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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 Immunology</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Immunology</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский иммунологический журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1028-7221</issn><issn publication-format="electronic">2782-7291</issn><publisher><publisher-name xml:lang="en">Russian Society of Immunology</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">884</article-id><article-id pub-id-type="doi">10.31857/S102872210002400-5</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ORIGINAL ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">The role of human chorionic gonadotropin and its peptide fragments in the regulation of IDO expression by human monocytes</article-title><trans-title-group xml:lang="ru"><trans-title>Роль хорионического гонадотропина и его пептидных фрагментов в регуляции экспрессии IDO моноцитами человека</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Zamorina</surname><given-names>Svetlana</given-names></name><name xml:lang="ru"><surname>Заморина</surname><given-names>Светлана Анатольевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Timganova</surname><given-names>Valeriya</given-names></name><name xml:lang="ru"><surname>Тимганова</surname><given-names>Валерия Павловна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bochkova</surname><given-names>Maria</given-names></name><name xml:lang="ru"><surname>Бочкова</surname><given-names>Мария Станиславовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Khramtsov</surname><given-names>Pavel</given-names></name><name xml:lang="ru"><surname>Храмцов</surname><given-names>Павел Викторович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Raev</surname><given-names>M. .</given-names></name><name xml:lang="ru"><surname>Раев</surname><given-names>М. Б.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Ecology and Genetics of Microorganisms UB RAS</institution></aff><aff><institution xml:lang="ru">Пермский федеральный исследовательский центр УрО РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2018-07-15" publication-format="electronic"><day>15</day><month>07</month><year>2018</year></pub-date><volume>21</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>306</fpage><lpage>310</lpage><history><date date-type="received" iso-8601-date="2020-10-22"><day>22</day><month>10</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2018, Zamorina S., Timganova V., Bochkova M., Khramtsov P., Raev M...</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2018, Заморина С.А., Тимганова В.П., Бочкова М.С., Храмцов П.В., Раев М.Б.</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="en">Zamorina S., Timganova V., Bochkova M., Khramtsov P., Raev M...</copyright-holder><copyright-holder xml:lang="ru">Заморина С.А., Тимганова В.П., Бочкова М.С., Храмцов П.В., Раев М.Б.</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://rusimmun.ru/jour/article/view/884">https://rusimmun.ru/jour/article/view/884</self-uri><abstract xml:lang="en"><p>The role of human chorionic gonadotropin (hCG) and its peptide fragments of β-subunit (LQGV, AQGV, VLPALP) in the regulation of indolеamine-2,3-dioxygenase (IDO) expression in human monocytes was studied in vitro. It is elucidated, that a high concentration of hCG (20 μg/ml) had an independent stimulatory eff ect on the expression of IDO in LPS -, and the IFN-γ – induced monocytes. Peptides AQGVand LQGV (20 μg/ml) also stimulated LPS-induced expression of IDO, but had no eff ect on IFN- γ-induced expression of the enzyme. At the same time, peptide VLPALP (20 μg/ml) provided the stimulatory eff ect only on the IFN-γ-induced expression of IDO. Simultaneously, peptides AQGV and VLPALP increased the production of IL-1β monocytes under LPS-stimulation, while hCG did not exert any independent eff ect. Generally, hCG and oligopeptides of β-hCG subunit enhance the expression of IDO by monocytes, which eventually contributes to peripheral immune tolerance development.</p></abstract><trans-abstract xml:lang="ru"><p>Изучали роль хорионического гонадотропина (ХГ) и пептидных фрагментов его β-субъединицы (LQGV, AQGV, VLPALP) в регуляции экспрессии индоламин-2,3-диоксигеназы (IDO) активированными моноцитами человека в системе in vitro. Установлено, что ХГ (20 мкг/мл) стимулировал экспрессию IDO как в LPS-, так и в IFN-γ- индуцированных моноцитах. В то же время, пептиды AQGV, LQGV (20 мкг/мл) стимулировали только LPS-индуцированную экспрессию IDO, а пептид VLPALP (20 мкг/мл) стимулировал только IFN-γ-индуцированную экспрессию IDO. Одновременно, пептиды (AQGV, VLPALP), повышали продукцию IL-1β моноцитами в условиях LPS-стимуляции, в то время как ХГ не оказывал самостоятельного эффекта. В целом, как ХГ, так и пептидные фрагментов его β-субъединицы, повышали экспрессию IDO моноцитами, что вносит свой вклад в формировании периферической иммунной толерантности</p></trans-abstract><kwd-group xml:lang="ru"><kwd>chorionic gonadotropin</kwd><kwd>regulatory peptides (LQGV</kwd><kwd>AQGV</kwd><kwd>VLPALP)</kwd><kwd>indoleamine-2</kwd><kwd>3- dioxygenase (IDO)</kwd><kwd>immune tolerance</kwd><kwd>monocytes</kwd><kwd>хорионический гонадотропин</kwd><kwd>регуляторные пептиды (LQGV</kwd><kwd>AQGV</kwd><kwd>VLPALP)</kwd><kwd>индоламин-2</kwd><kwd>3-диоксигеназа (IDO)</kwd><kwd>иммунная толерантность</kwd><kwd>моноциты</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Mellor A. L., Munn D. H. Tryptophan catabolism prevents maternal T-cell from activating lethal anti-fetal immune responses // J. Reprod. 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