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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">ssmu</journal-id><journal-title-group><journal-title xml:lang="ru">Бюллетень сибирской медицины</journal-title><trans-title-group xml:lang="en"><trans-title>Bulletin of Siberian Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1682-0363</issn><issn pub-type="epub">1819-3684</issn><publisher><publisher-name>Siberian State Medical University, the Ministry of Healthcare of the Russian Federation</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.20538/1682-0363-2024-4-5-14</article-id><article-id custom-type="elpub" pub-id-type="custom">ssmu-5861</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>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL PAPERS</subject></subj-group></article-categories><title-group><article-title>Динамические изменения целостности РНК, экспрессии генов и патоморфология тканей экспериментальных мышей в посмертном периоде</article-title><trans-title-group xml:lang="en"><trans-title>Dynamic changes in RNA integrity, gene expression, and tissue pathomorphology of experimental mice in the postmortem period</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6714-1938</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Буйко</surname><given-names>Е. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Buyko</surname><given-names>E. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Буйко Евгений Евгеньевич – мл. науч. сотрудник, Центральная научно-исследовательская лаборатория, </p><p>634050, г. Томск, Московский тракт, 2</p></bio><bio xml:lang="en"><p>2, Moscow Trakt, Tomsk, 634050</p></bio><email xlink:type="simple">buykoevgen@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4273-8228</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Перина</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Perina</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Перина Екатерина Александровна – мл. науч. сотрудник, Центр доклинических исследований, Центральная научно-исследовательская лаборатория, </p><p>634050, г. Томск, Московский тракт, 2</p></bio><bio xml:lang="en"><p>2, Moscow Trakt, Tomsk, 634050</p></bio><email xlink:type="simple">catherineperina@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9780-0770</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Васильченко</surname><given-names>Д. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vasilchenko</surname><given-names>D. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Васильченко Дмитрий Владимирович – канд. мед. наук, вед. науч. сотрудник, Центральная научно-исследовательская лаборатория, </p><p>634050, г. Томск, Московский тракт, 2</p></bio><bio xml:lang="en"><p>2, Moscow Trakt, Tomsk, 634050</p></bio><email xlink:type="simple">vasilchenkodmitry1991@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2716-3075</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Цыденова</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Tsydenova</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Цыденова Ирина Александровна – лаборант, Центр доклинических исследований, Центральная научно-исследовательская лаборатория,</p><p>634050, г. Томск, Московский тракт, 2</p></bio><bio xml:lang="en"><p>2, Moscow Trakt, Tomsk, 634050</p></bio><email xlink:type="simple">tsydenova422@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1776-4149</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хмелевская</surname><given-names>Е. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Khmelevskaya</surname><given-names>E. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Хмелевская Екатерина Сергеевна – канд. мед. наук, науч. сотрудник, Центр биологических исследований и биоинженерии, Центральная научно-исследовательская лаборатория, </p><p>634050, г. Томск, Московский тракт, 2</p></bio><bio xml:lang="en"><p>2, Moscow Trakt, Tomsk, 634050</p></bio><email xlink:type="simple">kat.hmelevsk@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3837-1179</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Уфандеев</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Ufandeev</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Уфандеев Александр Анатольевич – мл. науч. сотрудник, Центр доклинических исследований, Центральная научно-исследовательская лаборатория, </p><p>634050, г. Томск, Московский тракт, 2</p></bio><bio xml:lang="en"><p>2, Moscow Trakt, Tomsk, 634050</p></bio><email xlink:type="simple">ufandeev@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8761-7537</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кайдаш</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kaidash</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кайдаш Ольга Александровна – ст. науч. сотрудник, Центр доклинических исследований, Центральная научно-исследовательская лаборатория, </p><p>634050, г. Томск, Московский тракт, 2</p></bio><bio xml:lang="en"><p>2, Moscow Trakt, Tomsk, 634050</p></bio><email xlink:type="simple">kaidash_2011@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3326-729X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Иванов</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ivanov</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иванов Владимир Владимирович – канд. биол. наук, доцент, руководитель Центра доклинических исследований, Центральная научно-исследовательская лаборатория,</p><p>634050, г. Томск, Московский тракт, 2</p></bio><bio xml:lang="en"><p>2, Moscow Trakt, Tomsk, 634050</p></bio><email xlink:type="simple">ivanovvv1953@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1195-4008</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Вторушин</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Vtorushin</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Вторушин Сергей Владимирович – д-р мед. наук, профессор, профессор кафедры патологической анатомии, </p><p>634050, г. Томск, Московский тракт, 2</p></bio><bio xml:lang="en"><p>2, Moscow Trakt, Tomsk, 634050</p></bio><email xlink:type="simple">vtorushin.sv@ssmu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6104-4782</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Удут</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Udut</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Удут Елена Владимировна – д-р мед. наук, профессор РАН, зав. Центральной научно-исследовательской лабораторией,</p><p>634050, г. Томск, Московский тракт, 2</p></bio><bio xml:lang="en"><p>2, Moscow Trakt, Tomsk, 634050</p></bio><email xlink:type="simple">udut.ev@ssmu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Сибирский государственный медицинский университет (СибГМУ)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Siberian State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>18</day><month>01</month><year>2025</year></pub-date><volume>23</volume><issue>4</issue><fpage>5</fpage><lpage>14</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Буйко Е.Е., Перина Е.А., Васильченко Д.В., Цыденова И.А., Хмелевская Е.С., Уфандеев А.А., Кайдаш О.А., Иванов В.В., Вторушин С.В., Удут Е.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Буйко Е.Е., Перина Е.А., Васильченко Д.В., Цыденова И.А., Хмелевская Е.С., Уфандеев А.А., Кайдаш О.А., Иванов В.В., Вторушин С.В., Удут Е.В.</copyright-holder><copyright-holder xml:lang="en">Buyko E.E., Perina E.A., Vasilchenko D.V., Tsydenova I.A., Khmelevskaya E.S., Ufandeev A.A., Kaidash O.A., Ivanov V.V., Vtorushin S.V., Udut E.V.</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://bulletin.ssmu.ru/jour/article/view/5861">https://bulletin.ssmu.ru/jour/article/view/5861</self-uri><abstract><sec><title>Цель</title><p>Цель. Изучение закономерности морфологических изменений, величины целостности РНК и паттернов экспрессии генов тканей мышей, отобранных при аутопсии в контролируемых условиях.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Мышей линии Balb/c подвергали эвтаназии с последующей некропсией через 0, 3, 12, 24, 48, 72 ч. Первые 3 ч после эвтаназии мыши находились при комнатной температуре, а затем были перемещены в холодильник (4 °С). Общую РНК выделяли из образцов тканей почек, печени, головного мозга, целостность образцов РНК измеряли при помощи капиллярного электрофореза с расчетом значений RQN (RNA Quality Number). Уровень экспрессии генов домашнего хозяйства Actb, Epas1, Rps18 оценивали при помощи обратно-транскриптазной количественной полимеразной цепной реакции в режиме реального времени (RT-qPCR) с оригинальными праймерами и зондами по технологии TaqMan. Гистологическое исследование выполнено по стандартной методике.</p></sec><sec><title>Результаты</title><p>Результаты. Выделенная из тканей почек мышей РНК подвержена деградации в большей степени с увеличением посмертного интервала, чем РНК печени. При этом обнаружена отрицательная линейная зависимость между показателем RQN и длительностью посмертного интервала для образцов печени и почек животных. В то же время образцы РНК головного мозга не демонстрировали существенного изменения показателя RQN во всех временных точках. В тканях почек и печени мышей значительно снижается экспрессия генов Epas1 и Rps18. Однако величина экспрессии генов Epas1 и Rps18 в головном мозге животных остается стабильной во всех временных точках и не демонстрирует значительного снижения через 72 ч после проведения эвтаназии. При гистологическом исследовании не обнаружено явных морфологических изменений, что не исключает наличия ультраструктурных патологических изменений.</p></sec><sec><title>Заключение</title><p>Заключение. Величина целостности РНК (RQN) в аутопсийных тканях является важным предиктором качества образца для молекулярно-биологических исследований, включая анализ экспрессии генов.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Aim</title><p>Aim. To examine the pattern of morphological changes, RNA quality number, and gene expression in mouse tissues sampled at autopsy under controlled experimental conditions.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. Balb/c mice were euthanized and subsequently subjected to necropsy at 0, 3, 12, 24, 48, and 72 hours of the postmortem period. During the first three hours following euthanasia, the mice were maintained at room temperature, after which they were transferred to a refrigerator (4 º С). Total RNA was extracted from tissue samples taken from the kidney, liver, and brain; the integrity of the RNA samples was assessed by capillary electrophoresis, and the RNA quality number (RQN) was calculated. The expression levels of Actb, Epas1, and Rps18 housekeeping genes were evaluated by real-time quantitative reverse transcription polymerase chain reaction (RT-qPCR) with original primers and probes using the TaqMan assay. The histologic examination was performed according to standard techniques.</p></sec><sec><title>Results</title><p>Results. Degradation of RNA extracted from mouse kidney tissues appeared to be greater than that of RNA taken from the liver. In the meantime, a negative linear correlation was observed between RQN and the duration of the postmortem interval for liver and kidney samples. In contrast, no significant changes in the RQN score were observed for brain RNA samples at any of the time points. The expression of the Epas1 and Rps18 genes was significantly decreased in mouse kidney and liver tissues. However, the level of Epas1 and Rps18 gene expression in the brain remained stable at all time points and did not exhibit a significant decrease at 72 hours after euthanasia. No obvious morphological changes were detected by the histologic examination, which does not exclude the presence of ultrastructural pathological changes.</p></sec><sec><title>Conclusion</title><p>Conclusion. RQN in autopsy tissues serves as a crucial predictor of sample quality for molecular biology studies, including gene expression analysis.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>посмертный интервал</kwd><kwd>аутопсия</kwd><kwd>целостность РНК</kwd><kwd>ПЦР</kwd><kwd>экспрессия генов</kwd></kwd-group><kwd-group xml:lang="en"><kwd>postmortem interval</kwd><kwd>autopsy</kwd><kwd>RNA integrity</kwd><kwd>PCR</kwd><kwd>gene expression</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке Российского научного фонда в рамках научного проекта № 23-69-10035 «Новые подходы валидации результатов молекулярного профилирования патологических изменений тканей на основе данных молекулярного профилирования, полученных при исследовании биопсии и аутопсии».</funding-statement><funding-statement xml:lang="en">The study was supported by the Russian Science Foundation project No. 23-69-10035 “New approaches to validating the results of molecular profiling of pathological tissue changes based on molecular profiling data obtained from biopsy and autopsy studies”.</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">Mackenzie I.R., Neumann M. 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