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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">clinmed</journal-id><journal-title-group><journal-title xml:lang="ru">Клиническая медицина</journal-title><trans-title-group xml:lang="en"><trans-title>Clinical Medicine (Russian Journal)</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">0023-2149</issn><issn pub-type="epub">2412-1339</issn><publisher><publisher-name>ООО «Медицинское информационное агентство»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.30629/0023-2149-2025-103-8-9-647-653</article-id><article-id custom-type="elpub" pub-id-type="custom">clinmed-1267</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>ОРИГИНАЛЬНЫЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL INVESTIGATIONS</subject></subj-group></article-categories><title-group><article-title>Продукция эритропоэтина при анемиях различной этиологии у пожилых</article-title><trans-title-group xml:lang="en"><trans-title>Production of erythropoietin in anemia of various etiology in the elderly</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>Куликов</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Kulikov</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Иван Александрович Куликов — врач-терапевт, заведующий терапевтическим отделением,</p><p>Тула</p></bio><bio xml:lang="en"><p>Ivan A. Kulikov — general practitioner, head of the therapeutic department</p><p>Tula </p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6120-4678</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Демихов</surname><given-names>В. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Demikhov</surname><given-names>V. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Валерий Григорьевич Демихов — д-р мед. наук, профессор, директор клиники гематологии, онкологии и иммунологии</p><p>Рязань </p></bio><bio xml:lang="en"><p>Valery Grigorievich Demikhov — Doctor of Medical Sciences, Professor, Director of the Hematology, Oncology and Immunology Clinic</p><p>Ryazan </p></bio><email xlink:type="simple">ikulikov0882@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ЧУЗ «Клиническая больница «РЖД-Медицина» г. Тула»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Private healthcare institution "Clinical hospital «RZD-Medicine" of the city of Tula»</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБОУ ВО «Рязанский государственный медицинский университет имени академика И.П. Павлова» Минздрава России, клиника гематологии, онкологии и иммунологии</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Ryazan State Medical University named after academician I.P. Pavlov, Hematology, Oncology and Immunology Clinic</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>27</day><month>01</month><year>2026</year></pub-date><volume>103</volume><issue>8-9</issue><fpage>647</fpage><lpage>653</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Куликов И.А., Демихов В.Г., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Куликов И.А., Демихов В.Г.</copyright-holder><copyright-holder xml:lang="en">Kulikov I.A., Demikhov V.G.</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://www.clinmedjournal.com/jour/article/view/1267">https://www.clinmedjournal.com/jour/article/view/1267</self-uri><abstract><p>Анемия — это синдром, который часто встречается у пожилых людей и ассоциируется с плохим прогнозом. Этиологическая структура анемий пожилых (АП) отличается разнообразием. Одним из важнейших патогенетических механизмов развития анемий различной этиологии является неадекватная продукции эритропоэтина (ЭПО). Цель работы: выяснить распространенность анемий различной этиологии и адекватность продукции ЭПО в ответ на анемию среди пожилых пациентов. Материал и методы. Группа пациентовв количестве 210 человек, средний возраст 77,54 ± 8,47 года. Критерии исключения — злокачественное новообразование или онкогематологическое заболевание. Этиологические факторы АП определялись как дефицит железа (ЖДА), В12, фолиевой кислоты, воспаление (АВЗ), хроническая болезнь почек (ХБП) и их комбинации. Адекватность продукции ЭПО оценивалась по величине отношения логарифма определенного значения ЭПО к логарифму предполагаемого значения ЭПО (0/П lg ЭПО), полученного для эталонной группы пациентов и с помощью ковариационного анализа. Результаты. АП имеет одну причину развития только в 35,2% случаев, в остальных — это комбинация факторов. Этиологическая структура АП в зависимости от ведущего патогенетическго механизма: ЖДА — 9,5%, ЖДАс ХБП — 27%, ХБП с СКФ менее 60 мл/мин/1,73м2 — 13,8%, ХБП с СКФ менее 30 мл/мин/1,73 м2 — 7,6%, дефицит В12 — 9%, АВЗ — 14,8%, необъяснимая анемия пожилых (НАП) —18%. Неадекватная продукция ЭПО отмечалась в группах пациентов с ЖДА с ХБП, ХБП, АВЗ, НАП, в группах с ЖДА и В12-дефицтной анемии продукция ЭПО была адекватная. Выводы. Распространенность НАП зависит от критериев отбора. Примерно в 2/3случаев АП полиэтиологична, из-за чего точно разделить пожилых пациентов по этиологическому признаку анемии затруднительно. Причиной неадекватной продукции ЭПО при АП являются ХБП и воспаление. Неадекватность продукции ЭПО отмечается уже при снижении СКФ менее 60 мл/мин/1,73 м2.</p></abstract><trans-abstract xml:lang="en"><p>Anemia is a syndrome that often occurs in the elderly and is associated with a poor prognosis. The etiological structure of anemia in the elderly (AE) is diverse. One of the most important pathogenetic mechanisms for the development of anemia of various etiologies is inadequate production of erythropoietin (EPO). Objective: to determine the prevalence of anemia of various etiologies and the adequacy of EPO production in response to anemia among elderly patients. Material and methods. A group of 210 patients, the average age was 77.54 ± 8.47 years. The exclusion criteria – malignant neoplasm or oncohematological disease. Etiological factors of AE were defined as iron deficiency (IDA), B12, folic acid, inflammation (ACD), chronic kidney disease (CKD) and their combinations. The adequacy of EPO production was assessed by the ratio of the logarithm of the determined EPO value to the logarithm of the expected EPO value (0/P lg EPO) obtained for the reference group of patients and using covariance analysis. Results. AE has one cause of development only in 35.2% of cases, in the rest it is a combination of factors. The etiologic structure of AE depending on the leading pathogenetic mechanism: IDA — 9.5%, IDA with CKD — 27%, CKD with GFR less than 60 ml/min/1.73 m2 — 13.8%, CKD with GFR less than 30 ml/min/1.73 m2 —7.6%, B 12 deficiency — 9%, ACD — 14.8%, unexplained anemia of the elderly (UAE) —18%. Inadequate EPO production was observed in the groups of patients with IDA with CKD, CKD, ACD, and UAE; in the groups with IDA and B12-deficient anemia, EPO production was adequate. Conclusions.The prevalence of UAE depends on the selection criteria. Approximately 2/3 of AE cases are polyetiologic. Due to the polyetiology of AE, it is difficult to accurately divide elderly patients by the etiologic sign of anemia. The cause of inadequate EPO production in AE is CKD and inflammation. Inadequate EPO production is observed already with a decrease in GFR to less than 60 ml/min/1.73 m2.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>анемия пожилых</kwd><kwd>дефицит железа</kwd><kwd>дефицит витамина В12</kwd><kwd>эритропоэтин</kwd><kwd>этиология анемии</kwd><kwd>хроническая болезнь почек</kwd><kwd>анемия воспаления</kwd><kwd>необъяснимая анемия пожилых</kwd></kwd-group><kwd-group xml:lang="en"><kwd>anemia of the elderly</kwd><kwd>iron deficiency</kwd><kwd>vitamin B12 deficiency</kwd><kwd>erythropoietin</kwd><kwd>etiology of anemia</kwd><kwd>chronic kidney disease</kwd><kwd>anemia of inflammation</kwd><kwd>unexplained anemia in the elderly</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">Gaskell H., Derry S., Andrew Moore R., McQuay H.J. Prevalence of anaemia in older persons: Systematic review. BMCGeriatr. 2008:8. 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