Scalable Generation of Mature Cerebellar Organoids from Human Pluripotent Stem Cells and Characterization by Immunostaining

This publication is a protocol that describes reproducible generation and characterization of cerebellar organoids from human pluripotent stem cells using chemically defined culture conditions and single-use Vertical-Wheel bioreactors. The workflow supports three-dimensional expansion, neural commitment, cerebellar specification, and maturation while avoiding organoid encapsulation in extracellular matrix hydrogels. Detailed procedures cover cell preparation, aggregate culture, differentiation, organoid collection, cryosectioning, immunostaining, and evaluation of spatial organization. Molecular and protein markers are used to identify cerebellar populations and assess proliferation, differentiation, apoptosis, and organoid architecture. The dynamic bioreactor environment supports production of larger organoid quantities with controlled aggregate shape and size. The protocol is intended for disease modeling, neurodevelopmental studies, regenerative medicine research, and scalable production of cerebellar tissue models.