Volume 125, Issue 12 pp. 2995-3002
Short Report

DNA methylation analysis in liquid-based cytology for cervical cancer screening

Sophia Apostolidou

Sophia Apostolidou

Department of Gynecological Oncology, Institute for Women's Health, University College London, London WC1E 6DH, United Kingdom

Sophia Apostolidou and Richard Hadwin contributed equally to this work.

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Richard Hadwin

Richard Hadwin

Department of Gynecological Oncology, Institute for Women's Health, University College London, London WC1E 6DH, United Kingdom

Sophia Apostolidou and Richard Hadwin contributed equally to this work.

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Matthew Burnell

Matthew Burnell

Department of Gynecological Oncology, Institute for Women's Health, University College London, London WC1E 6DH, United Kingdom

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Allison Jones

Allison Jones

Department of Gynecological Oncology, Institute for Women's Health, University College London, London WC1E 6DH, United Kingdom

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Donna Baff

Donna Baff

Department of Histopathology, University College London, London WC1E 6JJ, United Kingdom

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Nitisha Pyndiah

Nitisha Pyndiah

Virus Reference Department, Centre for Infections, Health Protection Agency, Colindale, London NW9 5HT, United Kingdom

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Tim Mould

Tim Mould

Department of Gynecological Oncology, Institute for Women's Health, University College London, London WC1E 6DH, United Kingdom

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Ian J. Jacobs

Ian J. Jacobs

Department of Gynecological Oncology, Institute for Women's Health, University College London, London WC1E 6DH, United Kingdom

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Simon Beddows

Simon Beddows

Virus Reference Department, Centre for Infections, Health Protection Agency, Colindale, London NW9 5HT, United Kingdom

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Gabrijela Kocjan

Gabrijela Kocjan

Department of Histopathology, University College London, London WC1E 6JJ, United Kingdom

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Martin Widschwendter

Corresponding Author

Martin Widschwendter

Department of Gynecological Oncology, Institute for Women's Health, University College London, London WC1E 6DH, United Kingdom

Fax: ++44020-7380-9748.

Department of Gynecological Oncology, Institute for Women's Health, University College London, 1st Floor, Maple House, 149 Tottenham Court Road, London, W1T 7DN, United KingdomSearch for more papers by this author
First published: 16 July 2009
Citations: 48

Abstract

Cervical cancer is the second most common type of cancer in women worldwide. Preinvasive disease can be detected by cervical cytology. All currently available cytology technologies rely on the visual analysis of exfoliated cells from the uterine cervix. Improvement of conventional cytological screening has been proposed by the introduction of molecular-based markers applied to liquid-based cytology (LBC), the suspension of cells collected from the cervix. DNA methylation changes occur very early in carcinogenesis and identification of appropriate DNA methylation markers in such samples should be able to distinguish high-grade squamous intraepithelial lesions (HSIL) from nonspecific cytology changes and the normal cervix. To address this potential, we have undertaken a proof-of-principle study of methylation status of LBC samples from HSIL cytology cases compared against matched normal controls. Using quantitative methylation-specific PCR on 28 genes, we found SOX1, HOXA11 and CADM1 to significantly discriminate between the groups analyzed (p < 0.01). Area under the receiver operating characteristic (ROC) curve (AUC) demonstrated that methylation of SOX1, HOXA11 and CADM1 could discriminate between HSIL cases and controls with high sensitivity and specificity (AUC 0.910, 0.844 and 0.760, respectively). The results were further validated in an independent set. This proof-of-principle study is the first to validate the results in an independent case/control set and presents HOXA11, a gene that is important for cervical development, as a potentially useful DNA marker in LBC samples. Further assessment of these preliminary estimates will need to be performed in a larger cohort to confirm clinical utility. © 2009 UICC

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