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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">ivm</journal-id><journal-title-group><journal-title xml:lang="ru">Международный вестник ветеринарии</journal-title><trans-title-group xml:lang="en"><trans-title>International Journal of Veterinary Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2072-2419</issn><publisher><publisher-name>SpbGUVM Publishing House</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.52419/issn2072-2419.2025.4.650</article-id><article-id custom-type="elpub" pub-id-type="custom">ivm-1934</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>НЕЗАРАЗНЫЕ БОЛЕЗНИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>NON-COMMUNICABLE DISEASE</subject></subj-group></article-categories><title-group><article-title>Поисковое исследование применения ингибиторов р-гликопротеина при терапии у животных с онкологическими патологиями</article-title><trans-title-group xml:lang="en"><trans-title>Exploratory study of the use of p-glycoprotein inhibitors in therapy in animals with oncological pathologies</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4726-6204</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Назарова</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nazarova</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. ветеринар. наук, доцент каф. общей, частной и оперативной хирургии</p></bio><bio xml:lang="en"><p>Candidate of Veterinary Sciences, Associate Professor of the Department of surgery </p></bio><email xlink:type="simple">anna.v.nazarova@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/0000-0003-0149-9360</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Семенов</surname><given-names>Б. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Semenov</surname><given-names>B. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р ветеринар. наук, проф. каф. общей, частной и оперативной хирургии</p></bio><bio xml:lang="en"><p>Doctor of Veterinary Sciences, Professor</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8981-0696</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кузнецова</surname><given-names>Т. Ш.</given-names></name><name name-style="western" xml:lang="en"><surname>Kuznetsova</surname><given-names>T. Sh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. биол. наук, доц. генетических и репродуктивных биотехнологий</p></bio><bio xml:lang="en"><p>Candidate of Biological Sciences, Associate Professor</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Санкт-Петербургский государственный университет ветеринарной медицины»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>St. Petersburg State University of Veterinary Medicine</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>30</day><month>12</month><year>2025</year></pub-date><volume>0</volume><issue>4</issue><fpage>650</fpage><lpage>660</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Назарова А.В., Семенов Б.С., Кузнецова Т.Ш., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Назарова А.В., Семенов Б.С., Кузнецова Т.Ш.</copyright-holder><copyright-holder xml:lang="en">Nazarova A.V., Semenov B.S., Kuznetsova T.S.</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://vetjournal.spbguvm.ru/jour/article/view/1934">https://vetjournal.spbguvm.ru/jour/article/view/1934</self-uri><abstract><p>АВС-транспортёры — группа белков, функцией которых является транспорт питательных веществ внутрь клетки и выделение эндогенных и экзогенных молекул из клетки. Протоонкоген ABCB1(MDR1) кодирует мембран ассоциированный белок под названием P-гликопротеин. P-гликопротеин отвечает за выделение из клетки большого количества ксенобиотиков и регулирует их всасывание в кишечнике. Ген ABCB1 и кодируемый им Р-гликопротеин отвечает также за формирование мультилекарственной устойчивости (МЛУ). Дисфункция Р-гликопротеина может возникнуть как вследствие неопластического процесса, так и в результате взаимодействия лекарств у любой собаки или кошки. Это делает актуальным исследование механизмов формирования МЛУ у животных, проходящих противораковую терапию, а также поиск эффективных способов профилактики формирования МЛУ и её снижения. Одним из вариантов, позволяющих повысить эффективность противоопухолевой терапии и улучшить выживаемость животных с онкологическими заболеваниями, в том числе при рецидивах, метастазах и нерезектабельных опухолях, является включение в протоколы лечения ингибиторов АВС-транспортёров. Одним из веществ, которые рассматриваются в качестве ингибиторов АБС-транспортёров, является кверцетин — природное биохимическое вещество группы флавоноидов. В период с 2024 по 2025 год с целью оценить целесообразность дальнейшего изучения применения дигидрокверцетина в качестве ингибитора ABCB1 (MDR1) белка-транспортёра у животных, проходящих противораковую терапию, нами было проведено поисковое исследование. Животным, включённым в исследование, проводилась терапия препаратами тоцераниб, иматиниб, сорафениб, лапатиниб и траметиниб. В качестве адъюванта применялось биологически активное вещество (БАВ) дигидрокверцетин в дозе 2–10 мг/кг/24 часа перорально. Результаты нашего поискового исследования подтверждают необходимость проведения клинических исследований применения дигидрокверцетина в качестве ингибитора ABCB1 (MDR1) белка-транспортёра у животных, проходящих противораковую терапию.</p></abstract><trans-abstract xml:lang="en"><p>ATP binding cassette (ABC) transporters are a group of proteins whose function is to transport nutrients into the cell and excretion endogenous and exogenous molecules from the cell. The ABCB1(MDR1) gene encodes P-glycoprotein (P-gp), a cellular membrane pump. P-glycoprotein mediated drug transport is present in more places (including the blood brain barrier). P-gp also regulates intestinal absorption. The ABCB1 gene and the P-glycoprotein encoded by it are also responsible for the formation of multidrug resistance (MDR). P-glycoprotein dysfunction can occur both as resulting from neoplasia and as resulting from drug-drug interactions in dog or cat. This makes it relevant to study the mechanisms of MDR formation in animals undergoing cancer therapy, as well as to find effective ways to prevent and reduce MDR. One of the options to increase the effectiveness of cancer therapy and improve the survival of animals, including relapses, metastases and unresectable tumors, is the inclusion of ABC transporter inhibitors in treatment protocols. One of the substances that are considered as inhibitors of ABS transporters is quercetin— a natural biochemical substance of the flavonoid group. In the period from 2024 to 2025, in order to assess the feasibility of further studying the use of quercetin as an inhibitor of the multidrug efflux transporter ABCB1 (MDR1) in animals undergoing cancer therapy, we conducted an exploratory study. The animals included in the study were treated with toceranib, imatinib, sorafenib, lapatinib and trametinib. The biologically active substance dihydroquercetin was used as an adjuvant at a dose of 2-10 mg/kg/24 hours per os. The results of our exploration study confirm the need for clinical studies of the use of quercetin as ABCB1 (MDR1) transporter inhibitor in animals undergoing cancer therapy.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ABC-транспортёры</kwd><kwd>множественная лекарственная устойчивость</kwd><kwd>химиотерапия</kwd><kwd>таргетная терапия</kwd><kwd>ABCB1</kwd><kwd>MDR1</kwd><kwd>Р-гликопротеин</kwd><kwd>кверцетин</kwd><kwd>собаки</kwd><kwd>кошки</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ABC-transporters</kwd><kwd>multidrug resistance</kwd><kwd>chemoresistance</kwd><kwd>target therapy</kwd><kwd>ABCB1</kwd><kwd>MDR1</kwd><kwd>P-glycoprotein</kwd><kwd>quercetin</kwd><kwd>dog</kwd><kwd>cat</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Бойчук С.В., Ивойлова Т.В. Роль ABC-транспортеров в поддержании гомеостаза, патогенезе и терапии онкологических заболеваний. 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