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<p>The human cerebellum houses roughly 80% of all brain neurons and plays a central role in refining motor timing and coordination. It is also a locus of developmental malformations, spinocerebellar ataxias and medulloblastoma. However, due to its late gestational maturation (weeks 24–40) direct understanding of early human developmental stages is limited. Thanks to recent advances in stem-cell biology that have enabled the generation of cerebellar organoids, self-organizing 3-D cultures derived from human pluripotent stem cells. These organoids can recapitulate aspects of in vivo generation of early granule-cell progenitors, Purkinje neurons and Bergmann glia, offering a powerful platform to study early lineage specification and circuit assembly. Embryonic fate-mapping shows that sequential FGF8, WNT1 and BMP signaling from the isthmic organizer specifies cerebellar territory. Current organoid protocols are designed to reproduce aspects of this developmental signaling cascade within the first six days of differentiation, guiding pluripotent cells toward a cerebellar trajectory. By day ~ 45, these organoids typically contain identifiable granule-cell progenitors and Purkinje neurons, marked by KIRREL2 and CALB1, further supported by single-cell RNA-sequencing. Functionally, cerebellar organoids display early signs of network activity, spontaneous low-frequency network activity and stimulus-evoked calcium transients, including glutamate-responsive signaling, reflecting the emergence of immature synaptic connectivity. Although these dynamics mark a significant step toward modeling human cerebellar physiology, they remain far from the complexity and organization of late-gestation cerebellar networks, which rely on Purkinje cell firing patterns, granule-cell parallel-fiber integration, and structured microcircuitry that current organoids have not yet achieved. In this review we synthesize peer-reviewed studies published through 2025, showing how cerebellar organoids recapitulate key aspects of human cerebellar development, benchmark current differentiation methods, and report early functional activity.</p>

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Integrated systematic profiling establishes the fundamental developmental phenotypes of human cerebellar organoids

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年5月11日

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  • Amruth. K. B. Shaik

摘要

The human cerebellum houses roughly 80% of all brain neurons and plays a central role in refining motor timing and coordination. It is also a locus of developmental malformations, spinocerebellar ataxias and medulloblastoma. However, due to its late gestational maturation (weeks 24–40) direct understanding of early human developmental stages is limited. Thanks to recent advances in stem-cell biology that have enabled the generation of cerebellar organoids, self-organizing 3-D cultures derived from human pluripotent stem cells. These organoids can recapitulate aspects of in vivo generation of early granule-cell progenitors, Purkinje neurons and Bergmann glia, offering a powerful platform to study early lineage specification and circuit assembly. Embryonic fate-mapping shows that sequential FGF8, WNT1 and BMP signaling from the isthmic organizer specifies cerebellar territory. Current organoid protocols are designed to reproduce aspects of this developmental signaling cascade within the first six days of differentiation, guiding pluripotent cells toward a cerebellar trajectory. By day ~ 45, these organoids typically contain identifiable granule-cell progenitors and Purkinje neurons, marked by KIRREL2 and CALB1, further supported by single-cell RNA-sequencing. Functionally, cerebellar organoids display early signs of network activity, spontaneous low-frequency network activity and stimulus-evoked calcium transients, including glutamate-responsive signaling, reflecting the emergence of immature synaptic connectivity. Although these dynamics mark a significant step toward modeling human cerebellar physiology, they remain far from the complexity and organization of late-gestation cerebellar networks, which rely on Purkinje cell firing patterns, granule-cell parallel-fiber integration, and structured microcircuitry that current organoids have not yet achieved. In this review we synthesize peer-reviewed studies published through 2025, showing how cerebellar organoids recapitulate key aspects of human cerebellar development, benchmark current differentiation methods, and report early functional activity.