MicroRNA-101 reverses temozolomide resistance by inhibition of GSK3β in glioblastoma

Oct 30, 2016Oncotarget

MicroRNA-101 may reverse chemotherapy resistance by blocking a key enzyme in brain cancer

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Abstract

MicroRNA-101 (miR-101) was significantly downregulated in TMZ-resistant glioblastoma multiforme (GBM) cells and human specimens.

  • Over-expression of miR-101 may sensitize resistant GBM cells to temozolomide (TMZ).
  • Downregulation of glycogen synthase kinase 3β (GSK3β) is associated with the sensitization of GBM cells to TMZ.
  • GSK3β inhibition could enhance the effectiveness of TMZ through repression of the MGMT gene via promoter methylation.
  • Decreased expression of miR-101 is related to poor prognosis in GBM patients, indicating its potential as a prognostic marker.
  • This suggests that targeting miR-101 could offer a novel strategy for overcoming TMZ resistance in GBM.

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