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Related Experiment Video

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Simultaneous Multiple MS Binding Assays Addressing D1 and D2 Dopamine Receptors.

Marion Schuller1, Georg Höfner2, Klaus T Wanner2

  • 1Structural Genomics Consortium and Target Discovery Institute, Nuffield Department of Clinical Medicine, University of Oxford, Oxford, OX3 7FZ, UK.

Chemmedchem
|August 5, 2017
PubMed
Summary

Mass spectrometry (MS) binding assays offer a label-free alternative to traditional methods. This study demonstrates simultaneous monitoring of dopamine D1 and D2 receptor binding in a single experiment, showcasing MS assay versatility.

Keywords:
binding assaysliquid chromatographymass spectrometryneurotransmittersreceptors

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Area of Science:

  • Pharmacology
  • Analytical Chemistry
  • Biochemistry

Background:

  • Radioligand binding assays are standard but have limitations.
  • Mass spectrometry (MS) binding assays provide a label-free alternative.
  • MS assays offer simultaneous monitoring of multiple targets due to selective detection.

Purpose of the Study:

  • To demonstrate proof of concept for simultaneous MS binding assays.
  • To selectively target D1 and D2 dopamine receptors in a single experiment.
  • To showcase the enhanced versatility of MS binding assays.

Main Methods:

  • Development and validation of a sensitive LC-ESI-MS/MS method.
  • Quantification of reporter ligands SCH23390 (D1) and raclopride (D2).
  • Simultaneous saturation and competition experiments in the presence of D1 and D2 receptors.

Main Results:

  • A robust LC-ESI-MS/MS method was established for simultaneous quantification.
  • Simultaneous saturation and competition experiments were successfully performed.
  • Analysis of both D1 and D2 receptor binding within a single LC-MS/MS run.

Conclusions:

  • MS binding assays enable simultaneous monitoring of different ligands at multiple targets.
  • This strategy is feasible for dopamine D1 and D2 receptors.
  • MS binding assays offer superior versatility compared to conventional radioligand assays.