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PGE2 receptors, chloride channels   Cui Yang

PGE2 receptors, chloride channels

196 страниц. 2011 год.
LAP Lambert Academic Publishing
Endothelial cells play a central role in cardiovascular homeostasis by generation of numerous vasoconstrictors and vasodilators. One of the vasodilators is the endothelium-derived hyperpolarizing factor (EDHF). The identity of EDHF is not completely clear but a widely accepted candidate is epoxyeicosatrienoic acids (EETs). Firstly, we convincingly showed that the relaxing effect of 14,15-EET is mediated through the Gs protein-coupled EP2 receptors which were linked to the cAMP/PKA-dependent pathway. Secondly, we demonstrated that the effects of arterial size, aging and hypertension on the vasorelaxing response of EETs were due to the different expressions of EP2 receptor. Thirdly, whole-cell patch clamp study demonstrated that EETs inhibited volume-activate Cl- channels in rat mesenteric arterial smooth muscle cells through a cGMP and cAMP-dependent pathway. Finally, we showed the inhibition of Cl- channels potentiated the EDHF-mediated relaxation in rat mesenteric arteries. The...
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