Abstract:
In various embodiments methods of determining methylation of DNA are provided. In one illustrative, but non-limiting embodiment the method comprises i) contacting a biological sample comprising a nucleic acid to a first matrix material comprising a first column or filter where said matrix material binds and/or filters nucleic acids in said sample and thereby purifies the DNA; ii) eluting the bound DNA from the first matrix material and denaturing the DNA to produce eluted denatured DNA; iii) heating the eluted DNA in the presence of bisulfite ions to produce a deaminated nucleic acid; iv) contacting said deaminated nucleic acid to a second matrix material comprising a second column to bind said deaminated nucleic acid to said second matrix material; v) desulfonating the bound deaminated nucleic acid and/or simultaneously eluting and desulfonating the nucleic acid by contacting the deaminated nucleic acid with an alkaline solution to produce a bisulfite converted nucleic acid; vi) eluting said bisulfite converted nucleic acid from said second matrix material; and vii) performing methylation specific PCR and/or nucleic acid sequencing, and/or high resolution melting analysis (HRM) on said bisulfite-converted nucleic acid to determine the methylation of said nucleic acid, wherein at least steps iv) through vi) are performed in a single reaction cartridge.
Abstract:
Methods and reagents are provided for the rapid extraction of nucleic acids from a fixed paraffin embedded sample (e.g., a FFPET sample). In some embodiments, the methods comprise incubating one or more sections of said tissue sample in a lysis solution comprising a buffer sufficient to maintain the pH of said solution at a pH ranging from about pH 4 to about pH 9; a chaotropic agent; a chelating agent; and a detergent; where the incubating is at a temperature ranging from about 50 C to about 100 C; and recovering the nucleic acid from said lysis solution.