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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">Oncohematology</journal-id><journal-title-group><journal-title xml:lang="en">Oncohematology</journal-title><trans-title-group xml:lang="ru"><trans-title>Онкогематология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1818-8346</issn><issn publication-format="electronic">2413-4023</issn><publisher><publisher-name xml:lang="en">Publishing House ABV Press</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">466</article-id><article-id pub-id-type="doi">10.17650/1818-8346-2021-16-1-73-82</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>SUPPORTIVE THERAPY ASPECTS</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>АСПЕКТЫ ПОДДЕРЖИВАЮЩЕЙ ТЕРАПИИ</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">Pharmacokinetics of low molecular weight heparins in thrombosis, complicate the treatment of children with cancer</article-title><trans-title-group xml:lang="ru"><trans-title>Фармакокинетика низкомолекулярных гепаринов при тромбозах, осложнивших лечение детей с онкологическими заболеваниями</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-2738-429X</contrib-id><name-alternatives><name xml:lang="en"><surname>Dmitriev</surname><given-names>V. V.</given-names></name><name xml:lang="ru"><surname>Дмитриев</surname><given-names>В. В.</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>Vyacheslav Vasil'evich Dmitriev.</p><p>43 Frunzenskaya St., Borovlyany, Minsk region 223053.</p></bio><bio xml:lang="ru"><p>Дмитриев Вячеслав Васильевич.</p><p>223053 Минский район, д. Боровляны, ул. Фрунзенская, 43.</p></bio><email>dmitrievhaematol@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8304-1005</contrib-id><name-alternatives><name xml:lang="en"><surname>Lipay</surname><given-names>N. V.</given-names></name><name xml:lang="ru"><surname>Липай</surname><given-names>Н. В.</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>43 Frunzenskaya St., Borovlyany, Minsk region 223053.</p></bio><bio xml:lang="ru"><p>223053 Минский район, д. Боровляны, ул. Фрунзенская, 43.</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Migal</surname><given-names>N. V.</given-names></name><name xml:lang="ru"><surname>Мигаль</surname><given-names>Н. В.</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>43 Frunzenskaya St., Borovlyany, Minsk region 223053.</p></bio><bio xml:lang="ru"><p>223053 Минский район, д. Боровляны, ул. Фрунзенская, 43.</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Begun</surname><given-names>I. V.</given-names></name><name xml:lang="ru"><surname>Бегун</surname><given-names>И. В.</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>43 Frunzenskaya St., Borovlyany, Minsk region 223053.</p></bio><bio xml:lang="ru"><p>223053 Минский район, д. Боровляны, ул. Фрунзенская, 43.</p></bio><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0233-7718</contrib-id><name-alternatives><name xml:lang="en"><surname>Dmitriev</surname><given-names>E. V.</given-names></name><name xml:lang="ru"><surname>Дмитриев</surname><given-names>Е. В.</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>43 Frunzenskaya St., Borovlyany, Minsk region 223053.</p></bio><bio xml:lang="ru"><p>223053 Минский район, д. Боровляны, ул. Фрунзенская, 43.</p></bio><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Belarusian Research Center for Pediatric Oncology, Hematology and Immunology</institution></aff><aff><institution xml:lang="ru">Республиканский научно-практический центр детской онкологии, гематологии и иммунологии Минздрава Республики Беларусь</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2021-04-14" publication-format="electronic"><day>14</day><month>04</month><year>2021</year></pub-date><volume>16</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>73</fpage><lpage>82</lpage><history><date date-type="received" iso-8601-date="2021-04-14"><day>14</day><month>04</month><year>2021</year></date><date date-type="accepted" iso-8601-date="2021-04-14"><day>14</day><month>04</month><year>2021</year></date></history><permissions><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://oncohematology.abvpress.ru/ongm/article/view/466">https://oncohematology.abvpress.ru/ongm/article/view/466</self-uri><abstract xml:lang="en"><p><bold>Objective</bold>: to evaluate the pharmacokinetics of nadroparin and dalteparin in thrombosis complicating the treatment of children with malignant neoplasms.</p><p><bold>Materials and methods</bold>. The results of 52 pharmacokinetic studies performed in 34 patients with malignant neoplasms, whose treatment was complicated by venous thrombosis, were analyzed. The age of the patients is from 7 to 18 years, he median is 14.5 years. Depending on the value of daily dose and type of heparin administered, the results of pharmacokinetic studies were divided into 6 groups. Dalteparin sodium: during period of chemotherapy induced thrombocytopenia, subcutaneous injection at a dose of 51.0 (40.0-72.0) anti Xa IU/kg every 12 hours - 6 studies; subcutaneous injection every 12 hours at a dose of 100.5 (91.0-141.0) anti Xa IU/kg - 18 observations; long-term continuous administration at a constant rate at a daily dose of 201.0 (180.0-265.0) anti Xa IU/kg - 6 pharmacokinetic observations. Nadroparin calcium: 62.0 (53.0-71.0) anti Xa IU/kg every 12 hours - 6 studies; 93.5 (80.0-117.0) anti Xa IU/kg every 12 hours - 10 observations; subcutaneous injection at a dose of 203.0 (170.0-236.0) anti Xa IU/kg once a day - 6 pharmacokinetic observations.</p><p><bold>Results</bold>. At steady-state, the area under the pharmacokinetic curve (AUC) of dalteparin and nadroparin, regardless of the mode of administration, depended on the maximum specific activity and half-life. No relationship was found for dalteparin between AUC and endogenous creatinine clearance. In contrast to dalteparin, the AUC after administration of na-droparin was closely related to endogenous creatinine clearance. The increase in chronometric indices indirectly reflected the presence of an anticoagulant in the blood, but did not allow an objective assessment of therapeutic effect achievement, recorded by the degree of thrombin generation inhibition.</p><p><bold>Conclusion</bold>. There were no significant advantages of nadroparin compared with dalteparin when using in comparable doses in the case of venous thrombosis, complicated the treatment of children with malignant neoplasms. Subcutaneous administration of 50 % nadroparin calcium daily dose with 12 hours interval is preferred over a single administration of 100 % daily dose every 24 hours. It is mandatory to monitor the administration of low molecular weight heparins in children with oncological diseases in order to make a decision on the adequacy of anticoagulant dose to the therapeutic range.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Цель исследования</bold> - оценить фармакокинетику надропарина и далтепарина при тромбозах, осложнивших лечение детей со злокачественными новообразованиями.</p><p><bold>Материалы и методы</bold>. Проанализированы результаты 52 фармакокинетических исследований с участием 34 пациентов с онкологическими заболеваниями, лечение которых было осложнено венозным тромбозом. Медиана возраста пациентов - 14,5 (7-18) года. В зависимости от величины суточной дозы и вида вводимого гепарина результаты фармакокинетических исследований были разделены на 6 групп. Далтепарин натрия: на фоне химиоиндуцированной тромбоцитопении подкожное введение далтепарина в дозе 51,0 (40,0-72,0) анти-Ха МЕ/кг каждые 12 ч - 6 наблюдений; подкожное введение каждые 12 ч в дозе 100,5 (91,0-141,0) анти-Ха МЕ/кг - 18 наблюдений; длительное непрерывное введение с постоянной скоростью в суточной дозе 201,0 (180,0-265,0) анти-Ха МЕ/кг - 6 наблюдений. Надропарин кальция: 62,0 (53,0-71,0) анти-Ха МЕ/кг каждые 12 ч - 6 наблюдений; 93,5 (80,0-117,0) анти-Ха МЕ/кг через 12 ч - 10 наблюдений; подкожное введение в дозе 203,0 (170,0-236,0) анти-Ха МЕ/кг 1 раз в сутки - 6 наблюдений.</p><p><bold>Результаты</bold>. В стационарном состоянии площадь под фармакокинетической кривой (AUC) далтепарина и надропарина, независимо от режима введения, обусловлена максимальной специфической активностью и периодом полувыведения. Для далтепарина не выявлено взаимосвязи между AUC и величиной клиренса эндогенного креатинина. В противоположность далтепарину величина AUC после введения надропарина была тесно связана с клиренсом эндогенного креатинина. Увеличение хронометрических показателей косвенно отражало присутствие антикоагулянта в крови, но не позволяло объективно оценить достижение терапевтического эффекта, регистрируемого по степени торможения генерации тромбина.</p><p><bold>Заключение</bold>. Не выявлено существенных преимуществ надропарина перед далтепарином при использовании антикоагулянтов в сопоставимых дозах в случае венозных тромбозов, осложнивших лечение детей со злокачественными новообразованиями. Подкожное введение 50 % суточной дозы надропарина с интервалом 12 ч предпочтительнее, чем однократное введение 100 % суточной дозы каждые 24 ч. Обязателен контроль за введением низкомолекулярных гепаринов у детей с онкологическими заболеваниями для принятия решения об адекватности выбранной дозы антикоагулянта.</p></trans-abstract><kwd-group xml:lang="en"><kwd>venous thrombosis</kwd><kwd>malignant neoplasms</kwd><kwd>children</kwd><kwd>adolescents</kwd><kwd>anticoagulant therapy</kwd><kwd>low molecular weight heparin</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>венозный тромбоз</kwd><kwd>злокачественные новообразования</kwd><kwd>дети</kwd><kwd>подростки</kwd><kwd>антикоагулянтная терапия</kwd><kwd>низкомолекулярный гепарин</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Monagle P., Cuello C.A., Augustine C. et al. 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