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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">Acta Naturae</journal-id><journal-title-group><journal-title xml:lang="en">Acta Naturae</journal-title><trans-title-group xml:lang="ru"><trans-title>Acta Naturae</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-8251</issn><publisher><publisher-name xml:lang="en">Acta Naturae Ltd</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">10946</article-id><article-id pub-id-type="doi">10.32607/actanaturae.10946</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Research Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Экспериментальные 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">Lipophilic prodrug of methotrexate in the membrane of liposomes promotes their uptake by human blood phagocytes</article-title><trans-title-group xml:lang="ru"><trans-title>Липофильное пролекарство метотрексата в мембране липосом усиливает их фагоцитоз в крови человека</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Tretiakova</surname><given-names>D. C.</given-names></name><name xml:lang="ru"><surname>Третьякова</surname><given-names>Д. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>elvod@lipids.ibch.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Khaidukov</surname><given-names>S. V.</given-names></name><name xml:lang="ru"><surname>Хайдуков</surname><given-names>С. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>elvod@lipids.ibch.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Babayants</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Бабаянц</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>elvod@lipids.ibch.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Frolova</surname><given-names>I. S.</given-names></name><name xml:lang="ru"><surname>Фролова</surname><given-names>И. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>elvod@lipids.ibch.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shcheglovitova</surname><given-names>O. N.</given-names></name><name xml:lang="ru"><surname>Щегловитова</surname><given-names>О. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>elvod@lipids.ibch.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Onishchenko</surname><given-names>N. R.</given-names></name><name xml:lang="ru"><surname>Онищенко</surname><given-names>Н. Р.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>elvod@lipids.ibch.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Vodovozova</surname><given-names>Elena L.</given-names></name><name xml:lang="ru"><surname>Водовозова</surname><given-names>Елена Львовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="ru"><p>зав. лабораторией химии липидов</p></bio><email>elvod@lipids.ibch.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Shemyakin–Ovchinnikov Institute of Bioorganic Chemistry, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт биоорганической химии им. академиков М.М. Шемякина и Ю.А. Овчинникова РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Gamaleya National Research Center for Epidemiology and Microbiology, Ministry of Healthcare of the Russian Federation</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский центр эпидемиологии и микробиологии имени почетного академика Н.Ф. Гамалеи Министерства здравоохранения Российской Федерации</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2020-04-16" publication-format="electronic"><day>16</day><month>04</month><year>2020</year></pub-date><volume>12</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>99</fpage><lpage>109</lpage><history><date date-type="received" iso-8601-date="2020-03-30"><day>30</day><month>03</month><year>2020</year></date><date date-type="accepted" iso-8601-date="2020-04-06"><day>06</day><month>04</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2020, Tretiakova D.C., Khaidukov S.V., Babayants A.A., Frolova I.S., Shcheglovitova O.N., Onishchenko N.R., Vodovozova E.L.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2020, Третьякова Д.С., Хайдуков С.В., Бабаянц А.А., Фролова И.С., Щегловитова О.Н., Онищенко Н.Р., Водовозова Е.Л.</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="en">Tretiakova D.C., Khaidukov S.V., Babayants A.A., Frolova I.S., Shcheglovitova O.N., Onishchenko N.R., Vodovozova E.L.</copyright-holder><copyright-holder xml:lang="ru">Третьякова Д.С., Хайдуков С.В., Бабаянц А.А., Фролова И.С., Щегловитова О.Н., Онищенко Н.Р., Водовозова Е.Л.</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://actanaturae.ru/2075-8251/article/view/10946">https://actanaturae.ru/2075-8251/article/view/10946</self-uri><abstract xml:lang="en"><p>Previously, we showed that incorporation of methotrexate (MTX) in the form of a lipophilic prodrug (MTXDG) in 100-nm lipid bilayer liposomes of egg phosphatidylcholine can allow one to reduce toxicity and improve the antitumor efficiency of MTX in a mouse model of T-cell leukemic lymphoma. However, in our hemocompatibility tests <italic>in</italic> <italic>vitro</italic>, MTX liposomes caused complement (C) activation, obviously due to binding on the liposome surface and fragmentation of the C3 complement factor. In this work, we studied the interactions of MTX liposomes carrying stabilizing molecules phosphatidylinositol (PI), ganglioside GM<sub>1</sub>, or a lipid conjugate of <italic>N</italic>-carboxymethylated oligoglycine (CMG) in the bilayer with subpopulations of human blood leukocytes. Liposomes labeled with BODIPY-phosphatidylcholine were incubated with whole blood (30 min and 1 h, 37°C), blood cells were lysed with a hypotonic buffer, and the fluorescence of the liposomes bound but not internalized by the leukocytes was quenched by crystal violet. Cell suspensions were analyzed by flow cytometry. Incorporation of MTXDG dramatically enhanced the phagocytosis of liposomes of any composition by monocytes. Neutrophils consumed much less of the liposomes. Lymphocytes did not accumulate liposomes. The introduction of PI into MTX liposomes practically did not affect the specific consumption of liposomes by monocytes, while CMG was likely to increase the consumption rate regardless of the presence of MTXDG. The GM<sub>1</sub> ganglioside presumably shielded MTX liposomes from phagocytosis by one of the monocyte populations and increased the efficiency of monocyte uptake by another population, probably one expressing C3b-binding receptors (C3b was detected on liposomes after incubation with blood plasma). MTX liposomes were shown to have different effects on TNF-α production by activated leukocytes, depending on the structure of the stabilizing molecule.</p></abstract><trans-abstract xml:lang="ru"><p>Ранее нами было показано, что включение метотрексата (МТХ) в виде липофильного пролекарства (MTXDG) в липидный бислой 100-нм липосом, сформированных на основе яичного фосфатидилхолина, позволяет уменьшить токсичность и увеличить противоопухолевую эффективность МТХ в модели лейкемического варианта Т-клеточной лимфомы мышей. Однако в тестах на гемосовместимость <italic>in vitro</italic> МТХ-липосомы активировали систему комплемента, очевидно, за счет связывания на поверхности и фрагментации компонента С3. В данной работе изучено взаимодействие МТХ-липосом, несущих в бислое стабилизирующие молекулы – фосфатидилинозит (PI), ганглиозид GM<sub>1</sub> или липидный конъюгат N-карбоксиметилированного олигоглицина (CMG), – с субпопуляциями лейкоцитов крови человека. Меченные BODIPY-фосфатидилхолином липосомы инкубировали с цельной кровью (30 мин и 1 ч, 37°C), лизировали эритроциты гипотоническим буфером, тушили флуоресценцию связанных, но не поглощенных лейкоцитами липосом кристаллическим фиолетовым и анализировали суспензии клеток проточной цитометрией. Показано, что включение MTXDG резко усиливает фагоцитоз липосом любого состава моноцитами. Нейтрофилы поглощают гораздо меньше липосом. Лимфоциты не аккумулируют липосомы. Введение PI в МТХ-липосомы практически не влияет на удельный уровень их поглощения моноцитами, а CMG скорее повышает его независимо от присутствия MTXDG. Ганглиозид GM<sub>1</sub> предположительно экранирует МТХ-липосомы от фагоцитоза одной популяцией моноцитов, но увеличивает эффективность поглощения моноцитами другой популяции, вероятно, c повышенной экспрессией рецепторов к фрагментам С3b (последние обнаружены на липосомах после инкубации с плазмой крови). Показано, что МТХ-липосомы по-разному влияют на продукцию TNF-α активированными лейкоцитами в зависимости от структуры стабилизирующих молекул.</p></trans-abstract><kwd-group xml:lang="en"><kwd>methotrexate</kwd><kwd>lipophilic prodrug</kwd><kwd>liposomes</kwd><kwd>leukocytes</kwd><kwd>phagocytosis</kwd><kwd>flow cytometry</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>лейкоциты</kwd><kwd>липосомы</kwd><kwd>липофильное пролекарство</kwd><kwd>метотрексат</kwd><kwd>фагоцитоз</kwd><kwd>цитофлуориметрия</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>16-04-01585</award-id></award-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>19-015-00499</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>World Health Organization. 20th WHO Model List of Essential Medicines (March 2017, amended August 2017) http://www.who.int/medicines/publications/essentialmedicines/en/. 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