Abstract：
:Previous studies from this laboratory have shown that rats with experimental cirrhosis of the liver induced by the combined administration of oral phenobarbital and inhaled carbon tetrachloride show an hyperdynamic status with enhanced cardiac output (CO), and decreased mean arterial pressure (MAP) and peripheral vascular resistance (PVR). Cirrhotic rats also showed an increased vascular permeability. All these phenomena are similar to some of the known effects of the systemic infusion of low doses of synthetic platelet-activating factor into the systemic circulation of normal rats. The measurement of the levels of platelet-activating factor in samples of blood demonstrated significantly higher levels in cirrhotic (2.65 +/- 0.39; n = 10) than in control rats (1.50 +/- 0.57 ng/ml; n = 10; p less than 0.05). The hemodynamic changes induced by the intravenous injection of the platelet-activating factor receptor antagonist BN 52021 (5 mg/kg body weight) have been measured in 10 control and 10 cirrhotic male Wistar rats, using a radioactive microsphere technique. BN 52021 induced no significant hemodynamic changes in control animals. However, in cirrhotic animals it induced a significant decrease in CO with increase in PVR. MAP increased slightly but not significantly. From these data it can be deduced that platelet-activating factor plays a role in the hemodynamic derangement shown by cirrhotic rats and that these derangement can be reversed by BN 52021, a highly selective antagonist of the platelet-activating factor receptor.
journal_name
Life Scijournal_title
Life sciencesauthors
Villamediana LM,Sanz E,Fernandez-Gallardo S,Caramelo C,Sanchez Crespo M,Braquet P,Lopez-Novoa JMdoi
10.1016/0024-3205(86)90531-xsubject
Has Abstractpub_date
1986-07-21 00:00:00pages
201-5issue
3eissn
0024-3205issn
1879-0631pii
0024-3205(86)90531-Xjournal_volume
39pub_type
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