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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">zldm</journal-id><journal-title-group><journal-title xml:lang="ru">Заводская лаборатория. Диагностика материалов</journal-title><trans-title-group xml:lang="en"><trans-title>Industrial laboratory. Diagnostics of materials</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1028-6861</issn><issn pub-type="epub">2588-0187</issn><publisher><publisher-name>ООО «Издательство «ТЕСТ-ЗЛ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.26896/1028-6861-2026-92-7-13-18</article-id><article-id custom-type="elpub" pub-id-type="custom">zldm-2882</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>АНАЛИЗ ВЕЩЕСТВА</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SUBSTANCES ANALYSIS</subject></subj-group></article-categories><title-group><article-title>Разработка и валидация ВЭЖХ-методики определения примеси свободного эмтанзина в составе терапевтического конъюгата на основе рекомбинантной адресной молекулы белковой природы</article-title><trans-title-group xml:lang="en"><trans-title>Development and validation of a HPLC method for the determination of free emtansine impurity in a therapeutic conjugate based on a recombinant targeted protein molecule</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Прач</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Prach</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Анастасия Александровна Прач</p><p>634050, г. Томск, просп. Ленина, д. 30</p><p>634009, г. Томск, Кооперативный пер., д. 5</p></bio><bio xml:lang="en"><p>Anastasia A. Prach</p><p>30, prosp. Lenina, Tomsk, 634050</p><p>5, Kooperativny per., Tomsk, 634009</p></bio><email xlink:type="simple">nastya.prach@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ларькина</surname><given-names>М. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Larkina</surname><given-names>M. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мария Сергеевна Ларькина</p><p>634050, г. Томск, просп. Ленина, д. 30</p><p>634050, г. Томск, Московский тракт, д. 2</p></bio><bio xml:lang="en"><p>Maria S. Larkina</p><p>30, prosp. Lenina, Tomsk, 634050</p><p>2, Moskovsky trakt, Tomsk, 634050</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Авдеева</surname><given-names>Е. Ю.</given-names></name><name name-style="western" xml:lang="en"><surname>Avdeeva</surname><given-names>E. Yu.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Елена Юрьевна Авдеева</p><p>634050, г. Томск, Московский тракт, д. 2</p></bio><bio xml:lang="en"><p>Elena Yu. Avdeeva</p><p>2, Moskovsky trakt, Tomsk, 634050</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кадырова</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kadyrova</surname><given-names>T. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Татьяна Владимировна Кадырова</p><p>634050, г. Томск, Московский тракт, д. 2</p></bio><bio xml:lang="en"><p>Tatiana V. Kadyrova</p><p>2, Moskovsky trakt, Tomsk, 634050</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Кривощеков</surname><given-names>С. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Krivoshchekov</surname><given-names>S. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сергей Владимирович Кривощеков</p><p>634050, г. Томск, Московский тракт, д. 2</p></bio><bio xml:lang="en"><p>Sergey V. Krivoshchekov</p><p>2, Moskovsky trakt, Tomsk, 634050</p></bio><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Белоусов</surname><given-names>М. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Belousov</surname><given-names>M. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михаил Валерьевич Белоусов</p><p>634050, г. Томск, просп. Ленина, д. 30</p><p>634050, г. Томск, Московский тракт, д. 2</p></bio><bio xml:lang="en"><p>Mikhail V. Belousov</p><p>30, prosp. Lenina, Tomsk, 634050</p><p>2, Moskovsky trakt, Tomsk, 634050</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Плотников</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Plotnikov</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Евгений Владимирович Плотников</p><p>634050, г. Томск, просп. Ленина, д. 30</p></bio><bio xml:lang="en"><p>Evgeny V. Plotnikov</p><p>30, prosp. Lenina, Tomsk, 634050</p></bio><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский Томский политехнический университет;&#13;
НИИ онкологии Томского НИМЦ</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Tomsk Polytechnic University;&#13;
Scientific Research Institute of Oncology, Tomsk Scientific Research Center</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Национальный исследовательский Томский политехнический университет;&#13;
Сибирский государственный медицинский университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Tomsk Polytechnic University;&#13;
Siberian State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Сибирский государственный медицинский университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Siberian State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Национальный исследовательский Томский политехнический университет</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Tomsk Polytechnic University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>26</day><month>07</month><year>2026</year></pub-date><volume>92</volume><issue>7</issue><fpage>13</fpage><lpage>18</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Прач А.А., Ларькина М.С., Авдеева Е.Ю., Кадырова Т.В., Кривощеков С.В., Белоусов М.В., Плотников Е.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Прач А.А., Ларькина М.С., Авдеева Е.Ю., Кадырова Т.В., Кривощеков С.В., Белоусов М.В., Плотников Е.В.</copyright-holder><copyright-holder xml:lang="en">Prach A.A., Larkina M.S., Avdeeva E.Y., Kadyrova T.V., Krivoshchekov S.V., Belousov M.V., Plotnikov E.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://www.zldm.ru/jour/article/view/2882">https://www.zldm.ru/jour/article/view/2882</self-uri><abstract><p>Для снижения неблагоприятного воздействия при системном введении цитотоксических агентов, применяемых в терапии онкологических заболеваний, на здоровые ткани используют конъюгаты антитело – лекарство (ADC), которые обеспечивают адресную доставку препаратов в опухолевые ткани. Альтернативой препаратам на основе антител являются конъюгаты цитотоксических агентов и таргетных носителей с меньшим размером молекул, в частности белка DARPin G3, обладающего высокой стабильностью и специфичностью к HER2-положительным раковым клеткам. Объектом исследования был конъюгат таргетного белка, специфичного к рецептору HER2, слитого с альбуминсвязывающим доменом (DARPin G3-ABD), и цитотоксического агента эмтанзина (DM1), находящийся на стадии доклинических испытаний. Из-за риска накопления неконъюгированного эмтанзина, который может вызывать нецелевую токсичность, необходимо контролировать его содержание в препарате. Для этой цели разработан упрощенный и доступный способ определения свободного эмтанзина методом ВЭЖХ, обеспечивающий оперативный контроль качества терапевтических конъюгатов. В ходе пробоподготовки проводили коагуляцию конъюгата в этаноле, затем анализировали супернатант методом микроколоночной жидкостной хроматографии с УФ-детектированием на колонке ProntoSIL-120-5-C18 при выбранных условиях. Предложенная пробоподготовка позволяет проводить хроматографический анализ без использования дорогостоящих колонок для разделения конъюгата и свободного эмтанзина. Разработанная методика определения примеси свободного эмтанзина в составе терапевтического конъюгата DARPin G3-ABD-DM1 валидирована по ключевым показателям, оценены ее метрологические характеристики. Методика апробирована при анализе лабораторных образцов конъюгата: содержание свободного эмтанзина в различных партиях не превышало 0,2 %.</p></abstract><trans-abstract xml:lang="en"><p>To reduce the adverse effects of cytotoxic agents used in cancer therapy on healthy tissues, antibody – drug conjugates are used, which provide targeted drug delivery to tumor tissues. An alternative to antibody-based drugs are conjugates of cytotoxic agents and targeted carriers with smaller molecule sizes, in particular, the DARPin G3 protein, which has high stability and specificity for HER2-positive cancer cells. The object of the study was a conjugate of a targeted protein specific to the HER2 receptor fused to the albumin-binding domain (DARPin G3-ABD) and the cytotoxic agent emtansine (DM1), which is currently in preclinical trials. Due to the risk of accumulation of unconjugated emtansine, which can cause untargeted toxicity, it is necessary to monitor its content. For this purpose, a simplified and affordable technique for the determination of free emtansine by HPLC has been developed, providing operational quality control of therapeutic conjugates. During sample preparation, the conjugate was coagulated in ethanol, then the supernatant was analyzed by micro column chromatography with UV detection on a ProntoSIL-120-5-C18 column under selected conditions. The proposed sample preparation allows for chromatographic analysis without using expensive columns to separate conjugate and free emtansine. The developed technique for determining the impurity of free emtansine in the composition of the therapeutic conjugate DARPin G3-ABD-DM1 has been validated by key indicators, and its metrological characteristics have been evaluated. The technique was tested in the analysis of laboratory conjugate samples: the content of free emtansine did not exceed 0.2%.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ВЭЖХ</kwd><kwd>валидация</kwd><kwd>DARPin G3</kwd><kwd>эмтанзин</kwd><kwd>терапевтический конъюгат</kwd></kwd-group><kwd-group xml:lang="en"><kwd>HPLC</kwd><kwd>validation</kwd><kwd>DARPin G3</kwd><kwd>emtansine</kwd><kwd>therapeutic conjugate</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Bodenko V. V., Larkina M. S., Prach A. 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