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DDX3X Suppresses the Susceptibility of Hindbrain Lineages to Medulloblastoma.

Deanna M Patmore | Amir Jassim | Erica Nathan | Reuben J Gilbertson | Daniel Tahan | Nadin Hoffmann | Yiai Tong | Kyle S Smith | Thirumala-Devi Kanneganti | Hiromichi Suzuki | Michael D Taylor | Paul Northcott | Richard J Gilbertson
Developmental cell | 2020

DEAD-Box Helicase 3 X-Linked (DDX3X) is frequently mutated in the Wingless (WNT) and Sonic hedghog (SHH) subtypes of medulloblastoma-the commonest malignant childhood brain tumor, but whether DDX3X functions as a medulloblastoma oncogene or tumor suppressor gene is not known. Here, we show that Ddx3x regulates hindbrain patterning and development by controlling Hox gene expression and cell stress signaling. In mice predisposed to Wnt- or Shh medulloblastoma, Ddx3x sensed oncogenic stress and suppressed tumor formation. WNT and SHH medulloblastomas normally arise only in the lower and upper rhombic lips, respectively. Deletion of Ddx3x removed this lineage restriction, enabling both medulloblastoma subtypes to arise in either germinal zone. Thus, DDX3X is a medulloblastoma tumor suppressor that regulates hindbrain development and restricts the competence of cell lineages to form medulloblastoma subtypes.

Pubmed ID: 32553121

Additional research tools detected in this publication

Antibodies used in this publication

Associated grants

  • Agency: NCI NIH HHS, United States
    Id: P01 CA096832
  • Agency: NCI NIH HHS, United States
    Id: P30 CA021765
  • Agency: NCI NIH HHS, United States
    Id: R01 CA129541
  • Agency: Cancer Research UK, United Kingdom

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CGHcall (tool)

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DNAcopy (tool)

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