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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="en"><front><journal-meta><journal-id journal-id-type="publisher-id">akusherstvo</journal-id><journal-title-group><journal-title xml:lang="en">Obstetrics, Gynecology and Reproduction</journal-title><trans-title-group xml:lang="ru"><trans-title>Акушерство, Гинекология и Репродукция</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2313-7347</issn><issn pub-type="epub">2500-3194</issn><publisher><publisher-name>IRBIS LLC</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.17749/2313-7347/ob.gyn.rep.2026.809</article-id><article-id custom-type="elpub" pub-id-type="custom">akusherstvo-2915</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="en"><subject>ОRIGINAL ARTICLES</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group></article-categories><title-group><article-title>Clinical and genetic predictors of great obstetrical syndromes following SARS-CoV-2 infection: the role of somatic background and the VDR gene rs2228570 polymorphism</article-title><trans-title-group xml:lang="ru"><trans-title>Клинико-генетические предикторы больших акушерских синдромов после перенесенной инфекции SARS-CoV-2: роль соматического фона и полиморфизма rs2228570 гена VDR</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1971-9141</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Ганеева</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Ganeeva</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Ганеева Альбина Валерьевна, к.м.н. </p><p>Scopus Author ID: 57370688600</p><p>WOS ResearcherID: GNP-3961-2022</p><p>420012 Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>Albina V. Ganeeva, MD, PhD in Medicine</p><p>Scopus Author ID: 57370688600</p><p>WOS ResearcherID: GNP-3961-2022</p><p>49 Butlerova Str., Kazan 420012</p></bio><email xlink:type="simple">ganeeva.a.v@yandex.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/0000-0002-7567-6043</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Габидуллина</surname><given-names>Р. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Gabidullina</surname><given-names>R. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Габидуллина Рушанья Исмагиловна, д.м.н., проф.</p><p>Scopus Author ID: 57215670415</p><p>WoS ResearcherID: GNN-0068-2022</p><p>420012 Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>Rushanya I. Gabidullina, MD, Dr Sci Med.</p><p>Scopus Author ID: 57215670415</p><p>WoS ResearcherID: GNN-0068-2022</p><p>49 Butlerova Str., Kazan 420012</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/0000-0003-1884-8248</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Капелюшник</surname><given-names>П. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Kapelyushnik</surname><given-names>P. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Капелюшник Полина Леонидовна </p><p>WoS ResearcherID: GNP-4642-2022</p><p>420012 Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>Polina L. Kapelyushnik, MD</p><p>WoS ResearcherID: GNP-4642-2022</p><p>49 Butlerova Str., Kazan 420012</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/0000-0001-7080-3878</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Валеева</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Valeeva</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Валеева Елена Валерьевна, к.б.н. </p><p>Scopus Author ID: 57195580617</p><p>WoS ResearcherID: W-8036-2019</p><p>420012 Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>Elena V. Valeeva, MD, PhD in Biology</p><p>Scopus Author ID: 57195580617</p><p>WoS ResearcherID: W-8036-2019</p><p>49 Butlerova Str., Kazan 420012</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Казанский государственный медицинский университет» Министерства здравоохранения Российской Федерации</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Kazan State Medical University, Ministry of Health of the Russian Federation</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>18</day><month>08</month><year>2026</year></pub-date><volume>20</volume><issue>4</issue><fpage>626</fpage><lpage>635</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Ganeeva A.V., Gabidullina R.I., Kapelyushnik P.L., Valeeva E.V., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Ганеева А.В., Габидуллина Р.И., Капелюшник П.Л., Валеева Е.В.</copyright-holder><copyright-holder xml:lang="en">Ganeeva A.V., Gabidullina R.I., Kapelyushnik P.L., Valeeva E.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.gynecology.su/jour/article/view/2915">https://www.gynecology.su/jour/article/view/2915</self-uri><abstract><sec><title>Introduction</title><p>Introduction. SARS-CoV-2 infection during gestation is associated with dramatically increased incidence of major obstetrical syndromes (МOS).</p></sec><sec><title>Aim</title><p>Aim: to evaluate a combined impact of COVID-19 contracted during the first or second trimester of pregnancy, baseline somatic history as well as the VDR gene rs2228570 polymorphism on МOS risk manifestation.</p></sec><sec><title>Materials and Methods</title><p>Materials and Methods. This study involved 299 pregnant women. Initially, the participants were allocated into two groups: the primary cohort comprised patients who underwent SARS-CoV-2 infection during the first or second trimester of gestation (Group 1, n = 146), while the control group consisted of pregnant women with no history of infectious pathology (Group 2, n = 153). Based on the pattern of gestational outcomes, the cohorts were stratified into subgroups: 1a (МOS manifestation, n = 40) and 1b (physiological outcomes, n = 106) within the infected cohort; 2a (МOS presence, n = 16) and 2b (uncomplicated gestation, n = 137) within the control group. Molecular genetic testing of the VDR gene rs2228570 locus was performed by real-time PCR, followed by statistical data processing.</p></sec><sec><title>Results</title><p>Results. COVID-19 contracted during pregnancy increased the overall МOS incidence by 2.6-fold (p = 0.0002), with predominance of severe preeclampsia (p = 0.018; odds ratio (OR) = 5.55). The manifestation of placenta-associated complications was linked to the presence of respiratory (p = 0.018) and digestive (p = 0.022) system diseases. The VDR gene rs2228570 locus did not influence the risk of SARS-CoV-2 infection during gestation (p = 0.297) but acted as a significant МOS predictor of placental decompensation in the post-COVID period (p = 0.0007). The presence of the AG genotype increased the risk of MOS development by 4.2-fold (95 % confidence interval (CI) = 1.47–11.81; p = 0.0056), whereas the GG genotype elevated it by 7.3-fold (95 % CI = 2.22–23.93; p = 0.0009).</p></sec><sec><title>Conclusion</title><p>Conclusion. The VDR gene rs2228570 polymorphism does not determine the risk of SARS-CoV-2 infection during pregnancy; however, under post-infectious conditions, the carriage of the G allele may serve as МOS predictor developing in concomitant respiratory and digestive system diseases.</p></sec></abstract><trans-abstract xml:lang="ru"><sec><title>Введение</title><p>Введение. Инфицирование вирусом SARS-CoV-2 в ходе гестации ассоциировано с критическим ростом частоты больших акушерских синдромов (БАС).</p></sec><sec><title>Цель</title><p>Цель: оценить сочетанное влияние перенесенной в I–II триместрах беременности новой коронавирусной инфекции, соматического фона и полиморфизма rs2228570 гена VDR на риски манифестации БАС.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Работа выполнена с участием 299 беременных, которые были распределены на 2 группы: основную когорту сформировали из 146 пациенток, перенесших SARS-CoV-2 в I или II триместре гестации (группа 1), группу контроля составили 153 беременные без инфекционной патологии в анамнезе (группа 2). На основании характера гестационных исходов, группы были разделены на подгруппы: 1а (манифестация БАС, n = 40) и 1b (физиологические исходы, n = 106) в инфекционной когорте; 2а (наличие БАС, n = 16) и 2b (неосложненное течение гестации, n = 137) в группе контроля. Молекулярно-генетическое тестирование локуса rs2228570 гена VDR выполнялось методом полимеразной цепной реакции (ПЦР) в реальном времени с последующей статистической обработкой результатов.</p></sec><sec><title>Результаты</title><p>Результаты. Перенесенный при беременности COVID-19 увеличивал общую частоту БАС в 2,6 раза (p = 0,0002) с доминированием тяжелой преэклампсии (p = 0,018; отношение шансов (ОШ) = 5,55). Манифестация плацента-ассоциированных осложнений была ассоциирована с наличием заболеваний дыхательной (p = 0,018) и пищеварительной (p = 0,022) систем. Локус rs2228570 гена VDR не влиял на риск инфицирования SARS-CoV-2 (p = 0,297) в ходе гестации, но выступал значимым предиктором плацентарной декомпенсации в постковидном периоде (p = 0,0007). Носительство генотипа AG повышало риск развития БАС в 4,2 раза (95 % доверительный интервал (ДИ) = 1,47–11,81; p = 0,0056), генотип GG – в 7,3 раза (95 % ДИ = 2,22–23,93; p = 0,0009).</p></sec><sec><title>Заключение</title><p>Заключение. Полиморфизм rs2228570 гена VDR не определяет риски инфицирования SARS-CoV-2 при беременности, однако в постковидном периоде носительство аллеля G может служить предиктором БАС, развивающихся на фоне сопутствующей патологии органов дыхания и пищеварения.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>большие акушерские синдромы</kwd><kwd>БАС</kwd><kwd>SARS-CoV-2</kwd><kwd>витамин D</kwd><kwd>ген VDR</kwd><kwd>rs2228570</kwd></kwd-group><kwd-group xml:lang="en"><kwd>major obstetrical syndromes</kwd><kwd>MOS</kwd><kwd>SARS-CoV-2</kwd><kwd>vitamin D</kwd><kwd>VDR gene</kwd><kwd>rs2228570</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена за счет гранта, предоставленного Академией наук Республики Татарстан образовательным организациям на поддержку планов развития кадрового потенциала в части стимулирования их научных и научно-педагогических работников к защите докторских диссертаций и выполнению научно-исследовательских работ Соглашение № 11/25-ПД-КазГМУ от 22.10.2025.</funding-statement><funding-statement xml:lang="en">This study was financed by the grant from the Academy of Sciences of the Republic of Tatarstan provided to educational organizations for supporting human resource development plans to encourage their scientific, research, and teaching staff to defend doctoral dissertations and conduct research projects (Agreement No. 11/25-PD-KazGMU dated October 22, 2025).</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">Nobrega G.M., Jones B.R., Mysorekar I.U. et al. 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