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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">vestich</journal-id><journal-title-group><journal-title xml:lang="ru">Известия Национальной академии наук Беларуси. Серия химических наук</journal-title><trans-title-group xml:lang="en"><trans-title>Proceedings of the National Academy of Sciences of Belarus, Chemical Series</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8331</issn><issn pub-type="epub">2524-2342</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.29235/1561-8331-2024-60-4-314-325</article-id><article-id custom-type="elpub" pub-id-type="custom">vestich-917</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>БИООРГАНИЧЕСКАЯ ХИМИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BIOORGANIC CHEMISTRY</subject></subj-group></article-categories><title-group><article-title>Комбинированные системы полимеразной цепной реакции и иммуноанализа с времяразрешенной флуориметрией или мембранной иммунохроматографией для количественного определения ДНК бактерий Salmonella enterica</article-title><trans-title-group xml:lang="en"><trans-title>Combined systems of polymerase chain reaction and a time-resolved fluorescence immunoassay or membrane immunochromatography for quantitative determination of Salmonella enterica bacterial DNA</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>Серченя</surname><given-names>Т. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Serchenya</surname><given-names>T. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Серченя Татьяна Сергеевна – кандидат химических наук, доцент, ведущий научный сотрудник</p><p>ул. Академика В. Ф. Купревича, 5/2, 220084, Минск</p></bio><bio xml:lang="en"><p>Serchenya Tatyana S. – Ph. D. (Chemistry), Associate Professor, Leading Researcher</p><p>5/2, Academician V. F. Kuprevich Str., 220084, Minsk</p></bio><email xlink:type="simple">serchenya@iboch.by</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>Охремчук</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Akhremchuk</surname><given-names>K. U.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Охремчук Екатерина Владимировна – кандидат биологических наук, научный сотрудник</p><p>ул. Академика В. Ф. Купревича, 2, 220084</p></bio><bio xml:lang="en"><p>Akhremchuk Katsiaryna U. – Ph. D. (Biology), Researcher</p><p>2, Academician V. F. Kuprevich Str., 220084, Minsk</p></bio><email xlink:type="simple">katerina_akhr@bio.bsu.by</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Валентович</surname><given-names>Л. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Valentovich</surname><given-names>L. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Валентович Леонид Николаевич – кандидат биологических наук, доцент, заведующий лабораторией</p><p>ул. Академика В. Ф. Купревича, 2, 220084</p></bio><bio xml:lang="en"><p>Valentovich Leonid N. – Ph. D. (Biology), Head of Laboratory</p><p>2, Academician V. F. Kuprevich Str., 220084, Minsk</p></bio><email xlink:type="simple">valentovich@mbio.bas-net.by</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лапина</surname><given-names>В. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Lapina</surname><given-names>V. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лапина Виктория Сергеевна – младший научный сотруд- ник</p><p>ул. Академика В. Ф. Купревича, 5/2, 220084, Минск</p></bio><bio xml:lang="en"><p>Lapina Victoryia S. – Junior Researcher</p><p>5/2, Academician V. F. Kuprevich Str., 220084, Minsk</p></bio><email xlink:type="simple">lapina@iboch.by</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>Свиридов</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sviridov</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Свиридов Олег Васильевич – доктор химических наук, про- фессор, заведующий лабораторией</p><p>ул. Академика В. Ф. Купревича, 5/2, 220084, Минск</p></bio><bio xml:lang="en"><p>Sviridov Oleg V. – D. Sc. (Chemistry), Professor, Head of Laboratory</p><p>5/2, Academician V. F. Kuprevich Str., 220084, Minsk</p></bio><email xlink:type="simple">sviridov@iboch.by</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт биоорганической химии Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Bioorganic Chemistry of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Институт микробиологии Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Microbiology of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2024</year></pub-date><pub-date pub-type="epub"><day>30</day><month>11</month><year>2024</year></pub-date><volume>60</volume><issue>4</issue><fpage>314</fpage><lpage>325</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Серченя Т.С., Охремчук Е.В., Валентович Л.Н., Лапина В.С., Свиридов О.В., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Серченя Т.С., Охремчук Е.В., Валентович Л.Н., Лапина В.С., Свиридов О.В.</copyright-holder><copyright-holder xml:lang="en">Serchenya T.S., Akhremchuk K.U., Valentovich L.N., Lapina V.S., Sviridov O.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://vestichem.belnauka.by/jour/article/view/917">https://vestichem.belnauka.by/jour/article/view/917</self-uri><abstract><p>Разработаны и исследованы четыре модельные биоаналитические системы, специфичные к бактериям Salmonella enterica, в которых в результате полимеразной цепной реакции (ПЦР) продуцировался содержащий остатки биотина и флуоресцеина ампликон ДНК. Это позволило иммобилизовать ампликон в функционализиро- ванной твердой фазе и биоспецифически пометить хелатом европия в микропланшетах или золотыми наночастицами на хроматографической мембране. Количественная детекция модифицированной ДНК осуществлялась в системах иммуноанализа с времяразрешенной флуоресценцией Eu3+ (лантанидный иммунофлуоресцентный анализ, ЛИФМА, DELFIA) или с фотометрией окрашенной зоны на хроматографической полоске (ИХА). Разработаны и исследованы три пары праймеров для получения выбранных фрагментов гена invA, присутствующего в геномах всех патогенных сальмонелл. Установлена их пригодность для тест-систем. В микропланшетной системе ЛИФМА диапазон определяемых концентраций полученного ампликона ДНК составил 0,01–10,0 нМ, а предел обнаружения оказался равным 2 пМ. Предел визуальной детекции ампликонов ДНК в ИХА составил 0,05 нМ. Показана возможность проведения тестирования ампликонов без дополнительного выделения ДНК в чистом виде из реакционной смеси. Установлена высокая специфичность разработанных биоаналитических систем для детекции Salmonella enterica различных серотипов.</p></abstract><trans-abstract xml:lang="en"><p>Four model bioanalytical systems specific for Salmonella enterica have been developed and studied, in which a polymerase chain reaction (PCR) produced a DNA amplicon containing biotin and fluorescein residues. This enabled to immobilize the amplicon on a functionalized solid phase and to label it biospecifically with europium chelate in microplates or gold nanoparticles on a chromatographic membrane. Quantitative detection of the modified DNA was carried out in immunoassay systems by measuring the Eu3+ time-resolved fluorescence (dissociation-enhanced lanthanide fluorescence immunoassay, DELFIA) or by photometry of the colored zone on the chromatographic strip (LFA). Three pairs of primers were developed and examined to obtain selected fragments of the invA gene, which is present in the genomes of all pathogenic Salmonella enterica. The fragments proved to be suitable for the test systems. In the microplate DELFIA system, the concentration range of DNA amplicon quantification was found to be 0.01–10.0 nM, and a detection limit was 2 pM. The limit of DNA visual detection in LFA was 0.05 nM. The possibility of testing the amplicons without additional isolation of pure DNA from the reaction mixture was demonstrated. The high specificity of the developed bioanalytical systems for the detection of various Salmonella enterica serotypes was demonstrated.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>патогенные бактерии</kwd><kwd>Salmonella enterica</kwd><kwd>полимеразная цепная реакция</kwd><kwd>иммуноанализ с времяразрешенной флуориметрией</kwd><kwd>иммунохроматографический анализ</kwd></kwd-group><kwd-group xml:lang="en"><kwd>pathogenic bacteria</kwd><kwd>Salmonella enterica</kwd><kwd>polymerase chain reaction</kwd><kwd>dissociation-enhanced lanthanide fluorescence immunoassay</kwd><kwd>lateral flow assay</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">A comparison of standard cultural methods for the detection of foodborne Salmonella / J. Y. D’Aoust [et al.] // Int. J. 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