Forster, Lisa and Pockes, Steffen (2022) Investigating the ligand agonism and antagonism at the D-2long receptor by dynamic mass redistribution. SCIENTIFIC REPORTS, 12 (1): 9637. ISSN 2045-2322,
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The signalling of the D-2 receptor (D2R), a G protein-coupled receptor (GPCR), is a complex process consisting of various components. For the screening of D2R ligands, methods quantifying distinct second messengers such as cAMP or the interaction of the receptor with p-arrestin, are commonly employed. In contrast, a label-free biosensor technology like dynamic mass redistribution (DMR), where it is mostly unknown how the individual signalling pathways contribute to the DMR signal, provides a holistic readout of the complex cellular response. In this study, we report the successful application of the DMR technology to CHO-Kl cells stably expressing the human dopamine D-2(long) receptor. In real-time kinetic experiments, studies of D2R reference compounds yielded results for agonists and antagonists that were consistent with those obtained by conventional methods and also allowed a discrimination between partial and full agonists. Furthermore, investigations on the signalling pathway in CHO-K1 hD(2long) cells identified the G alpha(i/o) protein as the main proximal trigger of the observed DMR response. The present study has shown that the DMR technology is a valuable method for the characterisation of putative new ligands and, due to its label-free nature, suggests its use for deorphanisation studies of GPCRs.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | PROTEIN-COUPLED RECEPTORS; CELL-BASED ASSAYS; DOPAMINE-RECEPTOR; ADENYLYL-CYCLASE; MONOAMINERGIC RECEPTOR; ANTIPARKINSON AGENTS; DIFFERENTIAL ACTIONS; ANTIPSYCHOTIC-DRUGS; OPTICAL BIOSENSOR; MULTIPLE CLASSES; |
| Subjects: | 600 Technology > 615 Pharmacy |
| Divisions: | Chemistry and Pharmacy > Institute of Pharmacy |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 27 Nov 2023 13:43 |
| Last Modified: | 27 Nov 2023 13:43 |
| URI: | https://pred.uni-regensburg.de/id/eprint/56831 |
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