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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">27425</article-id><article-id pub-id-type="doi">10.32607/actanaturae.27425</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">A Vector Nanoplatform for the Bioimaging of Deep-Seated Tumors</article-title><trans-title-group xml:lang="ru"><trans-title>Векторная наноплатформа для прижизненной визуализации глубинных опухолей</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shramova</surname><given-names>E. I.</given-names></name><name xml:lang="ru"><surname>Шрамова</surname><given-names>Е. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>gmb@ibch.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Deyev</surname><given-names>S. M.</given-names></name><name xml:lang="ru"><surname>Деев</surname><given-names>С. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>gmb@ibch.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Proshkina</surname><given-names>G. M.</given-names></name><name xml:lang="ru"><surname>Прошкина</surname><given-names>Г. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>gmb@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, Moscow, Russian Academy of science</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">Sechenov First Moscow State Medical University (Sechenov University)</institution></aff><aff><institution xml:lang="ru">Первый Московский государственный медицинский университет имени Сеченова (Сеченовский университет)</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">National Research Centre “Kurchatov Institute”</institution></aff><aff><institution xml:lang="ru">Национальный исследовательский центр «Курчатовский институт»</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-08-21" publication-format="electronic"><day>21</day><month>08</month><year>2024</year></pub-date><volume>16</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>72</fpage><lpage>81</lpage><history><date date-type="received" iso-8601-date="2024-05-12"><day>12</day><month>05</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-05-21"><day>21</day><month>05</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Shramova E.I., Deyev S.M., Proshkina G.M.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Шрамова Е.И., Деев С.М., Прошкина Г.М.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Shramova E.I., Deyev S.M., Proshkina G.M.</copyright-holder><copyright-holder xml:lang="ru">Шрамова Е.И., Деев С.М., Прошкина Г.М.</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/27425">https://actanaturae.ru/2075-8251/article/view/27425</self-uri><abstract xml:lang="en"><p>Today, in preclinical studies, optical bioimaging based on luminescence and fluorescence is indispensable in studying the development of neoplastic transformations, the proliferative activity of the tumor, its metastatic potential, as well as the therapeutic effect of antitumor agents. In order to expand the capabilities of optical imaging, sensors based on the bioluminescence resonance energy transfer (BRET) mechanism and, therefore, independent of an external light source are being developed. A targeted nanoplatform based on HER2-specific liposomes whose internal environment contains a genetically encoded BRET sensor was developed in this study to visualize deep-seated tumors characterized by overexpression of human epidermal growth factor receptor type 2 (HER2). The BRET sensor is a hybrid protein consisting of the highly catalytic luciferase NanoLuc (an energy donor) and a LSSmKate1 red fluorescent protein with a large Stokes shift (an energy acceptor). During the bioimaging of disseminated intraperitoneal tumors formed by HER2-positive SKOV3.ip1cells of serous ovarian cystadenocarcinoma, it was shown that the developed system is applicable in detecting deep-seated tumors of a certain molecular profile. The developed system can become an efficient platform for optimizing preclinical studies of novel targeted drugs.</p></abstract><trans-abstract xml:lang="ru"><p>Оптический биоимиджинг на основе люминесценции и флуоресценции в доклинических исследованиях на сегодняшний день является незаменимым подходом при оценке развития неопластических трансформаций, изучения пролиферативной активности опухоли, ее метастатического потенциала, а также при оценке терапевтического эффекта противоопухолевых агентов. В рамках расширения возможностей оптической визуализации интерес представляет создание сенсоров, основанных на биолюминесцентной резонансной передаче энергии (BRET) и не зависящих от внешнего источника облучения. Для визуализации глубинных опухолей, характеризующихся сверхэкспрессией рецептора второго типа эпидермального фактора роста человека (HER2), в данной работе разработана адресная наноплатформа на основе HER2-специфичных липосом, внутренняя среда которых содержит генетически кодируемый BRET-сенсор. BRET-сенсор представлен гибридным белком, функциональные модули которого включают высококаталитическую люциферазу NanoLuc (донор энергии) и красный флуоресцентный белок с большим стоксовым сдвигом LSSmKate1 (акцептор энергии). В опытах in vivo по визуализации внутрибрюшинных диссеминированных опухолей, сформированных клетками серозной цистаденокарциномы яичников SKOV3.ip1 и характеризующихся сверхэкспрессией HER2, установлено, что разработанная система применима для детекции глубоко расположенных опухолей определенного молекулярного профиля. Разработанная адресная система может стать эффективной платформой для оптимизации доклинических исследований новых таргетных препаратов.</p></trans-abstract><kwd-group xml:lang="en"><kwd>bioluminescence resonance energy transfer</kwd><kwd>DARPins</kwd><kwd>protein with a large Stokes shift LSSmKate1</kwd><kwd>epidermal growth factor receptor type 2 HER2</kwd><kwd>NanoLuc luciferase</kwd><kwd>molecular targeted bioimaging</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>биолюминесцентный резонансный перенос энергии</kwd><kwd>DARPins-белки</kwd><kwd>белок с большим стоксовым сдвигом LSSmKate1</kwd><kwd>рецептор второго типа эпидермального фактора роста HER2</kwd><kwd>люцифераза NanoLuc</kwd><kwd>молекулярно-таргетный биоимиджинг</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap></funding-source><award-id>24-14-00088</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Bai J.W., Qiu S.Q., Zhang G.J. // Signal Transduct Target Ther. 2023. 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