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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">vfumed</journal-id><journal-title-group><journal-title xml:lang="ru">Вестник Северо-Восточного федерального университета имени М.К. Аммосова. Vestnik of North-Eastern Federal University. Серия «Медицинские науки. Medical Sciences»</journal-title><trans-title-group xml:lang="en"><trans-title>Vestnik of North-Eastern Federal University. Medical Sciences</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2587-5590</issn><publisher><publisher-name>Северо-Восточный федеральный университет имени М.К. Аммосова</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.25587/2587-5590-2025-4-96-105</article-id><article-id custom-type="elpub" pub-id-type="custom">vfumed-396</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>МЕДИКО-БИОЛОГИЧЕСКИЕ НАУКИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>HEALTH SCIENCES</subject></subj-group></article-categories><title-group><article-title>Сравнительное исследование аминокислотного профиля мочи при формировании нДСТ у детей младшего школьного и подросткового возраста</article-title><trans-title-group xml:lang="en"><trans-title>A comparative study of the amino acid profile of urine during the development of undifferentiated connective tissue dysplasia (UCTD) in primary school-aged and adolescent children</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>Нохсорова</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Nokhsorova</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Нохсорова Мария Артемовна, старший преподаватель кафедры нормальной и патологической физиологии медицинского института</p><p>г. Якутск, ул. Ойунского, 27</p><p>тел: +7-924-663-09-55</p></bio><bio xml:lang="en"><p>Nokhsorova Maria Artemovna, Senior lecturer, Department of Normal and Pathological Physiology, Institute of Medicine</p><p>Yakutsk</p></bio><email xlink:type="simple">mnokhsorova@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>Борисова</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Borisova</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Борисова Наталья Владимировна, доктор медицинских наук, заведующая кафедрой нормальной и патологической физиологии медицинского института</p><p>г. Якутск, ул. Ойунского, 27</p><p>тел:+7-924-166-96-83</p></bio><bio xml:lang="en"><p>Borisova Natalia Vladimirovna, Dr. Sci. (Medicine), Head of the Department of Normal and Pathological Physiology, Institute of Medicine</p><p>Yakutsk</p></bio><email xlink:type="simple">borinat@yandex.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>Аммосова</surname><given-names>А. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Ammosova</surname><given-names>A. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аммосова Аэлита Михайловна, кандидат медицинских наук, доцент кафедры пропедевтики детских болезней медицинского института</p><p>г. Якутск, ул. Ойунского, 27</p><p>тел: +7-914-103-99-44</p></bio><bio xml:lang="en"><p>Ammosova Aelita Mikhailovna, Cand. Sci. (Medicine), Associate Professor, Department of Propaedeutics of Childhood Diseases, Institute of Medicine</p><p>Yakutsk</p></bio><email xlink:type="simple">aelmma@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Северо-Восточный федеральный университет им. М.К. Аммосова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>M. K. Ammosov North-Eastern Federal University</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>29</day><month>12</month><year>2025</year></pub-date><volume>0</volume><issue>4</issue><fpage>96</fpage><lpage>105</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Нохсорова М.А., Борисова Н.В., Аммосова А.М., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Нохсорова М.А., Борисова Н.В., Аммосова А.М.</copyright-holder><copyright-holder xml:lang="en">Nokhsorova M.A., Borisova N.V., Ammosova A.M.</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.smnsvfu.ru/jour/article/view/396">https://www.smnsvfu.ru/jour/article/view/396</self-uri><abstract><p>Взаимосвязь  между  аминокислотами  мочи  и  патофизиологическими  механизмами  формирования нДСТ у детей разных возрастов все еще остается актуальным для ранней диагностики. Цель исследования – выявить этапы формирования недифференцированной формы ДСТ у детей раннего школьного (7–10 лет) и подросткового (11–15 лет) возраста путем определения аминокислотного состава мочи. Проведено сравнительное исследование аминокислотного профиля мочи детей младшего школьного (7–10 лет) и подросткового возраста (11–16 лет) с недифференцированной дисплазией соединительной ткани (нДСТ). Все дети проживают в Республике Саха (Якутия). У детей младшего школьного возраста по мере усугубления нарушений соединительной ткани (СТ) (от 1 степени ко 2-3 степени нДСТ) было выявлено повышенное содержание не только биомаркеров нарушений СТ, таких как 5-оксипролина и гидроксипролина, но и аминокислот, таких как глицин, пролин, серин и треонин, принимающих участие в реакциях гидроксилирования и синтеза белков межклеточного матрикса, что может свидетельствовать о раннем нарушении аминокислотного обмена, лежащего в основе нарушений, связанных с соединительной тканью. Установлены группы аминокислот, которые подверглись наибольшим изменениям у детей разного возраста с нДСТ: аминокислоты, связанные с метаболизмом коллагена (глицин, пролин, гидроксипролин и 5-оксипролин), разветвлённые аминокислоты (валин, лейцин, изолейцин), кислые аминокислоты (аспартат, глутамат) и аминокислоты ароматического ряда (фенилаланин, тирозин). Результаты исследования вносят определенный вклад в развитие современных представлений об особенностях формирования адаптивных реакций организма, проживающего в экстремальных условиях среды обитания.</p></abstract><trans-abstract xml:lang="en"><p>The relationship between urinary amino acids and the pathophysiological mechanisms of undifferentiated connective  tissue  dysplasia  (UCTD)  development  in  children  of  different  ages  remains  relevant  for  early diagnosis. The aim of the study was to identify the stages of development of undifferentiated CTD in early schoolage children (7–10 years) and adolescents (11–15 years) by determining the amino acid composition of urine. A comparative study of the urine amino acid proﬁle was conducted in children with undifferentiated connective tissue dysplasia (UCTD) of primary school age (7–10 years) and adolescents (11–16 years) living in the Sakha Republic (Yakutia). In primary school-aged children, as connective tissue (CT) disorders worsened (from grade 1 to grades 2-3 uCTD), elevated levels of not only CT disorder biomarkers such as 5-hydroxyproline and hydroxyproline were detected, but also amino acids such as glycine, proline, as well as serine and threonine, which participate in hydroxylation reactions and the synthesis of extracellular matrix proteins. This may indicate an early disturbance of amino acid metabolism underlying connective tissue disorders. The following groups of amino acids were identiﬁed that underwent the greatest changes in children of different ages with uCTD: amino acids associated with collagen metabolism (glycine, proline, hydroxyproline, and 5-hydroxyproline), branched-chain amino acids (valine, leucine, isoleucine), acidic amino acids (aspartate, glutamate), and aromatic amino acids (phenylalanine, tyrosine). The results of the study make a deﬁnite contribution to the development of modern ideas about the peculiarities of the formation of adaptive reactions of an organism living in extreme environmental conditions.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>соединительная ткань</kwd><kwd>аминокислотный профиль</kwd><kwd>моча</kwd><kwd>дети</kwd><kwd>дисплазия соединительной ткани</kwd><kwd>оксипролин</kwd></kwd-group><kwd-group xml:lang="en"><kwd>connective tissue</kwd><kwd>amino acid profile</kwd><kwd>urine</kwd><kwd>children</kwd><kwd>connective tissue dysplasia</kwd><kwd>hydroxyproline</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">Antunes M.C., Scirè A., Talarico R., Alexander T., Avcin T., Belocchi C., Doria A., Franceschini F., Galetti I., Govoni M., Hachulla E., Launay D., Lepri G., Macieira C., Matucci-Cerinic M., Montecucco C. M., Moraes-Fontes M. 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