title: Ontogenesis and migration of metallothionein I/II-containing glial cells in the human telencephalon during the second trimester.
abstract: Metallothioneins (MT) belong to a widespread family of proteins characterized by a high metal content (mainly Cu(2+) and Zn(2+)) and by the presence of cysteine residues. The expression of metallothionein I-II (MT I/II), glial fibrillary acid protein (GFAP), and vimentin was examined in a series of 16 developing human brains of the second trimester. The brains of a stillborn/newborn individual and two postnatal individuals were studied for comparison. MT I/II-containing cells became consistently and clearly visible only from gestational week 21 onwards. On the other hand, several densely packed GFAP- and vimentin-containing elements were evident in the neuroepithelium at several periventricular locations and in the subventricular zone of all fetuses of the series. GFAP- and vimentin-containing elements also entered the intermediate plate, but only a few elements were evident in the outer layers of the maturing cortex. The relatively late onset of MT I/II expression and their distribution are discussed in relation to the uptake of trace elements during the last trimester of pregnancy, and the role of astrocytes in neuronal guidance and maturation of cortical circuits.
authors.affiliation: Department of Experimental Veterinary Science, University of Padova, Italy. bruno.cozzi@unipd.it <bruno.cozzi@unipd.it>
authors.forename: Bruno
authors.initials: B
authors.lastname: Cozzi
authors.forename: Marta
authors.initials: M
authors.lastname: Giacomello
authors.forename: Pamela
authors.initials: P
authors.lastname: Zambenedetti
authors.forename: Silvia
authors.initials: S
authors.lastname: Bolognin
authors.forename: Erich
authors.initials: E
authors.lastname: Rossipal
authors.forename: Antonella
authors.initials: A
authors.lastname: Peruffo
authors.forename: Paolo
authors.initials: P
authors.lastname: Zatta
mesh_terms: D048708:Cell Growth Processes / Q000502:physiology; D002465:Cell Movement / Q000502:physiology*; D005260:Female; D005333:Fetus; D018507:Gene Expression Regulation, Developmental / Q000502:physiology; D005904:Glial Fibrillary Acidic Protein / Q000378:metabolism; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008668:Metallothionein / Q000378:metabolism*; D009457:Neuroglia / Q000502:physiology*; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D013687:Telencephalon / Q000166:cytology / Q000196:embryology / Q000254:growth & development; D014746:Vimentin / Q000378:metabolism
chemical_list: D005904:Glial Fibrillary Acidic Protein; D014746:Vimentin; D008668:Metallothionein