Experimental study reveals progressive chromatin compaction in differentiating motor neurons, highlighting a direct link between microscale architecture and gene regulation.
Key Points
To establish an AI-assisted cryo-electron tomography and segmentation framework to visualize and quantify native 3D chromatin architecture changes during cellular differentiation.
Extracted and vitrified native chromatin across stages of motor neuron differentiation from induced pluripotent stem cells without heavy metal stains or resin embedding.
Applied an AI-assisted cryo-electron tomography (cryo-ET) and segmentation pipeline to carry out 3D density analysis.
Integrated microscale 3D structural imaging results with global genome contact patterns from population-averaged Hi-C experiments.
Three-dimensional density analysis revealed a progressive increase in chromatin compaction as cells advanced along motor neuron lineage commitment.
Microscale higher-order structural shifts visualized in vitrified chromatin were consistent with global chromosomal contact patterns identified by Hi-C.