title: Heterogeneous immunoreactivity of glial cells in the mesencephalon of a lizard: a double labeling immunohistochemical study.
abstract: Astrocytes and radial glia coexist in the adult mesencephalon of the lizard Gallotia galloti. Radial glia and star-shaped astrocytes express glial fibrillary acidic protein (GFAP) and glutamine synthetase (GS). The same cell markers are also expressed by round or pear-shaped cells that are therefore astrocytes with unusual morphology. Other round or pear-shaped cells, also scattered in the tegmentum and the tectum, display only GS. Electron microscopy reveals that these cells may be oligodendrocytes. In this lizard, the GS is expressed in some oligodendrocytes while this does not occur in the central nervous system of mammals in situ. These results confirm that the cellular specificity of GS is different in various species and suggest that ependymal cells are also immunoreactive for GS but they do not contain GFAP.
authors.affiliation: Departamento de Morfología, Facultad de Ciencias de la Salud, Universidad de Las Palmas de G.C., Canary Islands, Spain.
authors.forename: M
authors.initials: M
authors.lastname: Monzón-Mayor
authors.forename: C
authors.initials: C
authors.lastname: Yanes
authors.forename: J
authors.initials: J
authors.lastname: De Barry
authors.forename: C
authors.initials: C
authors.lastname: Capdevilla-Carbonell
authors.forename: J
authors.initials: J
authors.lastname: Renau-Piqueras
authors.forename: G
authors.initials: G
authors.lastname: Tholey
authors.forename: G
authors.initials: G
authors.lastname: Gombos
mesh_terms: D000818:Animals; D005904:Glial Fibrillary Acidic Protein / Q000302:isolation & purification; D005974:Glutamate-Ammonia Ligase / Q000302:isolation & purification; D007150:Immunohistochemistry; D008116:Lizards / Q000033:anatomy & histology*; D008636:Mesencephalon / Q000166:cytology*; D009457:Neuroglia / Q000737:chemistry / Q000166:cytology* / Q000201:enzymology; D009836:Oligodendroglia / Q000737:chemistry / Q000166:cytology / Q000201:enzymology; D013045:Species Specificity
chemical_list: D005904:Glial Fibrillary Acidic Protein; D005974:Glutamate-Ammonia Ligase