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Isolation, Enrichment, and Maintenance of Medulloblastoma Stem Cells
06:32

Isolation, Enrichment, and Maintenance of Medulloblastoma Stem Cells

Published on: September 1, 2010

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HDAC and MAPK/ERK Inhibitors Cooperate To Reduce Viability and Stemness in Medulloblastoma

Mariane da Cunha Jaeger1,2, Eduarda Chiesa Ghisleni1, Paula Schoproni Cardoso1

  • 1Cancer and Neurobiology Laboratory, Experimental Research Center, Clinical Hospital (CPE-HCPA), Federal University of Rio Grande do Sul, Porto Alegre, RS, Brazil.

Journal of Molecular Neuroscience : MN
|February 15, 2020
PubMed

Insights

Histone deacetylase (HDAC) inhibition shows antitumor effects in medulloblastoma (MB) by reducing stemness markers. Combining HDAC and MAPK/ERK inhibitors may offer a more effective treatment strategy for MB by targeting cancer stem cells.

Area of Science:

  • Oncology
  • Neuroscience
  • Molecular Biology

Background:

  • Medulloblastoma (MB) is the most common malignant pediatric brain tumor, with recurrence and metastasis causing mortality.
  • Cancer stem cells (CSCs) in MB may drive treatment resistance.
  • Histone deacetylase (HDAC) inhibition is an experimental strategy targeting stemness in cancer.

Purpose of the Study:

  • To investigate the effects of HDAC inhibition on medulloblastoma (MB) stemness and antitumor actions.
  • To explore the role of MAPK/ERK signaling in MB stemness and proliferation.
  • To evaluate the potential of combining HDAC and MAPK/ERK inhibitors for MB treatment.

Main Methods:

  • Analysis of stemness markers (BMI1, CD133) in MB patient samples.
  • Treatment of human MB cells with HDAC inhibitor (NaB) and assessment of cell viability, stemness markers, and acetylation.
  • Gene enrichment analysis to identify signaling pathways associated with stemness markers.
  • Inhibition of MAPK/ERK signaling and evaluation of its effects on stemness markers, neurosphere formation, and proliferation, alone and in combination with NaB.

Main Results:

  • Stemness markers BMI1 and CD133 are expressed across all MB molecular subgroups.
  • NaB reduced MB cell viability, BMI1/CD133 expression, and increased acetylation.
  • MAPK/ERK signaling was identified as a key pathway enriched in MB tumors.
  • MAPK/ERK inhibition decreased stemness markers and neurosphere formation, with enhanced antiproliferative effects when combined with NaB.

Conclusions:

  • HDAC inhibition demonstrates antitumor activity and modulates stemness in medulloblastoma.
  • Combined inhibition of HDAC and MAPK/ERK pathways may represent a novel, enhanced therapeutic strategy for MB by targeting the stemness phenotype.
Keywords:
Brain tumorExtracellular-regulated kinaseHistone deacetylaseMedulloblastomaStem cells

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