Noncovalent Interactions of Long-Chain Perfluoroalkyl Acids with Serum Albumin

Bischel, Heather N.; MacManus-Spencer, Laura A.; Luthy, Richard G.

doi:10.1021/es101334s

Cited by 150 publications

(143 citation statements)

References 45 publications

(82 reference statements)

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“…The observed uniqueness of PFC(A) physical properties is in the properties of the anionic species, not the neutral species. Thus, the agreement between observed tissue-water distributions and the standard BCF model applied to PFCAs could have been anticipated from recent experimental results that are consistent with the neutral species binding with proteins [31,43,52], and with earlier speculation to the same effect [43,53]. The D SW calculated by Equation 2 with an assumed typical sediment solids density of 2.4 kg/L [54,55] allowed the direct comparison of model results with all measured sediment-water distributions reported by Higgins and Luthy [37] in consistent units of L/kg.…”

Section: Resultssupporting

confidence: 71%

Equilibrium modeling: A pathway to understanding observed perfluorocarboxylic and perfluorosulfonic acid behavior

Webster

Ellis

2011

Enviro Toxic and Chemistry

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Equilibrium distribution models of hydrophobic neutral partitioning of the perfluorinated carboxylic and sulfonic acids were shown, without the need for any physical chemical properties, to successfully predict the sediment-water distribution (D(SW) ) directly from independently measured equilibrium tissue distributions known as the bioconcentration factor (BCF). The constant of proportionality required by the models successfully predicted the correlation between the biotic and abiotic distributions of both sets of chemicals, thus demonstrating the applicability of the assumptions inherent in the models, that is, hydrophobically driven partitioning of the neutral species, and thus the applicability of the models themselves. Colloquially speaking, the models are thus validated as applicable to these chemicals. Subsequent application of the standard equilibrium models showed order of magnitude agreement for 83% of measured BCF values and 88% of measured D(SW) for the perfluorinated carboxylic acids, confirming the physical chemical properties used. The applicability of the models to perfluorooctane sulfonic acid (PFOSA) was shown by the successful prediction of D(SW) from BCF. Therefore, the measured D(SW) and BCF could be used to calculate the octanol-water distribution, D(OW) , and hence the corresponding pK(a):K(OW) solution set, thus providing independent experimentally based estimates of these properties. For both the perfluorinated carboxylic and sulfonic acids, the existing standard equilibrium models are shown to be applicable.

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Section: Resultssupporting

confidence: 71%

Equilibrium modeling: A pathway to understanding observed perfluorocarboxylic and perfluorosulfonic acid behavior

Webster

Ellis

2011

Enviro Toxic and Chemistry

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“…C9A binding to BSA or human serum albumin is greater than 99.9% (Bischel et al, 2010). Thus, the free fraction of C8S and C8A are reported as 0.00193 and 0.08 for male rats, respectively (Wambaugh et al, 2013).…”

Section: The Other Pfcsmentioning

confidence: 94%

Tissue toxicokinetics of perfluoro compounds with single and chronic low doses in male rats

et al. 2017

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-To examine the kinetics of low doses of perfluoro compounds (PFCs), we administered perfluorohexanoic acid (C6A), perfluorooctanoic acid (C8A), perfluorononanoic acid (C9A) and perfluorooctane sulfonate (C8S) with a single oral dose (50-100 μg/kg BW), and in drinking water at 1, 5, and 25 μg/L for one and three months to male rats; and examined the distribution in the brain, heart, liver, spleen, kidney, whole blood and serum. C6A was very rapidly absorbed, distributed and eliminated from the tissues with nearly the same tissue t 1/2 of 2-3 hr. Considering serum Vd, and the tissue delivery, C6A was mainly in the serum with the lowest delivery to the brain; and no tissue accumulation was observed in the chronic studies as estimated from the single dose study. For the other PFCs, the body seemed to be an assortment of independent one-compartments with a longer elimination t 1/2 for the liver than the serum. The concentration ratio of liver/serum increased gradually from C 0 to a steady state. The high binding capacity of plasma protein may be the reason for the unusual kinetics, with only a very small fraction of free PFCs moving gradually to the liver. Although the tissue specific distribution was time dependent and different among the PFCs, the Vd and k e of each tissue were constant throughout the study. The possibility of extremely high C6A accumulation in the human brain and liver was suggested, by comparing the steady state tissue concentration of this study with the human data reported by Pérez et al. (2013).

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“…The distribution of PFASs in proteinrich tissues, rather than in fat tissues, and the high affinity to some proteins highlighted the proteinophilic nature of PFASs Bischel et al, 2011Bischel et al, , 2010. Though the serum proteins do not exist in plants, fatty acid binding proteins have been found in plants (Arondel et al, 1990;Rickers et al, 1984).…”

Section: Relationships Between the Contents Of Protein And Lipid And mentioning

confidence: 99%

The roles of protein and lipid in the accumulation and distribution of perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) in plants grown in biosolids-amended soils

Wen

Zhang

et al. 2016

Environmental Pollution

143

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a b s t r a c tThe roles of protein and lipid in the accumulation and distribution of perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) in seven species of plants from biosolids-amended soils were investigated. The PFOS and PFOA root concentration factors (C root /C soil ) ranged from 1.37 to 4.68 and 1.69 to 10.3 (ng/g root )/(ng/g soil ), respectively, while the translocation factors (C shoot /C root ) ranged from 0.055 to 0.16 and 0.093 to 1.8 (ng/g shoot )/(ng/g root ), respectively. The PFOS and PFOA accumulations in roots correlated positively with root protein contents (P < 0.05), while negatively with root lipid contents (P < 0.05). These suggested the promotion effects of protein and inhibition effects of lipid on root uptake. The translocation factors correlated positively with the ratios between protein contents in shoots to those in roots (P < 0.05), showing the importance of protein on PFOS and PFOA translocation. This study is the first to reveal the different roles of protein and lipid in the accumulation and distribution of PFOS and PFOA in plants.

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Noncovalent Interactions of Long-Chain Perfluoroalkyl Acids with Serum Albumin

Cited by 150 publications

References 45 publications

Equilibrium modeling: A pathway to understanding observed perfluorocarboxylic and perfluorosulfonic acid behavior

Equilibrium modeling: A pathway to understanding observed perfluorocarboxylic and perfluorosulfonic acid behavior

Tissue toxicokinetics of perfluoro compounds with single and chronic low doses in male rats

The roles of protein and lipid in the accumulation and distribution of perfluorooctane sulfonate (PFOS) and perfluorooctanoate (PFOA) in plants grown in biosolids-amended soils

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