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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">medjournal</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинский журнал</journal-title><trans-title-group xml:lang="en"><trans-title>Medical Journal</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1818-426X</issn><publisher><publisher-name>Белорусский государственный медицинский университет</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.51922/1818-426X.2022.3.155</article-id><article-id custom-type="elpub" pub-id-type="custom">medjournal-285</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>В ПОМОЩЬ ПРАКТИКУЮЩЕМУ ВРАЧУ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>TO HELP THE PRACTITIONER</subject></subj-group></article-categories><title-group><article-title>Неврологические проявления дефицита биотинидазы на примере клинического наблюдения у ребенка раннего возраста</article-title><trans-title-group xml:lang="en"><trans-title>Neurological manifestations of biotinidase deficiency (clinical case)</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Филипович</surname><given-names>Е. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Filipovich</surname><given-names>E. K.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зобикова</surname><given-names>О. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Zobikova</surname><given-names>O. L.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зиновик</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Zinovik</surname><given-names>A. V.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Прилуцкая</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Prylutskaya</surname><given-names>V. A.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Редуто</surname><given-names>В. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Reduto</surname><given-names>V. A.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Козорез</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Kozorez</surname><given-names>T. V.</given-names></name></name-alternatives><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff xml:lang="ru" id="aff-1"><institution>УО «Белорусский государственный медицинский университет»</institution><country>Belarus</country></aff><aff xml:lang="ru" id="aff-2"><institution>ГУ «Республиканский научно-практический центр «Мать и дитя»</institution><country>Belarus</country></aff><aff xml:lang="ru" id="aff-3"><institution>ГУ «Республиканский научно-практический центр оториноларингологии»</institution><country>Belarus</country></aff><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>22</day><month>06</month><year>2025</year></pub-date><volume>0</volume><issue>3</issue><fpage>155</fpage><lpage>160</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Филипович Е.К., Зобикова О.Л., Зиновик А.В., Прилуцкая В.А., Редуто В.А., Козорез Т.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Филипович Е.К., Зобикова О.Л., Зиновик А.В., Прилуцкая В.А., Редуто В.А., Козорез Т.В.</copyright-holder><copyright-holder xml:lang="en">Filipovich E.K., Zobikova O.L., Zinovik A.V., Prylutskaya V.A., Reduto V.A., Kozorez T.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://medjournal.ejournal.by/jour/article/view/285">https://medjournal.ejournal.by/jour/article/view/285</self-uri><abstract><p>Врожденный дефицит биотинидазы является редким врожденным нарушением метаболизма, которое чаще всего проявляется у новорожденных и детей раннего возраста. Так как активность фермента в нервной ткани низкая, она наиболее чувствительна и уязвима, что проявляется в первую очередь мышечной гипотонией, судорогами, атаксией, а также дермальными нарушениями. Клинически выделяют две формы дефицита биотинидазы, которые определяются остаточной активностью фермента: ранняя (глубокий дефицит), поздняя (частичный). Ведущими лабораторными тестами являются выявление у пациента метаболического ацидоза, исследование мочи на органические кислоты, низкая активность фермента, гипераммониемия, выявление мутаций при секвенировании гена BTD. Проанализированы особенности соматического статуса и неврологических нарушений при дефиците биотинидазы на примере клинического случая и обзора литературы. Ранняя диагностика и назначение терапии биотином играют важную роль в предотвращении прогрессирования заболевания и клинических признаков.</p></abstract><trans-abstract xml:lang="en"><p>Congenital deficiency of biotinidase is a rare congenital metabolic disorder that most often occurs in newborns and young children. Since the activity of the enzyme in the nervous tissue is low, it is the most sensitive and vulnerable, which is manifested primarily by muscle hypotension, convulsions, ataxia, and dermal disorders. Clinically, there are two forms of biotinidase deficiency, which are determined by the residual activity of the enzyme: early (deep deficiency), late (partial). The leading laboratory tests are the detection of metabolic acidosis in the patient, the study of urine for organic acids, low enzyme activity, hyperammonemia, and the detection of mutations in the sequencing of the BTD gene. The features of neurological disorders in biotinidase deficiency are analyzed on the example of a clinical case and a review of the literature. Early diagnosis and administration of biotin therapy play an important role in preventing disease progression and clinical signs.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>дети</kwd><kwd>дефицит биотинидазы</kwd><kwd>неврологические нарушения</kwd><kwd>биотин</kwd></kwd-group><kwd-group xml:lang="en"><kwd>children</kwd><kwd>biotinidase deficiency</kwd><kwd>neurological disorders</kwd><kwd>biotin</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">Михайлова, С. В., Захарова Е. Ю., Ильина Е. С., Петрухин А. С. Диагностика и лечение недостаточности биотинидазы у детей раннего возраста // Лечащий врач. – 2005. – № 6. – C. 79–82.</mixed-citation><mixed-citation xml:lang="en">Mikhaylova, S. V., Zakharova E. Yu., Il’ina E. 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