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An In Vitro Protocol for Evaluating MicroRNA Levels, Functions, and Associated Target Genes in Tumor Cells
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RETRACTED: MicroRNA-19a and microRNA-19b promote the malignancy of clear cell renal cell carcinoma through targeting

Shaoxi Niu1,2, Xin Ma1, Yu Zhang1

  • 1Department of Urology/State Key Laboratory of Kidney Diseases, Chinese PLA General Hospital/Chinese PLA Medical Academy, Beijing, People's Republic of China.

Plos One
|February 24, 2018
PubMed

Insights

Oncogenic miR-19a and miR-19b directly suppress the tumor suppressor RhoB in clear cell renal cell carcinoma (ccRCC). This leads to increased ccRCC cell proliferation and invasion, suggesting miR-19a/19b as potential therapeutic targets.

Area of Science:

  • Molecular Biology
  • Oncology
  • Biochemistry

Background:

  • Clear cell renal cell carcinoma (ccRCC) is an aggressive kidney cancer subtype lacking effective biomarkers.
  • RhoB functions as a tumor suppressor, inhibiting ccRCC progression.
  • Identifying regulatory mechanisms controlling RhoB is crucial for ccRCC treatment.

Purpose of the Study:

  • To investigate the role of microRNAs (miRNAs), specifically miR-19a and miR-19b, in regulating RhoB expression in ccRCC.
  • To determine the impact of miR-19a and miR-19b on ccRCC cell behavior.

Main Methods:

  • Reverse Transcription Polymerase Chain Reaction (RT-PCR) was used to analyze miR-19a and miR-19b expression levels.
  • Luciferase reporter assays were performed to confirm direct targeting of RhoB's 3' untranslated region (3'UTR) by miR-19a/19b.
  • Functional assays assessed the effects of RhoB knockdown or miR-19a/19b overexpression on ccRCC cell proliferation, migration, and invasion.

Main Results:

  • miR-19a and miR-19b were found to be upregulated in ccRCC tissues compared to adjacent non-tumor tissues.
  • Both miRNAs directly target and reduce RhoB expression by binding to its 3'UTR.
  • A negative correlation was observed between miR-19a/19b levels and RhoB expression in ccRCC.
  • Overexpression of miR-19a/19b or knockdown of RhoB promoted ccRCC cell proliferation, migration, and invasion.

Conclusions:

  • miR-19a and miR-19b play a significant role in repressing RhoB expression in ccRCC.
  • The downregulation of RhoB by these miRNAs contributes to ccRCC tumorigenesis and aggressiveness.
  • miR-19a and miR-19b represent potential molecular targets for novel ccRCC therapies.

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