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Molecular features driving cellular and regulatory complexity of human brain evolution

ABSTRACT: This SuperSeries is composed of the SubSeries listed below.

ORGANISM(S): Homo sapiens Pan troglodytes Macaca mulatta

PROVIDER: GSE192774 | GEO | 2023/04/26

REPOSITORIES: GEO

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Molecular features driving cellular and regulatory complexity of human brain evolution [RNA-seq]

Project description:Genomic changes acquired in human evolution contribute to the unique abilities of human brain. However, characterizing the molecular underpinnings of human-specific traits is a multifaceted challenge due to the cellular heterogeneity of human brain and complex regulation of gene expression. Here, we performed single-nuclei RNA-sequencing (snRNA-seq) and single-nuclei ATAC-seq (snATAC-seq) in human, chimpanzee, and rhesus macaque brain tissue (brodmann area 23, posterior cingulate cortex). Human-specific changes were distinct among neuronal subtypes indicating that human brain evolution was accompanied by molecular alterations in finer cellular resolution. We also observed more human-specific alterations in epigenome compared to transcriptome. Interestingly, human-specific accessibility changes in neurons were not as concordant with gene expression changes in comparison to other species, partially explaining this discrepancy. These cis-regulatory elements were enriched for immediate early gene motifs, identifying accelerated evolution of activity regulated genes in humans. We also uncovered associations between human evolution and brain disease genes at the cell type level. Together, these results reveal multiple mechanisms for human brain evolution at cell type resolution and establish the first direct evidence for accelerated human-specificity of activity-dependent molecular changes.

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Molecular features driving cellular and regulatory complexity of human brain evolution

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Project description:This SuperSeries is composed of the SubSeries listed below. Refer to individual Series

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Project description:This SuperSeries is composed of the SubSeries listed below.

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