Density of TMEM119‑positive microglial cells in postmortem cerebrospinal fluid as a surrogate marker for assessing complex neuropathological processes in the CNS

dc.contributor.authorBohnert, Simone
dc.contributor.authorTrella, Stefanie
dc.contributor.authorPreiß, Ulrich
dc.contributor.authorHeinsen, Helmut
dc.contributor.authorBohnert, Michael
dc.contributor.authorZwirner, Johann
dc.contributor.authorTremblay, Marie-Ève
dc.contributor.authorMonoranu, Camelia-Maria
dc.contributor.authorOndruschka, Benjamin
dc.date.accessioned2024-02-02T20:23:26Z
dc.date.available2024-02-02T20:23:26Z
dc.date.copyright2022en_US
dc.date.issued2022
dc.descriptionWe would like to thank the technical assistants Heiko Besenfelder and Max Perschneck, Institute of Forensic Medicine, University of Wuerzburg, for their excellent support in collecting the specimens, Michaela Hartmann, Department of Neuropathology, Institute of Pathology, University of Wuerzburg, as well as the team of the CSF laboratory of the Neurological University Hospital for their help with the preparations and stains. The authors would also like to thank Gerdi Zimmermann (Commissioned Sworn Translator, Gundelfingen, Germany) for correcting the English language of the manuscript. This paper is dedicated to Donata, the daughter of SB.en_US
dc.description.abstractRoutine coronal paraffin-sections through the dorsal frontal and parieto-occipital cortex of a total of sixty cases with divergent causes of death were immunohistochemically (IHC) stained with an antibody against TMEM119. Samples of cerebrospinal fluid (CSF) of the same cases were collected by suboccipital needle-puncture, subjected to centrifugation and processed as cytospin preparations stained with TMEM119. Both, cytospin preparations and sections were subjected to computer-assisted density measurements. The density of microglial TMEM119-positive cortical profiles correlated with that of cytospin results and with the density of TMEM119-positive microglial profiles in the medullary layer. There was no statistically significant correlation between the density of medullary TMEM119-positive profiles and the cytospin data. Cortical microglial cells were primarily encountered in supragranular layers I, II, and IIIa and in infragranular layers V and VI, the region of U-fibers and in circumscribed foci or spread in a diffuse manner and high density over the white matter. We have evidence that cortical microglia directly migrate into CSF without using the glympathic pathway. Microglia in the medullary layer shows a strong affinity to the adventitia of deep vessels in the myelin layer. Selected rapidly fatal cases including myocardial infarcts and drowning let us conclude that microglia in cortex and myelin layer can react rapidly and its reaction and migration is subject to pre-existing external and internal factors. Cytospin preparations proved to be a simple tool to analyze and assess complex changes in the CNS after rapid fatal damage. There is no statistically significant correlation between cytospin and postmortem interval. Therefore, the quantitative analyses of postmortem cytospins obviously reflect the neuropathology of the complete central nervous system. Cytospins provide forensic pathologists a rather simple and easy to perform method for the global assessment of CNS affliction.en_US
dc.description.reviewstatusRevieweden_US
dc.description.scholarlevelFacultyen_US
dc.description.sponsorshipOpen Access funding enabled and organized by Projekt DEAL.en_US
dc.identifier.citationBohnert, S., Trella, S., Preiß, U., Heinsen, H., Bohnert, M., Zwirner, J., ... Ondruschka, B. (2022). Density of TMEM119-positive microglial cells in postmortem cerebrospinal fluid as a surrogate marker for assessing complex neuropathological processes in the CNS. International Journal of Legal Medicine, 136, 1841-1850. https://doi.org/10.1007/s00414-022-02863-5en_US
dc.identifier.urihttps://doi.org/10.1007/s00414-022-02863-5
dc.identifier.urihttp://hdl.handle.net/1828/15923
dc.language.isoenen_US
dc.publisherInternational Journal of Legal Medicineen_US
dc.subjectcerebrospinal fluiden_US
dc.subjectforensic neuropathologyen_US
dc.subjectforensic neurotraumatologyen_US
dc.subjectimmunohistochemistryen_US
dc.subjectimmunocytochemistryen_US
dc.subjectbiomarkeren_US
dc.titleDensity of TMEM119‑positive microglial cells in postmortem cerebrospinal fluid as a surrogate marker for assessing complex neuropathological processes in the CNSen_US
dc.typeArticleen_US

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