Related Experiment Video
Updated: Jun 3, 2025
Parallel Interrogation of β-Arrestin2 Recruitment for Ligand Screening on a GPCR-Wide Scale using PRESTO-Tango Assay
Published on: March 10, 2020
Detection of Human GPCR Activity in Drosophila S2 Cells Using the Tango System
Emil Salim1,2, Aki Hori1, Kohei Matsubara3
1Faculty of Pharmacy, Institute of Medical, Pharmaceutical and Health Sciences, Kanazawa University, Osaka 920-1192, Japan.
Abstract:
G protein-coupled receptors (GPCRs) are essential cell surface proteins involved in transducing extracellular signals into intracellular responses, regulating various physiological processes. This study validated the use of the Tango assay, a sensitive method for detecting GPCR activation, in Drosophila Schneider 2 (S2) cells, focusing on the human Dopamine Receptor D4 (DRD4). Plasmids encoding the LexA-tagged human DRD4 receptor and a luciferase reporter were co-transfected into Drosophila S2 cells and stimulated with dopamine. Receptor activation was measured by quantifying the luciferase activity. The system showed high specificity for dopamine, with no activation in response to octopamine, a non-ligand for DRD4. Furthermore, the system effectively detects activation by a novel compound. These results demonstrate that Drosophila S2 cells, coupled with the Tango assay, provide a viable model for studying human GPCR function and ligand specificity. This system enables the rapid screening of potential GPCR ligands in a cost-effective cellular model.
Insights
This study validates the Tango assay in Drosophila S2 cells for detecting G protein-coupled receptor (GPCR) activation. The system accurately measures human Dopamine Receptor D4 (DRD4) activity and specificity, enabling efficient ligand screening.
Area of Science:
- Pharmacology
- Cell Biology
- Biochemistry
Background:
- G protein-coupled receptors (GPCRs) are crucial cell surface proteins mediating signal transduction.
- Understanding GPCR activation is vital for numerous physiological processes and drug discovery.
Purpose of the Study:
- To validate the Tango assay for detecting GPCR activation in Drosophila Schneider 2 (S2) cells.
- To assess the specificity and utility of this system for studying human Dopamine Receptor D4 (DRD4).
Main Methods:
- Co-transfection of LexA-tagged human DRD4 and a luciferase reporter in Drosophila S2 cells.
- Stimulation with dopamine and measurement of luciferase activity to quantify receptor activation.
- Testing specificity using octopamine and a novel activating compound.
Main Results:
- The Tango assay in Drosophila S2 cells successfully detected human DRD4 activation by dopamine.
- The system demonstrated high specificity, showing no response to octopamine.
- Activation by a novel compound was also effectively detected, confirming assay sensitivity.
Conclusions:
- Drosophila S2 cells combined with the Tango assay offer a viable model for studying human GPCR function.
- This cost-effective system facilitates rapid screening of GPCR ligands and assessment of ligand specificity.
- The validated system supports research into GPCRs and the development of targeted therapeutics.
More Related Videos
11:49Characterization of G Protein-coupled Receptors by a Fluorescence-based Calcium Mobilization Assay
Published on: July 28, 2014
09:05Multiplex Detection of Gene Expression in the Intact Drosophila Brain Using Expansion-Assisted Iterative Fluorescence In Situ Hybridization
Published on: May 2, 2025