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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">Russian Journal of Infection and Immunity</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Infection and Immunity</journal-title><trans-title-group xml:lang="ru"><trans-title>Инфекция и иммунитет</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2220-7619</issn><issn publication-format="electronic">2313-7398</issn><publisher><publisher-name xml:lang="en">SPb RAACI</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">17712</article-id><article-id pub-id-type="doi">10.15789/2220-7619-TEO-17712</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</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">The effects of valacyclovir on polyomavirus infection (BKV) in kidney transplant recipients</article-title><trans-title-group xml:lang="ru"><trans-title>Влияние валацикловира на полиомавирусную инфекцию у реципиентов трансплантации почек</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Samadi</surname><given-names>K.</given-names></name><name xml:lang="ru"><surname>Самади</surname><given-names>К.</given-names></name></name-alternatives><address><country country="IR">Iran, Islamic Republic of</country></address><bio xml:lang="en"><p>Assistant Professor of Nephrology, Department of Internal Medicine, Faculty of Medicine</p></bio><bio xml:lang="ru"><p>ассистент кафедры внутренней медицины (нефрология), медицинский факультет</p></bio><email>jalambadaniz@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ghorbansabbagh</surname><given-names>M.</given-names></name><name xml:lang="ru"><surname>Горбансаббах</surname><given-names>М.</given-names></name></name-alternatives><address><country country="IR">Iran, Islamic Republic of</country></address><bio xml:lang="en"><p>Associate Professor of Nephrology, Department of Internal Medicine, Faculty of Medicine</p></bio><bio xml:lang="ru"><p>доцент кафедры внутренней медицины (нефрология), медицинский факультет</p></bio><email>jalambadaniz@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Raesi</surname><given-names>V.</given-names></name><name xml:lang="ru"><surname>Раези</surname><given-names>В.</given-names></name></name-alternatives><address><country country="IR">Iran, Islamic Republic of</country></address><bio xml:lang="en"><p>Assistant Professor of Nephrology, Department of Internal Medicine, Faculty of Medicine</p></bio><bio xml:lang="ru"><p>ассистент кафедры внутренней медицины (нефрология), медицинский факультет</p></bio><email>jalambadaniz@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Marouzi</surname><given-names>P.</given-names></name><name xml:lang="ru"><surname>Марузи</surname><given-names>П.</given-names></name></name-alternatives><address><country country="IR">Iran, Islamic Republic of</country></address><bio xml:lang="en"><p>Assistant Professor of Biostatistics, Department of Health Information Technology and Medical Records, School of Paramedical Sciences</p></bio><bio xml:lang="ru"><p>доцент кафедры медицинских информационных технологий медицинской документации (биостатистика), Школа парамедицинских наук</p></bio><email>jalambadaniz@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sharifipour</surname><given-names>F.</given-names></name><name xml:lang="ru"><surname>Шарифипур</surname><given-names>Ф.</given-names></name></name-alternatives><address><country country="IR">Iran, Islamic Republic of</country></address><bio xml:lang="en"><p>Associate Professor of Nephrology, Department of Internal Medicine, Faculty of Medicine</p></bio><bio xml:lang="ru"><p>доцент кафедры внутренней медицины (нефрология), медицинский факультет</p></bio><email>sharifipourf@mums.ac.ir</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Jalambadani</surname><given-names>Zeinab</given-names></name><name xml:lang="ru"><surname>Джаламбадани</surname><given-names>Зейнаб</given-names></name></name-alternatives><address><country country="IR">Iran, Islamic Republic of</country></address><bio xml:lang="en"><p>Assistant Professor of Health Education and Promotion, Department of Community Medicine, Faculty of Medicine; Assistant Professor of Health Education and Promotion, Non-Communicable Diseases Research Center, Faculty of Medicine</p></bio><bio xml:lang="ru"><p>доцент кафедры общественной медицины (санитарное просвещение и пропаганда здорового образа жизни), Медицинский факультет; доцент кафедры санитарного просвещения и пропаганды здорового образа жизни, Исследовательский центр неинфекционных заболеваний, Медицинский факультет</p></bio><email>jalambadaniz@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Sabzevar University of Medical Sciences</institution></aff><aff><institution xml:lang="ru">Сабзеварский университет медицинских наук</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Mashhad University of Medical Sciences</institution></aff><aff><institution xml:lang="ru">Мешхедский университет медицинских наук</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Birjand University of Medical Sciences</institution></aff><aff><institution xml:lang="ru">Бирджандский университет медицинских наук</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2024-10-07" publication-format="electronic"><day>07</day><month>10</month><year>2024</year></pub-date><pub-date date-type="pub" iso-8601-date="2025-07-08" publication-format="electronic"><day>08</day><month>07</month><year>2025</year></pub-date><volume>15</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>341</fpage><lpage>347</lpage><history><date date-type="received" iso-8601-date="2024-07-20"><day>20</day><month>07</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-09-09"><day>09</day><month>09</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Samadi K., Ghorbansabbagh M., Raesi V., Marouzi P., Sharifipour F., Jalambadani Z.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Самади К., Горбансаббах М., Раези В., Марузи П., Шарифипур Ф., Джаламбадани З.</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Samadi K., Ghorbansabbagh M., Raesi V., Marouzi P., Sharifipour F., Jalambadani Z.</copyright-holder><copyright-holder xml:lang="ru">Самади К., Горбансаббах М., Раези В., Марузи П., Шарифипур Ф., Джаламбадани З.</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://iimmun.ru/iimm/article/view/17712">https://iimmun.ru/iimm/article/view/17712</self-uri><abstract xml:lang="en"><p>Polyomavirus-associated nephropathy (PVAN) is one of the most serious infectious complications in allograft recipients, with the BK virus (BKV) being the primary etiologic agent. This study was conducted to investigate the efficacy of valacyclovir on BK virus (BKV) infection and viremia control in infected patients in Iran. This quasi-experimental study involved 21 Iranian patients. All kidney transplant recipients with a confirmed diagnosis of BKV infection based on renal biopsy and PCR were administered standard therapy (reduced doses of immunosuppressive drugs) with or without valacyclovir at a one-gram dose twice daily for one month. After collecting the data, the data was analyzed using SPSS 23. The K-S test confirmed the normality of the quantitative data. Chi-square for trend, independent-t, and Fisher’s exact tests were used to examine group homogeneity in terms of socio-demographic characteristics. Before the intervention, a t-test was used to compare mean scores among the groups; and repeated measures independent sample test, pair sample test, chi square test and ANOVA. The significance level of p &lt; 0.05 was considered for all tests. The mean creatinine level, mean GFR (Glomerular Filtration Rate) level, and median viral load in the serum were not significantly different between the two groups at the time of graft rejection diagnosis. One month after treatment, the serum viral load decreased in 90.9% of patients in the intervention group and 50% of patients in the control group, with the difference being statistically significant (p = 0.038). Also, in the two-month review, the results showed that the reduction of the virus serum load level was observed in 81.8% of patients in the intervention group and 40% of patients in the control group, and this difference was statistically significant (p = 0.049). Mean age, body mass index, and transplant duration were comparable between the two groups. Neither creatinine nor GFR levels differed significantly between the two groups after the intervention (p = 0.557 and p = 0.387). Valacyclovir can effectively reduce the serum viral load in BKV-infected kidney transplant recipients. This reduction, however, is not accompanied by an improvement in renal function or prevention of rejection.</p></abstract><trans-abstract xml:lang="ru"><p>Нефропатия, ассоциированная с полиомавирусом (ПВАН), является одним из самых серьезных инфекционных осложнений у реципиентов аллотрансплантата, причем основным этиологическим агентом является вирус BK (BKV). Настоящее исследование было проведено с целью изучения эффективности валацикловира при BKV-инфекции и контроле виремии у инфицированных пациентов в Иране. В поведенном квазиэкспериментальном исследовании приняли участие 21 пациент из Ирана. Всем реципиентам почечного трансплантата с подтвержденным диагнозом инфекции BKV на основе биопсии почки и ПЦР назначалась стандартная терапия (сниженные дозы иммунодепрессантов) с валацикловиром в дозе 1 г 2 раза в день в течение 1 месяца или без него. Анализ полученных данных был проведен с помощью программы SPSS 23. Тест K-S подтвердил нормальность количественных распределения данных. Для изучения однородности группы по социально-демографическим характеристикам использовались методы хи-квадрат для тренда, независимый t-критерии и точный метод Фишера. Перед вмешательством использовался t-тест для сравнения средних баллов среди групп; проведена повторная оценка независимого выборочного теста, парного выборочного теста, критерия хи-квадрат и дисперсионного анализа. Для всех тестов был установлен уровень достоверности p &lt; 0,05. Средний уровень креатинина, средний уровень скорости клубочковой фильтрации (СКФ) и медианная вирусная нагрузка в сыворотке существенно не разичались между двумя группами на момент постановки диагноза отторжения трансплантата. Через месяц после лечения вирусная нагрузка в сыворотке статистически достоверно снизилась у 90,9% пациентов в группе вмешательства и у 50% пациентов в контрольной группе (p = 0,038). Кроме того, в ходе двухмесячного мониторинга показано, что достоверное снижение уровня вирусной нагрузки в сыворотке наблюдалось у 81,8% пациентов в группе вмешательства и у 40% пациентов в контрольной группе (p = 0,049). Средний возраст, индекс массы тела и продолжительность трансплантации были сопоставимы между двумя группами. Уровни креатинина и уровни СКФ не различались существенно между двумя группами после вмешательства (p = 0,557 и p = 0,387). Валацикловир может эффективно снижать вирусную нагрузку в сыворотке у реципиентов почечного трансплантата, инфицированных BKV. Однако это снижение не сопровождается улучшением функции почек или предотвращением отторжения.</p></trans-abstract><kwd-group xml:lang="en"><kwd>kidney transplant</kwd><kwd>polyomavirus infection</kwd><kwd>valacyclovir</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>трансплантация почки</kwd><kwd>полиомавирусная инфекция</kwd><kwd>валацикловир</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Binet I., Nickeleit V., Hirsch H.H., Prince O., Dalquen P., Gudat F., Mihatsch M.J., Thiel G. Polyomavirus disease under new immunosuppressive drugs: a cause of renal graft dysfunction and graft loss. Transplantation, 1999, vol. 67, no. 6, pp. 918–922. doi: 10.1097/00007890-199903270-00022</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Boan P., Hewison C., Swaminathan R., Irish A., Warr K., Sinniah R., Pryce T.M., Flexman J. 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