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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">ometendo</journal-id><journal-title-group><journal-title xml:lang="ru">Ожирение и метаболизм</journal-title><trans-title-group xml:lang="en"><trans-title>Obesity and metabolism</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2071-8713</issn><issn pub-type="epub">2306-5524</issn><publisher><publisher-name>Endocrinology Research Centre</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.14341/omet12789</article-id><article-id custom-type="elpub" pub-id-type="custom">ometendo-12789</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>Научные исследования</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Original studies</subject></subj-group></article-categories><title-group><article-title>Особенности моделирования жирового гепатоза у крыс разного возраста на основе высококалорийного рациона</article-title><trans-title-group xml:lang="en"><trans-title>Features of modeling fatty liver disease in rats of different ages based on a high-calorie diet</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0397-7517</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Янко</surname><given-names>Р. В</given-names></name><name name-style="western" xml:lang="en"><surname>Yanko</surname><given-names>R. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Янко Роман Васильевич - кандидат биологических наук; eLibrary SPIN: 7701-2184.</p><p>01024, Киев, ул. Богомольца, д. 4</p></bio><bio xml:lang="en"><p>Roman V. Yanko - PhD in biology; eLibrary SPIN: 7701-2184.</p><p>4 Bogomolets Street, 01024 Kiev</p></bio><email xlink:type="simple">biolag@bigmir.net</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-7425-2751</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чака</surname><given-names>Е. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Chaka</surname><given-names>E. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Чака Елена Георгиевна - кандидат биологических наук; eLibrary SPIN: 9509-2563.</p><p>Киев</p></bio><bio xml:lang="en"><p>Elena G. Chaka - PhD in biology; eLibrary SPIN: 9509-2563.</p><p>Kiev</p></bio><email xlink:type="simple">lenchaka@ukr.net</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4824-7689</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Зинченко</surname><given-names>А. С.</given-names></name><name name-style="western" xml:lang="en"><surname>Zinchenko</surname><given-names>A. S.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Зинченко Анастасия Сергеевна - аспирант</p><p>Киев</p></bio><bio xml:lang="en"><p>Anastasia S. Zinchenko - postgraduate student.</p><p>Kiev</p></bio><email xlink:type="simple">anastazi.de.resto@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4785-0315</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Сафонов</surname><given-names>С. Л.</given-names></name><name name-style="western" xml:lang="en"><surname>Safonov</surname><given-names>S. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Сафонов Сергей Леонидович - Отдел клинической физиологии соединительной ткани, ведущий инженер.</p><p>Киев</p></bio><bio xml:lang="en"><p>Sergey L. Safonov</p><p>Kiev</p></bio><email xlink:type="simple">sersaffiz@gmail.com</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-1354-2047</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Левашов</surname><given-names>М. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Levashov</surname><given-names>M. L.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Левашов Михаил Иванович - доктор медицинских наук; eLibrary SPIN: 7467-9830</p><p>Киев</p></bio><bio xml:lang="en"><p>Mikhail I. Levashov - MD, PhD; eLibrary SPIN: 7467-9830.</p><p>Kiev</p></bio><email xlink:type="simple">levashov@biph.kiev.ua</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>Институт физиологии им. А.А. Богомольца, Национальная академия наук Украины</institution><country>Украина</country></aff><aff xml:lang="en"><institution>Bogomoletz Institute of Physiology</institution><country>Ukraine</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2021</year></pub-date><pub-date pub-type="epub"><day>18</day><month>02</month><year>2022</year></pub-date><volume>18</volume><issue>4</issue><fpage>387</fpage><lpage>397</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Янко Р.В., Чака Е.Г., Зинченко А.С., Сафонов С.Л., Левашов М.И., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Янко Р.В., Чака Е.Г., Зинченко А.С., Сафонов С.Л., Левашов М.И.</copyright-holder><copyright-holder xml:lang="en">Yanko R.V., Chaka E.G., Zinchenko A.S., Safonov S.L., Levashov M.L.</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.omet-endojournals.ru/jour/article/view/12789">https://www.omet-endojournals.ru/jour/article/view/12789</self-uri><abstract><sec><title>Обоснование</title><p>Обоснование. Проблема диагностики, лечения и профилактики жирового гепатоза (ЖГ) является одной из актуальных проблем современной медицины. В этой связи возникает потребность в создании надежных экспериментальных моделей ЖГ, которые были бы максимально приближены к патогенетическим закономерностям развития данного заболевания у человека.</p></sec><sec><title>Цель</title><p>Цель. Создание экспериментальной модели ЖГ и сравнение эффективности ее воспроизведения у крыс разного возраста.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Исследование проведено на крысах-самцах линии Wistar, возраст которых в начале эксперимента составлял 3 и 18 мес. Контрольные животные находились на стандартном рационе питания. Подопытные крысы в течение 12 нед содержались на рационе с избыточным содержанием жиров (45%) и углеводов (31%). Для морфологических исследований ЖГ отбирали образцы ткани печени, из которых изготавливали гистологические препараты по стандартной методике. Морфометрию на цифровых изображениях микропрепаратов осуществляли с помощью компьютерной программы IMAGE J. В ткани печени определяли концентрацию липидов, холестерина и триглицеридов, а в сыворотке крови определяли концентрацию аланинаминотрансферазы. Для оценки биофизических свойств печеночной ткани использовали метод мультичастотной биоимпедансометрии.</p></sec><sec><title>Результаты</title><p>Результаты. О наличии ЖГ после влияния предложенного нами высококалорийного рациона свидетельствуют увеличенная масса печени, ее бледноватый оттенок и мягкая консистенция. Также выявлены морфометрические признаки ЖГ: гипертрофия гепатоцитов с одновременным снижением ядерно-цитоплазматического соотношения, накопление в цитоплазме многочисленных липидных включений, появление крупных липидных капель, которые замещали пустоты погибших гепатоцитов, снижение количества двуядерных гепатоцитов и ядрышек в ядрах, уменьшение относительной площади сети синусоидов. Наблюдали возрастание концентрации липидов, холестерина и триглицеридов в ткани печени подопытных крыс, а также активности аланинаминотрансферазы в сыворотке крови. Изменение показателей биоимпедансометрии печеночной ткани также свидетельствовало о развитии выраженной жировой дистрофии печени как у молодых (в большей степени), так и у зрелых крыс.</p></sec><sec><title>Заключение</title><p>Заключение. Предложенная нами модель ЖГ на основе комбинированного (жироуглеводного) высококалорийного рациона у всех подопытных крыс приводит к развитию выраженных морфологических, биохимических и биофизических признаков данной патологии. Наиболее выраженные проявления ЖГ наблюдаются у молодых животных.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>BACKGROUND</title><p>BACKGROUND: The problem of diagnosis, treatment and prevention of fat liver disease (FLD) is one of the actual problems of modern medicine. In this regard, the need for the creation of reliable experimental models of the FLD, which would be as close as possible to the pathogenetic patterns of the development of this disease in humans.</p></sec><sec><title>AIM</title><p>AIM: To create an experimental model of FLD and compare the efficiency of its reproduction in rats of different ages.</p></sec><sec><title>MATERIALS AND METHODS</title><p>MATERIALS AND METHODS: The study was conducted on male Wistar rats, whose ages at the beginning of the experiment were 3 and 18 months. Control animals were fed a standard diet. The experimental rats were kept on a diet with excess fat (45 %) and carbohydrates (31 %) for 12 weeks. The liver tissue samples were taken for morphological studies of FLD. Histological preparations were made according to the standard technique. Morphometry on digital images of micropreparations was conducted using the computer program «IMAGE J». The concentration of lipids, cholesterol, and triglecerides in the liver tissue was determined, and the concentration of ALT in the blood serum was determined. To assess the biophysical properties of the liver tissue, the method of multifrequency bioimpedance measurement was used.</p></sec><sec><title>RESULTS</title><p>RESULTS: The transfer of animals to a high-calorie diet developed by us led to the development of FLD. This was evidenced by an increase of the liver mass, its pale shade and soft consistency. Morphometric signs of FLD were also revealed. Hypertrophy of hepatocytes was observed with a simultaneous decrease in the nuclear-cytoplasmic ratio; accumulation of numerous lipid inclusions in the cytoplasm and the appearance of large lipid droplets replacing the voids of dead hepatocytes. The number of binuclear hepatocytes and nucleolus in the nucleus, the relative area of the sinusoid network were decreased. An increase in the concentration of lipids, cholesterol and triglecerides in the liver tissue of experimental rats, as well as the activity of ALT in the blood serum, was observed. Changes in the bioimpedance measurements of the liver tissue also indicated the  development of severe fatty degeneration of the liver in both young (to a greater extent) and old rats.</p></sec><sec><title>CONCLUSION</title><p>CONCLUSION: The model of FLD we have advanced based on a combined (fat-carbohydrate) high-calorie diet. It leads to the development of pronounced morphological, biochemical and biophysical signs of this pathology in all experimental rats. The most pronounced manifestations of FLD are observed in young animals.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>печень</kwd><kwd>жировой гепатоз</kwd><kwd>высококалорийный рацион</kwd></kwd-group><kwd-group xml:lang="en"><kwd>liver</kwd><kwd>fatty liver disease</kwd><kwd>high-calorie diet</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках государственного задания «Институт физиологии им. А.А. Богомольца НАН Украины» (№ 0119U103965). Также эта работа частично поддержана из средств НАН Украины для поддержки развития приоритетных направлений исследований СРН (№ 0118U007344)</funding-statement></funding-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Maurice J, Manousou P. Non-alcoholic fatty liver disease. 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