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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Almanac of Clinical Medicine</journal-id><journal-title-group><journal-title xml:lang="en">Almanac of Clinical Medicine</journal-title><trans-title-group xml:lang="ru"><trans-title>Альманах клинической медицины</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2072-0505</issn><issn publication-format="electronic">2587-9294</issn><publisher><publisher-name xml:lang="en">Moscow Regional Research and Clinical Institute (MONIKI)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">17229</article-id><article-id pub-id-type="doi">10.18786/2072-0505-2024-52-016</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Detection of colorectal cancer associated circular RNAs hsa_circ_0031263, hsa_circ_0072715, and hsa_circ_0136666 in plasma with nanowire chips</article-title><trans-title-group xml:lang="ru"><trans-title>Детекция кольцевых РНК hsa_circ_0031263, hsa_circ_0072715 и hsa_circ_0136666, ассоциированных с колоректальным раком, в плазме крови с помощью нанопроводных чипов</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5041-1914</contrib-id><contrib-id contrib-id-type="scopus">7202332547</contrib-id><contrib-id contrib-id-type="researcherid">F-5608-2017</contrib-id><contrib-id contrib-id-type="spin">7935-0461</contrib-id><name-alternatives><name xml:lang="en"><surname>Ivanov</surname><given-names>Yuri D.</given-names></name><name xml:lang="ru"><surname>Иванов</surname><given-names>Юрий Дмитриевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Biol. Sci., Professor, Head of Laboratory of Nanobiotechnology; Leading Research Fellow</p></bio><bio xml:lang="ru"><p>д-р биол. наук, профессор, зав. лабораторией нанобиотехнологии, вед. науч. сотр.</p></bio><email>yurii.ivanov.nata@gmail.com</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2767-2299</contrib-id><name-alternatives><name xml:lang="en"><surname>Nevedrova</surname><given-names>Ekaterina D.</given-names></name><name xml:lang="ru"><surname>Неведрова</surname><given-names>Екатерина Дмитриевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Junior Research Fellow, Laboratory of Nanobiotechnology</p></bio><bio xml:lang="ru"><p>мл. науч. сотр., лаборатория нанобиотехнологии</p></bio><email>nevedrova.kat@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0001-6044-3490</contrib-id><name-alternatives><name xml:lang="en"><surname>Vinogradova</surname><given-names>Angelina V.</given-names></name><name xml:lang="ru"><surname>Виноградова</surname><given-names>Ангелина Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Junior Research Fellow, Laboratory of Nanobiotechnology</p></bio><bio xml:lang="ru"><p>мл. науч. сотр., лаборатория нанобиотехнологии</p></bio><email>angeluna1234@bk.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4082-1247</contrib-id><contrib-id contrib-id-type="scopus">57287158900</contrib-id><contrib-id contrib-id-type="researcherid">AAC-8364-2022</contrib-id><name-alternatives><name xml:lang="en"><surname>Goldaeva</surname><given-names>Kristina V.</given-names></name><name xml:lang="ru"><surname>Голдаева</surname><given-names>Кристина Витальевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Junior Research Fellow, World-Class Research Center</p></bio><bio xml:lang="ru"><p>мл. науч. сотр., Научный центр мирового уровня</p></bio><email>goldaeva_1996@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3217-9095</contrib-id><contrib-id contrib-id-type="scopus">6602765854</contrib-id><contrib-id contrib-id-type="researcherid">D-9167-2012</contrib-id><name-alternatives><name xml:lang="en"><surname>Pleshakova</surname><given-names>Tatyana O.</given-names></name><name xml:lang="ru"><surname>Плешакова</surname><given-names>Татьяна Олеговна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Biol. Sci., Deputy Director</p></bio><bio xml:lang="ru"><p>д-р биол. наук, заместитель директора по научной работе</p></bio><email>topleshakova@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Galiullin</surname><given-names>Rafael A.</given-names></name><name xml:lang="ru"><surname>Галиуллин</surname><given-names>Рафаэль Анварович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Leading Programmer, Laboratory for Research of Single Biomacromolecules</p></bio><bio xml:lang="ru"><p>ведущий программист лаборатории исследований единичных биомакромолекул</p></bio><email>rafael.anvarovich@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ableev</surname><given-names>Alexander N.</given-names></name><name xml:lang="ru"><surname>Аблеев</surname><given-names>Александр Нариманович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Leading Engineer, Laboratory of Nanobiotechnology</p></bio><bio xml:lang="ru"><p>ведущий инженер лаборатории нанобиотехнологии</p></bio><email>ableev@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9795-7065</contrib-id><contrib-id contrib-id-type="scopus">55453193700</contrib-id><contrib-id contrib-id-type="researcherid">F-5586-2017</contrib-id><contrib-id contrib-id-type="spin">3827-1620</contrib-id><name-alternatives><name xml:lang="en"><surname>Shumov</surname><given-names>Ivan D.</given-names></name><name xml:lang="ru"><surname>Шумов</surname><given-names>Иван Дмитриевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (in Biol.), Research Fellow, Laboratory of Nanobiotechnology</p></bio><bio xml:lang="ru"><p>канд. биол. наук, науч. сотр. лаборатории нанобиотехнологии</p></bio><email>shum230988@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2117-8743</contrib-id><name-alternatives><name xml:lang="en"><surname>Kozlov</surname><given-names>Andrey F.</given-names></name><name xml:lang="ru"><surname>Козлов</surname><given-names>Андрей Федорович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Leading Engineer, Laboratory of Nanobiotechnology</p></bio><bio xml:lang="ru"><p>ведущий инженер лаборатории нанобиотехнологии</p></bio><email>afkozlow@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7415-1405</contrib-id><name-alternatives><name xml:lang="en"><surname>Popov</surname><given-names>Vladimir P.</given-names></name><name xml:lang="ru"><surname>Попов</surname><given-names>Владимир Павлович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Phys.-Math. Sci., Head of the Laboratory of Silicon Material Science</p></bio><bio xml:lang="ru"><p>д-р физ.-мат. наук, зав. лабораторией № 10 физических основ материаловедения кремния</p></bio><email>popov@isp.nsc.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3898-4127</contrib-id><name-alternatives><name xml:lang="en"><surname>Kushlinskii</surname><given-names>Nikolay E.</given-names></name><name xml:lang="ru"><surname>Кушлинский</surname><given-names>Николай Евгеньевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD, Professor, Member of Russ. Acad. Sci., Scientific Director of the Clinical Diagnostic Laboratory, Consultative and Diagnostic Center</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор, академик РАН, научный руководитель клинико-диагностической лаборатории консультативно-диагностического центра</p></bio><email>biochimia@yandex.ru</email><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0493-1166</contrib-id><name-alternatives><name xml:lang="en"><surname>Stilidi</surname><given-names>Ivan S.</given-names></name><name xml:lang="ru"><surname>Стилиди</surname><given-names>Иван Сократович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD, Professor, Member of Russ. Acad. Sci., Director</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор, академик РАН, директор</p></bio><email>info@ronc.ru</email><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9289-1247</contrib-id><name-alternatives><name xml:lang="en"><surname>Mamedli</surname><given-names>Zaman Z.</given-names></name><name xml:lang="ru"><surname>Мамедли</surname><given-names>Заман Заурович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD, Associate Professor, Head of the Department of Abdominal Oncology No. 3 (coloproctology)</p></bio><bio xml:lang="ru"><p>д-р мед. наук, доцент, зав. отделением абдоминальной онкологии № 3 (колопроктологии)</p></bio><email>z.z.mamedli@gmail.com</email><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7169-2209</contrib-id><name-alternatives><name xml:lang="en"><surname>Enikeev</surname><given-names>Dmitry V.</given-names></name><name xml:lang="ru"><surname>Еникеев</surname><given-names>Дмитрий Викторович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD, Professor, Urologist Surgeon, Institute for Urology and Reproductive Health</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор, хирург-уролог, Институт урологии и репродуктивного здоровья человека</p></bio><email>enikeev_dv@mail.ru</email><xref ref-type="aff" rid="aff5"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9947-9725</contrib-id><name-alternatives><name xml:lang="en"><surname>Potoldykova</surname><given-names>Natalia V.</given-names></name><name xml:lang="ru"><surname>Потолдыкова</surname><given-names>Наталья Валерьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Urologist Surgeon, Institute for Urology and Reproductive Health</p></bio><bio xml:lang="ru"><p>врач-уролог, Институт урологии и репродуктивного здоровья человека</p></bio><email>natalis8282@mail.ru</email><xref ref-type="aff" rid="aff5"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1566-1771</contrib-id><name-alternatives><name xml:lang="en"><surname>Konev</surname><given-names>Vladimir A.</given-names></name><name xml:lang="ru"><surname>Конев</surname><given-names>Владимир Александрович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD, Associate Professor, Department of Infectious Diseases in Children, Faculty of Pediatrics</p></bio><bio xml:lang="ru"><p>канд. мед. наук, доцент, кафедра инфекционных болезней у детей, педиатрический факультет</p></bio><email>konev60@mail.ru</email><xref ref-type="aff" rid="aff6"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0273-6700</contrib-id><name-alternatives><name xml:lang="en"><surname>Kovalev</surname><given-names>Oleg B.</given-names></name><name xml:lang="ru"><surname>Ковалев</surname><given-names>Олег Борисович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, PhD, Professor, Department of Infectious Diseases in Children, Faculty of Pediatrics</p></bio><bio xml:lang="ru"><p>д-р мед. наук, профессор, кафедра инфекционных болезней у детей, педиатрический факультет</p></bio><email>doctor87@list.ru</email><xref ref-type="aff" rid="aff6"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7942-3337</contrib-id><name-alternatives><name xml:lang="en"><surname>Ziborov</surname><given-names>Vadim S.</given-names></name><name xml:lang="ru"><surname>Зиборов</surname><given-names>Вадим Серафимович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (in Phys.-Math.), Senior Research Fellow, Laboratory of Shock-Wave Impacts; Leading Specialist, Laboratory of Nanobiotechnology</p></bio><bio xml:lang="ru"><p>канд. физ.-мат. наук, ст. науч. сотр. лаборатории № 6.2 (ударно-волновых воздействий); ведущий специалист лаборатории нанобиотехнологии</p></bio><email>ziborov.vs@yandex.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Grishin</surname><given-names>Leonid I.</given-names></name><name xml:lang="ru"><surname>Гришин</surname><given-names>Леонид Игоревич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Research Fellow, Laboratory of Shock-Wave Impacts</p></bio><bio xml:lang="ru"><p>науч. сотр. лаборатории № 6.2 (ударно-волновых воздействий)</p></bio><email>lenya-grishin@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7054-7341</contrib-id><name-alternatives><name xml:lang="en"><surname>Dolgoborodov</surname><given-names>Alexander Y.</given-names></name><name xml:lang="ru"><surname>Долгобородов</surname><given-names>Александр Юрьевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Phys.-Math. Sci., Head of the Laboratory of Shock-Wave Impacts</p></bio><bio xml:lang="ru"><p>д-р физ.-мат. наук, зав. лабораторией № 6.2 (ударно-волновых воздействий)</p></bio><email>aldol@ihed.ras.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Petrov</surname><given-names>Oleg F.</given-names></name><name xml:lang="ru"><surname>Петров</surname><given-names>Олег Федорович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Phys.-Math. Sci., Member of Russ. Acad. Sci., Director</p></bio><bio xml:lang="ru"><p>д-р физ.-мат. наук, академик РАН, директор</p></bio><email>ofpetrov@ihed.ras.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2290-8090</contrib-id><name-alternatives><name xml:lang="en"><surname>Archakov</surname><given-names>Alexander I.</given-names></name><name xml:lang="ru"><surname>Арчаков</surname><given-names>Александр Иванович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Biol. Sci., Member of Russ. Acad. Sci., Professor, Scientific Leader</p></bio><bio xml:lang="ru"><p>д-р биол. наук, академик РАН, профессор, научный руководитель</p></bio><email>alexander.archakov@ibmc.msk.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Biomedical Chemistry</institution></aff><aff><institution xml:lang="ru">ФГБНУ «Научно-исследовательский институт биомедицинской химии имени В.Н. Ореховича»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Joint Institute for High Temperatures of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">ФГБУН Объединенный институт высоких температур Российской академии наук</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Rzhanov Institute of Semiconductor Physics, Siberian Branch of Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">ФГБУН Институт физики полупроводников им. А.В. Ржанова Сибирского отделения Российской академии наук</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">N.N. Blokhin National Medical Research Center of Oncology</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр онкологии им. Н.Н. Блохина» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff5"><aff><institution xml:lang="en">I.M. Sechenov First Moscow State Medical University (Sechenov University)</institution></aff><aff><institution xml:lang="ru">ФГАОУ ВО Первый Московский государственный медицинский университет имени И.М. Сеченова Минздрава России (Сеченовский Университет)</institution></aff></aff-alternatives><aff-alternatives id="aff6"><aff><institution xml:lang="en">N.I. Pirogov Russian National Research Medical University</institution></aff><aff><institution xml:lang="ru">ФГАОУ ВО «Российский национальный исследовательский медицинский университет им. Н.И. Пирогова» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2024-08-12" publication-format="electronic"><day>12</day><month>08</month><year>2024</year></pub-date><pub-date date-type="pub" iso-8601-date="2024-09-10" publication-format="electronic"><day>10</day><month>09</month><year>2024</year></pub-date><volume>52</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>120</fpage><lpage>131</lpage><history><date date-type="received" iso-8601-date="2024-02-16"><day>16</day><month>02</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-07-23"><day>23</day><month>07</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Ivanov Y.D., Nevedrova E.D., Vinogradova A.V., Goldaeva K.V., Pleshakova T.O., Galiullin R.A., Ableev A.N., Shumov I.D., Kozlov A.F., Popov V.P., Kushlinskii N.E., Stilidi I.S., Mamedli Z.Z., Enikeev D.V., Potoldykova N.V., Konev V.A., Kovalev O.B., Ziborov V.S., Grishin L.I., Dolgoborodov A.Y., Petrov O.F., Archakov A.I.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Иванов Ю.Д., Неведрова Е.Д., Виноградова А.В., Голдаева К.В., Плешакова Т.О., Галиуллин Р.А., Аблеев А.Н., Шумов И.Д., Козлов А.Ф., Попов В.П., Кушлинский Н.Е., Стилиди И.С., Мамедли З.З., Еникеев Д.В., Потолдыкова Н.В., Конев В.А., Ковалев О.Б., Зиборов В.С., Гришин Л.И., Долгобородов А.Ю., Петров О.Ф., Арчаков А.И.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Ivanov Y.D., Nevedrova E.D., Vinogradova A.V., Goldaeva K.V., Pleshakova T.O., Galiullin R.A., Ableev A.N., Shumov I.D., Kozlov A.F., Popov V.P., Kushlinskii N.E., Stilidi I.S., Mamedli Z.Z., Enikeev D.V., Potoldykova N.V., Konev V.A., Kovalev O.B., Ziborov V.S., Grishin L.I., Dolgoborodov A.Y., Petrov O.F., Archakov A.I.</copyright-holder><copyright-holder xml:lang="ru">Иванов Ю.Д., Неведрова Е.Д., Виноградова А.В., Голдаева К.В., Плешакова Т.О., Галиуллин Р.А., Аблеев А.Н., Шумов И.Д., Козлов А.Ф., Попов В.П., Кушлинский Н.Е., Стилиди И.С., Мамедли З.З., Еникеев Д.В., Потолдыкова Н.В., Конев В.А., Ковалев О.Б., Зиборов В.С., Гришин Л.И., Долгобородов А.Ю., Петров О.Ф., Арчаков А.И.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://almclinmed.ru/jour/article/view/17229">https://almclinmed.ru/jour/article/view/17229</self-uri><abstract xml:lang="en"><p><bold>Rationale:</bold> Colorectal cancer (CRC) is one of the most prevalent oncological diseases with high mortality. Invasive optical (endoscopic) colono- scopy has been recognized as a golden standard for the CRC diagnostics. A promising area is the development of non-invasive tools for CRC diagnosis with circular RNA (circRNA). One of the most sensitive non-invasive tools for detection of cancer RNA markers is considered to be the biosensor methods with the use of nanowire chips with oDNA probes (fragments of DNA oligonucleotides) immobilized on their surface. It has been previously shown that circRNA hsa_circ_0136666_CBC1, hsa_circ_0031263_CBC1, and hsa_circ_0072715_CBC1 are associated with CRC.</p> <p><bold>Aim:</bold> To determine the lower limit of concentration sensitivity of detection of CRC-associated circRNA with nanowire chips with immobilized oDNA probes, to demonstrate the usability of these chips for non-invasive detection of circRNA in plasma in the CRC diagnostics, and to establish the potential for the use of nanowire chips for the early CRC diagnosis.</p> <p><bold>Methods:</bold> To ensure biospecific binding of the circRNA hsa_circ_0136666_CBC1, hsa_circ_0031263_CBC1, and hsa_circ_0072715_CBC1 (the CRC markers), oDNA probes with the nucleotide sequences complementary to the target circRNA have been immobilized on the nanowire surface. At the study step 1, we detected the lower concentration limit for detection of the target molecules with the use of their analogues, i.e. synthetic model oDNA with the nucleotide sequences complementary to oDNA probes. At the study step 2, we used the nanowire chips with immobilized oDNA probes to detect the circRNA in plasma of the patients with confirmed CRC. Plasma samples from non-cancer patients were used as controls.</p> <p><bold>Results:</bold> The lower concentration limit for the detection of DNA analogues of the circRNA hsa_circ_0136666_CBC1, hsa_circ_0031263_CBC1, and hsa_circ_0072715_CBC1 with nanowire chips with oDNA probes was 10<sup>-16</sup> М. The analysis of total RNA isolated from plasma of the CRC patients showed a significant increase in the signal from the sensory elements of the nanowire chip. The analysis of plasma samples from the non-cancer patients, the nanowire signal changes were non-significant indicating the absence of detectable concentrations of the circRNA in plasma of the non-cancer patients.</p> <p><bold>Conclusion:</bold> We have identified the minimal detectable concentration of the circRNA hsa_circ_0136666_CBC1, hsa_circ_0031263_CBC1, and hsa_circ_0072715_CBC1, associated to the development of CRC, with nanowire chips with immobilized oDNA probes: it was 10<sup>-16</sup> М. The experiment showed the usability of such nanowire chips for non-invasive detection of the given circRNA markers in total RNA samples isolated from plasma of CRC patients.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование.</bold> Колоректальный рак (КРР) – одно из наиболее распространенных онкологических заболеваний с высокой смертностью. «Золотым стандартом» диагностики КРР признан инвазивный метод оптической (эндоскопической) колоноскопии. Перспективное направление – разработка неинвазивных методов диагностики КРР с использованием кольцевых РНК (кольцРНК). Одним из наиболее чувствительных неинвазивных методов детекции РНК-маркеров онкопатологии считается биосенсорный метод с использованием чипов с нанопроводами (НП-чипов) с иммобилизованными на их поверхности оДНК-зондами (фрагментами ДНК-олигонуклеотидов). Ранее показано, что с КРР ассоциированы кольцРНК hsa_circ_0136666_CBC1, hsa_circ_0031263_CBC1 и hsa_circ_0072715_CBC1.</p> <p><bold>Цели</bold> – определение нижнего предела концентрационной чувствительности детекции кольцРНК, ассоциированных с развитием КРР, при помощи НП-чипов с иммобилизованными оДНК-зондами; демонстрация применимости этих чипов для неинвазивной детекции кольцРНК в плазме крови с целью диагностики КРР; определение возможности использования НП-чипов для выявления ранних стадий КРР.</p> <p><bold>Материал и методы.</bold> Для обеспечения биоспецифического связывания кольцРНК hsa_circ_0136666_CBC1, hsa_circ_0031263_CBC1 и hsa_circ_0072715_CBC1 – маркеров КРР – на поверхность нанопроводов были иммобилизованы оДНК-зонды, нуклеотидные последовательности которых комплементарны целевым кольцРНК. На I этапе исследования определяли нижний концентрационный предел обнаружения целевых молекул, для чего использовали их аналоги – синтетические модельные оДНК с нуклеотидными последовательностями, комплементарными оДНК-зондам. На II этапе применяли НП-чипы с иммобилизованными оДНК-зондами для детекции кольцРНК в образцах плазмы крови больных с подтвержденным диагнозом КРР. В качестве контрольных использовали образцы от пациентов без онкопатологии.</p> <p><bold>Результаты.</bold> Нижний концентрационный предел обнаружения ДНК-аналогов кольцРНК hsa_circ_0136666_CBC1, hsa_circ_0031263_CBC1 и hsa_circ_0072715_CBC1 с помощью НП-чипов с оДНК-зондами составил 10<sup>-16</sup> М. При анализе образцов суммарной РНК, выделенной из плазмы крови пациентов с КРР, наблюдали существенный рост уровня сигнала от чувствительных элементов НП-чипа. При анализе образцов, выделенных из плазмы крови пациентов без онкологических заболеваний, изменение уровня сигнала от нанопроводов было незначительным, что свидетельствовало об отсутствии детектируемых концентраций целевых кольцРНК в плазме крови пациентов без онкопатологии.</p> <p><bold>Заключение.</bold> Установлена минимальная детектируемая концентрация кольцРНК hsa_circ_0136666_CBC1, hsa_circ_0031263_CBC1 и hsa_circ_0072715_CBC1, ассоциированных с развитием КРР, с помощью НП-чипов с иммобилизованными оДНК-зондами: она составила 10<sup>-16</sup> М. Экспериментально продемонстрирована применимость таких НП-чипов для неинвазивной детекции указанных кольцРНК-маркеров в образцах суммарной РНК, выделенной из плазмы крови больных КРР.</p></trans-abstract><kwd-group xml:lang="en"><kwd>colorectal cancer (CRC)</kwd><kwd>circular RNA</kwd><kwd>biosensory diagnostics</kwd><kwd>nanowire</kwd><kwd>DNA probe</kwd><kwd>human plasma</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>колоректальный рак (КРР)</kwd><kwd>кольцевая РНК</kwd><kwd>биосенсорная диагностика</kwd><kwd>нанопровод</kwd><kwd>ДНК-зонд</kwd><kwd>плазма крови человека</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Правительство РФ</institution></institution-wrap><institution-wrap><institution xml:lang="en">Government of RF</institution></institution-wrap></funding-source><award-id>122030100168-2</award-id></award-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Министерство науки и высшего образования РФ</institution></institution-wrap><institution-wrap><institution xml:lang="en">Ministry of Science and Higher Education of the Russian Federation</institution></institution-wrap></funding-source><award-id>075-00270-24-00</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Murphy CC, Zaki TA. 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