PreprintCited by 251Genetics and Neurodevelopmental DisordersNeurogenesis and neuroplasticity mechanismsPrimate Behavior and Ecology

Extension of cortical synaptic development distinguishes humans from chimpanzees and macaques

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Liu, Xiling, Somel, Mehmet, Tang, Lin, Yan, Zheng, Jiang, Xi, Guo, Song, Yuan, Yuan, He, Liu +8 more·2012·Genome Research

Abstract

Over the course of ontogenesis, the human brain and human cognitive abilities develop in parallel, resulting in a phenotype strikingly distinct from that of other primates. Here, we used microarrays and RNA-sequencing to examine human-specific gene expression changes taking place during postnatal brain development in the prefrontal cortex and cerebellum of humans, chimpanzees, and rhesus macaques. We show that the most prominent human-specific expression change affects genes associated with synaptic functions and represents an extreme shift in the timing of synaptic development in the prefrontal cortex, but not the cerebellum. Consequently, peak expression of synaptic genes in the prefrontal cortex is shifted from <1 yr in chimpanzees and macaques to 5 yr in humans. This result was supported by protein expression profiles of synaptic density markers and by direct observation of synaptic density by electron microscopy. Mechanistically, the human-specific change in timing of synaptic development involves the MEF2A-mediated activity-dependent regulatory pathway. Evolutionarily, this change may have taken place after the split of the human and the Neanderthal lineages.

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Crossref · 10.1101/gr.127324.111

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  • Comparison with the chimpanzee also indicates human neoteny, although less pronounced.

    “comparison with the chimpanzee also indicates human neoteny, although less pronounced”

    From Xenotransplanted human cortical neurons reveal species-specific development and functional integration into mouse visual circuits (2019) · cites this paper as Liu et al., 2012

    The paper’s Discussion reports delayed prefrontal cortical synaptic development in humans relative to chimpanzees, supporting the comparison as evidence of human neoteny. It does not establish that the delay relative to chimpanzees is less pronounced than the delay relative to macaques; it describes synaptic-gene expression in both comparison species as peaking shortly after birth. No page number is available in our copy. (LLM, conf=0.82)

    Experimental — accuracy not yet measured
  • Changes to regulatory regions may have had important functional consequences for the emergence of the human cognitive phenotype.

    “suggesting that changes to regulatory regions may have had important functional consequences for the emergence of the human cognitive phenotype.”

    From Glutamate receptors in domestication and modern human evolution (2020) · cites this paper as Liu et al., 2012

  • There are significant differences between humans and chimpanzees in the cortical expression of glutamate receptor genes.

    “Despite this high structural conservation, there are significant differences between humans and chimpanzees in the cortical expression of glutamate receptor genes (Liu et al., 2012;Muntané et al., 2015), suggesting that changes to regulatory regions may have had important functional consequences for the emergence of the human cognitive phenotype.”

    From Glutamate receptors in domestication and modern human evolution (2020) · cites this paper as Liu et al., 2012

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  1. McNamara KJ. 1997. Shapes of time. Johns Hopkins University Press, Baltimore.

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Authors
Liu, X., Somel, M., Tang, L., Yan, Z., Jiang, X., Guo, S., Yuan, Y., He, L., Oleksiak, A., Zhang, Y., Li, N., Hu, Y., Chen, W., Qiu, Z., Pääbo, S., & Khaitovich, P.
Affiliations
  • Chinese Academy of Sciences (CN)
  • La Trobe University (AU)
  • Max Delbrück Center (DE)
  • Max Planck Institute for Evolutionary Anthropology (DE)
Venue
Genome Research
Published
2012-02-02
Volume
22
Issue
4
Pages
611-622
ISSN
1088-9051 (ISSN-L)
OpenAlex
W2105507567
Cited by
251
References
71
Citations by year
2026: 14 · 2025: 10 · 2024: 12 · 2023: 23 · 2022: 9 · 2021: 14 · 2020: 32 · 2019: 19 · 2018: 15 · 2017: 19 · 2016: 22 · 2015: 18 · 2014: 18 · 2013: 20 · 2012: 6
Type
posted content
Language
en
Open access
Locations
  • Genome Research (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • MDC Repository (Max-Delbrueck-Center for Molecular Medicine) (acceptedVersion)
  • MPG.PuRe (Max Planck Society) (submittedVersion, other-oa)
  • OpenMETU (Middle East Technical University) (submittedVersion, cc-by-nc-nd)
  • HighWire Press Open Archive (submittedVersion)
Funders
  • European Molecular Biology Organization
  • National Natural Science Foundation of China
  • Chinese Academy of Sciences (KSCX2-YW-R)
  • Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences
  • Ministry of Science and Technology of the People's Republic of China (2011CBA00400)
  • Universität Zürich
  • Directorate for Biological Sciences
  • National Key Research and Development Program of China (2011CBA00400)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Neurodevelopmental Disorders
  • Life Sciences › Neuroscience › Developmental Neuroscience › Neurogenesis and neuroplasticity mechanisms
  • Social Sciences › Psychology › Social Psychology › Primate Behavior and Ecology
Keywords
human brain evolution, synaptic development, prefrontal cortex, cerebellum, chimpanzees, rhesus monkeys, synaptic genes, synaptic density, MEF2A, activity-dependent regulation, postnatal brain development
MeSH terms
Adolescent, Adult, Aged, Aged, 80 and over, Animals, Cerebellum, Child, Child, Preschool, Pan troglodytes, Humans, Infant, Infant, Newborn, Macaca mulatta, Middle Aged, Neuromuscular Junction, Species Specificity, Synapses, Prefrontal Cortex, Sequence Analysis, RNA, Gene Expression Regulation, Developmental, Evolution, Molecular, Oligonucleotide Array Sequence Analysis, Gene Expression Profiling, Young Adult

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