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<article article-type="research-article" dtd-version="1.3" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">medgen</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинская генетика</journal-title><trans-title-group xml:lang="en"><trans-title>Medical Genetics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-7998</issn><publisher><publisher-name>Publishing House «Genius Media» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.1234/XXXX-XXXX-2016-5-18-23</article-id><article-id custom-type="elpub" pub-id-type="custom">medgen-124</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>МЕЖДУНАРОДНАЯ НАУЧНАЯ КОНФЕРЕНЦИЯ МОЛОДЫХ УЧЕНЫХ «АКТУАЛЬНЫЕ ПРОБЛЕМЫ МЕДИЦИНСКОЙ ГЕНЕТИКИ», 29-30 СЕНТЯБРЯ 2016 Г., Г.ТОМСК</subject></subj-group></article-categories><title-group><article-title>Метилирование отдельных CpG-динуклеотидов в генах сигнального пути Wnt как потенциальный эпигенетический маркер злокачественных новообразований молочной железы</article-title><trans-title-group xml:lang="en"><trans-title>Single CpG methylation of Wnt signalling pathway components as a potential epigenetic marker of breast cancer</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Москалев</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Moskalev</surname><given-names>E. A.</given-names></name></name-alternatives><email xlink:type="simple">moskalyov@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бубнов</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Bubnov</surname><given-names>V. V.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лебедев</surname><given-names>И. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Lebedev</surname><given-names>I. N.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-3"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт патологии, Университет Фридриха-Александра в Эрлангене и Нюрнберге; НИИ медицинской генетики, Томский НИМЦ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Institute of Pathology, Friedrich-Alexander-University of Erlangen-Nuremberg; Research Institute of Medical Genetics; Research Institute of Medical Genetics</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Одесский национальный медицинский университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Odessa National Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>НИИ медицинской генетики, Томский НИМЦ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Research Institute of Medical Genetics</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2016</year></pub-date><pub-date pub-type="epub"><day>07</day><month>10</month><year>2016</year></pub-date><volume>15</volume><issue>5</issue><fpage>18</fpage><lpage>23</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Москалев Е.А., Бубнов В.В., Лебедев И.Н., 2016</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="ru">Москалев Е.А., Бубнов В.В., Лебедев И.Н.</copyright-holder><copyright-holder xml:lang="en">Moskalev E.A., Bubnov V.V., Lebedev I.N.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.medgen-journal.ru/jour/article/view/124">https://www.medgen-journal.ru/jour/article/view/124</self-uri><abstract><p>Актуальность. Аномальные изменения профилей метилирования ДНК в опухолевых клетках обладают высоким потенциалом для применения в качестве онкомаркеров. Злокачественные новообразования молочной железы являются одним из наиболее распространённых типов онкопатологии, в связи с чем идентификация новых молекулярно-генетических диагностических маркеров приобретает особую актуальность. Цель. Целью работы явилась характеристика профилей метилирования генов онкогенного пути Wnt SFRP2 , PYGO1 и WIF1 с точки зрения их потенциального применения в качестве эпигенетических маркеров злокачественных новообразований молочной железы. Материалы и методы. Для характеристики профилей метилирования ДНК вблизи точек начала транскрипции генов-кандидатов использован метод бисульфитного секвенирования. Анализ аналитической чувствительности и специфичности детекции опухолей проводили с помощью кривых ROC в статистическом пакете SPSS. Результаты. В опухолевых образцах обнаружено гиперметилирование исследованных областей генов SFRP2 , PYGO1 и WIF1 , включающих 14, 5 и 7 CpG-динуклеотидов, соответственно. В целом, в опухолях уровень метилирования ДНК был значительно выше, чем в гистологически нормальной ткани. Использование индекса метилирования наиболее информативных единичных CpG-динуклеотидов обеспечило высокие показатели чувствительности и специфичности детекции опухолевых образцов: 88% и 94% (ген SFRP2 , здесь и далее: чувствительность и специфичность), 100% и 81% (ген PYGO1 ), 81% и 88% (ген WIF1 ). Значимых изменений уровня метилирования CpG-динуклеотидов в зависимости от клинической стадии опухолей не обнаружено, что свидетельствует о раннем возникновении аномалий гиперметилирования при развитии рака молочной железы. Выводы. Уровень метилирования отдельных CpG-динуклеотидов генов SFRP2 , PYGO1 и WIF1 позволяет с высокой точностью детектировать образцы злокачественных новообразований молочной железы и представляет интерес в качестве потенциальных диагностических маркеров. Обнаружение аномального гиперметилирования уже на ранних стадиях развития опухоли перспективно в контексте разработки методов ранней онкодиагностики.</p></abstract><trans-abstract xml:lang="en"><p>Background. Aberrant alterations of DNA methylation patterns in tumour cells are recognised as cancer-specific markers with high potential for clinical applications. Breast cancers represent one of the most common malignancies, what necessitates the development of molecular biomarkers to improve their diagnostics. Aim. Current work aimed at DNA methylation profiling of Wnt signalling pathway components SFRP2, PYGO1 and WIF1 and testing the biomarker potential for the detection of breast cancer specimens. Materials and Methods. Bisulfite pyrosequencing was employed for DNA methylation profiling in the vicinity of transcription start sites of the candidate genes. Analytical sensitivity and specificity of cancer detection were calculated using ROC curve analysis and SPSS software package. Results. In the breast cancer specimens, DNA hypermethylation was detected within the explored regions of SFRP2 , PYGO1 and WIF1 that included 14, 5 and 7 CpG-sites, respectively. Generally, a significantly higher methylation degree was found in the cancer specimens than in the histologically normal control tissue. High sensitivity and specificity of cancer detection was achieved when considering the methylation percentages of most informative single CpG-sites as potential biomarkers, namely 88% and 94% ( SFRP2 , hereafter: sensitivity and specificity), 100% and 81% ( PYGO1 ), 81% and 88% ( WIF1 ). No significant difference in the DNA methylation degree was detected at different stages of breast cancer suggesting an early onset of aberrant DNA hypermethylation. Conclusions. Breast cancer specimens can be accurately detected by analysing the methylation degrees of single CpG-sites of the explored genes, which are of interest as potential diagnostic markers. Identification of aberrant DNA hypermethylation pattern already at the early stages of tumour progression holds promise in the context of developing epigenetics-based early diagnostics.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>метилирование ДНК</kwd><kwd>CpG-динуклеотиды</kwd><kwd>эпигенетические биомаркеры</kwd><kwd>злокачественные новообразования молочной железы</kwd><kwd>бисульфитное пиросеквенирование</kwd><kwd>DNA methylation</kwd><kwd>CpG-sites</kwd><kwd>epigenetic biomarkers</kwd><kwd>breast cancer</kwd><kwd>bisulfite pyrosequencing</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Warton K, Samimi G. Methylation of cell-free circulating DNA in the diagnosis of cancer. Front Mol Biosci. 2015;2(13): eCollection.</mixed-citation><mixed-citation xml:lang="en">Warton K, Samimi G. Methylation of cell-free circulating DNA in the diagnosis of cancer. 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