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Assay Method Information

Assay Name:  In Vitro Functional Activity (Agonism) on Human S1P5 Receptors
Description:  The CHO-human-S1P5-Aeqorin assay was bought from Euroscreen, Brussels (Euroscreen, Technical dossier, Human Lysophospholid S1P5 (Edg8) receptor, DNA clone and CHO AequoScreen™ recombinant cell-line, catalog no: ES-593-A, September 2006). Human-S1P5-Aequorin cells express mitochondrial targeted apo-Aequorin. Cells have to be loaded with coelanterazine, in order to reconstitute active Aequorin. After binding of agonists to the human S1P5 receptor the intracellular calcium concentration increases and binding of calcium to the apo-Aequorin/coelenterazine complex leads to an oxidation reaction of coelenterazine, which results in the production of apo-Aequorin, coelenteramide, CO2 and light (□max 469 nm). This luminescent response is dependent on the agonist concentration. Luminescence is measured using the MicroBeta Jet (Perkin Elmer). Agonistic effects of compounds are expressed as pEC50. Compounds were tested at a 10 points half log concentration range, and 3 independent experiments were performed in single point's measurements.
Affinity data for this assay
 

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Last update November 1, 2007
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