PuSH - Publication Server of Helmholtz Zentrum München

Fernsebner, K. ; Zorn, J. ; Kanawati, B. ; Walker, A. ; Michalke, B.

Manganese leads to an increase in markers of oxidative stress as well as to a shift in the ratio of Fe(ιι)/(ιιι) in rat brain tissue.

Metallomics 6, 921-931 (2014)
Publ. Version/Full Text Volltext DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
Occupationally or environmentally caused chronic exposure to Manganese (Mn) can lead to a degeneration of dopaminergic neurons inducing a Parkinson-like complaint called manganism. Deciphering the ongoing neurodegenerative mechanisms in the affected brain is still a major task for understanding the complex modes of action. Therefore, we applied a non-toxic, oral feeding in rats simulating a chronic exposure to Mn. Analysis of brain extracts by electrospray ionization Fourier transform resonance mass spectrometry (ESI-FT-ICR-MS) revealed an increase in markers of oxidative stress like glutathione disulfide (GSSG), prostaglandins, and 15(S)-HETE, a marker of lipid peroxidation. Furthermore, acetylcholinesterase (AchE) activity and glutamate concentrations were elevated in brain samples of Mn-supplemented rats, suggesting oxidative stress in the brain tissue. Application of ion chromatography coupled to inductively coupled plasma-optical emission spectrometry (IC-ICP-OES) further showed a shift of Fe(iii) towards Fe(ii) in the brain samples enabling for example the action of the Fenton reaction. This is the first time that changes in the Fe-species distribution could be related to Mn-induced neuroinflammation and is therefore enlarging the knowledge of this complex neurodegenerative condition. The combination of our findings provides substantial evidence that Mn-induced neuroinflammation leads to oxidative stress triggered by multifactorial pathophysiological processes.
Altmetric
Additional Metrics?
[➜Log in]
Edit extra informations Login
Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Central-nervous-system; Alzheimers-disease; Induced Neurotoxicity; Nitric-oxide; In-vitro; Choline-acetyltransferase; Parkinsons-disease; Glutamate; Iron; Exposure
ISSN (print) / ISBN 1756-5901
e-ISSN 1756-591X
Journal Metallomics
Quellenangaben Volume: 6, Issue: 4, Pages: 921-931 Article Number: , Supplement: ,
Publisher Royal Society of Chemistry (RSC)
Publishing Place Cambridge
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Research Unit Analytical BioGeoChemistry (BGC)
CF Comparative Medicine (CF-Comparative Medicine)