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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">medgen</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинская генетика</journal-title><trans-title-group xml:lang="en"><trans-title>Medical Genetics</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2073-7998</issn><publisher><publisher-name>Publishing House «Genius Media» LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25557/2073-7998.2026.04.56-61</article-id><article-id custom-type="elpub" pub-id-type="custom">medgen-3436</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>КРАТКОЕ СООБЩЕНИЕ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>BRIEF REPORT</subject></subj-group></article-categories><title-group><article-title>Поиск генов риска ишемического инсульта путем анализа сингулярных матриц неравновесия по сцеплению на импутированных генотипических данных</article-title><trans-title-group xml:lang="en"><trans-title>The search for risky genes of ischemic stroke by the analysis of singular linkage disequilibrium matrix on imputed genotypic data</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>Хворых</surname><given-names>Г. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Khvorykh</surname><given-names>G. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>123182, г. Москва, пл. Академика Курчатова, д. 1 </p></bio><bio xml:lang="en"><p>1 Akademika Kurchatova sq., Moscow, 123182 </p></bio><email xlink:type="simple">gennady.khvorykh@gmail.com</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>Лимборская</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Limborska</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>123182, г. Москва, пл. Академика Курчатова, д. 1</p><p>115522, г. Москва, ул. Москворечье, д. 1  </p></bio><bio xml:lang="en"><p>1 Akademika Kurchatova sq., Moscow, 123182 </p><p>1 Moskvorechye st, Moscow,115522 </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>Хрунин</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Khrunin</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>123182, г. Москва, пл. Академика Курчатова, д. 1 </p></bio><bio xml:lang="en"><p>1 Akademika Kurchatova sq., Moscow, 123182 </p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Национальный исследовательский центр «Курчатовский институт»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National research centre «Kurchatov Institute»</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Национальный исследовательский центр «Курчатовский институт»; Медико-генетический научный центр имени академика Н.П. Бочкова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National research centre «Kurchatov Institute»; Research Centre for Medical Genetics</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>10</day><month>05</month><year>2026</year></pub-date><volume>25</volume><issue>4</issue><fpage>56</fpage><lpage>61</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Хворых Г.В., Лимборская С.А., Хрунин А.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Хворых Г.В., Лимборская С.А., Хрунин А.В.</copyright-holder><copyright-holder xml:lang="en">Khvorykh G.V., Limborska S.A., Khrunin A.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.medgen-journal.ru/jour/article/view/3436">https://www.medgen-journal.ru/jour/article/view/3436</self-uri><abstract><p>В полногеномных ассоциативных исследованиях различают одномаркерные и многомаркерные подходы. При использовании одномаркерных методов анализируют каждый однонуклеотидный полиморфизм (SNP) отдельно, что позволяет быстро выявлять генетические маркеры, связанные с фенотипом. Многомаркерные методы учитывают комбинации SNP, что повышает мощность тестов и общую информативность анализа, хотя и увеличивает объём вычислений. Ранее мы предложили разбивать матрицу неравновесия по сцеплению на сингулярные подматрицы, используя определитель матрицы как меру корреляции SNP в группе. Применив этот подход к генотипам представителей Западной Европы (4929 больных ишемическим инсультом, 652 индивида контрольной группы, 883749 SNP), мы идентифицировали гены-кандидаты заболевания, которые не были выявлены одномаркерными методами. В данной работе мы повторно применили этот метод к той же выборке индивидов, но с использованием в 10 раз большего количества SNP, полученных путем обогащения исходных панелей маркеров с помощью импутации. Результаты исследования показали применимость метода определителя для анализа больших наборов SNP, в том числе полученных с помощью импутации, и позволили предположить возможную роль нейрогенеза в развитии ишемического инсульта.</p></abstract><trans-abstract xml:lang="en"><p>In genome-wide association studies, single-marker and multi-marker approaches are distinguished. Single-marker methods analyze each single nucleotide polymorphism (SNP) individually, which allows for rapid identification of genetic markers associated with a phenotype. Multi-marker methods consider combinations of SNPs, which increases the power of tests and the overall informative value of the analysis, although it also increases the computational load. Previously, we proposed breaking down the linkage disequilibrium matrix into singular submatrices, using the matrix determinant as a measure of SNP correlation within a group. By applying this approach to the genotypes of individuals from Western Europe (4929 patients with ischemic stroke, 652 control individuals, 883,749 SNPs), we identified candidate genes for the disease that were not detected by single-marker methods. In this work, we reapplied this method to the same sample of individuals but using 10 times more SNPs obtained by enriching the original marker panels through imputation. The study results demonstrated the applicability of the determinant method for analyzing large SNP datasets, including those obtained via imputation, and suggested a potential role of neurogenesis in the development of ischemic stroke.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ишемический инсульт</kwd><kwd>неравновесие по сцеплению</kwd><kwd>однонуклеотидный полиморфизм</kwd><kwd>определитель</kwd><kwd>импутация</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ischemic stroke</kwd><kwd>linkage disequilibrium</kwd><kwd>single nucleotide polymorphism</kwd><kwd>determinant</kwd><kwd>imputation</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Исследование выполнено при финансовой поддержке гранта РНФ № 23-14-00131.</funding-statement><funding-statement xml:lang="en">This research was supported by the Russian Science Foundation, grant number 23-14-00131.</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">Khvorykh G., Khrunin A. 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