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Brain assembloids decode human cortical networks in Rett syndrome.

Sisi Chen¹, Yangfei Xiang²

¹School of Life Science and Technology, ShanghaiTech University, Shanghai 201210, China.

|December 13, 2025

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MeCP2 deficiency causes defects in prenatal brain development, impacting cortical neuronal network formation. This research offers new insights into the pathology of Rett syndrome using human brain models.

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Rapid Detection of Neurodevelopmental Phenotypes in Human Neural Precursor Cells NPCs

Rapid Detection of Neurodevelopmental Phenotypes in Human Neural Precursor Cells NPCs

Published on: March 2, 2018

Area of Science:

Neuroscience
Developmental Biology
Genetics

Background:

Rett syndrome is a severe neurodevelopmental disorder.
MeCP2 gene mutations are the primary cause of Rett syndrome.
Understanding MeCP2's role in early brain development is crucial.

Purpose of the Study:

To investigate the impact of MeCP2 deficiency on prenatal cortical development.
To elucidate the cellular and network-level defects caused by MeCP2 loss.
To provide insights into the neuropathology of Rett syndrome.

Main Methods:

Utilized human cerebral organoids and telencephalic assembloids.
Analyzed neuronal network formation and cellular development.
Focused on early prenatal brain development stages.

Main Results:

MeCP2 deficiency resulted in significant defects in cortical neuronal network formation.
Observed multiple abnormalities in the development of prenatal cortical neurons.
Highlighted the critical role of MeCP2 in establishing proper brain circuitry.

Conclusions:

MeCP2 is essential for normal prenatal cortical development and neuronal network assembly.
MeCP2 deficiency leads to developmental neuropathology relevant to Rett syndrome.
Human organoid models are valuable tools for studying neurodevelopmental disorders.