| 摘要 |
Particular aspects of the present invention provide a method for quantification of two different variations of a DNA sequence. Particularly, the invention relates to a quantification of methylated DNA, and for this purpose, the test DNA is converted so that cytosine is converted to uracil, while 5-methylcytosine remains unchanged. The converted DNA is amplified by means of a real-time PCR, wherein two labeled real-time probe types are utilized: one specific for methylated DNA; and one for unmethylated DNA. Preferably, the degree of methylation of the test DNA is calculated from the ratio of the signal intensities of the probes or from the Ct values. The inventive methods have substantial utility for diagnosis and prognosis of cancer and other disorders associated with altered or characteristic DNA methylation status, as well as having substantial utility for analysis of SNPs, allelic expression, and prediction of drug response, drug interactions, among other uses. |
