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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">Problems of Virology</journal-id><journal-title-group><journal-title xml:lang="en">Problems of Virology</journal-title><trans-title-group xml:lang="ru"><trans-title>Вопросы вирусологии</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0507-4088</issn><issn publication-format="electronic">2411-2097</issn><publisher><publisher-name xml:lang="en">Central Research Institute for Epidemiology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">16626</article-id><article-id pub-id-type="doi">10.36233/0507-4088-232</article-id><article-id pub-id-type="edn">lnmvih</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL RESEARCHES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</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">Efficacy of first-line ART regimens based on tenofovir in HIV-infected patients with pre-existing A62V mutation in reverse transcriptase</article-title><trans-title-group xml:lang="ru"><trans-title>Эффективность схем АРТ первой линии на основе TDF у ВИЧ-инфицированных пациентов с предсуществующей мутацией A62V в обратной транскриптазе</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3110-0843</contrib-id><name-alternatives><name xml:lang="en"><surname>Ozhmegova</surname><given-names>Ekaterina N.</given-names></name><name xml:lang="ru"><surname>Ожмегова</surname><given-names>Екатерина Никитична</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, Researcher at the Laboratory of Leukemia Viruses of the Department of the Institute of Virology named after. D.I. Ivanovsky</p></bio><bio xml:lang="ru"><p>канд. биол. наук, научный сотрудник лаборатории вирусов лейкозов Института вирусологии им. Д.И. Ивановского</p></bio><email>ozhmegova.eka@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kuznetsova</surname><given-names>Anna I.</given-names></name><name xml:lang="ru"><surname>Кузнецова</surname><given-names>Анна Игоревна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, Head of the Laboratory of Leukemia Viruses of the Department of the Institute of Virology named after. D.I. Ivanovsky</p></bio><bio xml:lang="ru"><p>канд. биол. наук, заведующая лабораторией вирусов лейкозов Института вирусологии им. Д.И. Ивановского</p></bio><email>a-myznikova@list.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6787-9345</contrib-id><name-alternatives><name xml:lang="en"><surname>Lebedev</surname><given-names>Aleksey V.</given-names></name><name xml:lang="ru"><surname>Лебедев</surname><given-names>Алексей Владимирович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, Researcher at the Laboratory of Leukemia Viruses of the Department of the Institute of Virology named after. D.I. Ivanovsky</p></bio><bio xml:lang="ru"><p>канд. биол. наук, научный сотрудник лаборатории вирусов лейкозов подразделения Институт вирусологии им. Д.И. Ивановского</p></bio><email>lebedevalesha236@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9180-9846</contrib-id><name-alternatives><name xml:lang="en"><surname>Antonova</surname><given-names>Anastasia A.</given-names></name><name xml:lang="ru"><surname>Антонова</surname><given-names>Анастасия Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>PhD, Researcher at the Laboratory of Leukemia Viruses of the Department of the Institute of Virology named after. D.I. Ivanovsky</p></bio><bio xml:lang="ru"><p>канд. биол. наук, научный сотрудник лаборатории вирусов лейкозов Института вирусологии им. Д.И. Ивановского</p></bio><email>anastaseika95@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4150-2280</contrib-id><name-alternatives><name xml:lang="en"><surname>Kim</surname><given-names>Kristina V.</given-names></name><name xml:lang="ru"><surname>Ким</surname><given-names>Кристина Вячеславовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Junior Researcher at the Laboratory of Leukemia Viruses of the Department of the Institute of Virology named after. D.I. Ivanovsky</p></bio><bio xml:lang="ru"><p>младший научный сотрудник лаборатории вирусов лейкозов Института вирусологии им. Д.И. Ивановского</p></bio><email>kimsya99@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4792-8928</contrib-id><name-alternatives><name xml:lang="en"><surname>Munchak</surname><given-names>Yana M.</given-names></name><name xml:lang="ru"><surname>Мунчак</surname><given-names>Яна Михайловна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Junior Researcher at the Laboratory of Leukemia Viruses of the Department of the Institute of Virology named after. D.I. Ivanovsky</p></bio><bio xml:lang="ru"><p>младший научный сотрудник лаборатории вирусов лейкозов Института вирусологии им. Д.И. Ивановского</p></bio><email>yanka.zabavnaya@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6221-5678</contrib-id><name-alternatives><name xml:lang="en"><surname>Tumanov</surname><given-names>Alexander S.</given-names></name><name xml:lang="ru"><surname>Туманов</surname><given-names>Александр Сергеевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Researcher at the Laboratory of Leukemia Viruses of the Department of the Institute of Virology named after. D.I. Ivanovsky</p></bio><bio xml:lang="ru"><p>научный сотрудник лаборатории вирусов лейкозов Института вирусологии им. Д.И. Ивановского</p></bio><email>desep@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-7912-4270</contrib-id><name-alternatives><name xml:lang="en"><surname>Kazennova</surname><given-names>Elena V.</given-names></name><name xml:lang="ru"><surname>Казеннова</surname><given-names>Елена Валерьевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>D. Sc. (Biology), Leading Researcher at the Laboratory of Leukemia Viruses of the Department of the Institute of Virology named after. D.I. Ivanovsky</p></bio><bio xml:lang="ru"><p>д-р биол. наук, ведущий научный сотрудник лаборатории вирусов лейкозов Института вирусологии им. Д.И. Ивановского</p></bio><email>kazennova@rambler.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">National Research Center for Epidemiology and Microbiology named after the Honorary Academician N.F. Gamaleya of the Russian Ministry of Health</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный исследовательский центр эпидемиологии и микробиологии им. почетного академика Н.Ф. Гамалеи» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2024-07-05" publication-format="electronic"><day>05</day><month>07</month><year>2024</year></pub-date><volume>69</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>231</fpage><lpage>240</lpage><history><date date-type="received" iso-8601-date="2024-02-21"><day>21</day><month>02</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2024, Ozhmegova E.N., Kuznetsova A.I., Lebedev A.V., Antonova A.A., Kim K.V., Munchak Y.M., Tumanov A.S., Kazennova E.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2024, Ожмегова Е.Н., Кузнецова А.И., Лебедев А.В., Антонова А.А., Ким К.В., Мунчак Я.М., Туманов А.С., Казеннова Е.В.</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="en">Ozhmegova E.N., Kuznetsova A.I., Lebedev A.V., Antonova A.A., Kim K.V., Munchak Y.M., Tumanov A.S., Kazennova E.V.</copyright-holder><copyright-holder xml:lang="ru">Ожмегова Е.Н., Кузнецова А.И., Лебедев А.В., Антонова А.А., Ким К.В., Мунчак Я.М., Туманов А.С., Казеннова Е.В.</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/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://virusjour.crie.ru/jour/article/view/16626">https://virusjour.crie.ru/jour/article/view/16626</self-uri><abstract xml:lang="en"><p><bold>Introduction.</bold> The amino acid substitution A62V in reverse transcriptase was identified as a mutation correlated with virologic failure in patients on first-line therapy including tenofovir (TDF) and tenofovir alafenamide (TAF). A62V is a typically polymorphic mutation in HIV-1 sub-subtype A6, which is the most widespread virus variant in Russia.</p> <p><bold>Materials and methods.</bold> The European EuResist (EIDB) database was queried to form two equivalent groups of patients: group 1 ‒ patients with A62V at baseline treated with TDF or TAF on the first-line therapy, group 2 ‒ patients without A62V at baseline treated with TDF or TAF on the first-line therapy. Each group included 23 patients.</p> <p><bold>Results.</bold> There was no statistical difference between the two groups in virologic efficacy in 4, 12, and 24 weeks after the start of antiretroviral therapy (ART) and in the frequency of virologic failures.</p> <p><bold>Conclusion</bold>. This study has some limitations, and the exact role of A62V in the efficacy of the first-line ART based on tenofovir deserves further investigation.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Введение.</bold> A62V в обратной транскриптазе была идентифицирована как мутация, коррелирующая с вирусологической неудачей у пациентов, получавших терапию первой линии, включая тенофовир (TDF) или тенофовир алафенамид (TAF). A62V представляет собой типично полиморфную мутацию суб-субтипа А6 ВИЧ-1, который является наиболее распространенным вариантом вируса в России.</p> <p><bold>Материалы и методы.</bold> По результатам запроса к общеевропейской базе данных EuResist (EIDB) были сформированы две эквивалентные группы пациентов: 1-я группа ‒ пациенты с A62V на исходном уровне, получавшие TDF или TAF в терапии первой линии; 2-я группа ‒ пациенты без A62V на исходном уровне, получавшие TDF или TAF в терапии первой линии. В каждую группу входило по 23 пациента.</p> <p><bold>Результаты.</bold> Статистической разницы между двумя группами по вирусологической эффективности через 4, 12 и 24 нед после начала антиретровирусной терапии (АРТ) и по частоте вирусологических неудач не выявлено.</p> <p><bold>Заключение.</bold> Проведенное исследование имело некоторые ограничения, в связи с чем роль A62V в эффективности АРТ первой линии на основе TDF нуждается в уточнении и заслуживает дальнейшего изучения.</p></trans-abstract><kwd-group xml:lang="en"><kwd>HIV-1</kwd><kwd>A62V</kwd><kwd>reverse transcriptase</kwd><kwd>first-line ART regimen</kwd><kwd>TDF/TAF</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>ВИЧ-1</kwd><kwd>A62V</kwd><kwd>обратная транскриптаза</kwd><kwd>схема АРТ первого ряда</kwd><kwd>TDF/TAF</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="en">Russian Science Foundation</institution></institution-wrap><institution-wrap><institution xml:lang="ru">Российский научный фонд</institution></institution-wrap></funding-source><award-id>№ 23–15-00027</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Stanford University HIV Drug Resistance Database. 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