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UCP2 silencing in glioblastoma reduces cell proliferation and invasiveness by inhibiting p38 MAPK pathway

Shuai Wu1, Chen Luo1, N U Farrukh Hameed1

  • 1Glioma Surgery Division, Department of Neurosurgery, Huashan Hospital, Fudan University, Shanghai, 200040, China.

Experimental Cell Research
|May 30, 2020
PubMed

Insights

Uncoupling protein-2 (UCP2) is upregulated in glioma, particularly glioblastoma, and drives tumor growth. Silencing UCP2 inhibits glioma cell functions and tumorigenicity, suggesting UCP2 as a therapeutic target.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Uncoupling protein-2 (UCP2) is a mitochondrial protein implicated in regulating reactive oxygen species (ROS).
  • UCP2 overexpression is observed in various cancers, but its specific role in glioblastoma (GBM) is not well understood.

Purpose of the Study:

  • To investigate the expression and function of UCP2 in glioma, particularly GBM.
  • To elucidate the underlying molecular mechanisms of UCP2's role in glioma progression.

Main Methods:

  • Analysis of UCP2 expression in glioma tissues and public databases.
  • Construction of UCP2-silenced glioma cell lines (U251, U87MG, A172) using lentivirus.
  • In vitro assays for cell migration, invasion, clonogenicity, proliferation, and apoptosis.
  • In vivo tumorigenicity studies in nude mice.
  • RNA-sequencing (RNA-Seq) for transcriptome and pathway analysis.
  • Validation using qRT-PCR and Western blot.

Main Results:

  • UCP2 expression is upregulated in glioma, especially GBM, correlating with poor patient prognosis.
  • UCP2 silencing inhibited glioma cell migration, invasion, clonogenicity, and proliferation, while promoting apoptosis in vitro.
  • Silenced UCP2 reduced tumor formation in vivo.
  • Transcriptome analysis revealed UCP2-dependent regulation of p38 MAPK signaling pathways.

Conclusions:

  • UCP2 plays a significant role in promoting glioma progression and tumorigenicity.
  • UCP2 acts through the p38 MAPK signaling pathway.
  • UCP2 represents a potential diagnostic marker and therapeutic target for glioma.
Keywords:
ApoptosisGBMInvasivenessProliferationUCP2p38

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