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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">microcirculation</journal-id><journal-title-group><journal-title xml:lang="ru">Регионарное кровообращение и микроциркуляция</journal-title><trans-title-group xml:lang="en"><trans-title>Regional blood circulation and microcirculation</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">1682-6655</issn><issn pub-type="epub">2712-9756</issn><publisher><publisher-name>Academician I.P. Pavlov First St. Petersburg State Medical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.24884/1682-6655-2018-17-4-75-80</article-id><article-id custom-type="elpub" pub-id-type="custom">microcirculation-264</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>ОРИГИНАЛЬНЫЕ СТАТЬИ (ЭКСПЕРИМЕНТАЛЬНЫЕ ИССЛЕДОВАНИЯ)</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>ORIGINAL ARTICLES (EXPERIMENTAL INVESTIGATIONS)</subject></subj-group></article-categories><title-group><article-title>Влияние фотоактивированного копропорфирина на микроциркуляцию</article-title><trans-title-group xml:lang="en"><trans-title>Influence of photoactivated coproporphirin on microcirculation</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>Гришачёва</surname><given-names>Т. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Grishacheva</surname><given-names>T. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>197022, Санкт-Петербург, ул. Льва Толстого, д. 6-8</p></bio><bio xml:lang="en"><p>junior researcher of Laser center of Academician,</p><p>197022, Saint Petersburg, L’va Tolstogo street, 6-8</p></bio><email xlink:type="simple">laser82@mail.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Федеральное государственное бюджетное образовательное учреждение высшего образования «Первый Санкт-Петербургский государственный медицинский университет имени академика И. П. Павлова» Министерства здравоохранения Российской Федерации</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Federal State Budgetary Educational Institution of Higher Education «Academician I. P. Pavlov First St. Petersburg State Medical University» of Ministry of Healthcare of the Russion Federation</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2018</year></pub-date><pub-date pub-type="epub"><day>19</day><month>02</month><year>2019</year></pub-date><volume>17</volume><issue>4</issue><fpage>75</fpage><lpage>80</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Гришачёва Т.Г., 2019</copyright-statement><copyright-year>2019</copyright-year><copyright-holder xml:lang="ru">Гришачёва Т.Г.</copyright-holder><copyright-holder xml:lang="en">Grishacheva T.G.</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.microcirc.ru/jour/article/view/264">https://www.microcirc.ru/jour/article/view/264</self-uri><abstract><p>Цель исследования – изучить влияние фотоактивированного копропорфирина III (КП III) на микроциркуляцию в брыжейке тонкой кишки крыс.</p><sec><title>Материал и методы</title><p>Материал и методы. Исследование проводили на 20 крысах-самцах, которых разделили на 4 группы: контроль; влияние КП III; влияние лазерного облучения; влияние лазерного облучения на фоне предварительного введения КП III. Объектом исследования были венулы (20–40 мкм) брыжейки тонкой кишки крыс. Исследование скорости кровотока в венулах проводили с использованием метода прижизненной биомикроскопии. Регистрация скоростных параметров микроциркуляции осуществлялась с помощью быстродействующей видеокамеры Basler acA2000 (Германия). Копропорфирин III («Элест», Россия) в дозе 10 мг/кг вводили в хвостовую вену за 3 ч до облучения. Облучение проводили с помощью полупроводникового лазерного аппарата «Лахта Милон» («Квалитек», Россия) (λ=635 нм; 0,1 Вт/см2 ; 300 с; 30 Дж/см2 ).</p></sec><sec><title>Результаты</title><p>Результаты. Введение КП III без последующего облучения не повлияло на изменение скорости кровотока в течение всего периода наблюдения. Лазерное облучение венул без предварительного введения КП III приводило к увеличению скорости кровотока на 39,1 % (р&lt;0,05). После лазерного облучения венул в той же дозе на фоне предварительного введения КП III наблюдалось постепенное уменьшение скорости кровотока уже после прекращения процесса фотоактивации.</p></sec><sec><title>Выводы</title><p>Выводы. Изучено влияние фотоактивированного КП III на микроциркуляцию в брыжейке тонкой кишки крыс. Изменения кровотока в венулах в брыжейке крыс под воздействием КП III при используемых параметрах лазерного облучения развиваются, главным образом, в пострадиационном периоде и, по-видимому, связаны с дисфункцией эндотелия. </p></sec></abstract><trans-abstract xml:lang="en"><p>The aim – to investigate the effect of photoactivated coproporphyrin III (KP III) on microcirculation in the rat mesenteric vascular bed. Material and methods. The study was performed on 20 male rats, divided into 4 groups: 1) control; 2) KP III; 3) laser irradiation; 4) laser irradiation on combined with prior administration of the KP III.</p><p>The object of the study was venules (20–40 µm) of the mesentery of the small intestine. The study of blood flow velocity in the venules was performed using the method of intravital biomicroscopy. The velocity parameters were registered using a high-speed video camera Basler acA2000 (Germany). Coproporphyrin III (Elast, Russia) at a dose of 10 mg/kg was injected into the tail vein 3 hours before laser irradiation. Irradiation was performed using a Lakhta Milon semiconductor laser apparatus (Qualitek, Russia) (λ=635 nm, 0.1 W/cm2 ; 300 s; 30 J/cm2 ).</p><sec><title>Results</title><p>Results. Administration of KP III without subsequent irradiation did not affect the blood flow velocity during the entire observation period. Laser irradiation of venules without prior administration of KP III led to an increase in blood flow velocity by 39.1 % (p&lt;0.05). After laser irradiation and administration of KPIII, there was a gradual decrease in flow velocity after the photoactivation process.</p></sec><sec><title>Conclusions</title><p>Conclusions. We studied the effect of photoactivated KP III on microcirculation in the mesentery of the small intestine of rats. Changes in the blood flow velocity in the venules of the mesentery affected by KP III and laser irradiation develop mainly in the post-radiation period and could be associated with endothelial dysfunction. </p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>микроциркуляция</kwd><kwd>фотосенсибилизатор</kwd><kwd>копропорфирин</kwd><kwd>фотодинамическая терапия</kwd><kwd>скорость кровотока</kwd><kwd>крысы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>microcirculation</kwd><kwd>photosensitizer</kwd><kwd>coproporphirin</kwd><kwd>photodynamic therapy</kwd><kwd>mean blood velocity</kwd><kwd>rats</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">Chuannong Zhou. Mechanisms of tumor destruction caused by photodynamic therapy. Proc. SPIE 5967, 2004 Shanghai International Conference on Laser Medicine and Surgery, 596706 (11 September 2006). 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