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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">seamed</journal-id><journal-title-group><journal-title xml:lang="ru">Морская медицина</journal-title><trans-title-group xml:lang="en"><trans-title>Marine Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2413-5747</issn><issn pub-type="epub">2587-7828</issn><publisher><publisher-name>Research Institute of Industrial and Maritime Medicine of the Federal Medical and Biological Agency</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.67821/2413-5747-2026-12-3-43-48</article-id><article-id custom-type="edn" pub-id-type="custom">ZLEFOC</article-id><article-id custom-type="elpub" pub-id-type="custom">seamed-1007</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 статьи</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Original articles</subject></subj-group></article-categories><title-group><article-title>Эффективность алпелисиба с фулвестрантом после прогрессирования на фулвестранте при PIK3CA-мутированном HR+HER2- метастатическом раке молочной железы: ретроспективный анализ данных реальной клинической практики</article-title><trans-title-group xml:lang="en"><trans-title>Effectiveness of alpelisib with fulvestrant after progression on fulvestrant among patients with PIK3CA-mutated HR+/HER2- metastatic breast cancer: a retrospective real-world data analysis</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>Абдулоева</surname><given-names>Н. Х.</given-names></name><name name-style="western" xml:lang="en"><surname>Abduloeva</surname><given-names>N. Kh.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Абдулоева Нуринисо Хамдуллоевна — кандидат медицинских наук, врач-онколог, заместитель директора по амбулаторно-поликлинической работе</p><p>197758, Санкт-Петербург, пос. Песочный, Ленинградская ул., д. 68А</p></bio><bio xml:lang="en"><p>Nuriniso Kh. Abduloeva – Cand. of Sci. (Med.), oncologist, Deputy Director for Outpatient and Polyclinic Work</p><p>197758, Saint Petersburg, Pesochny, Leningradskaya Str., 68A</p></bio><email xlink:type="simple">nurinisoabduloeva@gmail.com</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>Моисеенко</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Moiseenko</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Моисеенко Владимир Михайлович — доктор медицинских наук, профессор, член-корреспондент РАН, директор</p><p>197758, Санкт-Петербург, пос. Песочный, Ленинградская ул., д. 68А</p></bio><bio xml:lang="en"><p>Vladimir M. Moiseenko – Dr. of Sci. (Med.), Professor, Corresponding Member of the Russian Academy of Sciences, Director</p><p>197758, Saint Petersburg, Pesochny, Leningradskaya St., Building 68A</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Жабина</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Zhabina</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Жабина Альбина Сергеевна — кандидат медицинских наук, заведующая отделением централизованного разведения противоопухолевых препаратов</p><p>197758, Санкт-Петербург, пос. Песочный, Ленинградская ул., д. 68А</p></bio><bio xml:lang="en"><p>Albina S. Zhabina – Cand. of Sci. (Med.), Head of the Centralized Dilution Department of Antitumor Drugs</p><p>197758, Saint Petersburg, Pesochny, Leningradskaya St., Building 68A</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Скрипко</surname><given-names>О. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Skripko</surname><given-names>O. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Скрипко Ольга Александровна — врач-онколог поликлинического отделения</p><p>197758, Санкт-Петербург, пос. Песочный, Ленинградская ул., д. 68А</p></bio><bio xml:lang="en"><p>Olga A. Skripko – Outpatient Oncologist</p><p>197758, Saint Petersburg, Pesochny Settlement, Leningradskaya St., Building 68A</p></bio><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Санкт-Петербургский клинический научно-практический центр специализированных видов медицинской помощи (онкологический) имени Н. П. Напалкова</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Saint Petersburg Clinical Scientific and Practical Center for Specialized Types of Medical Care (Oncological) named after N. P. Napalkov</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>10</day><month>10</month><year>2026</year></pub-date><volume>12</volume><issue>3</issue><fpage>43</fpage><lpage>48</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Абдулоева Н.Х., Моисеенко В.М., Жабина А.С., Скрипко О.А., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Абдулоева Н.Х., Моисеенко В.М., Жабина А.С., Скрипко О.А.</copyright-holder><copyright-holder xml:lang="en">Abduloeva N.K., Moiseenko V.M., Zhabina A.S., Skripko O.A.</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://seamed.elpub.ru/jour/article/view/1007">https://seamed.elpub.ru/jour/article/view/1007</self-uri><abstract><p>ЦЕЛЬ. Оценка беспрогрессивной выживаемости (БПВ) и частоты объективного ответа при применении фулвестранта с алпелисибом в группе пациентов с люминальным PIK3CA+/HER2-метастатическом раке молочной железы (мРМЖ), получавших ранее фулвестрант.МАТЕРИАЛЫ И МЕТОДЫ. Мы ретроспективно оценили результаты лечения 45 пациенток с PIK3CA-мутированным HR+/HER2-мРМЖ, которые с 01.01.2021 по 01.01.2025 г. получали алпелисиб в комбинации с фулвестрантом после прогрессирования на фулвестранте в одной из предшествующих линий терапии в Государственном бюджетном учреждении здравоохранения «Санкт-Петербургский клинический научно-практический центр специализированных видов медицинской помощи (онкологический) имени Н. П. Напалкова».РЕЗУЛЬТАТЫ. В анализ были включены 45 пациенток, которые с 01.01.2021 по 01.01.2025 г. получали терапию алпелисибом в сочетании с фулвестрантом: 22,2 % (n = 10) — во второй, 46,7 % (n = 21) — в третьей, 24,4 % (n = 11) четвертой и 6,7 % (n = 3) пятой линиях терапии. Одну линию химиотерапии по поводу мРМЖ ранее получали 26,7% (n = 12) пациенток. У 46,7 % (n = 21) пациенток в исследовании была зафиксирована редукция дозы алпелисиба 1-й степени, у 1 пациентки — отмена терапии в связи с токсичностью. Медиана наблюдения для всей когорты составила 10 мес (IQR 5–12). Частичный ответ, оцененный по системе RECIST 1.1, был достигнут у 6,7 % (n = 3/45) пациенток, стабилизация — у 42,2 % (n = 19/45). Частота клинической пользы (ЧКП) составила 48,9 % (n = 22/45). Медиана беспрогрессивной выживаемости была 5,0 ± 0,75 мес (95 %; ДИ: 3,56–6,44). При этом у 11,1 % (n = 5/45) участниц исследования был зафиксирован ответ на терапию продолжительностью более 12 мес.ОБСУЖДЕНИЕ. Применение терапии фулвестрантом в сочетании с алпелисибом в группе пациенток с PIK3CA-мутированным HR+/HER2-мРМЖ, получавших фулвестрант в предшествующих линиях, показало клиническую пользу: ЧКП составила 48,9 %, медиана БПВ — 5,0 мес. Среди важных ограничений нашей работы — малая выборка пациенток. ЗАКЛЮЧЕНИЕ. Результаты ретроспективного анализа данных реальной клинической практики показывают, что применение комбинации фулвестранта с алпелисибом после прогрессирования на фулвестранте может быть эффективным.</p></abstract><trans-abstract xml:lang="en"><p>OBJECTIVE. The study aims to evaluate progression-free survival (PFS) and objective response rate (ORR) when using fulvestrant with alpelisib in a group of patients with luminal PIK3CA+/ HER2- mBC who previously received fulvestrant.MATERIALS AND METHODS. We retrospectively assessed the treatment outcomes of 45 patients with PIK3CA-mutated HR+HER2- mBC who received alpelisib in combination with fulvestrant after progression on fulvestrant in one of the previous lines of therapy at the State Budgetary Healthcare Institution “Saint Petersburg Clinical Scientific and Practical Center for Specialized Types of Medical Care (Oncologycal) named after N. P. Napalkov” from January 1, 2021, to January 1, 2025.RESULTS. The analysis included 45 patients who received alpelisib with fulvestrant from January 1, 2021, to January 1, 2025: 22.2 % (n = 10) in the second line, 46.7 % (n = 21) in the third line, 24.4 % (n = 11) in the fourth line, and 6.7 % (n = 3) in the fifth line of therapy. Chemotherapy for mBC had been previously administered to 26.7 % (n = 12) of the patients. A dose reduction of alpelisib was recorded in 46.7 % (n = 21) of patients, and one patient discontinued therapy due to toxicity. The median follow-up for the entire cohort was 10 months (IQR 5–12). A partial response, assessed by RECIST 1.1 criteria, was observed in 6.7 % (n = 3) of patients, and stabilization was noted in 42.2 % (n = 19). The median progression-free survival was 5.0 months ± 0.75 (95 %; CI: 3.56–6.44). Additionally, a response to therapy lasting more than 12 months was recorded in 11.1 % (n = 5) of study participants.CONCLUSIONS. The use of fulvestrant with alpelisib in patients with PIK3CA-mutated HR+/HER2- mBC who received fulvestrant in previous lines showed clinical benefit. Among the significant limitations of our study is the small sample size of patients.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>морская медицина</kwd><kwd>PIK3CA</kwd><kwd>алпелисиб</kwd><kwd>метастатический рак молочной железы</kwd><kwd>мРМЖ</kwd><kwd>фулвестрант</kwd><kwd>прогрессирование</kwd></kwd-group><kwd-group xml:lang="en"><kwd>marine medicine</kwd><kwd>maritime medicine</kwd><kwd>PIK3CA</kwd><kwd>alpelisib</kwd><kwd>metastatic breast cancer</kwd><kwd>mBC</kwd><kwd>fulvestrant</kwd><kwd>progression</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">Sobhani N., Roviello G., Corona S. P., et al. The prognostic value of PI3K mutational status in breast cancer: A metaanalysis. 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