NDLI: (1)H NMR brain metabonomics of scrapie exposed sheep.

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Scano, Paola Rosa, Antonella Incani, Alessandra Maestrale, Caterina Santucciu, Cinzia Perra, Daniela Vascellari, Sarah Pani, Alessandra Ligios, Ciriaco
Description	Country affiliation: Italy Author Affiliation: Scano P ( Department of Chemical and Geological Sciences, University of Cagliari, Monserrato, Italy. scano@unica.it.)
Abstract	While neurochemical metabolite modifications, determined by different techniques, have been diffusely reported in human and mice brains affected by transmissible spongiform encephalopathies (TSEs), this aspect has been little studied in the natural animal hosts with the same pathological conditions so far. Herein, we investigated, by high resolution (1)H NMR spectroscopy and multivariate statistical data analysis, the brain metabolite profile of sheep exposed to a scrapie agent in a naturally affected flock. On the basis of clinical examinations and western blotting analysis for the pathological prion protein (PrP(Sc)) in brain tissues, sheep were catalogued as not infected (H), infected with clinical signs (S), and infected without clinical signs (A). By discriminant analysis of spectral data, comparing S vs. H, we found a different metabolite distribution, with inosine, cytosine, creatine, and lactate being higher in S than in H brains, while the branched chain amino acids (leucine, isoleucine, and valine), phenylalanine, uracil, tyrosine, gamma-amino butyric acid, total aspartate (aspartate + N-acetyl aspartate) being lower in S. By a soft independent modelling of class analogy approach, 1 out of 3 A samples was assigned to class H. Furthermore, A brains were found to be higher in choline and choline-containing compounds. By means of partial least squares regression, an excellent correlation was found between the PrP(Sc) amount and the (1)H NMR metabolite profile of infected (S and A) sheep, and the metabolite mostly correlated with PrP(Sc) was alanine. The overall results, obtained using different chemometric tools, were able to describe a brain metabolite profile of infected sheep with and without clinical signs, compared to healthy ones, and indicated alanine as a biomarker for PrP(Sc) amounts in scrapie brains.
File Format	HTM / HTML
ISSN	1742206X
Issue Number	7
Volume Number	11
e-ISSN	17422051
Journal	Molecular BioSystems
Language	English
Publisher	Royal Society of Chemistry
Publisher Date	2015-07-01
Publisher Place	Great Britain (UK)
Access Restriction	Subscribed
Subject Keyword	Discipline Molecular Biology Discipline Biochemistry Brain Metabolism Metabolome Scrapie Amino Acids Animals Case-control Studies Metabolomics Prpsc Proteins Proton Magnetic Resonance Spectroscopy Sheep Journal Article
Content Type	Text
Resource Type	Article
Subject	Molecular Biology Biotechnology

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