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<article article-type="research-article" dtd-version="1.3" 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" xml:lang="ru"><front><journal-meta><journal-id journal-id-type="publisher-id">docru</journal-id><journal-title-group><journal-title xml:lang="ru">Доктор.Ру</journal-title><trans-title-group xml:lang="en"><trans-title>Title</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1727-2378</issn><issn pub-type="epub">2713-2994</issn><publisher><publisher-name>ООО "ГК "РУСМЕДИКАЛ"</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.31550/1727-2378-2022-21-6-63-66</article-id><article-id custom-type="elpub" pub-id-type="custom">docru-53</article-id><article-categories><subj-group subj-group-type="heading"><subject>Research Article</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="ru"><subject>ТЕРАПИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>INTERNAL MEDICINE</subject></subj-group></article-categories><title-group><article-title>Селективный дефицит иммуноглобулина А в отдаленном периоде после терапии ритуксимабом</article-title><trans-title-group xml:lang="en"><trans-title>Selective Immunoglobulin A Deficiency that Developed in the Long-Term Period after Rituximab Therapy</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Москалец</surname><given-names>О. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Moskalets</surname><given-names>O. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Москалец Оксана Владимировна - к. м. н., ведущий научный сотрудник научно-исследовательской лаборатории</p><p>115054, г. Москва, ул. Щепкина, д. 61/2</p></bio><bio xml:lang="en"><p>61/2 Schepkina Str., Moscow 115054</p></bio><email xlink:type="simple">6816000@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ГБУЗ МО «Московский областной научно-исследовательский клинический институт имени М.Ф. Владимирского»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Moscow Regional Research Clinical Institute named after M.F. Vladimirskiy</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>14</day><month>02</month><year>2025</year></pub-date><volume>21</volume><issue>6</issue><issue-title>ТЕРАПИЯ</issue-title><fpage>63</fpage><lpage>66</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Москалец О.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Москалец О.В.</copyright-holder><copyright-holder xml:lang="en">Moskalets O.V.</copyright-holder><license xml:lang="ru" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>Данная работа распространяется под лицензией Creative Commons Attribution 4.0.</license-p></license><license xml:lang="en" license-type="creative-commons-attribution" xlink:href="https://creativecommons.org/licenses/by/4.0/" xlink:type="simple"><license-p>This work is licensed under a Creative Commons Attribution 4.0 License.</license-p></license></permissions><self-uri xlink:href="https://docru.elpub.ru/jour/article/view/53">https://docru.elpub.ru/jour/article/view/53</self-uri><abstract><p>Цель статьи: продемонстрировать возможность развития отсроченной гипоиммуноглобулинемии после курса иммуносупрессивной терапии.Основные положения. Представлено клиническое наблюдение, когда у пациентки с болезнью Шёгрена и MALT-лимфомой, получавшей в течение нескольких лет ритуксимаб, постепенно сформировался селективный дефицит иммуноглобулина A. Это сопровождалось сущест венным увеличением частоты эпизодов затяжных острых респираторных инфекций. Механизмы формирования стойкого вторичного дефицита антител после иммуносупрессивной терапии до сих пор не изучены и, по-видимому, гетерогенны. Необходимо проводить дифференциальный диагноз с первичными иммунодефицитами.Заключение. Данное клиническое наблюдение подтверждает, что, выбирая ритуксимаб или другие антиВ-клеточные препараты в качест ве средств базисной терапии, нужно помнить о возможном развитии гипоиммуноглобулинемии как в процессе лечения, так и в отдаленном периоде. Перед началом лечения ритуксимабом следует обязательно определять исходные уровни сывороточных иммуноглобулинов для оценки риска инфекционных осложнений и выявления первичных иммунодефицитов и проводить их мониторинг даже после отмены препарата, особенно при развитии инфекционной патологии.</p></abstract><trans-abstract xml:lang="en"><p>Objective of the Paper: To demonstrate the possibility of developing late-onset hypoimmunoglobulinemia after a course of immunosuppressive therapy.Key points. A clinical observation is presented when a selective immunoglobulin A deficiency gradually developed in a patient with Sjögren's disease and MALT-lymphoma, who received rituximab for several years. It was associated with increased frequency of acute respiratory infections. The molecular mechanisms of secondary antibody deficiencies followed by immunisupressive therapy are virtually unknown and are likely to be heterogenous. It is necessary to carry out a differential diagnosis with primary immunodeficiencies.Conclusion. This clinical observation confirms that when choosing rituximab or other anti-B-cell drugs as basic therapy, one should be aware of the possible development of hypoimmunoglobulinemia both during treatment and in the long-term period. Before starting treatment with rituximab, one must determine the initial levels of serum immunoglobulins to assess the risk of infectious complications and identify primary immunodeficiencies and monitor them even after discontinuation of the drug, particularly in patients with infections.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>ритуксимаб</kwd><kwd>дефицит антител</kwd><kwd>иммуноглобулин А</kwd><kwd>синдром Шёгрена</kwd><kwd>лимфома</kwd></kwd-group><kwd-group xml:lang="en"><kwd>rituximab</kwd><kwd>antibody deficiency</kwd><kwd>immunoglobulin A</kwd><kwd>Sjogren’s syndrome</kwd><kwd>lymphoma</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Насонов Е.Л., Лила А.М. Применение ритуксимаба и других анти-В-клеточных препаратов при иммуновоспалительных ревматических заболеваниях. 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