Engineering Genetic Predisposition in Human Neuroepithelial Stem Cells Recapitulates Medulloblastoma Tumorigenesis

Cell Stem Cell. 2019 Sep 5;25(3):433-446.e7. doi: 10.1016/j.stem.2019.05.013. Epub 2019 Jun 13.

Abstract

Human neural stem cell cultures provide progenitor cells that are potential cells of origin for brain cancers. However, the extent to which genetic predisposition to tumor formation can be faithfully captured in stem cell lines is uncertain. Here, we evaluated neuroepithelial stem (NES) cells, representative of cerebellar progenitors. We transduced NES cells with MYCN, observing medulloblastoma upon orthotopic implantation in mice. Significantly, transcriptomes and patterns of DNA methylation from xenograft tumors were globally more representative of human medulloblastoma compared to a MYCN-driven genetically engineered mouse model. Orthotopic transplantation of NES cells generated from Gorlin syndrome patients, who are predisposed to medulloblastoma due to germline-mutated PTCH1, also generated medulloblastoma. We engineered candidate cooperating mutations in Gorlin NES cells, with mutation of DDX3X or loss of GSE1 both accelerating tumorigenesis. These findings demonstrate that human NES cells provide a potent experimental resource for dissecting genetic causation in medulloblastoma.

Keywords: SHH; human pluripotent stem cells; medulloblastoma; neuroepithelial stem cells.

Publication types

  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Basal Cell Nevus Syndrome / genetics*
  • Basal Cell Nevus Syndrome / metabolism
  • Basal Cell Nevus Syndrome / pathology
  • Brain Neoplasms / genetics*
  • Brain Neoplasms / metabolism
  • Brain Neoplasms / pathology
  • Carcinogenesis / genetics
  • DEAD-box RNA Helicases / genetics
  • Disease Models, Animal
  • Genetic Engineering
  • Genetic Predisposition to Disease
  • Humans
  • Medulloblastoma / genetics*
  • Medulloblastoma / metabolism
  • Medulloblastoma / pathology
  • Mice
  • Mice, SCID
  • N-Myc Proto-Oncogene Protein / genetics
  • N-Myc Proto-Oncogene Protein / metabolism*
  • Neoplasm Proteins / genetics
  • Neural Stem Cells / physiology*
  • Neuroepithelial Cells / physiology*
  • Patched-1 Receptor / genetics
  • Pluripotent Stem Cells / physiology*
  • Stem Cell Transplantation
  • Transplantation, Heterologous

Substances

  • GSE1 protein, human
  • MYCN protein, human
  • N-Myc Proto-Oncogene Protein
  • Neoplasm Proteins
  • PTCH1 protein, human
  • Patched-1 Receptor
  • DDX3X protein, human
  • DEAD-box RNA Helicases