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Related Concept Videos

DNA Microarrays02:34

DNA Microarrays

Microarrays are high-throughput and relatively inexpensive assays that can be automated to analyze large quantities of data at a time. They are used in genome-wide studies to compare gene or protein expression under two varied conditions, such as healthy and diseased states. Microarrays consist of glass or silica slides on which probe molecules are covalently attached through surface functionalization. Most commonly, the slides are prepared through the chemisorption of silanes to silica...

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Characterization of Functionally Associated miRNAs in Glioblastoma and their Engineering into Artificial Clusters for Gene Therapy
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The SOX2 response program in glioblastoma multiforme: an integrated ChIP-seq, expression microarray, and microRNA

Xuefeng Fang1, Jae-Geun Yoon, Lisha Li

  • 1Swedish Neuroscience Institute, Swedish Medical Center, Seattle, WA 98122, USA.

BMC Genomics
|January 8, 2011
PubMed
Summary

SOX2 gene knockdown reduces glioblastoma cell growth. Integrated genomic analysis reveals SOX2 regulates key cancer-related genes and microRNAs, including a feedback loop with miR-145.

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Area of Science:

  • Genomics
  • Cancer Biology
  • Stem Cell Biology

Background:

  • SOX2 is crucial for stemness in embryonic and adult stem cells.
  • SOX2 is reactivated in glioblastoma multiforme (GBM), but its precise role is undefined.

Purpose of the Study:

  • To define the SOX2 response program in GBM.
  • To investigate SOX2's regulatory network in GBM cells.

Main Methods:

  • ChIP-seq to identify SOX2 binding sites.
  • Microarray profiling to assess gene expression changes.
  • MicroRNA sequencing to identify regulated miRNAs.
  • SOX2 gene knockdown in LN229 GBM cells.

Main Results:

  • SOX2 knockdown decreased GBM cell proliferation and colony formation.
  • Identified 4883 SOX2 binding regions and 489 differentially expressed genes.
  • Discovered SOX2 regulates SOX1, SOX18, BEX1, BEX2, and 95 mature miRNAs.
  • Revealed a double negative feedback loop between SOX2 and miR-145.

Conclusions:

  • An integrated dataset of SOX2's genomic targets and regulatory network in GBM was generated.
  • This study enhances understanding of SOX2's role in glioblastoma carcinogenesis.
  • The findings provide a valuable resource for GBM research.