Abstract
Three-dimensional (3D) brain organoid culture has become an essential tool for investigating human brain development and modeling neurological disorders during the past few years. Given the specific regionalization during brain development, it is important to produce distinct brain organoids that reproduce different brain regions and their interaction. The authors' laboratory recently established the platform to generate brain organoids resembling the medial ganglionic eminence (MGE), a specific brain region responsible for interneurogenesis, and found when fusing with organoid resembling the cortex, the fused organoids enabled modeling of interneuron migration in the brain. This unit describes four basic protocols that have been successfully applied in the authors' laboratory, covering the generation of embryonic body (EB) with neuroectodermal fate, the production of MGE organoids (hMGEOs) and cortical organoids (hCOs), and the fusion of the two organoids.
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