Figure 4.

Endothelial vasoactive factors and smooth muscle BKCa activity. 20-HETE, 20-hydroxyeicosatetraenoic acid; BKCa, calcium-activated potassium channels of large conductance; cAMP, cyclic-adenosine monophosphate; cGMP, cyclic-guanosine monophosphate; COX, cyclooxygenase; EC, endothelial cell; EDCFs, endothelium-derived contracting factors; EDRFs, endothelium-derived relaxing factors; EETs, epoxyeicosatrienoic acids; eNOS, endothelial nitric oxide synthase; GS, G-protein S; GSα, α subunit of G-protein S; H2O2, hydrogen peroxide; IP, prostcyclin receptor; NO, nitric oxide; NOX, NADPH oxidase; P450 2C-2J or 4A, cytochrome P450 monooxygenase 2C, 2J or 4A; PGI2, prostacyclin; R?, putative receptor; ROS, reactive oxygen species; sGC, soluble guanylate cyclase; SOD, superoxide dismutase; TP, thromboxane/endoperoxide receptor; TRPV4, vanilloid transient receptor potential channel 4; VSMC, vascular smooth muscle cell; XO, xanthine oxidase.