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Imp2 regulates GBM progression by activating IGF2/PI3K/Akt pathway

Qingchun Mu1, Lijun Wang, Fengbo Yu

  • 1a Department of Neurosurgery; The First Hospital of Jilin University ; Changchun , Jilin , China.

Cancer Biology & Therapy
|February 27, 2015
PubMed

Insights

Insulin-like growth factor 2 mRNA-binding protein 2 (Imp2) promotes glioblastoma multiforme (GBM) growth and malignancy by regulating IGF2 and PI3K/Akt signaling. Inhibiting Imp2 may improve glioblastoma treatment outcomes.

Area of Science:

  • Neuro-oncology
  • Cancer Biology
  • Molecular Signaling

Background:

  • Glioblastoma multiforme (GBM) is an aggressive brain cancer with limited survival rates.
  • Current treatments include surgery, radiation, and chemotherapy, but improved therapies are needed.
  • Insulin-like growth factor 2 mRNA-binding protein 2 (Imp2) is implicated in various cancers, but its role in GBM is unclear.

Purpose of the Study:

  • To investigate the role of Imp2 in the development and progression of glioblastoma multiforme.
  • To elucidate the molecular mechanisms by which Imp2 influences GBM malignancy.
  • To assess the therapeutic potential of targeting Imp2 in GBM.

Main Methods:

  • Analysis of Imp2 expression in clinical GBM samples and public databases.
  • In vitro studies involving gain and loss of Imp2 expression in GBM cell lines.
  • Investigation of Imp2's regulation of Insulin-like growth factor 2 (IGF2) and PI3K/Akt signaling pathways.
  • Assessment of Imp2 inhibition's effect on GBM cell proliferation, migration, invasion, EMT, and sensitivity to temozolomide.

Main Results:

  • Imp2 is significantly upregulated in GBM tissues.
  • Modulating Imp2 expression affects GBM cell proliferation, migration, invasion, and epithelial-to-mesenchymal transition (EMT).
  • Imp2 regulates IGF2 activity, leading to activation of the PI3K/Akt signaling pathway and promoting GBM malignancy.
  • Inhibition of Imp2 enhances GBM cell sensitivity to temozolomide.

Conclusions:

  • Imp2 plays a critical role in promoting GBM malignancy through the IGF2/PI3K/Akt pathway.
  • Targeting Imp2 represents a potential therapeutic strategy for glioblastoma.
  • These findings contribute to understanding GBM biology and may aid in developing more effective treatments.
Keywords:
AktE-cadherinEMTEMT, epithelial-mesenchymal transitionGBMGBM, glioblastomas multiformeGBM-P, semi-established GBM primary cellsGBM-RE, semi-established recurrent TMZ-resistant GBM primary cellsIGF2IGF2, insulin-like growth factor 2Imp2Imp2, insulin-like growth factor 2 mRNA-binding protein 2KD, knockdownN-cadherinOE, overexpressingPI3KPI3K, phosphatidyl inositol 3-kinaseTMZ, temozolomideTemozolomideVimentin

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