Effect of Carbon Tetrachloride Upon Glucuronide Formation by Guinea Pig Liver.

Abstract
Guinea pigs were injected with CCl4 intravenously (0.1 ml/kg). Glucuronyl transferase activity was then measured in whole homogenates and in isolated microsomes using p-nitrophenol as substrate. Reduction in enzyme activity was apparent in 24 hours but demonstrable as early as 2 hours after injection. Glucuronyl transferase activity of isolated microsomes was not diminished. The reduction in hepatic glucuronide conjugation induced by CCl4 was due to a quantitative change in microsomal activity rather than to a qualitative one.