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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">ivm</journal-id><journal-title-group><journal-title xml:lang="ru">Международный вестник ветеринарии</journal-title><trans-title-group xml:lang="en"><trans-title>International Journal of Veterinary Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2072-2419</issn><publisher><publisher-name>SpbGUVM Publishing House</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.52419/issn2072-2419.2025.3.72</article-id><article-id custom-type="elpub" pub-id-type="custom">ivm-1791</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>ИНФЕКЦИОННЫЕ БОЛЕЗНИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>INFECTIOUS DISEASES</subject></subj-group></article-categories><title-group><article-title>Анализ полиморфизма гена LIPL32 патогенных лептоспир для разработки тест-системы с использованием полимеразной цепной реакции в режиме реального времени</article-title><trans-title-group xml:lang="en"><trans-title>Analysis of the polymorphism of the LIPL32 gene of pathogenic leptospira for the development of a real-time polymerase chain reaction test system</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3689-1442</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шангараев</surname><given-names>Р. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Shangaraev</surname><given-names>R. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. ветеринар. наук, науч. сотр. </p></bio><bio xml:lang="en"><p>Candidate of Veterinary Sciences, Researcher</p></bio><email xlink:type="simple">rafkat.shangaraev@mail.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/0000-0001-5279-9836</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Усольцев</surname><given-names>К. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Usoltsev</surname><given-names>K. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. ветеринар. наук, вед. науч. сотр. </p></bio><bio xml:lang="en"><p>Candidate of Veterinary Sciences, Leading Researcher</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4764-560X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хаертынов</surname><given-names>К. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Khaertynov</surname><given-names>K. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. биол. наук, вед. науч. сотр. </p></bio><bio xml:lang="en"><p>Candidate of Biological Sciences, Leading Researcher</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4446-4619</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Панкова</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Pankova</surname><given-names>E. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. биол. наук, вед. науч. сотр. </p></bio><bio xml:lang="en"><p>Candidate of Biological Sciences, Leading Researcher</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0707-2117</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Горбунова</surname><given-names>М. Е.</given-names></name><name name-style="western" xml:lang="en"><surname>Gorbunova</surname><given-names>M. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. биол. наук, науч. сотр. </p></bio><bio xml:lang="en"><p>Candidate of Biological Sciences, Researcher</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5669-1486</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хаммадов</surname><given-names>Н. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Khammadov</surname><given-names>N. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. биол. наук, вед. науч. сотр. </p></bio><bio xml:lang="en"><p>Candidate of Biological Sciences, Leading Researcher</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2763-8605</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Осянин</surname><given-names>К. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Osyanin</surname><given-names>K. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. биол. наук, вед. науч. сотр. </p></bio><bio xml:lang="en"><p>Candidate of Biological Sciences, Leading Researcher </p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБНУ «Федеральный центр токсикологической, радиационной и биологической безопасности»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal State Budgetary Scientific Institution «Federal Center for Toxicological, Radiation, and Biological safety»</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>07</day><month>01</month><year>2026</year></pub-date><volume>0</volume><issue>3</issue><fpage>72</fpage><lpage>83</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Шангараев Р.И., Усольцев К.В., Хаертынов К.С., Панкова Е.В., Горбунова М.Е., Хаммадов Н.И., Осянин К.А., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Шангараев Р.И., Усольцев К.В., Хаертынов К.С., Панкова Е.В., Горбунова М.Е., Хаммадов Н.И., Осянин К.А.</copyright-holder><copyright-holder xml:lang="en">Shangaraev R.I., Usoltsev K.V., Khaertynov K.S., Pankova E.N., Gorbunova M.E., Khammadov N.I., Osyanin K.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://vetjournal.spbguvm.ru/jour/article/view/1791">https://vetjournal.spbguvm.ru/jour/article/view/1791</self-uri><abstract><p>Целью данной работы являлось изучение полиморфизма гена LipL32 различных сероваров патогенных лептоспир, а также разработка прототипа тестсистемы для индикации данного гена с использованием метода полимеразной цепной реакции в режиме реального времени с оценкой его стабильности. Объектами исследования служили 245 нуклеотидных последовательностей гена LipL32 Leptospira interrogans, образцы ДНК лептоспир сероваров Pomona, Grippotyphosa, Canicola, Bataviae и Tarassovi. По результатам биоинформационного анализа 245 нуклеотидных последовательностей гена LipL32 установили, что данный ген является высококонсервативным участком генома возбудителя лептоспироза. Для индикации исследуемого патогена по данному гену методом ПЦР-РВ, определили маркерный локус (область липопротеина L32) размером 173 пар нуклеотидов. В пределах данного участка разработали олигонуклеотидные праймеры и зонд, которые по данным множественного выравнивания амплифицируемого локуса оказались идентичными для большинства анализируемых нуклеотидных последовательностей гена LipL32 L. interrogans. BLAST-анализ отсеквенированных нуклеотидных последовательностей патогенных леп тоспир сероваров Pomona, Grippotyphosa, Canicola, Bataviae и Tarassovi показал, что идентичность амплифицированного сконструированными олигонуклеотидами участка гена липопротеина L32 указанных выше изолятов с последовательностями ДНК возбудителя лептоспироза, сохраненных в базе данных NCBI, варьировала от 95,74 до 98,95 %. С использованием разработанных олигонуклеоидов и флуоресцентного зонда сконструирован прототип тест-системы для индикации патогенных лептоспир методом ПЦРРВ. Установлено, что специфичность представленного в настоящей работе тест- набора составила 100 %, а чувствительность может достигать 5·102 копий ДНК в одном мл исследуемого материала. Результат оценки стабильности опытного образца тест-системы показал, что коэффициенты вариации минимальных пороговых значений не превышают 10 %, таким образом компоненты набора устойчивы к длительному хранению.</p></abstract><trans-abstract xml:lang="en"><p>The purpose of this work was to study the polymorphism of the LipL32 gene of various pathogenic leptospira serovars, as well as to develop a prototype test system for the indication of this gene using the real-time polymerase chain reaction method with an assessment of its stability. The objects of the study were 245 nucleotide sequences of the LipL32 gene of Leptospira interrogans, DNA samples of leptospira serovars Pomona, Grippotyphosa, Canicola, Bataviae and Tarassovi. Based on the results of bioinformatic analysis of 245 nucleotide sequences of the LipL32 gene, it was established that this gene is a highly conserved region of the genome of the causative agent of leptospirosis. To indicate the pathogen under study for this gene by RT-PCR, a marker locus (lipoprotein L32 region) with a size of 173 nucleotide pairs was determined. Within this site, oligonucleotide primers and a probe were developed, which, according to multiple alignment of the amplified locus, turned out to be identical for most of the analyzed nucleotide sequences of the LipL32 L. interrogans gene. BLAST analysis of the sequenced nucleotide sequences of the pathogenic leptospira serovars Pomona, Grippotyphosa, Canicola, Bataviae and Tarassovi showed that the identity of the lipoprotein L32 gene region amplified by engineered oligonucleotides of the above isolates with DNA sequences of the causative agent of leptospirosis stored in the NCBI database ranged from 95.74 to 98.95%. Using the developed oligonucleotides and a fluorescent probe, a prototype test system for the detection of pathogenic leptospires by PCR-RV was constructed. It was found that the specificity of the test kit presented in this work was 100%, and the sensitivity could reach 5·102 copies of DNA per ml of the test material. The stability assessment of the test system showed that the variation coefficients of the minimum threshold values did not exceed 10%, indicating that the kit components were stable during long-term storage.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>лептоспироз</kwd><kwd>ген LipL32</kwd><kwd>BLAST-анализ</kwd><kwd>нуклеотидная последовательность</kwd><kwd>полимеразная цепная реакция в режиме реального времени</kwd><kwd>полиморфизм</kwd><kwd>секвенирование</kwd><kwd>стабильность</kwd><kwd>тест-система</kwd><kwd>диагностика</kwd></kwd-group><kwd-group xml:lang="en"><kwd>leptospirosis</kwd><kwd>LipL32 gene</kwd><kwd>nucleotide substitution</kwd><kwd>BLAST- analysis</kwd><kwd>nucleotide sequence</kwd><kwd>real-time polymerase chain reaction</kwd><kwd>polymorphism</kwd><kwd>sequencing</kwd><kwd>stability</kwd><kwd>test system</kwd><kwd>diagnosis</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">Ананьина, Ю. 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