Transcriptional neoteny in the human brain.
Proc Natl Acad Sci U S A, 2009/4/07;106(14):5743-8.
Somel M[1], Franz H, Yan Z, Lorenc A, Guo S, Giger T, Kelso J, Nickel B, Dannemann M, Bahn S, Webster MJ, Weickert CS, Lachmann M, Pääbo S, Khaitovich P
Affiliations
PMID: 19307592DOI: 10.1073/pnas.0900544106
Impact factor: 12.779
Abstract
In development, timing is of the utmost importance, and the timing of developmental processes often changes as organisms evolve. In human evolution, developmental retardation, or neoteny, has been proposed as a possible mechanism that contributed to the rise of many human-specific features, including an increase in brain size and the emergence of human-specific cognitive traits. We analyzed mRNA expression in the prefrontal cortex of humans, chimpanzees, and rhesus macaques to determine whether human-specific neotenic changes are present at the gene expression level. We show that the brain transcriptome is dramatically remodeled during postnatal development and that developmental changes in the human brain are indeed delayed relative to other primates. This delay is not uniform across the human transcriptome but affects a specific subset of genes that play a potential role in neural development.
MeSH terms
Animals; Biological Evolution; Brain; Gene Expression Profiling; Gene Expression Regulation, Developmental; Humans; Macaca mulatta; Pan troglodytes; Prefrontal Cortex; RNA, Messenger; Species Specificity
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