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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">ppharm</journal-id><journal-title-group><journal-title xml:lang="ru">Педиатрическая фармакология</journal-title><trans-title-group xml:lang="en"><trans-title>Pediatric pharmacology</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1727-5776</issn><issn pub-type="epub">2500-3089</issn><publisher><publisher-name>Издательство «ПедиатрЪ»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.15690/pf.v19i1.2352</article-id><article-id custom-type="elpub" pub-id-type="custom">ppharm-2129</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>КЛИНИЧЕСКИЙ СЛУЧАЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CASE REPORT</subject></subj-group></article-categories><title-group><article-title>Редкий случай синдрома Моркио (мукополисахаридоз IVА типа): трудности диагностического поиска и лечения</article-title><trans-title-group xml:lang="en"><trans-title>Rare Case of Morquio Syndrome (Mucopolysaccharidosis Type IVA): Difficulties of Diagnostic Search and Management</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9049-0450</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Съемщикова</surname><given-names>Ю. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Semschikova</surname><given-names>Yulia P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Съемщикова Юлия Павловна - кандидат медицинских наук, доцент кафедры педиатрии; eLibrary SPIN: 1536-0612.</p><p>664003, Иркутск, ул. Красного восстания, д. 1</p></bio><bio xml:lang="en"><p>MD, PhD; eLibrary SPIN: 1536-0612</p><p>Irkutsk </p></bio><email xlink:type="simple">jsemshikova@mail.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/0000-0003-2313-897X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Козлов</surname><given-names>Ю. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozlov</surname><given-names>Yurii A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Козлов Юрий Андреевич - доктор медицинских наук, профессор; eLibrary SPIN: 3682-0832.</p><p>664003, Иркутск, ул. Красного восстания, д. 1</p></bio><bio xml:lang="en"><p>MD, PhD, Professor; eLibrary SPIN: 3682-0832.</p><p>1, Krasnogo Vosstaniya Str., 664003, Irkutsk</p></bio><email xlink:type="simple">yu.kozlov@ismu.baikal.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Яковлев</surname><given-names>А. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Yakovlev</surname><given-names>Andrei B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Яковлев Андрей Борисович</p><p>Иркутск</p></bio><bio xml:lang="en"><p>MD</p><p>Irkutsk</p></bio><email xlink:type="simple">an.iakowlev2010@yandex.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шинкарева</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Shinkareva</surname><given-names>Vera M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>eLibrary SPIN: 7327-3587</p><p>Иркутск</p></bio><bio xml:lang="en"><p>eLibrary SPIN: 7327-3587</p><p>Irkutsk </p></bio><email xlink:type="simple">pulmon.dep@igodkb.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/0000-0002-2799-5680</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Барзунова</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Barzunova</surname><given-names>Tatyana V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>eLibrary SPIN: 5104-0481</p><p>Иркутск</p></bio><bio xml:lang="en"><p>MD; eLibrary SPIN: 5104-0481</p><p>Irkutsk </p></bio><email xlink:type="simple">barzunova_t@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Манькова</surname><given-names>Н. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Manjkova</surname><given-names>Natalia I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иркутск</p></bio><bio xml:lang="en"><p>MD</p><p>Irkutsk </p></bio><email xlink:type="simple">natalja_manjkova@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Балакирев</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Balakirev</surname><given-names>Evgenii A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иркутск</p></bio><bio xml:lang="en"><p>MD</p><p>Irkutsk </p></bio><email xlink:type="simple">igodkbobl@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Иркутский государственный медицинский университет Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Irkutsk State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Иркутская государственная областная детская клиническая больница</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Irkutsk State Regional Children’s Clinical Hospital</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Городская Ивано-Матренинская детская клиническая больница</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ivano-Matreninsky City Children’s Clinical Hospital</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>04</day><month>03</month><year>2022</year></pub-date><volume>19</volume><issue>1</issue><fpage>39</fpage><lpage>44</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Съемщикова Ю.П., Козлов Ю.А., Яковлев А.Б., Шинкарева В.М., Барзунова Т.В., Манькова Н.И., Балакирев Е.А., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Съемщикова Ю.П., Козлов Ю.А., Яковлев А.Б., Шинкарева В.М., Барзунова Т.В., Манькова Н.И., Балакирев Е.А.</copyright-holder><copyright-holder xml:lang="en">Semschikova Y.P., Kozlov Y.A., Yakovlev A.B., Shinkareva V.M., Barzunova T.V., Manjkova N.I., Balakirev E.A.</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.pedpharma.ru/jour/article/view/2129">https://www.pedpharma.ru/jour/article/view/2129</self-uri><abstract><sec><title>Обоснование</title><p>Обоснование. Настоящий клинический случай представляет практический интерес ввиду недостаточности эпидемио логических и клинических данных в России и мире, трудностей диагностики на начальном этапе болезни, а также малого опыта ферментозаместительной терапии мукополисахаридоза IVА типа (МПС IVА).</p><p>Описание клинического случая. Диагностика МПС IV (синдром Моркио) в возрасте 11 лет основывалась на характерных внешних проявлениях прогрессирующего характера, таких как грудопоясничный кифосколиоз, коксартроз с ограничением как активных, так и пассивных движений. При проведении энзимодиагностики в высушенных пятнах крови выявлено резкое снижение активности N-ацетилгалактозамин-6-сульфатазы — 0,01 мкМ/л/ч, что характерно для МПС IVA. При проведении прямого автоматического секвенирования в гене GALNS были выявлены патогенные нуклеотидные варианты в компаунд-гетерозиготном состоянии: c.143T&gt;G; p.(Val48Gly) и c.697G&gt;A; p.(Asp233Asn), что позволило установить диагноз МПС IVА. Начата ферментозаместительная терапия элосульфазой альфа согласно протоколу. Учитывая значительные изменения в опорно-двигательном аппарате, ожидаемый терапевтический эффект — стабилизация и отсутствие прогрессирования болезни — может быть достоверно зафиксирован не ранее чем через 8–12 мес.</p></sec><sec><title>Заключение</title><p>Заключение. Своевременная диагностика МПС позволяет использовать ферментозаместительную терапию в возможно более ранние сроки и тем самым избежать необратимых осложнений заболевания.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Background</title><p>Background. This clinical case is of practical interest due to the lack of epidemiological and clinical data in Russian Federation and worldwide, difficulties in diagnosis at the disease onset, as well as little experience in enzyme replacement therapy for mucopolysaccharidosis type IVA (MPS IVA).</p><p>Clinical case description. MPS IV (Morquio syndrome) diagnosis at the age of 11 was based on typical progressive external signs such as thoracolumbar scoliosis, coxarthrosis with restriction of both active and passive movements. Enzymodiagnostics in dried blood spots has shown dramatic decrease of N-acetylgalactosamine-6-sulfatase activity — 0.01 μM/l/h specific to MPS IVA. Direct automatic sequencing of the GALNS gene has revealed pathogenic nucleotide variants in the compound heterozygous state: c.143T&gt;G; p(Val48Gly) and c.697G&gt;A; p.(Asp233Asn). That allowed us to establish MPS IVA diagnosis. Enzyme replacement therapy with elosulfase alpha was started according to the protocol. According to significant changes in the musculoskeletal system, the expected therapeutic effect (stabilization and no disease progression) can be achieved not earlier than after 8–12 months.</p></sec><sec><title>Conclusion</title><p>Conclusion. Timely MPS diagnosis allows us to implement enzyme replacement therapy at the earliest possible time and thereby to avoid non-reversible complications of the disease itself.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>клинический случай мукополисахаридоза</kwd><kwd>лизосомные болезни накопления</kwd><kwd>синдром Моркио А</kwd><kwd>врожденный дефект метаболизма кератансульфата</kwd><kwd>хондроитин-6-сульфата</kwd><kwd>остеохондродистрофия</kwd><kwd>спондилоэпифизарная дисплазия</kwd><kwd>элосульфаза</kwd><kwd>ферментозаместительная терапия</kwd><kwd>дети раннего возраста</kwd></kwd-group><kwd-group xml:lang="en"><kwd>mucopolysaccharidosis clinical case</kwd><kwd>lysosomal storage diseases</kwd><kwd>Morquio syndrome А</kwd><kwd>congenital defect of keratin sulfate metabolism</kwd><kwd>chondroitin 6-sulphate</kwd><kwd>osteochondrodystrophy</kwd><kwd>spondiloepiphysial dysplasia</kwd><kwd>elosulfase</kwd><kwd>enzyme replacement therapy</kwd><kwd>infants</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Не указан</funding-statement><funding-statement xml:lang="en">Not specified</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Атлас редких болезней / под ред. 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