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Hepatic Homeostasis of Metal Ions Following Acute Repeated Stress Exposure in Rats.

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cam.issuedOnline2021-12-29
dc.contributor.authorSpiers, Jereme G
dc.contributor.authorTan, Li Si
dc.contributor.authorAnderson, Stephen T
dc.contributor.authorHill, Andrew F
dc.contributor.authorLavidis, Nickolas A
dc.contributor.authorChen, Hsiao-Jou Cortina
dc.contributor.orcidSpiers, Jereme G [0000-0001-5872-8983]
dc.contributor.orcidHill, Andrew F [0000-0001-5581-2354]
dc.contributor.orcidChen, Hsiao-Jou Cortina [0000-0001-6315-9850]
dc.date.accessioned2022-01-10T12:45:01Z
dc.date.available2022-01-10T12:45:01Z
dc.date.issued2021-12-29
dc.date.updated2022-01-10T12:45:00Z
dc.description.abstractEssential metals such as copper, iron, and zinc are cofactors in various biological processes including oxygen utilisation, cell growth, and biomolecular synthesis. The homeostasis of these essential metals is carefully controlled through a system of protein transporters involved in the uptake, storage, and secretion. Some metal ions can be transformed by processes including reduction/oxidation (redox) reactions, and correspondingly, the breakdown of metal ion homeostasis can lead to formation of reactive oxygen and nitrogen species. We have previously demonstrated rapid biochemical responses to stress involving alterations in the redox state to generate free radicals and the resultant oxidative stress. However, the effects of stress on redox-active metals including iron and copper and redox-inert zinc have not been well characterised. Therefore, this study aims to examine the changes in these essential metals following exposure to short-term repeated stress, and to further elucidate the alterations in metal homeostasis through expression analysis of different metal transporters. Outbred male Wistar rats were exposed to unrestrained (control), 1 day, or 3 days of 6 h restraint stress (n = 8 per group). After the respective stress treatment, blood and liver samples were collected for the analysis of biometal concentrations and relative gene expression of metal transporter and binding proteins. Exposure to repeated restraint stress was highly effective in causing hepatic redox imbalance. Stress was also shown to induce hepatic metal redistribution, while modulating the mRNA levels of key metal transporters. Overall, this study is the first to characterise the gene expression profile of metal homeostasis following stress and provide insight into the changes occurring prior to the onset of chronic stress conditions.
dc.identifier.doi10.17863/CAM.79926
dc.identifier.eissn2076-3921
dc.identifier.issn2076-3921
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/332476
dc.languageen
dc.publisherMDPI AG
dc.subjectcopper
dc.subjectessential metals
dc.subjectiron
dc.subjectliver
dc.subjectrat
dc.subjectredox
dc.subjectstress
dc.subjectzinc
dc.titleHepatic Homeostasis of Metal Ions Following Acute Repeated Stress Exposure in Rats.
dc.typeArticle
dcterms.dateAccepted2021-12-28
prism.issueIdentifier1
prism.publicationNameAntioxidants (Basel)
prism.volume11
pubs.funder-project-idUniversity of Queensland Research Grant (n/a)
rioxxterms.licenseref.urihttps://creativecommons.org/licenses/by/4.0/
rioxxterms.versionVoR
rioxxterms.versionofrecord10.3390/antiox11010085

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