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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">dan</journal-id><journal-title-group><journal-title xml:lang="ru">Доклады Национальной академии наук Беларуси</journal-title><trans-title-group xml:lang="en"><trans-title>Doklady of the National Academy of Sciences of Belarus</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1561-8323</issn><issn pub-type="epub">2524-2431</issn><publisher><publisher-name>The Republican Unitary Enterprise Publishing House "Belaruskaya Navuka"</publisher-name></publisher></journal-meta><article-meta><article-id custom-type="elpub" pub-id-type="custom">dan-441</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>ХИМИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>CHEMISTRY</subject></subj-group></article-categories><title-group><article-title>ФОСФОЛИПАЗА А2 IB – НОВЫЙ ИНДИКАТОР ОЦЕНКИ ПРО-АНТИОКСИДАНТНОГО СТАТУСА ОРГАНИЗМА</article-title><trans-title-group xml:lang="en"><trans-title>PHOSPHOLIPASE A2 IB – A NEW INDICATOR FOR ESTIMATION OF THE PRO-ANTIOXIDANT STATUS OF THE ORGANISM</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Литвинко</surname><given-names>Н. М.</given-names></name><name name-style="western" xml:lang="en"><surname>Litvinko</surname><given-names>N. M.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р хим. наук, доцент, заведующая лабораторией</p></bio><bio xml:lang="en"><p>D. Sc. (Chemistry), Assistant Professor, Head of the Laboratory</p></bio><email xlink:type="simple">al_h@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Скоростецкая</surname><given-names>Л. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Skorostetskaya</surname><given-names>L. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>науч. сотрудник</p></bio><bio xml:lang="en"><p>Researcher</p></bio><email xlink:type="simple">lydiask@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Герловский</surname><given-names>Д. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Gerlovsky</surname><given-names>D. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>канд. хим. наук, науч. сотрудник</p></bio><bio xml:lang="en"><p>Ph. D. (Chemistry), Researcher</p></bio><email xlink:type="simple">denis2904-83@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт биоорганической химии Национальной академии наук Беларуси</institution></aff><aff xml:lang="en"><institution>Institute of Bioorganic Chemistry of the National Academy of Sciences of Belarus</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2017</year></pub-date><pub-date pub-type="epub"><day>05</day><month>10</month><year>2017</year></pub-date><volume>61</volume><issue>4</issue><fpage>60</fpage><lpage>68</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Литвинко Н.М., Скоростецкая Л.А., Герловский Д.О., 2017</copyright-statement><copyright-year>2017</copyright-year><copyright-holder xml:lang="ru">Литвинко Н.М., Скоростецкая Л.А., Герловский Д.О.</copyright-holder><copyright-holder xml:lang="en">Litvinko N.M., Skorostetskaya L.A., Gerlovsky D.O.</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://doklady.belnauka.by/jour/article/view/441">https://doklady.belnauka.by/jour/article/view/441</self-uri><abstract><p>Изучена эффективность свободнорадикального окисления в фосфолипидных мембранах под воздействием УФ-облучения (λ = 180–400 нм) с помощью фосфолипазы А2 (ФЛA2 IB) как маркера перекисного окисления липидов. Смешанные мицеллы фосфатидилхолина и дезоксихолата натрия были использованы в качестве модели фосфолипидных мембран. Активность ФЛA2 определяли по спектральным изменениям гемоглобина при взаимодействии с жирными кислотами как продуктами фосфолиполиза. Уровень перекисного окисления липидов в то же время оценивали по накоплению малонового диальдегида как хорошо известного продукта облучения фосфолипидов. Получена прямо пропорциональная зависимость активности ФЛA2 от времени УФ-облучения фосфолипидов. Это показывает, что уровень активности ФЛA2 хорошо коррелирует с уровнем перекисного окисления липидов и может охарактеризовать антиоксидантный потенциал крови при использовании известного антиоксиданта Тролокса в качестве стандарта.</p><sec><title> </title><p> </p></sec><sec><title> </title><p> </p></sec></abstract><trans-abstract xml:lang="en"><p>The efﬁciency of free radical oxidation of phospholipid membranes under exposure to UV radiation (λ = 180– 400 nm) by the phospholipase A2 PLA2 IB as a marker of lipid peroxidation was studied. Mixed micelles of phosphatidylcholine and sodium deoxycholate were employed as the model of phospholipid membranes. The PLA2 activity was determined by spectral changes in hemoglobin upon the interaction with fatty acids, resulting from a phospholipolysis product. At the same time, the level of lipid peroxidation was estimated by accumulation of malondialdehyde as a well-known product of irradiation of phospholipids. The directly proportional dependence of the PLA2 activity on the UV irradiation time of phospholipids is obtained. It is shown that the level of the PLA2 activity correlates well with the lipid peroxidation level, pointing to the antioxidant capacity of blood in comparison with the well-known antioxidant Trolox as standard.</p><sec><title> </title><p> </p></sec><sec><title> </title><p> </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>фосфолиполиз</kwd><kwd>фосфолипаза A2</kwd><kwd>жирные кислоты</kwd><kwd>гемоглобин</kwd><kwd>общая антиоксидантная активность</kwd><kwd>антиоксидантный потенциал</kwd></kwd-group><kwd-group xml:lang="en"><kwd>phospholipolysis</kwd><kwd>phospholipase A2</kwd><kwd>fatty acid</kwd><kwd>hemoglobin</kwd><kwd>total antioxidant activity</kwd><kwd>antioxidant capacity</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Davies, K. J. 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