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Updated: Sep 24, 2025

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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The developmental stage of the medulloblastoma cell-of-origin restricts Sonic hedgehog pathway usage and drug

Marlinde J Smit1, Tosca E I Martini1, Inna Armandari1

  • 1European Research Institute for the Biology of Ageing/ERIBA, University Medical Center Groningen, University of Groningen, Hanzeplein 1, 9700 RB, Groningen, The Netherlands.

Journal of Cell Science
|May 10, 2022
PubMed

Insights

Sonic hedgehog medulloblastoma shows age-specific gene expression changes. Infant tumors have low primary cilia, suggesting targeted downstream therapies for this specific patient group.

Area of Science:

  • Neuro-oncology
  • Developmental Biology
  • Molecular Biology

Background:

  • Sonic hedgehog (SHH) medulloblastoma arises from cerebellar granule neuron progenitor (CGNP) cells.
  • Hedgehog signaling is crucial for perinatal CGNP expansion, but SHH tumors display pathway dysregulation and age-specific mutations.
  • The developmental stage of CGNPs may influence these age-specific tumor characteristics.

Purpose of the Study:

  • To investigate if the developmental stage of CGNPs explains age-specific aberrations in SHH medulloblastoma.
  • To analyze dynamic gene expression changes in developing murine CGNPs.
  • To compare murine CGNP transcriptomes with human SHH medulloblastoma to identify conserved patterns.

Main Methods:

  • Analysis of developing murine CGNP transcriptomes across different ages.
  • Cross-species comparison of murine CGNP gene expression with human SHH medulloblastoma data.
  • Assessment of SHH pathway component responsiveness (Smoothened, SUFU, GLI family proteins).

Main Results:

  • Highly dynamic gene expression was observed in murine CGNPs as a function of age.
  • Human SHH medulloblastomas partially maintained these age-specific expression patterns.
  • Infant medulloblastomas and early embryonic CGNPs showed low primary cilium expression, correlating with reduced Smoothened responsiveness but retained SUFU and GLI sensitivity.

Conclusions:

  • Developmental stage influences SHH medulloblastoma characteristics, explaining age-specific lesions.
  • Low primary cilium expression is a hallmark of infant SHH medulloblastoma and early CGNPs.
  • The retained sensitivity to downstream SHH components (SUFU, GLI) in infant tumors explains the prevalence of SUFU mutations and supports targeted downstream therapies for infants.
Keywords:
Cerebellar developmentCerebellar granule neuron progenitorsMedulloblastomaPrimary ciliaSonic hedgehog signalingTumor cell-of-origin

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