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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">10567</article-id><article-id pub-id-type="doi">10.32607/20758251-2014-6-1-85-95</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">Development of Immunoassays Using Interferometric Real-Time Registration of Their Kinetics</article-title><trans-title-group xml:lang="ru"><trans-title>Разработка иммуноанализа с помощью интерферометрической регистрации его кинетики в реальном времени</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Orlov</surname><given-names>A. V.</given-names></name><name xml:lang="ru"><surname>Орлов</surname><given-names>А. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nikitin@kapella.gpi.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>Burenin</surname><given-names>A. G.</given-names></name><name xml:lang="ru"><surname>Буренин</surname><given-names>А. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nikitin@kapella.gpi.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>Shipunova</surname><given-names>V. O.</given-names></name><name xml:lang="ru"><surname>Шипунова</surname><given-names>В. О.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nikitin@kapella.gpi.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Lizunova</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Лизунова</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nikitin@kapella.gpi.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gorshkov</surname><given-names>B. G.</given-names></name><name xml:lang="ru"><surname>Горшков</surname><given-names>Б. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nikitin@kapella.gpi.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Nikitin</surname><given-names>P. I.</given-names></name><name xml:lang="ru"><surname>Никитин</surname><given-names>П. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>nikitin@kapella.gpi.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Prokhorov General Physics Institute, Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт общей физики им. А.М. Прохорова РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Moscow Institute of Physics and Technology</institution></aff><aff><institution xml:lang="ru">Московский физико-технический институт</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2014-03-15" publication-format="electronic"><day>15</day><month>03</month><year>2014</year></pub-date><volume>6</volume><issue>1</issue><issue-title xml:lang="en">VOL 6, NO1 (2014)</issue-title><issue-title xml:lang="ru">ТОМ 6, №1 (2014)</issue-title><fpage>85</fpage><lpage>95</lpage><history><date date-type="received" iso-8601-date="2020-01-17"><day>17</day><month>01</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2014, Orlov A.V., Burenin A.G., Shipunova V.O., Lizunova A.A., Gorshkov B.G., Nikitin P.I.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2014, Орлов А.В., Буренин А.Г., Шипунова В.О., Лизунова А.А., Горшков Б.Г., Никитин П.И.</copyright-statement><copyright-year>2014</copyright-year><copyright-holder xml:lang="en">Orlov A.V., Burenin A.G., Shipunova V.O., Lizunova A.A., Gorshkov B.G., Nikitin P.I.</copyright-holder><copyright-holder xml:lang="ru">Орлов А.В., Буренин А.Г., Шипунова В.О., Лизунова А.А., Горшков Б.Г., Никитин П.И.</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/10567">https://actanaturae.ru/2075-8251/article/view/10567</self-uri><abstract xml:lang="en"><p>A method for effective development of solid-phase immunoassays on a glass surface and for optimization of related protocols by highly sensitive quantitative monitoring of each assay step has been proposed and experimentally implemented. The method is based on the spectral correlation interferometry (SCI) that allows real-time measuring of the thickness of a biomolecular layer bound to the recognition molecular receptors on the sensor chip surface. The method is realized with compact 3-channel SCI-biosensors that employ as the sensor chips standard cover glass slips without deposition of any additional films. Different schemes for antibody immobilization on a glass surface have been experimentally compared and optimized toward a higher sorption capacity of the sensor chips. Comparative characterization of the kinetics of each immunoassay stage has been implemented with the optimized protocols: i) covalent immobilization of antibody on an epoxylated surface and ii) biotinylated antibody sorption on a biotinylated surface via a high-affinity biotin-streptavidin bond. We have shown that magnetic nanoparticles employed as labels with model detection of cardiac troponin I further amplify the SCI signal, resulting in 100-fold improvement of the detection limit. The developed protocols can also be used with the alternative immunoassay platforms, including the label methods based on registration of only the final assay result, which is the quantity of bound labels.</p></abstract><trans-abstract xml:lang="ru"><p>Предложен и экспериментально реализован метод для эффективной разработки и оптимизации протоколов твердофазного иммуноанализа на поверхности стекла за счет высокочувствительного количественного мониторинга каждой стадии анализа. Метод основан на использовании принципа спектральнокорреляционной интерферометрии (СКИ), позволяющего измерять в реальном времени толщину слоя, образующегося в результате связывания биомолекул из раствора с распознающими молекулярными рецепторами на поверхности сенсорного чипа. Реализация предложенного метода выполнена с помощью компактных трехканальных СКИ-биосенсоров, использующих в качестве сенсорных чипов стандартные покровные стекла без нанесения дополнительных пленок. Проведено экспериментальное сравнение различных схем иммобилизации антител на стеклянную поверхность, а также оптимизация таких схем для достижения высокой сорбционной емкости сенсорных чипов. Выполнена сравнительная характеризация кинетики каждого этапа иммуноанализа, проведенного с использованием оптимизированных протоколов: ковалентной иммобилизации антител на эпоксилированную поверхность и сорбции на биотинилированную поверхность с помощью высокоаффинной связи биотин-стрептавидин. На примере детекции сердечного тропонина I показано, что применение магнитных наночастиц в качестве меток приводит к дополнительному усилению сигнала спектрально-корреляционной интерферометрии, что позволяет улучшить предел детекции в 100 раз. Разработанные протоколы могут использоваться в сочетании с альтернативными платформами иммуноанализа, в том числе основанными на регистрации лишь конечного результата - количества связавшихся меток.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Label-free biosensors</kwd><kwd>interferometry</kwd><kwd>sensor chips</kwd><kwd>surface functionalization</kwd><kwd>surface epoxylation</kwd><kwd>surface biotinylation</kwd><kwd>efficiency of biomolecular immobilization</kwd><kwd>immunoassay</kwd><kwd>magnetic nanoparticles</kwd><kwd>cardiac troponin I</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>безметочные биосенсоры</kwd><kwd>биотинилирование</kwd><kwd>иммуноанализ</kwd><kwd>интерферометрия</kwd><kwd>магнитные наночастицы</kwd><kwd>сенсорные чипы</kwd><kwd>сердечный тропонин I</kwd><kwd>функционализация поверхности</kwd><kwd>эпоксилирование поверхности</kwd><kwd>эффективность иммобилизации биомолекул</kwd></kwd-group><funding-group><funding-statement xml:lang="en">The work was supported by the Russian Foundation for Basic Research (grants №№10-02-01185, 11-02-01440, 11-04-12181-ofi-m 2011, 13-02-01260, 13-03-12468). This work was conducted within the scope of the “Russian Federal Targeted Programme for research and development in priority fields for the development of Russia’s science and technology complex for 2007–2012” (state contract 16.512.11.2124) with the use of equipment from the Center for the Collective Use of Unique Equipment in the Nanotechnology Field at MIPT (CCU MIPT), funded by the Ministry of Education and Science of the Russian Federation.</funding-statement><funding-statement xml:lang="ru">Работа поддержана РФФИ (гранты №10-02-01185, 11-02-01440, 11-04-12181-офи-м 2011, 13-02-01260, 13-03-12468). Работа выполнена в рамках ФЦП «Исследования и разработки по приоритетным направлениям развития научно-технологического комплекса России на 2007–2012 годы» (государственный контракт №16.512.11.2124) с привлечением оборудования Центра коллективного пользования уникальным оборудованием в области нанотехнологий МФТИ (ЦКП МФТИ) при финансовой поддержке Министерства образования и науки РФ.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>1. Vaidya V.S., Bonventre J.V. Biomarkers: In Medicine, Drug Discovery, and Environmental Health: Wiley-Blackwell, 2010. 640 p.</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>2. Yanga Zh., Zhoub D.M. // Clin. Biochem. 2006. V. 39. № 8. P. 771-780.</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>3. Mayeux R. // NeuroRx. 2004. V. 1. № 2. P. 182-188.</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>4. Lundblad R.L. 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