MicroRNA-driven developmental remodeling in the brain distinguishes humans from other primates.

While multiple studies have reported the accelerated evolution of brain gene expression in the human lineage, the mechanisms underlying such changes are unknown. Here, we address this issue from a developmental perspective, by analyzing mRNA and microRNA (miRNA) expression in two brain regions withi...

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Autores principales: Mehmet Somel, Xiling Liu, Lin Tang, Zheng Yan, Haiyang Hu, Song Guo, Xi Jiang, Xiaoyu Zhang, Guohua Xu, Gangcai Xie, Na Li, Yuhui Hu, Wei Chen, Svante Pääbo, Philipp Khaitovich
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Publicado: Public Library of Science (PLoS) 2011
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Acceso en línea:https://doaj.org/article/beca1738ead747b09d1e1f61df0aae29
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spelling oai:doaj.org-article:beca1738ead747b09d1e1f61df0aae292021-11-18T05:36:51ZMicroRNA-driven developmental remodeling in the brain distinguishes humans from other primates.1544-91731545-788510.1371/journal.pbio.1001214https://doaj.org/article/beca1738ead747b09d1e1f61df0aae292011-12-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22162950/pdf/?tool=EBIhttps://doaj.org/toc/1544-9173https://doaj.org/toc/1545-7885While multiple studies have reported the accelerated evolution of brain gene expression in the human lineage, the mechanisms underlying such changes are unknown. Here, we address this issue from a developmental perspective, by analyzing mRNA and microRNA (miRNA) expression in two brain regions within macaques, chimpanzees, and humans throughout their lifespan. We find that constitutive gene expression divergence (species differences independent of age) is comparable between humans and chimpanzees. However, humans display a 3-5 times faster evolutionary rate in divergence of developmental patterns, compared to chimpanzees. Such accelerated evolution of human brain developmental patterns (i) cannot be explained by life-history changes among species, (ii) is twice as pronounced in the prefrontal cortex than the cerebellum, (iii) preferentially affects neuron-related genes, and (iv) unlike constitutive divergence does not depend on cis-regulatory changes, but might be driven by human-specific changes in expression of trans-acting regulators. We show that developmental profiles of miRNAs, as well as their target genes, show the fastest rates of human-specific evolutionary change, and using a combination of computational and experimental methods, we identify miR-92a, miR-454, and miR-320b as possible regulators of human-specific neural development. Our results suggest that different mechanisms underlie adaptive and neutral transcriptome divergence, and that changes in the expression of a few key regulators may have been a major driving force behind rapid evolution of the human brain.Mehmet SomelXiling LiuLin TangZheng YanHaiyang HuSong GuoXi JiangXiaoyu ZhangGuohua XuGangcai XieNa LiYuhui HuWei ChenSvante PääboPhilipp KhaitovichPublic Library of Science (PLoS)articleBiology (General)QH301-705.5ENPLoS Biology, Vol 9, Iss 12, p e1001214 (2011)
institution DOAJ
collection DOAJ
language EN
topic Biology (General)
QH301-705.5
spellingShingle Biology (General)
QH301-705.5
Mehmet Somel
Xiling Liu
Lin Tang
Zheng Yan
Haiyang Hu
Song Guo
Xi Jiang
Xiaoyu Zhang
Guohua Xu
Gangcai Xie
Na Li
Yuhui Hu
Wei Chen
Svante Pääbo
Philipp Khaitovich
MicroRNA-driven developmental remodeling in the brain distinguishes humans from other primates.
description While multiple studies have reported the accelerated evolution of brain gene expression in the human lineage, the mechanisms underlying such changes are unknown. Here, we address this issue from a developmental perspective, by analyzing mRNA and microRNA (miRNA) expression in two brain regions within macaques, chimpanzees, and humans throughout their lifespan. We find that constitutive gene expression divergence (species differences independent of age) is comparable between humans and chimpanzees. However, humans display a 3-5 times faster evolutionary rate in divergence of developmental patterns, compared to chimpanzees. Such accelerated evolution of human brain developmental patterns (i) cannot be explained by life-history changes among species, (ii) is twice as pronounced in the prefrontal cortex than the cerebellum, (iii) preferentially affects neuron-related genes, and (iv) unlike constitutive divergence does not depend on cis-regulatory changes, but might be driven by human-specific changes in expression of trans-acting regulators. We show that developmental profiles of miRNAs, as well as their target genes, show the fastest rates of human-specific evolutionary change, and using a combination of computational and experimental methods, we identify miR-92a, miR-454, and miR-320b as possible regulators of human-specific neural development. Our results suggest that different mechanisms underlie adaptive and neutral transcriptome divergence, and that changes in the expression of a few key regulators may have been a major driving force behind rapid evolution of the human brain.
format article
author Mehmet Somel
Xiling Liu
Lin Tang
Zheng Yan
Haiyang Hu
Song Guo
Xi Jiang
Xiaoyu Zhang
Guohua Xu
Gangcai Xie
Na Li
Yuhui Hu
Wei Chen
Svante Pääbo
Philipp Khaitovich
author_facet Mehmet Somel
Xiling Liu
Lin Tang
Zheng Yan
Haiyang Hu
Song Guo
Xi Jiang
Xiaoyu Zhang
Guohua Xu
Gangcai Xie
Na Li
Yuhui Hu
Wei Chen
Svante Pääbo
Philipp Khaitovich
author_sort Mehmet Somel
title MicroRNA-driven developmental remodeling in the brain distinguishes humans from other primates.
title_short MicroRNA-driven developmental remodeling in the brain distinguishes humans from other primates.
title_full MicroRNA-driven developmental remodeling in the brain distinguishes humans from other primates.
title_fullStr MicroRNA-driven developmental remodeling in the brain distinguishes humans from other primates.
title_full_unstemmed MicroRNA-driven developmental remodeling in the brain distinguishes humans from other primates.
title_sort microrna-driven developmental remodeling in the brain distinguishes humans from other primates.
publisher Public Library of Science (PLoS)
publishDate 2011
url https://doaj.org/article/beca1738ead747b09d1e1f61df0aae29
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