Characterization of human cortical gene expression in relation to glucose utilization. Issue 3 (4th April 2013)

• Record Type: Journal Article
• Authors: Sterner, Kirstin N.; Mcgowen, Michael R.; Chugani, Harry T.; Tarca, Adi L.; Sherwood, Chet C.; Hof, Patrick R.; Kuzawa, Christopher W.; Boddy, Amy M.; Raaum, Ryan L.; Weckle, Amy; Lipovich, Leonard; Grossman, Lawrence I.; Uddin, Monica; Goodman, Morris; Wildman, Derek E.
• Is Part Of: American journal of human biology. Volume 25:Issue 3(2013:May/Jun.)
• Page Start: 418
• Page End: 430
• Publication Date: 2013-04-04
• Subjects: Human biology -- Periodicals; Physical anthropology -- Periodicals; Biologie humaine -- Périodiques; Anthropologie physique -- Périodiques; 612
• DOI: 10.1002/ajhb.22394
• Languages: English
• ISSNs: 1042-0533

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <sec id="ajhb22394-sec-0001" sec-type="section"> <title>Objectives</title> <p>Human brain development follows a unique pattern characterized by a prolonged period of postnatal growth and reorganization, and a postnatal peak in glucose utilization. The molecular processes underlying these developmental changes are poorly characterized. The objectives of this study were to determine developmental trajectories of gene expression and to examine the evolutionary history of genes differentially expressed as a function of age.</p> </sec> <sec id="ajhb22394-sec-0002" sec-type="section"> <title>Methods</title> <p>We used microarrays to determine age‐related patterns of mRNA expression in human cerebral cortical samples ranging from infancy to adulthood. In contrast to previous developmental gene expression studies of human neocortex that relied on postmortem tissue, we measured mRNA expression from the nondiseased margins of surgically resected tissue. We used regression models designed to identify transcripts that followed significant linear or curvilinear functions of age and used population genetics techniques to examine the evolution of these genes.</p> </sec> <sec id="ajhb22394-sec-0003" sec-type="section"> <title>Results</title> <p>We identified 40 transcripts with significant age‐related trajectories in expression. Ten genes have documented roles in nervous system development and energy metabolism, others are novel candidates in brain development. Sixteen transcripts showed similar patterns of expression, characterized by decreasing expression during childhood. Comparative genomic analyses revealed that the regulatory regions of three genes have evidence of adaptive evolution in recent human evolution.</p> </sec> <sec id="ajhb22394-sec-0004" sec-type="section"> <title>Conclusions</title> <p>These findings provide evidence that a subset of genes expressed in the human cerebral cortex broadly mirror developmental patterns of cortical glucose consumption. Whether there is a causal relationship between gene expression and glucose utilization remains to be determined. Am. J. Hum. Biol. 25:418–430, 2013. © 2013 Wiley Periodicals, Inc.</p> </sec> </abstract>