title: Spatiotemporal patterns of expression of IGSF4 in developing mouse nervous system.
abstract: IGSF4 is a novel immunoglobulin (Ig)-like intercellular adhesion molecule. Since IGSF4 has been characterized by several independent research groups, this molecule is called by three names, TSLC1, SgIGSF and SynCAM. In the experiments to study global changes of gene expression in fetal murine brains after prenatal exposure to low-doses of X-rays, we have found IGSF4 as one of down-regulated genes after X-irradiation. In order to elucidate the expression of spatiotemporal expression of IGSF4 in the developing brain, we have produced polyclonal antibody against IGSF4 and studied the expression of IGSF4 with immunohistochemistry and Western blot analysis. At embryonic day (E) 12.5, IGSF4-immunoreactivity (IR) was observed diffusely in the telencephalic wall, whereas it became rather confined to the subplate, the cortical plate and the subventricular zone as the development proceeded. Noteworthy was a distinct radial pattern found in the cortical plate of E16.5. IGSF4-IR gradually decreased after birth and disappeared in adulthood. In the cerebellum, IGSF4 was expressed in the molecular layer at postnatal day (P) 0 through P14. By Western blot analysis, IGSF4 remained at low levels throughout embryonic stage, whereas it increased after birth. These spatiotemporal patterns of the expression suggest that IGSF4 plays crucial roles in the development of both telencephalon and cerebellum.
authors.affiliation: Department of Pathology and Applied Neurobiology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kawaramachi Hirokoji, Kamigyo-ku, Kyoto 602-8566, Japan.
authors.forename: Yoshimi
authors.initials: Y
authors.lastname: Ohta
authors.forename: Kyoko
authors.initials: K
authors.lastname: Itoh
authors.forename: Takeshi
authors.initials: T
authors.lastname: Yaoi
authors.forename: So
authors.initials: S
authors.lastname: Tando
authors.forename: Kenji
authors.initials: K
authors.lastname: Fukui
authors.forename: Shinji
authors.initials: S
authors.lastname: Fushiki
mesh_terms: D000818:Animals; D000831:Animals, Newborn; D000906:Antibodies / Q000378:metabolism; D000918:Antibody Specificity; D015153:Blotting, Western / Q000379:methods; D000075982:Cell Adhesion Molecule-1; D015815:Cell Adhesion Molecules; D002478:Cells, Cultured; D004622:Embryo, Mammalian; D005260:Female; D005727:Ganglia, Spinal / Q000166:cytology; D018507:Gene Expression Regulation, Developmental / Q000502:physiology*; D007136:Immunoglobulins / Q000235:genetics / Q000276:immunology / Q000378:metabolism*; D007150:Immunohistochemistry / Q000379:methods; D008565:Membrane Proteins / Q000235:genetics / Q000276:immunology / Q000378:metabolism*; D051379:Mice; D008813:Mice, Inbred ICR; D009420:Nervous System / Q000196:embryology* / Q000254:growth & development / Q000378:metabolism; D009474:Neurons / Q000378:metabolism; D011247:Pregnancy; D014404:Tubulin / Q000378:metabolism
chemical_list: D000906:Antibodies; C498598:Cadm1 protein, mouse; D000075982:Cell Adhesion Molecule-1; D015815:Cell Adhesion Molecules; D007136:Immunoglobulins; D008565:Membrane Proteins; D014404:Tubulin; C462941:beta3 tubulin, mouse