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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">Advances in Molecular Oncology</journal-id><journal-title-group><journal-title xml:lang="en">Advances in Molecular Oncology</journal-title><trans-title-group xml:lang="ru"><trans-title>Успехи молекулярной онкологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2313-805X</issn><issn publication-format="electronic">2413-3787</issn><publisher><publisher-name xml:lang="en">Publishing House ABV Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">834</article-id><article-id pub-id-type="doi">10.17650/2313-805X-2026-13-2-94-101</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>RESEARCH ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ЭКСПЕРИМЕНТАЛЬНЫЕ 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">Expression levels of laminin α5 and the endothelial marker CD146 in tumor tissues from patients with colorectal adenocarcinoma</article-title><trans-title-group xml:lang="ru"><trans-title>Уровни экспрессии ламинина α5 и маркера эндотелия CD146 в опухолевых тканях у пациентов с колоректальным раком</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7454-6653</contrib-id><name-alternatives><name xml:lang="en"><surname>Yuzhalin</surname><given-names>Arseniy E.</given-names></name><name xml:lang="ru"><surname>Южалин</surname><given-names>Арсений Евгеньевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Scientific Center for Transactional Medicine</p>
<p> </p></bio><bio xml:lang="ru"><p>Научный центр трансляционной медицины</p>
<p> </p></bio><email>yuzhalin.ae@talantiuspeh.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Arsentyev</surname><given-names>K. A.</given-names></name><name xml:lang="ru"><surname>Арсентьев</surname><given-names>К. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Scientific Center for Transactional Medicine</p>
<p> </p></bio><bio xml:lang="ru"><p>Научный центр трансляционной медицины</p>
<p> </p></bio><email>yuzhalin.ae@talantiuspeh.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-9487-3863</contrib-id><name-alternatives><name xml:lang="en"><surname>Savitskii</surname><given-names>S. A.</given-names></name><name xml:lang="ru"><surname>Савицкий</surname><given-names>С. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Scientific Center for Transactional Medicine</p>
<p> </p></bio><bio xml:lang="ru"><p>Научный центр трансляционной медицины</p>
<p> </p></bio><email>yuzhalin.ae@talantiuspeh.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Sirius University of Science and Technology</institution></aff><aff><institution xml:lang="ru">АНО ВО «Научно-технологический университет «Сириус»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-06-19" publication-format="electronic"><day>19</day><month>06</month><year>2026</year></pub-date><volume>13</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>94</fpage><lpage>101</lpage><history><date date-type="received" iso-8601-date="2025-12-15"><day>15</day><month>12</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2026-05-21"><day>21</day><month>05</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, ABV-Press</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, АБВ-пресс</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">ABV-Press</copyright-holder><copyright-holder xml:lang="ru">АБВ-пресс</copyright-holder><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://umo.abvpress.ru/jour/about/editorialPolicies</ali:license_ref></license></permissions><self-uri xlink:href="https://umo.abvpress.ru/jour/article/view/834">https://umo.abvpress.ru/jour/article/view/834</self-uri><abstract xml:lang="en"><p><bold>Introduction.</bold> Colorectal cancer (CRC) is one of the most common malignant neoplasms. Despite significant progress in treatment of this pathology in recent decades, 5-year overall survival of patients with colorectal cancer remains relatively low. The study presents results of comprehensive analysis of laminin α5 (LAMA5) and melanoma cell adhesion molecule (MCAM/CD146) expression levels in primary tumor tissues of patients with this disease. The study is important due to high incidence of CRC and insufficient knowledge of the role of extracellular matrix components in formation of tumor microenvironment.</p> <p><bold>Aim. </bold>To study expression levels of LAMA5 and MCAM (CD146) in tumor tissue of patients with colorectal cancer.</p> <p><bold>Materials and methods.</bold> Analysis of histological sections of human colorectal cancer samples (<italic>n</italic> = 8) after immunofluorescence staining with antibodies against LAMA5 and CD146 was performed. Qualitative evaluation of expression and colocalization was performed using the ImageJ software with subsequent statistical processing using GraphPad Prism.</p> <p><bold>Results.</bold> Analysis of colocalization per the Manders method showed moderate spatial overlapping of LAMA5 and CD146 signals. Spearman’s rank correlation test showed weak positive correlation between LAMA5 and CD146 expression levels, as well as moderate correlation between their fluorescence intensities. Results of bioinformatics analysis of RNA-seq data from the The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO) database confirmed the existence of statistically significant moderate positive correlation between <italic>MCAM</italic> and <italic>LAMA5 </italic>gene expression levels.</p> <p><bold>Conclusion.</bold> The obtained data show that in colorectal cancer LAMA5 is located along tumor vascular network and potentially affects its angiogenesis.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение.</bold> Колоректальный рак представляет собой один из самых распространенных видов злокачественных новообразований. Несмотря на значительный прогресс в лечении данной патологии в последние десятилетия, 5-летняя общая выживаемость пациентов с колоректальным раком остается довольно низкой. Актуальность исследования обусловлена высокой распространенностью колоректального рака и недостаточной изученностью роли компонентов внеклеточного матрикса в формировании опухолевого микроокружения. В исследовании представлены результаты комплексного анализа взаимосвязи уровня экспрессии ламинина α5 (LAMA5) и молекулы клеточной адгезии меланомы (MCAM/CD146) в первичных опухолевых тканях у пациентов с этим заболеванием.</p> <p><bold>Цель исследования</bold> – изучение взаимосвязи уровней экспрессии LAMA5 и MCAM (CD146) в опухолевой ткани у пациентов с колоректальным раком.</p> <p><bold>Материалы и методы.</bold> Проведен анализ гистологических срезов образцов колоректального рака человека (<italic>n</italic> = 8), которые были подвергнуты иммунофлуоресцентному окрашиванию антителами к LAMA5 и CD146. Количественная оценка экспрессии и колокализации проведена с помощью программы ImageJ с последующей статистической обработкой с использованием GraphPad Prism.</p> <p><bold>Результаты.</bold> Анализ колокализации по методу Мандерса выявил умеренное пространственное перекрытие сигналов LAMA5 и CD146. С помощью теста ранговой корреляции Спирмена установлена слабая положительная связь между уровнями экспрессии факторов LAMA5 и CD146, а также умеренная корреляция между интенсивностями их флуоресценции. Результаты биоинформатического анализа RNA-seq данных из «Атласа ракового генома» (The Cancer Genome Atlas, TCGA) и базы Gene Expression Omnibus (GEO) подтвердили наличие статистически значимой умеренной положительной корреляции между уровнями экспрессии генов <italic>MCAM</italic> и <italic>LAMA5</italic>.</p> <p><bold>Заключение.</bold> Полученные данные свидетельствуют о локализации LAMA5 вдоль сосудистой сети опухоли при колоректальном раке и потенциальном влиянии LAMA5 на ее ангиогенез.</p></trans-abstract><kwd-group xml:lang="en"><kwd>colorectal adenocarcinoma</kwd><kwd>laminin α5</kwd><kwd>LAMA5</kwd><kwd>melanoma cell adhesion molecule</kwd><kwd>MCAM</kwd><kwd>CD146</kwd><kwd>metastasis</kwd><kwd>tumor microenvironment</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>колоректальный рак</kwd><kwd>ламинин α5</kwd><kwd>LAMA5</kwd><kwd>молекула клеточной адгезии меланомы</kwd><kwd>MCAM</kwd><kwd>CD146</kwd><kwd>ангиогенез</kwd><kwd>микроокружение опухоли</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Saif M.W., Chu E. 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