A method for quantitative measurement of gene expression through multiplex competitive reverse transcriptase polymerase chain reaction amplification has been established which comprises isolating cellular mRNA of a target gene and a housekeeping gene which are then reverse transcribed and specifically amplified in the presence of competitive templates such that a ratio of target to housekeeping gene is obtained and used to assess the amount of gene expression. This method is useful for analysis of the small specimens (cells and tissues) available from human subjects and will allow improved understanding of mechanisms of disease.
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