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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Cloning and expression of a cDNA for mouse prostaglandin E receptor EP3 subtype.

A functional cDNA clone for mouse EP3 subtype of prostaglandin (PG) E receptor was isolated from a mouse cDNA library using polymerase chain reaction based on the sequence of the human thromboxane A2 receptor and cross-hybridization screening. The mouse EP3 receptor consists of 365 amino acid residues with putative seven-transmembrane domains. The sequence revealed significant homology to the human thromboxane A2 receptor. Ligand binding studies using membranes of COS cells transfected with the cDNA revealed specific [3H]PGE2 binding. The binding was displaced with unlabeled PGs in the order of PGE2 = PGE1 greater than iloprost greater than PGF2 alpha greater than PGD2. The EP3-selective agonists, M&B 28,767 or GR 63799X, potently competed for the [3H]PGE2 binding, but no competition was found with EP1- or EP2-selective ligands. PGE2 and M&B 28,767 decreased forskolin-induced cAMP formation in a concentration-dependent manner in Chinese hamster ovary cells permanently expressing the cDNA. Northern blot analysis demonstrated that the EP3 mRNA is expressed abundantly in kidney, uterus, and mastocytoma P-815 cells and in a lesser amount in brain, thymus, lung, heart, stomach, and spleen.[1]

References

  1. Cloning and expression of a cDNA for mouse prostaglandin E receptor EP3 subtype. Sugimoto, Y., Namba, T., Honda, A., Hayashi, Y., Negishi, M., Ichikawa, A., Narumiya, S. J. Biol. Chem. (1992) [Pubmed]
 
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