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Tran AT, Tran CV, Le HV, Tran LV, Tran TTP, Tran SV. Design, Synthesis, and Cytotoxic Activity of New Tubulysin Analogues. Synlett 2021. [DOI: 10.1055/s-0041-1737139] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractSynthesis of tubulysin analogues, containing an N-methyl substituent on tubuvaline-amide together with the replacement of either the hydrophobic N-terminal N-methyl pipecolic acid (Mep) or at both N- and C- terminal peptides with available heteroaromatic acids and an unsaturated tubuphenylalanine moiety, respectively, were described. The in vitro cytotoxic activity by SRB assay on five cancer cell lines for sixteen tubulysins was evaluated. Among them, five analogues exhibited strong cytotoxic activities against five human cancer cell lines, including human breast carcinoma (MCF7), human colorectal adenocarcinoma (HT-29), HL-60, SW-480, human lung adenocarcinoma (A459). Interestingly, one analogue showed the strongest cytotoxicity on all five tested cell lines even much higher toxicity than the reference compound ellipticine.
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Affiliation(s)
- Anh Tuan Tran
- University of Science and Technology of Hanoi, Vietnam Academy of Science and Technology
| | - Chien Van Tran
- Institute of Chemistry, Vietnam Academy of Science and Technology
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology
| | - Hai Van Le
- Institute of Chemistry, Vietnam Academy of Science and Technology
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology
| | - Loc Van Tran
- Institute of Chemistry, Vietnam Academy of Science and Technology
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology
| | - Thao Thi Phuong Tran
- Institute of Chemistry, Vietnam Academy of Science and Technology
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology
| | - Sung Van Tran
- Institute of Chemistry, Vietnam Academy of Science and Technology
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Vaid TM, Chalmers DK, Scott DJ, Gooley PR. INPHARMA-Based Determination of Ligand Binding Modes at α 1 -Adrenergic Receptors Explains the Molecular Basis of Subtype Selectivity. Chemistry 2020; 26:11796-11805. [PMID: 32291801 DOI: 10.1002/chem.202000642] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2020] [Revised: 04/02/2020] [Indexed: 01/06/2023]
Abstract
The structural poses of ligands that bind weakly to protein receptors are challenging to define. In this work we have studied ligand interactions with the adrenoreceptor (AR) subtypes, α1A -AR and α1B -AR, which belong to the G protein-coupled receptor (GPCR) superfamily, by employing the solution-based ligand-observed NMR method interligand NOEs for pharmacophore mapping (INPHARMA). A lack of receptor crystal structures and of subtype-selective drugs has hindered the definition of the physiological roles of each subtype and limited drug development. We determined the binding pose of the weakly binding α1A -AR-selective agonist A-61603 relative to an endogenous agonist, epinephrine, at both α1A -AR and α1B -AR. The NMR experimental data were quantitatively compared, by using SpINPHARMA, to the back-calculated spectra based on ligand poses obtained from all-atom molecular dynamics simulations. The results helped mechanistically explain the selectivity of (R)-A-61603 towards α1A -AR, thus demonstrating an approach for targeting subtype selectivity in ARs.
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Affiliation(s)
- Tasneem M Vaid
- Department of Biochemistry and Molecular Biology, University of Melbourne, Parkville, 3010, VIC, Australia.,Bio21 Molecular Science & Biotechnology Institute, University of Melbourne, Parkville, 3010, VIC, Australia.,The Florey Institute of Neuroscience & Mental Health, University of Melbourne, Parkville, 3015, VIC, Australia
| | - David K Chalmers
- Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, 3052, VIC, Australia
| | - Daniel J Scott
- Department of Biochemistry and Molecular Biology, University of Melbourne, Parkville, 3010, VIC, Australia.,The Florey Institute of Neuroscience & Mental Health, University of Melbourne, Parkville, 3015, VIC, Australia
| | - Paul R Gooley
- Department of Biochemistry and Molecular Biology, University of Melbourne, Parkville, 3010, VIC, Australia.,Bio21 Molecular Science & Biotechnology Institute, University of Melbourne, Parkville, 3010, VIC, Australia
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Hoffmann J, Kazmaier U. A straightforward approach towards cyclic photoactivatable tubulysin derivatives. Angew Chem Int Ed Engl 2014; 53:11356-60. [PMID: 25196233 DOI: 10.1002/anie.201405650] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2014] [Revised: 07/28/2014] [Indexed: 01/17/2023]
Abstract
The development of a new photolabile protecting group containing an additional allyl functionality allows the synthesis of cyclic photoactivatable natural products. Cyclization occurs between the allyl moiety in the protecting group and a second double bond in the target molecule by means of ring-closing metathesis. Cyclization should increase the metabolic stability towards proteases. On the other hand, the conformational change should cause diminished biological activity. As illustrated for tubulysin derivatives, cyclic and photoactivatable drug candidates can easily be obtained in only two steps from simple building blocks through Ugi reaction and ring-closing metathesis. The photolabile protecting group is introduced by means of the isocyanide component during the Ugi reaction.
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Affiliation(s)
- Judith Hoffmann
- Institute for Organic Chemistry, Saarland University, P.O. Box 151150, 66041 Saarbrücken (Germany) http://www.uni-saarland.de/fak8/kazmaier
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Hoffmann J, Kazmaier U. Ein einfacher Zugang zu cyclischen photoaktivierbaren Tubulysin-Derivaten. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201405650] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Yang XD, Dong CM, Chen J, Ding YH, Liu Q, Ma XY, Zhang Q, Chen Y. Total Synthesis of Tubulysin U and Its C-4 Epimer. Chem Asian J 2013; 8:1213-22. [DOI: 10.1002/asia.201300051] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2013] [Revised: 02/27/2013] [Indexed: 11/07/2022]
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Burkhart JL, Kazmaier U. A straightforward click-approach towards pretubulysin-analogues. RSC Adv 2012. [DOI: 10.1039/c2ra20191g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
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Conroy T, Guo JT, Linington RG, Hunt NH, Payne RJ. Total Synthesis, Stereochemical Assignment, and Antimalarial Activity of Gallinamide A. Chemistry 2011; 17:13544-52. [DOI: 10.1002/chem.201102538] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2011] [Indexed: 11/08/2022]
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Burkhart JL, Müller R, Kazmaier U. Syntheses and Evaluation of Simplified Pretubulysin Analogues. European J Org Chem 2011. [DOI: 10.1002/ejoc.201100155] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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