Circulating levels of vasoactive intestinal polypeptide in liver disease

Abstract
In animals, the effects of vasoactive intestinal polypeptide (VIP) include peripheral vasodilation, hyperdynamic circulation, hyperglycemia and hyperventilation. Because these phenomena are noted in patients with cirrhosis, it has been postulated that VIP might be escaping hepatic inactivation and entering the systemic circulatory system and contributing to these abnormalities. VIP levels were studied in patients with cirrhosis, acute liver disease and chronic illnesses with secondary liver involvement. Patients with cirrhosis and those with acute liver disease or chronic illnesses with secondary hepatic involvement have a wide range of VIP levels with mean values significantly above that of normal individuals and patients with chronic illness and no liver involvement.