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Disruption of liver development and coagulation pathway by ochratoxin A in embryonic zebrafish.

Abstract：

:Ochratoxin A (OTA) is a mycotoxin that is found in various food and feed products. The molecular mechanisms that are associated with OTA hepatotoxicity and teratogenicity have not been extensively elucidated in a developing organism. In this study, the transcriptomic profile of zebrafish embryos indicates that hemostasis and blood coagulation are the top two pathways affected by OTA. The treatment of embryos with OTA was able to decrease the expression of genes that encode coagulation factors and liver markers, including f7, f9b, cp and vtna. OTA also weakened the signal of liver-specific microRNA-122. OTA administration not only reduced the size of a developing embryonic liver, but also decreased the number of phosphorylated histone H3-positive cells by immunohistochemical staining. OTA suppressed the expression of hhex and prox1, two critical transcriptional factors during hepatoblast specification, in the developing liver, but did not alter the insulin signal in the pancreas. In vitro analysis with zebrafish liver (ZFL) cells indicated that OTA blocked the expression of f7, fgb and liver markers. In summary, OTA exposure resulted in the generation of small livers which led to deficiency of coagulation factors in embryonic zebrafish. Impairment of hhex and prox1 gene expression and hepatocyte proliferation contributed to the disruption of liver development mediated by OTA.

journal_name

Toxicol Appl Pharmacol

journal_title

Toxicology and applied pharmacology

authors

Wu TS,Lin YT,Huang YT,Cheng YC,Yu FY,Liu BH

doi

10.1016/j.taap.2017.12.012

subject

Has Abstract

pub_date

2018-02-01 00:00:00

pages

1-8

eissn

0041-008X

issn

1096-0333

pii

S0041-008X(17)30493-3

journal_volume

340

pub_type

杂志文章

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