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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">Epidemiology and Infectious Diseases</journal-id><journal-title-group><journal-title xml:lang="en">Epidemiology and Infectious Diseases</journal-title><trans-title-group xml:lang="ru"><trans-title>Эпидемиология и инфекционные болезни</trans-title></trans-title-group></journal-title-group><issn publication-format="print">3034-2007</issn><issn publication-format="electronic">3034-2015</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">42629</article-id><article-id pub-id-type="doi">10.17816/EID42629</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>Статьи</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">THE INVESTIGATION OF DNA DAMAGE IN LYMPHOCYTES BY COMET ASSAY IN CHRONIC VIRAL HEPATITIS B PATIENTS</article-title><trans-title-group xml:lang="ru"><trans-title>ИССЛЕДОВАНИЕ ПОВРЕЖДЕНИЙ ДНК ЛИМФОЦИТОВ У БОЛЬНЫХ ХРОНИЧЕСКИМ ВИРУСНЫМ ГЕПАТИТОМ В МЕТОДОМ ДНК-КОМЕТ</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Mikhailov</surname><given-names>A. O</given-names></name><name xml:lang="ru"><surname>Михайлов</surname><given-names>Александр Олегович</given-names></name></name-alternatives><email>mao1991@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Popov</surname><given-names>A. F</given-names></name><name xml:lang="ru"><surname>Попов</surname><given-names>Александр Федорович</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Ivanova</surname><given-names>N. S</given-names></name><name xml:lang="ru"><surname>Иванова</surname><given-names>Надежда Семеновна</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Simakova</surname><given-names>A. I</given-names></name><name xml:lang="ru"><surname>Симакова</surname><given-names>Анна Ивановна</given-names></name></name-alternatives><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Pacific State Medical University</institution></aff><aff><institution xml:lang="ru">ФГБОУ ВО «Тихоокеанский государственный медицинский университет» Минздрава России</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2017-04-15" publication-format="electronic"><day>15</day><month>04</month><year>2017</year></pub-date><volume>22</volume><issue>2</issue><issue-title xml:lang="en">VOL 22, NO2 (2017)</issue-title><issue-title xml:lang="ru">ТОМ 22, №2 (2017)</issue-title><fpage>64</fpage><lpage>68</lpage><history><date date-type="received" iso-8601-date="2020-08-21"><day>21</day><month>08</month><year>2020</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2017, Eco-vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2017, ООО "Эко-вектор"</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="en">Eco-vector</copyright-holder><copyright-holder xml:lang="ru">ООО "Эко-вектор"</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/></permissions><self-uri xlink:href="https://rjeid.com/1560-9529/article/view/42629">https://rjeid.com/1560-9529/article/view/42629</self-uri><abstract xml:lang="en"><p>The investigation of the degree of the lymphocyte DNA damage in chronic viral hepatitis B (HBV) patients is of interest for several reasons. Firstly, it is possible to judge indirectly about the depth of the pathological process at the level of the whole organism, with bearing in mind features of the pathogenic replication of hepatitis B virus. Secondly, it is possible to give an estimation of the degree of genotoxic impact of the virus on blood cells that plays an essential role in the shaping of the immune response of the body. The study was executed on 50 blood samples from HBV patients, divided in 5 groups on the fibrosis grade according to METAVIR score: F0 (n = 10), F1 (N = 10), F2 (N = 10), F3 (n = 10), F4 (n = 10). The control group was consisted of 43 volunteers matched by the age and gender without concomitant diseases. From blood samples taken at the time of the admission to the hospital lymphocytes were isolated by density gradient on Ficoll-urografin. The degree of DNA damage in lymphocytes was determined by virtue of alkaline version of the DNA comet assay. There was noted the direct relationship between an increase in % DNA in the tail of comets and the grade of liver fibrosis. So in the control group, % DNA in the tail accounted for 3.75 ± 1.44. In the F0 group % of DNA in the tail was 5.07 ± 1.25, F1 - 6.79 ± 1.79, F2 - 7.65 ± 1.62, F3 - 8.05 ± 1.18, F4 - 9.84 ± 3.09. It is noteworthy that in groups F2, F3, F4 differences were statistically significant in comparison with the control group. Also there was noted the presence of apoptotic cells in F3, F4 groups: 1 and 0.88%, respectively. Identified changes are both important in the description of to molecular patterns of the pathogenesis of chronic hepatitis B associated with damage, and also can serve as an indirect indication of the stage of liver fibrosis.</p></abstract><trans-abstract xml:lang="ru"><p>Исследование степени повреждения ДНК лимфоцитов при хроническом вирусном гепатите В (ХВГВ) представляет интерес по ряду причин. Во-первых, можно косвенно судить о глубине патологического процесса на уровне всего организма, учитывая патогенетические особенности репликации вируса гепатита. Во-вторых, дать оценку степени генотоксического действия вируса на клетки крови, что играет существенную роль при формировании иммунного ответа организма. Исследование проведено на 50 образцах крови больных ХВГВ, которые в зависимости от степени выраженности фиброза по шкале METAVIR поделены на 5 групп (в каждой группе n = 10): F0, F1, F2, F3, F4. Контрольную группу составили 43 добровольца, сопоставимых по полу и возрасту, без сопутствующих заболеваний. Из образцов крови, взятых во время поступления в стационар, выделяли лимфоциты на градиенте плотности фиколл-урографин и исследовали степень повреждения ДНК в клетках щелочным вариантом метода ДНК-комет. Отмечалась прямая зависимость между % ДНК в хвосте комет и степенью фиброза печени. Так, в контрольной группе доля ДНК в хвосте кометы составила 3,75±1,44%; в группе F0 - 5,07±1,25%; F1 - 6,79±1,79%, F2 - 7,65±1,62%, F3 - 8,05±1,18%, F4 - 9,84±3,09%. Статистически значимые различия по сравнению с контрольной группой наблюдались в группах с выраженностью фиброза - F2, F3, F4. Также отмечалось наличие апоптотических клеток в группах F3 и F4 - 1 и 0,88% соответственно. Выявленные изменения важны в описании ассоциированных с повреждением молекулярных паттернов патогенеза хронического вирусного гепатита В, а также могут служить косвенным признаком стадии фиброза печени.</p></trans-abstract><kwd-group xml:lang="en"><kwd>DNA comet assay</kwd><kwd>hepatitis B</kwd><kwd>fibrosis</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>метод ДНК-комет</kwd><kwd>гепатит В</kwd><kwd>фиброз</kwd></kwd-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Balogh J., Victor D., Asham E.H., Burroughs S.G. Hepatocellular carcinoma: a review. J. 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