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Loss of slc39a14 causes simultaneous manganese hypersensitivity and deficiency in zebrafish

Tuschl, Karin; White, Richard J; Trivedi, Chintan; Valdivia, Leonardo E; Niklaus, Stephanie; Bianco, Isaac H; Dadswell, Chris; ... Busch-Nentwich, Elisabeth M; + view all (2022) Loss of slc39a14 causes simultaneous manganese hypersensitivity and deficiency in zebrafish. Disease Models and Mechanisms 10.1242/dmm.044594. (In press). Green open access

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Abstract

Manganese neurotoxicity is a hallmark of Hypermanganesemia with Dystonia 2, an inherited manganese transporter defect caused by mutations in SLC39A14. To identify novel potential targets of manganese neurotoxicity we performed transcriptome analysis of slc39a14-/- mutant zebrafish unexposed and exposed to MnCl2. Differentially expressed genes mapped to the central nervous system and eye, and pathway analysis suggested that calcium dyshomeostasis and activation of the unfolded protein response are key features of manganese neurotoxicity. Consistent with this interpretation, MnCl2 exposure led to decreased whole animal calcium levels, locomotor defects and changes in neuronal activity within the telencephalon and optic tectum. In accordance with reduced tectal activity, slc39a14-/- zebrafish showed changes in visual phototransduction gene expression, absence of visual background adaptation and a diminished optokinetic reflex. Finally, numerous differentially expressed genes in mutant larvae normalised upon MnCl2 treatment indicating that, in addition to neurotoxicity, manganese deficiency is present either subcellularly or in specific cells or tissues. Overall, we assembled a comprehensive set of genes that mediate manganese-systemic responses and found a highly correlated and modulated network associated with calcium dyshomeostasis and cellular stress.

Type: Article
Title: Loss of slc39a14 causes simultaneous manganese hypersensitivity and deficiency in zebrafish
Location: England
Open access status: An open access version is available from UCL Discovery
DOI: 10.1242/dmm.044594
Publisher version: https://doi.org/10.1242/dmm.044594
Language: English
Additional information: © 2022. Published by The Company of Biologists Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution and reproduction in any medium provided that the original work is properly attributed.
Keywords: Calcium, Manganese, Transcriptome, Zebrafish, slc39a14
UCL classification: UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Cell and Developmental Biology
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences
UCL
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences
UCL > Provost and Vice Provost Offices > School of Life and Medical Sciences > Faculty of Life Sciences > Div of Biosciences > Neuro, Physiology and Pharmacology
URI: https://discovery.ucl.ac.uk/id/eprint/10148179
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