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Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells
16:24

Profiling of Estrogen-regulated MicroRNAs in Breast Cancer Cells

Published on: February 21, 2014

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Identification of androgen-responsive microRNAs and androgen-related genes in breast cancer

Kiichiroh Nakano1, Yasuhiro Miki, Shuko Hata

  • 12-1 Seiryo-machi, Aoba-ku, Sendai, Miyagi, 980-8575 Japan. hsasano@patholo2.med.tohoku.ac.jp.

Anticancer Research
|November 14, 2013
PubMed
Abstract

Insights

Dihydrotestosterone induces miR-363 in breast cancer cells, impacting androgen receptor (AR) action. High IQ motif and WD repeats-1 (IQWD1) levels correlate with poor outcomes, suggesting a role in AR-driven tumor growth.

Area of Science:

  • Endocrinology
  • Molecular Biology
  • Oncology

Background:

  • Androgen receptors (ARs) are present in breast cancer cells, but their mechanism of action is not fully understood.
  • MicroRNA research offers new insights into hormone-dependent cancers.

Purpose of the Study:

  • Identify microRNAs induced by dihydrotestosterone in AR-positive breast cancer cells.
  • Investigate the correlation between microRNAs, target genes, and ARs in breast cancer tissues.

Main Methods:

  • Utilized an AR-positive cell line to identify dihydrotestosterone-induced microRNAs.
  • Employed immunohistochemistry and laser capture microscopy to analyze microRNA-mRNA-AR relationships in patient tissues.

Main Results:

  • miR-363 and its target IQ motif and WD repeats-1 (IQWD1) are implicated in an androgen action pathway.
  • Elevated IQWD1 levels in breast tumors are significantly associated with adverse clinical outcomes.

Conclusions:

  • The findings suggest miR-363 and IQWD1 play a role in androgen-mediated breast cancer growth.
  • IQWD1 recruitment to ARs may be essential for androgen-stimulated growth in AR-positive breast cancer.
Keywords:
Breast cancerIQWD1androgenmicroRNA

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