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Tumor suppressor miR-33b-5p regulates cellular function and acts a prognostic biomarker in RCC

Guocheng Huang1,2, Yulin Lai1,3, Xiang Pan1,4

  • 1Guangdong and Shenzhen Key Laboratory of Male Reproductive Medicine and Genetics, Peking University Shenzhen Hospital Shenzhen 518036, Guangdong, P. R. China.

American Journal of Translational Research
|August 11, 2020
PubMed
Abstract

Insights

MicroRNA miR-33b-5p is downregulated in renal cell carcinoma (RCC), inhibiting cancer progression. Low miR-33b-5p expression correlates with poor patient survival, suggesting its potential as a prognostic biomarker.

Area of Science:

  • Molecular Biology
  • Oncology
  • Biochemistry

Background:

  • Renal cell carcinoma (RCC) recurs in 30% of patients despite treatment.
  • MicroRNAs (miRNAs) are key regulators of cellular processes and implicated in cancer.
  • Understanding miRNA roles is crucial for improving RCC prognosis.

Purpose of the Study:

  • To investigate the expression of miR-33b-5p in RCC.
  • To determine the functional role of miR-33b-5p in RCC progression.
  • To evaluate miR-33b-5p as a prognostic biomarker for RCC.

Main Methods:

  • Quantitative real-time PCR (RT-qPCR) for miRNA expression analysis.
  • Cell proliferation, migration, and invasion assays (CCK-8, wound scratch, Transwell).
  • Analysis of The Cancer Genome Atlas (TCGA) data for prognostic correlation.

Main Results:

  • miR-33b-5p was significantly downregulated in RCC tissues and cell lines.
  • Overexpression of miR-33b-5p suppressed RCC cell proliferation, invasion, and migration.
  • Low miR-33b-5p expression correlated with poorer patient survival outcomes.
  • Predicted target genes include TBX15, SLC12A5, and PTGFRN.

Conclusions:

  • miR-33b-5p acts as a tumor suppressor in RCC.
  • miR-33b-5p demonstrates potential as a prognostic biomarker for RCC.
Keywords:
miR-33b-5pmicroRNAprognostic biomarkerrenal cell carcinoma

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