Title : EP(3) prostanoid receptor isoforms utilize distinct mechanisms to regulate ERK 1/2 activation.

Pub. Date : 2009 Apr

PMID : 19416642






6 Functional Relationships(s)
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1 Using immunoblot analysis we found that nM concentrations of PGE(2) strongly stimulated the phosphorylation of ERK 1/2 by the EP(3-II) and EP(3-III) isoforms; whereas, ERK 1/2 phosphorylation by the EP(3-Ia) isoform was minimal and only occurred at muM concentrations of PGE(2). Prostaglandins E prostaglandin E receptor 3 Homo sapiens
2 Using immunoblot analysis we found that nM concentrations of PGE(2) strongly stimulated the phosphorylation of ERK 1/2 by the EP(3-II) and EP(3-III) isoforms; whereas, ERK 1/2 phosphorylation by the EP(3-Ia) isoform was minimal and only occurred at muM concentrations of PGE(2). Prostaglandins E prostaglandin E receptor 3 Homo sapiens
3 Furthermore, the mechanisms of the PGE(2) mediated phosphorylation of ERK 1/2 by the EP(3-II) and EP(3-III) isoforms were different. Prostaglandins E prostaglandin E receptor 3 Homo sapiens
4 Furthermore, the mechanisms of the PGE(2) mediated phosphorylation of ERK 1/2 by the EP(3-II) and EP(3-III) isoforms were different. Prostaglandins E prostaglandin E receptor 3 Homo sapiens
5 Thus, PGE(2) stimulation of ERK 1/2 phosphorylation by the EP(3-III) isoform involves activation of a Galpha(i)/PI3K/PKC/Src and EGFR-dependent pathway; while for the EP(3-II) isoform it involves activation of a Galpha(i)/Src and EGFR-dependent pathway. Prostaglandins E prostaglandin E receptor 3 Homo sapiens
6 Thus, PGE(2) stimulation of ERK 1/2 phosphorylation by the EP(3-III) isoform involves activation of a Galpha(i)/PI3K/PKC/Src and EGFR-dependent pathway; while for the EP(3-II) isoform it involves activation of a Galpha(i)/Src and EGFR-dependent pathway. Prostaglandins E prostaglandin E receptor 3 Homo sapiens