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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">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">1655</article-id><article-id pub-id-type="doi">10.18786/2072-0505-2022-50-008</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>REVIEW ARTICLE</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОБЗОР</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">Macrophage cytotoxic activity and its role in the tumor pathogenesis</article-title><trans-title-group xml:lang="ru"><trans-title>Цитотоксическая активность макрофагов и ее роль в патогенезе опухолей</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6132-9924</contrib-id><name-alternatives><name xml:lang="en"><surname>Kovaleva</surname><given-names>Olga V.</given-names></name><name xml:lang="ru"><surname>Ковалева</surname><given-names>Ольга Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD (in Biol.), Senior Research Fellow, Laboratory of Regulation of Cellular and Viral Oncogenes, Research Institute of Carcinogenesis</p></bio><bio xml:lang="ru"><p>канд. биол. наук, ст. науч. сотр. лаборатории регуляции клеточных и вирусных онкогенов Научно-исследовательского института канцерогенеза</p></bio><email>ovkovaleva@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2312-5546</contrib-id><name-alternatives><name xml:lang="en"><surname>Podlesnaya</surname><given-names>Polina A.</given-names></name><name xml:lang="ru"><surname>Подлесная</surname><given-names>Полина Алексеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Research Assistant, Laboratory of Tumor Stromal Cells Biology, Research Institute of Carcinogenesis</p></bio><bio xml:lang="ru"><p>лаборант-исследователь лаборатории биологии стромальных клеток опухолей Научно-исследовательского института канцерогенеза</p></bio><email>polina.pod@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2137-1866</contrib-id><name-alternatives><name xml:lang="en"><surname>Gratchev</surname><given-names>Alexei N.</given-names></name><name xml:lang="ru"><surname>Грачев</surname><given-names>Алексей Николаевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Doctor of Biol. Sci., Head of Laboratory of Tumor Stromal Cells Biology</p></bio><bio xml:lang="ru"><p>д-р биол. наук, заведующий лабораторией биологии стромальных клеток опухолей Научно-исследовательского института канцерогенеза</p></bio><email>alexei.gratchev@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><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><pub-date date-type="preprint" iso-8601-date="2022-04-05" publication-format="electronic"><day>05</day><month>04</month><year>2022</year></pub-date><pub-date date-type="pub" iso-8601-date="2022-04-28" publication-format="electronic"><day>28</day><month>04</month><year>2022</year></pub-date><volume>50</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>13</fpage><lpage>20</lpage><history><date date-type="received" iso-8601-date="2022-03-21"><day>21</day><month>03</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2022-03-30"><day>30</day><month>03</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Kovaleva O.V., Podlesnaya P.A., Gratchev A.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Ковалева О.В., Подлесная П.А., Грачев А.Н.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Kovaleva O.V., Podlesnaya P.A., Gratchev A.N.</copyright-holder><copyright-holder xml:lang="ru">Ковалева О.В., Подлесная П.А., Грачев А.Н.</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/1655">https://almclinmed.ru/jour/article/view/1655</self-uri><abstract xml:lang="en"><p>Macrophages, natural killers and T cells play the central role in tumor cells destruction. The purpose of this review is to summarize the state-of-the-art perspectives of the interplay between tumor cells and tumor stroma leading both to the formation of a macrophage population incapable of effective antitumor activity and to the selection of tumor cells resistant to macrophage cytotoxicity.</p> <p>Macrophages are highly versatile cells that can both stimulate the inflammatory response (type 1 macrophages, M1) and suppress it (type 2 macrophages, M2). Tumor-associated macrophages (TAMs) are considered the main regulator of the antitumor immune response and usually have anti-inflammatory properties, that is, they belong to M2 type. Tumor cells are able to affect macrophages, "reprogramming" them to perform an immunosuppressive function. In addition, TAMs stimulate angiogenesis and remodelling of the extracellular matrix necessary for metastasis.</p> <p>Recently, more and more studies have been published describing a mixed TAMs phenotype with characteristics of both M2 and M1. M1 is characterized by production of pro-inflammatory cytokines, reactive oxygen species, bactericidal and cytotoxic activity. M1 can destroy tumor cells both directly and indirectly by attracting other cells. Despite the mechanisms of direct cytotoxic activity are quite variable, their effectiveness is largely dependent on the properties of a particular tumor. The cytotoxic activity of macrophages is a powerful factor that inhibits tumor initiation and progression. However, in some cases, it is not sufficient to control the tumor process. Activation of the cytotoxic activity of TAMs is one of the strategies to use macrophages for cancer treatment.</p> <p>Understanding the mechanisms of macrophage cytotoxic activity and specific patterns of its manifestation in a tumor environment is of critical importance for better effectiveness of existing cancer treatments and development of promising methods for tumor immunotherapy.</p></abstract><trans-abstract xml:lang="ru"><p>Центральную роль в уничтожении опухолевых клеток играют макрофаги, натуральные киллеры и Т-клетки. Цeль данного обзора – определить современные взгляды на механизмы взаимодействия опухолевых клеток и опухолевой стромы, приводящие как к формированию популяции макрофагов, неспособных к эффективной противоопухолевой активности, так и к отбору опухолевых клеток, устойчивых к цитотоксичности макрофагов.</p> <p>Макрофаги – весьма разносторонние клетки, способные не только стимулировать воспалительную реакцию (макрофаги 1-го типа – М1), но и подавлять ее (макрофаги 2-го типа – М2). Макрофаги, ассоциированные с опухолью (МАО), считаются основным регулятором противоопухолевого иммунного ответа и, как правило, обладают противовоспалительными свойствами, то есть относятся к типу М2. Опухолевые клетки способны влиять на макрофаги, «перепрограммируя» их на выполнение иммуносупрессорной функции. МАО также стимулируют ангиогенез и перестройку внеклеточного матрикса, необходимую для метастазирования.</p> <p>В последнее время появляется все больше работ, в которых описаны МАО смешанного фенотипа, обладающие характеристиками как М2, так и М1. Для М1 характерна продукция провоспалительных цитокинов, активных форм кислорода, бактерицидная и цитотоксическая активность. М1 могут уничтожать опухолевые клетки прямым или косвенным способом, путем привлечения других клеток. Несмотря на то что механизмы прямой цитотоксической активности достаточно вариативны, их эффективность в значительной степени зависит от свойств конкретной опухоли. Цитотоксическая активность макрофагов является мощным фактором, сдерживающим инициацию и прогрессию опухоли, однако в ряде случаев ее недостаточно для контроля опухолевого процесса. Активация цитотоксической активности МАО лежит в основе одной из стратегий использования макрофагов при лечении онкологических заболеваний.</p> <p>Понимание механизмов цитотоксической активности макрофагов и особенностей ее проявления в условиях опухолевого окружения критически важно для повышения эффективности существующих методов лечения онкологических заболеваний и разработки перспективных методов иммунотерапии опухолей.</p></trans-abstract><kwd-group xml:lang="en"><kwd>macrophage</kwd><kwd>immunity</kwd><kwd>cytokine</kwd><kwd>tumor</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>макрофаг</kwd><kwd>иммунитет</kwd><kwd>цитокин</kwd><kwd>опухоль</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский фонд фундаментальных исследований</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Foundation for Basic Research</institution></institution-wrap></funding-source><award-id>№ 20-015-00479</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Moiseenko VM, editor. 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