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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">Kazan medical journal</journal-id><journal-title-group><journal-title xml:lang="en">Kazan medical journal</journal-title><trans-title-group xml:lang="ru"><trans-title>Казанский медицинский журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0368-4814</issn><issn publication-format="electronic">2587-9359</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">8891</article-id><article-id pub-id-type="doi">10.17816/KMJ2018-404</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Theoretical and clinical medicine</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Теоретическая и клиническая медицина</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">Investigation of the correlation of allele polymorphism of renin-angiotensin system genes, nitric oxide synthase and folate cycle with the severity of ischemic stroke</article-title><trans-title-group xml:lang="ru"><trans-title>Исследование взаимосвязи аллельного полиморфизма генов ренин-ангиотензиновой системы, синтазы оксида азота и фолатного цикла с тяжестью ишемического инсульта</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Levashova</surname><given-names>O A</given-names></name><name xml:lang="ru"><surname>Левашова</surname><given-names>Ольга Анатольевна</given-names></name></name-alternatives><email>olga.lewashowa@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Baranova</surname><given-names>N I</given-names></name><name xml:lang="ru"><surname>Баранова</surname><given-names>Надежда Ивановна</given-names></name></name-alternatives><email>olga.lewashowa@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zolkornyaev</surname><given-names>I G</given-names></name><name xml:lang="ru"><surname>Золкорняев</surname><given-names>Искандэр Гусманович</given-names></name></name-alternatives><email>olga.lewashowa@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Penza Institute for Further Training of Physicians</institution></aff><aff><institution xml:lang="ru">Пензенский институт усовершенствования врачей</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2018-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2018</year></pub-date><volume>99</volume><issue>3</issue><issue-title xml:lang="en">VOL 99, NO3 (2018)</issue-title><issue-title xml:lang="ru">ТОМ 99, №3 (2018)</issue-title><fpage>404</fpage><lpage>408</lpage><history><date date-type="received" iso-8601-date="2018-05-28"><day>28</day><month>05</month><year>2018</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2018, Levashova O.A., Baranova N.I., Zolkornyaev I.G.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2018, Левашова О.А., Баранова Н.И., Золкорняев И.Г.</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="en">Levashova O.A., Baranova N.I., Zolkornyaev I.G.</copyright-holder><copyright-holder xml:lang="ru">Левашова О.А., Баранова Н.И., Золкорняев И.Г.</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/">http://creativecommons.org/licenses/by-nc-sa/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://kazanmedjournal.ru/kazanmedj/article/view/8891">https://kazanmedjournal.ru/kazanmedj/article/view/8891</self-uri><abstract xml:lang="en"><p><bold>Aim.</bold> To study the frequency of polymorphic gene variants encoding proteins of renin-angiotensin system [AGT Thr174Met (rs 4762), AGT Met235Thr (rs699), AGTR1 A1166C (rs5186)], endothelial factors [NOS3 C786T (rs2070744)], and folate cycle enzymes [MTHFR C677T (rs1801133)] in patients with various ischemic stroke severity.</p> <p><bold>Methods.</bold> 98 patients with ischemic stroke verified by magnetic resonance imaging and computed tomography scan of the brain, were examined. The severity of stroke was assessed by National Institutes of Health Stroke Scale. The allelic variants of genes were typified by polymerase chain reaction with the detection of amplification products in the «real time» mode.</p> <p><bold>Results.</bold> The analysis of genetic polymorphism frequency of renin-angiotensin system did not reveal statistically significant differences in the study groups. The polymorphism of NOSC786T gene in the study was also not associated with the severity of ischemic stroke. Among the studied polymorphic variants, only the C677T polymorphism of MTHFR gene was revealed to be reliably associated with severe course of acute cerebral ischemia.</p> <p><bold>Conclusion.</bold> C677T polymorphism of MTHFR gene is reliably associated with severe course of acute cerebral ischemia; carriage of 677T allele of MTHFR gene in the studied category of patients can cause an increased level of homocysteine and have an adverse effect on the course of acute cerebral ischemia.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Цель.</bold> Изучить частоту полиморфных вариантов ряда генов, кодирующих протеины различных звеньев ренин-ангиотензиновой системы [AGT Thr174Met (rs4762), AGT Met235Thr (rs699), AGTR1 A1166C (rs5186)], эндотелиальных факторов [NOS3 C786T (rs2070744)], ферментов фолатного цикла [MTHFR C677T (rs1801133)], у пациентов с ишемическим инсультом различной степени тяжести.</p> <p><bold>Методы.</bold> Обследованы 98 пациентов с ишемическим инсультом, верифицированным по результатам магнитно-резонансной и компьютерной томографии головного мозга. Тяжесть инсульта оценивали по шкале инсульта Национального института здоровья (NIHSS). Типирование аллельных вариантов генов проводили методом полимеразной цепной реакции с детекцией продуктов амплификации в режиме реального времени.</p> <p><bold>Результаты.</bold> Анализ частоты полиморфных генов ренин-ангиотензиновой системы не выявил статистически значимых различий в изучаемых группах пациентов. Полиморфизм гена NOSC786T в нашем исследовании также не ассоциировался с тяжестью ишемического инсульта. Среди изученных полиморфных вариантов только полиморфизм C677T гена MTHFR оказался достоверно связан с тяжёлым течением острой ишемии мозга.</p> <p><bold>Вывод.</bold> Полиморфизм C677T гена MTHFR достоверно связан с тяжёлым течением острой ишемии мозга; носительство аллеля 677Т гена MTHFR у изучаемой категории больных может обусловливать повышенный уровень гомоцистеина и оказывать неблагоприятное влияние на течение острой ишемии мозга.</p></trans-abstract><kwd-group xml:lang="en"><kwd>gene polymorphism</kwd><kwd>ischemic stroke</kwd><kwd>severity of disease</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>полиморфизм генов</kwd><kwd>ишемический инсульт</kwd><kwd>тяжесть заболевания</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Gusev E.I., Martynov M.Yu., Kamchatnov P.R. Ischemic stroke. Current state of the problem. Doktor.ru. 2013; (5): 2–7. 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