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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="brief-report" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Terapevticheskii arkhiv</journal-id><journal-title-group><journal-title xml:lang="en">Terapevticheskii arkhiv</journal-title><trans-title-group xml:lang="ru"><trans-title>Терапевтический архив</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0040-3660</issn><issn publication-format="electronic">2309-5342</issn><publisher><publisher-name xml:lang="en">LLC Obyedinennaya Redaktsiya</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">32105</article-id><article-id pub-id-type="doi">10.17116/terarkh2016881282-87</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Editorial article</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Передовая статья</subject></subj-group><subj-group subj-group-type="article-type"><subject>Short Communication</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Oligosecretory monoclonal gammopathy with renal involvement</article-title><trans-title-group xml:lang="ru"><trans-title>Олигосекреторная моноклональная гаммапатия с поражением почек</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kozlovskaya</surname><given-names>L V</given-names></name><name xml:lang="ru"><surname>Козловская</surname><given-names>Л В</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Rameev</surname><given-names>V V</given-names></name><name xml:lang="ru"><surname>Рамеев</surname><given-names>В В</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Androsova</surname><given-names>T V</given-names></name><name xml:lang="ru"><surname>Андросова</surname><given-names>Т В</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kogarko</surname><given-names>I N</given-names></name><name xml:lang="ru"><surname>Когарко</surname><given-names>И Н</given-names></name></name-alternatives><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kogarko</surname><given-names>B S</given-names></name><name xml:lang="ru"><surname>Когарко</surname><given-names>Б С</given-names></name></name-alternatives><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Mrykhin</surname><given-names>N N</given-names></name><name xml:lang="ru"><surname>Мрыхин</surname><given-names>Н Н</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Rekhtina</surname><given-names>I G</given-names></name><name xml:lang="ru"><surname>Рехтина</surname><given-names>И Г</given-names></name></name-alternatives><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en"></institution></aff><aff><institution xml:lang="ru">Первый Московский государственный медицинский университет им. И.М. Сеченова Минздрава России</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en"></institution></aff><aff><institution xml:lang="ru">Институт химической физики им. Н.Н. Семенова РАН</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en"></institution></aff><aff><institution xml:lang="ru">Гематологический научный центр Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2016-12-15" publication-format="electronic"><day>15</day><month>12</month><year>2016</year></pub-date><volume>88</volume><issue>12</issue><issue-title xml:lang="en">VOL 88, NO12 (2016)</issue-title><issue-title xml:lang="ru">ТОМ 88, №12 (2016)</issue-title><fpage>82</fpage><lpage>87</lpage><history><date date-type="received" iso-8601-date="2020-04-10"><day>10</day><month>04</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2016, Consilium Medicum</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2016, ООО "Консилиум Медикум"</copyright-statement><copyright-year>2016</copyright-year><copyright-holder xml:lang="en">Consilium Medicum</copyright-holder><copyright-holder xml:lang="ru">ООО "Консилиум Медикум"</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-nc-sa/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://ter-arkhiv.ru/0040-3660/article/view/32105">https://ter-arkhiv.ru/0040-3660/article/view/32105</self-uri><abstract xml:lang="en"><p>The article deals with the so-called monoclonal gammopathy of undetermined significance (MGUS), which is being actively explored in the world and has been recently investigated in Russia. It indicates the principles of identifying the phenotypes of MGUS and criteria for assessing the risk of its progression to cancer. There is an update on the possible involvement of monoclonal proteins in the pathogenesis of certain non-neoplastic kidney diseases, renal injuries in particular. The paper gives their classification and enumerates differential diagnostic techniques, including the Freelite method, a highly sensitive one to determine free light chains (FLC), prognostic criteria, and approaches to treating each separate form in relation to the phenotype of a monoclonal protein. The authors present their own data on detection rates for MGUS at a multidisciplinary hospital and a clinical case of MGUS-associated membranoproliferative glomerulonephritis, by justifying a treatment regimen containing bortezomib (velcade).</p></abstract><trans-abstract xml:lang="ru"><p>Аннотация Статья посвящена активно изучаемой в мире и последние годы в России так называемой моноклональной гаммапатии неопределенного значения (MGUS). Указаны принципы выделения фенотипов MGUS, критерии оценки риска ее прогрессирования в злокачественную опухоль. Представлены современные данные о возможности участия моноклональных белков в патогенезе некоторых заболеваний неопухолевой природы, в частности поражений почек. Дана их классификация, перечислены методы дифференциальной диагностики, в том числе высокочувствительный метод определения свободных легких цепей (FLC) — Freelite, критерии прогноза, подходы к лечению каждой отдельной формы в зависимости от фенотипа моноклонального белка. Приведены собственные данные о частоте выявления MGUS в многопрофильном стационаре и клиническое наблюдение мембранопролиферативного гломерулонефрита, ассоциированного с MGUS, с обоснованием схемы терапии, содержащей бортезомиб (вилкейд).</p></trans-abstract><kwd-group xml:lang="en"><kwd>oligosecretory monoclonal gammopathy</kwd><kwd>monoclonal gammopathy of undetermined significance</kwd><kwd>Freelite method</kwd><kwd>membranoproliferative glomerulonephritis</kwd><kwd>free light chains (FLC)</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>олигосекреторная моноклональная гаммапатия</kwd><kwd>моноклональная гаммапатия неопределенного значения</kwd><kwd>метод Freelite</kwd><kwd>мембранопролиферативный гломерулонефрит</kwd><kwd>свободные легкие цепи</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Kyle R, Rajkumar S Monoclonal gammopathy of undetermined significance and smouldering multiple myeloma: emphasis on risk factors for progression. 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