Xenobiotic-metabolizing enzymes in the skin of rat, mouse, pig, guinea pig, man, and in human skin models
1 A modified technique for the measurement of O-dealkylase (ODA) activity in crude homogenates is reported, and its application to skin is described. 2 Large differences in ODA levels were found between different species, no activity being observed in the skin of primates. 3 Induction of cutaneous ODA in mice was achieved by the subcutaneous injection of phenobarbitone, hexachlorobenzene or 20-methylcholanthrene. 4 Attempts to induce ODA in vitro were unsuccessful.