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Trace element concentration differences in regions of human brain by INAA

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Abstract

Studies have shown that there is a potential relationship between the levels of trace elements in cerebral tissues and neurological disorders. However, there are few publications available on the elemental composition of these tissues as well as for different regions of the brain. The aim of this study was to investigate trace element differences in various regions of the human brain from an elderly population of normal individuals. Brain samples from 31 individuals of both genders, aged 51–95 years were provided by the Brain Bank of the Brazilian Aging Study Group of the São Paulo University, Medical School. The tissues from the regions of the hippocampus, cerebellum and frontal, parietal, temporal, occipital cortex were dissected using a titanium knife, ground, freeze-dried and then analyzed by instrumental neutron activation analysis (INAA). Samples and element standards were irradiated with a neutron flux at the IEA-R1 nuclear research reactor for Br, Fe, K, Na, Rb, Se and Zn determinations. One-way ANOVA test (p < 0.05) was used to compare the results which showed significant differences for several elements among the brain regions. Most of our brain analysis results agreed with the literature data. The results were also submitted for brain region classification by cluster analysis.

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Acknowledgments

Authors are indebted to the São Paulo Research Foundation (FAPESP) and the Brazilian National Council for Scientific and Technological Development (CNPq) for the financial support. To the Brain Bank of the Brazilian Aging Study Group (BBBABSG) of the Medical School, São Paulo University for the brain samples.

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Authors and Affiliations

  1. Instituto de Pesquisas Energéticas e Nucleares, IPEN-CNEN/SP, Av. Prof. Lineu Prestes 2242, São Paulo, SP, 05508-000, Brazil

    M. Saiki & F. A. Genezini

  2. Faculdade de Medicina, Universidade de São Paulo, Rua Dr Enéas de Carvalho Aguiar 155, Cerqueira César, São Paulo, SP, 05403-010, Brazil

    R. E. P. Leite, L. T. Grinberg, R. E. L. Ferretti, J. M. Farfel, C. Suemoto, C. A. Pasqualucci & W. Jacob-Filho

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  1. M. Saiki
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  2. R. E. P. Leite
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  3. F. A. Genezini
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  4. L. T. Grinberg
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  5. R. E. L. Ferretti
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  6. J. M. Farfel
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  7. C. Suemoto
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  8. C. A. Pasqualucci
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  9. W. Jacob-Filho
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Correspondence to M. Saiki.

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Saiki, M., Leite, R.E.P., Genezini, F.A. et al. Trace element concentration differences in regions of human brain by INAA. J Radioanal Nucl Chem 296, 267–272 (2013). https://doi.org/10.1007/s10967-012-2055-9

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  • DOI: https://doi.org/10.1007/s10967-012-2055-9

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