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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">vestim</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной  академии наук Беларуси. Серия медицинских наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Medical series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1814-6023</issn><issn pub-type="epub">2524-2350</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1814-6023-2025-22-4-314-323</article-id><article-id custom-type="elpub" pub-id-type="custom">vestim-1057</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>КЛИНИЧЕСКАЯ И ЭКСПЕРИМЕНТАЛЬНАЯ МЕДИЦИНА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL AND EXPERIMENTAL MEDICINE</subject></subj-group></article-categories><title-group><article-title>Разработка метода детекции цоДНК у пациентов с немелкоклеточным раком легкого с использованием маркера метилирования RASSF1</article-title><trans-title-group xml:lang="en"><trans-title>Development of a method for detecting ctDNA in patients with non-small cell lung cancer using the RASSF1 methylation marker</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>Смирнов</surname><given-names>С. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Smirnou</surname><given-names>S. Y.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Смирнов Сергей Юрьевич ‒ биолог</p><p>223040, а/г Лесной, Минский р-н</p></bio><bio xml:lang="en"><p>Siarhei Y. Smirnou ‒ biologist</p><p>223040, Lesnoy, Minsk region</p></bio><email xlink:type="simple">rustledeath24@gmail.com</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>Медведь</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Miadzvedz</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Медведь Антонина Викторовна ‒ врач клинической лабораторной диагностики</p><p>223040, а/г Лесной, Минский р-н</p></bio><bio xml:lang="en"><p>Antonina V. Miadzvedz ‒ doctor of clinical laboratory diagnostic</p><p>223040, Lesnoy, Minsk region</p></bio><email xlink:type="simple">dr.medvedav@gmail.com</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>Пивоварчик</surname><given-names>С. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Pivavarchyk</surname><given-names>S. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Пивоварчик Сергей Николаевич ‒ врач-онколог</p><p>223040, а/г Лесной, Минский р-н</p></bio><bio xml:lang="en"><p>Siarhei N. Pivavarchyk ‒ oncologist</p><p>223040, Lesnoy, Minsk region</p></bio><email xlink:type="simple">serginio0290@rambler.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>Вахомчик</surname><given-names>Т. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Vakhomchyk</surname><given-names>T. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Вахомчик Татьяна Георгиевна ‒ врач-радиолог</p><p>223040, а/г Лесной, Минский р-н</p></bio><bio xml:lang="en"><p>Tatsiana G. Vakhomchyk ‒ radiologist</p><p>223040, Lesnoy, Minsk region</p></bio><email xlink:type="simple">chik-city@tut.by</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>Короткевич</surname><given-names>П. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Karatkevich</surname><given-names>P. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Короткевич Павел Евгеньевич ‒ канд. мед. наук, до- цент, заведующий отделением</p><p>223040, а/г Лесной, Минский р-н</p></bio><bio xml:lang="en"><p>Pavel E. Karatkevich ‒ Ph. D. (Med.), Associate Pro- fessor, Head of the Department</p><p>223040, Lesnoy, Minsk region</p></bio><email xlink:type="simple">pavelkorotkevich@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>Субоч</surname><given-names>Е. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Subach</surname><given-names>H. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Субоч Елена Ивановна ‒ канд. мед. наук, доцент, заведующий отделением</p><p>223040, а/г Лесной, Минский р-н</p></bio><bio xml:lang="en"><p>Helen I. Subach ‒ Ph. D. (Med.), Associate Professor, Head of the Department</p><p>223040, Lesnoy, Minsk region</p></bio><email xlink:type="simple">helen_suboch@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>Портянко</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Portyanko</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Портянко Анна Сергеевна ‒ д-р мед. наук, профессор, заведующий лабораторией</p><p>223040, а/г Лесной, Минский р-н</p></bio><bio xml:lang="en"><p>Anna S. Portyanko ‒ D. Sc. (Med.), Professor, Head of the Laboratory</p><p>223040, Lesnoy, Minsk region</p></bio><email xlink:type="simple">a_port@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Республиканский научно-практический центр онкологии и медицинской радиологии  имени Н. Н. Александрова</institution></aff><aff xml:lang="en"><institution>N. N. Alexandrov National Cancer Centre</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>04</day><month>12</month><year>2025</year></pub-date><volume>22</volume><issue>4</issue><fpage>314</fpage><lpage>323</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Смирнов С.Ю., Медведь А.В., Пивоварчик С.Н., Вахомчик Т.Г., Короткевич П.Е., Субоч Е.И., Портянко А.С., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Смирнов С.Ю., Медведь А.В., Пивоварчик С.Н., Вахомчик Т.Г., Короткевич П.Е., Субоч Е.И., Портянко А.С.</copyright-holder><copyright-holder xml:lang="en">Smirnou S.Y., Miadzvedz A.V., Pivavarchyk S.N., Vakhomchyk T.G., Karatkevich P.E., Subach H.I., Portyanko A.S.</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://vestimed.belnauka.by/jour/article/view/1057">https://vestimed.belnauka.by/jour/article/view/1057</self-uri><abstract><p>Аннотация. На основании информации из международной базы данных The Cancer Genome Atlas оценен статус метилирования промотора гена RASSF1 в 57 образцах опухолевой ткани (аденокарцинома и плоскоклеточный рак) и 27 образцах нормальной ткани легкого. Установлены области промотора, характеризующиеся специфичным профилем метилирования при немелкоклеточном раке легкого, включая его различные гистологические формы.</p><p>В рамках проведенного исследования осуществлен дизайн праймеров для метил-специфичной ПЦР, с помощью которой подтверждена возможность использования маркера RASSF1 для детекции опухолевой ДНК. Разработана методика детекции циркулирующей опухолевой ДНК в плазме крови пациентов с немелкоклеточным раком легкого с помощью цифровой капельной ПЦР.</p></abstract><trans-abstract xml:lang="en"><p>Based on information from the international database The Cancer Genome Atlas, the methylation status of the RASSF1 gene promoter was studied in 57 non-small cell lung cancer tissue samples (adenocarcinoma and squamous cell lung carcinoma) and 27 normal lung tissue samples. Promoter regions characterized by specific methylation profiles in non-sm all cell lung cancer, including various histological types, were identified.</p><p>The obtained data was then used to design primers for methylation-specific PCR, thereby confirming the feasibility of using the RASSF1 marker for tumor DNA detection. A methodology for detecting ctDNA in the blood plasma of patients with non-small cell lung cancer was developed using droplet digital PCR.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>немелкоклеточный рак легкого</kwd><kwd>цоДНК</kwd><kwd>RASSF1</kwd><kwd>метилирование</kwd><kwd>цифровая капельная ПЦР</kwd></kwd-group><kwd-group xml:lang="en"><kwd>non-small cell lung cancer</kwd><kwd>ctDNA</kwd><kwd>RASSF1</kwd><kwd>methylation</kwd><kwd>droplet digital PCR</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках гранта БРФФИ М23 РНФ № 131.</funding-statement><funding-statement xml:lang="en">The work was carried out within the framework of the BRFFR М-23 RSF, grant No. 131.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Methylation dynamics of RASSF1A and its impact on cancer / G. Malpeli, G. Innamorati, I. 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