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Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer
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Systems Biology of Metabolic Regulation by Estrogen Receptor Signaling in Breast Cancer

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Identifying estrogen receptor target genes

Willem-Jan Welboren1, Henk G Stunnenberg, Fred C G J Sweep

  • 1Department of Molecular Biology, NCMLS Radboud University Nijmegen, Nijmegen, The Netherlands.

Molecular Oncology
|April 23, 2009
PubMed

Insights

Identifying estrogen receptor (ER) genomic targets is crucial for breast cancer treatment. Chromatin immunoprecipitation coupled with genome-wide tiling arrays provides an unbiased method for identifying direct ER target sequences genome-wide.

Area of Science:

  • Molecular Biology
  • Genomics
  • Endocrinology

Background:

  • The estrogen receptor (ER) is a key transcription factor regulating genes vital in breast cancer.
  • ER activity influences patient response to endocrine therapies like tamoxifen.
  • Accurate identification of ER genomic targets is essential but challenging.

Purpose of the Study:

  • To present a robust method for identifying direct estrogen receptor (ER) genomic targets.
  • To overcome limitations of expression-based and in silico approaches for ER target discovery.

Main Methods:

  • Utilized Chromatin Immunoprecipitation (ChIP) to isolate ER-bound DNA fragments.
  • Employed genome-wide tiling arrays to map ER binding sites across the entire genome.
  • Combined ChIP with tiling arrays for unbiased, genome-wide identification of direct ER target sequences.

Main Results:

  • Successfully identified direct genomic target sites of the estrogen receptor (ER).
  • This ChIP-tiling array approach offers a comprehensive and unbiased view of ER binding.

Conclusions:

  • Chromatin immunoprecipitation coupled with genome-wide tiling arrays is an effective strategy for unbiased, genome-wide identification of direct ER target sequences.
  • This method advances our understanding of ER function in gene regulation and breast cancer.

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