Crestospheres: Long-Term Maintenance of Multipotent, Premigratory Neural Crest Stem Cells

Area of Science:

• Developmental Biology
• Stem Cell Biology
• Neuroscience

Background:

• Premigratory neural crest cells are crucial embryonic cells with diverse differentiation potential.
• Maintaining these cells in a multipotent, undifferentiated state ex vivo has been a significant challenge.

Purpose of the Study:

• To establish in vitro conditions for maintaining premigratory neural crest cells in a self-renewing, multipotent state.
• To investigate the differentiation capacity of these maintained cells in vitro and in vivo.

Main Methods:

• Culture of neuroepithelial "crestospheres" derived from premigratory neural crest cells.
• Directed differentiation protocols for crestospheres.
• In vitro and in vivo (chick embryo transplantation) assays to assess multipotency and differentiation.

Main Results:

• Successfully maintained neuroepithelial crestospheres in a self-renewing, multipotent state for weeks.
• Demonstrated differentiation of crestospheres into multiple derivatives in vitro and in vivo.
• Showed similar maintenance and differentiation potential using human embryonic stem cells directed to a neural crest fate.

Conclusions:

• Developed novel conditions for long-term self-renewal of premigratory neural crest precursors in vitro.
• This approach facilitates the study of neural crest developmental mechanisms and neurocristopathies.
• Enables future research into the developmental potential and differentiation of neural crest cells.