title: Homogeneous cell-based fluorescence polarization assay for the direct detection of cAMP.
abstract: A fluorescence polarization-based functional assay for cyclic AMP (cAMP) production in cells has been proven effective for the detection of agonist-stimulated cAMP production in a HEK 293 recombinant cell line expressing the corticotropin-releasing factor subtype 2alpha (CRF2alpha) receptor. Assays were completed in a single well of a 384-well microplate with no transfer, separation, or wash steps incurred. The assay performance is excellent for adaptation to the high throughput screening environment in terms of speed of analysis, magnitude of displaced signal, precision, and detection limits for cAMP quantitation. Relative potencies of agonists and antagonists are maintained with respect to radiometric assays. The assay withstands up to 5% DMSO and up to 10 microM concentrations of highly colored compound. These attributes suggest that accurate assessment of drug binding can be measured using this assay.
authors.affiliation: PerkinElmer Life Sciences, Montreal, Quebec, Canada.
authors.forename: L
authors.initials: L
authors.lastname: Prystay
authors.forename: A
authors.initials: A
authors.lastname: Gagné
authors.forename: P
authors.initials: P
authors.lastname: Kasila
authors.forename: L A
authors.initials: LA
authors.lastname: Yeh
authors.forename: P
authors.initials: P
authors.lastname: Banks
mesh_terms: D029845:Amphibian Proteins; D002460:Cell Line; D005576:Colforsin / Q000494:pharmacology; D000242:Cyclic AMP / Q000032:analysis* / Q000096:biosynthesis / Q000378:metabolism; D004121:Dimethyl Sulfoxide / Q000494:pharmacology; D004305:Dose-Response Relationship, Drug; D005454:Fluorescence Polarization / Q000379:methods*; D006801:Humans; D036361:Peptide Hormones; D010455:Peptides / Q000494:pharmacology; D018019:Receptors, Corticotropin-Releasing Hormone / Q000096:biosynthesis*; D012997:Solvents / Q000494:pharmacology; D014579:Urotensins / Q000037:antagonists & inhibitors / Q000494:pharmacology; D014665:Vasodilator Agents / Q000494:pharmacology
chemical_list: D029845:Amphibian Proteins; C101518:CRF(2alpha) receptor; D036361:Peptide Hormones; D010455:Peptides; D018019:Receptors, Corticotropin-Releasing Hormone; D012997:Solvents; D014579:Urotensins; D014665:Vasodilator Agents; D005576:Colforsin; C025727:sauvagine; D000242:Cyclic AMP; D004121:Dimethyl Sulfoxide