title: Immunochemistry of ethylnitrosourea-induced rat neurinomas, the RN6 neurinoma cell line and their transplantation tumors.
abstract: The expression of glial fibrillary acidic protein (GFAP), vimentin, S-100 protein (S-100), HNK-1, myelin basic protein (MBP) and fibronectin was investigated immunohistochemically in 51 ethylnitrosourea (ENU)-induced neurinomas of the rat. Additionally, 90 transplantation tumors derived from ENU-induced neurinomas and the RN6 rat neurinoma cell clone were studied. Vimentin immunoreactivity was shown in 50/51 primary neurinomas and 60/90 transplantation tumors. In contrast, GFAP was expressed in only 23/51 primary tumors and in 5/90 transplantation tumors. In the RN6 neurinoma clone, vimentin and GFAP could be demonstrated both in vivo and in vitro. GFAP expression varied depending on the tumor localization, i.e., tumors of distal portions of peripheral nerves were more frequently GFAP positive than tumors of the spinal roots or of cranial nerves. The same tendency was observed for S-100. In the series of transplantation tumors S-100 and GFAP immunoreactivity decreased with increasing numbers of transplantation passages. Only individual cells in 5 primary tumors were HNK-1 positive and no MBP-immunoreactive cells were observed. Our results demonstrate that the expression of differentiation antigens in ENU-induced experimental neurinomas parallels the results reported for human neurinomas.
authors.affiliation: Abteilung für Neuropathologie, Heinrich-Heine-Universität, Düsseldorf, Federal Republic of Germany.
authors.forename: K T
authors.initials: KT
authors.lastname: Vogeley
authors.forename: T
authors.initials: T
authors.lastname: Bilzer
authors.forename: G
authors.initials: G
authors.lastname: Reifenberger
authors.forename: W
authors.initials: W
authors.lastname: Wechsler
mesh_terms: D000818:Animals; D000943:Antigens, Differentiation / Q000032:analysis; D018959:CD57 Antigens; D002460:Cell Line; D005038:Ethylnitrosourea; D005260:Female; D005353:Fibronectins / Q000032:analysis; D005904:Glial Fibrillary Acidic Protein / Q000032:analysis; D007150:Immunohistochemistry; D051379:Mice; D008815:Mice, Inbred Strains; D004676:Myelin Basic Protein / Q000032:analysis; D009368:Neoplasm Transplantation; D009423:Nervous System Neoplasms / Q000139:chemically induced / Q000473:pathology*; D009442:Neurilemmoma / Q000139:chemically induced / Q000473:pathology*; D011247:Pregnancy; D051381:Rats; D011919:Rats, Inbred Strains; D009418:S100 Proteins / Q000032:analysis; D014746:Vimentin / Q000032:analysis
chemical_list: D000943:Antigens, Differentiation; D018959:CD57 Antigens; D005353:Fibronectins; D005904:Glial Fibrillary Acidic Protein; D004676:Myelin Basic Protein; D009418:S100 Proteins; D014746:Vimentin; D005038:Ethylnitrosourea