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Combination of methylated-DNA precipitation and methylation-sensitive restriction enzymes (COMPARE-MS) for the rapid, sensitive and quantitative detection of DNA methylation

Identifieur interne : 000A07 ( Istex/Corpus ); précédent : 000A06; suivant : 000A08

Combination of methylated-DNA precipitation and methylation-sensitive restriction enzymes (COMPARE-MS) for the rapid, sensitive and quantitative detection of DNA methylation

Auteurs : Srinivasan Yegnasubramanian ; Xiaohui Lin ; Michael C. Haffner ; Angelo M. Demarzo ; William G. Nelson

Source :

RBID : ISTEX:4A23170DC133F7E07C7AB7B397DA383106790CFA

Abstract

Hypermethylation of CpG island (CGI) sequences is a nearly universal somatic genome alteration in cancer. Rapid and sensitive detection of DNA hypermethylation would aid in cancer diagnosis and risk stratification. We present a novel technique, called COMPARE-MS, that can rapidly and quantitatively detect CGI hypermethylation with high sensitivity and specificity in hundreds of samples simultaneously. To quantitate CGI hypermethylation, COMPARE-MS uses real-time PCR of DNA that was first digested by methylation-sensitive restriction enzymes and then precipitated by methyl-binding domain polypeptides immobilized on a magnetic solid matrix. We show that COMPARE-MS could detect five genome equivalents of methylated CGIs in a 1000- to 10 000-fold excess of unmethylated DNA. COMPARE-MS was used to rapidly quantitate hypermethylation at multiple CGIs in >155 prostate tissues, including benign and malignant prostate specimens, and prostate cell lines. This analysis showed that GSTP1, MDR1 and PTGS2 CGI hypermethylation as determined by COMPARE-MS could differentiate between malignant and benign prostate with sensitivities >95% and specificities approaching 100%. This novel technology could significantly improve our ability to detect CGI hypermethylation.

Url:
DOI: 10.1093/nar/gnj022

Links to Exploration step

ISTEX:4A23170DC133F7E07C7AB7B397DA383106790CFA

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 The online version of this article has been published under an open access model. Users are entitled to use, reproduce, disseminate, or display the open access version of this article for non-commercial purposes provided that: the original authorship is properly and fully attributed; the Journal and Oxford University Press are attributed as the original place of publication with the correct citation details given; if an article is subsequently reproduced or disseminated not in its entirety but only in part or as a derivative work this must be clearly indicated. For commercial re-use, please contact
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<p>Hypermethylation of CpG island (CGI) sequences is a nearly universal somatic genome alteration in cancer. Rapid and sensitive detection of DNA hypermethylation would aid in cancer diagnosis and risk stratification. We present a novel technique, called COMPARE-MS, that can rapidly and quantitatively detect CGI hypermethylation with high sensitivity and specificity in hundreds of samples simultaneously. To quantitate CGI hypermethylation, COMPARE-MS uses real-time PCR of DNA that was first digested by methylation-sensitive restriction enzymes and then precipitated by methyl-binding domain polypeptides immobilized on a magnetic solid matrix. We show that COMPARE-MS could detect five genome equivalents of methylated CGIs in a 1000- to 10 000-fold excess of unmethylated DNA. COMPARE-MS was used to rapidly quantitate hypermethylation at multiple CGIs in >155 prostate tissues, including benign and malignant prostate specimens, and prostate cell lines. This analysis showed that
<italic>GSTP1</italic>
,
<italic>MDR1</italic>
and
<italic>PTGS2</italic>
CGI hypermethylation as determined by COMPARE-MS could differentiate between malignant and benign prostate with sensitivities >95% and specificities approaching 100%. This novel technology could significantly improve our ability to detect CGI hypermethylation.</p>
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<namePart type="given">Srinivasan</namePart>
<namePart type="family">Yegnasubramanian</namePart>
<affiliation>Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine 1650 Orleans Street, CRB 116, Baltimore, MD 21231, USA</affiliation>
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<namePart type="given">Xiaohui</namePart>
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<affiliation>Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine 1650 Orleans Street, CRB 116, Baltimore, MD 21231, USA</affiliation>
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<namePart type="given">Michael C.</namePart>
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<affiliation>Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine 1650 Orleans Street, CRB 116, Baltimore, MD 21231, USA</affiliation>
<affiliation>Innsbruck Medical University, Christoph-Probst-Platz 1 Innrain 52, A-6020 Innsbruck, Austria</affiliation>
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<namePart type="given">Angelo M.</namePart>
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<affiliation>Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine 1650 Orleans Street, CRB 116, Baltimore, MD 21231, USA</affiliation>
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<namePart type="family">Nelson</namePart>
<affiliation>Sidney Kimmel Comprehensive Cancer Center, The Johns Hopkins University School of Medicine 1650 Orleans Street, CRB 116, Baltimore, MD 21231, USA</affiliation>
<affiliation>To whom correspondence should be addressed. Tel: +1 410 614 1661; Fax: +1 410 502 9817; Email: bnelson@jhmi.edu</affiliation>
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<abstract lang="en">Hypermethylation of CpG island (CGI) sequences is a nearly universal somatic genome alteration in cancer. Rapid and sensitive detection of DNA hypermethylation would aid in cancer diagnosis and risk stratification. We present a novel technique, called COMPARE-MS, that can rapidly and quantitatively detect CGI hypermethylation with high sensitivity and specificity in hundreds of samples simultaneously. To quantitate CGI hypermethylation, COMPARE-MS uses real-time PCR of DNA that was first digested by methylation-sensitive restriction enzymes and then precipitated by methyl-binding domain polypeptides immobilized on a magnetic solid matrix. We show that COMPARE-MS could detect five genome equivalents of methylated CGIs in a 1000- to 10 000-fold excess of unmethylated DNA. COMPARE-MS was used to rapidly quantitate hypermethylation at multiple CGIs in >155 prostate tissues, including benign and malignant prostate specimens, and prostate cell lines. This analysis showed that GSTP1, MDR1 and PTGS2 CGI hypermethylation as determined by COMPARE-MS could differentiate between malignant and benign prostate with sensitivities >95% and specificities approaching 100%. This novel technology could significantly improve our ability to detect CGI hypermethylation.</abstract>
<note type="author-notes">*To whom correspondence should be addressed. Tel: +1 410 614 1661; Fax: +1 410 502 9817; Email: bnelson@jhmi.edu</note>
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