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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Almanac of Clinical Medicine</journal-id><journal-title-group><journal-title xml:lang="en">Almanac of Clinical Medicine</journal-title><trans-title-group xml:lang="ru"><trans-title>Альманах клинической медицины</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2072-0505</issn><issn publication-format="electronic">2587-9294</issn><publisher><publisher-name xml:lang="en">Moscow Regional Research and Clinical Institute (MONIKI)</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">849</article-id><article-id pub-id-type="doi">10.18786/2072-0505-2018-46-4-314-322</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ARTICLES</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ОРИГИНАЛЬНЫЕ СТАТЬИ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Expression of the phosphorylated variant of the AKT1-kinase (p-AKT1) in well-differentiated pancreatic neuroendocrine tumors: immunohistochemical evaluation</article-title><trans-title-group xml:lang="ru"><trans-title>Экспрессия фосфорилированного варианта АКТ1-киназы (р-АКТ1) в высокодифференцированных нейроэндокринных опухолях поджелудочной железы: иммуногистохимическое исследование</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Delektorskaya</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Делекторская</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Vera V. Delektorskaya – </bold>MD, PhD, Head of Histochemistry and Electron Microscopy Laboratory, Department of Pathology of Human Tumors </p><p><italic>24 Kashirskoe shosse, Moscow, 115478</italic></p></bio><bio xml:lang="ru"><p><bold>Делекторская Вера Владимировна – </bold>доктор медицинских наук, заведующая лабораторией гистохимии и электронной микроскопии отдела патологической анатомии опухолей человека</p></bio><email>delektorskaya@yandex.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Solov'eva</surname><given-names>O. N.</given-names></name><name xml:lang="ru"><surname>Соловьева</surname><given-names>О. Н.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Olesya N. Solov'eva – </bold>MD, Postgraduate Student, Department of Liver and Рancreatic Tumors</p><p><italic>24 Kashirskoe shosse, Moscow, 115478</italic></p></bio><bio xml:lang="ru"><p><bold>Соловьева Олеся Николаевна – </bold>аспирант хирургического отделения опухолей печени и поджелудочной железы</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Chemeris</surname><given-names>G. Yu.</given-names></name><name xml:lang="ru"><surname>Чемерис</surname><given-names>Г. Ю.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Galina Yu. Chemeris – </bold>PhD (in Biology), Senior Research Fellow, Department of Pathology of Human Tumors </p><p><italic>24 Kashirskoe shosse, Moscow, 115478</italic></p></bio><bio xml:lang="ru"><p><bold>Чемерис Галина Юрьевна – </bold>кандидат биологических наук, старший научный сотрудник отдела патологической анатомии опухолей человека</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Patyutko</surname><given-names>Yu. I.</given-names></name><name xml:lang="ru"><surname>Патютко</surname><given-names>Ю. И.</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p><bold>Yuri I. Patyutko – </bold>MD, PhD, Professor, Chief Research Fellow, Department of Liver and Рancreatic Tumors </p><p><italic>24 Kashirskoe shosse, Moscow, 115478</italic></p></bio><bio xml:lang="ru"><p><bold>Патютко Юрий Иванович – </bold>доктор медицинских наук, профессор, главный научный сотрудник хирургического отделения опухолей печени и поджелудочной железы</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">N.N. Blokhin National Medical Research Centre of Oncology</institution></aff><aff><institution xml:lang="ru">ФГБУ «Национальный медицинский исследовательский центр онкологии им. Н.Н. Блохина» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2018-09-26" publication-format="electronic"><day>26</day><month>09</month><year>2018</year></pub-date><volume>46</volume><issue>4</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>314</fpage><lpage>322</lpage><history><date date-type="received" iso-8601-date="2018-09-23"><day>23</day><month>09</month><year>2018</year></date><date date-type="accepted" iso-8601-date="2018-09-23"><day>23</day><month>09</month><year>2018</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2018, Delektorskaya V.V., Solov'eva O.N., Chemeris G.Y., Patyutko Y.I.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2018, Делекторская В.В., Соловьева О.Н., Чемерис Г.Ю., Патютко Ю.И.</copyright-statement><copyright-year>2018</copyright-year><copyright-holder xml:lang="en">Delektorskaya V.V., Solov'eva O.N., Chemeris G.Y., Patyutko Y.I.</copyright-holder><copyright-holder xml:lang="ru">Делекторская В.В., Соловьева О.Н., Чемерис Г.Ю., Патютко Ю.И.</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/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://almclinmed.ru/jour/article/view/849">https://almclinmed.ru/jour/article/view/849</self-uri><abstract xml:lang="en"><p><bold>Background: </bold>Well-differentiated pancreatic neuroendocrine tumors (pNETs) represent a group of rare epithelial neoplasms with a highly variable clinical course. AKT1 is one of the most frequently activated protein kinases in pNETs, which promotes the tumor growth and is of interest as a prognostic factor and a target for new treatment approaches.</p><p><bold>Aim: </bold>To study the expression of the phosphorylated variant of AKT1-kinase (p-AKT1) in primary pNETs and their liver metastases and to correlate the results with various clinical and pathological parameters and the disease prognosis.</p><p><bold>Materials and methods: </bold>P-AKT1 expression was studied by the immunohistochemical analysis of the primary lesions and liver metastases in 52 pNETs patients.</p><p><bold>Results: </bold>A high level of cytoplasmic and/or nuclear immunoreactivity was detected in 24/52 of the primary pNETs (46.2%) and in 16/27 of their liver metastases (59.3%). p-AKT1 expression was observed in 3 (21.4%) of NET grade (G) 1, in 14 (46.7%) of NET G2, and in 7 (87.5%) of NET G3. p-AKT1 expression was more frequently identified in pNET G3 category and increased during the tumor progression in metachronous liver metastases, as compared to the corresponding primary tumor. In addition, p-AKT1 positivity was significantly associated with an increase of grade from G1 to G3 (p = 0.004), the Ki-67 index (p = 0.029), the pTNM stage (p = 0.0008), perineural invasion (p = 0.031) and a decrease in disease-free survival (p = 0.05).</p><p><bold>Conclusion: </bold>The results suggest that p-АКТ1 plays an important role in the pathogenesis of pNETs and may be an additional criterion for assessment of the prognosis and treatment effectiveness in this type of tumors.</p></abstract><trans-abstract xml:lang="ru"><p/><p><bold>Актуальность. </bold>Высокодифференцированные нейроэндокринные опухоли поджелудочной железы (НЭО ПЖ) образуют группу редких эпителиальных новообразований с крайне вариабельным клиническим течением. AKT1 – одна из наиболее часто активируемых протеинкиназ в НЭО ПЖ, способствует усилению опухолевого роста и представляет интерес в качестве фактора прогноза и мишени для поиска новых подходов к лечению.</p><p><bold>Цель – </bold>изучить особенности экспрессии фосфорилированного варианта АКТ1-киназы (p-AKT1) в первичных НЭО ПЖ и их метастазах в печени и определить корреляцию результатов с основными клинико-морфологическими характеристиками опухоли и прогнозом.</p><p><bold>Материал и методы. </bold>Особенности экспрессии р-АКТ1 были изучены с помощью иммуногистохимического анализа в первичных очагах и метастазах в печени 52 больных НЭО ПЖ.</p><p><bold>Результаты. </bold>Высокий уровень цитоплазматической и/или ядерной иммунореактивности был выявлен в 24 (46,2%) из 52 первичных НЭО ПЖ и в 16 (59,3%) из 27 метастазов НЭО ПЖ в печени. Экспрессия р-АКТ1 наблюдалась в 3 (21,4%) НЭО G1, в 14 (46,7%) НЭО G2 и в 7 (87,5%) НЭО G3. Экспрессия p-AKT1 чаще выявлялась в категории НЭО G3 и увеличивалась в процессе опухолевой прогрессии в метахронных метастазах в печени по сравнению с соответствующей первичной опухолью. Кроме того, р-АКТ1-позитивность была статистически значимо связана с увеличением степени злокачественности от G1 до G3 (р = 0,004), индекса Ki-67 (р = 0,029), стадии рTNM (р = 0,0008), наличием периневральной инвазии (р = 0,031) и уменьшением безрецидивной выживаемости (р = 0,05).</p><bold>Заключение. </bold>Полученные результаты демонстрируют, что р-АКТ1 играет важную роль в патогенезе НЭО ПЖ и может служить дополнительным параметром оценки прогноза и эффективности лечения опухолей данного типа.</trans-abstract><kwd-group xml:lang="en"><kwd>neuroendocrine tumor</kwd><kwd>pancreas</kwd><kwd>р-АКТ1</kwd><kwd>immunohistochemistry</kwd><kwd>prognosis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>нейроэндокринная опухоль</kwd><kwd>поджелудочная железа</kwd><kwd>р-АКТ1</kwd><kwd>иммуногистохимия</kwd><kwd>прогноз</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>1. Ohmoto A, Rokutan H, Yachida S. 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