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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="review-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Molekulyarnaya Meditsina (Molecular medicine)</journal-id><journal-title-group><journal-title xml:lang="en">Molekulyarnaya Meditsina (Molecular medicine)</journal-title><trans-title-group xml:lang="ru"><trans-title>Молекулярная медицина</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1728-2918</issn><issn publication-format="electronic">2499-9490</issn><publisher><publisher-name xml:lang="en">Russkiy Vrach Publishing House</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">340813</article-id><article-id pub-id-type="doi">10.29296/24999490-2023-02-01</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Reviews</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Обзоры</subject></subj-group><subj-group subj-group-type="article-type"><subject>Review Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Molecular mechanisms of tumor drug resistance</article-title><trans-title-group xml:lang="ru"><trans-title>Молекулярные механизмы лекарственной устойчивости опухолей</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1909-222X</contrib-id><name-alternatives><name xml:lang="en"><surname>Okladnikova</surname><given-names>Evgenja V.</given-names></name><name xml:lang="ru"><surname>Окладникова</surname><given-names>Евгения Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>associated professor of Pathophysiology Department, candidate of medical sciences</p></bio><bio xml:lang="ru"><p>доцент кафедры патологической физиологии им. В.В. Иванова, кандидат медицинских наук</p></bio><email>farmasis@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7085-6304</contrib-id><name-alternatives><name xml:lang="en"><surname>Zinchenko</surname><given-names>Ivan S.</given-names></name><name xml:lang="ru"><surname>Зинченко</surname><given-names>Иван Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD student of the Pathophysiology Department</p></bio><bio xml:lang="ru"><p>аспирант кафедры патологической физиологии им. В.В. Иванова</p></bio><email>zinchenko.ivan.003@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8142-4283</contrib-id><name-alternatives><name xml:lang="en"><surname>Ruksha</surname><given-names>Tatiana G.</given-names></name><name xml:lang="ru"><surname>Рукша</surname><given-names>Татьяна Геннадьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Head of the Pathophysiology Department, doctor of medical sciences</p></bio><bio xml:lang="ru"><p>заведующая кафедрой патологической физиологии им. В.В. Иванова, доктор медицинских наук, профессор</p></bio><email>tatyana_ruksha@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Professor V. F. Voino-Yasenetsky Krasnoyarsk State Medical University</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Красноярский государственный медицинский университет им. проф. В.Ф. Войно-Ясенецкого» Министерства здравоохранения Российской Федерации</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-04-21" publication-format="electronic"><day>21</day><month>04</month><year>2023</year></pub-date><volume>21</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>3</fpage><lpage>10</lpage><history><date date-type="received" iso-8601-date="2023-04-18"><day>18</day><month>04</month><year>2023</year></date><date date-type="accepted" iso-8601-date="2023-04-18"><day>18</day><month>04</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Russkiy Vrach Publishing House</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, ИД "Русский врач"</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Russkiy Vrach Publishing House</copyright-holder><copyright-holder xml:lang="ru">ИД "Русский врач"</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2028-04-21"/></permissions><self-uri xlink:href="https://journals.eco-vector.com/1728-2918/article/view/340813">https://journals.eco-vector.com/1728-2918/article/view/340813</self-uri><abstract xml:lang="en"><p><italic><bold>Introduction. </bold></italic>Overcoming resistance to anticancer drugs in the treatment of malignant neoplasms is an urgent problem of recent decades. Unfortunately, there is no single mechanism for the development of resistance. Alterations that occur in a normal cell during its transformation into a malignant one can lead to the development of primary resistance whereas secondary resistance occurs already as a result of treatment with anticancer drugs.</p> <p><bold><italic>The purpose of the review.</italic> </bold>To summarize current data on the mechanisms of a drug resistance development to chemotherapeutic agents in order to select and implement possible ways to overcome it.</p> <p><italic><bold>Material and methods. </bold></italic>The materials were the results of research on this topic over the past 15 years, from 2007 to 2022. The publications included in the databases PubMed, Medline, EMBASE were analyzed.</p> <p><italic><bold>Results. </bold></italic>Analysis of the research results showed that among the mechanisms of a drug resistance development, there are changes in the activity of energy and metabolic processes, structural and/or functional alterations in the expression and function of cancer-related genes and proteins. All together it can lead to a disruption in the flow of the drug into the cancer cell, its active removal from the cell and the patient’s body, an insufficient, short-lived or perverted reaction of the malignant tumor to the drug. At the same time, the heterogeneity of primary tumor cells and metastatic cells leads to multiple mechanisms of drug resistance development in the same patient or in different patients with the same histological type of tumor. Overcoming or blocking some mechanisms of resistance can lead to the development of others.</p> <p><italic><bold>Conclusion.</bold> </italic>The study of the cancer cell drug resistance will help to optimize pharmacotherapy and improve the quality and life expectancy of patients suffering from cancer.</p></abstract><trans-abstract xml:lang="ru"><p><italic><bold>Введение</bold>.</italic> Преодоление устойчивости к противоопухолевым препаратам при лечении злокачественных новообразований является актуальной проблемой последних десятилетий. К сожалению, нет какого-то единого механизма развития резистентности. Изменения, возникающие в здоровой клетке при трансформации ее в злокачественную, могут приводить к развитию первичной резистентности, а вторичная резистентность происходит уже как результат лечения химиотерапевтическими препаратами.</p> <p><italic><bold>Цель обзора.</bold></italic> Обобщить современные данные о механизмах развития лекарственной устойчивости к химиотерапевтическим средствам при лечении злокачественных новообразований с целью выбора и реализации возможных путей ее преодоления.</p> <p><italic><bold>Материал и методы. </bold></italic>Материалами послужили результаты исследований по данной теме за последние 15 лет, с 2007 по 2022 годы. Анализировались публикации, входящие в базы данных PubMed, Medline, EMBASE.</p> <p><italic><bold>Результаты. </bold></italic>Анализ результатов исследований показал, что среди механизмов развития лекарственной устойчивости выделяют изменения активности энергетических и метаболических процессов, структурные и(или) функциональные изменения экспрессии и функции генов и белков опухолевой клетки. Все это может приводить к нарушению поступления лекарственного вещества в клетку опухоли, его активному выведению из клетки и организма пациента, недостаточной, непродолжительной или извращенной реакции злокачественной опухоли на лекарственный препарат. При этом гетерогенность клеток опухоли и клеток ее метастазов приводит к возможности существования одновременно нескольких механизмов лекарственной резистентности у одного и того же пациента или у разных пациентов с одним гистологическим типом опухоли. Преодоление или устранение одних механизмов резистентности может приводить к развитию других.</p> <p><italic><bold>Заключение. </bold></italic>Изучение механизмов развития резистентности к противоопухолевым препаратам позволит оптимизировать фармакотерапию и улучшить качество и продолжительность жизни пациентов, страдающих онкологическими заболеваниями.</p></trans-abstract><kwd-group xml:lang="en"><kwd>drug resistance</kwd><kwd>аntitumor drug resistance</kwd><kwd>pathogenesis of drug resistance</kwd><kwd>chemotherapy</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>лекарственная устойчивость</kwd><kwd>резистентность к противоопухолевым препаратам</kwd><kwd>патогенез лекарственной резистентности</kwd><kwd>химиотерапия</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Wajapeyee N., Gupta R. Epigenetic Alterations and Mechanisms That Drive Resistance to Targeted Cancer Therapies. 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