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Assay Method Information

Assay Name:  Radioactive Assay
Description:  For assessing activity of compounds on PDE10 inhibition, the following modifications of the protocol described below are applied: protein amount: 3 ng protein concentration: 75 ug/ul.For all experiments the Phosphodiesterase [3H]cAMP SPA Enzyme Assay (TRKQ7090, GE Healthcare Europe GmbH) were used. The enzymatic activity of the PDE2 and the inhibitory potency of compounds was measured by the conversion of [3H]cAMP to [3H]AMP. [3H]AMP associate to the scintillator soaked yttrium-silicate beads resulting in an increase in scintillation events. Compounds that inhibit the respective enzymes decrease the generation of [3H]AMP and accordingly the number of counts detected.SF9 lysate containing PDE2A is incubated at room temperature for 1 h with [3H]cAMP and the reaction is terminated by addition of SPA beads in 18 mM zinc sulphate. The [3H]AMP bound to SPA beads is determined after at least 3 hours of sedimentation of the beads, the signal is recorded using the TopCount.
Affinity data for this assay
 

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Last update November 1, 2007
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