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Expression of Rab3b in Human Glioma: Influence on Cell Proliferation and Apoptosis

Qili Luo1, Yueping Liu2, Zilin Yuan2

  • 1The First School of Clinical Medicine, Southern Medical University, Guangzhou City, Guangdong 510515, China.

Current Pharmaceutical Design
|September 17, 2020
PubMed
Abstract

Insights

Rab3b (Rab GTPase3b) silencing inhibits glioma cell proliferation and promotes apoptosis. Higher Rab3b expression correlates with glioma progression and grade, suggesting its diagnostic and prognostic value.

Area of Science:

  • Neuro-oncology
  • Molecular Biology
  • Cancer Research

Background:

  • Glioma, a common and highly malignant central nervous system tumor, is influenced by Rab GTPases.
  • Rab GTPases are implicated in various cellular processes relevant to cancer development.

Purpose of the Study:

  • To investigate the role of Rab3b (Rab GTPase3b) in human glioma cell proliferation and apoptosis.
  • To assess the diagnostic and prognostic value of Rab3b expression in human glioma.

Main Methods:

  • Rab3b was silenced using siRNA in human glioma cells (U251, U87).
  • Quantitative real-time PCR and Western blotting were used to measure gene and protein expression (Rab3b, P53, Caspase 7, Bax, Bim).
  • Cell proliferation, cell cycle, and apoptosis were analyzed using cell counting kit-8 assay and flow cytometry.

Main Results:

  • Rab3b silencing significantly downregulated Rab3b expression, inhibited cell proliferation, induced cell cycle arrest, and promoted apoptosis.
  • Rab3b expression was significantly higher in human glioma tissues compared to adjacent normal brain tissues.
  • Elevated Rab3b levels were observed in high-grade gliomas (WHO III-IV) compared to low-grade gliomas (WHO I-II).

Conclusions:

  • Rab3b expression levels are significantly associated with glioma progression.
  • Silencing Rab3b inhibits glioma cell proliferation and induces apoptosis, highlighting its potential as a therapeutic target.
  • Preliminary in vitro findings suggest Rab3b's value in glioma diagnosis and prognosis, warranting further in vivo validation.
Keywords:
Rab3bapoptosisdiagnosishuman gliomaprogressionproliferation

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