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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">Kazan medical journal</journal-id><journal-title-group><journal-title xml:lang="en">Kazan medical journal</journal-title><trans-title-group xml:lang="ru"><trans-title>Казанский медицинский журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0368-4814</issn><issn publication-format="electronic">2587-9359</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">90127</article-id><article-id pub-id-type="doi">10.17816/KMJ2022-780</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Experimental medicine</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Экспериментальная медицина</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">Inhibitory effect of DL-butionine sulfoximine on P-glycoprotein activity in vitro</article-title><trans-title-group xml:lang="ru"><trans-title>Ингибирующее действие DL-бутионинсульфоксимина на активность Р-гликопротеина in vitro</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0427-0967</contrib-id><name-alternatives><name xml:lang="en"><surname>Abalenikhina</surname><given-names>Yulia V.</given-names></name><name xml:lang="ru"><surname>Абаленихина</surname><given-names>Юлия Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), Assoc. Prof., Depart. of Biological Chemistry</p></bio><bio xml:lang="ru"><p>канд. биол. наук, доц., каф. биологической химии с курсом КЛД ФДПО</p></bio><email>abalenihina88@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7829-2494</contrib-id><contrib-id contrib-id-type="spin">8503-3082</contrib-id><name-alternatives><name xml:lang="en"><surname>Mylnikov</surname><given-names>Pavel Yu.</given-names></name><name xml:lang="ru"><surname>Мыльников</surname><given-names>Павел Юрьевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD-Student, Depart. of Pharmacology with a Course of Pharmacy</p></bio><bio xml:lang="ru"><p>аспирант, каф. фармакологии с курсом фармации ФДПО</p></bio><email>pavelmylnikov@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1688-0017</contrib-id><contrib-id contrib-id-type="spin">2754-1702</contrib-id><name-alternatives><name xml:lang="en"><surname>Shchulkin</surname><given-names>Alexey V.</given-names></name><name xml:lang="ru"><surname>Щулькин</surname><given-names>Алексей Владимирович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>M.D., D. Sci. (Med.), Prof., Depart. of Pharmacology with a Course of Pharmacy, Continuing Professional Education Faculty</p></bio><bio xml:lang="ru"><p>докт. мед. наук, проф., каф. фармакологии с курсом фармации ФДПО</p></bio><email>alekseyshulkin@rambler.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6887-4888</contrib-id><contrib-id contrib-id-type="spin">2865-3080</contrib-id><name-alternatives><name xml:lang="en"><surname>Yakusheva</surname><given-names>Elena N.</given-names></name><name xml:lang="ru"><surname>Якушева</surname><given-names>Елена Николаевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>M.D., D. Sci. (Med.), Prof., Head of Depart. of Pharmacology with a Course of Pharmacy, Continuing Professional Education Faculty</p></bio><bio xml:lang="ru"><p>докт. мед. наук, проф., зав. каф., каф. фармакологии с курсом фармации ФДПО</p></bio><email>enya.rzn@yandex.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Ryazan State Medical University named after I.P. Pavlova</institution></aff><aff><institution xml:lang="ru">Рязанский государственный медицинский университет им. И.П. Павлова</institution></aff><aff><institution xml:lang="zh"></institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Ryazan State Medical University named after I.P. Pavlova</institution></aff><aff><institution xml:lang="ru">Рязанский государственный медицинский университет им. И.П. Павлова</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-10-03" publication-format="electronic"><day>03</day><month>10</month><year>2022</year></pub-date><volume>103</volume><issue>5</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>780</fpage><lpage>787</lpage><history><date date-type="received" iso-8601-date="2021-12-11"><day>11</day><month>12</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2022-09-01"><day>01</day><month>09</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Эко-Вектор</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2025-10-03"/></permissions><self-uri xlink:href="https://kazanmedjournal.ru/kazanmedj/article/view/90127">https://kazanmedjournal.ru/kazanmedj/article/view/90127</self-uri><abstract xml:lang="en"><p><bold>Background.</bold> P-glycoprotein (Pgp) is a multidrug resistance protein 1 with broad substrate specificity. Its functioning can change under the influence of various substances, so the search for endogenous and exogenous compounds that modulate the activity of the transporter protein is an important area of research.</p> <p><bold>Aim.</bold> To evaluate the effect of DL-butionine sulfoximine on the activity and amount of the Pgp transporter protein in Caco-2 cells.</p> <p><bold>Material and methods.</bold> The study was performed on a human colon adenocarcinoma cell line (Caco-2). Cells were incubated with DL-butionine sulfoximine and quinidine (a classical Pgp inhibitor) at concentrations of 1, 5, 10, 50, 100, and 500 µM for 3 hours. Pgp activity was evaluated by the transport of its substrate, fexofenadine, which concentration was determined by high performance liquid chromatography with ultraviolet detection (Stayer, Russia). The results were analyzed using StatSoft Statistica 13.0 (ANOVA), IC50 was calculated using GraphPad Prism 8 software. Differences were considered statistically significant at p &lt;0.05.</p> <p><bold>Results.</bold> Incubation with DL-butionine sulfoximine and quinidine at concentrations of 1–500 µM for 3 hours did not affect the amount of Pgp in Caco-2 cells. Pgp activity decreased when using DL-butionine sulfoximine at concentrations of 50–500 µM by a maximum of 47.7% (p=0.040). Quinidine at concentrations of 5–500 µM reduced Pgp activity by a maximum of 79.1% (p=0.0002) at a concentration of 500 µM. Quinidine inhibited Pgp activity at lower concentrations compared to DL-butionine sulfoximine: the IC50 of fexofenadine with quinidine was 5.16±0.59 µmol/l, for DL-butionine sulfoximine it was 17.21±2.46 µmol/l (p= 0.001).</p> <p><bold>Conclusion.</bold> DL-butionine sulfoximine has a direct inhibitory effect on the activity of the Pgp transporter protein on the Caco-2 cell line.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Актуальность.</bold> Р-гликопротеин (Pgp) — белок множественной лекарственной устойчивости 1, обладающий широкой субстратной специфичностью. Его функционирование может изменяться под влиянием различных веществ, поэтому поиск эндогенных и экзогенных соединений, модулирующих активность белка-транспортёра, — актуальное направление исследований.</p> <p><bold>Цель.</bold> Оценить влияние DL-бутионинсульфоксимина на активность и количество белка-транспортёра Pgp в клетках линии Сасо-2.Материалы и методы исследования. Исследование выполнено на линии клеток аденокарциномы ободочной кишки человека (Caco-2). Клетки инкубировали с DL-бутионинсульфоксимином и хинидином (классический ингибитор Pgp) в концентрациях 1, 5, 10, 50, 100 и 500 мкМ в течение 3 ч. Количество Pgp оценивали методом вестерн-блот с денситометрическим анализом (Bio-Rad, США). Активность Pgp рассчитывали по транспорту его субстрата — фексофенадина, концентрацию которого определяли методом высокоэффективной жидкостной хроматографии с ультрафиолетовым детектированием (Стайер, Россия). Полученные результаты анализировали с помощью StatSoft Statistica 13.0 (ANOVA), расчёт IC50 проводили с использованием программы GraphPad Prism 8. Статистически значимыми считали различия при p &lt;0,05.</p> <p><bold>Результаты.</bold> Инкубация с DL-бутионинсульфоксимином и хинидином в концентрациях 1–500 мкМ в течение 3 ч не влияла на количество Pgp в клетках линии Сасо-2. Активность Pgp снижалась при использовании DL-бутионинсульфоксимина в концентрациях 50–500 мкМ максимально на 47,7% (р=0,040). Хинидин в концентрациях 5–500 мкМ уменьшал активность Pgp максимально на 79,1% (р=0,0002) при концентрации 500 мкМ. Хинидин ингибировал активность Pgp в более низких концентрациях по сравнению с DL-бутионинсульфоксимином: IC50 фексофенадина при использовании хинидина составила 5,16±0,59 мкмоль/л, для DL-бутионинсульфоксимина — 17,21±2,46 мкмоль/л (р=0,001).</p> <p><bold>Вывод.</bold> DL-бутионинсульфоксимин оказывает прямой ингибирующий эффект на активность белка-транспортёра Pgp на клеточной линии Сасо-2.</p></trans-abstract><kwd-group xml:lang="en"><kwd>P-glycoprotein</kwd><kwd>oxidative stress</kwd><kwd>DL-butionine sulfoximine</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>P-гликопротеин</kwd><kwd>окислительный стресс</kwd><kwd>DL-бутионинсульфоксимин</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Исследование выполнено при финансовой поддержке гранта Президента Российской Федерации для государственной поддержки молодых российских учёных — кандидатов наук МК-1856.2020.7.</institution></institution-wrap></funding-source></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Brueck S, Bruckmueller H, Wegner D, Busch D, Martin P, Oswald S, Cascorbi I, Siegmund W. 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