公开(公告)号：US11603555B2

公开(公告)日：2023-03-14

申请号：US15182394

申请日：2016-06-14

Applicant: Cepheid

Inventor： Edwin W. Lai ,  Andrew Kohlway ,  Reuel Vanatta ,  Russell Higuchi ,  Alexander Gall ,  Kriszten Kocmond

IPC: C12Q1/6806 ,  C12Q1/6827 ,  C12Q1/6886 ,  C12N15/10 ,  B01L7/00

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.