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Fine-scale analysis of the human brain yields insight into its distinctive composition
Date:4/12/2012

Scientists at the Allen Institute for Brain Science have identified similarities and differences among regions of the human brain, among the brains of human individuals, and between humans and mice by analyzing the expression of approximately 1,000 genes in the brain. The study, published online today in the journal Cell, sheds light on the human brain in general and also serves as an introduction to what the associated publicly available dataset can offer the scientific community.

This study reveals a high degree of similarity among human individuals. Only 5% of the nearly 1,000 genes surveyed in three particular regions show differences in expression between humans. In addition, comparison of this dataset to data in the Allen Mouse Brain Atlas indicates great consistency between humans and mice, as the human visual cortex appears to share 79% of its gene expression with that of the mouse.

The dataset, which is publicly available online via the Allen Brain Atlas data portal (www.brain-map.org) as part of the Allen Human Brain Atlas, holds promise for spurring further discoveries across the research community. Specifically, it contains detailed, cellular-level in situ hybridization gene expression data for about 1,000 genes, selected for their involvement in disease or neural function, in two distinct cortical areas of several disease-free adult human brains, both male and female.

Genes analyzed in this study fall into three categories: genes that serve as indicators of cell types found in the cortex, genes that are related to particular neural functions or diseases of the central nervous system, and genes that hold value for understanding the neural evolution of different species.

Human brain

The analysis published today reveals high consistency of gene expression among different regions of the human cortexthe outer rind of the mammalian brain responsi
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Contact: Steven Cooper
press@alleninstitute.org
646-358-2765
Allen Institute for Brain Science
Source:Eurekalert

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