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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">10327</article-id><article-id pub-id-type="doi">10.32607/20758251-2018-10-4-115-120</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Forum</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Форум</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">Tag7-Mts1 Complex Induces Lymphocytes Migration via CCR5 and CXCR3 Receptors</article-title><trans-title-group xml:lang="ru"><trans-title>Комплекс Tag7-Mts1 вызывает миграцию лимфоцитов, взаимодействуя с рецепторами CCR5 и CXCR3</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sharapova</surname><given-names>T. N.</given-names></name><name xml:lang="ru"><surname>Шарапова</surname><given-names>T. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>yashin_co@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Romanova</surname><given-names>E. A.</given-names></name><name xml:lang="ru"><surname>Романова</surname><given-names>E. A.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>yashin_co@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Sashchenko</surname><given-names>L. P.</given-names></name><name xml:lang="ru"><surname>Сащенко</surname><given-names>Л. П.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>yashin_co@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Yashin</surname><given-names>D. V.</given-names></name><name xml:lang="ru"><surname>Яшин</surname><given-names>Д. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><email>yashin_co@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Gene Biology of the Russian Academy of Sciences</institution></aff><aff><institution xml:lang="ru">Институт биологии гена РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2018-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2018</year></pub-date><volume>10</volume><issue>4</issue><issue-title xml:lang="en">VOL 10, NO4 (2018)</issue-title><issue-title xml:lang="ru">ТОМ 10, №4 (2018)</issue-title><fpage>115</fpage><lpage>120</lpage><history><date date-type="received" iso-8601-date="2020-01-17"><day>17</day><month>01</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2018, Sharapova T.N., Romanova E.A., Sashchenko L.P., Yashin D.V.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2018, Шарапова T.Н., Романова E.A., Сащенко Л.П., Яшин Д.В.</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="en">Sharapova T.N., Romanova E.A., Sashchenko L.P., Yashin D.V.</copyright-holder><copyright-holder xml:lang="ru">Шарапова T.Н., Романова E.A., Сащенко Л.П., Яшин Д.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/10327">https://actanaturae.ru/2075-8251/article/view/10327</self-uri><abstract xml:lang="en"><p>The discovery of new chemokines that induce the migration of lymphocytes to the infection site is important for the targeted search for therapeutic agents in immunotherapy. We recently showed that Tag7 (PGLYRP1), an innate immunity protein, forms a stable complex with the Ca2+ -binding protein Mts1 (S100A4), which is able to induce lymphocyte movement, although the individual Tag7 and Mts1 do not have this activity. The purpose of this study is to identify receptors that induce the migration of lymphocytes along the concentration gradient of the Tag7-Mts1 complex, and the components of this complex capable of interacting with these receptors. The study investigated the migration of human PBMC under the action of the Tag7-Mts1complex. PBMC of healthy donors were isolated using a standard Ficoll-Hypaque gradient centrifugation procedure. It has been established that the movement of PBMC along the concentration gradient of the Tag7-Mts1 complex is induced by the classical chemotactic receptors CCR5 and CXCR3. It has been shown that only Mts1 is able to bind to the extracellular domain of CCR5, however, this binding is not enough to induce cell movement. A comparative analysis of the primary and 3D structures of the three proteins revealed the homology of the amino acid sequence fragments of the Tag7-Mts1 protein complex with different sites of the CCR5 receptor ligand - MIP1α protein. In conclusion, it should be noted that the Tag7-Mts1 complex can be considered as a new ligand of the classical chemotactic receptors CCR5 and CXCR3.</p></abstract><trans-abstract xml:lang="ru"><p>Обнаружение новых хемокинов, индуцирующих миграцию лимфоцитов к очагу поражения, важно для направленного поиска средств для иммунотерапии. Недавно мы показали, что белок Tag7 (PGLYRP1) системы врожденного иммунитета образует с Са2+-связывающим белком Mts1 (S100A4) стабильный комплекс, способный индуцировать движение лимфоцитов, хотя каждый из этих белков, взятый по отдельности, такой активностью не обладает. Цель настоящего исследования состояла в выявлении рецепторов, индуцирующих миграцию лимфоцитов по градиенту концентрации комплекса Tag7-Mts1, и компонентов этого комплекса, способных взаимодействовать с этими рецепторами. В работе изучена миграция PBMC человека под действием комплекса Tag7-Mts1. Мононуклеарные клетки периферической крови здоровых доноров выделяли с помощью стандартной процедуры центрифугирования в градиенте Ficoll-Hypaque. Установлено, что движение мононуклеарных клеток периферической крови по градиенту концентрации комплекса Tag7-Mts1 индуцируется классическими хемотаксическими рецепторами CCR5 и CXCR3. Показано, что только Mts1 способен связываться с внеклеточным доменом CCR5, однако этого связывания недостаточно для индукции движения клеток. Сравнительный анализ первичной и пространственной структур трех белков выявил гомологию фрагментов аминокислотных последовательностей белков комплекса Tag7-Mts1 с различными участками лиганда CCR5-рецептора - белка MIP1α. Следует отметить, что комплекс Tag7-Mts1 можно рассматривать как новый лиганд классических хемотаксических рецепторов CCR5 и CXCR3.</p></trans-abstract><kwd-group xml:lang="en"><kwd>Chemotaxis</kwd><kwd>chemokine</kwd><kwd>chemoreceptor</kwd><kwd>Tag7-Mts1 complex</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>комплекс Tag7–Mts1</kwd><kwd>хемотаксис</kwd><kwd>хемокин</kwd><kwd>хеморецептор</kwd></kwd-group><funding-group><funding-statement xml:lang="en">This work was financially supported by the Russian Science Foundation, grant No. 15-14-00031-P.</funding-statement><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке гранта РНФ № 15-14-00031-П.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>[1] Bryant V.L., Slade C.A. // Immunol. 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