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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="review-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">11033</article-id><article-id pub-id-type="doi">10.32607/actanaturae.11033</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>Review Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Comparative Analysis of the Effects of Upconversion Nanoparticles on Normal and Tumor Brain Cells</article-title><trans-title-group xml:lang="ru"><trans-title>Сравнительный анализ действия антистоксовых нанофосфоров на нормальные и опухолевые клетки нервной системы</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Mishchenko</surname><given-names>T. A.</given-names></name><name xml:lang="ru"><surname>Мищенко</surname><given-names>Татьяна Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>saharnova87@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Mitroshina</surname><given-names>Е. V.</given-names></name><name xml:lang="ru"><surname>Митрошина</surname><given-names>Е. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>saharnova87@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Smyshlyaeva</surname><given-names>А. S.</given-names></name><name xml:lang="ru"><surname>Смышляева</surname><given-names>А. С.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>saharnova87@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Guryev</surname><given-names>Е. L.</given-names></name><name xml:lang="ru"><surname>Гурьев</surname><given-names>Е. Л.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>saharnova87@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Vedunova</surname><given-names>М. V.</given-names></name><name xml:lang="ru"><surname>Ведунова</surname><given-names>М. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>saharnova87@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">National Research Lobachevsky State University of Nizhny Novgorod</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский Нижегородский государственный университет им. Н.И. Лобачевского</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Privolzhsky Research Medical University</institution></aff><aff><institution xml:lang="ru">Приволжский исследовательский медицинский университет Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2020-08-07" publication-format="electronic"><day>07</day><month>08</month><year>2020</year></pub-date><volume>12</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>86</fpage><lpage>94</lpage><history><date date-type="received" iso-8601-date="2020-06-01"><day>01</day><month>06</month><year>2020</year></date><date date-type="accepted" iso-8601-date="2020-06-01"><day>01</day><month>06</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2020, Mishchenko T.A., Mitroshina Е.V., Smyshlyaeva А.S., Guryev Е.L., Vedunova М.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2020, Мищенко Т.А., Митрошина Е.В., Смышляева А.С., Гурьев Е.Л., Ведунова М.В.</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="en">Mishchenko T.A., Mitroshina Е.V., Smyshlyaeva А.S., Guryev Е.L., Vedunova М.V.</copyright-holder><copyright-holder xml:lang="ru">Мищенко Т.А., Митрошина Е.В., Смышляева А.С., Гурьев Е.Л., Ведунова М.В.</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/11033">https://actanaturae.ru/2075-8251/article/view/11033</self-uri><abstract xml:lang="en"><p>Glioma is the most aggressive type of brain tumors encountered in medical practice. The high frequency of diagnosed cases and risk of metastasis, the low efficiency of traditional therapy, and the usually unfavorable prognosis for patients dictate the need to develop alternative or combined approaches for an early diagnosis and treatment of this pathology. High expectations are placed on the use of upconversion nanoparticles (UCNPs). In this study, we have produced and characterized UCNPs doped with the rare-earth elements ytterbium and thulium. Our UCNPs had photoluminescence emission maxima in the visible and infrared spectral regions, which allow for deep optical imaging of tumor cells in the brain. Moreover, we evaluated the toxicity effects of our UCNPs on a normal brain and glioma cells. It was revealed that our UCNPs are non-toxic to glioma cells but have a moderate cytotoxic effect on primary neuronal cultures at high concentrations, a condition that is characterized by a decreased cellular viability and changes in the functional metabolic activity of neuron-glial networks. Despite the great potential associated with the use of these UCNPs as fluorescent markers, there is a need for further studies on the rate of the UCNPs accumulation and excretion in normal and tumor brain cells, and the use of their surface modifications in order to reduce their cytotoxic effects.</p></abstract><trans-abstract xml:lang="ru"><p>Глиома – наиболее агрессивный вид опухолей головного мозга. Высокая частота диагностируемых случаев глиомы, риск образования метастазов, низкая эффективность традиционной терапии и неутешительный прогноз для пациентов диктуют необходимость поиска альтернативных или комбинированных подходов к своевременной диагностике и лечению данной патологии. Особые перспективы связывают с применением антистоксовых нанофосфоров (НАФ). В настоящей работе получены и охарактеризованы НАФ, содержащие редкоземельные элементы иттербий и тулий. Эти НАФ имеют максимумы эмиссии фотолюминесценции в видимой и инфракрасной областях спектра, что дает возможность глубокой оптической визуализации опухолевых клеток в головном мозге. Исследована токсичность НАФ в отношении нормальных клеток нервной системы и клеток глиомы. Показано, что НАФ не оказывают цитотоксического действия на опухолевые клетки, однако в высоких концентрациях проявляют умеренный цитотоксический эффект в первичных нейрональных культурах, характеризующийся снижением жизнеспособности и изменением функциональной активности нейроглиальных сетей. Высокая перспективность применения НАФ в качестве люминесцентных маркеров делает необходимым изучение скорости накопления и выведения НАФ в опухолевых и здоровых клетках нервной системы, а также возможностей модификации поверхности наночастиц для снижения токсических эффектов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>upconversion nanoparticles</kwd><kwd>primary hippocampal cultures</kwd><kwd>glioma</kwd><kwd>U-251 MG</kwd><kwd>GL261</kwd><kwd>toxicity</kwd><kwd>functional neural network activity</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>антистоксовые нанофосфоры</kwd><kwd>первичные культуры гиппокампа</kwd><kwd>глиома</kwd><kwd>U-251 MG</kwd><kwd>GL261</kwd><kwd>токсичность</kwd><kwd>функциональная нейросетевая активность</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>18-29-01055</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Tykocki T., Eltayeb M. // J. 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