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Updated: Mar 15, 2026

Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells
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Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells

Published on: February 21, 2014

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Musashi RNA-binding protein 2 regulates estrogen receptor 1 function in breast cancer

M-H Kang1, K J Jeong2, W Y Kim3

  • 1Department of Convergence Medicine, Ulsan College of Medicine, Seoul, South Korea.

Oncogene
|September 6, 2016
PubMed

Insights

Musashi RNA-binding protein 2 (MSI2) directly regulates estrogen receptor 1 (ESR1) in breast cancer. This finding reveals a novel mechanism linking MSI2 to ER-positive breast cancer progression and patient outcomes.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • Musashi RNA-binding protein 2 (MSI2) plays a role in human cancers, but its specific regulatory mechanisms in breast cancer are unclear.
  • Estrogen receptor 1 (ESR1) is a key therapeutic target in breast cancer, and its expression correlates with clinical outcomes.

Purpose of the Study:

  • To elucidate the regulatory mechanisms of MSI2 in breast cancer pathophysiology.
  • To investigate the direct relationship between MSI2 and ESR1 in breast cancer.

Main Methods:

  • Gene expression data analysis to assess MSI2 and ESR1 correlation.
  • Functional studies to determine MSI2's impact on breast cancer cell growth and ESR1 function.
  • RNA-binding assays to identify MSI2 binding sites on ESR1 RNA.

Main Results:

  • MSI2 expression is enriched in estrogen receptor (ER)-positive breast cancer and correlates significantly with ESR1 expression and its downstream targets.
  • MSI2 levels are associated with clinical outcomes in breast cancer patients.
  • MSI2 directly binds to ESR1 RNA, enhancing ESR1 protein stability and influencing breast cancer cell growth.

Conclusions:

  • MSI2 acts as a novel upstream regulator of ESR1 in breast cancer.
  • The RNA-binding protein MSI2 has significant clinical relevance in breast cancer, particularly in ER-positive subtypes.

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