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Ricart-Ortega M, Berizzi AE, Catena J, Malhaire F, Muñoz L, Serra C, Lebon G, Goudet C, Llebaria A. Development and validation of a mass spectrometry binding assay for mGlu5 receptor. Anal Bioanal Chem 2020; 412:5525-5535. [PMID: 32564119 DOI: 10.1007/s00216-020-02772-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2020] [Revised: 06/03/2020] [Accepted: 06/12/2020] [Indexed: 10/24/2022]
Abstract
Mass spectrometry (MS) binding assays are a label-free alternative to radioligand or fluorescence binding assays, so the readout is based on direct mass spectrometric detection of the test ligand. The study presented here describes the development and validation of a highly sensitive, rapid, and robust MS binding assay for the quantification of the binding of the metabotropic glutamate 5 (mGlu5) negative allosteric modulator (NAM), MPEP (2-methyl-6-phenylethynylpyridine) at the mGlu5 allosteric binding site. The LC-ESI-MS/MS (liquid chromatography-electrospray ionization-tandem mass spectrometric) analytical method was established and validated with a deuterated analogue of MPEP as an internal standard. The developed MS binding assay described here allowed for the determination of MS binding affinity estimates that were in agreement with affinity estimates obtained from a tritiated MPEP radioligand saturation binding assay, indicating the suitability of this methodology for determining affinity estimates for compounds that target mGlu5 allosteric binding sites. Graphical abstract.
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Affiliation(s)
- Maria Ricart-Ortega
- MCS, Laboratory of Medicinal Chemistry & Synthesis, Department of Biological Chemistry, Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18, 08034, Barcelona, Spain.,IGF, CNRS, INSERM, University of Montpellier, 34094, Montpellier, France
| | - Alice E Berizzi
- IGF, CNRS, INSERM, University of Montpellier, 34094, Montpellier, France
| | - Juanlo Catena
- MCS, Laboratory of Medicinal Chemistry & Synthesis, Department of Biological Chemistry, Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18, 08034, Barcelona, Spain
| | - Fanny Malhaire
- IGF, CNRS, INSERM, University of Montpellier, 34094, Montpellier, France
| | - Lourdes Muñoz
- MCS, Laboratory of Medicinal Chemistry & Synthesis, Department of Biological Chemistry, Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18, 08034, Barcelona, Spain.,SIMchem, Service of Synthesis of High Added Value Molecules, Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18, 08034, Barcelona, Spain
| | - Carmen Serra
- MCS, Laboratory of Medicinal Chemistry & Synthesis, Department of Biological Chemistry, Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18, 08034, Barcelona, Spain.,SIMchem, Service of Synthesis of High Added Value Molecules, Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18, 08034, Barcelona, Spain
| | - Guillaume Lebon
- IGF, CNRS, INSERM, University of Montpellier, 34094, Montpellier, France
| | - Cyril Goudet
- IGF, CNRS, INSERM, University of Montpellier, 34094, Montpellier, France.
| | - Amadeu Llebaria
- MCS, Laboratory of Medicinal Chemistry & Synthesis, Department of Biological Chemistry, Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18, 08034, Barcelona, Spain. .,SIMchem, Service of Synthesis of High Added Value Molecules, Institute for Advanced Chemistry of Catalonia (IQAC-CSIC), Jordi Girona 18, 08034, Barcelona, Spain.
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