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Bailey JJ, Wuest M, Wagner M, Bhardwaj A, Wängler C, Wängler B, Valliant JF, Schirrmacher R, Wuest F. Synthesis and Preclinical Evaluation of [ 18F]SiFA-PSMA Inhibitors in a Prostate Cancer Model. J Med Chem 2021; 64:15671-15689. [PMID: 34672630 DOI: 10.1021/acs.jmedchem.1c00812] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Positron emission tomography (PET) imaging of prostate-specific membrane antigen (PSMA) with gallium-68 (68Ga) and fluorine-18 (18F) radiotracers has aroused tremendous interest over the past few years. The use of organosilicon-[18F]fluoride acceptors (SiFA) conjugated to urea-based peptidomimetic PSMA inhibitors provides a "kit-like" multidose synthesis technology. Nine novel 18F-labeled SiFA-bearing PSMA inhibitors with different linker moieties were synthesized and analyzed for their in vitro binding against [125I]I-TAAG-PSMA in LNCaP cells. IC50 values ranged from 58-570 nM. Among all compounds, [18F]SiFA-Asp2-PEG3-PSMA (IC50 = 125 nM) showed the highest tumor uptake in LNCaP tumors (SUV60min 0.73). A substantial increase in molar activity (Am) (from 7.5 ± 0.5 to 86 ± 3 GBq/μmol) led to a significant increase in LNCaP tumor uptake (SUV60min 1.18; Δ 0.45 corresponding to +62%). In vivo blocking with DCFPyL resulted in -32% uptake after 60 min. The SiFA-isotopic exchange chemistry offers a method that is readily adaptable for a "kit-type" labeling procedure and clinical translation.
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Affiliation(s)
- Justin J Bailey
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada
| | - Melinda Wuest
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada
| | - Michael Wagner
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada
| | - Atul Bhardwaj
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada
| | - Carmen Wängler
- Clinic of Radiology and Nuclear Medicine, Biomedical Chemistry and Clinic of Radiology and Nuclear Medicine, Molecular Imaging and Radiochemistry, Medical Faculty Mannheim of Heidelberg University, Theodor-Kutzer-Ufer 1-3, Mannheim 68167, Germany
| | - Bjoern Wängler
- Clinic of Radiology and Nuclear Medicine, Biomedical Chemistry and Clinic of Radiology and Nuclear Medicine, Molecular Imaging and Radiochemistry, Medical Faculty Mannheim of Heidelberg University, Theodor-Kutzer-Ufer 1-3, Mannheim 68167, Germany
| | - John F Valliant
- Department of Chemistry and Chemical Biology, McMaster University, 1280 Main Street, Hamilton, Ontario L8S 4K1, Canada
| | - Ralf Schirrmacher
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada
| | - Frank Wuest
- Department of Oncology, University of Alberta, Cross Cancer Institute, 11560 University Avenue, Edmonton, Alberta T6G 1Z2, Canada
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Morimoto J, Fukuda Y, Kuroda D, Watanabe T, Yoshida F, Asada M, Nakamura T, Senoo A, Nagatoishi S, Tsumoto K, Sando S. A Peptoid with Extended Shape in Water. J Am Chem Soc 2019; 141:14612-14623. [DOI: 10.1021/jacs.9b04371] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Jumpei Morimoto
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Yasuhiro Fukuda
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Daisuke Kuroda
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Takumu Watanabe
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Fumihiko Yoshida
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Mizue Asada
- Department of Materials Molecular Science, Institute for Molecular Science, 38 Nishigo-naka, Myodaiji, Okazaki 444-8585, Japan
| | - Toshikazu Nakamura
- Department of Materials Molecular Science, Institute for Molecular Science, 38 Nishigo-naka, Myodaiji, Okazaki 444-8585, Japan
| | - Akinobu Senoo
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
| | - Satoru Nagatoishi
- Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
| | - Kouhei Tsumoto
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Institute of Medical Science, The University of Tokyo, 4-6-1 Shirokanedai, Minato-ku, Tokyo 108-8639, Japan
| | - Shinsuke Sando
- Department of Chemistry and Biotechnology, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
- Department of Bioengineering, Graduate School of Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-8656, Japan
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3
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Lazor KM, Zhou J, DeMeester KE, D'Ambrosio EA, Grimes CL. Synthesis and Application of Methyl N,O-Hydroxylamine Muramyl Peptides. Chembiochem 2019; 20:1369-1375. [PMID: 30672111 DOI: 10.1002/cbic.201800731] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Indexed: 01/01/2023]
Abstract
The innate immune system's interaction with bacterial cells plays a pivotal role in a variety of human diseases. Carbohydrate units derived from a component of bacterial cell wall, peptidoglycan (PG), are known to stimulate an immune response. Nonetheless, access to modified late-stage peptidoglycan intermediates is limited due to their synthetic complexity. A method to rapidly functionalize PG fragments is needed to better understand the natural host-PG interactions. Here methyl N,O-hydroxylamine linkers are incorporated onto a synthetic PG derivative, muramyl dipeptide (MDP). The modification of MDP maintained the ability to stimulate a nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) immune response dependent on the expression of nucleotide-binding oligomerization domain-containing protein 2 (Nod2). Intrigued by this modification's maintenance of biological activity, several applications were explored. Methyl N,O-hydroxylamine MDP was amendable to N-hydroxylsuccinimide (NHS) chemistry for bioconjugation to fluorophores as well as a self-assembled monolayer for Nod2 surface plasmon resonance analysis. Finally, linker incorporation was applicable to larger PG fragments, both enzymatically generated from Escherichia coli or chemically synthesized. This methodology provides rapid access to PG probes in one step and allows for the installation of a variety of chemical handles to advance the molecular understanding of PG and the innate immune system.
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Affiliation(s)
- Klare M Lazor
- Department of Chemistry and Biochemistry, University of Delaware, 140 Brown Lab, Newark, DE, 19716, USA
| | - Junhui Zhou
- Department of Chemistry and Biochemistry, University of Delaware, 140 Brown Lab, Newark, DE, 19716, USA
| | - Kristen E DeMeester
- Department of Chemistry and Biochemistry, University of Delaware, 140 Brown Lab, Newark, DE, 19716, USA
| | - Elizabeth A D'Ambrosio
- Department of Chemistry and Biochemistry, University of Delaware, 140 Brown Lab, Newark, DE, 19716, USA
| | - Catherine L Grimes
- Department of Chemistry and Biochemistry, University of Delaware, 140 Brown Lab, Newark, DE, 19716, USA.,Department of Biological Sciences, University of Delaware, 140 Brown Lab, Newark, DE, 19716, USA
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Krieger V, Ciglia E, Thoma R, Vasylyeva V, Frieg B, de Sousa Amadeu N, Kurz T, Janiak C, Gohlke H, Hansen FK. α-Aminoxy Peptoids: A Unique Peptoid Backbone with a Preference for cis-Amide Bonds. Chemistry 2017; 23:3699-3707. [PMID: 28090689 DOI: 10.1002/chem.201605100] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2016] [Indexed: 12/13/2022]
Abstract
α-Peptoids, or N-substituted glycine oligomers, are an important class of peptidomimetic foldamers with proteolytic stability. Nevertheless, the presence of cis/trans-amide bond conformers, which contribute to the high flexibility of α-peptoids, is considered as a major drawback. A modified peptoid backbone with an improved control of the amide bond geometry could therefore help to overcome this limitation. Herein, we have performed the first thorough analysis of the folding propensities of α-aminoxy peptoids (or N-substituted 2-aminoxyacetic acid oligomers). To this end, the amide bond geometry and the conformational properties of a series of model α-aminoxy peptoids were investigated by using 1D and 2D NMR experiments, X-ray crystallography, natural bond orbital (NBO) analysis, circular dichroism (CD) spectroscopy, and molecular dynamics (MD) simulations revealing a unique preference for cis-amide bonds even in the absence of cis-directing side chains. The conformational analysis based on the MD simulations revealed that α-aminoxy peptoids can adopt helical conformations that can mimic the spatial arrangement of peptide side chains in a canonical α-helix. Given their ease of synthesis and conformational properties, α-aminoxy peptoids represent a new member of the peptoid family capable of controlling the amide isomerism while maintaining the potential for side-chain diversity.
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Affiliation(s)
- Viktoria Krieger
- Institute of Pharmaceutical and Medicinal Chemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, 40225, Düsseldorf, Germany
| | - Emanuele Ciglia
- Institute of Pharmaceutical and Medicinal Chemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, 40225, Düsseldorf, Germany
| | - Roland Thoma
- Institute of Inorganic and Structural Chemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, 40225, Düsseldorf, Germany
| | - Vera Vasylyeva
- Institute of Inorganic and Structural Chemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, 40225, Düsseldorf, Germany
| | - Benedikt Frieg
- Institute of Pharmaceutical and Medicinal Chemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, 40225, Düsseldorf, Germany
| | - Nader de Sousa Amadeu
- Institute of Inorganic and Structural Chemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, 40225, Düsseldorf, Germany
| | - Thomas Kurz
- Institute of Pharmaceutical and Medicinal Chemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, 40225, Düsseldorf, Germany
| | - Christoph Janiak
- Institute of Inorganic and Structural Chemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, 40225, Düsseldorf, Germany
| | - Holger Gohlke
- Institute of Pharmaceutical and Medicinal Chemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, 40225, Düsseldorf, Germany
| | - Finn K Hansen
- Institute of Pharmaceutical and Medicinal Chemistry, Heinrich-Heine-Universität Düsseldorf, Universitätsstrasse 1, 40225, Düsseldorf, Germany.,Pharmaceutical/Medicinal Chemistry, Institute of Pharmacy, Leipzig University, Brüderstrasse 34, 04103, Leipzig, Germany
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Gangloff N, Ulbricht J, Lorson T, Schlaad H, Luxenhofer R. Peptoids and Polypeptoids at the Frontier of Supra- and Macromolecular Engineering. Chem Rev 2015; 116:1753-802. [DOI: 10.1021/acs.chemrev.5b00201] [Citation(s) in RCA: 190] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- Niklas Gangloff
- Functional Polymer
Materials, Chair for Chemical Technology of Materials Synthesis, University of Würzburg, Röntgenring 11, 97070 Würzburg, Germany
| | - Juliane Ulbricht
- Functional Polymer
Materials, Chair for Chemical Technology of Materials Synthesis, University of Würzburg, Röntgenring 11, 97070 Würzburg, Germany
| | - Thomas Lorson
- Functional Polymer
Materials, Chair for Chemical Technology of Materials Synthesis, University of Würzburg, Röntgenring 11, 97070 Würzburg, Germany
| | - Helmut Schlaad
- Institute of Chemistry, University of Potsdam, Karl-Liebknecht-Str. 24-25, 14476 Potsdam, Germany
| | - Robert Luxenhofer
- Functional Polymer
Materials, Chair for Chemical Technology of Materials Synthesis, University of Würzburg, Röntgenring 11, 97070 Würzburg, Germany
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Knight AS, Zhou EY, Francis MB, Zuckermann RN. Sequence Programmable Peptoid Polymers for Diverse Materials Applications. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2015; 27:5665-5691. [PMID: 25855478 DOI: 10.1002/adma.201500275] [Citation(s) in RCA: 169] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/18/2015] [Revised: 02/13/2015] [Indexed: 06/04/2023]
Abstract
Polymer sequence programmability is required for the diverse structures and complex properties that are achieved by native biological polymers, but efforts towards controlling the sequence of synthetic polymers are, by comparison, still in their infancy. Traditional polymers provide robust and chemically diverse materials, but synthetic control over their monomer sequences is limited. The modular and step-wise synthesis of peptoid polymers, on the other hand, allows for precise control over the monomer sequences, affording opportunities for these chains to fold into well-defined nanostructures. Hundreds of different side chains have been incorporated into peptoid polymers using efficient reaction chemistry, allowing for a seemingly infinite variety of possible synthetically accessible polymer sequences. Combinatorial discovery techniques have allowed the identification of functional polymers within large libraries of peptoids, and newly developed theoretical modeling tools specifically adapted for peptoids enable the future design of polymers with desired functions. Work towards controlling the three-dimensional structure of peptoids, from the conformation of the amide bond to the formation of protein-like tertiary structure, has and will continue to enable the construction of tunable and innovative nanomaterials that bridge the gap between natural and synthetic polymers.
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Affiliation(s)
- Abigail S Knight
- UC Berkeley Chemistry Department, Latimer Hall, Berkeley, CA, 94720, USA
| | - Effie Y Zhou
- UC Berkeley Chemistry Department, Latimer Hall, Berkeley, CA, 94720, USA
| | - Matthew B Francis
- UC Berkeley Chemistry Department, Latimer Hall, Berkeley, CA, 94720, USA
- The Molecular Foundry Lawrence Berkeley National Lab, 1 Cyclotron Road, Berkeley, CA, 94720, USA
| | - Ronald N Zuckermann
- The Molecular Foundry Lawrence Berkeley National Lab, 1 Cyclotron Road, Berkeley, CA, 94720, USA
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Jordan PA, Paul B, Butterfoss GL, Renfrew PD, Bonneau R, Kirshenbaum K. Oligo(N-alkoxy glycines): trans substantiating peptoid conformations. Biopolymers 2012; 96:617-26. [PMID: 22180909 DOI: 10.1002/bip.21675] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Peptoid oligomers possess many desirable attributes bioactive peptidomimetic agents, including their ease of synthesis, chemical diversity, and capability for molecular recognition. Ongoing efforts to develop functional peptoids will necessitate improved capability for control of peptoid structure, particularly of the backbone amide conformation. We introduce alkoxyamines as a new reagent for solid phase peptoid synthesis. Herein, we describe the synthesis of N-alkoxy peptoids, and present NMR data indicating that the oligomers adopt a single stable conformation featuring trans amide bonds. These findings, combined with results from computational modeling, suggest that N-alkoxy peptoid oligomers have a strong propensity to adopt a polyproline II type secondary structure.
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Affiliation(s)
- Peter A Jordan
- Department of Chemistry, New York University, NY 10003, USA
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8
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Lu X, Long TE. Asymmetric synthesis of monocyclic β-lactams from l-cysteine using photochemistry. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2011.07.085] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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9
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Draghici B, Hansen FK, Buciumas AM, El-Gendy BEDM, Todadze E, Katritzky AR. Efficient microwave-assisted synthesis of aminoxy acid conjugates. RSC Adv 2011. [DOI: 10.1039/c1ra00413a] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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10
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Culf AS, Ouellette RJ. Solid-phase synthesis of N-substituted glycine oligomers (alpha-peptoids) and derivatives. Molecules 2010; 15:5282-335. [PMID: 20714299 PMCID: PMC6257730 DOI: 10.3390/molecules15085282] [Citation(s) in RCA: 139] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2010] [Revised: 07/14/2010] [Accepted: 08/02/2010] [Indexed: 12/02/2022] Open
Abstract
Peptoids (N-substituted polyglycines and extended peptoids with variant backbone amino-acid monomer units) are oligomeric synthetic polymers that are becoming a valuable molecular tool in the biosciences. Of particular interest are their applications to the exploration of peptoid secondary structures and drug design. Major advantages of peptoids as research and pharmaceutical tools include the ease and economy of synthesis, highly variable backbone and side-chain chemistry possibilities. At the same time, peptoids have been demonstrated as highly active in biological systems while resistant to proteolytic decay. This review with 227 references considers the solid-phase synthetic aspects of peptoid preparation and utilization up to 2010 from the instigation, by R. N. Zuckermann et al., of peptoid chemistry in 1992.
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Affiliation(s)
- Adrian S Culf
- Atlantic Cancer Research Institute, Moncton, NB, Canada.
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11
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Katritzky AR, Avan I, Tala SR. Efficient Preparation of Aminoxyacyl Amides, Aminoxy Hybrid Peptides, and α-Aminoxy Peptides. J Org Chem 2009; 74:8690-4. [DOI: 10.1021/jo901612j] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alan R. Katritzky
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200
| | - Ilker Avan
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200
- Department of Chemistry, Anadolu University, 26470, Eskişehir, Turkey
| | - Srinivasa R. Tala
- Center for Heterocyclic Compounds, Department of Chemistry, University of Florida, Gainesville, Florida 32611-7200
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12
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Schottelius M, Berger S, Poethko T, Schwaiger M, Wester HJ. Development of Novel68Ga- and18F-Labeled GnRH-I Analogues with High GnRHR-Targeting Efficiency. Bioconjug Chem 2008; 19:1256-68. [DOI: 10.1021/bc800058k] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Margret Schottelius
- Nuklearmedizinische Klinik and Poliklinik, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
| | - Sebastian Berger
- Nuklearmedizinische Klinik and Poliklinik, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
| | - Thorsten Poethko
- Nuklearmedizinische Klinik and Poliklinik, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
| | - Markus Schwaiger
- Nuklearmedizinische Klinik and Poliklinik, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
| | - Hans-Jürgen Wester
- Nuklearmedizinische Klinik and Poliklinik, Klinikum rechts der Isar, Technische Universität München, 81675 München, Germany
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Liu F, Stephen AG, Adamson C, Gousset K, Aman MJ, Freed EO, Fisher RJ, Burke TR. Hydrazone- and hydrazide-containing N-substituted glycines as peptoid surrogates for expedited library synthesis: application to the preparation of Tsg101-directed HIV-1 budding antagonists. Org Lett 2007; 8:5165-8. [PMID: 17048869 PMCID: PMC2547129 DOI: 10.1021/ol0622211] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Replacing the Pro6 in the p6(Gag)-derived 9-mer "P-E-P-T-A-P-P-E-E" with N-substituted glycine (NSG) residues is problematic. However, incorporation of hydrazone amides ("peptoid hydrazones") can be readily achieved in library fashion. Furthermore, reduction of these hydrazones to N-substituted "peptoid hydrazides" affords a facile route to library diversification. This approach is demonstrated by application to Tsg101-binding compounds designed as potential HIV budding antagonists. [reaction: see text]
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Affiliation(s)
- Fa Liu
- Laboratory of Medicinal Chemistry, CCR, NCI-Frederick, NIH, Bldg. 376 Boyles St., Frederick, MD 21702
| | | | | | | | - M. Javad Aman
- U.S. Army Medical Research Institute for Infectious Diseases, Frederick, MD
| | | | | | - Terrence R. Burke
- Laboratory of Medicinal Chemistry, CCR, NCI-Frederick, NIH, Bldg. 376 Boyles St., Frederick, MD 21702
- e-mail:
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14
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Chen H, Feng Y, Xu Z, Ye T. The total synthesis and reassignment of stereochemistry of dragonamide. Tetrahedron 2005. [DOI: 10.1016/j.tet.2005.09.040] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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15
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Schottelius M, Poethko T, Herz M, Reubi JC, Kessler H, Schwaiger M, Wester HJ. First (18)F-labeled tracer suitable for routine clinical imaging of sst receptor-expressing tumors using positron emission tomography. Clin Cancer Res 2004; 10:3593-606. [PMID: 15173065 DOI: 10.1158/1078-0432.ccr-03-0359] [Citation(s) in RCA: 89] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Despite excellent radionuclide characteristics, no (18)F-labeled peptides are available for quantitative peptide receptor mapping using positron emission tomography (PET) so far, mainly due to time-consuming multistep radiosyntheses with limited overall yields. A newly developed two-step chemoselective conjugation method allows rapid and high-yield [(18)F]fluorination of peptides via oxime formation and was applied for the synthesis of new (18)F-labeled carbohydrated Tyr(3)-octreotate (TOCA) analogs with optimized pharmacokinetics suitable for clinical routine somatostatin-receptor (sst) imaging. EXPERIMENTAL DESIGN (18)F-labeled glucose (Gluc-S-) and cellobiose (Cel-S-) derivatives of aminooxy-functionalized TOCA were synthesized via oxime formation with 4-[(18)F]fluorobenzaldehyde ([(18)F]FBOA-peptides). Both the in vitro internalization profile of Gluc-S-Dpr([(18)F]FBOA)TOCA and Cel-S-Dpr([(18)F]FBOA)TOCA in hsst(2)-expressing Chinese hamster ovary cells (dual tracer protocol) and their biodistribution in AR42J tumor-bearing mice were investigated and compared with two [(18)F]fluoropropionylated ([(18)F]FP) analogs, Gluc-Lys([(18)F]FP)TOCA and Gluc-S-Dpr([(18)F]FP)TOCA. RESULTS In contrast to [(18)F]FP-labeling (3 h), chemo-selective [(18)F]FBOA-formation (50 min) afforded the respective radiopeptides in high yields (65-85%). In vitro, Gluc-S-Dpr([(18)F]FBOA)TOCA and Cel-S-Dpr([(18)F]FBOA)-TOCA showed high internalization (139 +/- 2 and 163 +/- 8 of the reference [(125)I]Tyr(3)-octreotide, respectively), which was reflected by high tumor accumulation in vivo [21.8 +/- 1.4 and 24.0 +/- 2.5% of injected dose/g (1 h), respectively]. How-ever, only Cel-S-Dpr([(18)F]FBOA)TOCA and Gluc-S-Dpr([(18)F]FP)TOCA (tumor: 15.1 +/- 1.5% of injected dose/g) with its very low accumulation in all of the nontarget organs showed improved tumor:organ ratios compared with Gluc-Lys([(18)F]FP)TOCA. For Cel-S-Dpr([(18)F]FBOA)TOCA,tumor:organ ratios (1 h) were 42:1, 27:1, 15:1, 3:1, and 208:1 for blood, liver, intestine, kidney, and muscle, respectively. CONCLUSION Due to the fast and high-yield chemoselective radiofluorination strategy and to its excellent pharmacokinetics, Cel-S-Dpr([(18)F]FBOA)TOCA represents the first tracer suitable for routine clinical application in PET somatostatin receptor imaging.
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Affiliation(s)
- Margret Schottelius
- Nuklearmedizinische Klinik und Poliklinik, Klinikum rechts der Isar, Technische Universität München, München, Germany
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16
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Scheiper B, Glorius F, Leitner A, Fürstner A. Catalysis-based enantioselective total synthesis of the macrocyclic spermidine alkaloid isooncinotine. Proc Natl Acad Sci U S A 2004; 101:11960-5. [PMID: 15141085 PMCID: PMC514416 DOI: 10.1073/pnas.0401322101] [Citation(s) in RCA: 107] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
A concise and efficient total synthesis of the spermidine alkaloid (-)-isooncinotine (1) incorporating a 22-membered lactam ring is outlined. The approach is largely catalysis-based, involving a selective iron-catalyzed alkyl-aryl cross-coupling reaction of a difunctionalized pyridine substrate, a heterogeneous asymmetric hydrogenation step to set the chiral center of the target, and a highly integrated ring-closing metathesis/hydrogenation sequence to forge the saturated macrocyclic edifice in a single operation.
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Affiliation(s)
- Bodo Scheiper
- Max-Planck-Institut für Kohlenforschung, D-45470 Mülheim/Ruhr, Germany
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Abstract
[structure: see text] In the present paper, we have looked at iterative coupling as a strategy to form new druglike molecules. We have developed an iterative coupling chemistry based on oxime bond formation between hydroxyaromatic aldehyde building blocks to form linear oxime oligomers. The strategy is validated by the discovery of micromolar protease inhibitors.
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Affiliation(s)
- Olivier Renaudet
- Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland
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Bouget K, Aubin S, Delcros JG, Arlot-Bonnemains Y, Baudy-Floc'h M. Hydrazino-aza and N -azapeptoids with therapeutic potential as anticancer agents. Bioorg Med Chem 2003; 11:4881-9. [PMID: 14604649 DOI: 10.1016/j.bmc.2003.09.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
The ubiquitin-proteasome-mediated degradation pathway plays an important role in regulating protein turnover in eucaryotic cells and, consequently, regulates both cell proliferation and cell death. The proteasome influences many cellular regulatory signals and is thus a potential target for pharmacological agents. The study of proteasome function has led to the identification of several natural and synthetic compounds that can act as tumor cell growth inhibitors. In this study, we have developed a series of hydrazino-aza and N-azapeptoids, analogues of Ac-Leucyl-Leucyl-Norleucinal (ALLN) a non-specific peptidyl aldehyde inhibitor of the proteasome. These peptide analogues share a common backbone and bear different C- and N-terminal functions. Their antiproliferative activity on murine leukemia L1210 cells is reported here.
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Affiliation(s)
- Karine Bouget
- Laboratoire de Synthèse et Electrosynthèse Organiques (SESO), CNRS UMR 6510, Université de Rennes I, Avenue du Général Leclerc, F-35042 Cédex, Rennes, France
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19
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