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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">10.20538/1682-0363-2023-1-88-95</article-id><article-id custom-type="elpub" pub-id-type="custom">ssmu-5138</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>Субпопуляции В-лимфоцитов у больных раком молочной железы в зависимости от статуса PD-L1</article-title><trans-title-group xml:lang="en"><trans-title>Subpopulations of B lymphocytes in patients with breast cancer depending on the PD-L1 status</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2061-8417</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Таширева</surname><given-names>Л. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Tashireva</surname><given-names>L. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Таширева Любовь Александровна – кандидат медицинских наук, ст. науч. сотрудник, отделение общей и молекулярной патологии</p><p>634009, г. Томск, пер. Кооперативный, 5</p></bio><bio xml:lang="en"><p>5, Kooperativny Str., Tomsk, 634009</p></bio><email xlink:type="simple">tashireva@oncology.tomsk.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/0000-0003-2106-3513</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Калинчук</surname><given-names>А. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Kalinchuk</surname><given-names>A. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Калинчук Анна Юрьевна – лаборант-исследователь, отделение общей и молекулярной патологии</p><p>634009, г. Томск, пер. Кооперативный, 5</p></bio><bio xml:lang="en"><p>5, Kooperativny Str., Tomsk, 634009</p></bio><email xlink:type="simple">anya98.tomsk@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/0000-0002-7283-0092</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Геращенко</surname><given-names>Т. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Gerashchenko</surname><given-names>T. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Геращенко Татьяна Сергеевна – кандидат медицинских наук, науч. сотрудник, лаборатория опухолевой прогрессии</p><p>634009, г. Томск, пер. Кооперативный, 5</p></bio><bio xml:lang="en"><p>5, Kooperativny Str., Tomsk, 634009</p></bio><email xlink:type="simple">t_gerashenko@list.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/0000-0002-0301-8455</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Савельева</surname><given-names>О. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Savelyeva</surname><given-names>O. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Савельева Ольга Евгеньевна – доктор медицинских наук, вед. науч. сотрудник, отделение общей и молекулярной патологии</p><p>634009, г. Томск, пер. Кооперативный, 5</p></bio><bio xml:lang="en"><p>5, Kooperativny Str., Tomsk, 634009</p></bio><email xlink:type="simple">olga_chechina@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/0000-0002-7633-9620</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Перельмутер</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Perelmuter</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Перельмутер Владимир Михайлович – доктор медицинских наук, профессор, заслуженный деятель науки РФ, гл. науч. сотрудник, отделение общей и молекулярной патологии</p><p>634009, г. Томск, пер. Кооперативный, 5</p></bio><bio xml:lang="en"><p>5, Kooperativny Str., Tomsk, 634009</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Научно-исследовательский институт онкологии, Томский национальный исследовательский медицинский центр Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Cancer Research Institute, Tomsk National Research Medical Center of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>20</day><month>04</month><year>2023</year></pub-date><volume>22</volume><issue>1</issue><fpage>88</fpage><lpage>95</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Таширева Л.А., Калинчук А.Ю., Геращенко Т.С., Савельева О.Е., Перельмутер В.М., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Таширева Л.А., Калинчук А.Ю., Геращенко Т.С., Савельева О.Е., Перельмутер В.М.</copyright-holder><copyright-holder xml:lang="en">Tashireva L.A., Kalinchuk A.Y., Gerashchenko T.S., Savelyeva O.E., Perelmuter V.M.</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/5138">https://bulletin.ssmu.ru/jour/article/view/5138</self-uri><abstract><sec><title>Цель</title><p>Цель. Изучить, насколько функциональные потенции и степень зрелости В-лимфоцитов сопряжены со статусом экспрессии PD-L1 опухоли у больных раком молочной железы.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. В исследование вошли 37 пациентов с морфологически верифицированным диагнозом инвазивной карциномы молочной железы неспецифического типа (ИКНТ). Статус PD-L1 определялся иммуногистохимически тестом Ventana SP142 (Roche, США). С использованием методов мультиплексной проточной цитофлуориметрии и высокопроизводительного секвенирования микроокружения были определены субпопуляции В-лимфоцитов, их профиль экспрессии CD27 и PD1 с учетом статуса PD-L1 опухоли.</p></sec><sec><title>Результаты</title><p>Результаты. В микроокружении опухоли у пациентов независимо от статуса PD-L1 определяются экспрессионные сигнатуры пяти субпопуляций лимфоцитов. Однако у больных с позитивным статусом в микроокружении первичной опухоли уровни В-лимфоцитов и В-лимфоцитов с переключаемым классом Ig выше по сравнению с пациентами, имеющими негативный статус PD-L1. Оценка количества различных субпопуляций В-лимфоцитов методом проточной цитофлуориметрии показала, что у больных с PDL1-позитивным статусом опухоли в микроокружении преобладают PD-1-позитивные В-лимфоциты независимо от степени их зрелости.</p></sec><sec><title>Заключение</title><p>Заключение. Результаты исследования показывают преобладание зрелых коммитированных В-лимфоцитов и В-лимфоцитов памяти, способных к синтезу иммуноглобулинов разных классов и цитокинов, относящихся к спектру иммуновоспалительных реакций Th2 типа в микроокружении PD-L1-позитивных опухолей. Это может являться неблагоприятным признаком при планировании иммунотерапии анти-PD-L1 ингибиторами, поскольку с высокой вероятностью ее применение может активировать клетки микроокружения с проопухолевыми потенциями, что в конечном итоге будет способствовать прогрессии карцином.</p></sec><sec><title> </title><p> </p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Aim</title><p>Aim. To study the association between the functional potency and degree of maturity of B lymphocytes and PD-L1 expression in breast cancer patients.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The study included 37 patients with the morphologically verified diagnosis of invasive breast cancer of no special type (IBC NST). The PD-L1 status was determined immunohistochemically using the Ventana SP142 assay (Roche, USA). Using the multiplex flow cytometry-based assay and high-throughput sequencing of the tumor microenvironment, subpopulations of B lymphocytes and their CD27 and PD1 expression profiles were determined, taking into account the PD-L1 status.</p></sec><sec><title>Results</title><p>Results. In the tumor microenvironment, regardless of the PD-L1 status, expression signatures of five lymphocyte subpopulations were determined. However, in PD-L1-positive patients, the levels of B lymphocytes and immunoglobulin class-switched B lymphocytes were higher compared with PD-L1-negative patients. Evaluation of the number of different B lymphocyte subpopulations by flow cytometry showed that PD-1-positive B lymphocytes predominated in the tumor microenvironment in PD-L1-positive patients, regardless of the degree of lymphocyte maturity.</p></sec><sec><title>Conclusion</title><p>Conclusion. The results of the study showed predominance of mature committed B lymphocytes and memory B lymphocytes capable of synthesizing immunoglobulins of different classes and Th2 cytokines involved in type 2 immune response in PD-L-positive tumor microenvironment. It suggests that immunotherapy with PD-L1 inhibitors is highly likely to activate cells with protumor potential and can ultimately contribute to breast cancer progression.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>рак молочной железы</kwd><kwd>микроокружение</kwd><kwd>В-лимфоциты</kwd><kwd>PD-L1</kwd></kwd-group><kwd-group xml:lang="en"><kwd>breast cancer</kwd><kwd>tumor microenvironment</kwd><kwd>B lymphocytes</kwd><kwd>PD-L1</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке РНФ (проект № 20-75-10033).</funding-statement><funding-statement xml:lang="en">The study was supported by the Russian Science Foundation (project No. 20-75-10033).</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">Haslam A., Prasad V. 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