Abstract
1. Ascorbic acid at high non-physiological levels inhibited the sulphation of 4-hydroxybiphenyl by rat isolated hepatocytes.
2. Glucuronylation of 4-hydroxybiphenyl, formed from 4-methoxybiphenyl, was increased at ascorbic acid lev`els which inhibited sulphation.
3. The glucuronylation of 4-hydroxybiphenyl added directly to the cells was enhanced at concentrations of ascorbic acid which did not inhibit sulphation.
4. Ascorbic acid did not influence the cytochrome P-450-dependent O-demethylation of 4-methoxybiphenyl or the level of cellular lipid peroxidation.