1
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Synthesis and evaluation of in vitro bioactivity for polysubstituted N-arylpyrazole derivatives. ARAB J CHEM 2019. [DOI: 10.1016/j.arabjc.2014.12.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
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2
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Tsubamoto M, Le TK, Li M, Watanabe T, Matsumi C, Parvatkar P, Fujii H, Kato N, Sun J, Ohkanda J. A Guanidyl-Based Bivalent Peptidomimetic Inhibits K-Ras Prenylation and Association with c-Raf. Chemistry 2019; 25:13531-13536. [PMID: 31393030 DOI: 10.1002/chem.201903129] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2019] [Revised: 08/07/2019] [Indexed: 01/06/2023]
Abstract
Unusual lipid modification of K-Ras makes Ras-directed cancer therapy a challenging task. Aiming to disrupt electrostatic-driven protein-protein interactions (PPIs) of K-Ras with FTase and GGTase I, a series of bivalent dual inhibitors that recognize the active pocket and the common acidic surface of FTase and GGTase I were designed. The structure-activity-relationship study resulted in 8 b, in which a biphenyl-based peptidomimetic FTI-277 was attached to a guanidyl-containing gallate moiety through an alkyl linker. Cell-based evaluation demonstrated that 8 b exhibited substantial inhibition of K-Ras processing without apparent interference with Rap-1A processing. Fluorescent imaging showed that 8 b disrupts localization of K-Ras to the plasma membrane and impairs interaction with c-Raf, whereas only FTI-277 was found to be inactive. These results suggest that targeting the PPI interface of K-Ras may provide an alternative method of inhibiting K-Ras.
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Affiliation(s)
- Mai Tsubamoto
- The Institute of Scientific Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Toan Khanh Le
- Academic Assembly, Institute of Agriculture, Shinshu University, 8304 Minami-Minowa, Kami-Ina, Nagano, 399-4598, Japan
| | - Minghua Li
- Department of Pharmaceutical Science, University of South Florida, Tampa, Florida, 33612, USA
| | - Taku Watanabe
- Ina Laboratory, Medical & Biological Laboratories, CO., Ltd., Ina, Nagano, 396-0002, Japan
| | - Chiemi Matsumi
- Ina Laboratory, Medical & Biological Laboratories, CO., Ltd., Ina, Nagano, 396-0002, Japan
| | - Prakash Parvatkar
- Institute for Chemical Research, Kyoto University, Gokasho, Uji, Kyoto, 611-0011, Japan
| | - Hiroshi Fujii
- Academic Assembly, Institute of Agriculture, Shinshu University, 8304 Minami-Minowa, Kami-Ina, Nagano, 399-4598, Japan
| | - Nobuo Kato
- The Institute of Scientific Industrial Research, Osaka University, 8-1 Mihogaoka, Ibaraki, Osaka, 567-0047, Japan
| | - Jiazhi Sun
- Department of Pharmaceutical Science, University of South Florida, Tampa, Florida, 33612, USA
| | - Junko Ohkanda
- Academic Assembly, Institute of Agriculture, Shinshu University, 8304 Minami-Minowa, Kami-Ina, Nagano, 399-4598, Japan
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3
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Guggisberg AM, Amthor RE, Odom AR. Isoprenoid biosynthesis in Plasmodium falciparum. EUKARYOTIC CELL 2014; 13:1348-59. [PMID: 25217461 PMCID: PMC4248697 DOI: 10.1128/ec.00160-14] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Malaria kills nearly 1 million people each year, and the protozoan parasite Plasmodium falciparum has become increasingly resistant to current therapies. Isoprenoid synthesis via the methylerythritol phosphate (MEP) pathway represents an attractive target for the development of new antimalarials. The phosphonic acid antibiotic fosmidomycin is a specific inhibitor of isoprenoid synthesis and has been a helpful tool to outline the essential functions of isoprenoid biosynthesis in P. falciparum. Isoprenoids are a large, diverse class of hydrocarbons that function in a variety of essential cellular processes in eukaryotes. In P. falciparum, isoprenoids are used for tRNA isopentenylation and protein prenylation, as well as the synthesis of vitamin E, carotenoids, ubiquinone, and dolichols. Recently, isoprenoid synthesis in P. falciparum has been shown to be regulated by a sugar phosphatase. We outline what is known about isoprenoid function and the regulation of isoprenoid synthesis in P. falciparum, in order to identify valuable directions for future research.
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Affiliation(s)
- Ann M Guggisberg
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Rachel E Amthor
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri, USA
| | - Audrey R Odom
- Department of Pediatrics, Washington University School of Medicine, St. Louis, Missouri, USA Department of Molecular Microbiology, Washington University School of Medicine, St. Louis, Missouri, USA
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4
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Wang LY, Chang EC, Yeh MY, Chung YH, Huang JJ, Wong FF. Synthesis of 1,3,4-Oxadiazole-Based Aromatic and Heterocyclic/Phenylpyrazole Derivatives. HETEROATOM CHEMISTRY 2014. [DOI: 10.1002/hc.21151] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Li-Ya Wang
- The Ph.D. Program for Cancer Biology and Drug Discovery; China Medical University; Taichung Taiwan 40402 Republic of China
- Graduate Institute of Pharmaceutical Chemistry; China Medical University; Taichung Taiwan 40402 Republic of China
| | - En-Chiuan Chang
- Department of Chemistry; National Cheng Kung University; Tainan Taiwan 70101 Republic of China
| | - Mou-Yung Yeh
- Department of Chemistry; National Cheng Kung University; Tainan Taiwan 70101 Republic of China
| | - Yu Hsuan Chung
- Department of Applied Chemistry; National Chiayi University; Chiayi City Taiwan 60004 Republic of China
| | - Jiann-Jyh Huang
- Department of Applied Chemistry; National Chiayi University; Chiayi City Taiwan 60004 Republic of China
| | - Fung Fuh Wong
- Graduate Institute of Pharmaceutical Chemistry; China Medical University; Taichung Taiwan 40402 Republic of China
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5
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Straniero V, Pallavicini M, Chiodini G, Ruggeri P, Fumagalli L, Bolchi C, Corsini A, Ferri N, Ricci C, Valoti E. Farnesyltransferase inhibitors: CAAX mimetics based on different biaryl scaffolds. Bioorg Med Chem Lett 2014; 24:2924-7. [PMID: 24821376 DOI: 10.1016/j.bmcl.2014.04.078] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2014] [Revised: 04/16/2014] [Accepted: 04/21/2014] [Indexed: 11/28/2022]
Abstract
Mimetics of the C-terminal CAAX tetrapeptide of Ras protein were designed as farnesyltransferase (FTase) inhibitors (FTIs) by replacing AA with o-aryl or o-heteroaryl substituted p-hydroxy- or p-aminobenzoic acid, while maintaining the replacement of C with 1,4-benzodioxan-2-ylmethyl or 2-amino-4-thiazolylacetyl residue as in previous CAAX mimetics. Both FTase inhibition and antiproliferative effect were showed by two thiazole derivatives, namely those with 1-naphthyl (10 and 10a) or 3-furanyl (15 and 15a) in the central spacer, and by the benzodioxane derivative with 2-thienyl (6 and 6a) in the same position. Accumulation of unprenylated RAS was demonstrated in cells incubated with 15a. Consistently with FTIs literature, such results delineate the biaryl scaffold not only as a spacer but also as a sensible area of these mimetic molecules, where modifications at the branching aromatic ring are not indifferent and should be matter of further investigation.
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Affiliation(s)
- Valentina Straniero
- Dipartimento di Scienze Farmaceutiche, Università di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Marco Pallavicini
- Dipartimento di Scienze Farmaceutiche, Università di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Giuseppe Chiodini
- Dipartimento di Scienze Farmaceutiche, Università di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Paola Ruggeri
- Dipartimento di Scienze Farmaceutiche, Università di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Laura Fumagalli
- Dipartimento di Scienze Farmaceutiche, Università di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Cristiano Bolchi
- Dipartimento di Scienze Farmaceutiche, Università di Milano, via Mangiagalli 25, I-20133 Milano, Italy
| | - Alberto Corsini
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università di Milano, via Balzaretti 9, I-20133 Milano, Italy
| | - Nicola Ferri
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università di Milano, via Balzaretti 9, I-20133 Milano, Italy; Multimedica IRCCS, Milano, Italy
| | - Chiara Ricci
- Dipartimento di Scienze Farmacologiche e Biomolecolari, Università di Milano, via Balzaretti 9, I-20133 Milano, Italy
| | - Ermanno Valoti
- Dipartimento di Scienze Farmaceutiche, Università di Milano, via Mangiagalli 25, I-20133 Milano, Italy.
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6
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Machida S, Tsubamoto M, Kato N, Harada K, Ohkanda J. Peptidomimetic modification improves cell permeation of bivalent farnesyltransferase inhibitors. Bioorg Med Chem 2013; 21:4004-10. [DOI: 10.1016/j.bmc.2012.09.061] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2012] [Revised: 07/28/2012] [Accepted: 09/21/2012] [Indexed: 10/27/2022]
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7
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Kang CW, Sun Y, Del Valle JR. Substituted imidazo[1,2-a]pyridines as β-strand peptidomimetics. Org Lett 2012; 14:6162-5. [PMID: 23210770 DOI: 10.1021/ol302850n] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
New conformationally extended dipeptide surrogates based on an imidazo[1,2-a]pyridine scaffold are described. Efficient synthesis and incorporation into host peptides affords structures with native side-chain functionality and hydrogen bonding elements on one face of the backbone. Structural analysis by NMR suggests that model peptidomimetics adopt a β-strand-like conformation in solution.
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Affiliation(s)
- Chang Won Kang
- Drug Discovery Department, H. Lee Moffitt Cancer Center and Research Institute, Tampa, Florida 33612, United States
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8
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Ngo TH, Berndt H, Lentz D, Reissig HU. Linear and Cyclic Amides with a Thiophene Backbone: Ultrasound-Promoted Synthesis and Crystal Structures. J Org Chem 2012; 77:9676-83. [DOI: 10.1021/jo3017605] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Affiliation(s)
- Thien H. Ngo
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, D-14195
Berlin, Germany
| | - Hülya Berndt
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, D-14195
Berlin, Germany
| | - Dieter Lentz
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, D-14195
Berlin, Germany
| | - Hans-Ulrich Reissig
- Institut
für Chemie und Biochemie, Freie Universität Berlin, Takustrasse 3, D-14195
Berlin, Germany
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9
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Lethu S, Bosc D, Mouray E, Grellier P, Dubois J. New protein farnesyltransferase inhibitors in the 3-arylthiophene 2-carboxylic acid series: diversification of the aryl moiety by solid-phase synthesis. J Enzyme Inhib Med Chem 2012; 28:163-71. [DOI: 10.3109/14756366.2011.643302] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Sébastien Lethu
- Institut de Chimie des Substances Naturelles, CNRS, Centre de Recherche de Gif,
Gif sur Yvette, France
| | - Damien Bosc
- Institut de Chimie des Substances Naturelles, CNRS, Centre de Recherche de Gif,
Gif sur Yvette, France
| | | | | | - Joëlle Dubois
- Institut de Chimie des Substances Naturelles, CNRS, Centre de Recherche de Gif,
Gif sur Yvette, France
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10
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Fletcher S, Keaney EP, Cummings CG, Blaskovich MA, Hast MA, Glenn MP, Chang SY, Bucher CJ, Floyd RJ, Katt WP, Gelb MH, Van Voorhis WC, Beese LS, Sebti SM, Hamilton AD. Structure-based design and synthesis of potent, ethylenediamine-based, mammalian farnesyltransferase inhibitors as anticancer agents. J Med Chem 2010; 53:6867-88. [PMID: 20822181 DOI: 10.1021/jm1001748] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A potent class of anticancer, human farnesyltransferase (hFTase) inhibitors has been identified by "piggy-backing" on potent, antimalarial inhibitors of Plasmodium falciparum farnesyltransferase (PfFTase). On the basis of a 4-fold substituted ethylenediamine scaffold, the inhibitors are structurally simple and readily derivatized, facilitating the extensive structure-activity relationship (SAR) study reported herein. Our most potent inhibitor is compound 1f, which exhibited an in vitro hFTase IC(50) value of 25 nM and a whole cell H-Ras processing IC(50) value of 90 nM. Moreover, it is noteworthy that several of our inhibitors proved highly selective for hFTase (up to 333-fold) over the related prenyltransferase enzyme geranylgeranyltransferase-I (GGTase-I). A crystal structure of inhibitor 1a co-crystallized with farnesyl pyrophosphate (FPP) in the active site of rat FTase illustrates that the para-benzonitrile moiety of 1a is stabilized by a π-π stacking interaction with the Y361β residue, suggesting a structural explanation for the observed importance of this component of our inhibitors.
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Affiliation(s)
- Steven Fletcher
- Department of Chemistry, Yale University, 225 Prospect Street, New Haven, Connecticut 06511, USA
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11
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Ranatunga S, Liyanage W, Del Valle JR. Synthesis and conformational analysis of bicyclic extended dipeptide surrogates. J Org Chem 2010; 75:5113-25. [PMID: 20593836 PMCID: PMC2914495 DOI: 10.1021/jo1008433] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Regio- and diastereoselective reactions of a homoproline enolate enable the synthesis of novel extended dipeptide surrogates. Bicyclic carbamate 9 and fused beta-lactam scaffold 11 were prepared from L-pyroglutamic acid via substrate-controlled electrophilic azidation. Synthesis of orthogonally protected hexahydropyrrolizine, hexahydropyrrolizinone, and hexahydropyrroloazepinone dipeptide surrogates relied on allylation of proline derivative 5, followed by Curtius rearrangement to introduce the N-terminal carbamate group. A total of six azabicycloalkane derivatives were evaluated for conformational mimicry of extended dipeptides by a combination of X-ray diffraction and molecular modeling. Analysis of putative backbone dihedral angles and N- to C-terminal dipeptide distances indicate that compounds (alpha'S)-14b and 21 approximate the conformation of dipeptides found in beta-sheets, while tripeptide mimic 28 is also highly extended in the solid state. Structural data suggest that ring size and relative stereochemistry have a profound effect on the ability of these scaffolds to act as beta-strand mimetics and should inform the design of related conformational probes.
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12
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Suryadevara PK, Olepu S, Lockman JW, Ohkanda J, Karimi M, Verlinde CLMJ, Kraus JM, Schoepe J, Van Voorhis WC, Hamilton AD, Buckner FS, Gelb MH. Structurally simple inhibitors of lanosterol 14alpha-demethylase are efficacious in a rodent model of acute Chagas disease. J Med Chem 2009; 52:3703-15. [PMID: 19463001 DOI: 10.1021/jm900030h] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We report structure-activity studies of a large number of dialkyl imidazoles as inhibitors of Trypanosoma cruzi lanosterol-14alpha-demethylase (L14DM). The compounds have a simple structure compared to posaconazole, another L14DM inhibitor that is an anti-Chagas drug candidate. Several compounds display potency for killing T. cruzi amastigotes in vitro with values of EC(50) in the 0.4-10 nM range. Two compounds were selected for efficacy studies in a mouse model of acute Chagas disease. At oral doses of 20-50 mg/kg given after establishment of parasite infection, the compounds reduced parasitemia in the blood to undetectable levels, and analysis of remaining parasites by PCR revealed a lack of parasites in the majority of animals. These dialkyl imidazoles are substantially less expensive to produce than posaconazole and are appropriate for further development toward an anti-Chagas disease clinical candidate.
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13
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Simonen M, Ibig-Rehm Y, Hofmann G, Zimmermann J, Albrecht G, Magnier M, Heidinger V, Gabriel D. High-Content Assay to Study Protein Prenylation. ACTA ACUST UNITED AC 2008; 13:456-67. [DOI: 10.1177/1087057108318757] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The mevalonate pathway leads to synthesis of cholesterol and isoprenoid lipids. Prenyltransferases attach the isoprenoid lipids to the C-terminus of several small guanosine triphosphate—binding proteins. The prenyl groups are essential for the biological activity of these proteins. The prenyltransferases and other components of the mevalonate pathway are either present or potential drug targets for cancer, osteoporosis, restenosis, or high serum cholesterol level. Until recently, cellular assays to study protein prenylation have been tedious, low-throughput assays. The authors have developed a high-content imaging-based assay to study protein prenylation. The assay is based on a green fluorescent protein (GFP) reporter, which is tagged with the prenylation motif of human H-Ras. The C-terminus of H-Ras targets GFP to the plasma membrane. When protein prenylation is inhibited, the tagged GFP cannot be localized to plasma membrane but is soluble in the cells. The localization of the GFP reporter can be analyzed in the 96- or 384-well format using automated microscopy and automated image analysis. Information about cell number and nuclear intensity can be obtained from the same images. In compound screening, these readouts provide valuable information about the toxicity of the compounds. The authors have validated their assay using several inhibitors of the mevalonate pathway as well as siRNA against farnesyl pyrophosphate synthase, a critical enzyme in the synthesis of the isoprenoid lipids. ( Journal of Biomolecular Screening 2008:456-467)
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Affiliation(s)
- Marjo Simonen
- Novartis Institutes for BioMedical Research, CH-4002 Basel, Switzerland,
| | - Yvonne Ibig-Rehm
- Novartis Institutes for BioMedical Research, CH-4002 Basel, Switzerland
| | - Gabriele Hofmann
- Novartis Institutes for BioMedical Research, CH-4002 Basel, Switzerland
| | - Johann Zimmermann
- Novartis Institutes for BioMedical Research, CH-4002 Basel, Switzerland
| | | | - Maxime Magnier
- Novartis Institutes for BioMedical Research, CH-4002 Basel, Switzerland
| | - Valerie Heidinger
- Novartis Institutes for BioMedical Research, CH-4002 Basel, Switzerland
| | - Daniela Gabriel
- Novartis Institutes for BioMedical Research, CH-4002 Basel, Switzerland
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14
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Hussain I, Riahi A, Yawer MA, Villinger A, Fischer C, Görls H, Langer P. One-pot synthesis of 6-(thien-2-yl)- and 6-(fur-2-yl)salicylates based on regioselective [3 + 3] cyclocondensations of 1,3-bis(trimethylsilyloxy)-1,3-butadienes. Org Biomol Chem 2008; 6:3542-51. [DOI: 10.1039/b803472a] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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15
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Ohkanda J, Strickland CL, Blaskovich MA, Carrico D, Lockman JW, Vogt A, Bucher CJ, Sun J, Qian Y, Knowles D, Pusateri EE, Sebti SM, Hamilton AD. Structure-based design of imidazole-containing peptidomimetic inhibitors of protein farnesyltransferase. Org Biomol Chem 2006; 4:482-92. [PMID: 16446806 DOI: 10.1039/b508184j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A series of imidazole-containing peptidomimetic PFTase inhibitors and their co-crystal structures bound to PFTase and FPP are reported. The structures reveal that the peptidomimetics adopt a similar conformation to that of the extended CVIM tetrapeptide, with the imidazole group coordinating to the catalytic zinc ion. Both mono- and bis-imidazole-containing derivatives, 13 and 16, showed remarkably high enzyme inhibition activity against PFTase in vitro with IC50 values of 0.86 and 1.7 nM, respectively. The peptidomimetics were also highly selective for PFTase over PGGTase-I both in vitro and in intact cells. In addition, peptidomimetics and were found to suppress tumor growth in nude mouse xenograft models with no gross toxicity at a daily dose of 25 mg kg(-1).
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Affiliation(s)
- Junko Ohkanda
- Department of Chemistry, Yale University, PO Box 208107, New Haven, CT 06520, USA
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16
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17
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An Assessment of Bio-active Conformation of CAAX-based Tetrapeptide in Ras Farnesyltransferase Inhibition. B KOREAN CHEM SOC 2005. [DOI: 10.5012/bkcs.2005.26.2.327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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18
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El Oualid F, Burm BEA, Leroy IM, Cohen LH, van Boom JH, van den Elst H, Overkleeft HS, van der Marel GA, Overhand M. Design, Synthesis, and Evaluation of Su- gar Amino Acid Based Inhibitors of Pro- tein Prenyl Transferases PFT and PGGT-1. J Med Chem 2004; 47:3920-3. [PMID: 15267228 DOI: 10.1021/jm049927q] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Eleven analogues of the C-terminal Ca(1)a(2)X motif found in natural substrates of the prenyl transferases PFT and PGGT-1 were synthesized and evaluated for their inhibition potency and selectivity against PFT and PGGT-1. Replacement of the central dipeptide part a(1)a(2) by a benzylated sugar amino acid resulted in a good and highly selective PFT inhibitor (8, IC(50) = 250 +/- 20 nM). The methyl ester of 8 (13) selectively inhibited protein farnesylation in cultured cells.
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Affiliation(s)
- Farid El Oualid
- Leiden Institute of Chemistry, Gorlaeus Laboratories, Leiden University, P.O. Box 9502, 2300 RA Leiden, The Netherlands
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19
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Ohkanda J, Buckner FS, Lockman JW, Yokoyama K, Carrico D, Eastman R, de Luca-Fradley K, Davies W, Croft SL, Van Voorhis WC, Gelb MH, Sebti SM, Hamilton AD. Design and Synthesis of Peptidomimetic Protein Farnesyltransferase Inhibitors as Anti-Trypanosoma brucei Agents. J Med Chem 2003; 47:432-45. [PMID: 14711313 DOI: 10.1021/jm030236o] [Citation(s) in RCA: 45] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
On the basis of the structure of the CVIM tetrapeptide substrate of mammalian protein farnesyltransferase, a series of imidazole-containing peptidomimetics was designed and synthesized, and their inhibition activity against Trypanosoma brucei protein farnesyltransferase (TbPFT) was evaluated. Peptidomimetics where the 5-position of the imidazole ring was linked to the hydrophobic scaffold showed over 70% inhibition activity at 50 nM in the enzyme assay, whereas the corresponding C-4 regioisomers were less potent. The ester prodrug 23 was found to be a potent inhibitor against cultured Trypanosoma brucei brucei and Trypanosoma brucei rhodesiense cells with ED(50) values of 0.025 and 0.0026 microM, respectively. Furthermore, introducing a second imidazole group into 23 led to 31, which showed the highest inhibition activity against the parasite with an ED(50) of 0.0015 microM. The potency of the TbPFT inhibitors and the cytotoxicity of the corresponding esters to T. brucei cells were shown to be highly correlated. These studies validate TbPFT as a target for the development of novel therapeutics against African sleeping sickness.
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Affiliation(s)
- Junko Ohkanda
- Department of Chemistry, Yale University, PO Box 208107, New Haven, Connecticut 06520, USA
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20
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Singh SK, Ruchelman AL, Li TK, Liu A, Liu LF, LaVoie EJ. Nitro and amino substitution in the D-ring of 5-(2-dimethylaminoethyl)- 2,3-methylenedioxy-5H-dibenzo[c,h][1,6]naphthyridin-6-ones: effect on topoisomerase-I targeting activity and cytotoxicity. J Med Chem 2003; 46:2254-7. [PMID: 12747798 DOI: 10.1021/jm020498a] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
5H-8,9-dimethoxy-5-(2-N,N-dimethylaminoethyl)-2,3-methylenedioxydibenzo[c,h][1,6]naphthyridin-6-one exhibits potent TOP1-targeting activity and pronounced antitumor activity. It was hypothesized that replacement of the two methoxyl groups with a nitro substituent would allow for retention of similar activity. In this study 8-, 9-, and 10-nitro-5H-2,3-methylenedioxy-5-(2-N,N-dimethylaminoethyl)dibenzo[c,h][1,6]naphthyridin-6-one and their amino derivatives were synthesized and assessed for their relative TOP1-targeting activity and cytotoxicity. In the case of both the 8- and 9-nitro analogues, their TOP1-targeting activity and cytotoxicity are greater than that of camptothecin and comparable to that of 5H-8,9-dimethoxy-5-(2-N,N-dimethylaminoethyl)-2,3-methylenedioxydibenzo[c,h][1,6]naphthyridin-6-one.
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Affiliation(s)
- Sudhir K Singh
- Department of Pharmaceutical Chemistry, Rutgers, The State University of New Jersey, Piscataway, New Jersey 08854-8020, USA
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21
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Hamasaki A, Naka H, Tamanoi F, Umezawa K, Otsuka M. A novel metal-chelating inhibitor of protein farnesyltransferase. Bioorg Med Chem Lett 2003; 13:1523-6. [PMID: 12699746 DOI: 10.1016/s0960-894x(03)00183-5] [Citation(s) in RCA: 19] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
A novel metal chelator comprising a 4-(naphthalen-1-yl)pyridine and 2-aminoethanethiol was synthesized. This showed inhibitory activity against human protein farnesyltransferase with IC(50) 1.9 microM, induced morphological change in K-ras-NRK cells at 0.5 microg/mL and showed growth inhibition of K-ras-NRK cells with IC(50) 0.32 microg/mL.
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Affiliation(s)
- Akiyuki Hamasaki
- Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto 862-0973, Japan
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22
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Leung MK, Chou MY, Su YO, Chiang CL, Chen HL, Yang CF, Yang CC, Lin CC, Chen HT. Diphenylamino group as an effective handle to conjugated donor-acceptor polymers through electropolymerization. Org Lett 2003; 5:839-42. [PMID: 12633085 DOI: 10.1021/ol027474i] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
[reaction: see text] The diphenylamino group is an effective handle for electropolymerization to give electron donor-acceptor conjugated polymers. In addition, interesting electrochromic and photoresponsive behavior of 13 has been investigated.
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Affiliation(s)
- Man-Kit Leung
- Department of Chemistry, National Taiwan University, Taipei, Taiwan 106, Republic of China
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23
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Abstract
The first example of tripeptide inhibitors of farnesyltransferase with sub-micromolar inhibition activity was developed based on the fact that CVFM is not a substrate for farnesyltransferase.
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Affiliation(s)
- Hee-Yoon Lee
- Center for Molecular Design and Synthesis, Department of Chemistry and School of Molecular Science(BK21), Korea Advanced Institute of Science and Technology, Daejon 305-701, Republic of Korea.
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24
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Ohkanda J, Lockman JW, Kothare MA, Qian Y, Blaskovich MA, Sebti SM, Hamilton AD. Design and synthesis of potent nonpeptidic farnesyltransferase inhibitors based on a terphenyl scaffold. J Med Chem 2002; 45:177-88. [PMID: 11754590 DOI: 10.1021/jm0103099] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
By modification of key carboxylate, hydrophobic, and zinc-binding groups projected from a sterically restricted terphenyl scaffold, a series of simple and nonpeptide mimetics of the Cys-Val-Ile-Met tetrapeptide substrate of protein farnesyltransferase (FTase) have been designed and synthesized. A crystal structure of 4-nitro-2-phenyl-3'-methoxycarbonylbiphenyl shows that the triphenyl fragment provides a large hydrophobic surface that potentially mimics the hydrophobic side chains of the three terminal residues in the tetrapeptide. 2-Phenyl-3-(N-(1-(4-cyanobenzyl)-1H-imidazol-5-yl)methyl)amino-3'carboxylbiphenyl, in which the free thiol group was replaced with a 1-(4-cyanobenzyl)imidazole group, shows submicromolar inhibition activity against FTase in vitro and inhibits H-Ras processing in whole cells.
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Affiliation(s)
- Junko Ohkanda
- Department of Chemistry, Yale University, P.O. Box 208107, New Haven, Connecticut 06520-8107, USA
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25
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Ohkanda J, Lockman JW, Yokoyama K, Gelb MH, Croft SL, Kendrick H, Harrell MI, Feagin JE, Blaskovich MA, Sebti SM, Hamilton AD. Peptidomimetic inhibitors of protein farnesyltransferase show potent antimalarial activity. Bioorg Med Chem Lett 2001; 11:761-4. [PMID: 11277514 DOI: 10.1016/s0960-894x(01)00055-5] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Malaria continues to represent a very serious health problem in the tropics. The current methods of clinical treatment are showing deficiencies due to the increased incidence of resistance in the parasite. In the present paper we report the design, synthesis, and evaluation of potential antimalarial agents against a novel target, protein farnesyltransferase. We show that the most potent compounds are active against Plasmodium falciparum in vitro at submicromolar concentrations.
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Affiliation(s)
- J Ohkanda
- Department of Chemistry, Yale University, New Haven, CT 06520, USA
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26
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Kotharé MA, Ohkanda J, Lockman JW, Qian Y, Blaskovich MA, Sebti SM, Hamilton AD. Development of a Tripeptide Mimetic Strategy for the Inhibition of Protein Farnesyltransferase. Tetrahedron 2000. [DOI: 10.1016/s0040-4020(00)00890-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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27
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Cermak DM, Wiemer DF, Lewis K, Hohl RJ. 2-(Acyloxy)ethylphosphonate analogues of prenyl pyrophosphates: synthesis and biological characterization. Bioorg Med Chem 2000; 8:2729-37. [PMID: 11131164 DOI: 10.1016/s0968-0896(00)00212-1] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
2-(Acyloxy)ethylphosphonate analogues of geranyl, farnesyl, and geranylgeranyl pyrophosphate have been prepared. Horner-Wadsworth-Emmons condensation of different terpene aldehydes with an unsymmetrical bisphosphonate was the key step in syntheses of the phosphonates bearing alpha,beta-unsaturated acyloxy groups. After preparation of the respective phosphonic acids through reaction with TMSBr, both acids and esters were tested for their effects on DNA synthesis in human-derived myeloid and lymphoid leukemia cell lines. The phosphonate esters varied substantially in their ability to impair proliferation of the different cell lines, but testing against one possible target, farnesyl protein transferase (FPTase), revealed little impact at concentrations ranging up to 10 microM. Because the corresponding 2,3-dihydro compounds showed similar biological activity, conjugate addition would not appear to be involved in the toxicity.
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Affiliation(s)
- D M Cermak
- Department of Chemistry, University of Iowa, Iowa City 52242-1294, USA
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