[BioC] Different expression direction between limma microarray data analysis vs quantitative real time PCR result
Naomi Altman
naomi at stat.psu.edu
Mon Sep 21 07:08:15 CEST 2009
False discoveries?
--Naomi
At 12:38 AM 9/21/2009, jixinwang at tamu.edu wrote:
>Dear all, I use limma package to do microarray
>data analysis and most of real time PCR
>validation results are consistent with
>microarray data in terms of expression direction
>and statistical significance. However in one set
>of experiemnts, two DE genes are statistically
>significant in both of microarray and qRT-PCR
>result BUT had the different expression
>direction. (e.g. They are down regulated in
>microarray result but real time PCR result
>showed that they are up regulated)? I donât
>know why. Does this occur to anyone before? Many
>thanks. Best regards, Wang
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Naomi S. Altman 814-865-3791 (voice)
Associate Professor
Dept. of Statistics 814-863-7114 (fax)
Penn State University 814-865-1348 (Statistics)
University Park, PA 16802-2111
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