title: Molecular genetic and immunophenotypical analysis of Pax6 transcription factor and neural differentiation markers in human fetal neocortex and retina in vivo and in vitro.
abstract: Neurotransplantation of various cells, including heterotransplantation of fetal cerebral stem/progenitor cells into the eye is used in experimental studies of central nervous tissue repair during neurodegeneration. For evaluation of this approach, human fetal (weeks 9-20) stem/progenitor cells of the neocortex and retina were studied in vivo and in vitro by quantitative PCR and immunohistochemical staining. Native tissues and cultures were characterized by expression of Pax6 transcription factor (critical for the development of the retina and neocortex) and differentiation markers (nestin, betaIII-tubulin, glial fibrillary acidic protein, recoverin, NeuN, neurofilaments, Ki-67). The expression of Pax6 gene in the retina during active neurogenesis was stable and much higher than in the neocortex. In primary cultures, the pattern of Pax6 gene expression is retained and repeats that in native tissues. Immunohistochemical analysis revealed similarity of nestin and betaIII-tubulin expression in the neocortex and retina during the early (9-10 weeks) and later (20 weeks) periods and differences in cell phenotypes and their distribution. Culture studies showed that neocortical and retinal stem/progenitor cells are determined and exhibit specific differentiation characteristic of the corresponding native tissues. It can be hypothesized that heterotransplantation of the cerebral progenitor cells into the retina of experimental animals can lead to realization of their neurotrophic effect, but not to their functional integration.
authors.affiliation: N. K. Koltsov Institute of Developmental Biology, the Russian Academy of Sciences, Moscow, Russia.
authors.forename: B I
authors.initials: BI
authors.lastname: Verdiev
authors.forename: R A
authors.initials: RA
authors.lastname: Poltavtseva
authors.forename: O V
authors.initials: OV
authors.lastname: Podgornyi
authors.forename: M V
authors.initials: MV
authors.lastname: Marei
authors.forename: R D
authors.initials: RD
authors.lastname: Zinovyeva
authors.forename: G T
authors.initials: GT
authors.lastname: Sukhikh
authors.forename: M A
authors.initials: MA
authors.lastname: Aleksandrova
mesh_terms: D000943:Antigens, Differentiation / Q000378:metabolism*; D002454:Cell Differentiation / Q000502:physiology*; D005136:Eye Proteins / Q000235:genetics / Q000378:metabolism*; D005260:Female; D005333:Fetus / Q000033:anatomy & histology / Q000502:physiology; D005865:Gestational Age; D018398:Homeodomain Proteins / Q000235:genetics / Q000378:metabolism*; D006801:Humans; D016130:Immunophenotyping; D019579:Neocortex / Q000166:cytology / Q000502:physiology*; D009474:Neurons / Q000166:cytology / Q000378:metabolism / Q000637:transplantation; D000071841:PAX6 Transcription Factor; D051761:Paired Box Transcription Factors / Q000235:genetics / Q000378:metabolism*; D011247:Pregnancy; D012097:Repressor Proteins / Q000235:genetics / Q000378:metabolism*; D012160:Retina / Q000166:cytology / Q000502:physiology*
chemical_list: D000943:Antigens, Differentiation; D005136:Eye Proteins; D018398:Homeodomain Proteins; D000071841:PAX6 Transcription Factor; C000605730:PAX6 protein, human; D051761:Paired Box Transcription Factors; D012097:Repressor Proteins