title: Associated occurrence of p75 neurotrophin receptor expressing aldynoglia and microglia/macrophages in long term organotypic murine brain slice cultures.
abstract: Growth-promoting aldynoglia, characterized by the expression of the prototype immature Schwann cell marker p75 neurotrophin receptor (NTR) have been shown to occur in some demyelinating diseases. However, the mechanisms determining the emergence and fate of such cells are largely unknown. This study aimed at the identification of such cells and potential triggering factors using an in vitro slice culture approach. Organotypic cerebrum and brain stem slices of adult mice were cultivated for up to 18 days in vitro. Immunohistochemistry for the detection of p75(NTR), CD107b, periaxin, growth associated protein (GAP)-43, and glial fibrillary acidic protein (GFAP) was performed. The results for p75(NTR) were substantiated by the use of in situ hybridization. Cultivation was associated with a progressively increasing spontaneous occurrence of bi- to multipolar p75(NTR)-positive, but periaxin-negative glia, indicative of aldynoglial Schwann cell like cells. Similar cells stained intensely positive for GAP-43, a marker for non-myelinating Schwann cells. The number of p75(NTR) positive glia did not correlate with GFAP expression, but showed a strong correlation with a remarkable spontaneous response of CD107b positive phagocytic microglia/macrophages. Moreover, aldynoglial p75(NTR) immunoreactivity negatively correlated to neuronal p75(NTR) expression, which was lost during culturing. The present results demonstrate that the cultivation of organotypic murine brain slices is accompanied by a spontaneous response of both microglia/macrophages and p75(NTR) positive cells, suggestive of Schwann cell like aldynoglia. The findings highlights the role of microglia/macrophages, which seem to be an important triggering factor, facilitating the occurrence of this unique type of macroglia.
authors.affiliation: Department of Pathology, University of Veterinary Medicine, Buenteweg 17, D-30559 Hannover, Germany; Center for Systems Neuroscience, Hannover, Germany. Electronic address: ingo.spitzbarth@tiho-hannover.de.
authors.forename: I
authors.initials: I
authors.lastname: Spitzbarth
authors.affiliation: Department of Pathology, University of Veterinary Medicine, Buenteweg 17, D-30559 Hannover, Germany; Center for Systems Neuroscience, Hannover, Germany.
authors.forename: A
authors.initials: A
authors.lastname: Cana
authors.affiliation: Department of Pathology, University of Veterinary Medicine, Buenteweg 17, D-30559 Hannover, Germany; Center for Systems Neuroscience, Hannover, Germany.
authors.forename: K
authors.initials: K
authors.lastname: Hahn
authors.affiliation: Department of Pathology, University of Veterinary Medicine, Buenteweg 17, D-30559 Hannover, Germany; Center for Systems Neuroscience, Hannover, Germany.
authors.forename: F
authors.initials: F
authors.lastname: Hansmann
authors.affiliation: Department of Pathology, University of Veterinary Medicine, Buenteweg 17, D-30559 Hannover, Germany; Center for Systems Neuroscience, Hannover, Germany.
authors.forename: W
authors.initials: W
authors.lastname: Baumgärtner
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D001933:Brain Stem / Q000166:cytology*; D005260:Female; D066298:In Vitro Techniques; D052119:Lysosomal-Associated Membrane Protein 2 / Q000378:metabolism; D008264:Macrophages / Q000378:metabolism*; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D009419:Nerve Tissue Proteins / Q000378:metabolism; D009457:Neuroglia / Q000378:metabolism*; D009474:Neurons / Q000378:metabolism*; D009924:Organ Culture Techniques; D020800:Receptor, Nerve Growth Factor / Q000378:metabolism*; D013997:Time Factors
chemical_list: D052119:Lysosomal-Associated Membrane Protein 2; D009419:Nerve Tissue Proteins; D020800:Receptor, Nerve Growth Factor
keywords: Adult; Aldynoglia; Central nervous system; Low affinity nerve growth factor receptor; Mouse; Organotypic slice culture; Schwann cell; p75 neurotrophin receptor