Exosomal transfer of miR-151a enhances chemosensitivity to temozolomide in drug-resistant glioblastoma

Aug 14, 2018Cancer letters

Small RNA carried in cell particles may increase drug sensitivity in treatment-resistant brain cancer

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Abstract

Exosomal miR-151a levels may predict chemotherapy response in glioblastoma multiforme (GBM).

  • Chemoresistance reduces the effectiveness of Temozolomide (TMZ) in treating GBM.
  • Loss of miR-151a is linked to the acquisition of TMZ resistance in GBM cells.
  • Restoring miR-151a expression in TMZ-resistant cells enhances their sensitivity to TMZ by inhibiting DNA repair mechanisms.
  • Exosomes from TMZ-resistant cells can transfer chemoresistance to sensitive GBM cells, dependent on the loss of miR-151a.
  • CSF-derived exosomes reflect the chemoresistant status of GBMs by showing altered miR-151a expression levels.

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