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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="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">neurojour</journal-id><journal-title-group><journal-title xml:lang="ru">Неврологический журнал имени Л.О. Бадаляна</journal-title><trans-title-group xml:lang="en"><trans-title>L.O. Badalyan Neurological Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2686-8997</issn><issn pub-type="epub">2712-794X</issn><publisher><publisher-name>ФГАУ «НМИЦ здоровья детей» Минздрава России</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.46563/2686-8997-2023-4-4-215-225</article-id><article-id custom-type="edn" pub-id-type="custom">narqpb</article-id><article-id custom-type="elpub" pub-id-type="custom">neurojour-115</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="ru"><subject>КЛИНИЧЕСКИЕ СЛУЧАИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL CASES</subject></subj-group></article-categories><title-group><article-title>Гипертрофическая кардиомиопатия и лактат-ацидоз у ребёнка с дефицитом ацил-КоА-дегидрогеназы-9: обзор литературы и клиническое наблюдение</article-title><trans-title-group xml:lang="en"><trans-title>Hypertrophic cardiomyopathy and lactic acidosis in a child with acyl-CoA dehydrogenase 9 deficiency. Review of the literature and clinical observation</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0890-7849</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гандаева</surname><given-names>Лейла Ахатовна</given-names></name><name name-style="western" xml:lang="en"><surname>Gandaeva</surname><given-names>Leila A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>К.м.н., ведущий науч. сотрудник, врач — детский кардиолог ФГАУ НМИЦ здоровья детей» Минздрава России, 119991, Москва</p><p>e-mail: dr.gandaeva@gmail.com</p></bio><bio xml:lang="en"><p>MD, PhD, pediatric cardiologist at the National Medical Research Center for Children’s Health, Moscow, 119991, Russian Federation</p><p>e-mail: dr.gandaeva@gmail.com</p></bio><email xlink:type="simple">dr.gandaeva@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0144-2885</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Басаргина</surname><given-names>Елена Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Basargina</surname><given-names>Elena N.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5978-854X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Давыдова</surname><given-names>Юлия И.</given-names></name><name name-style="western" xml:lang="en"><surname>Davydova</surname><given-names>Yulia I.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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/0009-0001-5545-8276</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бурыкина</surname><given-names>Юлия С.</given-names></name><name name-style="western" xml:lang="en"><surname>Burykina</surname><given-names>Yulia S.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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/0009-0001-6367-6185</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сильнова</surname><given-names>Ирина В.</given-names></name><name name-style="western" xml:lang="en"><surname>Silnova</surname><given-names>Irina V.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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/0000-0001-6648-2063</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Пушков</surname><given-names>Александр А.</given-names></name><name name-style="western" xml:lang="en"><surname>Pushkov</surname><given-names>Alexander A.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.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/0000-0003-4885-4171</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Савостьянов</surname><given-names>Кирилл В.</given-names></name><name name-style="western" xml:lang="en"><surname>Savostyanov</surname><given-names>Kirill V.</given-names></name></name-alternatives><email xlink:type="simple">noemail@neicon.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГАУ «Национальный медицинский исследовательский центр здоровья детей» Минздрава России</institution></aff><aff xml:lang="en"><institution>National Medical Research Center for Children’s Health</institution></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГАУ «Национальный медицинский исследовательский центр здоровья детей» Минздрава России; Клинический институт детского здоровья им. Н.Ф. Филатова ФГАОУ ВО «Первый Московский государственный медицинский университет им. И.М. Сеченова» Минздрава России</institution></aff><aff xml:lang="en"><institution>National Medical Research Center for Children’s Health; Filatov Clinical Institute of Children’s Health of the Sechenov First Moscow State Medical University</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>11</day><month>01</month><year>2024</year></pub-date><volume>4</volume><issue>4</issue><fpage>215</fpage><lpage>225</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Гандаева Л.А., Басаргина Е.Н., Давыдова Ю.И., Бурыкина Ю.С., Сильнова И.В., Пушков А.А., Савостьянов К.В., 2024</copyright-statement><copyright-year>2024</copyright-year><copyright-holder xml:lang="ru">Гандаева Л.А., Басаргина Е.Н., Давыдова Ю.И., Бурыкина Ю.С., Сильнова И.В., Пушков А.А., Савостьянов К.В.</copyright-holder><copyright-holder xml:lang="en">Gandaeva L.A., Basargina E.N., Davydova Y.I., Burykina Y.S., Silnova I.V., Pushkov A.A., Savostyanov K.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.neuro-journal.ru/jour/article/view/115">https://www.neuro-journal.ru/jour/article/view/115</self-uri><abstract><sec><title>Введение</title><p>Введение. Дефицит ацил-КоА дегидрогеназы 9 (дефицит митохондриального комплекса I) — аутосомно-рецессивное заболевание из гетерогенной группы нарушений митохондриального β-окисления жирных кислот, обусловленное мутациями в гене ACAD9. Заболевание характеризуется широким спектром клинических проявлений, наиболее распространёнными из которых являются метаболический ацидоз, гипертрофическая кардиомиопатия, мышечная гипотония и нарушение моторных навыков.</p><p>Цель исследования — описание клинического течения и особенностей ведения пациента с патогенным вариантом c.659C&gt;T (p.A220V) гена ACAD9.</p></sec><sec><title>Клиническое наблюдение</title><p>Клиническое наблюдение. Приведены подробные данные первого в России клинического наблюдения ребёнка с гомозиготной мутацией c.659C&gt;T (p.A220V) в гене ACAD9, диагностированного на базе кардиологического отделения ФГАУ «НМИЦ здоровья детей» Минздрава России. Проведены подробный анализ данных анамнеза, результатов клинических, лабораторных, инструментальных методов диагностики и молекулярно-генетического исследования, выполненного с использованием технологии высокопроизводительного секвенирования и прямого секвенирования по Сэнгеру. Описаны ранние маркеры заболевания и возможности комплексной медикаментозной терапии для предотвращения развития тяжёлых осложнений.  </p></sec><sec><title>Обсуждение</title><p>Обсуждение. Проведён анализ литературы, касающейся пациентов с мутациями в гене ACAD9. Представленный клинический случай демонстрирует важность своевременной диагностики заболевания и инициации комплексной терапии, направленной на коррекцию метаболических изменений и купирование симптомов хронической сердечной недостаточности.</p></sec><sec><title>Заключение</title><p>Заключение. Нарушение митохондриального β-окисления жирных кислот представляют собой гетерогенную группу наследственных болезней, в основе которых лежит патология митохондриального β-окисления и транспорта карнитина и жирных кислот в митохондрии. Особенностью данных заболеваний является мультисистемный характер поражения и прогрессирующее течение. В некоторых случаях первыми клиническими проявлениями могут быть различные нарушения со стороны сердечно-сосудистой системы (кардиомиопатия, нарушения ритма сердца), которые в неонатальном и раннем детском возрасте могут являться причиной летальных исходов. Раннее проведение молекулярно-генетических исследований позволяет точно установить диагноз и, соответственно, своевременно назначить комплексную терапию.</p><p>Соблюдение этических стандартов. Дизайн и протокол исследования соответствуют этическим принципам Хельсинкской декларации 1975 г., получено предварительное одобрение Комитета по исследованиям на людях и одобрение Этического комитета ФГАУ «НМИЦ здоровья детей» Минздрава России. Представителем пациента подписано информированное согласие на участие в исследовании и обработку персональных данных.</p></sec><sec><title>Участие авторов</title><p>Участие авторов: Гандаева Л.А. — концепция и дизайн исследования, написание текста, редактирование текста, утверждение окончательного варианта статьи;Басаргина Е.Н. — редактирование текста, утверждение окончательного варианта статьи;Давыдова Ю.И. — сбор и обработка материала, написание текста;Бурыкина Ю.С. — сбор и обработка материала, написание текста;Сильнова И.В. — сбор и обработка материала, написание текста;Пушков А.А. — сбор и обработка материала, редактирование текста;Савостьянов К.В. — концепция и дизайн исследования, редактирование текста, утверждение окончательного варианта статьи.Все соавторы — ответственность за целостность всех частей статьи.</p></sec><sec><title>Финансирование</title><p>Финансирование. Исследование не имело спонсорской поддержки.</p></sec><sec><title>Конфликт интересов</title><p>Конфликт интересов. Авторы данной статьи заявили об отсутствии финансовой поддержки и конфликта интересов, о которых необходимо сообщить.</p></sec><sec><title>Благодарность</title><p>Благодарность. Авторы благодарны семье пациента за поддержку нашего исследования. Авторы выражают благодарность директору ФГАУ «НМИЦ здоровья детей» Минздрава России доктору медицинских наук, профессору А.П. Фисенко за поддержку и техническую помощь в осуществлении данной работы. Авторы благодарят весь коллектив ФГАУ «НМИЦ здоровья детей» Минздрава России за возможность междисциплинарного подхода к ведению пациентов.</p></sec><sec><title>Поступила 14</title><p>Поступила 14.08.2023</p></sec><sec><title>Принята к печати 30</title><p>Принята к печати 30.09.2023</p></sec><sec><title>Опубликована 28</title><p>Опубликована 28.12.2023</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. Acyl-CoA dehydrogenase 9 deficiency (mitochondrial complex I deficiency) is an autosomal recessive disease from the heterogeneous group of disorders of mitochondrial β-oxidation of fatty acids caused by mutations in the ACAD9 gene. The disease is characterized by a wide range of clinical manifestations, the most common of which are metabolic acidosis, hypertrophic cardiomyopathy, muscle hypotonicity, and impaired motor skills. The article presents the first Russian clinical observation of a rare variant of hypertrophic cardiomyopathy with early debut in a patient with mitochondrial complex I deficiency caused by homozygous mutation c.659C&gt;T (p.A220V) in the ACAD9 gene and emphasizes the importance of early diagnosis of the disease and complex drug therapy to prevent the development of severe complications.</p></sec><sec><title>Objective</title><p>Objective: to describe the clinical course and management of a patient with the pathogenic c.659C&gt;T (p.A220V) variant of the ACAD9 gene.</p><p>Detailed analysis of anamnesis data, results of clinical, laboratory, instrumental diagnostic methods, and molecular genetic research performed using high-throughput sequencing and direct Sanger sequencing technology.</p><p>The article presents a literature review and detailed data on clinical observation of a child with homozygous c.659C&gt;T (p.A220V) mutation in the ACAD9 gene diagnosed on the basis of the cardiology department of the National Medical Research Center for Children’s Health. Early disease markers and possibilities of complex drug therapy to prevent the development of severe complications are described.</p></sec><sec><title>Conclusion</title><p>Conclusion. Disruption of mitochondrial beta-oxidation of fatty acids is a heterogeneous group of inherited diseases due to abnormal mitochondrial beta-oxidation and transport of carnitine and fatty acids in mitochondria. A feature of these diseases is the multisystem nature of the lesion and its progressive course. In some cases, the initial clinical manifestations may be various disorders of the cardiovascular system (cardiomyopathy, heart rhythm disturbances), which may cause death in neonatal period and early childhood. Early molecular genetic research provides accurate diagnosis and, accordingly, timely prescription of complex therapy.</p><p>Compliance with ethical standards. The study protocol conforms to the ethical guidelines of the 1975 Declaration of Helsinki as reflected in a priori approval by the institution’s human research committee and was approved by the Ethics. The design of the study was approved by the Ethics committee of the National Research Center for Children’s Health of the Russian Ministry of Health.</p></sec><sec><title>Contribution</title><p>Contribution: Gandaeva L.A. — concept and design of the study, collection and processing of material, text editing, approval of the final version of the article; Basargina E.N. — text editing; approval of the final version of the article; Davydova Yu.I. — collection and processing of material, text writing;  Burykina Yu.S. — collection and processing of material, text writing;Silnova I.V. — collection and processing of material, text writing;  Pushkov A.A. — collection and processing of material, text writing; Savostyanov K.V. — concept and design of the study, text editing, approval of the final version of the article.All co-authors are responsible for the  integrity of all parts of the manuscript and approval of its final version.</p></sec><sec><title>Conflict of interest</title><p>Conflict of interest. The authors declare no conflict of interest.</p></sec><sec><title>Acknowledgements</title><p>Acknowledgements. The study had no sponsorship. The authors are grateful to the patient’s family for their supporting our research. The authors would like to express their gratitude to Professor A.P. Fisenko, Director of the National Medical Research Center for Children’s Health of the Ministry of Health of the Russian Federation for his support and technical assistance in implementation of this work. The authors would like to thank the entire staff of the National Medical Research Center for Children’s Health for the opportunity of interdisciplinary approach to patient care.</p></sec><sec><title>Received</title><p>Received: August 14, 2023Accepted: September 30, 2023Published: December 28, 2023</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>дефицит ацил-КоА-дегидрогеназы 9-го типа</kwd><kwd>нарушение митохондриального β-окисления жирных кислот</kwd><kwd>гипертрофическая кардиомиопатия у детей</kwd><kwd>сердечная недостаточность</kwd><kwd>лактат-ацидоз</kwd><kwd>ACAD9</kwd></kwd-group><kwd-group xml:lang="en"><kwd>acyl-CoA dehydrogenase type 9 deficiency</kwd><kwd>disorders of mitochondrial beta-oxidation of fatty acids</kwd><kwd>hypertrophic cardiomyopathy in children</kwd><kwd>heart failure</kwd><kwd>lactic acidosis</kwd><kwd>ACAD9</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Нарушения митохондриального β-окисления жирных кислот: клинические рекомендации. 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