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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">medsovet</journal-id><journal-title-group><journal-title xml:lang="ru">Медицинский Совет</journal-title><trans-title-group xml:lang="en"><trans-title>Meditsinskiy sovet = Medical Council</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2079-701X</issn><issn pub-type="epub">2658-5790</issn><publisher><publisher-name>REMEDIUM GROUP Ltd.</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.21518/ms2023-384</article-id><article-id custom-type="elpub" pub-id-type="custom">medsovet-7850</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>КОМОРБИДНЫЙ ПАЦИЕНТ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>COMORBID PATIENT</subject></subj-group></article-categories><title-group><article-title>Фармакогенетические маркеры токсичности химиотерапии по схеме FOLFOX/XELOX у пациентов с опухолями желудочно-кишечного тракта: проспективное обсервационное исследование</article-title><trans-title-group xml:lang="en"><trans-title>Pharmacogenetic markers of toxicity of FOLFOX/XELOX chemotherapy in patients with gastrointestinal tumors: a prospective observational study</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5516-7367</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Федоринов</surname><given-names>Д. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Fedorinov</surname><given-names>D. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Федоринов Денис Сергеевич - старший лаборант  кафедры  онкологии  и паллиативной медицины имени академика А.И. Савицкого, РМАНПО; врач-онколог  отделения   химиотерапии   №1,  ГКОБ  №1  ДЗМ.</p><p>125993, Москва, ул. Баррикадная, д. 2/1, стр. 1; 117152, Россия, Москва, Загородное шоссе, д. 18а</p></bio><bio xml:lang="en"><p>Denis S. Fedorinov - Senior Assistant of the Department of Oncology and Palliative Medicine named after Acad. A.I. Savitsky, Russian Medical Academy of Continuous Professional  Education; Oncologist, Chemotherapy  Department No 1, City Clinical Cancer Hospital No. 1.</p><p>2/1, Bldg. 1, Barrikadnaya St., Moscow, 125993; 18а, Zagorodnoye  Shosse, Moscow, 117152</p></bio><email xlink:type="simple">deni_fe@mail.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/0000-0002-7281-3591</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лядов</surname><given-names>В. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Lyadov</surname><given-names>V. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лядов Владимир Константинович – доктор медицинских наук, профессор,  профессор   кафедры  онкологии  и  паллиативной  медицины  имени  академика А.И. Савицкого, РМАНПО; заведующий 4-м онкологическим отделением, ГКОБ  №1  ДЗМ; заведующий кафедрой онкологии, Новокузнецкий ГИУВ  – филиал РМАНПО.</p><p>125993, Москва, ул. Баррикадная, д. 2/1, стр. 1; 117152, Москва, Загородное шоссе, д. 18а; 654005, Кемеровская область, Новокузнецк, проспект Строителей, д. 5</p></bio><bio xml:lang="en"><p>Vladimir K. Lyadov - Dr. Sci. (Med.), Professor, Professor of the Department of Oncology and Palliative  Medicine named  after Acad. A.I. Savitsky, Russian Medical Academy of Continuous  Professional  Education; Head of Oncology Department No 4, City Clinical Cancer Hospital No. 1; Head of Oncology Department, Novokuznetsk  State  Institute  of Postgraduate Medical Education  – branch  of Russian Medical Academy of Continuous  Professional  Education.</p><p>2/1, Bldg. 1, Barrikadnaya St., Moscow, 125993; 18а, Zagorodnoye  Shosse, Moscow, 117152; 5, Stroitelei  Ave., Novokuznetsk, Kemerovo Region, 654005</p></bio><email xlink:type="simple">vlyadov@gmail.com</email><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9001-1499</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Абдуллаев</surname><given-names>Ш. П.</given-names></name><name name-style="western" xml:lang="en"><surname>Abdullayev</surname><given-names>Sh. P.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Абдуллаев Шерзод Пардабоевич – кандидат медицинских наук, заведующий отделом предиктивных и прогностических биомаркеров.</p><p>125993, Москва, ул. Баррикадная, д. 2/1, стр. 1</p></bio><bio xml:lang="en"><p>Sherzod P. Abdullayev - Cand. Sci. (Med.), Head of Department of Predictive and Prognostic Biomarkers, Russian Medical Academy of Continuous Professional  Education.</p><p>2/1, Bldg. 1, Barrikadnaya St., Moscow, 125993</p></bio><email xlink:type="simple">sherzodx5@gmail.com</email><xref ref-type="aff" rid="aff-3"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3194-4410</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Качанова</surname><given-names>А. A.</given-names></name><name name-style="western" xml:lang="en"><surname>Kachanova</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Качанова Анастасия Алексеевна - младший научный сотрудник отдела предиктивных и прогностических биомаркеров.</p><p>125993, Москва, ул. Баррикадная, д. 2/1, стр. 1</p></bio><bio xml:lang="en"><p>Anastasia A. Kachanova - Junior Research Associate of Department of Predictive and Prognostic Biomarkers, Russian Medical Academy of Continuous Professional  Education.</p><p>2/1, Bldg. 1, Barrikadnaya St., Moscow, 125993</p></bio><email xlink:type="simple">aakachanova@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/0000-0002-4971-2629</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гейдаров</surname><given-names>Р. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Heydarov</surname><given-names>R. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Гейдаров Рустам Нураддин-оглы - сотрудник лаборатории биологических микрочипов.</p><p>119991, Москва, ул. Вавилова, д. 32</p></bio><bio xml:lang="en"><p>Rustam N. Heydarov - Research Associate of Laboratory for Biological Microchips, Engelhardt  Institute  of Molecular Biology, Russian Academy of Sciences.</p><p>32, Vavilov St., Moscow, 119991</p></bio><email xlink:type="simple">rustam.heydarov@gmail.com</email><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6037-730X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шашков</surname><given-names>И. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Shashkov</surname><given-names>I. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Шашков  Игорь Александрович – кандидат химических наук, сотрудник  лаборатории   биологических  микрочипов.</p><p>119991, Москва, ул. Вавилова, д. 32</p></bio><bio xml:lang="en"><p>Igor A. Shashkov - Cand. Sci. (Chem.), Research Associate of Laboratory for Biological Microchips, Engelhardt  Institute  of Molecular Biology, Russian Academy of Sciences.</p><p>32, Vavilov St., Moscow, 119991</p></bio><email xlink:type="simple">igorshashkov@bk.ru</email><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4894-1304</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Михайлович</surname><given-names>В. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Mikhailovich</surname><given-names>V. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Михайлович Владимир Михайлович – доктор биологических наук, заместитель заведующего  лабораторей биологических микрочипов.</p><p>119991, Москва, ул. Вавилова, д. 32</p></bio><bio xml:lang="en"><p>Vladimir M. Mikhailovich - Dr. Sci. (Biol.), Deputy Head of Laboratory for Biological Microchips, Engelhardt  Institute  of Molecular Biology, Russian Academy of Sciences.</p><p>32, Vavilov St., Moscow, 119991</p></bio><email xlink:type="simple">1351177@mail.ru</email><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-6043-1182</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Суржиков</surname><given-names>С. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Surzhikov</surname><given-names>S. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Суржиков Сергей Алексеевич - сотрудник лаборатории  биологических микрочипов.</p><p>119991, Москва, ул. Вавилова, д. 32</p></bio><bio xml:lang="en"><p>Sergey A. Surzhikov - Research Associate of Laboratory for Biological Microchips, Engelhardt  Institute  of Molecular Biology, Russian Academy of Sciences.</p><p>32, Vavilov St., Moscow, 119991</p></bio><email xlink:type="simple">ssergey77@mail.ru</email><xref ref-type="aff" rid="aff-4"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Лядова</surname><given-names>М. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Lyadova</surname><given-names>M. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Лядова Марина Александровна - кандидат медицинских наук, ассистент кафедры онкологии, Новокузнецкий ГИУВ  – филиал РМАНПО; заведующая отделением  химиотерапии №1, ГКОБ №1 ДЗМ.</p><p>125993, Москва, ул. Баррикадная, д. 2/1, стр. 1; 654005, Кемеровская область, Новокузнецк, проспект Строителей, д. 5</p></bio><bio xml:lang="en"><p>Marina A. Lyadova - Cand. Sci. (Med.), Assistant at the  Department of Oncology, Novokuznetsk State  Institute  of Postgraduate Medical Education – branch of Russian Medical Academy of Continuous  Professional  Education; Head of Department of Chemotherapy  No. 1, City Clinical Cancer Hospital  No. 1.</p><p>2/1, Bldg. 1, Barrikadnaya St., Moscow, 125993; 5, Stroitelei  Ave., Novokuznetsk, Kemerovo Region, 654005</p></bio><email xlink:type="simple">dr.lyadova@gmail.com</email><xref ref-type="aff" rid="aff-5"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0227-2651</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сычев</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Sychev</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сычев Иван Витальевич - аспирант кафедры факультетской терапии с курсами физиотерапии, лечебной  физкультуры</p><p>430005, Республика Мордовия, Саранск, ул. Большевистская, д. 68</p></bio><bio xml:lang="en"><p>Ivan V. Sychev - Postgraduate of the  Intermediate Level Therapy Department with Physiotherapy, Therapeutic  Exercise Courses, National  Research Ogarev Mordovia State University.</p><p>68, Bolshevistskaya  St., Saransk, 430005</p></bio><email xlink:type="simple">sychev_iv@bk.ru</email><xref ref-type="aff" rid="aff-6"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Галкин</surname><given-names>В. Н.</given-names></name><name name-style="western" xml:lang="en"><surname>Galkin</surname><given-names>V. N.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Галкин Всеволод Николаевич – доктор медицинских наук, профессор, главный врач ГКОБ №1 ДЗМ.</p><p>117152, Москва, Загородное шоссе, д. 18а</p></bio><bio xml:lang="en"><p>Vsevolod N. Galkin - Dr. Sci. (Med.), Professor, Chief Medical Officer, City Clinical Cancer Hospital No. 1.</p><p>18а,Zagorodnoye Shosse, Moscow, 117152</p></bio><email xlink:type="simple">Vsgalkin@mail.ru</email><xref ref-type="aff" rid="aff-7"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0995-1801</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Поддубная</surname><given-names>И. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Poddubnaya</surname><given-names>I. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Поддубная Ирина Владимировна - академик РАН, доктор медицинских наук, профессор, проректор по лечебной работе и международному сотрудничеству, заведующая кафедрой  онкологии и паллиативной медицины.</p><p>125993, Москва, ул. Баррикадная, д. 2/1, стр. 1</p></bio><bio xml:lang="en"><p>Irina V. Poddubnaya - Dr. Sci. (Med.), Professor,Acad. RAS, Pro-Rector for Clinical Care and International Collaboration, Head of Department of Oncology and Palliative Medicine, Russian Medical Academy of Continuous Professional  Education.</p><p>2/1, Bldg. 1, Barrikadnaya St., Moscow, 125993</p></bio><email xlink:type="simple">ivprectorat@inbox.ru</email><xref ref-type="aff" rid="aff-8"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4496-3680</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сычев</surname><given-names>Д. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Sychev</surname><given-names>D. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сычев Дмитрий Алексеевич - академик РАН, доктор медицинских наук, профессор, ректор.</p><p>125993, Москва, ул. Баррикадная, д. 2/1, стр. 1</p></bio><bio xml:lang="en"><p>Dmitry A. Sychev - Dr. Sci. (Med.), Professor, Acad. RAS, Rector, Russian Medical Academy of Continuous  Professional  Education.</p><p>2/1, Bldg. 1, Barrikadnaya St., Moscow, 125993</p></bio><email xlink:type="simple">dimasychev@mail.ru</email><xref ref-type="aff" rid="aff-8"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Российская медицинская академия непрерывного  профессионального  образования; Городская клиническая онкологическая больница №1</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Medical Academy of Continuous  Professional  Education; City Clinical Cancer Hospital No. 1</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>Российская медицинская академия непрерывного  профессионального образования; Городская клиническая онкологическая больница №1; Новокузнецкий государственный институт усовершенствования врачей – филиал Российской медицинской академии непрерывного  профессионального  образования</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Medical Academy of Continuous  Professional  Education; City Clinical Cancer Hospital No. 1; Novokuznetsk State  Institute  of Postgraduate Medical Education – branch of Russian Medical Academy of Continuous Professional  Education</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-3"><aff xml:lang="ru"><institution>Российская медицинская академия непрерывного профессионального образования</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Medical Academy of Continuous Professional Education</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-4"><aff xml:lang="ru"><institution>Институт молекулярной биологии имени В.А. Энгельгардта Российской академии наук</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Engelhardt Institute of Molecular Biology, Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-5"><aff xml:lang="ru"><institution>Российская медицинская академия непрерывного профессионального образования; Новокузнецкий государственный институт усовершенствования врачей – филиал Российской медицинской академии непрерывного профессионального образования</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Medical Academy of Continuous  Professional  Education; Novokuznetsk State  Institute  of Postgraduate Medical Education – branch of Russian Medical Academy of Continuous Professional  Education</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-6"><aff xml:lang="ru"><institution>Национальный исследовательский Мордовский государственный университет имени Н.П. Огарева</institution><country>Россия</country></aff><aff xml:lang="en"><institution>National Research Ogarev Mordovia State University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-7"><aff xml:lang="ru"><institution>Городская клиническая онкологическая больница №1</institution><country>Россия</country></aff><aff xml:lang="en"><institution>City Clinical Cancer Hospital No. 1</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-8"><aff xml:lang="ru"><institution>Российская медицинская академия непрерывного  профессионального  образования</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Russian Medical Academy of Continuous Professional Education</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>02</day><month>11</month><year>2023</year></pub-date><volume>0</volume><issue>18</issue><fpage>175</fpage><lpage>184</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Федоринов Д.С., Лядов В.К., Абдуллаев Ш.П., Качанова А.A., Гейдаров Р.Н., Шашков И.А., Михайлович В.М., Суржиков С.А., Лядова М.А., Сычев И.В., Галкин В.Н., Поддубная И.В., Сычев Д.А., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Федоринов Д.С., Лядов В.К., Абдуллаев Ш.П., Качанова А.A., Гейдаров Р.Н., Шашков И.А., Михайлович В.М., Суржиков С.А., Лядова М.А., Сычев И.В., Галкин В.Н., Поддубная И.В., Сычев Д.А.</copyright-holder><copyright-holder xml:lang="en">Fedorinov D.S., Lyadov V.K., Abdullayev S.P., Kachanova A.A., Heydarov R.N., Shashkov I.A., Mikhailovich V.M., Surzhikov S.A., Lyadova M.A., Sychev I.V., Galkin V.N., Poddubnaya I.V., Sychev D.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://www.med-sovet.pro/jour/article/view/7850">https://www.med-sovet.pro/jour/article/view/7850</self-uri><abstract><sec><title>Введение</title><p>Введение.  Стандартом лечения  распространенных  стадий  рака  желудка, толстой и прямой  кишки является  системная химиотерапия (ХТ) на основе препаратов  оксалиплатин, 5-фторурацил, капецитабин, для которой характерно  частое развитие тяжелых нежелательных явлений (НЯ). Результаты трансляционных исследований на российской популяции пациентов ограниченны, необходимо  изучение фармакогенетических маркеров  развития НЯ.</p></sec><sec><title>Цель</title><p>Цель. Изучить частоту носительства аллельных вариантов генов DPYD, GSTP1, MTHFR, XPC, ERCC1, TYMS и их связь с развитием НЯ при проведении  паллиативной ХТ по схеме FOLFOX/XELOX.</p></sec><sec><title>Материалы  и методы</title><p>Материалы  и методы. В проспективное  обсервационное  исследование   включено  166  пациентов  (67 – рак  желудка, 99 – колоректальный рак). Всем пациентам до начала ХТ было проведено  фармакогенетическое тестирование  методом гибридизационного   анализа   на  биологических   микрочипах   (DPYD   (rs2297595   и  rs75017182),  MTHFR (rs1801133), XPC (rs2228001), TYMS (rs11280056),  ERCC1 (rs3212986))  и ПЦР (GSTP1 (rs1695), ERCC1 (rs11615)). Был проведен  анализ распределения частот генотипов между группами пациентов с развитием  серьезных НЯ и без них.</p></sec><sec><title>Результаты</title><p>Результаты. В процессе  лечения НЯ развились у 97,7% пациентов, на долю серьезных НЯ приходится 54,2%. По результатам однофакторного  анализа  с развитием  тяжелой нейтропении  ассоциировались генотипы ТС гена  DPYD  rs2297595, ОШ = 3,0 (95% ДИ 1,2–7,3, p = 0,025), GG гена GSTP1 rs1695, ОШ = 2,9 (95% ДИ 1,02–8,6, p = 0,038). Генотипы АА и AG гена GSTP1 rs1695 ассоциировались с повышением шанса дозолимитирующей токсичности для оксалиплатина в 7,3 раза (ОШ) (95% ДИ 1,186–56,681, p = 0,04). В структуре многофакторной модели при пошаговом включении и исключении для исхода   тяжелой  нейтропении   остался   единственный   положительный  предиктор   – генотип  ТТ  rs2297595   гена   DPYD (B ± SE = -1,103 ± 0,503; DI [-2,090; -0,116]; р = 0,028).</p></sec><sec><title>Выводы</title><p>Выводы. Результаты  проведенного   исследования  позволили  выявить возможные  маркеры  токсичности химиотерапии по схеме FOLFOX/XELOX.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introdiction</title><p>Introdiction.   Systemic  chemotherapy  (CT)  based   on  oxaliplatin,   5-fluorouracil,  capecitabine  is  the   standard  of  treatment for advanced  gastric, colorectal  and rectal cancer, which is characterized by frequent  development of severe adverse  events  (AEs). The results of translational studies in the Russian patient  population are limited, it is necessary to study pharmacogenetic markers. Aim. To study the frequency of carrying allelic variants  of DPYD, GSTP1, MTHFR, XPC, ERCC1, TYMS genes  and their association with the development of AEs during palliative  treatment with FOLFOX/XELOX.</p></sec><sec><title>Materials and methods</title><p>Materials and methods.  A total  of 166  patients (67 gastric  cancer, 99 colorectal  cancer)  were  included  in the  prospective observational study. All patients underwent pharmacogenetic testing  by hybridization  analysis  on  biological  microarrays (DPYD (rs2297595  and rs75017182), MTHFR (rs1801133), XPC (rs2228001), TYMS (rs11280056), ERCC1 (rs3212986)) and PCR (GSTP1 (rs1695), ERCC1 (rs11615)) before  starting  CT. The genotype  frequency distribution was analyzed  between the groups of patients with and without  the development of severe AEs.</p></sec><sec><title>Results</title><p>Results. AEs developed in 97.7% of patients, severe  AEs accounting for 54.2%. According to the results  of univariate  analysis, TC genotype  of DPYD gene  rs2297595  OR = 3.0 (95% CI 1.2–7.3, p = 0.025), GG genotype  of GSTP1 gene  rs1695  OR = 2.9 (95%   CI 1.02–8.6,  p = 0.038) were  associated with  the  development of severe  neutropenia. In multivariate analysis  TT genotype   rs2297595   of the  DPYD gene  remained   the  only predictor  of severe  neutropenia (B ± SE = -1.103  ± 0.503; DI [-2.090; -0.116]; p = 0.028).</p></sec><sec><title>Conclusions</title><p>Conclusions. The results  of this study allowed  us to identify possible  markers of toxicity of FOLFOX/XELOX chemotherapy.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>рак желудка</kwd><kwd>колоректальный рак</kwd><kwd>фармакогенетическое тестирование</kwd><kwd>DPYD</kwd><kwd>ERCC1</kwd><kwd>TYMS</kwd></kwd-group><kwd-group xml:lang="en"><kwd>gastric cancer</kwd><kwd>colorectal  cancer</kwd><kwd>pharmacogenetic testing</kwd><kwd>DPYD</kwd><kwd>ERCC1</kwd><kwd>TYMS</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа проводилась при поддержке  гранта Российского научного фонда №20-75-10158 «Фармакогенетические и фармакокинетические подходы к химиотерапии опухолей желудочно-кишечного тракта на основе анализа состава тела».</funding-statement><funding-statement xml:lang="en">The work was conducted with the support  of Russian Science Foundation  Grant No. 20-75-10158 – Pharmacogenetic and pharmacokinetic approaches to gastrointestinal cancer chemotherapy based  on total  body composition.</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Каприн АД, Старинский ВВ, Петрова ГВ (ред.). Состояние онкологической помощи населению России в 2018 году. М.: МНИОИ им. П.А. Герцена – филиал ФГБУ «НМИЦ радиологии» Минздрава России; 2019. 236 с. Режим доступа: https://oncology-association.ru/wp-content/uploads/2020/09/sostoyanie_2018.pdf?ysclid=lnis28yzzl945263948.</mixed-citation><mixed-citation xml:lang="en">Каприн АД, Старинский ВВ, Петрова ГВ (ред.). Состояние онкологической помощи населению России в 2018 году. М.: МНИОИ им. П.А. Герцена – филиал ФГБУ «НМИЦ радиологии» Минздрава России; 2019. 236 с. Режим доступа: https://oncology-association.ru/wp-content/uploads/2020/09/sostoyanie_2018.pdf?ysclid=lnis28yzzl945263948.</mixed-citation></citation-alternatives></ref><ref id="cit2"><label>2</label><citation-alternatives><mixed-citation xml:lang="ru">Tournigand C, André T, Achille E, Lledo G, Flesh M, Mery-Mignar D et al. FOLFIRI Followed by FOLFOX6 or the Reverse Sequence in Advanced Colorectal Cancer: A Randomized GERCOR Study. J Clin Oncol. 2004;22(2):229–237. https://doi.org/10.1200/JCO.2004.05.113.</mixed-citation><mixed-citation xml:lang="en">Tournigand C, André T, Achille E, Lledo G, Flesh M, Mery-Mignar D et al. FOLFIRI Followed by FOLFOX6 or the Reverse Sequence in Advanced Colorectal Cancer: A Randomized GERCOR Study. J Clin Oncol. 2004;22(2):229–237. https://doi.org/10.1200/JCO.2004.05.113.</mixed-citation></citation-alternatives></ref><ref id="cit3"><label>3</label><citation-alternatives><mixed-citation xml:lang="ru">De Vita F, Orditura M, Matano E, Bianco R, Carlomagno C, Infusino S et al. A phase II study of biweekly oxaliplatin plus infusional 5-fluorouracil and folinic acid (FOLFOX-4) as first-line treatment of advanced gastric cancer patients. Br J Cancer. 2005;92(9):1644–1649. https://doi.org/10.1038/sj.bjc.6602573.</mixed-citation><mixed-citation xml:lang="en">De Vita F, Orditura M, Matano E, Bianco R, Carlomagno C, Infusino S et al. A phase II study of biweekly oxaliplatin plus infusional 5-fluorouracil and folinic acid (FOLFOX-4) as first-line treatment of advanced gastric cancer patients. Br J Cancer. 2005;92(9):1644–1649. https://doi.org/10.1038/sj.bjc.6602573.</mixed-citation></citation-alternatives></ref><ref id="cit4"><label>4</label><citation-alternatives><mixed-citation xml:lang="ru">Onakpoya IJ, Heneghan CJ, Aronson JK. Worldwide withdrawal of medicinal products because of adverse drug reactions: a systematic review and analysis. Crit Rev Toxicol. 2016;46(6):477–489. https://doi.org/10.3109/10408444.2016.1149452.</mixed-citation><mixed-citation xml:lang="en">Onakpoya IJ, Heneghan CJ, Aronson JK. Worldwide withdrawal of medicinal products because of adverse drug reactions: a systematic review and analysis. Crit Rev Toxicol. 2016;46(6):477–489. https://doi.org/10.3109/10408444.2016.1149452.</mixed-citation></citation-alternatives></ref><ref id="cit5"><label>5</label><citation-alternatives><mixed-citation xml:lang="ru">Shahnam A, Ridha Z, Wiese MD, Kichenadasse G, Sorich MJ. Pharmacogenetic and ethnicity influence on oxaliplatin therapy for colorectal cancer: a meta-analysis. Pharmacogenomics. 2016;17(15):1725–1732. https://doi.org/10.2217/pgs-2016-0102.</mixed-citation><mixed-citation xml:lang="en">Shahnam A, Ridha Z, Wiese MD, Kichenadasse G, Sorich MJ. Pharmacogenetic and ethnicity influence on oxaliplatin therapy for colorectal cancer: a meta-analysis. Pharmacogenomics. 2016;17(15):1725–1732. https://doi.org/10.2217/pgs-2016-0102.</mixed-citation></citation-alternatives></ref><ref id="cit6"><label>6</label><citation-alternatives><mixed-citation xml:lang="ru">Meulendijks D, Henricks LM, Sonke GS, Deenen MJ, Froehlich TK, Amstutz U et al. Clinical relevance of DPYD variants c.1679T&gt;G, c.1236G&gt;A/HapB3, and c.1601G&gt;A as predictors of severe fluoropyrimidine-associated toxicity: a systematic review and meta-analysis of individual patient data. Lancet Oncol. 2015;16(16):1639–1650. https://doi.org/10.1016/S1470-2045(15)00286-7.</mixed-citation><mixed-citation xml:lang="en">Meulendijks D, Henricks LM, Sonke GS, Deenen MJ, Froehlich TK, Amstutz U et al. Clinical relevance of DPYD variants c.1679T&gt;G, c.1236G&gt;A/HapB3, and c.1601G&gt;A as predictors of severe fluoropyrimidine-associated toxicity: a systematic review and meta-analysis of individual patient data. Lancet Oncol. 2015;16(16):1639–1650. https://doi.org/10.1016/S1470-2045(15)00286-7.</mixed-citation></citation-alternatives></ref><ref id="cit7"><label>7</label><citation-alternatives><mixed-citation xml:lang="ru">Wigle TJ, Medwid S, Ross C, Schwarz UI, Kim RB. DPYD Exon 4 Deletion Associated with Fluoropyrimidine Toxicity and Importance of Copy Number Variation. Curr Oncol. 2023;30(1):663–672. https://doi.org/10.3390/curroncol30010051.</mixed-citation><mixed-citation xml:lang="en">Wigle TJ, Medwid S, Ross C, Schwarz UI, Kim RB. DPYD Exon 4 Deletion Associated with Fluoropyrimidine Toxicity and Importance of Copy Number Variation. Curr Oncol. 2023;30(1):663–672. https://doi.org/10.3390/curroncol30010051.</mixed-citation></citation-alternatives></ref><ref id="cit8"><label>8</label><citation-alternatives><mixed-citation xml:lang="ru">Khalil KA, Musallam HS, Hassan MA, Mahmoud IA. Triplet (FOLFOXIRI) Versus Doublet (FOLFOX or FOLFIRI) Regimen as First Line Treatment in Metastatic Colorectal Carcinoma, a Prospective Phase II, Randomized Controlled Trial. Asian Pac J Cancer Prev. 2022;23(10):3421–3429. https://doi.org/10.31557/APJCP.2022.23.10.3421.</mixed-citation><mixed-citation xml:lang="en">Khalil KA, Musallam HS, Hassan MA, Mahmoud IA. Triplet (FOLFOXIRI) Versus Doublet (FOLFOX or FOLFIRI) Regimen as First Line Treatment in Metastatic Colorectal Carcinoma, a Prospective Phase II, Randomized Controlled Trial. Asian Pac J Cancer Prev. 2022;23(10):3421–3429. https://doi.org/10.31557/APJCP.2022.23.10.3421.</mixed-citation></citation-alternatives></ref><ref id="cit9"><label>9</label><citation-alternatives><mixed-citation xml:lang="ru">Morel A, Boisdron-Celle M, Fey L, Soulie P, Craipeau MC, Traore S, Gamelin E. Clinical relevance of different dihydropyrimidine dehydrogenase gene single nucleotide polymorphisms on 5-fluorouracil tolerance. Mol Cancer Ther. 2006;5(11):2895–904. https://doi.org/10.1158/1535-7163.MCT-06-0327.</mixed-citation><mixed-citation xml:lang="en">Morel A, Boisdron-Celle M, Fey L, Soulie P, Craipeau MC, Traore S, Gamelin E. Clinical relevance of different dihydropyrimidine dehydrogenase gene single nucleotide polymorphisms on 5-fluorouracil tolerance. Mol Cancer Ther. 2006;5(11):2895–904. https://doi.org/10.1158/1535-7163.MCT-06-0327.</mixed-citation></citation-alternatives></ref><ref id="cit10"><label>10</label><citation-alternatives><mixed-citation xml:lang="ru">Sissung TM, Cordes L, Peer CJ, Gandhy S, Redman J, Strauss J, Figg WD. Case report: severe toxicity in an African-American patient receiving FOLFOX carrying uncommon allelic variants in DPYD. Pharmacogenomics. 2021;22(2):81–85. https://doi.org/10.2217/pgs-2020-0120.</mixed-citation><mixed-citation xml:lang="en">Sissung TM, Cordes L, Peer CJ, Gandhy S, Redman J, Strauss J, Figg WD. Case report: severe toxicity in an African-American patient receiving FOLFOX carrying uncommon allelic variants in DPYD. Pharmacogenomics. 2021;22(2):81–85. https://doi.org/10.2217/pgs-2020-0120.</mixed-citation></citation-alternatives></ref><ref id="cit11"><label>11</label><citation-alternatives><mixed-citation xml:lang="ru">Božina N, Bilić I, Ganoci L, Šimičević L, Pleština S, Lešnjaković L, Trkulja V. DPYD polymorphisms c.496A&gt;G, c.2194G&gt;A and c.85T&gt;C and risk of severe adverse drug reactions in patients treated with fluoropyrimidine-based protocols. Br J Clin Pharmacol. 2022;88(5):2190–2202. https://doi.org/10.1111/bcp.15144.</mixed-citation><mixed-citation xml:lang="en">Božina N, Bilić I, Ganoci L, Šimičević L, Pleština S, Lešnjaković L, Trkulja V. DPYD polymorphisms c.496A&gt;G, c.2194G&gt;A and c.85T&gt;C and risk of severe adverse drug reactions in patients treated with fluoropyrimidine-based protocols. Br J Clin Pharmacol. 2022;88(5):2190–2202. https://doi.org/10.1111/bcp.15144.</mixed-citation></citation-alternatives></ref><ref id="cit12"><label>12</label><citation-alternatives><mixed-citation xml:lang="ru">Medwid S, Wigle TJ, Kim RB. Fluoropyrimidine-associated toxicity and DPYD variants c.85T&gt;C, c.496A&gt;G, and c.1236G&gt;A: impact of haplotype. Cancer Chemother Pharmacol. 2023;91(1):97–102. https://doi.org/10.1007/s00280-022-04491-7.</mixed-citation><mixed-citation xml:lang="en">Medwid S, Wigle TJ, Kim RB. Fluoropyrimidine-associated toxicity and DPYD variants c.85T&gt;C, c.496A&gt;G, and c.1236G&gt;A: impact of haplotype. Cancer Chemother Pharmacol. 2023;91(1):97–102. https://doi.org/10.1007/s00280-022-04491-7.</mixed-citation></citation-alternatives></ref><ref id="cit13"><label>13</label><citation-alternatives><mixed-citation xml:lang="ru">Glewis S, Alexander M, Khabib MNH, Brennan A, Lazarakis S, Martin J et al. A systematic review and meta-analysis of toxicity and treatment outcomes with pharmacogenetic-guided dosing compared to standard of care BSA-based fluoropyrimidine dosing. Br J Cancer. 2022;127(1):126–136. https://doi.org/10.1038/s41416-022-01779-6.</mixed-citation><mixed-citation xml:lang="en">Glewis S, Alexander M, Khabib MNH, Brennan A, Lazarakis S, Martin J et al. A systematic review and meta-analysis of toxicity and treatment outcomes with pharmacogenetic-guided dosing compared to standard of care BSA-based fluoropyrimidine dosing. Br J Cancer. 2022;127(1):126–136. https://doi.org/10.1038/s41416-022-01779-6.</mixed-citation></citation-alternatives></ref><ref id="cit14"><label>14</label><citation-alternatives><mixed-citation xml:lang="ru">Федянин МЮ, Мамедли ЗЗ, Гордеев СС, Ачкасов СИ, Болотина ЛВ, Гладков ОА и др. Злокачественное новообразование ободочной кишки: клинические рекомендации. 2022. Режим доступа: https://cr.minzdrav.gov.ru/schema/396_3.</mixed-citation><mixed-citation xml:lang="en">Федянин МЮ, Мамедли ЗЗ, Гордеев СС, Ачкасов СИ, Болотина ЛВ, Гладков ОА и др. Злокачественное новообразование ободочной кишки: клинические рекомендации. 2022. Режим доступа: https://cr.minzdrav.gov.ru/schema/396_3.</mixed-citation></citation-alternatives></ref><ref id="cit15"><label>15</label><citation-alternatives><mixed-citation xml:lang="ru">Van Triest B, Peters GJ. Thymidylate synthase: a target for combination therapy and determinant of chemotherapeutic response in colorectal cancer. Oncology. 1999;57(3):179–194. https://doi.org/10.1159/000012030.</mixed-citation><mixed-citation xml:lang="en">Van Triest B, Peters GJ. Thymidylate synthase: a target for combination therapy and determinant of chemotherapeutic response in colorectal cancer. Oncology. 1999;57(3):179–194. https://doi.org/10.1159/000012030.</mixed-citation></citation-alternatives></ref><ref id="cit16"><label>16</label><citation-alternatives><mixed-citation xml:lang="ru">Kawakami K, Omura K, Kanehira E, Watanabe Y. Polymorphic tandem repeats in the thymidylate synthase gene is associated with its protein expression in human gastrointestinal cancers. Anticancer Res. 1999;19(4B):3249–3252. Available at: https://pubmed.ncbi.nlm.nih.gov/10652619.</mixed-citation><mixed-citation xml:lang="en">Kawakami K, Omura K, Kanehira E, Watanabe Y. Polymorphic tandem repeats in the thymidylate synthase gene is associated with its protein expression in human gastrointestinal cancers. Anticancer Res. 1999;19(4B):3249–3252. Available at: https://pubmed.ncbi.nlm.nih.gov/10652619.</mixed-citation></citation-alternatives></ref><ref id="cit17"><label>17</label><citation-alternatives><mixed-citation xml:lang="ru">Schwab M, Zanger UM, Marx C, Schaeffeler E, Klein K, Dippon J et al. Role of Genetic and Nongenetic Factors for Fluorouracil Treatment-Related Severe Toxicity: A Prospective Clinical Trial by the German 5-FU Toxicity Study Group. J Clin Oncol. 2008;26(13):2131–2138. https://doi.org/10.1200/JCO.2006.10.4182.</mixed-citation><mixed-citation xml:lang="en">Schwab M, Zanger UM, Marx C, Schaeffeler E, Klein K, Dippon J et al. Role of Genetic and Nongenetic Factors for Fluorouracil Treatment-Related Severe Toxicity: A Prospective Clinical Trial by the German 5-FU Toxicity Study Group. J Clin Oncol. 2008;26(13):2131–2138. https://doi.org/10.1200/JCO.2006.10.4182.</mixed-citation></citation-alternatives></ref><ref id="cit18"><label>18</label><citation-alternatives><mixed-citation xml:lang="ru">Sohn KJ, Croxford R, Yates Z, Lucock M, Kim YI. Effect of the Methylenetetrahydrofolate Reductase C677T Polymorphism on Chemosensitivity of Colon and Breast Cancer Cells to 5-Fluorouracil and Methotrexate. J Natl Cancer Inst. 2004;96(2):134–144. https://doi.org/10.1093/jnci/djh015.</mixed-citation><mixed-citation xml:lang="en">Sohn KJ, Croxford R, Yates Z, Lucock M, Kim YI. Effect of the Methylenetetrahydrofolate Reductase C677T Polymorphism on Chemosensitivity of Colon and Breast Cancer Cells to 5-Fluorouracil and Methotrexate. J Natl Cancer Inst. 2004;96(2):134–144. https://doi.org/10.1093/jnci/djh015.</mixed-citation></citation-alternatives></ref><ref id="cit19"><label>19</label><citation-alternatives><mixed-citation xml:lang="ru">Ramos-Esquivel A, Chinchilla R, Valle M. Association of C677T and A1298C MTHFR Polymorphisms and Fluoropyrimidine-induced Toxicity in Mestizo Patients With Metastatic Colorectal Cancer. Anticancer Res. 2020;40(8):4263–4270. https://doi.org/10.21873/anticanres.14428.</mixed-citation><mixed-citation xml:lang="en">Ramos-Esquivel A, Chinchilla R, Valle M. Association of C677T and A1298C MTHFR Polymorphisms and Fluoropyrimidine-induced Toxicity in Mestizo Patients With Metastatic Colorectal Cancer. Anticancer Res. 2020;40(8):4263–4270. https://doi.org/10.21873/anticanres.14428.</mixed-citation></citation-alternatives></ref><ref id="cit20"><label>20</label><citation-alternatives><mixed-citation xml:lang="ru">Xie C, Zhao J, Hua W, Tan P, Chen Y, Rui J et al. Effect of XPC polymorphisms on the response to platinum-based chemotherapy: a meta-analysis. Onco Targets Ther. 2019;12:3839–3848. https://doi.org/10.2147/OTT.S202617.</mixed-citation><mixed-citation xml:lang="en">Xie C, Zhao J, Hua W, Tan P, Chen Y, Rui J et al. Effect of XPC polymorphisms on the response to platinum-based chemotherapy: a meta-analysis. Onco Targets Ther. 2019;12:3839–3848. https://doi.org/10.2147/OTT.S202617.</mixed-citation></citation-alternatives></ref><ref id="cit21"><label>21</label><citation-alternatives><mixed-citation xml:lang="ru">Ban N, Takahashi Y, Takayama T, Kura T, Katahira T, Sakamaki S et al. Transfection of glutathione S-transferase (GST)-pi antisense complementary DNA increases the sensitivity of a colon cancer cell line to adriamycin, cisplatin, melphalan, and etoposide. Cancer Res. 1996;56(15):3577–3582. Available at: https://pubmed.ncbi.nlm.nih.gov/8758929.</mixed-citation><mixed-citation xml:lang="en">Ban N, Takahashi Y, Takayama T, Kura T, Katahira T, Sakamaki S et al. Transfection of glutathione S-transferase (GST)-pi antisense complementary DNA increases the sensitivity of a colon cancer cell line to adriamycin, cisplatin, melphalan, and etoposide. Cancer Res. 1996;56(15):3577–3582. Available at: https://pubmed.ncbi.nlm.nih.gov/8758929.</mixed-citation></citation-alternatives></ref><ref id="cit22"><label>22</label><citation-alternatives><mixed-citation xml:lang="ru">Puerta-García E, Urbano-Pérez D, Carrasco-Campos MI, Pérez-Ramírez C, Segura-Pérez A, Calleja-Hernández et al. Effect of DPYD, MTHFR, ABCB1, XRCC1, ERCC1 and GSTP1 on chemotherapy related toxicity in colorectal carcinoma. Surg Oncol. 2020;35:388–398. https://doi.org/10.1016/j.suronc.2020.09.016.</mixed-citation><mixed-citation xml:lang="en">Puerta-García E, Urbano-Pérez D, Carrasco-Campos MI, Pérez-Ramírez C, Segura-Pérez A, Calleja-Hernández et al. Effect of DPYD, MTHFR, ABCB1, XRCC1, ERCC1 and GSTP1 on chemotherapy related toxicity in colorectal carcinoma. Surg Oncol. 2020;35:388–398. https://doi.org/10.1016/j.suronc.2020.09.016.</mixed-citation></citation-alternatives></ref><ref id="cit23"><label>23</label><citation-alternatives><mixed-citation xml:lang="ru">Huang MY, Huang ML, Chen MJ, Lu CY, Chen CF, Tsai PC et al. Multiple genetic polymorphisms in the prediction of clinical outcome of metastatic colorectal cancer patients treated with first-line FOLFOX-4 chemotherapy. Pharmacogenet Genomics. 2011;21(1):18–25. https://doi.org/10.1097/FPC.0b013e3283415124.</mixed-citation><mixed-citation xml:lang="en">Huang MY, Huang ML, Chen MJ, Lu CY, Chen CF, Tsai PC et al. Multiple genetic polymorphisms in the prediction of clinical outcome of metastatic colorectal cancer patients treated with first-line FOLFOX-4 chemotherapy. Pharmacogenet Genomics. 2011;21(1):18–25. https://doi.org/10.1097/FPC.0b013e3283415124.</mixed-citation></citation-alternatives></ref><ref id="cit24"><label>24</label><citation-alternatives><mixed-citation xml:lang="ru">Keam B, Im SA, Han SW, Ham HS, Kim MA, Oh DY et al. Modified FOLFOX-6 chemotherapy in advanced gastric cancer: Results of phase II study and comprehensive analysis of polymorphisms as a predictive and prognostic marker. BMC Cancer. 2008;8:148. https://doi.org/10.1186/1471-2407-8-148.</mixed-citation><mixed-citation xml:lang="en">Keam B, Im SA, Han SW, Ham HS, Kim MA, Oh DY et al. Modified FOLFOX-6 chemotherapy in advanced gastric cancer: Results of phase II study and comprehensive analysis of polymorphisms as a predictive and prognostic marker. BMC Cancer. 2008;8:148. https://doi.org/10.1186/1471-2407-8-148.</mixed-citation></citation-alternatives></ref><ref id="cit25"><label>25</label><citation-alternatives><mixed-citation xml:lang="ru">Badary DM, Elkabsh MM, Mady HH, Gabr A, Kroosh SS. Prognostic and Predictive Role of Excision Repair Cross-complementation Group 1 and Thymidylate Synthase in Colorectal Carcinoma Patients Received FOLFOX Chemotherapy: An Immunohistochemical Study. Appl Immunohistochem Mol Morphol. 2020;28(10):741–747. https://doi.org/10.1097/PAI.0000000000000841.</mixed-citation><mixed-citation xml:lang="en">Badary DM, Elkabsh MM, Mady HH, Gabr A, Kroosh SS. Prognostic and Predictive Role of Excision Repair Cross-complementation Group 1 and Thymidylate Synthase in Colorectal Carcinoma Patients Received FOLFOX Chemotherapy: An Immunohistochemical Study. Appl Immunohistochem Mol Morphol. 2020;28(10):741–747. https://doi.org/10.1097/PAI.0000000000000841.</mixed-citation></citation-alternatives></ref></ref-list><fn-group><fn fn-type="conflict"><p>The authors declare that there are no conflicts of interest present.</p></fn></fn-group></back></article>
