Generating LGE/CGE Organoids from Human Pluripotent Stem Cell-derived Brain Organoids Without External Signal...

Area of Science:

• Neuroscience
• Stem Cell Biology
• Developmental Biology

Background:

• Human pluripotent stem cell (hPSC)-derived GABAergic neurons hold promise for neurological disorder treatment by restoring inhibitory circuits.
• Current differentiation methods face challenges in efficiency, purity, and subtype specificity.

Purpose of the Study:

• To develop an efficient method for generating lateral/caudal ganglionic eminence (LGE/CGE) organoids (LCOs) from hPSC-derived brain organoids (BOs).
• To characterize the GABAergic neuron subtypes and developmental resemblance of LCOs.
• To establish a platform for disease modeling and cell therapy development.

Main Methods:

• Generating LGE/CGE organoids (LCOs) from hPSC-derived brain organoids (BOs) without external signal induction.
• Utilizing single-cell transcriptomic analysis to compare LCOs with human embryonic neurons.
• Developing a method for selective enrichment of CXCR4+ CGE-type neurons.

Main Results:

• LCOs bud from BOs and are primarily composed of LGE/CGE-type GABAergic neurons that mature into functional inhibitory neurons.
• LCOs exhibit distinct subtype compositions compared to BOs, with abundant CGE-type neurons and potential for striatal medium spiny neuron formation.
• Single-cell transcriptomic data shows LCOs closely resemble human embryonic LGE/CGE neurons at 12-13 gestational weeks.

Conclusions:

• The developed platform enables efficient generation of human LGE/CGE-type GABAergic neurons.
• This method offers improved efficiency, purity, and subtype specificity over current techniques.
• The platform facilitates advancements in disease modeling and cell therapy for neurological disorders.