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Self-organizing neuruloids model developmental aspects of Huntington's disease in the ectodermal compartment
Tomomi Haremaki1, Jakob J Metzger1,2, Tiago Rito1
1Laboratory of Stem Cell Biology and Molecular Embryology, The Rockefeller University, New York, NY, USA.
Nature Biotechnology
|September 11, 2019
Summary
Researchers developed standardized human embryonic stem cell models called neuruloids to study early human development and diseases. These neuruloids successfully mimic neurulation, offering insights into neural crest and placode formation and disease modeling.
Area of Science:
- Developmental Biology
- Stem Cell Biology
- Neuroscience
Background:
- Standardized models are needed to study human embryonic development and diseases.
- Human embryonic stem cells (hESCs) offer potential but require controlled differentiation methods.
Purpose of the Study:
- To develop a standardized micropattern technology to recapitulate early human neurulation.
- To investigate the self-organization mechanisms and cell fate specification within these models.
- To establish a platform for studying developmental aspects of human diseases, such as Huntington's disease.
Main Methods:
- Micropattern technology for self-organization of hESCs into neuruloids.
- Dual-SMAD inhibition and bone morphogenic protein 4 (BMP4) stimulation for neuruloid induction.
- Single-cell transcriptomics for analyzing cell identity and fate specification.
- Deep neural network analysis for disease modeling.
Main Results:
- Neuruloids successfully recapitulated key aspects of early human neurulation, including neural progenitors, neural crest, sensory placode, and epidermis.
- Single-cell transcriptomics identified precise cell identities and timing of fate specification.
- Molecular mechanisms involving pSMAD1, fibroblast growth factor (FGF), and Wnt signaling were elucidated for neuruloid self-organization.
- Isogenic Huntington's disease hESCs in neuruloids revealed disease-specific phenotypic signatures.
Conclusions:
- Neuruloids represent a powerful, standardized model for studying human embryonic development and cell fate specification.
- This model provides a unique platform for investigating the developmental origins of human diseases.
- The approach enables phenotypic drug screening for neurodevelopmental disorders like Huntington's disease.