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MicroRNA Detection in Prostate Tumors by Quantitative Real-time PCR qPCR
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MicroRNA Detection in Prostate Tumors by Quantitative Real-time PCR qPCR

Published on: May 16, 2012

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Down-regulation of Dicer and Ago2 is associated with cell proliferation and apoptosis in prostate cancer

Xiao-Jie Bian1, Gui-Ming Zhang, Cheng-Yuan Gu

  • 1Department of Urology, Fudan University Shanghai Cancer Center, No. 270, Dong'an Road, Shanghai, 200032, China.

Tumour Biology : the Journal of the International Society for Oncodevelopmental Biology and Medicine
|August 20, 2014
PubMed

Insights

Dicer and Argonaute2 (Ago2) are crucial for microRNA synthesis and RNA interference. Their elevated expression in prostate cancer (Pca) correlates with disease progression, suggesting they are potential therapeutic targets.

Area of Science:

  • Molecular Biology
  • Cancer Research
  • Biochemistry

Background:

  • Dicer and Argonaute2 (Ago2) are key enzymes in microRNA biogenesis and RNA interference pathways.
  • MicroRNAs play significant roles in regulating gene expression and are implicated in various cancers, including prostate cancer (Pca).

Purpose of the Study:

  • To investigate the expression levels and functional roles of Dicer and Ago2 in prostate cancer.
  • To evaluate the potential of Dicer and Ago2 as biomarkers for Pca progression and as therapeutic targets.

Main Methods:

  • Immunohistochemistry (IHC) was used to assess Dicer and Ago2 expression in Pca tissues and compare with pathological features.
  • RNA interference (RNAi) was employed to down-regulate Dicer and Ago2 in Pca cell lines (LNCaP, PC-3, DU145).
  • Cell proliferation, apoptosis, and cell cycle distribution were analyzed using CCK-8 assays and flow cytometry.

Main Results:

  • Dicer and Ago2 expression levels were significantly higher in Pca tissues compared to adjacent benign tissues.
  • Higher expression of Dicer and Ago2 correlated with lower Gleason patterns in Pca, indicating a role in disease progression.
  • Silencing Dicer or Ago2 inhibited proliferation, induced apoptosis, and caused cell cycle arrest (G2/M or S phase) in Pca cell lines.

Conclusions:

  • Dicer and Ago2 are critically involved in regulating proliferation, apoptosis, and cell cycle progression in prostate cancer.
  • These proteins represent promising biomarkers for monitoring Pca progression.
  • Dicer and Ago2 emerge as potential therapeutic targets for prostate cancer treatment.

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