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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">medalphabet</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинский алфавит</journal-title><trans-title-group xml:lang="en"><trans-title>Medical alphabet</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2078-5631</issn><issn pub-type="epub">2949-2807</issn><publisher><publisher-name>ООО «Альфмед»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.33667/2078-5631-2026-8-44-48</article-id><article-id custom-type="elpub" pub-id-type="custom">medalphabet-5092</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>Статьи</subject></subj-group></article-categories><title-group><article-title>Инаволисиб – новая стратегия терапии эндокринорезистентного PIK3CA-ассоциированного люминального HER2-негативного рака молочной железы</article-title><trans-title-group xml:lang="en"><trans-title>Inavolisib: a new treatment strategy for endocrine-resistant PIK3CA-associated luminal HER2-negative breast cancer</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5289-7866</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лубенникова</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Lubennikova</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лубенникова Елена Владимировна, к. м. н., с. н. с. отделения противоопухолевой лекарственной терапии № 1 отдела лекарственного лечения</p><p>Москва</p></bio><bio xml:lang="en"><p>Lubennikova Elena V., PhD Med Sci, senior researcher at Dept of Antitumor Drug Therapy No.1 Dept of Drug Treatment</p><p>Moscow</p></bio><email xlink:type="simple">lubennikova@yandex.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8936-3590</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Артамонова</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Artamonova</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Артамонова Елена Владимировна, д. м. н., проф., зав. отделением противоопухолевой лекарственной терапии № 1 отдела лекарственного лечения; проф. кафедры онкологии и лучевой терапии; зав. кафедрой онкологии и торакальной хирургии</p><p>Москва</p></bio><bio xml:lang="en"><p>Artamonova Elena V., Dr Med Sci (habil.), head of Dept of Antitumor Drug Therapy No.1 Dept of Drug Treatment;  professor at Dept of Oncology and Radiation Therapy; head of Dept of Oncology and Thoracic Surgery</p><p>Moscow</p></bio><email xlink:type="simple">artamonovae@mail.ru</email><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУ «Национальный медицинский исследовательский центр онкологии имени Н. Н. Блохина» Минздрава России</institution><country>Россия</country></aff><aff xml:lang="en"><institution>N. N. Blokhin National Medical Investigation Centre of Oncology</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБУ «Национальный медицинский исследовательский центр онкологии имени Н. Н. Блохина» Минздрава России; ФГАОУ ВО «Российский национальный исследовательский медицинский университет имени Н. И. Пирогова» Минздрава России (Пироговский университет); ГБУЗ Московской области «Московский областной научно-исследовательский клинический институт им. М. Ф. Владимирского»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>N. N. Blokhin National Medical Investigation Centre of Oncology; N. I. Pirogov Russian National Research Medical University (Pirogov University); M. F. Vladimirsky Moscow Regional Research Clinical Institute</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>04</day><month>06</month><year>2026</year></pub-date><volume>0</volume><issue>8</issue><issue-title>Диагностика и онкотерапия (1)</issue-title><fpage>44</fpage><lpage>48</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Лубенникова Е.В., Артамонова Е.В., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Лубенникова Е.В., Артамонова Е.В.</copyright-holder><copyright-holder xml:lang="en">Lubennikova E.V., Artamonova E.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://www.med-alphabet.com/jour/article/view/5092">https://www.med-alphabet.com/jour/article/view/5092</self-uri><abstract><p>Современные возможности гормоно-таргетной терапии люминального Her2-отрицательного метастатического рака молочной железы (мРМЖ) позволяют длительно контролировать болезнь, а использование ингибиторов CDk 4/6 в ранних линиях лечения значительно продлевает жизнь таких пациентов. На этом относительно благополучном фоне ярко выделяется подгруппа больных с PIK3CA-ассоциированными опухолями и прогрессированием заболевания на фоне адъювантной гормонотерапии (АГТ) или в течение 1 года после ее окончания (так называемая первичная или вторичная гормонорезистентность). Стандартная эндокрино- и химиотерапия оказываются малоэффективны, что приводит к бурному прогрессированию и ранней гибели пациентов. Внедрение в клиническую практику нового класса препаратов, нацеленных на ингибирование сигнального пути PI3K/AKT/mTOR, позволило расширить терапевтические возможности, повысив показатели выживаемости без прогрессирования и частоты объективных ответов. Однако достичь значимого повышения общей выживаемости длительное время не удавалось. Настоящим прорывом стало разработка стратегии тройной терапии гормонорезистентного PIK3CAmut люминального HER2-негативного мРМЖ, включающая назначение в 1-й линии лечения фулвестранта в комбинации с iCDK4/6 палбоциклибом и новым iPI3K инаволисибом. В настоящей публикации приводятся данные рандомизированного клинического исследования III фазы INAVO120, доказавшего эффективность и безопасность применения тройной комбинации «инаволисиб + палбоциклиб + фулвестрант» по сравнению со стандартным подходом «палбоциклиб + фулвестрант» у больных PIK3CA-ассоциированным люминальным HER2-отрицательным мРМЖ и прогрессированием во время проведения АГТ или в течение 1 года от ее завершения. Включение инаволисиба, по сравнению с группой контроля, статистически достоверно и клинически значимо улучшило все оцениваемые показатели эффективности, включая выживаемость без прогрессирования (медианы ВБП 17,2 мес. против 7,3 мес., ОР – 0,42; 95 % ДИ 0,32–0,55), частоту объективных ответов (ЧОО – 62,7 % против 28,0 %, p&lt;0,001) и общую выживаемость (медианы ОВ 34 мес. против 27 мес., ОР= 0,67; 95 % ДИ 0,48–0,94; р=0.02). Инаволисиб – первый ингибитор PI3K, значимо увеличивший продолжительность жизни пациентов с агрессивным вариантом люминального HER2- мРМЖ. Триплет «инаволисиб + палбоциклиб + фулвестрант» представляется новым стандартом I линии терапии PIK3CAmut ГР+HER2- мРМЖ с ранним прогрессированием после проведенного радикального лечения.</p></abstract><trans-abstract xml:lang="en"><p>Current capabilities of endocrine-targeted therapy for HR+HER2-negative metastatic breast cancer (mBC) enable long-term disease control, while the use of CDK4/6 inhibitors in early lines of treatment significantly increases overall survival. Against this relatively favorable backdrop, a distinct subgroup emerges: patients with PIK3CA-associated tumors who progress during adjuvant endocrine therapy (AET) or within 12 months of its completion (primary or secondary endocrine resistance). Standard endocrine therapy and chemotherapy show limited efficacy in this cohort, leading to rapid progression and early mortality. The clinical introduction of a new class of agents targeting the PI3K/AKT/mTOR signaling pathway has expanded therapeutic options, improving progression-free survival (PFS) and objective response rates (ORR). However, significant improvement in overall survival has not been achieved for a long time. The development of a triple-therapy strategy for hormone-resistant PIK3CA-mut luminal HER2-negative mBC (metastatic breast cancer) represents a true breakthrough. It involves the use of fulvestrant in combination with the CDK4/6 inhibitor (iCDK4/6) palbociclib and the novel PI3K inhibitor (iPI3K) inavolisib as first-line treatment. This publication presents data from the phase III randomised clinical trial INAVO120, which demonstrated the efficacy and safety of the triple combination “inavolisib + palbociclib + fulvestrant” compared with the standard approach “palbociclib + fulvestrant” in patients with PIK3CA-associated HR+HER2-negative metastatic breast cancer who experienced disease progression during adjuvant endocrine therapy (AET) or within 1 year after its completion. The addition of inavolisib, compared with the control group, statistically significantly and clinically meaningfully improved all assessed efficacy endpoints, including: progression-free survival (PFS) (median PFS of 17.2 months vs. 7.3 months (hazard ratio [HR] 0.42; 95 % confidence interval [CI] 0.32–0.55); objective response rate (ORR): 62.7 % vs. 28.0 % (p&lt;0.001); overall survival (median OS of 34 months vs. 27 months (HR 0.67; 95 % CI 0.48–0.94; p=0.02)). Inavolisib is the first PI3K inhibitor that has significantly increased the life expectancy of patients with an aggressive type of HR+HER2-negative metastatic breast cancer. The triplet regimen “inavolisib + palbociclib + fulvestrant” represents a new standard of first-line therapy for PIK3CA-mut HR+HER2-negative mBC with early progression after radical treatment.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>люминальный рак молочной железы</kwd><kwd>инаволисиб</kwd><kwd>PIK3CA</kwd><kwd>ингибитор PI3K</kwd><kwd>PI3K/AKT/mTOR</kwd><kwd>эндокринорезистентность</kwd></kwd-group><kwd-group xml:lang="en"><kwd>luminal breast cancer</kwd><kwd>HR+HER2-negative mBC</kwd><kwd>inavolisib</kwd><kwd>PIK3CA</kwd><kwd>PI3K inhibitor</kwd><kwd>PI3K/AKT/mTOR</kwd><kwd>endocrine resistance</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">Cancer Genome Atlas Network. 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