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Petricca L, Chiki N, Hanna-El-Daher L, Aeschbach L, Burai R, Stoops E, Fares MB, Lashuel HA. Comparative Analysis of Total Alpha-Synuclein (αSYN) Immunoassays Reveals That They Do Not Capture the Diversity of Modified αSYN Proteoforms. J Parkinsons Dis 2022; 12:1449-1462. [PMID: 35527570 PMCID: PMC9398082 DOI: 10.3233/jpd-223285] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Background: The development of therapeutics for Parkinson’s disease (PD) requires the establishment of biomarker assays to enable stratifying patients, monitoring disease progression, and assessing target engagement. Attempts to develop diagnostic assays based on detecting levels of the α-synuclein (αSYN) protein, a central player in the pathogenesis of PD, have yielded inconsistent results. Objective: To determine whether the three commercial kits that have been extensively used for total αSYN quantification in human biological fluids (from Euroimmun, MSD, and Biolegend) are capable of capturing the diversity and complexity of relevant αSYN proteoforms. Methods: We investigated and compared the ability of the different assays to detect the diversity of αSYN proteoforms using a library of αSYN proteins that comprise the majority of disease-relevant αSYN variants and post-translational modifications (PTMs). Results: Our findings showed that none of the three tested immunoassays accurately capture the totality of relevant αSYN species, and that these assays are unable to recognize most disease-associated C-terminally truncated variants of αSYN. Moreover, several N-terminal truncations and phosphorylation/nitration PTMs differentially modify the level of αSYN detection and recovery by different immunoassays, and a CSF matrix effect was observed for most of the αSYN proteoforms analyzed by the three immunoassays. Conclusion: Our results show that the tested immunoassays do not capture the totality of the relevant αSYN species and therefore may not be appropriate tools to provide an accurate measure of total αSYN levels in samples containing modified forms of the protein. This highlights the need for next generation αSYN immunoassays that capture the diversity of αSYN proteoforms.
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Affiliation(s)
| | - Nour Chiki
- ND Biosciences SA, Epalinges, Switzerland
| | - Layane Hanna-El-Daher
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute,Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Lorène Aeschbach
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute,Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Ritwik Burai
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute,Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
| | - Erik Stoops
- ADx NeuroSciences NV, Technologiepark 94 - Bio Incubator, Gent, Belgium
| | | | - Hilal A Lashuel
- ND Biosciences SA, Epalinges, Switzerland.,Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute,Ecole Polytechnique Fédérale de Lausanne (EPFL), Lausanne, Switzerland
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Chiki A, DeGuire SM, Ruggeri FS, Sanfelice D, Ansaloni A, Wang ZM, Cendrowska U, Burai R, Vieweg S, Pastore A, Dietler G, Lashuel HA. Frontispiece: Mutant Exon1 Huntingtin Aggregation is Regulated by T3 Phosphorylation-Induced Structural Changes and Crosstalk between T3 Phosphorylation and Acetylation at K6. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/anie.201781961] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anass Chiki
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Sean M. DeGuire
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Francesco S. Ruggeri
- The Laboratory of the Physics of Living Matter; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
- Current address: University of Cambridge; Department of Chemistry; Lensfield Road Cambridge CB2 1EW UK
| | - Domenico Sanfelice
- MRC National Institute for Medical Research; The Ridgeway, Mill Hill London NW71AA UK
| | - Annalisa Ansaloni
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Zhe-Ming Wang
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Urszula Cendrowska
- The Laboratory of the Physics of Living Matter; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Ritwik Burai
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Sophie Vieweg
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Annalisa Pastore
- MRC National Institute for Medical Research; The Ridgeway, Mill Hill London NW71AA UK
| | - Giovanni Dietler
- The Laboratory of the Physics of Living Matter; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Hilal A. Lashuel
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
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Chiki A, DeGuire SM, Ruggeri FS, Sanfelice D, Ansaloni A, Wang ZM, Cendrowska U, Burai R, Vieweg S, Pastore A, Dietler G, Lashuel HA. Frontispiz: Mutant Exon1 Huntingtin Aggregation is Regulated by T3 Phosphorylation-Induced Structural Changes and Crosstalk between T3 Phosphorylation and Acetylation at K6. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201781961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Anass Chiki
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Sean M. DeGuire
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Francesco S. Ruggeri
- The Laboratory of the Physics of Living Matter; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
- Current address: University of Cambridge; Department of Chemistry; Lensfield Road Cambridge CB2 1EW UK
| | - Domenico Sanfelice
- MRC National Institute for Medical Research; The Ridgeway, Mill Hill London NW71AA UK
| | - Annalisa Ansaloni
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Zhe-Ming Wang
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Urszula Cendrowska
- The Laboratory of the Physics of Living Matter; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Ritwik Burai
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Sophie Vieweg
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Annalisa Pastore
- MRC National Institute for Medical Research; The Ridgeway, Mill Hill London NW71AA UK
| | - Giovanni Dietler
- The Laboratory of the Physics of Living Matter; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Hilal A. Lashuel
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
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Chiki A, DeGuire SM, Ruggeri FS, Sanfelice D, Ansaloni A, Wang ZM, Cendrowska U, Burai R, Vieweg S, Pastore A, Dietler G, Lashuel HA. Mutant Exon1 Huntingtin Aggregation is Regulated by T3 Phosphorylation-Induced Structural Changes and Crosstalk between T3 Phosphorylation and Acetylation at K6. Angew Chem Int Ed Engl 2017; 56:5202-5207. [DOI: 10.1002/anie.201611750] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 02/05/2017] [Indexed: 11/08/2022]
Affiliation(s)
- Anass Chiki
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Sean M. DeGuire
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Francesco S. Ruggeri
- The Laboratory of the Physics of Living Matter; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
- Current address: University of Cambridge; Department of Chemistry; Lensfield Road Cambridge CB2 1EW UK
| | - Domenico Sanfelice
- MRC National Institute for Medical Research; The Ridgeway, Mill Hill London NW71AA UK
| | - Annalisa Ansaloni
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Zhe-Ming Wang
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Urszula Cendrowska
- The Laboratory of the Physics of Living Matter; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Ritwik Burai
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Sophie Vieweg
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Annalisa Pastore
- MRC National Institute for Medical Research; The Ridgeway, Mill Hill London NW71AA UK
| | - Giovanni Dietler
- The Laboratory of the Physics of Living Matter; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Hilal A. Lashuel
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
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5
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Chiki A, DeGuire SM, Ruggeri FS, Sanfelice D, Ansaloni A, Wang ZM, Cendrowska U, Burai R, Vieweg S, Pastore A, Dietler G, Lashuel HA. Mutant Exon1 Huntingtin Aggregation is Regulated by T3 Phosphorylation-Induced Structural Changes and Crosstalk between T3 Phosphorylation and Acetylation at K6. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201611750] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anass Chiki
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Sean M. DeGuire
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Francesco S. Ruggeri
- The Laboratory of the Physics of Living Matter; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
- Current address: University of Cambridge; Department of Chemistry; Lensfield Road Cambridge CB2 1EW UK
| | - Domenico Sanfelice
- MRC National Institute for Medical Research; The Ridgeway, Mill Hill London NW71AA UK
| | - Annalisa Ansaloni
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Zhe-Ming Wang
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Urszula Cendrowska
- The Laboratory of the Physics of Living Matter; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Ritwik Burai
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Sophie Vieweg
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Annalisa Pastore
- MRC National Institute for Medical Research; The Ridgeway, Mill Hill London NW71AA UK
| | - Giovanni Dietler
- The Laboratory of the Physics of Living Matter; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
| | - Hilal A. Lashuel
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Brain Mind Institute; Institute of Physics of Biological Systems; Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-; 1015 Lausanne Switzerland
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6
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Awad L, Jejelava N, Burai R, Lashuel HA. A New Caged-Glutamine Derivative as a Tool To Control the Assembly of Glutamine-Containing Amyloidogenic Peptides. Chembiochem 2016; 17:2353-2360. [DOI: 10.1002/cbic.201600474] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Indexed: 12/19/2022]
Affiliation(s)
- Loay Awad
- College of Engineering; University of Dammam; P. O. Box 1982 Dammam 31451 Saudi Arabia
| | - Nino Jejelava
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Ecole Polytechnique Fédérale de Lausanne; EPFL); 1015 Lausanne Switzerland
| | - Ritwik Burai
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Ecole Polytechnique Fédérale de Lausanne; EPFL); 1015 Lausanne Switzerland
| | - Hilal A. Lashuel
- Laboratory of Molecular and Chemical Biology of Neurodegeneration; Ecole Polytechnique Fédérale de Lausanne; EPFL); 1015 Lausanne Switzerland
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Burai R, Ait-Bouziad N, Chiki A, Lashuel HA. Elucidating the Role of Site-Specific Nitration of α-Synuclein in the Pathogenesis of Parkinson's Disease via Protein Semisynthesis and Mutagenesis. J Am Chem Soc 2015; 137:5041-52. [PMID: 25768729 DOI: 10.1021/ja5131726] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
Parkinson's disease (PD) is characterized by the loss of dopaminergic neurons in the substantia nigra and the presence of intraneuronal inclusions consisting of aggregated and post-translationally modified α-synuclein (α-syn). Despite advances in the chemical synthesis of α-syn and other proteins, the generation of site-specifically nitrated synthetic proteins has not been reported. Consequently, it has not been possible to determine the roles of nitration at specific residues in regulating the physiological and pathogenic properties of α-syn. Here we report, for the first time, the site-specific incorporation of 3-nitrotyrosine at different regions of α-syn using native chemical ligation combined with a novel desulfurization strategy. This strategy enabled us to investigate the role of nitration at single or multiple tyrosine residues in regulating α-syn structure, membrane binding, oligomerization, and fibrils formation. We demonstrate that different site-specifically nitrated α-syn species exhibit distinct structural and aggregation properties and exhibit reduced affinity to negatively charged vesicle membranes. We provide evidence that intermolecular interactions between the N- and C-terminal regions of α-syn play critical roles in mediating nitration-induced α-syn oligomerization. For example, when Y39 is not available for nitration (Y39F and Y39/125F), the extent of cross-linking is limited mostly to dimer formation, whereas mutants in which Y39 along with one or multiple C-terminal tyrosines (Y125F, Y133F, Y136F and Y133/136F) can still undergo nitration readily to form higher-order oligomers. Our semisynthetic strategy for generating site-specifically nitrated proteins opens up new possibilities for investigating the role of nitration in regulating protein structure and function in health and disease.
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Affiliation(s)
- Ritwik Burai
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Nadine Ait-Bouziad
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Anass Chiki
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
| | - Hilal A Lashuel
- Laboratory of Molecular and Chemical Biology of Neurodegeneration, Brain Mind Institute, Ecole Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland
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8
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Mohan U, Burai R, McNaughton BR. Reactivity between acetone and single-stranded DNA containing a 5′-capped 2′-fluoro-N7-methyl guanine. Tetrahedron Lett 2014. [DOI: 10.1016/j.tetlet.2014.04.055] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
We report the in vitro selection of a single-stranded 72-nucleotide DNA enzyme (deoxyribozyme) that catalyzes a Friedel-Crafts reaction between an indole and acyl imidazole in good yield and in aqueous solvent. Appreciable Friedel-Crafts product requires addition of copper nitrate and the deoxyribozyme. We observe deoxyribozyme-mediated bond formation for both in cis and in trans Friedel-Crafts reactions.
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Affiliation(s)
- Utpal Mohan
- Department of Chemistry, Colorado State University, 200 West Lake Street, Fort Collins, CO, USA
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10
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Burai R, Ramesh C, Nayak TK, Dennis MK, Bryant BK, Prossnitz ER, Arterburn JB. Synthesis and characterization of tricarbonyl-Re/Tc(I) chelate probes targeting the G protein-coupled estrogen receptor GPER/GPR30. PLoS One 2012; 7:e46861. [PMID: 23077529 PMCID: PMC3471960 DOI: 10.1371/journal.pone.0046861] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2012] [Accepted: 09/06/2012] [Indexed: 01/08/2023] Open
Abstract
The discovery of the G protein-coupled estrogen receptor GPER (also GPR30) and the resulting development of selective chemical probes have revealed new aspects of estrogen receptor biology. The potential clinical relevance of this receptor has been suggested from numerous studies that have identified GPER expression in breast, endometrial, ovarian and other cancers. Thus GPER can be considered a candidate biomarker and target for non-invasive imaging and therapy. We have designed and synthesized a series of organometallic tricarbonyl-rhenium complexes conjugated to a GPER-selective small molecule derived from tetrahydro-3H-cyclopenta[c]quinoline. The activity and selectivity of these chelates in GPER-mediated signaling pathways were evaluated. These results demonstrate that GPER targeting characteristics depend strongly on the structure of the chelate and linkage. Ethanone conjugates functioned as agonists, a 1,2,3-triazole spacer yielded an antagonist, and derivatives with increased steric volume exhibited decreased activities. Promising GPER selectivity was observed, as none of the complexes interacted with the nuclear estrogen receptors. Radiolabeling with technetium-99m in aqueous media was efficient and gave radioligands with high radiochemical yields and purity. These chelates have favorable physicochemical properties, show excellent stability in biologically relevant media, exhibit receptor specificity and are promising candidates for continuing development as diagnostic imaging agents targeting GPER expression in cancer.
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Affiliation(s)
- Ritwik Burai
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico, United States of America
| | - Chinnasamy Ramesh
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico, United States of America
| | - Tapan K. Nayak
- Department of Cell Biology and Physiology, University of New Mexico Health Science Center, Albuquerque, New Mexico, United States of America
| | - Megan K. Dennis
- Department of Cell Biology and Physiology, University of New Mexico Health Science Center, Albuquerque, New Mexico, United States of America
| | - Bj K. Bryant
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico, United States of America
| | - Eric R. Prossnitz
- Department of Cell Biology and Physiology, University of New Mexico Health Science Center, Albuquerque, New Mexico, United States of America
- University of New Mexico Cancer Center, University of New Mexico Health Science Center, Albuquerque, New Mexico, United States of America
| | - Jeffrey B. Arterburn
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico, United States of America
- University of New Mexico Cancer Center, University of New Mexico Health Science Center, Albuquerque, New Mexico, United States of America
- * E-mail:
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11
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Blakeley BD, DePorter SM, Mohan U, Burai R, Tolbert BS, McNaughton BR. Methods for identifying and characterizing interactions involving RNA. Tetrahedron 2012. [DOI: 10.1016/j.tet.2012.07.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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12
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Dennis MK, Field AS, Burai R, Ramesh C, Petrie WK, Bologa CG, Oprea TI, Yamaguchi Y, Hayashi SI, Sklar SLA, Hathaway HJ, Arterburn JB, Prossnitz ER. Identification of a GPER/GPR30 antagonist with improved estrogen receptor counterselectivity. J Steroid Biochem Mol Biol 2011; 127:358-66. [PMID: 21782022 PMCID: PMC3220788 DOI: 10.1016/j.jsbmb.2011.07.002] [Citation(s) in RCA: 228] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2011] [Revised: 07/01/2011] [Accepted: 07/03/2011] [Indexed: 12/16/2022]
Abstract
GPER/GPR30 is a seven-transmembrane G protein-coupled estrogen receptor that regulates many aspects of mammalian biology and physiology. We have previously described both a GPER-selective agonist G-1 and antagonist G15 based on a tetrahydro-3H-cyclopenta[c]quinoline scaffold. The antagonist lacks an ethanone moiety that likely forms important hydrogen bonds involved in receptor activation. Computational docking studies suggested that the lack of the ethanone substituent in G15 could minimize key steric conflicts, present in G-1, that limit binding within the ERα ligand binding pocket. In this report, we identify low-affinity cross-reactivity of the GPER antagonist G15 to the classical estrogen receptor ERα. To generate an antagonist with enhanced selectivity, we therefore synthesized an isosteric G-1 derivative, G36, containing an isopropyl moiety in place of the ethanone moiety. We demonstrate that G36 shows decreased binding and activation of ERα, while maintaining its antagonist profile towards GPER. G36 selectively inhibits estrogen-mediated activation of PI3K by GPER but not ERα. It also inhibits estrogen- and G-1-mediated calcium mobilization as well as ERK1/2 activation, with no effect on EGF-mediated ERK1/2 activation. Similar to G15, G36 inhibits estrogen- and G-1-stimulated proliferation of uterine epithelial cells in vivo. The identification of G36 as a GPER antagonist with improved ER counterselectivity represents a significant step towards the development of new highly selective therapeutics for cancer and other diseases.
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Affiliation(s)
- Megan K. Dennis
- Department of Cell Biology & Physiology, University of New Mexico Health Sciences Center, Albuquerque, NM 87131
| | - Angela S. Field
- Department of Cell Biology & Physiology, University of New Mexico Health Sciences Center, Albuquerque, NM 87131
| | - Ritwik Burai
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, NM 88003
| | - Chinnasamy Ramesh
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, NM 88003
| | - Whitney K. Petrie
- Department of Cell Biology & Physiology, University of New Mexico Health Sciences Center, Albuquerque, NM 87131
| | - Cristian G. Bologa
- Division of Biocomputing, Department of Biochemistry & Molecular Biology, University of New Mexico Health Sciences Center, Albuquerque, NM 87131
| | - Tudor I. Oprea
- Division of Biocomputing, Department of Biochemistry & Molecular Biology, University of New Mexico Health Sciences Center, Albuquerque, NM 87131
- UNM Cancer Center, University of New Mexico Health Sciences Center, Albuquerque, NM 87131
- Corresponding author: Eric R. Prossnitz; Tel: 505-272-5647; Fax: 505-272-1421;
| | - Yuri Yamaguchi
- Research Institute for Clinical Oncology, Saitama Cancer Center, Saitama, Japan
| | - Shin-ichi Hayashi
- Department of Molecular and Functional Dynamics, Tohoku University, Sendai, Japan
| | - S. Larry A. Sklar
- UNM Cancer Center, University of New Mexico Health Sciences Center, Albuquerque, NM 87131
- Department of Pathology, University of New Mexico Health Sciences Center, Albuquerque, NM 87131
| | - Helen J. Hathaway
- Department of Cell Biology & Physiology, University of New Mexico Health Sciences Center, Albuquerque, NM 87131
- UNM Cancer Center, University of New Mexico Health Sciences Center, Albuquerque, NM 87131
| | - Jeffrey B. Arterburn
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, NM 88003
- UNM Cancer Center, University of New Mexico Health Sciences Center, Albuquerque, NM 87131
- Corresponding author: Eric R. Prossnitz; Tel: 505-272-5647; Fax: 505-272-1421;
| | - Eric R. Prossnitz
- Department of Cell Biology & Physiology, University of New Mexico Health Sciences Center, Albuquerque, NM 87131
- UNM Cancer Center, University of New Mexico Health Sciences Center, Albuquerque, NM 87131
- Corresponding author: Eric R. Prossnitz; Tel: 505-272-5647; Fax: 505-272-1421;
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Burai R, Chatwichien J, McNaughton BR. A programmable “build–couple” approach to the synthesis of heterofunctionalized polyvalent molecules. Org Biomol Chem 2011; 9:5056-8. [DOI: 10.1039/c1ob05606a] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Nayak TK, Dennis MK, Ramesh C, Burai R, Atcher RW, Sklar LA, Norenberg JP, Hathaway HJ, Arterburn JB, Prossnitz ER. Influence of charge on cell permeability and tumor imaging of GPR30-targeted 111in-labeled nonsteroidal imaging agents. ACS Chem Biol 2010; 5:681-90. [PMID: 20486699 DOI: 10.1021/cb1000636] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Recent clinical studies implicate the role of G protein-coupled estrogen receptor, GPR30, in aggressive forms of breast, ovarian, and endometrial cancers. However, the functional role of GPR30 at cellular and molecular levels remains less clear and controversial, particularly its subcellular location. The primary objective of this study was to develop radiolabeled neutral and charged GPR30-targeted nonsteroidal analogues to understand the influence of ligand charge on cell binding, cellular permeability, and in vivo tumor imaging. Therefore, we developed a series of GPR30-targeted (111/113)In(III)-labeled analogues using macrocyclic and acyclic polyamino-polycarboxylate chelate designs that would render either a net negative or neutral charge. In vitro biological evaluations were performed to determine the role of negatively charged analogues on receptor binding and activation using calcium mobilization and phosphoinositide 3-kinase assays. In vivo evaluations were performed on GPR30-expressing human endometrial Hec50 tumor-bearing mice to characterize the biodistribution and potential application of GPR30-targeted imaging agents for translational research. In vitro functional assays revealed an effect of charge, such that only the neutral analogue activated GPR30-mediated rapid signaling pathways. These observations are consistent with expectations for initial rates of membrane permeability and suggest an intracellular rather than the cell surface location of functional receptor. In vivo studies revealed receptor-mediated uptake of the radiotracer in target organs and tumors; however, further structural modifications will be required for the development of future generations of GPR30-targeted imaging agents with enhanced metabolic properties and decreased nonspecific localization to the intestines.
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Affiliation(s)
- Tapan K. Nayak
- Department of Cell Biology and Physiology
- College of Pharmacy
| | | | - Chinnasamy Ramesh
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003
| | - Ritwik Burai
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003
| | - Robert W. Atcher
- College of Pharmacy
- UNM Cancer Center
- Bioscience Division, Los Alamos National Laboratory, Los Alamos, New Mexico 87545
| | - Larry A. Sklar
- College of Pharmacy
- UNM Cancer Center
- Department of Pathology, University of New Mexico Health Science Center, Albuquerque, New Mexico 87131
| | | | | | - Jeffrey B. Arterburn
- UNM Cancer Center
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003
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Burai R, Ramesh C, Shorty M, Curpan R, Bologa C, Sklar LA, Oprea T, Prossnitz ER, Arterburn JB. Highly efficient synthesis and characterization of the GPR30-selective agonist G-1 and related tetrahydroquinoline analogs. Org Biomol Chem 2010; 8:2252-9. [PMID: 20401403 DOI: 10.1039/c001307b] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The GPR30 agonist probe G-1 and structural analogs were efficiently synthesized using multicomponent or stepwise Sc(III)-catalyzed aza-Diels-Alder cyclization. Optimization of solvent and reaction temperature provided enhanced endo-diastereoselectivity.
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Affiliation(s)
- Ritwik Burai
- Department of Chemistry and Biochemistry MSC 3C, New Mexico State University, P.O. Box 30001, Las Cruces, New Mexico 88003, USA
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Ramesh C, Nayak TK, Burai R, Dennis MK, Hathaway HJ, Sklar LA, Prossnitz ER, Arterburn JB. Synthesis and characterization of iodinated tetrahydroquinolines targeting the G protein-coupled estrogen receptor GPR30. J Med Chem 2010; 53:1004-14. [PMID: 20041667 DOI: 10.1021/jm9011802] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
A series of iodo-substituted tetrahydro-3H-cyclopenta[c]quinolines was synthesized as potential targeted imaging agents for the G protein-coupled estrogen receptor GPR30. The affinity and specificity of binding to GPR30 versus the classical estrogen receptors ER alpha/beta and functional responses associated with ligand-binding were determined. Selected iodo-substituted tetrahydro-3H-cyclopenta[c]quinolines exhibited IC(50) values lower than 20 nM in competitive binding studies with GPR30-expressing human endometrial cancer cells. These compounds functioned as antagonists of GPR30 and blocked estrogen-induced PI3K activation and calcium mobilization. The tributylstannyl precursors of selected compounds were radiolabeled with (125)I using the iodogen method. In vivo biodistribution studies in female ovariectomized athymic (NCr) nu/nu mice bearing GPR30-expressing human endometrial tumors revealed GPR30-mediated uptake of the radiotracer ligands in tumor, adrenal, and reproductive organs. Biodistribution and quantitative SPECT/CT studies revealed structurally related differences in the pharmacokinetic profiles, target tissue uptake, and metabolism of the radiolabeled compounds as well as differences in susceptibility to deiodination. The high lipophilicity of the compounds adversely affects the in vivo biodistribution and clearance of these radioligands and suggests that further optimization of this parameter may lead to improved targeting characteristics.
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Affiliation(s)
- Chinnasamy Ramesh
- Department of Chemistry and Biochemistry, New Mexico State University, Las Cruces, New Mexico 88003, USA
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Dennis MK, Burai R, Ramesh C, Petrie WK, Alcon SN, Nayak TK, Bologa CG, Leitao A, Brailoiu E, Deliu E, Dun NJ, Sklar LA, Hathaway HJ, Arterburn JB, Oprea TI, Prossnitz ER. In vivo effects of a GPR30 antagonist. Nat Chem Biol 2009; 5:421-7. [PMID: 19430488 PMCID: PMC2864230 DOI: 10.1038/nchembio.168] [Citation(s) in RCA: 409] [Impact Index Per Article: 27.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2008] [Accepted: 03/16/2009] [Indexed: 12/13/2022]
Abstract
Estrogen is central to many physiological processes throughout the human body. We have previously shown that the G protein-coupled receptor GPR30/GPER, in addition to classical nuclear estrogen receptors (ERα/β), activates cellular signaling pathways in response to estrogen. In order to distinguish between the actions of classical estrogen receptors and GPR30, we have previously characterized a selective agonist of GPR30, G-1 (1). To complement the pharmacological properties of G-1, we sought to identify an antagonist of GPR30 that displays similar selectivity against the classical estrogen receptors. Here we describe the identification and characterization of a G-1 analog, G15 (2) that binds to GPR30 with high affinity and acts as an antagonist of estrogen signaling through GPR30. In vivo administration of G15 reveals that GPR30 contributes to both uterine and neurological responses initiated by estrogen. The identification of this antagonist will accelerate the evaluation of the roles of GPR30 in human physiology.
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Affiliation(s)
- Megan K Dennis
- Department of Cell Biology & Physiology, University of New Mexico Health Sciences Center, Albuquerque, New Mexico, USA
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Revankar CM, Mitchell HD, Field AS, Burai R, Corona C, Ramesh C, Sklar LA, Arterburn JB, Prossnitz ER. Synthetic estrogen derivatives demonstrate the functionality of intracellular GPR30. ACS Chem Biol 2007; 2:536-44. [PMID: 17655271 DOI: 10.1021/cb700072n] [Citation(s) in RCA: 124] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Estrogen mediates its effects through multiple cellular receptors. In addition to the classical nuclear estrogen receptors (ERalpha and ERbeta), estrogen also signals through the seven-transmembrane G-protein-coupled receptor (GPCR) GPR30. Although estrogen is a cell-permeable ligand, it is often assumed that all GPCRs function solely as cell surface receptors. Our previous results showed that GPR30 appeared to be expressed predominantly in the endoplasmic reticulum. A critical question that arises is whether this localization represents the site of functional receptor. To address this question, we synthesized a collection of cell-permeable and cell-impermeable estrogen derivatives. We hypothesized that if functional GPR30 were expressed at the cell surface, both permeable and impermeable derivatives would show activity. However, if functional GPR30 were predominantly intracellular, like ERalpha, only the permeable ligands should show activity. Cell permeability was assessed using cells expressing ERalpha as a model intracellular estrogen-binding receptor. Our results reveal that despite exhibiting similar binding affinities for GPR30, only the cell-permeable ligands are capable of stimulating rapid calcium mobilization and phosphoinositide 3-kinase (PI3K) activation. We conclude that GPR30 expressed intracellularly is capable of initiating cellular signaling and that there is insufficient GPR30 expressed on the cell surface to initiate signaling in response to impermeable ligands in the cell lines examined. To our knowledge, this is the first definitive demonstration of a functional intracellular transmembrane estrogen receptor.
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Affiliation(s)
- Chetana M Revankar
- Cancer Research and Treatment Center, University of New Mexico Health Sciences Center, Albuquerque, New Mexico 87131, USA
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Punidha S, Agarwal N, Burai R, Ravikanth M. Synthesis of N3S, N3O, N2S2, N2O2, N2SO and N2OS Porphyrins with Onemeso-Unsubstituted Carbon. European J Org Chem 2004. [DOI: 10.1002/ejoc.200300697] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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