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Grob NM, Häussinger D, Deupi X, Schibli R, Behe M, Mindt TL. Triazolo-Peptidomimetics: Novel Radiolabeled Minigastrin Analogs for Improved Tumor Targeting. J Med Chem 2020; 63:4484-4495. [PMID: 32302139 DOI: 10.1021/acs.jmedchem.9b01936] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
MG11 is a truncated analog of minigastrin, a peptide with high affinity and specificity toward the cholecystokinin-2 receptor (CCK2R), which is overexpressed by different tumors. Thus, radiolabeled MG11 derivatives have great potential for use in cancer diagnosis and therapy. A drawback of MG11 is its fast degradation by proteases, leading to moderate tumor uptake in vivo. We introduced 1,4-disubstituted 1,2,3-triazoles as metabolically stable bioisosteres to replace labile amide bonds of the peptide. The "triazole scan" yielded peptidomimetics with improved resistance to enzymatic degradation and/or enhanced affinity toward the CCK2R. Remarkably, our lead compound achieved a 10-fold increase in receptor affinity, resulting in a 2.6-fold improved tumor uptake in vivo. Modeling of the ligand-CCK2R complex suggests that an additional cation-π interaction of the aromatic triazole moiety with the Arg356 residue of the receptor is accountable for these observations. We show for the first time that the amide-to-triazole substitution strategy offers new opportunities in drug development that go beyond the metabolic stabilization of bioactive peptides.
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Affiliation(s)
- Nathalie M Grob
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zürich, Switzerland
| | - Daniel Häussinger
- Department of Chemistry, University of Basel, 4056 Basel, Switzerland
| | - Xavier Deupi
- Condensed Matter Theory Group, Laboratory for Scientific Computing and Modelling, Paul Scherrer Institute, 5232 Villigen, Switzerland.,Laboratory of Biomolecular Research, Division of Biology and Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Roger Schibli
- Department of Chemistry and Applied Biosciences, ETH Zurich, 8093 Zürich, Switzerland.,Center for Radiopharmaceutical Sciences, Division of Biology and Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Martin Behe
- Center for Radiopharmaceutical Sciences, Division of Biology and Chemistry, Paul Scherrer Institute, 5232 Villigen, Switzerland
| | - Thomas L Mindt
- Ludwig Boltzmann Institute Applied Diagnostics, General Hospital of Vienna, 1090 Vienna, Austria.,Department of Inorganic Chemistry, Faculty of Chemistry, University of Vienna, 1090 Vienna, Austria.,Department of Biomedical Imaging and Image Guided Therapy, Medical University of Vienna, 1090 Vienna, Austria
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Bandyopadhyay B, Cheng TC, Wheeler SE, Duncan MA. Vibrational Spectroscopy and Theory of the Protonated Benzene Dimer and Trimer. J Phys Chem A 2012; 116:7065-73. [DOI: 10.1021/jp304091h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Affiliation(s)
- B. Bandyopadhyay
- Department of Chemistry, University of Georgia, Athens, Georgia 30602-2556,
United States
| | - T. C. Cheng
- Department of Chemistry, University of Georgia, Athens, Georgia 30602-2556,
United States
| | - S. E. Wheeler
- Department of Chemistry, Texas A&M University, College Station, Texas 77842, United States
| | - M. A. Duncan
- Department of Chemistry, University of Georgia, Athens, Georgia 30602-2556,
United States
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Mason JS, Bortolato A, Congreve M, Marshall FH. New insights from structural biology into the druggability of G protein-coupled receptors. Trends Pharmacol Sci 2012; 33:249-60. [DOI: 10.1016/j.tips.2012.02.005] [Citation(s) in RCA: 146] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2012] [Revised: 02/27/2012] [Accepted: 02/27/2012] [Indexed: 11/28/2022]
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Jaeger HM, Schaefer HF, Hohenstein EG, David Sherrill C. Structures of protonated benzene dimer and intermolecular interaction decomposition via symmetry-adapted perturbation theory. COMPUT THEOR CHEM 2011. [DOI: 10.1016/j.comptc.2011.06.027] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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CXCR3 antagonists: Quaternary ammonium salts equipped with biphenyl- and polycycloaliphatic-anchors. Bioorg Med Chem 2011; 19:3384-93. [DOI: 10.1016/j.bmc.2011.04.035] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2011] [Revised: 03/04/2011] [Accepted: 04/17/2011] [Indexed: 12/26/2022]
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