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Increased DNA Methylation of Dnmt3b-Targets Impairs Leukemogenesis

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Mus musculus

PROVIDER: GSE71041 | GEO | 2016/01/11

SECONDARY ACCESSION(S): PRJNA290163

REPOSITORIES: GEO

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Increased DNA Methylation of Dnmt3b-Targets Impairs Leukemogenesis

Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

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Increased DNA Methylation of Dnmt3b-Targets Impairs Leukemogenesis (RRBS)

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Increased DNA Methylation of Dnmt3b-Targets Impairs Leukemogenesis (RRBS)

Project description:The de novo DNA methyltransferases Dnmt3a and Dnmt3b are of crucial importance in hematopoietic stem cells, and Dnmt3b has recently been shown to play a role in genic methylation. Forced Dnmt3b expression induced widespread DNA hypermethylation in myc-bcl2 induced leukemias, especially at promoters and gene bodies of stem cell-related genes. MLL-AF9 induced leukemogenesis showed much less pronounced DNA hypermethylation upon Dnmt3b expression. Nonetheless, leukemogenesis was delayed in both models with a shared core set of DNA hypermethylated regions and suppression of stem cell-related genes. Our findings indicate a critical role for Dnmt3b-mediated DNA methylation in leukemia development and maintenance of LSC function. To investigate how Dnmt3b-mediated DNA methylation affects leukemogenesis, we analyzed leukemia development under conditions of high and physiological methylation levels in a tetracycline-inducible knockin mouse model. High expression of Dnmt3b slowed leukemia development in serial transplantations and impaired leukemia stem cell (LSC) function.

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Increased DNA Methylation of Dnmt3b-Targets Impairs Leukemogenesis (expression)

Project description:Here, we analyzed global gene expression changes that were associated with over expression of Dnmt3b in MLL-AF9 induced leukemias using the Affymetrix microarray platform. Changes in global gene expression were determined with Affymetrix microarrays in MLL-AF9 induced leukemias over expressing Dnmt3b.

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Developmental arsenic exposure impairs cognition, directly targets DNMT3A and reduces DNA methylation

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