title: Cloning and characterization of an endogenous COS-7 cell thromboxane A2 receptor.
abstract: A cDNA for a thromboxane A2 (TXA2) receptor was cloned from an SV40 transformed African Green Monkey kidney cell line (COS-7). The sequence is 98% homologous with the isoform of the human TXA2 receptor and has agonist and antagonist ligand binding characteristics that are not significantly different from the human receptor. Stimulation of the COS-7 cells with the TXA2 receptor agonist, ONO 11113 resulted in a significant increase in cAMP formation that was blocked by a receptor antagonist. The results raise the question of the utility of the COS-7 cell line for studies of cloned and expressed TXA2 receptor signalling mechanisms.
authors.affiliation: Department of Cell and Molecular Pharmacology and Experimental Therapeutics, Division of Clinical Pharmacology, Medical University of South Carolina, Charleston, SC 29425, USA.
authors.forename: K P
authors.initials: KP
authors.lastname: Becker
authors.forename: M
authors.initials: M
authors.lastname: Ullian
authors.forename: P V
authors.initials: PV
authors.lastname: Halushka
mesh_terms: D000595:Amino Acid Sequence; D000818:Animals; D019556:COS Cells; D003001:Cloning, Molecular; D017124:Conserved Sequence; D000242:Cyclic AMP / Q000378:metabolism; D018076:DNA, Complementary / Q000737:chemistry; D008969:Molecular Sequence Data; D016133:Polymerase Chain Reaction; D012313:RNA / Q000032:analysis / Q000302:isolation & purification; D017482:Receptors, Thromboxane / Q000037:antagonists & inhibitors / Q000737:chemistry / Q000235:genetics*; D016415:Sequence Alignment; D017422:Sequence Analysis, DNA; D017386:Sequence Homology, Amino Acid; D013928:Thromboxane A2 / Q000031:analogs & derivatives / Q000494:pharmacology
chemical_list: D018076:DNA, Complementary; D017482:Receptors, Thromboxane; D013928:Thromboxane A2; D012313:RNA; C037866:STA 2; D000242:Cyclic AMP