A reduction of BK levels could result in endothelial dysfunction because BK activation of BDKRB2 induces the release of nitrogen oxide, prostacyclin, endothelium-derived hyperpolarizing factor, and tissue plasminogen activator, which exert diverse physiological actions on the cardiovascular system, including regulation of vascular tone and local blood flow to organs, coagulation, fibrinolysis, and water-electrolyte balance (35). The gene discussed is KNG1; the disease is endothelial dysfunction.