Method for determining the presence or absence of methylation in a sample
First Claim
1. A method for determining the presence or absence of methylation of at least one cytosine, or a series of cytosines in cis, in human DNA of a blood sample, a plasma sample, a serum sample or a urine sample from a human individual, comprising:
- (a) providing the sample comprising human DNA,(b) isolating human DNA from the sample;
(c) treating the isolated human DNA with bisulfite to produce bisulfite-treated sulfonated DNA;
(d) heating the bisulfite-treated sulfonated DNA of step (c) to a temperature between 85°
Celsius and 100°
Celsius for between 3 minutes and 18 hours, thereby desulfonating the bisulfite-treated sulfonated DNA;
(e) performing methylation specific amplification on the heated DNA of step (d) without any prior desulfonation step comprising an alkaline reagent, wherein the methylation specific amplification comprises steps of denaturation, annealing two or more primers and extension of the two or more primers;
and(f) detecting the presence or absence of methylation of at least one cytosine, or a series of cytosines in cis when the amplified DNA of step (e) is amplified, thereby determining the presence or absence of methylation of at least one cytosine, or a series of cytosines in cis, in human DNA of the blood sample, the plasma sample, the serum sample or the urine sample from the human individual.
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Accused Products
Abstract
Aspects of the present invention relate to compositions and methods for providing DNA fragments from a remote sample. In particular aspects a remote sample comprising DNA is provided, DNA is isolated from the remote sample, and the isolated DNA is treated in a way which allows differentiation of methylated and unmethylated cytosine. Additional, particular embodiments provide compositions and methods for methylation analysis of DNA derived from a remote sample. Other aspects provide for compositions and methods of whole genome amplification of bisulfite treated DNA. Other aspects provide methods for determining the presence or absence of methylation of at least one cytosine, or a series of cytosines in cis, in human DNA of a blood sample, a plasma sample, a serum sample or a urine sample from a human individual.
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Citations
8 Claims
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1. A method for determining the presence or absence of methylation of at least one cytosine, or a series of cytosines in cis, in human DNA of a blood sample, a plasma sample, a serum sample or a urine sample from a human individual, comprising:
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(a) providing the sample comprising human DNA, (b) isolating human DNA from the sample; (c) treating the isolated human DNA with bisulfite to produce bisulfite-treated sulfonated DNA; (d) heating the bisulfite-treated sulfonated DNA of step (c) to a temperature between 85°
Celsius and 100°
Celsius for between 3 minutes and 18 hours, thereby desulfonating the bisulfite-treated sulfonated DNA;(e) performing methylation specific amplification on the heated DNA of step (d) without any prior desulfonation step comprising an alkaline reagent, wherein the methylation specific amplification comprises steps of denaturation, annealing two or more primers and extension of the two or more primers; and (f) detecting the presence or absence of methylation of at least one cytosine, or a series of cytosines in cis when the amplified DNA of step (e) is amplified, thereby determining the presence or absence of methylation of at least one cytosine, or a series of cytosines in cis, in human DNA of the blood sample, the plasma sample, the serum sample or the urine sample from the human individual. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification