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Bisphenol A at a human exposed level can promote epithelial-mesenchymal transition in papillary thyroid carcinoma harbouring BRAFV600E mutation.


ABSTRACT: Bisphenol A (BPA), a ubiquitous endocrine-disrupting chemical, alters the function of endocrine system and enhances the susceptibility to tumorigenesis in several hormone-dependent tumours as thyroid carcinoma. About 50% of papillary thyroid cancers (PTC), the most common type of thyroid malignancy, harbours the BRAFV600E mutation. This study aimed to investigate a potential combined effect of BPA exposure and BRAFV600E mutation on epithelial-mesenchymal transition (EMT) in PTC. Firstly, the level of BPA in plasma, the evaluation of BRAFV600E mutation and the level of EMT-related proteins in PTC samples were individually determined. Additionally, the migration, invasion, colony formation capacity and the expression of EMT-related proteins after exposure to BPA were precisely analysed in vitro thyroid cells genetically modified by the introduction of BRAFV600E mutation. Moreover, ERK-Cox2 signalling pathway was also introduced to explore the possible mechanism in PTC development. As expected, whether the clinical investigation or cultured thyroid cells demonstrated that BPA at a concentration compatible with human exposed levels (10-7  M) synergized with the BRAFV600E mutation promoted EMT via the activation of ERK-Cox2 signalling pathway. Our findings offer some evidence that BPA as an environmental risk factor can facilitate the progression of PTC harbouring BRAFV600E mutation.

SUBMITTER: Li L 

PROVIDER: S-EPMC7875916 | biostudies-literature | 2021 Feb

REPOSITORIES: biostudies-literature

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Bisphenol A at a human exposed level can promote epithelial-mesenchymal transition in papillary thyroid carcinoma harbouring BRAF<sup>V600E</sup> mutation.

Li Liuli L   Li Hao H   Zhang Jun J   Gao Xin X   Jin Hao H   Liu Renqi R   Zhang Zhen Z   Zhang Xuan X   Wang Xichang X   Qu Peng P   Zhao Yuejiao Y   Lu Xiaobo X  

Journal of cellular and molecular medicine 20210119 3


Bisphenol A (BPA), a ubiquitous endocrine-disrupting chemical, alters the function of endocrine system and enhances the susceptibility to tumorigenesis in several hormone-dependent tumours as thyroid carcinoma. About 50% of papillary thyroid cancers (PTC), the most common type of thyroid malignancy, harbours the BRAF<sup>V600E</sup> mutation. This study aimed to investigate a potential combined effect of BPA exposure and BRAF<sup>V600E</sup> mutation on epithelial-mesenchymal transition (EMT) in  ...[more]

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