Aberrant Development Corrected in Adult-Onset Huntington's Disease iPSC-Derived Neuronal Cultures via WNT Signaling Modulation

Stem Cell Reports. 2020 Mar 10;14(3):406-419. doi: 10.1016/j.stemcr.2020.01.015. Epub 2020 Feb 27.

Abstract

Aberrant neuronal development and the persistence of mitotic cellular populations have been implicated in a multitude of neurological disorders, including Huntington's disease (HD). However, the mechanism underlying this potential pathology remains unclear. We used a modified protocol to differentiate induced pluripotent stem cells (iPSCs) from HD patients and unaffected controls into neuronal cultures enriched for medium spiny neurons, the cell type most affected in HD. We performed single-cell and bulk transcriptomic and epigenomic analyses and demonstrated that a persistent cyclin D1+ neural stem cell (NSC) population is observed selectively in adult-onset HD iPSCs during differentiation. Treatment with a WNT inhibitor abrogates this NSC population while preserving neurons. Taken together, our findings identify a mechanism that may promote aberrant neurodevelopment and adult neurogenesis in adult-onset HD striatal neurons with the potential for therapeutic compensation.

Keywords: Huntington's disease; WNT signaling; adult-onset HD; cell cycle; development; induced pluripotent stem cells; medium spiny neurons; neural stem cells; single-cell RNA-seq.

Publication types

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

MeSH terms

  • Adult
  • Age of Onset
  • Cell Cycle / genetics
  • Cell Differentiation / genetics
  • Cells, Cultured
  • Epigenesis, Genetic
  • Humans
  • Huntington Disease / genetics
  • Huntington Disease / pathology*
  • Induced Pluripotent Stem Cells / pathology*
  • Mitosis
  • Neostriatum / pathology
  • Neural Stem Cells / metabolism
  • Neurons / pathology*
  • Transcription Factors / metabolism
  • Transcriptome / genetics
  • Up-Regulation / genetics
  • Wnt Signaling Pathway*

Substances

  • Transcription Factors