Metabolomics,Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

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Expression profiling of mouse T-ALL (Vav-tTA;TRE-GFP-shIkaros primary leukemia ALL101) cells following Ikaros restoration [RNA-Seq]


ABSTRACT: To examine Ikaros tumor suppressor mechanisms, we have utilized inducible RNAi to dynamically restore endogenous Ikaros expression in T-ALL driven by its knockdown. This causes rapid transcriptional repression of Notch1 and associated targets including Myc, even in leukemias harboring spontaneous activating Notch1 mutations (producing aberrant ICN1) similar to those found in 60% of human T-ALL. Ikaros restoration results in sustained regression of Notch1-wild type leukemias while endogenous or engineered ICN1 expression promotes rapid disease relapse, indicating that ICN1 functionally antagonizes Ikaros in T-ALL. RNA-seq was performed on T-ALL (Vav-tTA;TRE-GFP-shIkaros primary leukemia ALL101) cells isolated from three untreated and three 3-day Dox-treated mice. There were two sequencing runs of each RNA sample.

ORGANISM(S): Mus musculus

SUBMITTER: Gordon Smyth 

PROVIDER: E-GEOD-54447 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Activated Notch counteracts Ikaros tumor suppression in mouse and human T-cell acute lymphoblastic leukemia.

Witkowski M T MT   Cimmino L L   Hu Y Y   Trimarchi T T   Tagoh H H   McKenzie M D MD   Best S A SA   Tuohey L L   Willson T A TA   Nutt S L SL   Busslinger M M   Aifantis I I   Smyth G K GK   Dickins R A RA  

Leukemia 20150206 6


Activating NOTCH1 mutations occur in ~60% of human T-cell acute lymphoblastic leukemias (T-ALLs), and mutations disrupting the transcription factor IKZF1 (IKAROS) occur in ~5% of cases. To investigate the regulatory interplay between these driver genes, we have used a novel transgenic RNA interference mouse model to produce primary T-ALLs driven by reversible Ikaros knockdown. Restoring endogenous Ikaros expression in established T-ALL in vivo acutely represses Notch1 and its oncogenic target ge  ...[more]

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