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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">Morphology</journal-id><journal-title-group><journal-title xml:lang="en">Morphology</journal-title><trans-title-group xml:lang="ru"><trans-title>Морфология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1026-3543</issn><issn publication-format="electronic">2949-2556</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">627332</article-id><article-id pub-id-type="doi">10.17816/morph.627332</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Original Study Articles</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">Changes in the pathomorphological condition of the myocardium in dysferlinopathy mice (Bla/J type)</article-title><trans-title-group xml:lang="ru"><trans-title>Патоморфологическая характеристика миокарда мышей с дисферлинопатией (линия Bla/J)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-5667-115X</contrib-id><contrib-id contrib-id-type="spin">9935-5416</contrib-id><name-alternatives><name xml:lang="en"><surname>Savelyeva</surname><given-names>Maria A.</given-names></name><name xml:lang="ru"><surname>Савельева</surname><given-names>Мария Анатольевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>savelyeva.mariaanat@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-3804-6245</contrib-id><contrib-id contrib-id-type="spin">2351-4096</contrib-id><name-alternatives><name xml:lang="en"><surname>Bardakov</surname><given-names>Sergey N.</given-names></name><name xml:lang="ru"><surname>Бардаков</surname><given-names>Сергей Николаевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine)</p></bio><bio xml:lang="ru"><p>канд. мед. наук</p></bio><email>epistaxis@mail.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4109-0105</contrib-id><contrib-id contrib-id-type="spin">5605-1140</contrib-id><name-alternatives><name xml:lang="en"><surname>Emelin</surname><given-names>Alexey M.</given-names></name><name xml:lang="ru"><surname>Емелин</surname><given-names>Алексей Михайлович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>eamar40rn@gmail.com</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-8389-3841</contrib-id><contrib-id contrib-id-type="spin">2957-1687</contrib-id><name-alternatives><name xml:lang="en"><surname>Deev</surname><given-names>Roman V.</given-names></name><name xml:lang="ru"><surname>Деев</surname><given-names>Роман Вадимович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Medicine), Assistant Professor</p></bio><bio xml:lang="ru"><p>канд. мед. наук, доцент</p></bio><email>romdey@gmail.com</email><xref ref-type="aff" rid="aff4"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">North-Western State Medical University named after I.I. Mechnikov</institution></aff><aff><institution xml:lang="ru">Северо-Западный государственный медицинский университет имени И.И. Мечникова</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">S.M. Kirov Military Medical Academy</institution></aff><aff><institution xml:lang="ru">Военно-медицинская академия имени С. М. Кирова</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">North-Western State Medical University named after I.I. Mechnikov</institution></aff><aff><institution xml:lang="ru">Северо-Западный государственный медицинский университет имени И. И. Мечникова</institution></aff></aff-alternatives><aff-alternatives id="aff4"><aff><institution xml:lang="en">Russian Research Center of Surgery named after Academician B.V. Petrovsky</institution></aff><aff><institution xml:lang="ru">Российский научный центр хирургии имени академика Б.В. Петровского</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2024-04-19" publication-format="electronic"><day>19</day><month>04</month><year>2024</year></pub-date><pub-date date-type="pub" iso-8601-date="2023-07-15" publication-format="electronic"><day>15</day><month>07</month><year>2023</year></pub-date><volume>161</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>9</fpage><lpage>18</lpage><history><date date-type="received" iso-8601-date="2024-02-21"><day>21</day><month>02</month><year>2024</year></date><date date-type="accepted" iso-8601-date="2024-04-02"><day>02</day><month>04</month><year>2024</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Эко-Вектор</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2026-07-15"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc-nd/4.0/</ali:license_ref></license></permissions><self-uri xlink:href="https://j-morphology.com/1026-3543/article/view/627332">https://j-morphology.com/1026-3543/article/view/627332</self-uri><abstract xml:lang="en"><p><bold>BACKGROUND:</bold> Dysferlinopathy is heritable progressive muscular dystrophy caused by DYSF mutation. Currently, although skeletal muscle pathology has been defined, only fragmentary and limited myocardium histopathology data are available.</p> <p><bold>AIM:</bold> The study aimed to analyze the pathomorphological status of the myocardium in Bla/J mice models of dysferlinopathy at different ages.</p> <p><bold>MATERIALS AND METHODS:</bold> Data from two experimental groups were analyzed: Bla/J mice with DYSF knockout on 3, 6, and 12 months old and control wild-type Balb/C mice aged 6 months. The expressions and patterns of dyeing of protein dysferlin in the immunofluorescent search method were analyzed. These were held such parameters of the histological characteristic of the myocardium of three dyeing protocols (hematoxylin and eosin, iron hematoxylin by Rego, and hematoxylin-basic fuchsin-picric acid by Lie), and morphometry of the parameters of the cardiomyocytes (length, width of cardiomyocytes, and nuclear perimeter).</p> <p><bold>RESULTS:</bold> The immunofluorescent search method revealed high levels of dysferlin in the myocardium of the control group. Statistical analysis showed significant differences between Bla/J and Balb/C mice: the increasing length and width of cardiomyocytes in dysferlinopathy by 49.9% ((95% confidence interval, 45.9–57.4) and 35.6 (95% confidence interval, 32.9–37.9)), respectively. Nucleus perimeter was significantly reduced in the dysferlinopathy group with disease duration of 6 months (by 23.9 (95% confidence interval, 20.2–27.5) compared with the group with disease duration of 3 months and by 18.8% (95% confidence interval, 8.5–19.7)) and the control group. Consequently, progressive hypertrophy of cardiomyocytes, increasing deformation in cardiomyocytes, intercalated disk destruction, hypoxia features, and necrosis indication were observed, resulting in fibrosis. A pattern of cardiomyocyte size reduction dependent on the aging process was observed.</p> <p><bold>CONCLUSIONS:</bold> Dysferlin deficiency leads to significant damage in the myocardium of Bla/J mice.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование.</bold> Дисферлинопатия — наследственная прогрессирующая мышечная дистрофия, причиной развития которой являются мутации в гене <italic>DYSF</italic>. Патоморфологические изменения поперечнополосатой скелетной мускулатуры детально описаны при снижении экспрессии дисферлина или при его полном отсутствии, в то время как данные о гистопатологии миокарда при дисферлинопатии фрагментарны и ограничены.</p> <p><bold>Цель исследования</bold> — оценить структурные изменения миокарда в разные возрастные периоды у мышей линии Bla/J, являющейся моделью дисферлинопатии.</p> <p><bold>Материалы и методы.</bold> Исследовали нокаутную по гену <italic>DYSF</italic> линию мышей Bla/J на сроках 3, 6 и 12 мес с момента рождения. Контрольную группу составили мыши линии Balb/C в возрасте 6 мес. Проводили иммунофлуоресцентную детекцию белка дисферлина в миокарде с оценкой его наличия и распределения в кардиомиоцитах. Анализировали структуру миокарда в парафиновых срезах с применением окраски гематоксилином и эозином, железным гематоксилином по Рего и ГОФПК по Ли. Провели морфометрию длины, толщины кардиомиоцитов и измерили периметр их ядер у мышей линии Bla/J.</p> <p><bold>Результаты.</bold> Дисферлин был выявлен только в миокарде мышей контрольной группы. При 95% доверительном интервале (ДИ) длина кардиомиоцитов мышей с нокаутом гена <italic>DYSF</italic> во всех возрастах была статистически значимо больше, чем у животных контрольной группы, максимально на 49,9 (45,9–57,4)%; толщина кардиомиоцитов — на 35,6 (32,9–37,9)%; периметр ядер кардиомиоцитов мышей линии Bla/J в возрасте 6 мес был меньше на 23,9 (20,2–27,5)%, чем у мышей линии Bla/J трёхмесячного возраста, и на 18,8 (8,5–19,7)% меньше по сравнению с контролем. У мутантных мышей выявлены прогрессирующая по сравнению с нормой гипертрофия кардиомиоцитов, нарастающая деформация кардиомиоцитов, разрушение их вставочных дисков, признаки гипоксии и некроза с исходом в фиброз. С увеличением возраста животных размер клеток миокарда уменьшался.</p> <p><bold>Заключение.</bold> Дефицит белка дисферлина приводит к значимым структурным изменениям миокарда у мышей линии Bla/J.</p></trans-abstract><kwd-group xml:lang="en"><kwd>heart</kwd><kwd>myocardium</kwd><kwd>Bla/J mice</kwd><kwd>dysferlinopathy</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>сердце</kwd><kwd>миокард</kwd><kwd>мыши линии Bla/J</kwd><kwd>дисферлинопатия</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Министерство науки и высшего образования РФ</institution></institution-wrap><institution-wrap><institution xml:lang="en">Ministry of Science and Higher Education of Russia</institution></institution-wrap></funding-source><award-id>075-15-2021-1346</award-id></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Straub V, Murphy A, Udd B; LGMD workshop study group. 229th ENMC international workshop: limb girdle muscular dystrophies — nomenclature and reformed classification Naarden, the Netherlands, 17–19 March 2017. 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