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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Russian Journal of Genetics</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Genetics</journal-title><trans-title-group xml:lang="ru"><trans-title>Генетика</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0016-6758</issn><issn publication-format="electronic">3034-5103</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">667069</article-id><article-id pub-id-type="doi">10.31857/S0016675823100065</article-id><article-id pub-id-type="edn">UCMSOE</article-id><article-categories><subj-group subj-group-type="toc-heading"><subject>ГЕНЕТИКА ЧЕЛОВЕКА</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Polymorphism of the <italic>MAOA</italic> Gene (rs1137070) and Internet Addiction in Adolescents</article-title><trans-title-group xml:lang="ru"><trans-title>Полиморфные варианты гена <italic>MAOA</italic> (rs1137070) и интернет-зависимость у подростков</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kopylova</surname><given-names>K. V.</given-names></name><name xml:lang="ru"><surname>Копылова</surname><given-names>К. В.</given-names></name></name-alternatives><email>smarinv@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Marchenko</surname><given-names>I. V.</given-names></name><name xml:lang="ru"><surname>Марченко</surname><given-names>И. В.</given-names></name></name-alternatives><email>smarinv@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Shubina</surname><given-names>M. V.</given-names></name><name xml:lang="ru"><surname>Шубина</surname><given-names>М. В.</given-names></name></name-alternatives><email>smarinv@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Gorbacheva</surname><given-names>N. N.</given-names></name><name xml:lang="ru"><surname>Горбачева</surname><given-names>Н. Н.</given-names></name></name-alternatives><email>smarinv@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Novitckii</surname><given-names>I. A.</given-names></name><name xml:lang="ru"><surname>Новицкий</surname><given-names>И. А.</given-names></name></name-alternatives><email>smarinv@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Smolnikova</surname><given-names>M. V.</given-names></name><name xml:lang="ru"><surname>Смольникова</surname><given-names>М. В.</given-names></name></name-alternatives><email>smarinv@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Scientific Research Institute of Medical Problems of the North, Federal Research Center “Krasnoyarski Scientific 
Center Siberian Branch of the Russian Academy of Scienses”</institution></aff><aff><institution xml:lang="ru">Научно-исследовательский институт медицинских проблем Севера, Федеральный исследовательский центр “Красноярский научный центр Сибирского отделения Российской академии наук”</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2023-10-01" publication-format="electronic"><day>01</day><month>10</month><year>2023</year></pub-date><volume>59</volume><issue>10</issue><fpage>1191</fpage><lpage>1198</lpage><history><date date-type="received" iso-8601-date="2025-02-26"><day>26</day><month>02</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, К.В. Копылова, И.В. Марченко, М.В. Шубина, Н.Н. Горбачева, И.А. Новицкий, М.В. Смольникова</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, К.В. Копылова, И.В. Марченко, М.В. Шубина, Н.Н. Горбачева, И.А. Новицкий, М.В. Смольникова</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">К.В. Копылова, И.В. Марченко, М.В. Шубина, Н.Н. Горбачева, И.А. Новицкий, М.В. Смольникова</copyright-holder><copyright-holder xml:lang="ru">К.В. Копылова, И.В. Марченко, М.В. Шубина, Н.Н. Горбачева, И.А. Новицкий, М.В. Смольникова</copyright-holder></permissions><self-uri xlink:href="https://transsyst.ru/0016-6758/article/view/667069">https://transsyst.ru/0016-6758/article/view/667069</self-uri><abstract xml:lang="en"><p id="idm45181324597344">Monoamine oxidase A (MAOA) catalyzes the degradation of norepinephrine, dopamine, and serotonin, i.e. neurotransmitters involved in the pathogenesis of pathological addictions, including internet addiction (IA). Gene <italic>MAOA</italic> has been actively studied in terms of genetic predisposition to the development of aggressive behavior potentially involved in the formation of IA. The study included 602 adolescents (9–18 years old, mean age = 14.6, SD 1.7) from the Angara-Yenisei macroregion (Russians <italic>n</italic> = 329, Tuvans <italic>n</italic> = 158, Khakasses <italic>n</italic> = 158). The type of IA was assessed according to the Chen scale (Chen Internet Addiction Scale, CIAS), gene polymorphism was detected using real-time PCR. The distribution of the <italic>TT</italic> genotype of <italic>MAOA</italic> rs1137070 polymorphism associated with low activity of the monoamine oxidase A enzyme and aggressive behavior affected by IA, was found to be significantly higher in Tuvan adolescents compared with Russians (31.1/21.2% <italic>p</italic> = = 0.02). Pathological internet addiction (more than 65 points by Chen scale) often observed among Khakass adolescents compared to Russian (26.4/15.5%, <italic>p</italic> = 0.03). Thus, the allelic variant <italic>T</italic> of <italic>MAOA</italic> rs1137070 polymorphism appears to be potential marker for dependent and aggressive behavior to form, Asian representatives being more susceptible to the development of pathological addictions than Caucasian populations.</p></abstract><trans-abstract xml:lang="ru"><p id="idm45181324594720">Моноаминоксидаза А (MAOA) катализирует распад норадреналина, дофамина и серотонина – нейромедиаторов, участвующих в патогенезе ряда патологических зависимостей, к которым относят и интернет-зависимость (ИЗ). Ген <italic>МАОА</italic> активно исследуется в аспекте генетической предрасположенности в развитии агрессивного поведения, участвующего в формировании зависимости от интернета. В исследование были включены 602 подростка Ангаро-Енисейского макрорегиона (русские <italic>n</italic> = 329, тувинцы <italic>n</italic> = 158, хакасы <italic>n</italic> = 158) в возрастном диапазоне от 9 до 18 лет (средний возраст 14.6 лет, SD 1.7). Тип ИЗ оценивали по шкале Чена (Chen Internet Addiction Scale, CIAS), полиморфизм детектировали с помощью ПЦР-РВ. Выявлено, что частота генотипа <italic>TT</italic> полиморфного варианта rs1137070 гена <italic>MAOA</italic>, ассоциированного с низкой активностью фермента MAOA и агрессивным поведением на фоне интернет-зависимости, значимо выше у тувинских подростков по сравнению с русскими (31.1 против 21.2%, <italic>p</italic> = 0.020). Патологическая интернет-зависимость (более 65 баллов по шкале Чена) чаще наблюдается среди хакасов по сравнению с русскими подростками (26.4 против 15.5%, <italic>p</italic> = = 0.028). Таким образом, наличие аллельного варианта <italic>T</italic> полиморфного варианта rs1137070 гена <italic>MAOA</italic> является потенциальным маркером склонности к формированию зависимого и агрессивного поведения, а тувинцы и хакасы более подвержены к развитию патологических зависимостей, чем русские подростки.</p></trans-abstract><kwd-group xml:lang="en"><kwd>monoamine oxidase</kwd><kwd><italic>MAOA</italic></kwd><kwd>polymorphism</kwd><kwd>Internet addiction</kwd><kwd>adolescents</kwd><kwd>populations.</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>моноаминооксидаза</kwd><kwd><italic>МАОА</italic></kwd><kwd>полиморфизм</kwd><kwd>интернет-зависимость</kwd><kwd>подростки</kwd><kwd>популяции.</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Mboya I.B., Leyaro B.J., Kongo A. et al. 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