The use of real-time PCR analysis in a gene expression study of Alzheimer's disease post-mortem brains

被引:99
作者
Gutala, RV [1 ]
Reddy, PH [1 ]
机构
[1] Oregon Hlth & Sci Univ, Neurogenet Lab, Inst Neurol Sci, Beaverton, OR 97006 USA
关键词
real-time PCR; post-mortem brains; gene expression; Alzheimer's disease; beta-actin; GAPDH;
D O I
10.1016/j.jneumeth.2003.09.005
中图分类号
Q5 [生物化学];
学科分类号
071010 ; 081704 ;
摘要
The measurement of gene expressions in brains with neurodegenerative diseases is a major area of brain research. The objective of our research was to determine whether quantitative real-time PCR could measure messenger RNA (mRNA) expression in brains with post-mortem intervals beyond 12 h. In the present paper, we examined the quality of RNA from brain specimens of both Alzheimer's disease (AD) patients (n = 13) and non-demented normal control subjects (n = 6). To determine a unregulated endogenous reference gene in AD, we measured mRNA expressions of the commonly used reference genes beta-actin, 18S rRNA, and GAPDH. In addition, we determined whether post-mortem interval, brain weight, or age at death influences mRNA expression. Our real-time PCR analysis results indicate that mRNA expression can be detected in all brain specimens for beta-actin, 18S rRNA, GAPDH, and also synaptophysin, a known marker for AD. Further, using real-time PCR analysis, we found that beta-actin and 18S rRNA are differentially expressed in the brain specimens of both AD and control subjects, while GAPDH is similarly expressed in AD and control brain specimens. These findings suggest that GAPDH can be used as a endogenous reference gene in the study of AD brains. A comparative gene expression analysis also suggests that synaptophysin is down-regulated in AD brain specimens compared to control brain specimens. (C) 2003 Elsevier B.V. All rights reserved.
引用
收藏
页码:101 / 107
页数:7
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