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Temporal expression changes during differentiation of neural stem cells derived from mouse embryonic stem cell

✍ Scribed by Joon-Ik Ahn; Ki-Hwan Lee; Dong-Mi Shin; Jae-Won Shim; Chang-mee Kim; Hyun Kim; Sang-Hun Lee; Dr. Yong-Sung Lee

Publisher
John Wiley and Sons
Year
2004
Tongue
English
Weight
447 KB
Volume
93
Category
Article
ISSN
0730-2312

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✦ Synopsis

Abstract

Temporal analysis in gene expression during differentiation of neural stem cells (NSCs) was performed by using in‐house microarrays composed of 10,368 genes. The changes in mRNA level were measured during differentiation day 1, 2, 3, 6, 12, and 15. Out of 10,368 genes analyzed, 259 genes were up‐regulated or down‐regulated by 2‐fold or more at least at one time‐point during differentiation, and were classified into six clusters based on their expression patterns by K‐means clustering. Clusters characterized by gradual increase have large numbers of genes involved in transport and cell adhesion; those which showed gradual decrease have much of genes in nucleic acid metabolism, cell cycle, transcription factor, and RNA processing. In situ hybridization (ISH) validated microarray data and it also showed that Fox M1, cyclin D2, and CDK4 were highly expressed in CNS germinal zones and ectonucleotide pyrophosphatase/phosphodiesterase 2 (Enpp2) was highly expressed in choroid plexus where stem/progenitor cells are possibly located. Together, this clustering analysis of expression patterns of functionally classified genes may give insight into understanding of CNS development and mechanisms of NSCs proliferation and differentiation. © 2004 Wiley‐Liss, Inc.

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