Comparative 3D genome analysis reveals evolutionary innovations of human brain development
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更新:2022-07-07 10:22:17
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摘要
Elucidating the regulatory mechanisms of human brain evolution is essential to understanding human cognition and mental disorders. We generated multi-omics profiles and constructed a high-resolution map of 3D genome architecture of rhesus macaque during corticogenesis. By comparing the 3D genomes of human, macaque and mouse brains, we identified many human-specific chromatin structure changes, including 499 topologically associating domains (TADs) and 1,266 chromatin loops. The human-specific loops are significantly enriched in enhancer-enhancer interactions and the regulated genes show human-specific expression changes in the subplate, a transient zone of the developing brain critical for neural circuit formation and plasticity. There is significant enrichment of young transposable elements (AluY and L1PA) at the human-gained TAD boundaries. Notably, many human-specific sequence changes are located in the human-specific TAD boundaries and loop anchors. Collectively, the presented data highlight the value of comparative 3D genome analyses in dissecting the regulatory mechanisms of brain development and evolution.
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