Assay Method Information

Assay Name:  Binding Assay
Description:  Cell pellets from SK-N-MC cells stably or transiently transfected with human H4 receptor (NCBI accession No. AF312230) were used for the binding assays. Cell pellets were homogenized in 50 mM Tris/5 mM EDTA buffer and supernatants from an 800 g spin were collected and recentrifuged at 30,000 g for 30 min. Pellets were rehomogenized in 50 mM Tris/5 mM EDTA buffer. For competition binding studies, cell membranes were incubated with 2x KD (10 nM),[3H] histamine (Specific activity: 14.2 to 23 Ci/mmol), with or without test compounds for 45 to 60 min at 4 to 25° C. Ki values were calculated based on an experimentally determined appropriate KD values according to Cheng and Prusoff (Biochem. Pharmacol. 1973, 22(23):3099-3108).
Affinity data for this assay
 

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