Cited by 392Per- and polyfluoroalkyl substances researchToxic Organic Pollutants ImpactFluoride Effects and Removal

TOXICITY AND TOXICOKINETICS OF PERFLUOROOCTANOIC ACID IN HUMANS AND ANIMALS

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KUDO, Naomi, KAWASHIMA, Yoichi·2003·The Journal of Toxicological Sciences

Abstract

Perfluorooctanoic acid (PFOA) is an octanoic acid derivative to which all aliphatic hydrocarbons are substituted by fluorine. PFOA and its salts are commercially used in various industrial processes. The chemical is persistent in the environment and does not undergo biotransformation. It was reported that PFOA is found not only in the serum of occupationally exposed workers but also general populations. Recent studies have suggested that the biological half-life of PFOA in humans is 4.37 years based on study of occupationally exposed workers. It is increasingly suspect that PFOA accumulates and affects human health, although the toxicokinetics of PFOA in humans remain unclear. In experimental animals, PFOA seems low in toxicity. PFOA is well-absorbed following oral and inhalation exposure, and to a lesser extent following dermal exposure. Once absorbed in the body, it distributes predominantly to the liver and plasma, and to a lesser extent the kidney and lungs. PFOA is excreted in both urine and feces. Biological half-life of PFOA is quite different between species and sexes and the difference is due mainly to the difference in renal clearance. In rats, renal clearance of PFOA is regulated by sex hormones, especially testosterone. PFOA is excreted into urine by active tubular secretion, and certain organic anion transporters are though to be responsible for the secretion. Fecal excretion is also important in the elimination of PFOA. There is evidence that PFOA undergoes enterohepatic circulation resulting in reduced amounts of fecal excretion. Elucidation of the mechanisms of transport in biological systems leads to elimination and detoxification of this chemical in the human body.

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Crossref · 10.2131/jts.28.49

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  • Urinary excretion, facilitated by renal tubular organic anion transporters (OATs), is considered the predominant elimination route for most PFAS in both animal models and human studies.

    “Urinary excretion, facilitated by renal tubular organic anion transporters (OATs), is considered the predominant elimination route for most PFAS in both animal models and human studies (Kudo and Kawashima, 2003).”

    From Estimation of per- and polyfluoroalkyl substances (PFAS) half-lives in human studies: a systematic review and meta-analysis (2024) · cites this paper as Kudo and Kawashima, 2003

    The Elimination section reports urinary excretion of PFOA in rats and identifies organic anion transporters 2 and 3 as candidate renal transporters. It does not establish that urine is the predominant elimination route for most PFAS in animals and humans: the paper concerns PFOA, reports substantial fecal excretion, and says human PFOA toxicokinetics remain unclear. No page number is available in our copy. (LLM, conf=0.89)

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  • An increase in xenobiotic metabolism is not likely to be relevant for PFOS concentrations in the body, as PFAAs are resistant to enzymatic metabolism.

    “While potentially important for BDE-47, an increase in xenobiotic metabolism is not likely to be relevant for PFOS concentrations in the body, as PFAAs are resistant to enzymatic metabolism (Kudo and Kawashima, 2003; Lau et al., 2007).”

    From A Critical Review and Meta-Analysis of Impacts of Per- and Polyfluorinated Substances on the Brain and Behavior (2022) · cites this paper as Kudo and Kawashima, 2003

    The Metabolism and Elimination sections report that PFOA was found as the parent compound and is excreted without biotransformation. That supports the rationale for PFOA, but the paper does not establish that increased xenobiotic metabolism is irrelevant to PFOS concentrations or that all PFAAs resist enzymatic metabolism. Page numbers are not available in our copy. (LLM, conf=0.88)

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  1. Olsen, G.W., Burris, J.M., Lundberg, J.K., Hansen, K.J., Mandel, J.H. and Zobel, L.R. (2002b): Identification of fluorochemicals in human sera. II. Elderly participants of adult changes in thought study. Final Report, 3M Medical Vol. 28 No. 2

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Authors
KUDO, N., & KAWASHIMA, Y.
Affiliations
Department of Toxicology and Applied Pharmacology, Faculty of Pharmaceutical Sciences
Venue
The Journal of Toxicological Sciences
Published
2003
Volume
28
Issue
2
Pages
49-57
ISSN
  • 0388-1350 (ISSN-L)
  • 1880-3989
OpenAlex
W2053849036
Cited by
392
References
23
Citations by year
2026: 7 · 2025: 16 · 2024: 19 · 2023: 17 · 2022: 21 · 2021: 23 · 2020: 21 · 2019: 19 · 2018: 14 · 2017: 12 · 2016: 14 · 2015: 13 · 2014: 23 · 2013: 25 · 2012: 25
FWCI
1.29
Type
journal article
Language
en
Open access
Locations
  • The Journal of Toxicological Sciences (publishedVersion)
  • PubMed (publishedVersion)
  • Institutional Repositories DataBase (IRDB) (publishedVersion)
  • Josai University Repository of Academia (Josai University) (submittedVersion)
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
perfluorooctanoic acid, toxicokinetics, biological half-life, renal clearance, sex differences, testosterone, organic anion transporters, renal tubular secretion, enterohepatic circulation, occupational exposure, environmental persistence
MeSH terms
Animals, Caprylates, Carcinogens, Fluorocarbons, Humans, Teratogens, Tissue Distribution

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