2012
DOI: 10.1074/jbc.m112.422956
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Identification of a Tetrahydroquinoline Analog as a Pharmacological Inhibitor of the cAMP-binding Protein Epac

Abstract: Background:The guanine exchange factor Epac is a cAMP sensor. Results: We have identified a tetrahydroquinoline analog named CE3F4 that blocks Epac activation in response to cAMP in vitro and in living cultured cells. Conclusion: CE3F4 behaves as an uncompetitive antagonist of Epac with respect to cAMP. Significance: CE3F4 may serve as a basis for the development of new therapeutic drugs.

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Cited by 100 publications
(143 citation statements)
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“…The selective sAC inhibitor, KH7, blocked cAMP accumulation and significantly reduced HX+R-induced Epac1 activation in WT cardiomyocytes ( Figure 2C and 2F), as well as HX+R-induced cell damages, similarly to CE3F4 ( Figure 2D). 19 Taken together, these results provide strong evidence that Epac1 is activated by cAMP produced by sAC and directly promotes cardiomyocyte death under HX+R conditions.…”
Section: Epac1 Is Activated By Soluble Adenylyl Cyclase During Hypoximentioning
confidence: 53%
See 1 more Smart Citation
“…The selective sAC inhibitor, KH7, blocked cAMP accumulation and significantly reduced HX+R-induced Epac1 activation in WT cardiomyocytes ( Figure 2C and 2F), as well as HX+R-induced cell damages, similarly to CE3F4 ( Figure 2D). 19 Taken together, these results provide strong evidence that Epac1 is activated by cAMP produced by sAC and directly promotes cardiomyocyte death under HX+R conditions.…”
Section: Epac1 Is Activated By Soluble Adenylyl Cyclase During Hypoximentioning
confidence: 53%
“…19 HX+R induced a significant increase in the BRET ratio when compared with NX, which was blocked by a selective Epac1 inhibitor, CE3F4 19 ( Figure 2C), confirming Epac1 activation during HX+R. Furthermore, CE3F4 prevented HX+R-induced cell damage phenocopying Epac1 deletion ( Figure 2D), and the membrane-permeant Epac1-specific agonist, 8-pCPT-2′-O-MecAMP-AM (8-CPT-AM), 20 mimicked the effects of HX+R in WT cardiomyocytes cultured in NX conditions ( Figure 2E).…”
Section: Epac1 Is Activated By Soluble Adenylyl Cyclase During Hypoximentioning
confidence: 99%
“…We used the recently identified uncompetitive inhibitor CE3F4 to test the ability of CAMYEL to identify allosteric inhibitors of Epac (30). Preincubation with 3, 10, or 20 M CE3F4 reduced the maximal decrease in BRET produced by cAMP in a concentration-dependent manner and yielded a K i of 5.2 M (Fig.…”
Section: Use Of Camyel To Measure Epac Activity In Cell Lysates-mentioning
confidence: 99%
“…Ainsi, l'activation directe de Epac1 par un analogue de l'AMPc qui lui est spécifique, le 8-pCPT 3 [21], ou la surexpression de Epac1, favorisent l'hypertrophie cellulaire et l'expression des marqueurs du remodelage cardiaque délétère (programme génique foetal) [22,23]. À l'inverse, l'inhibition pharmacologique de Epac1 par un analogue de la tétrahydroquinoline, le CE3F4, ou l'extinction de Epac1 par l'utilisation de shARN, pré-viennent l'hypertrophie des cardiomyocytes induite par la stimulation des -AR [23][24][25]. Le mécanisme par lequel Epac1 provoque l'hypertrophie pathologique des cardiomyocytes n'est pas complètement élucidé.…”
Section: Epac1 Et Remodelage Pathologique Cardiaqueunclassified