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Enhancing our brains: Genomic mechanisms underlying cortical evolution.

Caitlyn Mitchell1, Debra L Silver2

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|September 3, 2017
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Summary

Human-specific genomic changes in the cerebral cortex drive higher cognitive functions. Understanding these unique genetic alterations is crucial for brain development and neurological disorder research.

Keywords:
Cortical developmentEnhancerGene expressionHARiPSC

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Area of Science:

  • Neuroscience
  • Genomics
  • Evolutionary Biology

Background:

  • The human cerebral cortex governs higher cognitive functions and exhibits unique anatomical and cellular features compared to primates.
  • Genomic studies reveal significant differences between developing human and primate neocortices, stemming from structural variations and point mutations.

Purpose of the Study:

  • To review the identification and characterization of genetic loci unique to the human cerebral cortex.
  • To catalog human-specific genomic changes and discuss their functional interrogation.
  • To explore how advanced technologies are enhancing the study of these unique genetic elements.

Main Methods:

  • Comparative genomics
  • Analysis of structural variations (deletions, duplications)
  • Identification of point mutations in regulatory regions
  • Functional studies in animal models
  • Single-cell RNA sequencing
  • Primate induced pluripotent stem cells (iPSCs)
  • Gene editing technologies

Main Results:

  • Catalog of known human-specific genomic changes in the cerebral cortex.
  • Identification of genetic loci unique to human brain evolution.
  • Demonstration of functional consequences of these changes through various experimental models.

Conclusions:

  • Human-specific genomic alterations play a critical role in the evolution of higher cognitive functions.
  • Understanding these unique genetic changes is essential for comprehending human brain development.
  • Further research is vital for elucidating the role of these genetic differences in human-specific neurological disorders.