Transcription factor protein expression patterns by neural or neuronal progenitor cells of adult monkey subventricular zone.
The anterior subventricular zone of the adult mammalian brain contains progenitor cells which are upregulated after cerebral ischemia. We have previously reported that while a part of the progenitors residing in adult monkey anterior subventricular zone travels to the olfactory bulb, many of these cells sustain location in the anterior subventricular zone for months after injury, exhibiting a phenotype of either neural or neuronal precursors. Here we show that ischemia increased the numbers of anterior subventricular zone progenitor cells expressing developmentally regulated transcription factors including Pax6 (paired-box 6), Emx2 (empty spiracles-homeobox 2), Sox 1-3 (sex determining region Y-box 1-3), Ngn1 (neurogenin 1), Dlx1,5 (distalless-homeobox 1,5), Olig1,3 (oligodendrocyte lineage gene 1,3) and Nkx2.2 (Nk-box 2.2), as compared with control brains. Analysis of transcription factor protein expression by sustained neural or neuronal precursors in anterior subventricular zone revealed that these two cell types were positive for characteristic sets of transcription factors. The proteins Pax6, Emx2, Sox2,3 and Olig1 were predominantly localized to dividing neural precursors while the factors Sox1, Ngn1, Dlx1,5, Olig2 and Nkx2.2 were mainly expressed by neuronal precursors. Further, differences between monkeys and non-primate mammals emerged, related to expression patterns of Pax6, Olig2 and Dlx2. Our results suggest that a complex network of developmental signals might be involved in the specification of primate progenitor cells.
Department of Restorative Neurosurgery, Division of Neuroscience, Kanazawa University Graduate School of Medical Science, Japan.
A B
AB
Tonchev
T
T
Yamashima
K
K
Sawamoto
H
H
Okano
D000704:Analysis of Variance; D000818:Animals; D051792:Basic Helix-Loop-Helix Proteins / Q000378:metabolism; D001973:Bromodeoxyuridine; D002454:Cell Differentiation / Q000502:physiology; D049109:Cell Proliferation; D002552:Cerebral Ventricles / Q000166:cytology*; D003952:Diagnostic Imaging / Q000379:methods; D005260:Female; D005786:Gene Expression Regulation / Q000502:physiology*; D000090322:Homeobox Protein Nkx-2.2; D018398:Homeodomain Proteins / Q000378:metabolism; D006801:Humans; D007511:Ischemia / Q000378:metabolism; D019394:Ki-67 Antigen / Q000378:metabolism; D008252:Macaca fascicularis; D008954:Models, Biological; D009419:Nerve Tissue Proteins / Q000378:metabolism; D009474:Neurons / Q000378:metabolism*; D009687:Nuclear Proteins; D016601:RNA-Binding Proteins / Q000378:metabolism; D013234:Stem Cells / Q000378:metabolism*; D013997:Time Factors; D014157:Transcription Factors / Q000378:metabolism*; D014404:Tubulin / Q000378:metabolism
D051792:Basic Helix-Loop-Helix Proteins; D001973:Bromodeoxyuridine; D000090322:Homeobox Protein Nkx-2.2; D018398:Homeodomain Proteins; D019394:Ki-67 Antigen; D009419:Nerve Tissue Proteins; D009687:Nuclear Proteins; D016601:RNA-Binding Proteins; D014157:Transcription Factors; D014404:Tubulin; C088334:Distal-less homeobox proteins; C491297:MSI1 protein, human; C105389:NEUROG1 protein, human; C000715631:NKX2-2 protein, human; C405707:OLIG1 protein, human