Assay Method Information

Assay Name:  Orexin Receptor Cell-Based Functional Assay
Description:  Measurement of [Ca2+]i using a FLIPR: CHO OX1 or CHO OX2 cells were seeded into black-walled clear-base 384-well plates (Corning, catalog #3712) at a density of 20,000 cells per well in F12-K medium supplemented with 10% FBS and then incubated in a 5% CO2, 37° C. incubator overnight to reach 90% confluency. The cells were incubated with equal volume of calcium 6 loading buffer (Molecular Devices, Inc.) containing 2.5 mM probenecid at 37° C. for 2 h, followed by test compounds (dose-range 0.1 nM-10 μM) for another 30 min. The plates were then placed into a FLIPR (Molecular Devices, Inc.) to monitor fluorescence (λ excitation 488 nm, λ emission 540 nm) before and after the addition of EC90 of [OX].
Affinity data for this assay
 

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