Bioavailability of phthalate and DINCH® plasticizers, after oral administration of dust to piglets.
Toxicol Lett
; 314: 82-88, 2019 Oct 10.
Article
em En
| MEDLINE
| ID: mdl-31306742
ABSTRACT
For decades, phthalates have been widely used as plasticizers in a large number of consumer products, leading to a complex exposure to humans via ingestion, inhalation or dermal uptake. Children may have a higher unintended dust intake per day compared to adults. Therefore, dust intake of children could pose a relevant exposure and subsequently a potential health risk. The aim of this study was to determine the relative bioavailability of certain phthalates, such as di(2-ethylhexyl) phthalate (DEHP), di-isononyl phthalate (DINP) and the non-phthalate plasticizer diisononyl 1,2-cyclohexanedicarboxylic acid (DINCH®, Hexamoll®), after ingestion of dust. Seven 5-week-old male piglets were fed five different dust samples collected from daycare centers. Overall, 0.43â¯g to 0.83â¯g of dust sieved to 63⯵m were administered orally. The piglets' urine was collected over a period of 38â¯h. The excreted metabolites were quantified using an LC-MS/MS method. The mean uptake rates of the applied doses for DEHP, DINP, and DINCH® were 43% ± 11%, 47% ± 26%, and 9% ± 3.5%, respectively. The metabolites of DEHP and DINP showed maximum concentrations in urine after three to five hours, whereas the metabolites of DINCH®, reached maximum concentrations 24â¯h post-dose. The oral bioavailability of the investigated plasticizers was higher compared to the bioaccessibility reported from in vitro digestion tests. Furthermore, the bioavailability of DEHP did not vary substantially between the dust samples, whereas a dose-dependent saturation process for DINP was observed. In addition to other intake pathways, dust could be a source of plasticizers in children using the recent intake rates for dust ingestion.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Ácidos Ftálicos
/
Plastificantes
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Ácidos Cicloexanocarboxílicos
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Ácidos Dicarboxílicos
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Poeira
Tipo de estudo:
Etiology_studies
Limite:
Animals
Idioma:
En
Revista:
Toxicol Lett
Ano de publicação:
2019
Tipo de documento:
Article
País de afiliação:
Alemanha