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Early embryonic exposure of ionizing radiations disrupts zebrafish pigmentation
Umeå University, Faculty of Medicine, Department of Medical Biochemistry and Biophysics.
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2019 (English)In: Journal of Cellular Physiology, ISSN 0021-9541, E-ISSN 1097-4652, Vol. 234, no 1, p. 940-949Article in journal (Refereed) Published
Abstract [en]

Studies have demonstrated that zebrafish are powerful tools for monitoring environmental toxicity, including radiation hazard. Here we investigated the developmental toxicity of ionizing radiation (IR) in an in vivo embryonic zebrafish model. The effects of heavy ion (C-12(6+)), proton, and X-ray radiation on early zebrafish embryos were determined. A similar dose-dependent decrease in the hatch and survival rate of zebrafish embryos was observed after exposure to these irradiations. Exposure of zebrafish embryos to 1-4 Gy IR caused significant loss of pigmentation. Quantitative real-time reverse transcription polymerase chain reaction, western blot analysis, and in situ hybridization (ISH) experiment revealed that atp5 alpha 1 was markedly upregulated in irradiated zebrafish embryos. In addition, IR resulted in a rapid decrease in total adenosine triphosphate (ATP) generation. With dual functions of synthesizing or hydrolyzing ATP, ATP synthase regulated H+ transport crossing the mitochondrial inner. Administration of the mitochondrial ATP synthase inhibitor, oligomycin, partially restored pigmentation in irradiated zebrafish embryos, but the ATPase inhibitor, BTB06584, had no effect. Taken together, these results showed that IR exposure downregulated zebrafish pigmentation through regulation of H+ ion transport in mitochondria.

Place, publisher, year, edition, pages
WILEY , 2019. Vol. 234, no 1, p. 940-949
Keywords [en]
ATP synthase, ionizing radiation, pigmentation, zebrafish
National Category
Developmental Biology
Identifiers
URN: urn:nbn:se:umu:diva-154330DOI: 10.1002/jcp.26922ISI: 000451533300079PubMedID: 30144054OAI: oai:DiVA.org:umu-154330DiVA, id: diva2:1271899
Available from: 2018-12-18 Created: 2018-12-18 Last updated: 2018-12-18Bibliographically approved

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Zhou, Xin

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CiteExportLink to record
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