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Bioorg Med Chem. 2011 Jan 1;19(1):542-6. doi: 10.1016/j.bmc.2010.10.063. Epub 2010 Nov 4.

Vasorelaxant effect of flavonoids through calmodulin inhibition: Ex vivo, in vitro, and in silico approaches.

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Facultad de Farmacia, Universidad Autónoma del Estado de Morelos, Cuernavaca, Morelos 62209, Mexico.


In our search for potential antihypertensive agents, a series of structurally-related flavonoids was screened. Ex vivo and in vitro biological evaluations indicated that compounds 1-7 displayed an important vasorelaxant effect on the endothelium-intact (E(+)) and -denuded (E(-)) aortic rings test. Their in vitro anti-calmodulin (CaM) properties were determined by means of the inhibitory effect on the activation of the calmodulin-sensitive cAMP phosphodiesterase (PDE1) assay. Molecular modeling experiments were also performed in order to explore the probable binding site of 1-7 with CaM, and the results indicated that they could bind to the protein in the same pocket as trifluoperazine (TFP), a well-known CaM inhibitor.

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