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| | A.1 Inhibition of cAMP Activity of GPR6 In Vitro Assay |
| Description: | This cell based assay measures the ability of compounds to inhibit the constitutive cAMP activity of GPR6 receptor expressed in CHO-K1 cells. CHO cells were stably expressed with GPR6 receptor, whose expression is controlled by a tetracycline inducible element. The cells were cultured in medium containing F12K, 10% FBS, 1% Penn/Strep, 200 ug/mL Hygromycin. GPR6 receptor expression was induced for 20 hrs with 10 g/ml doxycycline (sigma D9891) in growth media. After addition of doxycycline cells were plated at a density of 250-500 cells per well in half-volume black clear bottom plates (Costar) and place in an incubator (37°, 5% C(O)2) for 20 hours prior to cAMP assays.Culture media was removed from cells and they were washed with 50 L of Ringer's Buffer (MgCl2 0.047 mg/mL, NaH2PO4 0.18 mg/mL, Na2HPO4 0.1 mg/mL, KCl 0.34 mg/mL, NaHC(O)3 1.26 mg/mL, D-glucose 1.8 mg/mL, NaCl 7 mg/mL; pH=7.4). Compounds suspended in DMSO were diluted in Ringer's Buffer containing 0.5% fatty acid free BSA and incubated on cells for 45 min at 37° and 5% C(O)2. After incubation cells were incubated for 10 min at room temp with Eu-cAMP tracer solution from a Perkin Elmer Lance HTRF UltracAMP assay kit (TRF0264). Then ULight -anti-cAMP solution from the Lance HTRF kit was added and incubated on a shaker at room temp for 1 hour prior to HTRF detection in a BMG PolarStar Omega.IC50 curves were generated with a four-parameter logistic equation using GraphPad Prism 5.03. |
| Affinity data for this assay | |
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