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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">therapeutic</journal-id><journal-title-group><journal-title xml:lang="ru">Южно-Российский журнал терапевтической практики</journal-title><trans-title-group xml:lang="en"><trans-title>South Russian Journal of Therapeutic Practice</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2712-8156</issn><publisher><publisher-name>РостГМУ</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21886/2712-8156-2025-6-2-87-92</article-id><article-id custom-type="elpub" pub-id-type="custom">therapeutic-603</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>КЛИНИЧЕСКИЕ СЛУЧАИ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CLINICAL CASES</subject></subj-group></article-categories><title-group><article-title>Редкий случай развития аlekt-2-амилоидоза с поражением почек</article-title><trans-title-group xml:lang="en"><trans-title>A rare case of ALECT-2-amyloidosis with kidney damage</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2733-4524</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Батюшин</surname><given-names>М. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Batyushin</surname><given-names>M. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Батюшин Михаил Михайлович, проф., д.м.н., профессор кафедры внутренних болезней №2</p><p>Ростов-на-Дону</p></bio><bio xml:lang="en"><p>Mikhail M. Batiushin, Professor, Dr. Sci. (Med.), Professor of the Department of Internal Diseases No. 2</p><p>Rostov-on-Don</p></bio><email xlink:type="simple">batjushin-m@rambler.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Аблякимова</surname><given-names>Л. Р.</given-names></name><name name-style="western" xml:lang="en"><surname>Ablyakimova</surname><given-names>L. R.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Аблякимова Лера Рустемовна, врач-нефролог</p><p>Батайск</p></bio><bio xml:lang="en"><p>Lera R. Ablyakimova, nephrologist</p><p>Bataysk</p></bio><email xlink:type="simple">l.ablyalimova00@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0412-1726</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гурцкой</surname><given-names>Р. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Gurtskoy</surname><given-names>R. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гурцкой Роман Александрович, проф., д.м.н., руководитель Дорожного центра урологии, нефрологии и андрологии</p><p>Батайск</p></bio><bio xml:lang="en"><p>Roman A. Gurtskoy, Professor, Dr. Sci. (Med.), Head of the Road Center of Urology, Nephrology and Andrology</p><p>Bataysk</p></bio><email xlink:type="simple">roin.70@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Семененко</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Semenenko</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Семененко Екатерина Владимировна, врач-терапевт-пульмонолог высшй категории, заведующая терапевтическим отделением</p><p>Батайск</p></bio><bio xml:lang="en"><p>Ekaterina V. Semenenko, pulmonologist of the highest category, head of the therapeutic department</p><p>Bataysk</p></bio><email xlink:type="simple">Katerinas_1304@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Повилайтите</surname><given-names>П. Э.</given-names></name><name name-style="western" xml:lang="en"><surname>Povilaityte</surname><given-names>P. E.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Повилайтите Патриция Эдмундовна, к.б.н., заведующая лабораторией</p><p>Ростов-на-Дону</p></bio><bio xml:lang="en"><p>Patricia E. Povilaite, Cand. Sci. (Bio.), Head of the Laboratory</p><p>Rostov-on-Don</p></bio><email xlink:type="simple">povpe@yandex.ru</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5933-5732</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сарвилина</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sarvilina</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сарвилина Ирина Владиславовна, проф., д.м.н., директор</p><p>Ростов-на-Дону</p></bio><bio xml:lang="en"><p>Irina V. Sarvilina, Professor, Dr. Sci. (Med.), Director</p><p>Rostov-on-Don</p></bio><email xlink:type="simple">isarvilina@mail.ru</email><xref ref-type="aff" rid="aff-4"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru">ФГБОУ ВО «Ростовский государственный медицинский университет» Минздрава России<country>Россия</country></aff><aff xml:lang="en">Rostov State Medical University<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru">«Клиническая больница “РЖД-Медицина”» г. Ростова-на-Дону<country>Россия</country></aff><aff xml:lang="en">“RZhD-Medicine” Clinical Hospital of Rostov-on-Don<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru">ГБУ Ростовской области «Патологоанатомическое бюро», лаборатория электронной микроскопии<country>Россия</country></aff><aff xml:lang="en">Pathological Anatomy Bureau, Electron Microscopy Laboratory<country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru">Медицинский центр «Новомедицина»<country>Россия</country></aff><aff xml:lang="en">Medical Center “Novomeditsina”<country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>12</day><month>07</month><year>2025</year></pub-date><volume>6</volume><issue>2</issue><fpage>87</fpage><lpage>92</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Батюшин М.М., Аблякимова Л.Р., Гурцкой Р.А., Семененко Е.В., Повилайтите П.Э., Сарвилина И.В., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Батюшин М.М., Аблякимова Л.Р., Гурцкой Р.А., Семененко Е.В., Повилайтите П.Э., Сарвилина И.В.</copyright-holder><copyright-holder xml:lang="en">Batyushin M.M., Ablyakimova L.R., Gurtskoy R.A., Semenenko E.V., Povilaityte P.E., Sarvilina I.V.</copyright-holder><license 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://www.therapeutic-j.ru/jour/article/view/603">https://www.therapeutic-j.ru/jour/article/view/603</self-uri><abstract><p>Представлен клинический случай редкого заболевания АLECT-2-амилоидоза почек, являющийся первым описанием данной патологии в РФ. Представлены данные пациентки Д., 72 года, обратилась за медицинской помощью в декабре 2024 г. с жалобами на выраженную общую слабость, одышку, отсутствие аппетита, распространённые отёки. Отмечались признаки нефротического синдрома. В ходе морфологического исследования биоптата почки была выявлена картина амилоидоза с преимущественным поражением стенок артерий, артериол, а также клубочков. При этом отложения идентифицировались как не принадлежащие к АА-типу и AL-типу с помощью иммунофлюоресцентного анализа с применением соответствующих антител. Протеомный анализ мочи выявил повышение уровня лейкоцитарного хематоксического фактора 2 (LECT2), что свидетельствует о его отношении к амилоидогенезу. При этом в описанных в литературе случаях, как правило, не наблюдалось повышения его уровня в плазме крови, чего также не было зарегистрировано в ходе протеомного анализа крови у нашей пациетки. Таким образом, амилоидоз с поражением почек обусловлен у пациентки LECT2 и идентифицирован как АLECT2-амилоидоз.</p></abstract><trans-abstract xml:lang="en"><p>A clinical case of the rare kidney disease ALECT-2-amyloidosis, which is the first description of this pathology in the Russian Federation, is presented. The data of patient D., 72 years old, who sought medical help in December 2024 with complaints of severe general weakness, shortness of breath, lack of appetite, and widespread edema are presented. There were signs of nephrotic syndrome. A morphological examination of the kidney biopsy revealed a pattern of amyloidosis with a predominant lesion of the arterial walls, arterioles, and glomeruli. At the same time, the deposits were identified as not belonging to the AA-type and AL-type using immunofluorescence analysis using appropriate antibodies. Proteomic analysis of urine revealed an increase in the level of leukocyte chemotoxic factor 2 (LECT2), which indicates its relation to amyloidogenesis. At the same time, in the cases described in the literature, as a rule, there was no increase in its plasma level, which was also not recorded during a proteomic blood test in our patient. Thus, amyloidosis with kidney damage was caused in the patient by LECT2 and was identified as LECT2-amyloidosis.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>АLECT2-амилоидоз</kwd><kwd>лейкоцитарный хемотаксический фактор 2</kwd></kwd-group><kwd-group xml:lang="en"><kwd>ALECT2-amyloidosis</kwd><kwd>leukocyte chemotactic factor 2</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">Benson MD, James S, Scott K, Liepnieks JJ, Kluve-Beckerman B. Leukocyte chemotactic factor 2: A novel renal amyloid protein. 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