Comparative toxicokinetics of bisphenol S and bisphenol AF in male rats and mice following repeated exposure via feed
Creators: name: Waidyanatha, Suramya
name: Black, Sherry R.
name: Croutch, Claire R.
name: Collins, Bradley J.
name: Silinski, Melanie A. R.
name: Kerns, Season
name: Sutherland, Vicki
name: Robinson, Veronica G.
name: Aillon, Kristin
name: Fernando, Reshan A.
name: Mutlu, Esra
name: Fennell, Timothy R.
Publisher: name: Taylor & Francis
Year: 2020
Subjects: subject: Biophysics
subject: Biochemistry
subject: Medicine
subject: Cell Biology
subject: Chemical Sciences not elsewhere classified
subject: Ecology
subject: FOS: Biological sciences
subject: Immunology
subject: FOS: Clinical medicine
subject: Cancer
subject: Virology
subject: Computational Biology

description: We investigated the plasma toxicokinetic behavior of free (parent) and total (parent and conjugated forms) of bisphenol S (BPS) and bisphenol AF (BPAF) in plasma of adult male rats and mice following exposure via feed for 7 days to BPS (338, 1125, and 3375 ppm) or BPAF (338, 1125, and 3750 ppm).In rats, the exposure concentration-normalized maximum concentration [C<sub>max</sub>/D (ng/mL)/(ppm)] and area under the concentration time curve [AUC/D (h × ng/mL)/(ppm)] for free was higher for BPS (C<sub>max</sub>/D: 0.476–1.02; AUC/D: 3.58–8.26) than for BPAF (C<sub>max</sub>/D: 0.017–0.037; AUC/D:0.196–0.436).In mice, the difference in systemic exposure parameters between free BPS (C<sub>max</sub>/D: 0.376–0.459; AUC/D: 1.52–2.54) and free BPAF (C<sub>max</sub>/D: 0.111–0.165; AUC/D:0.846–1.09) was marginal.Elimination half-lives for free analytes (4.41–10.4 h) were comparable between species and analogues.When systemic exposure to free analyte was compared between species, in rats, BPS exposure was slightly higher but BPAF exposure was much lower than in mice.BPS and BPAF were highly conjugated; total BPS AUC values (rats ≥18-fold, mice ≥17-fold) and BPAF (rats ≥127-fold, mice ≥16-fold) were higher than corresponding free values.Data demonstrated that there are analogue and species differences in the kinetics of BPS and BPAF. We investigated the plasma toxicokinetic behavior of free (parent) and total (parent and conjugated forms) of bisphenol S (BPS) and bisphenol AF (BPAF) in plasma of adult male rats and mice following exposure via feed for 7 days to BPS (338, 1125, and 3375 ppm) or BPAF (338, 1125, and 3750 ppm). In rats, the exposure concentration-normalized maximum concentration [C<sub>max</sub>/D (ng/mL)/(ppm)] and area under the concentration time curve [AUC/D (h × ng/mL)/(ppm)] for free was higher for BPS (C<sub>max</sub>/D: 0.476–1.02; AUC/D: 3.58–8.26) than for BPAF (C<sub>max</sub>/D: 0.017–0.037; AUC/D:0.196–0.436). In mice, the difference in systemic exposure parameters between free BPS (C<sub>max</sub>/D: 0.376–0.459; AUC/D: 1.52–2.54) and free BPAF (C<sub>max</sub>/D: 0.111–0.165; AUC/D:0.846–1.09) was marginal. Elimination half-lives for free analytes (4.41–10.4 h) were comparable between species and analogues. When systemic exposure to free analyte was compared between species, in rats, BPS exposure was slightly higher but BPAF exposure was much lower than in mice. BPS and BPAF were highly conjugated; total BPS AUC values (rats ≥18-fold, mice ≥17-fold) and BPAF (rats ≥127-fold, mice ≥16-fold) were higher than corresponding free values. Data demonstrated that there are analogue and species differences in the kinetics of BPS and BPAF.