Temporal specification and bilaterality of human neocortical topographic gene expression.

Temporal specification and bilaterality of human neocortical topographic gene expression.
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DOI:
10.1016/j.neuron.2013.11.018
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发表时间:
2014-01-22
期刊:
影响因子:
16.2
通讯作者:
Sestan N
Sestan N
中科院分区:
医学1区
文献类型:
--
作者:
Pletikos M;Sousa AM;Sedmak G;Meyer KA;Zhu Y;Cheng F;Li M;Kawasawa YI;Sestan N

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Transcriptional processes involved in the development of human cerebral neocortex are poorly understood. Here, we analyzed the temporal dynamics and laterality of gene expression in human and macaque monkey neocortex. We found that inter-areal differences exhibit a temporal hourglass pattern, dividing the human neocortical development into three major phases. The first phase, corresponding to prenatal development, is characterized by the highest number of differential expressed genes among areas and gradient-like expression patterns, including those that are different between human and macaque. The second, preadolescent phase, is characterized by lesser inter-areal expression differences and by an increased synchronization of areal transcriptomes. During the third phase, from adolescence onwards, differential expression among areas reappears driven predominantly by a subset of areas, without obvious gradient-like patterns. Analyses of left-right gene expression revealed population-level global symmetry throughout the fetal and postnatal timespan. Thus, human neocortical topographic gene expression is temporally specified and globally symmetric.
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