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Exon Microarray Analysis of Human Dorsolateral Prefrontal Cortex in Alcoholism
Author(s) -
Manzardo Ann M.,
Gunewardena Sumedha,
Wang Kun,
Butler Merlin G.
Publication year - 2014
Publication title -
alcoholism: clinical and experimental research
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.267
H-Index - 153
eISSN - 1530-0277
pISSN - 0145-6008
DOI - 10.1111/acer.12429
Subject(s) - dorsolateral prefrontal cortex , biology , microarray , exon , microarray analysis techniques , gene expression , prefrontal cortex , human brain , gene , genetics , neuroscience , cognition
Background Alcohol abuse is associated with cellular and biochemical disturbances that impact upon protein and nucleic acid synthesis, brain development, function, and behavioral responses. To further characterize the genetic influences in alcoholism and the effects of alcohol consumption on gene expression, we used a highly sensitive exon microarray to examine m RNA expression in human frontal cortex of alcoholics and control males. Methods Messenger RNA was isolated from the dorsolateral prefrontal cortex (dl PFC ; Brodmann area 9) of 7 adult alcoholic (6 males, 1 female, mean age 49 years) and 7 matched controls. Affymetrix Human Exon 1.0 ST array was performed according to standard procedures and the results analyzed at the gene level. Microarray findings were validated using quantitative reverse transcription polymerase chain reaction, and the ontology of disturbed genes characterized using Ingenuity Pathway Analysis (IPA). Results Decreased m RNA expression was observed for genes involved in cellular adhesion (e.g., CTNNA3 , ITGA2 ), transport (e.g., TF , ABCA8 ), nervous system development (e.g., LRP2 , UGT8 , GLDN ), and signaling (e.g., RASGRP3 , LGR5 ) with influence over lipid and myelin synthesis (e.g., ASPA , ENPP2 , KLK6 ). IPA identified disturbances in network functions associated with neurological disease and development including cellular assembly and organization impacting on psychological disorders. Conclusions Our data in alcoholism support a reduction in expression of dl PFC m RNA for genes involved with neuronal growth, differentiation, and signaling that targets white matter of the brain.