Evaluation of a panel of in vitro methods for assessing thyroid receptor ß and transthyretin transporter disrupting activities.
Reprod Toxicol
; 96: 432-444, 2020 09.
Article
em En
| MEDLINE
| ID: mdl-31077750
ABSTRACT
We developed a thyroid testing panel to assess endocrine disrupting chemicals (EDCs) capacities to bind either the thyroid receptor ß (TRß) or the thyroid hormones transporter transthyretin (TTR). We first stably transfected a human U2OS cell line with TRß and a luciferase reporter construct to develop the TRß CALUX® reporter gene assay to assess chemicals' potential to interact with TRß. Secondly, we combined a TTR-binding assay with the TRß CALUX (TTR-TRß CALUX) and optimized the system to evaluate the competitive properties of EDCs towards T4 for TTR binding. Both systems were evaluated with a range of known thyroid-disrupting compounds. The agonistic/antagonistic TRß CALUX successfully predicted 9/9 and 9/12 test compounds, respectively. The TTR-TRß CALUX predicted 9/9 compounds and demonstrated competitive activities when analyzing waste water samples. We concluded that the proposed test battery is a promising screening method able to efficiently generate data on thyroid hormone interferences by chemicals.
Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Hormônios Tireóideos
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Bioensaio
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Pré-Albumina
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Receptores beta dos Hormônios Tireóideos
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Disruptores Endócrinos
Limite:
Humans
Idioma:
En
Ano de publicação:
2020
Tipo de documento:
Article