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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="research-article" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Kazan medical journal</journal-id><journal-title-group><journal-title xml:lang="en">Kazan medical journal</journal-title><trans-title-group xml:lang="ru"><trans-title>Казанский медицинский журнал</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0368-4814</issn><issn publication-format="electronic">2587-9359</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">1775</article-id><article-id pub-id-type="doi">10.17816/KMJ1775</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Experimental medicine</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Экспериментальная медицина</subject></subj-group><subj-group subj-group-type="article-type"><subject>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Increased activity of poly(ADP-ribose)-polymerase in PML-depleted cells - novel perspectives for cancer therapy</article-title><trans-title-group xml:lang="ru"><trans-title>Повышение активности поли(АДф-рибоза)-полимераз в условиях нокдауна белка PML - новые перспективы терапии злокачественных новообразований</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Boichuk</surname><given-names>S V</given-names></name><name xml:lang="ru"><surname>Бойчук</surname><given-names>Сергей Васильевич</given-names></name></name-alternatives><email>boichuksergei@mail.ru</email><xref ref-type="aff" rid="aff1"/><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ramazanov</surname><given-names>B R</given-names></name><name xml:lang="ru"><surname>Рамазанов</surname><given-names>Булат Рашитович</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Mustafin</surname><given-names>I G</given-names></name><name xml:lang="ru"><surname>Мустафин</surname><given-names>Ильшат Ганиевич</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>O</surname><given-names>Gjoerup</given-names></name><name xml:lang="ru"><surname>Оле</surname><given-names>Джоерап</given-names></name></name-alternatives><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Kazan State Medical University, Kazan, Russia</institution></aff><aff><institution xml:lang="ru">Казанский государственный медицинский университет</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">University of Pittsburgh Cancer Institute, Pittsburgh, USA</institution></aff><aff><institution xml:lang="ru">Раковый центр университета г. Питтсбурга, США</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2013-02-15" publication-format="electronic"><day>15</day><month>02</month><year>2013</year></pub-date><volume>94</volume><issue>1</issue><issue-title xml:lang="en">VOL 94, NO1 (2013)</issue-title><issue-title xml:lang="ru">ТОМ 94, №1 (2013)</issue-title><fpage>75</fpage><lpage>79</lpage><history><date date-type="received" iso-8601-date="2016-03-28"><day>28</day><month>03</month><year>2016</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2013, Boichuk S.V., Ramazanov B.R., Mustafin I.G., O G.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2013, Бойчук С.В., Рамазанов Б.Р., Мустафин И.Г., Оле Д.</copyright-statement><copyright-year>2013</copyright-year><copyright-holder xml:lang="en">Boichuk S.V., Ramazanov B.R., Mustafin I.G., O G.</copyright-holder><copyright-holder xml:lang="ru">Бойчук С.В., Рамазанов Б.Р., Мустафин И.Г., Оле Д.</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/">http://creativecommons.org/licenses/by-nc-sa/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://kazanmedjournal.ru/kazanmedj/article/view/1775">https://kazanmedjournal.ru/kazanmedj/article/view/1775</self-uri><abstract xml:lang="en"><p>Aim. To investigate the relationship between PML expression and poly(ADP-ribose)-polymerase (PARP) activity in physiological conditions and at genotoxic stress induced by chemotherapy and ionizing radiation. Methods. The study was conducted on BJ fibroblasts cultured in DMEM/199 medium supplemented with fetal bovine serum, L-glutamine and antibiotics. PML down-regulation was achieved by short interfering ribonucleic acid transfection. To induce deoxyribonucleic acid (DNA) damage in BJ fibroblasts, doxorubicin and hydroxyurea or ionizing radiation were used. PARP activity, formation of DNA double-strand breaks and DNA damage response were examined by Western blotting and immunofluorescence microscopy. Results. PML knockdown was accomplished with an increased PARP activity, confirmed by an increased expression of poly-ADP-ribose (PAR) polymers. At PML knockdown ant DNA damage caused by chemotherapy and ionizing radiation, there is a significant increase in PAR polymers expression as well as increase in the number of cells containing PAR foci. Conclusion. Increased activity of poly(ADP-ribose)-polymerase at PML knockdown and DNA damaging conditions indicates the compensatory response due to insufficiency of the homologous recombination mechanisms. The phenomenon found widens the spectrum of malignancies that might be potentially sensitive to the therapy with poly(ADP-ribose)-polymerase inhibitors.</p></abstract><trans-abstract xml:lang="ru"><p>Цель. Изучение взаимосвязи между экспрессией белка PML и активностью поли(АДФ-рибоза)-полимераз в физиологических условиях, а также в условиях генотоксического стресса, вызываемого химиопрепаратами и ионизирующим излучением. Методы. Исследование проводили на фибробластах человека линии BJ, культивированных в среде DMEM/199 с добавлением эмбриональной телячьей сыворотки, глутамина и антибиотиков. Снижения уровня экспрессии белка PML достигали в результате трансфекции коротких интерферирующих рибонуклеиновых кислот. Для индукции повреждений дезоксирибонуклеиновой кислоты (ДНК) использовали химиопрепараты (доксорубицин и гидроксимочевину) и ионизирующее излучение. Образование двунитевых разрывов ДНК, их репарацию, а также активность поли(АДФ-рибоза)-полимеразы оценивали методами иммуноблоттинга и иммунофлюоресценции. Результаты. Нокдаун белка PML в фибробластах человека сопровождался повышением активности поли(АДФ-рибоза)-полимеразы, о чём свидетельствовало увеличение уровня экспрессии полимеров. В условиях нокдауна белка PML и повреждений ДНК, вызываемых химиопрепаратами и ионизирующим излучением, происходит значительное увеличение уровня экспрессии полимеров, а также их фокального распределения. Вывод. Увеличение активности поли(АДФ-рибоза)-полимеразы в условиях нокдауна PML и воздействия факторов, повреждающих ДНК, свидетельствует о развитии компенсаторной реакции в условиях несостоятельности процессов гомологичной рекомбинации; обнаруженный феномен позволяет расширить спектр злокачественных новообразований, потенциально восприимчивых к терапии ингибиторами поли(АДФ-рибоза)-полимеразы.</p></trans-abstract><kwd-group xml:lang="en"><kwd>PML</kwd><kwd>mutagenesis</kwd><kwd>PML</kwd><kwd>poly(ADP-ribose)-polymerase</kwd><kwd>DNA damage response</kwd><kwd>anticancer agents</kwd><kwd>radiotherapy</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>мутагенез</kwd><kwd>поли(АДФ-рибоза)-полимераза</kwd><kwd>репарация повреждений ДНК</kwd><kwd>противоопухолевые средства</kwd><kwd>радиотерапия</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Antoniou A., Pharoah P.D., Narod S. et al. 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