Systemic availability of propionate and acetate in liver cirrhosis.

In 15 patients with cirrhosis of the liver and 10 control subjects, 7.5 mmol sodium propionate and 7.5 mmol sodium acetate were instilled endoscopically into the duodenum. Venous concentrations of propionate and acetate were measured for 90 min after administration of the enteral dose by gas-liquid chromatography. In patients with liver cirrhosis, propionate rose from a basal value of 6.1 +/- 4.7 (SD) microM to a peak concentration of 50.1 +/- 25.6 microM, whereas, in controls, it rose only from 1.4 +/- 1.6 to 10.3 +/- 7.6 microM. The oral propionate clearance was significantly lower in patients with cirrhosis (4.51 +/- 1.63 L/min) than in controls (118.47 +/- 154.79 L/min). Acetate went up from 39.5 +/- 16.3 to 134.1 +/- 62.7 microM in patients with cirrhosis and from 60.9 +/- 19.0 to 102.0 +/- 44.0 microM in controls. The oral acetate clearance was lower in patients with liver cirrhosis (2.80 +/- 2.17 L/min) than in control persons (10.86 +2- 5.72 L/min). The differences between the groups were more striking for propionate than for acetate values. It is concluded that the systemic availability of propionate and acetate is higher in patients with liver cirrhosis than in controls. This may be due to portosystemic shunting and/or diminished hepatic and extrahepatic extraction of the acids.