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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">biopreparat</journal-id><journal-title-group><journal-title xml:lang="ru">БИОпрепараты. Профилактика, диагностика, лечение</journal-title><trans-title-group xml:lang="en"><trans-title>Biological Products. Prevention, Diagnosis, Treatment</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2221-996X</issn><issn pub-type="epub">2619-1156</issn><publisher><publisher-name>Scientific Centre for Expert Evaluation of Medicinal Products</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.30895/2221-996X-2026-26-1-85-96</article-id><article-id custom-type="elpub" pub-id-type="custom">biopreparat-738</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>Тема номера: ИННОВАЦИОННЫЕ БИОЛОГИЧЕСКИЕ ЛЕКАРСТВЕННЫЕ ПРЕПАРАТЫ: ОТ ФУНДАМЕНТАЛЬНЫХ ИССЛЕДОВАНИЙ К РЕАЛЬНОЙ КЛИНИЧЕСКОЙ ПРАКТИКЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Issue topic INNOVATIVE BIOLOGICAL PRODUCTS: TRANSLATING FUNDAMENTAL RESEARCH INTO REAL CLINICAL PRACTICE</subject></subj-group></article-categories><title-group><article-title>Оценка активности филграстима биологическим методом in vitro: валидация методики</article-title><trans-title-group xml:lang="en"><trans-title>Validation of an in vitro biological method for filgrastim potency assessment</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6176-5934</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гайдерова</surname><given-names>Л. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Gaiderova</surname><given-names>L. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гайдерова Лидия Александровна, канд. мед. наук </p><p>Петровский б-р, д. 8, стр. 2, Москва, 127051</p></bio><bio xml:lang="en"><p>Lidia A. Gaiderova, Cand. Sci. (Med.) </p><p>8/2 Petrovsky Blvd, Moscow 127051</p></bio><email xlink:type="simple">gaiderova@expmed.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9889-4038</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Байкова</surname><given-names>М. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Baykova</surname><given-names>M. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Байкова Марина Леонидовна </p><p>Петровский б-р, д. 8, стр. 2, Москва, 127051</p></bio><bio xml:lang="en"><p>Marina L. Baykova</p><p>8/2 Petrovsky Blvd, Moscow 127051</p></bio><email xlink:type="simple">baikova@expmed.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6966-9859</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Головинская</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Golovinskaya</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Головинская Ольга Вячеславовна, канд. мед. наук </p><p>Петровский б-р, д. 8, стр. 2, Москва, 127051</p></bio><bio xml:lang="en"><p>Olga V. Golovinskaya, Cand. Sci. (Med.) </p><p>8/2 Petrovsky Blvd, Moscow 127051</p></bio><email xlink:type="simple">golovinskaya@expmed.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7864-8972</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лысикова</surname><given-names>С. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Lysikova</surname><given-names>S. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лысикова Светлана Леонидовна, канд. мед. наук </p><p>Петровский б-р, д. 8, стр. 2, Москва, 127051</p></bio><bio xml:lang="en"><p>Svetlana L. Lysikova, Cand. Sci. (Med.) </p><p>8/2 Petrovsky Blvd, Moscow 127051</p></bio><email xlink:type="simple">lisikova@expmed.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8677-0927</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Фоменко</surname><given-names>В. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Fomenko</surname><given-names>V. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Фоменко Виктория Валерьевна </p><p>Петровский б-р, д. 8, стр. 2, Москва, 127051</p></bio><bio xml:lang="en"><p>Viktoriia V. Fomenko</p><p>8/2 Petrovsky Blvd, Moscow 127051</p></bio><email xlink:type="simple">fomenkovv@expmed.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6807-508X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Алпатова</surname><given-names>Н. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Alpatova</surname><given-names>N. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Алпатова Наталья Александровна, д-р биол. наук </p><p>Петровский б-р, д. 8, стр. 2, Москва, 127051</p></bio><bio xml:lang="en"><p>Natalia А. Alpatova, Dr. Sci. (Biol.) </p><p>8/2 Petrovsky Blvd, Moscow 127051</p></bio><email xlink:type="simple">alpatova@expmed.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральное государственное бюджетное учреждение «Научный центр экспертизы средств медицинского применения» Министерства здравоохранения Российской Федерации</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Scientific Centre for Expert Evaluation of Medicinal Products</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>01</day><month>04</month><year>2026</year></pub-date><volume>26</volume><issue>1</issue><fpage>85</fpage><lpage>96</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Гайдерова Л.А., Байкова М.Л., Головинская О.В., Лысикова С.Л., Фоменко В.В., Алпатова Н.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Гайдерова Л.А., Байкова М.Л., Головинская О.В., Лысикова С.Л., Фоменко В.В., Алпатова Н.А.</copyright-holder><copyright-holder xml:lang="en">Gaiderova L.A., Baykova M.L., Golovinskaya O.V., Lysikova S.L., Fomenko V.V., Alpatova N.A.</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.biopreparations.ru/jour/article/view/738">https://www.biopreparations.ru/jour/article/view/738</self-uri><abstract><sec><title>ВВЕДЕНИЕ</title><p>ВВЕДЕНИЕ. Филграстим представляет собой гранулоцитарный колониестимулирующий фактор человека, изготовленный по технологии рекомбинантных ДНК. Поскольку при производственном контроле качества филграстима должна применяться валидированная методика, первостепенное значение имеет установление ее валидационных характеристик методики в полном объеме, а при замене критичных реагентов/материалов/параметров — подтверждение ранее установленных.</p></sec><sec><title>ЦЕЛЬ</title><p>ЦЕЛЬ. Выбор параметров и подтверждение ряда валидационных характеристик методики оценки специфической активности филграстима биологическим методом in vitro при использовании клеточной линии NFS-60.</p></sec><sec><title>МАТЕРИАЛЫ И МЕТОДЫ</title><p>МАТЕРИАЛЫ И МЕТОДЫ. Специфическую активность филграстима оценивали по интенсивности флуоресценции красителя аlamarBlue™ при длинах волн возбуждения (530 нм) и эмиссии (620 нм), прямо пропорциональной уровню пролиферации клеток линии NFS-60 под действием филграстима в дозах от 0,1 до 208 МЕ/мл. Полученные данные анализировали в программе PLA 2.0.0 методом параллельных линий с использованием 4-параметрической логистической функции 4PL.</p></sec><sec><title>РЕЗУЛЬТАТЫ</title><p>РЕЗУЛЬТАТЫ. Методика охарактеризована как прецизионная: значение коэффициента вариации (CV) при изучении повторяемости и внутрилабораторной прецизионности составляет 6,20 и 1,19% соответственно (критерий приемлемости CV≤25%). Методика линейна — коэффициент детерминации (R2) линейной функции составляет 0,99 при значении   критерия   приемлемости   R2≥0,95.   Значение   степени   извлечения   составляет   101,6% и не превышает отклонения ±10% от ожидаемого значения. Методика устойчива к увеличению плотности клеточной суспензии с 1,5×105 до 3,0×105 клеток/мл (CV=0,07%) и увеличению продолжительности инкубации образцов филграстима с клеточной суспензией с 48 до 72 ч (CV=4,2%) или с флуоресцентным красителем с 4 до 6 ч (CV=2,05%).</p></sec><sec><title>ВЫВОДЫ</title><p>ВЫВОДЫ. Методика оценки специфической активности препаратов на основе филграстима   в   условиях   in   vitro   при   использовании   клеток   линии   NFS-60   характеризуется линейностью, прецизионностью и   правильностью;   показана   устойчивость   методики при контролируемом изменении ряда параметров. Исследование подтверждает пригодность использования клеток линии NFS-60 при оценке специфической активности лекарственных средств на основе филграстима. Это имеет важное значение для производителей с точки зрения расширения спектра клеточных линий, применяемых при оценке качества препаратов.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>INTRODUCTION</title><p>INTRODUCTION. Filgrastim is a human granulocyte colony-stimulating factor produced using recombinant DNA technology. Since filgrastim quality control necessitates a validated method, establishing the entire method validation parameters is of high priority; confirming the previously established parameters gains primary importance when substituting critical reagents/ materials/parameters.</p></sec><sec><title>AIM</title><p>AIM. This study aimed to select and confirm a number of validation parameters for in vitro biological method that would assess filgrastim potency using NFS-60 cell line.</p></sec><sec><title>MATERIALS AND METHODS</title><p>MATERIALS AND METHODS. Filgrastim potency was assessed by fluorescence intensity of alamarBlue™ reagent at excitation wavelengths of 530 nm and emission of 620 nm directly proportional to proliferation level of NFS-60 cells exposed to filgrastim 0.1 to 208 IU/mL. Statistical analysis of the results was performed using the 4-parameter logistic function 4PL and the parallel line analysis in PLA 2.0.0 software.</p></sec><sec><title>RESULTS</title><p>RESULTS. The method was deemed precise: the coefficient of variation (CV) in the repeatability study was 6.20%, and the intermediate precision study showed CV 1.19% (acceptance criterion CV≤25%). The method was linear; the coefficient of determination for the linear function was R2=0.99 (acceptance criterion R2≥0.95). The degree of recovery was 101.6% and did not exceed ±10% of the expected value. The method was robust to an increased density of the cell suspension from 1.5×105 to 3.0×105 cells/mL (CV=0.07%) and to prolonged incubation of filgrastim samples with the cell suspension (from 48 to 72 h, CV=4.2%) or with fluorescent dye (from 4 to 6 h, CV=2.05%).</p></sec><sec><title>CONCLUSIONS</title><p>CONCLUSIONS. The in vitro method assessing specific potency of filgrastim-based preparations using NFS-60 cell line is linear, precise, and accurate, and has proven to be stable under controlled changes of certain parameters. Confirmed applicability of NFS-60 cell line for assessing the potency of filgrastim-based preparations is essential for manufacturers, since it expands the range of cell cultures used for quality assessment of preparations.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>специфическая активность</kwd><kwd>биологический метод</kwd><kwd>валидационные характеристики</kwd><kwd>правильность</kwd><kwd>линейность</kwd><kwd>робастность</kwd><kwd>прецизионность</kwd><kwd>линия клеток NFS-60</kwd><kwd>гранулоцитарный колониестимулирующий фактор</kwd></kwd-group><kwd-group xml:lang="en"><kwd>specific activity</kwd><kwd>biological method</kwd><kwd>validation parameters</kwd><kwd>correctness</kwd><kwd>linearity</kwd><kwd>robustness</kwd><kwd>precision</kwd><kwd>NFS-60 cell line</kwd><kwd>granulocyte colony-stimulating factor</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания ФГБУ «НЦЭСМП» Минздрава России № 056-00061-26-00 на проведение прикладных научных исследований (номер государственного учета НИР 124022200103-5).</funding-statement><funding-statement xml:lang="en">The study was conducted by the Scientific Centre for Expert Evaluation of Medicinal Products as part of the applied research funded under State Assignment No. 056-00061-26-00 (R&amp;D Registry No. 124022200103-5)</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Trinh NTM, Thuoc TL, Thao DTP. 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