Studies on animals have shown that the heme oxygenase/ carbon monoxide(HO/CO) system plays an important role in regulating blood pressure. HO catalyzes heme to procuce CO,bilirubin and Fe2+.

• 近年来动物实验发现，内源性血红素氧化酶(Heme Oxygenase，HO)/一氧化碳(Carbon Monoxide，CO)系统在血压调控中起重要作用，即HO催化血红素氧化分解等量的CO、胆红素、Fe~(2+)，CO具有强大的舒血管作用。