Cited by 49Per- and polyfluoroalkyl substances researchToxic Organic Pollutants ImpactFluoride Effects and Removal

Exploring Route-Specific Pharmacokinetics of PFAS in Mice by Coupling in Vivo Tests and Physiologically Based Toxicokinetic Models

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Zhu, Yumin, Pan, Xiaoyu, Jia, Yibo, Yang, Xin, Song, Xiaohua, Ding, Jiaqi, Zhong, Wenjue, Feng, Jianfeng +1 more·2023·Environmental Health Perspectives

Abstract

BACKGROUND: Oral ingestion, inhalation, and skin contact are important exposure routes for humans to uptake per- and polyfluoroalkyl substances (PFAS). However, nasal and dermal exposure to PFAS remains unclear, and accurately predicting internal body burden of PFAS in humans via multiple exposure pathways is urgently required. OBJECTIVES: We aimed to develop multiple physiologically based toxicokinetic (PBTK) models to unveil the route-specific pharmacokinetics and bioavailability of PFAS via respective oral, nasal, and dermal exposure pathways using a mouse model and sought to predict the internal concentrations in various tissues through multiple exposure routes and extrapolate it to humans. METHODS: Mice were administered the mixed solution of perfluorohexane sulfonate, perfluorooctane sulfonate, and perfluorooctanoic acid through oral, nasal, and dermal exposure separately or jointly. The time-dependent concentrations of PFAS in plasma and tissues were determined to calibrate and validate the individual and combined PBTK models, which were applied in single- and repeated-dose scenarios. RESULTS: The developed route-specific PBTK models successfully simulated the tissue concentrations of PFAS in mice following single or joint exposure routes as well as long-term repeated dose scenarios. The time to peak concentration of PFAS in plasma via dermal exposure was much longer (34.1-83.0 h) than that via nasal exposure (0.960 h). The bioavailability of PFAS via oral exposure was the highest (73.2%-98.0%), followed by nasal (33.9%-66.8%) and dermal exposure (4.59%-7.80%). This model was extrapolated to predict internal levels in human under real environment. DISCUSSION: Based on these data, we predict the following: PFAS were absorbed quickly via nasal exposure, whereas a distinct hysteresis effect was observed for dermal exposure. Almost all the PFAS to which mice were exposed via gastrointestinal route were absorbed into plasma, which exhibited the highest bioavailability. Exhalation clearance greatly depressed the bioavailability of PFAS via nasal exposure, whereas the lowest bioavailability in dermal exposure was because of the interception of PFAS within the skin layers. https://doi.org/10.1289/EHP11969.

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  • The mouse-to-human extrapolation of PFAS plasma kinetics was supported by a physiologically based toxicokinetic model that was validated against the in vivo data.

    “To ensure accuracy of the mouse to human PFAS extrapolation in plasma, a physiologically based toxicokinetic model was established.”

    From Adverse health effects of PFAS (2025) · cites this paper as [4]

    The Methods section ‘Extrapolating from Mouse to Human’ describes extrapolating the mouse PBTK model to humans and validating the human model against observed population data. The Results section ‘Prediction of the Repeated Exposure in Mouse and Extrapolation to Human’ also compares model predictions with measured animal concentrations. However, the human extrapolation and validation described here are for PFOS specifically, not PFAS generally. (LLM, conf=0.84)

    Experimental — accuracy not yet measured
  • The human PBTK model demonstrated that oral intake was the primary route for PFOS accumulation in human plasma.

    “In this case, the human PBTK model demonstrated that oral intake was the primary route for PFOS accumulation in human plasma.”

    From Adverse health effects of PFAS (2025) · cites this paper as [4]

  • In Zhu et al.'s study, PFHxS reached the highest concentration in plasma, while PFOS was greatest in the liver.

    “Among the different types of Per- and Polyfluoroalkyl substances, PFHxS was at the highest concentration in plasma, while PFOS was greatest in the liver.”

    From Adverse health effects of PFAS (2025) · cites this paper as [4]

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Authors
Zhu, Y., Pan, X., Jia, Y., Yang, X., Song, X., Ding, J., Zhong, W., Feng, J., & Zhu, L.
Affiliations
  • Nankai University (CN)
  • Beijing Sankuai Online Technology Co., Ltd., Beijing, P. R. China
Corresponding author
Zhu, Lingyan
Venue
Environmental Health Perspectives
Published
2023-12
Volume
131
Issue
12
Pages
127012-127012
ISSN
  • 0091-6765 (ISSN-L)
  • 1552-9924
OpenAlex
W4389671196
Cited by
49
References
90
Citations by year
2026: 18 · 2025: 22 · 2024: 9
FWCI
4.22
Type
journal article
Language
en
Open access
Licence
public-domain
Locations
  • Environmental Health Perspectives (publishedVersion, public-domain)
  • PubMed Central (publishedVersion, public-domain)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (T2017002, 2019YFC1804203, NSFC 41991313, 41991313, 22111530176)
  • Nankai University (T2017002)
  • Fundamental Research Funds for the Central Universities (T2017002)
Topics
  • Physical Sciences › Environmental Science › Environmental Chemistry › Per- and polyfluoroalkyl substances research
  • Physical Sciences › Environmental Science › Health, Toxicology and Mutagenesis › Toxic Organic Pollutants Impact
  • Physical Sciences › Environmental Science › Water Science and Technology › Fluoride Effects and Removal
Keywords
per- and polyfluoroalkyl substances, PFAS, physiologically based toxicokinetic model, nasal exposure, dermal exposure, oral exposure, bioavailability, PFHxS, PFOS, perfluorooctanoic acid, tissue distribution, hysteresis, repeated-dose exposure
MeSH terms
Environmental Pollutants, Fluorocarbons, Humans, Alkanesulfonic Acids, Toxicokinetics

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