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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">Neuromuscular Diseases</journal-id><journal-title-group><journal-title xml:lang="en">Neuromuscular Diseases</journal-title><trans-title-group xml:lang="ru"><trans-title>Нервно-мышечные болезни</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2222-8721</issn><issn publication-format="electronic">2413-0443</issn><publisher><publisher-name xml:lang="en">Publishing House ABV Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">715</article-id><article-id pub-id-type="doi">10.17650/2222-8721-2026-16-2-49-59</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL REPORTS</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">Clinical experience of treating 28 patients with Duchenne muscular dystrophy with the exon 45 skipping drug casimersen</article-title><trans-title-group xml:lang="ru"><trans-title>Клинический опыт лечения 28 пациентов с прогрессирующей мышечной дистрофией Дюшенна препаратом для пропуска 45-го экзона касимерсеном</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0426-6861</contrib-id><name-alternatives><name xml:lang="en"><surname>Agafonova</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Агафонова</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mityaus@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8876-7462</contrib-id><name-alternatives><name xml:lang="en"><surname>Artemyeva</surname><given-names>S. B.</given-names></name><name xml:lang="ru"><surname>Артемьева</surname><given-names>С. Б.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mityaus@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2635-2752</contrib-id><name-alternatives><name xml:lang="en"><surname>Vlodavets</surname><given-names>D. V.</given-names></name><name xml:lang="ru"><surname>Влодавец</surname><given-names>Д. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mityaus@gmail.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9562-3774</contrib-id><name-alternatives><name xml:lang="en"><surname>Kuzenkova</surname><given-names>L. M.</given-names></name><name xml:lang="ru"><surname>Кузенкова</surname><given-names>Л. М.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mityaus@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1752-2521</contrib-id><name-alternatives><name xml:lang="en"><surname>Minaycheva</surname><given-names>L. I.</given-names></name><name xml:lang="ru"><surname>Минайчева</surname><given-names>Л. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mityaus@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2115-985X</contrib-id><name-alternatives><name xml:lang="en"><surname>Mikhaylova</surname><given-names>S. V.</given-names></name><name xml:lang="ru"><surname>Михайлова</surname><given-names>С. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mityaus@gmail.com</email><xref ref-type="aff" rid="aff4"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-1017-9610</contrib-id><name-alternatives><name xml:lang="en"><surname>Petlina</surname><given-names>E. Y.</given-names></name><name xml:lang="ru"><surname>Петлина</surname><given-names>Е. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mityaus@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6415-156X</contrib-id><name-alternatives><name xml:lang="en"><surname>Podkletnova</surname><given-names>T. V.</given-names></name><name xml:lang="ru"><surname>Подклетнова</surname><given-names>Т. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mityaus@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-9697-500X</contrib-id><name-alternatives><name xml:lang="en"><surname>Popovich</surname><given-names>S. G.</given-names></name><name xml:lang="ru"><surname>Попович</surname><given-names>С. Г.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mityaus@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1545-2320</contrib-id><name-alternatives><name xml:lang="en"><surname>Seitova</surname><given-names>G. N.</given-names></name><name xml:lang="ru"><surname>Сеитова</surname><given-names>Г. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mityaus@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8381-8793</contrib-id><name-alternatives><name xml:lang="en"><surname>Uvakina</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Увакина</surname><given-names>Е. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mityaus@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Scientific Research Institute of Medical Genetics, Tomsk National Research Center of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт медицинской генетики ФГБНУ «Томский национальный исследовательский медицинский центр»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Yu.E. Veltischev Research and Clinical Institute for Pediatrics and Pediatric Surgery, N. I. Pirogov Russian National Research Medical University</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский клинический институт педиатрии и детской хирургии им. акад. Ю. Е. Вельтищева ФГАОУ ВО «Российский национальный исследовательский медицинский университет им. Н. И. Пирогова» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">National Medical Research Center for Children’s Health, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">ФГАУ «Национальный медицинский исследовательский центр здоровья детей» Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Russian Children’s Clinical Hospital, N. I. Pirogov Russian National Research Medical University, Ministry of Health of Russia</institution></aff><aff><institution xml:lang="ru">Российская детская клиническая больница – филиал ФГАОУ ВО «Российский национальный исследовательский медицинский университет им. Н. И. Пирогова» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-09-21" publication-format="electronic"><day>21</day><month>09</month><year>2026</year></pub-date><volume>16</volume><issue>2</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>49</fpage><lpage>59</lpage><history><date date-type="received" iso-8601-date="2026-09-21"><day>21</day><month>09</month><year>2026</year></date><date date-type="accepted" iso-8601-date="2026-09-21"><day>21</day><month>09</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Agafonova А.А., Artemyeva S.B., Vlodavets D.V., Kuzenkova L.M., Minaycheva L.I., Mikhaylova S.V., Petlina E.Y., Podkletnova T.V., Popovich S.G., Seitova G.N., Uvakina E.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Агафонова А.А., Артемьева С.Б., Влодавец Д.В., Кузенкова Л.М., Минайчева Л.И., Михайлова С.В., Петлина Е.Ю., Подклетнова Т.В., Попович С.Г., Сеитова Г.Н., Увакина Е.В.</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Agafonova А.А., Artemyeva S.B., Vlodavets D.V., Kuzenkova L.M., Minaycheva L.I., Mikhaylova S.V., Petlina E.Y., Podkletnova T.V., Popovich S.G., Seitova G.N., Uvakina E.V.</copyright-holder><copyright-holder xml:lang="ru">Агафонова А.А., Артемьева С.Б., Влодавец Д.В., Кузенкова Л.М., Минайчева Л.И., Михайлова С.В., Петлина Е.Ю., Подклетнова Т.В., Попович С.Г., Сеитова Г.Н., Увакина Е.В.</copyright-holder><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://nmb.abvpress.ru/jour/article/view/715">https://nmb.abvpress.ru/jour/article/view/715</self-uri><abstract xml:lang="en"><p>Background.<bold> </bold>Duchenne muscular dystrophy (DMD) is an irreversible, progressive fatal genetic disorder caused by the absence of functional dystrophin protein in muscle due to mutations in the <italic>DMD </italic>gene. Exon-skipping therapy for DMD aims to increase the amount of functionally active protein dystrophin. Casimersen, a drug for skipping exon 45, is indicated for patients with certain deletions. Clinical studies have confirmed an increase in dystrophin levels and improved motor activity in patients with DMD treated with casimersen.</p> <p>Aim. To present the experience of treating patients with DMD who were eligible for exon 45 skipping therapy.</p> <p>Materials and methods. Twenty-eight patients with DMD who received exon 45 skipping therapy were observed. Patients were assessed for functional status, motor tests (Six-Minute Walk Test, North Star Ambulatory Assessment) dynamics, and respiratory function with dynamic assessment of functional vital capacity.</p> <p>Results. Most outpatients showed stabilization of their condition with preservation of the ability to move independently, improvement or stability in functional (Six-Minute Walk Test, North Star Ambulatory Assessment) and timed test indicators, as well as stabilization of upper limb function and absence of progression of respiratory function decline in non-ambulatory patients.</p> <p>Conclusion. The safety and tolerability of casimersen therapy were generally good in all patients with DMD in our sample. All patients who initiated casimersen therapy in the early outpatient stage remained in this stage at the analysis date.</p></abstract><trans-abstract xml:lang="ru"><p>Введение. Прогрессирующая мышечная дистрофия (ПМД) Дюшенна – необратимое смертельное генетическое заболевание, обусловленное отсутствием полноценного белка дистрофина в мышцах из-за мутаций в гене<italic> DMD</italic>. Патогенетическая терапия ПМД Дюшенна методом экзон-скиппинга (пропуска определенных экзонов) направлена на увеличение количества функционально активного дистрофина. Препарат для пропуска 45-го экзона касимерсен показан пациентам с определенными локализациями делеций. Клинические исследования подтвердили увеличение количества дистрофина и улучшение двигательной активности у пациентов с ПМД Дюшенна на фоне терапии касимерсеном.</p> <p>Цель исследования – представить опыт лечения пациентов с ПМД Дюшенна, подходящих для терапии методом пропуска 45-го экзона.</p> <p>Материалы и методы. Под наблюдением находилось 28 пациентов с ПМД Дюшенна, получавшие терапию методом пропуска 45-го экзона. Всем пациентам проводилась оценка функционального состояния, динамики показателей двигательных тестов (6-минутной ходьбы и теста «Северная звезда»), респираторной функции с оценкой функциональной жизненной емкости легких в динамике.</p> <p>Результаты. У большинства амбулаторных пациентов отмечались стабилизация состояния с сохранением способности к самостоятельному передвижению, улучшение или стабилизация показателей функциональных (теста 6-минутной ходьбы и теста «Северная звезда») и временны́х тестов, а у неамбулаторных пациентов – стабилизация функции верхних конечностей и отсутствие прогрессирования снижения респираторной функции.</p> <p>Выводы. Безопасность и переносимость терапии касимерсеном в целом были хорошими у всех пациентов с ПМД в нашей выборке. Все пациенты, начавшие терапию касимерсеном на ранней амбулаторной стадии, сохранили этот статус на дату анализа.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Duchenne muscular dystrophy</kwd><kwd>dystrophin</kwd><kwd>exon deletion</kwd><kwd>exon skipping</kwd><kwd>antisense oligonucleotides</kwd><kwd>casimersen</kwd><kwd>functional test</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>прогрессирующая мышечная дистрофия Дюшенна</kwd><kwd>дистрофин</kwd><kwd>делеция экзонов</kwd><kwd>экзон-скиппинг</kwd><kwd>антисмысловые олигонуклеотиды</kwd><kwd>касимерсен</kwd><kwd>функциональный тест</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Клинические рекомендации «Прогрессирующая мышечная дистрофия Дюшенна. Прогрессирующая мышечная дистрофия Беккера». Министерство здравоохранения Российской Федерации, 2025. Доступно по: https://cr.minzdrav.gov.ru/view-cr/773_1#doc_g. 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