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Functional Analysis of Histone Demethylase Jmjd2b on Lipopolysaccharide-Treated Murine Neural Stem Cells (NSCs)

Title
Functional Analysis of Histone Demethylase Jmjd2b on Lipopolysaccharide-Treated Murine Neural Stem Cells (NSCs)
Author
채영규
Keywords
NE-4C cells; Lipopolysaccharides; Jmjd2b; Neuroinflammation; GeneGo analysis
Issue Date
2013-02
Publisher
F P Graham Publishing Co.
Citation
Neurotoxicity research, Feb 2013, 23(2), P.154-165
Abstract
Neural stem cell (NSC) neurogenesis is the formation of new neurons by which the brain maintains its lifelong plasticity in response to extrinsic and intrinsic changes. Here, we show the effect of lipopolysaccharides (LPS) as an in vitro model of inflammation on NSCs to determine whether the inflammatory mediators can epigenetically affect NSCs and alter their proliferation and differentiation abilities. To study the effect of LPS on NSCs, we used an immortalized mouse neuroectodermal stem cell line, NE-4C. We found that Jmjd2b, histone-3 lysine-9 di-/tri-methyl (H3K9me2/3) demethylase, is functional following LPS treatment and is crucial in multiple signaling pathways and biological processes. The global gene expression levels were detected in Jmjd2b-knockdown (kd) NE-4C cells and in LPS-stimulated Jmjd2b-kd NE-4C cells using an Affymetrix GeneChip(A (R)) Mouse Gene 1.0 ST Array. In addition, the datasets were analyzed using MetaCore Pathway Analysis (GeneGo). The attenuation of Jmjd2b in NE-4C cells significantly affected the p65, iNOS, Bcl2, and TGF-beta expression levels and had downstream effects on related signaling pathways. In addition, chromatin immunoprecipitation revealed that Jmjd2b-kd could inhibit the Notch1, IL-1 beta, and IL-2 genes by recruiting repressive H3K9me3 to their promoters. Moreover, this study highlights Jmjd2b role in LPS-mediated inflammation, which suggests an epigenetic regulation in NE-4C cells. Finally, this study establishes novel Jmjd2b targets that potentiate a biological rationale involving Jmjd2b in NSC inflammation.
URI
https://link.springer.com/article/10.1007%2Fs12640-012-9346-3http://hdl.handle.net/20.500.11754/44420
ISSN
1029-8428
DOI
10.1007/s12640-012-9346-3
Appears in Collections:
GRADUATE SCHOOL[S](대학원) > BIONANOTECHNOLOGY(바이오나노학과) > Articles
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