicho, Kita-ku, Okayama 700-0005, Japan
| | - Masashi Hasegawa
- Department of Chemistry, School of Science, Kitasato University, 1-15-1 Kitasato, Minami-ku, Sagamihara 252-0373, Japan
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17
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Profit AA, Vedad J, Desamero RZB. Peptide Conjugates of Benzene Carboxylic Acids as Agonists and Antagonists of Amylin Aggregation. Bioconjug Chem 2017; 28:666-677. [PMID: 28071890 DOI: 10.1021/acs.bioconjchem.6b00732] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Human islet amyloid polypeptide (hIAPP), also known as amylin, is a 37 residue peptide hormone that is stored and co-secreted with insulin. hIAPP plays a pivotal role in type 2 diabetes and is the major component of amyloid deposits found in the pancreas of patients afflicted with the disease. The self-assembly of hIAPP and the formation of amyloid is linked to the death of insulin producing β-cells. Recent findings suggest that soluble hIAPP oligomers are the cytotoxic species responsible for β-cell loss whereas amyloid fibrils themselves may indeed be innocuous. Potential avenues of therapeutic intervention include the development of compounds that prevent hIAPP self-assembly as well as those that reduce or eliminate lag time and rapidly accelerate the formation of amyloid fibrils. Both of these approaches minimize temporal exposure to soluble cytotoxic hIAPP oligomers. Toward this end our laboratory has pursued an electrostatic repulsion approach to the development of potential inhibitors and modulators of hIAPP self-assembly. Peptide conjugates were constructed in which benzene carboxylic acids of varying charge were employed as electrostatic disrupting elements and appended to the N-terminal of the hIAPP22-29 (NFGAILSS) self-recognition sequence. The self-assembly kinetics of conjugates were characterized by turbidity measurements and the structure of aggregates probed by Raman and CD spectroscopy while the morphology was assessed using transmission electron microscopy. Several benzene carboxylic acid peptide conjugates failed to self-assemble and some were found to inhibit the aggregation of full-length amylin while others served to enhance the rate of amyloid formation and/or increase the yield of amyloid produced. Studies reveal that the geometric display of free carboxylates on the benzene ring of the conjugates plays an important role in the activity of conjugates. In addition, a number of free benzene carboxylic acids were found to modulate amylin self-assembly on their own. The results of these investigations confirm the viability of the electrostatic repulsion approach to the modulation of amyloid formation and may aid the design and development of potential therapeutic agents.
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Affiliation(s)
- Adam A Profit
- Department of Chemistry, York College and The Institute for Macromolecular Assemblies , Jamaica, New York 11451, United States.,Ph.D. Programs in Chemistry and Biochemistry, The Graduate Center of the City University of New York , New York, New York 10016, United States
| | - Jayson Vedad
- Department of Chemistry, York College and The Institute for Macromolecular Assemblies , Jamaica, New York 11451, United States.,Ph.D. Programs in Chemistry and Biochemistry, The Graduate Center of the City University of New York , New York, New York 10016, United States
| | - Ruel Z B Desamero
- Department of Chemistry, York College and The Institute for Macromolecular Assemblies , Jamaica, New York 11451, United States.,Ph.D. Programs in Chemistry and Biochemistry, The Graduate Center of the City University of New York , New York, New York 10016, United States
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18
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Rajkumar V, Naveen, Babu SA. Palladium(II)-Promoted Directing Group-Enabled Regioselective C-H Arylation of The C-3 Position of 2- or 3-(Aminoalkyl)-Thiophene and Furfurylamine Derivatives. ChemistrySelect 2016. [DOI: 10.1002/slct.201600296] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Vadla Rajkumar
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali; Manauli P.O. Punjab 140306 India
| | - Naveen
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali; Manauli P.O. Punjab 140306 India
| | - Srinivasarao Arulananda Babu
- Department of Chemical Sciences; Indian Institute of Science Education and Research (IISER) Mohali, Knowledge City, Sector 81, SAS Nagar, Mohali; Manauli P.O. Punjab 140306 India
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19
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Rossi R, Lessi M, Manzini C, Marianetti G, Bellina F. Achievement of regioselectivity in transition metal-catalyzed direct C–H (hetero)arylation reactions of heteroarenes with one heteroatom through the use of removable protecting/blocking substituents or traceless directing groups. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.02.037] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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20
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Probing the role of λ6 immunoglobulin light chain dimerization in amyloid formation. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2016; 1864:409-18. [PMID: 26802902 DOI: 10.1016/j.bbapap.2016.01.009] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 01/04/2016] [Accepted: 01/05/2016] [Indexed: 01/22/2023]
Abstract
Light chain amyloidosis (AL) is a lethal disease associated with the deposition of misfolded immunoglobulin light chains (LC) as amyloid fibrils in the extracellular space of vital organs. The exact mechanisms of LC self-assembly and the molecular basis leading to cellular and organ failure still remain poorly understood. In this study, we investigated the relationship between the quaternary structure, the stability and the amyloidogenecity of LC variable domain (VL) from the λ6 germline. We observed that the amyloidogenic λ6 Wil and its non-amyloidogenic counterpart Jto dimerize in a concentration-dependent manner and that the dimer affinity is considerably decreased in the presence of a high ionic strength. Our results showed that the dimeric state delays the structural conversion associated with amyloid formation and that the monomer is critical to initiate amyloidogenesis. Thermal and chemical unfolding studies revealed that the dimeric state of VL λ6 has an equivalent stability to the monomer. This indicates that the protective effect of dimerization is not related to thermodynamic stability but, most likely, resides in specific structural features. The toxicity of monomeric Jto and Wil as well as fibrillar aggregates was evaluated on cardiomyoblasts and ThT-negative proteospecies reduced cellular viability when employed at high concentration. This study provides novel insights into the complex process of LC amyloidogenesis and suggests that dimer stabilization constitutes a promising strategy to prevent self-assembly and amyloid deposition.
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21
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Nguyen PT, Sharma R, Rej R, De Carufel CA, Roy R, Bourgault S. Low generation anionic dendrimers modulate islet amyloid polypeptide self-assembly and inhibit pancreatic β-cell toxicity. RSC Adv 2016. [DOI: 10.1039/c6ra15373a] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
Abstract
The self-assembly and cytotoxicity of the amyloidogenic peptide IAPP can be controlled with low generation anionic dendrimers.
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Affiliation(s)
- Phuong T. Nguyen
- Department of Chemistry
- Pharmaqam
- University of Québec in Montreal
- Montreal
- Canada
| | - Rishi Sharma
- Department of Chemistry
- Pharmaqam
- University of Québec in Montreal
- Montreal
- Canada
| | - Rabindra Rej
- Department of Chemistry
- Pharmaqam
- University of Québec in Montreal
- Montreal
- Canada
| | | | - René Roy
- Department of Chemistry
- Pharmaqam
- University of Québec in Montreal
- Montreal
- Canada
| | - Steve Bourgault
- Department of Chemistry
- Pharmaqam
- University of Québec in Montreal
- Montreal
- Canada
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22
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Mariño L, Pauwels K, Casasnovas R, Sanchis P, Vilanova B, Muñoz F, Donoso J, Adrover M. Ortho-methylated 3-hydroxypyridines hinder hen egg-white lysozyme fibrillogenesis. Sci Rep 2015; 5:12052. [PMID: 26169912 PMCID: PMC4500996 DOI: 10.1038/srep12052] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 06/16/2015] [Indexed: 12/15/2022] Open
Abstract
Protein aggregation with the concomitant formation of amyloid fibrils is related to several neurodegenerative diseases, but also to non-neuropathic amyloidogenic diseases and non-neurophatic systemic amyloidosis. Lysozyme is the protein involved in the latter, and it is widely used as a model system to study the mechanisms underlying fibril formation and its inhibition. Several phenolic compounds have been reported as inhibitors of fibril formation. However, the anti-aggregating capacity of other heteroaromatic compounds has not been studied in any depth. We have screened the capacity of eleven different hydroxypyridines to affect the acid-induced fibrillization of hen lysozyme. Although most of the tested hydroxypyridines alter the fibrillation kinetics of HEWL, only 3-hydroxy-2-methylpyridine, 3-hydroxy-6-methylpyridine and 3-hydroxy-2,6-dimethylpyridine completely abolish fibril formation. Different biophysical techniques and several theoretical approaches are combined to elucidate their mechanism of action. O-methylated 3-hydroxypyridines bind non-cooperatively to two distinct but amyloidogenic regions of monomeric lysozyme. This stabilises the protein structure, as evidenced by enhanced thermal stability, and results in the inhibition of the conformational transition that precedes fibril assembly. Our results point to o-methylated 3-hydroxypyridines as a promising molecular scaffold for the future development of novel fibrillization inhibitors.
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Affiliation(s)
- Laura Mariño
- Institut Universitari d’Investigació en Ciències de la Salut (IUNICS). Departament de Química, Universitat de les Illes Balears, Ctra. Valldemossa km 7.5, E-07122 Palma de Mallorca, Spain
| | - Kris Pauwels
- Structural Biology Brussels, Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussel, Belgium
- VIB Structural Biology Research Centre, Vlaams Instituut voor Biotechnologie, Pleinlaan 2, 1050 Brussel, Belgium
| | - Rodrigo Casasnovas
- Institut Universitari d’Investigació en Ciències de la Salut (IUNICS). Departament de Química, Universitat de les Illes Balears, Ctra. Valldemossa km 7.5, E-07122 Palma de Mallorca, Spain
| | - Pilar Sanchis
- Institut Universitari d’Investigació en Ciències de la Salut (IUNICS). Departament de Química, Universitat de les Illes Balears, Ctra. Valldemossa km 7.5, E-07122 Palma de Mallorca, Spain
| | - Bartolomé Vilanova
- Institut Universitari d’Investigació en Ciències de la Salut (IUNICS). Departament de Química, Universitat de les Illes Balears, Ctra. Valldemossa km 7.5, E-07122 Palma de Mallorca, Spain
| | - Francisco Muñoz
- Institut Universitari d’Investigació en Ciències de la Salut (IUNICS). Departament de Química, Universitat de les Illes Balears, Ctra. Valldemossa km 7.5, E-07122 Palma de Mallorca, Spain
| | - Josefa Donoso
- Institut Universitari d’Investigació en Ciències de la Salut (IUNICS). Departament de Química, Universitat de les Illes Balears, Ctra. Valldemossa km 7.5, E-07122 Palma de Mallorca, Spain
| | - Miquel Adrover
- Institut Universitari d’Investigació en Ciències de la Salut (IUNICS). Departament de Química, Universitat de les Illes Balears, Ctra. Valldemossa km 7.5, E-07122 Palma de Mallorca, Spain
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23
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Padmavathi R, Sankar R, Gopalakrishnan B, Parella R, Babu SA. Pd(OAc)2/AgOAc Catalytic System Based Bidentate Ligand Directed Regiocontrolled C-H Arylation and Alkylation of the C-3 Position of Thiophene- and Furan-2-carboxamides. European J Org Chem 2015. [DOI: 10.1002/ejoc.201500249] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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24
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Moon H, Lim HS. Synthesis and screening of small-molecule α-helix mimetic libraries targeting protein–protein interactions. Curr Opin Chem Biol 2015; 24:38-47. [DOI: 10.1016/j.cbpa.2014.10.023] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2014] [Revised: 10/27/2014] [Accepted: 10/28/2014] [Indexed: 12/11/2022]
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25
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Nguyen PT, Andraka N, De Carufel CA, Bourgault S. Mechanistic Contributions of Biological Cofactors in Islet Amyloid Polypeptide Amyloidogenesis. J Diabetes Res 2015; 2015:515307. [PMID: 26576436 PMCID: PMC4630397 DOI: 10.1155/2015/515307] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Revised: 01/26/2015] [Accepted: 02/09/2015] [Indexed: 01/24/2023] Open
Abstract
Type II diabetes mellitus is associated with the deposition of fibrillar aggregates in pancreatic islets. The major protein component of islet amyloids is the glucomodulatory hormone islet amyloid polypeptide (IAPP). Islet amyloid fibrils are virtually always associated with several biomolecules, including apolipoprotein E, metals, glycosaminoglycans, and various lipids. IAPP amyloidogenesis has been originally perceived as a self-assembly homogeneous process in which the inherent aggregation propensity of the peptide and its local concentration constitute the major driving forces to fibrillization. However, over the last two decades, numerous studies have shown a prominent role of amyloid cofactors in IAPP fibrillogenesis associated with the etiology of type II diabetes. It is increasingly evident that the biochemical microenvironment in which IAPP amyloid formation occurs and the interactions of the polypeptide with various biomolecules not only modulate the rate and extent of aggregation, but could also remodel the amyloidogenesis process as well as the structure, toxicity, and stability of the resulting fibrils.
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Affiliation(s)
- Phuong Trang Nguyen
- Department of Chemistry, Pharmaqam, University of Quebec in Montreal, Montreal, QC, Canada H3C 3P8
- Quebec Network for Research on Protein Function, Structure, and Engineering (PROTEO), Canada
| | - Nagore Andraka
- Department of Chemistry, Pharmaqam, University of Quebec in Montreal, Montreal, QC, Canada H3C 3P8
- Quebec Network for Research on Protein Function, Structure, and Engineering (PROTEO), Canada
- Biophysics Unit (CSIC, UPV/EHU) and Department of Biochemistry and Molecular Biology, Faculty of Science and Technology, University of the Basque Country, 48080 Bilbao, Spain
| | - Carole Anne De Carufel
- Department of Chemistry, Pharmaqam, University of Quebec in Montreal, Montreal, QC, Canada H3C 3P8
- Quebec Network for Research on Protein Function, Structure, and Engineering (PROTEO), Canada
| | - Steve Bourgault
- Department of Chemistry, Pharmaqam, University of Quebec in Montreal, Montreal, QC, Canada H3C 3P8
- Quebec Network for Research on Protein Function, Structure, and Engineering (PROTEO), Canada
- *Steve Bourgault:
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26
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Patil SM, Alexandrescu AT. Charge-Based Inhibitors of Amylin Fibrillization and Toxicity. J Diabetes Res 2015; 2015:946037. [PMID: 26576438 PMCID: PMC4630399 DOI: 10.1155/2015/946037] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Accepted: 12/12/2014] [Indexed: 02/01/2023] Open
Abstract
To test the hypothesis that electrostatic repulsion is an important force opposing amyloid fibril assembly, we designed peptides that substitute strings of positively or negatively charged residues into the sequence of the amyloidogenic hormone amylin, which contributes to type 2 diabetes pathology. Arg-1 and Arg-2 substitute four positively charged arginines for segments that in structural models of amylin fibrils form the end of strand β1 and the beginning of strand β2, respectively. Mem-T substitutes negatively charged aspartates for the peptide segment with the largest avidity for membranes. All three charge-loaded peptides fibrillize poorly on their own and inhibit fibril elongation of WT-amylin at physiological ionic strength. The inhibition of WT-amylin fibril elongation rates is salt-dependent indicating that the analogs act through electrostatic interactions. Arg-1 protects against WT-amylin cytotoxicity towards a MIN6 mouse model of pancreatic β-cells, and Arg-2 protects at higher concentrations, whereas Mem-T has no effect. The most effective variant, Arg-1, inhibits WT-amylin fibril elongation rates with an IC50 of ~1 µM and cytotoxicity with an IC50 of ~50 µM, comparable to other types of fibrillization inhibitors reported in the literature. Taken together, these results suggest that electrostatic interactions can be exploited to develop new types of inhibitors of amyloid fibrillization and toxicity.
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Affiliation(s)
- Sharadrao M. Patil
- Department of Molecular and Cell Biology, University of Connecticut, 91 N. Eagleville Road, Storrs, CT 06269-3125, USA
| | - Andrei T. Alexandrescu
- Department of Molecular and Cell Biology, University of Connecticut, 91 N. Eagleville Road, Storrs, CT 06269-3125, USA
- *Andrei T. Alexandrescu:
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27
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Chen F, Wong NWY, Forgione P. One-Pot Tandem Palladium-Catalyzed Decarboxylative Cross-Coupling and CH Activation Route to Thienoisoquinolines. Adv Synth Catal 2014. [DOI: 10.1002/adsc.201300924] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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