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  4. Differentiation of V2a interneurons from human pluripotent stem cells

Differentiation of V2a interneurons from human pluripotent stem cells

PNAS, 2017 · DOI: 10.1073/pnas.1608254114 · Published: May 9, 2017

Spinal Cord InjuryRegenerative MedicineNeurology

Simple Explanation

This research focuses on creating a specific type of nerve cell, called V2a interneurons, from human stem cells. These V2a interneurons are important for controlling movement and breathing, and are often damaged in spinal cord injuries. The study found a way to grow these cells in the lab and showed that, when transplanted into mice with spinal cord injuries, the cells survived and began to integrate into the spinal cord.

Study Duration
60 Days
Participants
hPSC lines (H1 ESCs, WTC iPSCs, and WTB iPSCs) and C57/SCID mice
Evidence Level
Not specified

Key Findings

  • 1
    The study successfully differentiated human pluripotent stem cells (hPSCs) into CHX10+ V2a interneurons using a specific combination of signaling molecules.
  • 2
    hPSC-derived V2a cultures survived transplantation into the spinal cord of mice, coexpressed NeuN and VGlut2, extended neurites >5 mm, and formed putative synapses with host neurons.
  • 3
    Single-cell RNAseq analysis confirmed CHX10+ cells within the differentiated population, which consisted primarily of neurons with some glial and neural progenitor cells.

Research Summary

The study details a method for differentiating human pluripotent stem cells into V2a interneurons, which are crucial for motor control and are often damaged in spinal cord injuries. The differentiation process involves carefully manipulating signaling pathways with retinoic acid, sonic hedgehog, and Notch inhibition to optimize the yield of CHX10+ V2a interneurons. Transplanted hPSC-derived V2a interneurons not only survived in the murine spinal cord but also matured, extended neurites, and formed synapses with host neurons, suggesting their potential for SCI repair.

Practical Implications

Model CNS Development

The generated V2a interneurons can be used to model central nervous system development in vitro.

Potential Cell Therapy

These cells represent a potential cell therapy for spinal cord injury, offering a novel approach to restore functional connections.

Molecular Profiling

The robust source of human V2a interneurons allows for further molecular profiling of these cells, enhancing our understanding of their properties.

Study Limitations

  • 1
    Variability in the yield of CHX10+ cells between experiments and different cell lines.
  • 2
    The relatively immature phenotype of hPSC-derived cells, especially in vitro.
  • 3
    Need for functional assessment of electrical connectivity of human V2a interneurons with endogenous spinal neurons.

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