title: Expression of myelin genes in the developing chick retina.
abstract: In submammalian animals including chicks, the retina contains oligodendrocytes (OLs), and axons in the optic fiber layer are wrapped with compact myelin within the retina; however, the expression of myelin genes in the chick retina has not been demonstrated yet. In the present study, we examined the expression of three myelin genes (proteolipid protein, PLP; myelin basic protein, MBP; cyclic nucleotide phosphodiesterase, CNP) and PLP in the developing chick retina, in comparison to the localization of Mueller cells. In situ hybridization demonstrated that all three myelin genes began to be expressed at E14 in the chick embryo retina. They are mostly restricted to the ganglion cell layer and the optic fiber layer, with a few exceptions in the inner nuclear layer where Mueller cells reside; however, PLP mRNA+ cells do not express glutamine synthetase, or vice versa. The present results elucidate that myelin genes are expressed only by OLs that are mostly localized in the innermost layer of the developing chick retina.
authors.affiliation: Department of Biology, Kyoto Prefectural University of Medicine, Kyoto, Japan.
authors.forename: Hitosh
authors.initials: H
authors.lastname: Gotoh
authors.forename: Takayuki
authors.initials: T
authors.lastname: Ueda
authors.forename: Aoi
authors.initials: A
authors.lastname: Uno
authors.forename: Hideyo
authors.initials: H
authors.lastname: Ohuchi
authors.forename: Kazuhiro
authors.initials: K
authors.lastname: Ikenaka
authors.forename: Katsuhiko
authors.initials: K
authors.lastname: Ono
mesh_terms: D000818:Animals; D002642:Chick Embryo; D002645:Chickens; D018507:Gene Expression Regulation, Developmental / Q000502:physiology*; D009185:Myelin Proteins / Q000096:biosynthesis* / Q000235:genetics; D009186:Myelin Sheath / Q000235:genetics / Q000378:metabolism*; D009836:Oligodendroglia / Q000166:cytology / Q000378:metabolism*; D009898:Optic Disk / Q000166:cytology / Q000196:embryology*; D055351:Retinal Neurons / Q000378:metabolism*
chemical_list: D009185:Myelin Proteins