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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">Russian Journal of Allergy</journal-id><journal-title-group><journal-title xml:lang="en">Russian Journal of Allergy</journal-title><trans-title-group xml:lang="ru"><trans-title>Российский Аллергологический Журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1810-8830</issn><issn publication-format="electronic">2686-682X</issn><publisher><publisher-name xml:lang="en">Publishing House ABV Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">1372</article-id><article-id pub-id-type="doi">10.36691/RJA1372</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Reviews</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Научные обзоры</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">Modern view on LRBA deficiency</article-title><trans-title-group xml:lang="ru"><trans-title>Дефицит LRBA: современное представление</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1508-0640</contrib-id><name-alternatives><name xml:lang="en"><surname>Latysheva</surname><given-names>Tatyana V.</given-names></name><name xml:lang="ru"><surname>Латышева</surname><given-names>Татьяна Васильевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>head of the Immunopathology and Intensive Care Department, NRC Institute of Immunology FMBA of Russia, MD, PhD, professor</p></bio><bio xml:lang="ru"><p>зав. отделением иммунопатологии и интенсивной терапии, ФГБУ «ГНЦ Институт иммунологии» ФМБА России, доктор медицинских наук, профессор</p></bio><email>tv.latysheva@nrcii.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1606-205X</contrib-id><name-alternatives><name xml:lang="en"><surname>Latysheva</surname><given-names>Elena A.</given-names></name><name xml:lang="ru"><surname>Латышева</surname><given-names>Елена Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>chief researcher of the Immunopathology and Intensive Care Department, NRC Institute of Immunology FMBA of Russia, MD, PhD</p></bio><bio xml:lang="ru"><p>старший научный сотрудник отделения иммунопатологии, ФГБУ «ГНЦ Институт иммунологии» ФМБА России, доктор медицинских наук</p></bio><email>ea.latysheva@nrcii.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2587-7928</contrib-id><name-alternatives><name xml:lang="en"><surname>Setdikova</surname><given-names>Nailya Kh.</given-names></name><name xml:lang="ru"><surname>Сетдикова</surname><given-names>Наиля Харисовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>senior researcher of the Immunopathology and Intensive Care Department, NRC Institute of Immunology FMBA of Russia, MD, PhD</p></bio><bio xml:lang="ru"><p>ведущий научный сотрудник отделения иммунопатологии, ФГБУ «ГНЦ Институт иммунологии» ФМБА России, доктор медицинских наук</p></bio><email>nh.setdikova@nrcii.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0283-5637</contrib-id><name-alternatives><name xml:lang="en"><surname>Esaulova</surname><given-names>Daria R.</given-names></name><name xml:lang="ru"><surname>Есаулова</surname><given-names>Дарья Ростиславовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>medical resident of the Immunopathology and Intensive Care Department, NRC Institute of Immunology FMBA of Russia</p></bio><bio xml:lang="ru"><p>ординатор отделения иммунопатологии, ФГБУ «ГНЦ Институт иммунологии» ФМБА России</p></bio><email>esaulova.d.r@gmail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">NRCI Institute of Immunology FMBA of Russia</institution></aff><aff><institution xml:lang="ru">ГНЦ Институт иммунологии ФМБА России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2020-10-29" publication-format="electronic"><day>29</day><month>10</month><year>2020</year></pub-date><volume>17</volume><issue>3</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>50</fpage><lpage>56</lpage><history><date date-type="received" iso-8601-date="2020-07-14"><day>14</day><month>07</month><year>2020</year></date><date date-type="accepted" iso-8601-date="2020-07-24"><day>24</day><month>07</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2020, Pharmarus Print Media</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2020, Фармарус Принт Медиа</copyright-statement><copyright-year>2020</copyright-year><copyright-holder xml:lang="en">Pharmarus Print Media</copyright-holder><copyright-holder xml:lang="ru">Фармарус Принт Медиа</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2022-10-29"/></permissions><self-uri xlink:href="https://rusalljournal.ru/raj/article/view/1372">https://rusalljournal.ru/raj/article/view/1372</self-uri><abstract xml:lang="en"><p>Facilities of molecular genetic methods allow to distinguish several monogenic deficiencies in the general group of primary immunodeficiencies, including common variable immune deficiency (CVID), which have peculiarities of the natural course, therapy, and prognosis. One of these nosologies is LRBA deficiency. In this article a number of foreign sources were reviewed, systematized and classified to define a comprehensive understanding of the LRBA deficiency phenomenon . The most relevant scientific studies of North America and Europe and publications from various ranking medical journals were analyzed.</p> <p>LRBA deficiency is a PID caused by mutations in LRBA gene that disrupt the immune system regulation. It is characterized by lymphoproliferation, autoaggression, hypogammaglobulinemia and recurrent infections. Sometimes LRBA deficiency is called LATAIE disease (LRBA deficiency with autoantibodies, regulatory T-cell defects, autoimmune infiltration, and enteropathy).</p> <p>Special attention was given to the mutation of LRBA gene and the connection to the defects caused in T-­ and B­-lymphocytes, the clinical picture and diagnostics. It was suggested that LRBA protein reduces the level of autophagy, leading to increased apoptosis, impared T-­ and B-­cell immune response, lymphoproliferation and autoimmune disorders. LRBA protein is especially expressed in the immune cells, its deficiency leads to defects of B-­cells differentiation. However, LRBA deficiency does not affect T-regulatory cells differentiation. Main approaches to the treatment of patients with LRBA deficiency are presented in the article.</p> <p>Methods of systemic and content analysis of Russian and foreign sources were used when writing the article.</p></abstract><trans-abstract xml:lang="ru"><p>С развитием молекулярно-генетического обследования группа первичных иммунодефицитов, в том числе общей вариабельной иммунной недостаточности (ОВИН), распалась на несколько моногенных дефектов, которые имеют свои особенности течения, терапии, прогноза. Одна из таких нозологий – это дефицит LRBA (lipopolysaccharide-responsive and beige-like anchor protein).</p> <p>В статье представлен обзор, систематизация и классификация информации из иностранных источников для комплексного понимания феномена дефицита LRBA. Среди источников статьи – наиболее актуальные исследования ученых стран Северной Америки и Европы, публикации в различных значимых медицинских журналах на иностранных языках.</p> <p>Дефицит LRBA – это ПИД, вызванный мутациями в гене LRBA, приводящими к нарушению нормальной регуляции иммунной системы, и характеризующийся лимфопролиферацией, аутоагрессией, гипогаммаглобулинемией и рецидивирующими инфекциями. Дефицит LRBA иногда называют болезнью LATAIE (дефицит LRBA с аутоантителами, с дефектами Т-регуляторных клеток, аутоиммунной инфильтрацией и энтеропатией).</p> <p>Особое внимание уделено вопросам мутации гена LRBA и связи с дефектами, вызываемыми в Т- и В-лимфоцитах, описана клиническая картина и принципы диагностики. В статье определено, что белок LRBA снижает уровень аутофагии, приводя к повышению апоптоза. Это вызывает нарушения в T- и B-клеточном иммунитете, что приводит к лимфопролиферации и аутоиммунным нарушениям. Белок LRBA особенно сильно экспрессируется в клетках иммунной системы, его дефицит приводит к дефектам в дифференцировке B-клеток. В то же время дефицит LRBA не влияет на дифференцировку Т-регуляторных клеток. В статье описаны основные подходы к терапии пациентов с дефицитом LRBA.</p> <p>Для подготовки статьи использован метод системного анализа и контент-анализа российских и иностранных источников.</p></trans-abstract><kwd-group xml:lang="en"><kwd>primary immunodeficiency</kwd><kwd>PID</kwd><kwd>common variable immunodeficiency</kwd><kwd>CVID</kwd><kwd>LRBA deficiency</kwd><kwd>LRBA gene</kwd><kwd>LRBA protein</kwd><kwd>mutation</kwd><kwd>B-cell differentiation defects</kwd><kwd>abatacept</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>первичный иммунодефицит</kwd><kwd>ПИД</kwd><kwd>общая вариабельная иммунная недостаточность</kwd><kwd>ОВИН</kwd><kwd>дефицит LRBA</kwd><kwd>ген LRBA</kwd><kwd>белок LRBA</kwd><kwd>мутация</kwd><kwd>дефекты дифференцировки В-клеток</kwd><kwd>абатацепт</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Joyce EY, Jordan S, Yesim YD. 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