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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.v23i3.3075</article-id><article-id custom-type="elpub" pub-id-type="custom">ppharm-2844</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>КРАТКИЕ СООБЩЕНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>SHORT REPORT</subject></subj-group></article-categories><title-group><article-title>Врожденное нарушение гликозилирования Ia типа (синдром Жакена): клинический случай</article-title><trans-title-group xml:lang="en"><trans-title>Congenital Disorder of Glycosylation Type Ia (Jaeken Syndrome): A Case Report</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0002-2758-6729</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Руднева</surname><given-names>М. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Rudneva</surname><given-names>Mariya S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Руднева Мария Сергеевна - студентка Института материнства и детства.</p><p>117997, Москва, ул. Островитянова, д. 1, тел.: +7 (916) 445-25-00</p></bio><bio xml:lang="en"><p>Student.</p><p>1, Ostrovityanova Str., Moscow, 117997; +7 (916) 445-25-00</p></bio><email xlink:type="simple">mashaa.rudneva@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/0009-0005-7857-7605</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Милосердова</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Miloserdova</surname><given-names>Anastasiya S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Милосердова Анастасия Сергеевна – студентка.</p><p>Москва</p></bio><bio xml:lang="en"><p>Student.</p><p>Moscow</p></bio><email xlink:type="simple">tyonab@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/0009-0002-6811-4779</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Закирова</surname><given-names>О. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Zakirova</surname><given-names>Olesya S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Закирова Олеся Сергеевна - студентка.</p><p>Москва</p></bio><bio xml:lang="en"><p>Student.</p><p>Moscow</p></bio><email xlink:type="simple">ol.erunova@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/0009-0002-6645-3689</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мальцева</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Maltseva</surname><given-names>Mariya A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Мальцева Мария Андреевна – студентка.</p><p>Москва</p></bio><bio xml:lang="en"><p>Student.</p><p>Moscow</p></bio><email xlink:type="simple">mariamaltseva733@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/0009-0005-3984-4571</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сытова</surname><given-names>К. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Sytova</surname><given-names>Kristina S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сытова Кристина Сергеевна - студентка.</p><p>Москва</p></bio><bio xml:lang="en"><p>Student.</p><p>Moscow</p></bio><email xlink:type="simple">sytovakristina2003@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/0000-0002-4955-0121</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Турти</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Turti</surname><given-names>Tatiana V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Турти Татьяна Владимировна - д.м.н., профессор.</p><p>Москва</p></bio><bio xml:lang="en"><p>MD, PhD, Professor.</p><p>Moscow</p></bio><email xlink:type="simple">turtit@mail.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/0009-0009-4178-444X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Бакович</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Bakovich</surname><given-names>Elena A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Бакович Елена Анатольевна - к.м.н.</p><p>Москва</p></bio><bio xml:lang="en"><p>MD, PhD.</p><p>Moscow</p></bio><email xlink:type="simple">bakovich@nczd.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8717-2539</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Беляева</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Belyaeva</surname><given-names>Irina A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Беляева Ирина Анатольевна - д.м.н., профессор РАН.</p><p>Москва</p></bio><bio xml:lang="en"><p>MD, PhD, Professor of the RAS.</p><p>Moscow</p></bio><email xlink:type="simple">irinaneo@mail.ru</email><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Российский национальный исследовательский медицинский университет им. Н.И. Пирогова (Пироговский Университет)</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pirogov Russian National Research Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Российский национальный исследовательский медицинский университет им. Н.И. Пирогова (Пироговский Университет); НИИ педиатрии и охраны здоровья детей НКЦ №2 ФГБНУ «РНЦХ им. акад. Б.В. Петровского»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pirogov Russian National Research Medical University; Pediatrics and Child Health Research Institute in Petrovsky National Research Centre of Surgery</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Национальный медицинский исследовательский центр здоровья детей</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Medical Research Center of Children’s Health</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Российский национальный исследовательский медицинский университет им. Н.И. Пирогова (Пироговский Университет); Морозовская детская городская клиническая больница</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pirogov Russian National Research Medical University; Morozovskaya Children’s City Clinical Hospital</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>27</day><month>07</month><year>2026</year></pub-date><volume>23</volume><issue>3</issue><fpage>332</fpage><lpage>340</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Руднева М.С., Милосердова А.С., Закирова О.С., Мальцева М.А., Сытова К.С., Турти Т.В., Бакович Е.А., Беляева И.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Руднева М.С., Милосердова А.С., Закирова О.С., Мальцева М.А., Сытова К.С., Турти Т.В., Бакович Е.А., Беляева И.А.</copyright-holder><copyright-holder xml:lang="en">Rudneva M.S., Miloserdova A.S., Zakirova O.S., Maltseva M.A., Sytova K.S., Turti T.V., Bakovich E.A., Belyaeva I.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/2844">https://www.pedpharma.ru/jour/article/view/2844</self-uri><abstract><sec><title>Обоснование</title><p>Обоснование. Врожденное нарушение гликозилирования Ia типа (синдром Жакена; congenital disorder of glycosylation, type Ia; CDG-Ia) — это наследственное прогрессирующее заболевание с выраженным нейродегенеративным компонентом, обусловленное патогенными вариантами гена PMM2 (кодирует фермент фосфоманномутазу-2). На долю CDG-Ia приходится большинство зарегистрированных пациентов с врожденными нарушениями гликозилирования (62% в 2018 г.).</p><p>Описание клинического случая. Представлен клинический случай CDG-Ia у ребенка с прогрессирующей атаксией, нистагмом, задержкой психоречевого и моторного развития. Девочка, рожденная от третьей беременности, протекавшей на фоне острого энтерита на сроке 15 нед и острой респираторной вирусной инфекции на сроке 20 нед, вторых срочных родов (на 42-й нед). Ребенок родился в семье без наследственного отягощения, родителям на момент рождения девочки 37 и 38 лет. Заболевание дебютировало с рождения снижением сосательного рефлекса, отказом от груди и замедлением прибавки массы тела, в возрасте 1,5 мес к данным симптомам присоединился горизонтальный нистагм. Диагноз был выставлен на основании данных молекулярно-генетического обследования пробанда методом секвенирования нового поколения для исключения наследственных атаксий и изоэлектрического фокусирования трансферрина (выявлен аномальный спектр трансферринов: обнаружены аномальные дии асиаловые трансферрины (изоформы S2 и S0)), а также на основании магнитно-резонансной томографии головного мозга (прогрессирующая атрофия мозжечка в возрасте 11 мес).</p></sec><sec><title>Заключение</title><p>Заключение. Описан клинический случай CDG-Ia у ребенка в семье, где оба родителя являются носителями мутантных аллелей и имеют здорового ребенка. Несмотря на комплексное ведение пациента, зарегистрировано прогрессирующее течение заболевания, девочка имеют выраженную задержку психомоторного развития, отмечается клиника мультисистемного поражения внутренних органов. Остановить прогрессирование заболевания не представляется возможным ввиду генетического дефекта синтеза маннозы и гликопротеинов, являющихся важными компонентами большинства метаболических путей организма.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Background</title><p>Background. Congenital disorder of glycosylation type Ia (Jaeken syndrome; congenital disorder of glycosylation, type Ia; CDG-Ia) is a hereditary progressive disorder with a pronounced neurodegenerative component, caused by pathogenic variants in the PMM2 gene (encoding the enzyme phosphomannomutase-2). CDG-Ia accounts for the majority of registered patients with congenital disorders of glycosylation (62% in 2018). At least 1,000 patients with CDG caused by PMM2 gene mutations are known, but due to diagnostic difficulties, the true number of individuals with this condition is undoubtedly much higher.</p></sec><sec><title>Case Report</title><p>Case Report. We present a case report of CDG-Ia in a child with progressive ataxia, nystagmus, and delayed psycho-speech and motor development. The patient was a female infant, born from the third pregnancy, which was complicated by acute enteritis at 15 weeks of gestation and an acute respiratory viral infection at 20 weeks of gestation. Delivery was at term (42 weeks) and was the second childbirth. The child was born into a family with no history of hereditary disorders; the parents were 37 and 38 years old at the time of the girl’s birth. The disease manifested from birth with reduced sucking reflex, breast refusal, and slow weight gain. At 1.5 months of age, horizontal nystagmus was added to these symptoms. The diagnosis was established based on molecular genetic testing of the proband using next-generation sequencing to rule out hereditary ataxias, as well as transferrin isoelectric focusing (revealing an abnormal transferrin spectrum: abnormal diand asialotransferrins — isoforms S2 and S0), and magnetic resonance imaging of the brain (showing progressive cerebellar atrophy at 11 months of age).</p></sec><sec><title>Conclusion</title><p>Conclusion. We describe a case report of CDG-Ia in a child from a family in which both parents are carriers of mutant alleles and have a healthy child. Despite comprehensive patient management, progressive disease course was observed; the girl has severe psychomotor retardation and clinical signs of multisystem involvement of internal organs. Arresting disease progression is not feasible due to the underlying genetic defect in the synthesis of mannose and glycoproteins, which are essential components of most metabolic pathways in the body.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>врожденное нарушение гликозилирования</kwd><kwd>гликопротеины</kwd><kwd>манноза</kwd><kwd>PMM2-CDG</kwd><kwd>CDG-Ia</kwd><kwd>клинический случай</kwd></kwd-group><kwd-group xml:lang="en"><kwd>congenital disorder of glycosylation</kwd><kwd>glycoproteins</kwd><kwd>mannose</kwd><kwd>PMM2-CDG</kwd><kwd>CDG-Ia</kwd><kwd>case report</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Отсутствует</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">Piedade A, Francisco R, Jaeken J, et al. 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