| 摘要 |
<p>Herein described is a method for the detection of cyto-sine methylation in a nucleic acid sample, comprising the steps of: a) treating a nucleic acid sample with an agent convert-ing unmethylated cytosine bases into uracil bases and not converting methylated cytosine bases within said nucleic acid sample, b) amplifying selected segments of the treated nucleic acid sample, by providing two first oligonucleotide primers (A and B) that are capable of producing an amplificate under certain chosen amplification conditions inde-pendently of the methylation status of the nucleic acid before treatment in step a), and further providing at least two additional second oligonucleotide primers (C and D) that can each produce a product with one of the first primers (A or B) under said same amplification conditions, wherein at least one of the second primers binds to the nucleic acid in a methylation specific manner, thereby distinguishing between unconverted initially methylated and converted unmethylated nucleic acids and/or blocking molecules are provided that hinder the binding of at least one of the second primers to the nucleic acid in a methylation specific manner, thereby distinguishing between unconverted initially methylated and converted unmethylated nucleic acids, c) detecting the amplificates of the treated nucleic acid.</p> |
