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<article 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" xmlns:ali="http://www.niso.org/schemas/ali/1.0/" article-type="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Acta Naturae</journal-id><journal-title-group><journal-title xml:lang="en">Acta Naturae</journal-title><trans-title-group xml:lang="ru"><trans-title>Acta Naturae</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2075-8251</issn><publisher><publisher-name xml:lang="en">Acta Naturae Ltd</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">10841</article-id><article-id pub-id-type="doi">10.32607/20758251-2019-11-2-42-46</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Research Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Экспериментальные статьи</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Assessment of the Phenylketonuria (PKU)-Associated Mutation p.R155H Biochemical Manifestations by Mass Spectrometry-Based Blood Metabolite Profiling</article-title><trans-title-group xml:lang="ru"><trans-title>Оценка степени проявления фенилкетонурии, обусловленной гомозиготной мутацией p.R155H, при помощи масс спектрометрического анализа метаболитов крови</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Baturina</surname><given-names>O. A.</given-names></name><name xml:lang="ru"><surname>Батурина</surname><given-names>О. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mor@niboch.nsc.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Chernonosov</surname><given-names>A. A.</given-names></name><name xml:lang="ru"><surname>Черноносов</surname><given-names>А. А.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mor@niboch.nsc.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Koval</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Коваль</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mor@niboch.nsc.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Morozov</surname><given-names>I. V.</given-names></name><name xml:lang="ru"><surname>Морозов</surname><given-names>И. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>mor@niboch.nsc.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Joint Center for genomic, proteomic and metabolomics studies, Institute of Chemical Biology and Fundamental Medicine SB RAS</institution></aff><aff><institution xml:lang="ru">Институт химической биологии и фундаментальной медицины СО РАН</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Novosibirsk State University</institution></aff><aff><institution xml:lang="ru">Новосибирский государственный университет</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2019-06-15" publication-format="electronic"><day>15</day><month>06</month><year>2019</year></pub-date><volume>11</volume><issue>2</issue><issue-title xml:lang="en">VOL 11, NO2 (2019)</issue-title><issue-title xml:lang="ru">ТОМ 11, №2 (2019)</issue-title><fpage>42</fpage><lpage>46</lpage><history><date date-type="received" iso-8601-date="2020-01-21"><day>21</day><month>01</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2019, Baturina O.A., Chernonosov A.A., Koval V.V., Morozov I.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2019, Батурина О.А., Черноносов А.А., Коваль В.В., Морозов И.В.</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="en">Baturina O.A., Chernonosov A.A., Koval V.V., Morozov I.V.</copyright-holder><copyright-holder xml:lang="ru">Батурина О.А., Черноносов А.А., Коваль В.В., Морозов И.В.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://actanaturae.ru/2075-8251/article/view/10841">https://actanaturae.ru/2075-8251/article/view/10841</self-uri><abstract xml:lang="en"><p>Homozygous siblings with different treatment histories represent an excellent model to study both the phenotypic manifestation of mutations and the efficacy of therapy. We compared phenylketonuria (PKU) manifestations in two different gender siblings who were homozygous carriers of a rare phenylalanine hydroxylase (PAH) mutation, p.R155H, subjected to different treatments. PKU caused by mild mutations may be easily underdiagnosed if the diagnosis is based solely on the phenylalanine (Phe) blood concentration. One of the described patients is an example of this diagnostic error. For reducing diagnostic errors, we suggest the use of more elaborate methods in screening practice, in particular mass spectrometric analysis of blood metabolites, the efficiency of which is demonstrated in the present study.</p></abstract><trans-abstract xml:lang="ru"><p>Мы сравнили проявления фенилкетонурии (ФКУ) у двух гомозиготных носителей редкой мутации p.R155H - брата и сестры, детей одних и тех же родителей, получавших различное лечение. Такие пациенты представляют собой уникальную модель, позволяющую оценить как степень фенотипического проявления мутации, так и эффективность терапии. ФКУ, обусловленная мутациями с достаточной оста точной активностью фенилаланингидроксилазы, зачастую не выявляется, если диагноз основан исключительно на концентрации фенилаланина в крови. Подобная ошибка была допущена в случае одного из наших пациентов. Для уменьшения вероятности ошибок мы предлагаем использовать для диагностики более точные методы, например, масс-спектрометрический анализ метаболитов крови, эффективность которого показана в данной работе.</p></trans-abstract><kwd-group xml:lang="en"><kwd>phenylketonuria</kwd><kwd>hyperphenylalaninemia</kwd><kwd>p.R155H</kwd><kwd>blood phenylalanine</kwd><kwd>blood carnitine</kwd><kwd>mass spectrometry</kwd><kwd>missense mutation</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>p.R155H</kwd><kwd>гиперфенилаланинемия</kwd><kwd>карнитин в крови</kwd><kwd>масс-спектрометрия</kwd><kwd>мутация</kwd><kwd>фенилаланин в крови</kwd><kwd>фенилкетонурия</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was supported by projects GZ (No. 0309-2019-0020 and 0309-2019-0007).</funding-statement><funding-statement xml:lang="ru">Работа выполнена при поддержке проектов ГЗ (№ 0309-2019-0020 и 0309-2019-0007).</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>[1] Guldberg P., Rey F., Zschocke J., Romano V., Francois B., Michiels L., Ullrich K., Hoffmann G.F., Burgard P., Schmidt H. // Am. 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