Magnetic properties of human hippocampal tissue--evaluation of artefact and contamination sources

Brain Research Bulletin
Jon Dobson, P Grassi

Abstract

To investigate the possibility that postmortem chemical alteration or contamination is responsible for recent results indicating the presence of magnetite in human brain tissue and to determine whether magnetite is present in living brain tissue, we examined tissue samples resected from six patients during amygdalohippocampectomy operations. The tissue samples were sealed in sterilized vials in the operating theater and placed into liquid nitrogen directly after removal to prevent changes in tissue chemistry after the death of the brain cells. The low temperature magnetic properties of the tissue were measured to determine the presence of ferro- or ferrimagnetic material in the tissue. The results of these experiments indicate that magnetite is present in the tissue. In addition, results of experiments designed to control for airborne contamination and contamination during cauterization of vessels during surgery indicate that these are not significant sources of magnetite contamination in the tissue.

References

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Citations

Jan 8, 1999·Biochimica Et Biophysica Acta·P P Schultheiss-GrassiJ Dobson
Aug 10, 2002·Clinical Neurophysiology : Official Journal of the International Federation of Clinical Neurophysiology·Antonio SastrePaul Gailey
Jul 20, 2006·Journal of the Royal Society, Interface·A MikhaylovaJ Dobson
Oct 4, 2006·Journal of the Royal Society, Interface·Franziska BremJon Dobson
Oct 10, 2009·Medical Hypotheses·Marcos Arturo Martínez BanaclochaHelios Martínez Banaclocha
Mar 27, 2012·BioFactors·Rudy J CastellaniXiongwei Zhu
Apr 24, 2004·Annals of the New York Academy of Sciences·Jon Dobson
Mar 16, 2005·Bioelectromagnetics·Mike Fuller, Jon Dobson
Aug 22, 2015·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Martin KopániHedviga Mrazova
Aug 11, 2006·Journal of Inorganic Biochemistry·Lucía GutiérrezRocío Arranz
Dec 18, 2013·Cryobiology·Atsuko Kobayashi, Joseph L Kirschvink
May 8, 2018·Proceedings of the National Academy of Sciences of the United States of America·Atsuko KobayashiHarry N Golash
Jun 16, 2005·Biometals : an International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine·Franziska BremJon Dobson
Dec 29, 2014·F1000Research·Sheila Bouten, J Bruno Debruille
Jun 28, 2019·Frontiers in Medicine·Kari MurrosJohanna M Salminen
May 18, 2007·Neurochemical Research·Rudy J CastellaniXiongwei Zhu
Dec 13, 2016·Scientific Reports·Pravin KumarLucia Bossoni
Jul 29, 2018·Scientific Reports·Stuart A GilderChristoph Schmitz
Oct 16, 2008·Chemical Reviews·Damien Faivre, Dirk Schüler
Jun 11, 2021·Science Advances·James EverettNeil D Telling
Jun 26, 2021·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Jan Klohs, Ann M Hirt
Dec 22, 2020·Journal of Magnetism and Magnetic Materials·Kevin J WalshGunjan Agarwal
Aug 6, 2019·Environmental Science & Technology·Tomasz Gonet, Barbara A Maher

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