Does hepatotoxicity interfere with endocrine activity in zebrafish (Danio rerio)?

Baumann, Lisa; Holbech, Henrik; Schmidt-Posthaus, Heike; Moissl, Angela P; Hennies, Mark; Tiedemann, Janina; Weltje, Lennart; Segner, Helmut; Braunbeck, Thomas (2020). Does hepatotoxicity interfere with endocrine activity in zebrafish (Danio rerio)? Chemosphere, 238, p. 124589. Elsevier 10.1016/j.chemosphere.2019.124589

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Vitellogenin (VTG), a well-established biomarker for the diagnosis of endocrine activity in fish, is used in multiple OECD test guidelines (TG) to identify activities of chemicals on hormonal pathways. However, the synthesis of VTG may not only be modified by typical endocrine-related pathways, but also through non-endocrine-mediated processes. In particular, hepatotoxicity, i.e. toxicant-induced impairment of liver structure and function, might influence VTG as a biomarker, since VTG is synthesized in hepatocytes. An intimate understanding of the interplay between endocrine-related and non-endocrine-related pathways influencing VTG production is crucial for the avoidance of erroneous diagnoses in hazard assessment for regulatory purposes of chemical compounds. In order to investigate whether hepatotoxicity may interfere with hepatic VTG synthesis, adult zebrafish (Danio rerio) were exposed to three well-known hepatotoxicants, acetaminophen, isoniazid and acetylsalicylic acid, according to OECD TG 230. Various hepatotoxicity- and endocrine system-related endpoints were recorded: mRNA expression of selected endocrine- and hepatotoxicity-related marker genes in the liver; VTG levels in head/tail homogenates; and liver histopathology. All three test compounds induced significant, but mild single cell necrosis of hepatocytes and transcriptional changes of hepatotoxicity-related marker genes, thus confirming hepatotoxic effects. A positive correlation between hepatotoxicity and reduced hepatic VTG synthesis was not observed, with the single exception of a weak increase in female zebrafish exposed to APAP. This suggests that - in studies conducted according to OECD TG 229 or 230 - it is unlikely that hepatotoxic chemicals will interfere with the hepatic capacity for VTG synthesis.

Item Type:

Journal Article (Original Article)

Division/Institute:

05 Veterinary Medicine > Department of Infectious Diseases and Pathobiology (DIP) > Center for Fish and Wildlife Health (FIWI)

UniBE Contributor:

Schmidt-Posthaus, Heike and Segner, Helmut

Subjects:

500 Science > 570 Life sciences; biology
600 Technology > 630 Agriculture

ISSN:

0045-6535

Publisher:

Elsevier

Language:

English

Submitter:

Achim Braun Parham

Date Deposited:

31 Mar 2020 16:07

Last Modified:

05 Apr 2020 02:49

Publisher DOI:

10.1016/j.chemosphere.2019.124589

PubMed ID:

31437630

Uncontrolled Keywords:

Acetaminophen Acetylsalicylic acid Endocrine disruption Isoniazid Liver Vitellogenin

BORIS DOI:

10.7892/boris.141731

URI:

https://boris.unibe.ch/id/eprint/141731

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