TABLE 1

Kinetics of bisphenol A glucuronidation by intestinal and hepatic microsomes

SpeciesGenderMicrosome MatrixVmaxKmCLuintaCLh
pmol min1 mg protein1μMμl min1 mg protein1ml min1 g liver1
Liver
    RatMaleNative7552 ± 5534.3 ± 1.218882.0
Alamethicin22,169 ± 10256.4 ± 1.036952.1
FemaleNative20,392 ± 142516.2 ± 2.913422.0
Alamethicin28,607 ± 225821.9 ± 4.113892.0
    HumanMaleNative2077 ± 1863.6 ± 1.26490.9
Alamethicin9409 ± 6055.6 ± 1.318820.9
FemaleNative4255 ± 3754.9 ± 1.59670.9
Alamethicin9389 ± 11957.3 ± 3.214440.9
Intestine
    RatMaleNative6599 ± 30610.7 ± 1.5815b
Alamethicin18,795 ± 183037.0 ± 7.7666
    HumanMixedNative487 ± 11980.1 ± 35.910
Alamethicin660 ± 8841.9 ± 12.626
  • a Unbound fraction of BPA calculated using logP = 3.4 (Austin et al., 2002).

  • b —, not applicable.