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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">Annals of Clinical and Experimental Neurology</journal-id><journal-title-group><journal-title xml:lang="en">Annals of Clinical and Experimental Neurology</journal-title><trans-title-group xml:lang="ru"><trans-title>Анналы клинической и экспериментальной неврологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-5473</issn><issn publication-format="electronic">2409-2533</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">788</article-id><article-id pub-id-type="doi">10.54101/ACEN.2022.3.6</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Original articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Оригинальные статьи</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">A method of inhibiting the ABCB1 protein in the blood-brain barrier <italic>in vivo</italic></article-title><trans-title-group xml:lang="ru"><trans-title>Способ ингибирования белка ABCB1 в гематоэнцефалическом барьере <italic>in vivo</italic></trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5618-7607</contrib-id><name-alternatives><name xml:lang="en"><surname>Chernykh</surname><given-names>Ivan V.</given-names></name><name xml:lang="ru"><surname>Черных</surname><given-names>Иван Владимирович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Сand. Sci. (Biol), Head, Department of pharmaceutical chemistry</p></bio><bio xml:lang="ru"><p>к.б.н., зав. каф. фармацевтической химии</p></bio><email>ivchernykh88@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1688-0017</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>D. Sci. (Med), Associated Professor, Professor, Department of pharmacology</p></bio><bio xml:lang="ru"><p>д.м.н., доцент, профессор каф. фармакологии</p></bio><email>alekseyshulkin@rambler.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><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>Assistant, Department of pharmacology</p></bio><bio xml:lang="ru"><p>ассистент каф. фармакологии</p></bio><email>pavelmylnikov@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3511-7033</contrib-id><name-alternatives><name xml:lang="en"><surname>Kirichenko</surname><given-names>Ekaterina E.</given-names></name><name xml:lang="ru"><surname>Кириченко</surname><given-names>Екатерина Евгеньевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.), Associated Professor, Department of pharmaceutical chemistry</p></bio><bio xml:lang="ru"><p>к.б.н., доцент, доцент каф. фармацевтической химии</p></bio><email>ekaterinakir2013@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1116-6271</contrib-id><name-alternatives><name xml:lang="en"><surname>Gatsanoga</surname><given-names>Maria V.</given-names></name><name xml:lang="ru"><surname>Гацанога</surname><given-names>Мария Валерьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Med), Assistant, Department of pharmacology</p></bio><bio xml:lang="ru"><p>к.м.н., ассистент каф. фармакологии</p></bio><email>mvgatsanoga@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6887-4888</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>D. Sci. (Med), Professor, Head, Department of pharmacology</p></bio><bio xml:lang="ru"><p>д.м.н., профессор, зав. каф. фармакологии</p></bio><email>e.yakusheva@rzgmu.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Ryazan State Medical University</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Рязанский государственный медицинский университет имени академика И.П. Павлова» Минздрава РФ</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2022-10-10" publication-format="electronic"><day>10</day><month>10</month><year>2022</year></pub-date><volume>16</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>47</fpage><lpage>52</lpage><history><date date-type="received" iso-8601-date="2021-11-26"><day>26</day><month>11</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2022-02-14"><day>14</day><month>02</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Chernykh I.V., Shchulkin A.V., Mylnikov P.Y., Kirichenko E.E., Gatsanoga M.V., Yakusheva E.N.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, Черных И.В., Щулькин А.В., Мыльников П.Ю., Кириченко Е.Е., Гацанога М.В., Якушева Е.Н.</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Chernykh I.V., Shchulkin A.V., Mylnikov P.Y., Kirichenko E.E., Gatsanoga M.V., Yakusheva E.N.</copyright-holder><copyright-holder xml:lang="ru">Черных И.В., Щулькин А.В., Мыльников П.Ю., Кириченко Е.Е., Гацанога М.В., Якушева Е.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/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://annaly-nevrologii.com/pathID/article/view/788">https://annaly-nevrologii.com/pathID/article/view/788</self-uri><abstract xml:lang="en"><p><bold><italic>Introduction.</italic></bold> Increased functional activity of the P-glycoprotein transporter (ABCB1) in the blood-brain barrier (BBB) is a possible reason why neuroprotective pharmacotherapy is ineffective after ischaemic stroke.</p> <p>Study <bold><italic>aim</italic></bold> — to develop a way to inhibit the functional activity of ABCB1 at the BBB.</p> <p><bold><italic>Materials and methods.</italic></bold> The study was performed on 60 male Wistar rats weighing 200-280 g. The functional activity of ABCB1 at the BBB was assessed by measuring the plasma and cortical levels of the marker transporter substrate fexofenadine (intravenous administration of 10 mg/kg). Thirty minutes before the administration of fexofenadine, 1 ml/kg of intravenous saline (n = 30) or 17.6 mg/kg of omeprazole, the transporter's systemic inhibitor (n = 30), was administered to the rats. The total amount of fexofenadine in the systemic circulation and the cerebral cortex was assessed using high performance liquid chromatography, by calculating the area under the blood concentration–time curve (AUC0-t(plasma)) or the cerebral cortex concentration (AUC0-t(brain)). BBB permeability was calculated using the ratio AUC0-t(brain)/AUC0-t(plasma).</p> <p><bold><italic>Results.</italic></bold> The administration of omeprazole before fexofenadine did not affect the plasma level of the latter at any time point under analysis. Fexofenadine’s AUC0-t(plasma) also did not differ between the series. However, the administration of omeprazole increased the cortical level of fexofenadine by 2.96 times (p = 0.009), 5 minutes after administration of the latter, and increased the AUC0-t(brain) by 1.49 times (p = 0.012). AUC0-t(brain)/AUC0-t(plasma) increased by 1.71 times when omeprazole was used (p = 0.003). Therefore, omeprazole inhibits the functional activity of ABCB1 at the BBB.</p> <p><bold><italic>Conclusions. </italic></bold>We developed and tested a method for inhibiting ABCB1 activity at the BBB.</p></abstract><trans-abstract xml:lang="ru"><p><bold><italic>Введение.</italic></bold> Повышенная функциональная активность белка — транспортёра гликопротеина-P (ABCB1) в гематоэнцефалическом барьере (ГЭБ) является одной из возможных причин неэффективности нейропротекторной фармакотерапии последствий ишемического инсульта.</p> <p><bold><italic>Цель</italic></bold> исследования — разработать способ ингибирования функциональной активности ABCB1 в ГЭБ.</p> <p><bold><italic>Материалы и методы.</italic></bold> Работа выполнена на 60 крысах-самцах Вистар массой 200–280 г. Функциональную активность ABCB1 в ГЭБ оценивали по содержанию маркерного субстрата транспортёра — фексофенадина (внутривенное введение 10 мг/кг) в плазме крови и коре головного мозга животных. Анализ проводили на фоне внутривенного введения 1 мл/кг изотонического раствора (n = 30) или системного ингибитора транспортера — 17,6 мг/кг омепразола (n = 30) за 30 мин до введения фексофенадина. Общее количество фексофенадина в системном кровотоке и в коре больших полушарий оценивали методом высокоэффективной жидкостной хроматографии с расчётом площади под кривой концентрация вещества–время в крови (AUC0-t(плазма)) или ткани коры больших полушарий головного мозга (AUC0-t(мозг)). Проницаемость ГЭБ оценивали по показателю AUC0-t(мозг)/AUC0-t(плазма).</p> <p><bold><italic>Результаты.</italic></bold> Введение омепразола перед фексофенадином не влияло на концентрацию последнего в плазме крови крыс ни в одну из анализируемых временных точек. AUC0-t(плазма) фексофенадина также не различалась между сериями. Однако введение омепразола повышало концентрацию фексофенадина в коре больших полушарий через 5 мин после введения последнего в 2,96 раза (p = 0,009) и увеличивало AUC0-t(мозг) в 1,49 раза (p = 0,012). Показатель AUC0-t(мозг)/AUC0-t(плазма) при использовании омепразола возрастал в 1,71 раза (p = 0,003). Таким образом, омепразол ингибирует функциональную активность ABCB1 в ГЭБ.</p> <p><bold><italic>Выводы. </italic></bold>Разработан и апробирован метод ингибирования активности ABCB1 в ГЭБ.</p></trans-abstract><kwd-group xml:lang="en"><kwd>glycoprotein-P</kwd><kwd>ABCB1 protein</kwd><kwd>functional activity</kwd><kwd>blood-brain barrier</kwd><kwd>omeprazole</kwd><kwd>neuroprotection</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>гликопротеин-Р</kwd><kwd>белок ABCB1</kwd><kwd>функциональная активность</kwd><kwd>гематоэнцефалический барьер</kwd><kwd>омепразол</kwd><kwd>нейропротекция</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Linlin S.C., Yan C., Mruc D.D. Drug transporter, P-glycoprotein (MDR1), is an integrated component of the mammalian blood-testis barrier. Int. J. Biochem. Cell Biol. 2009; 41(12): 2578–2587. 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