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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">scbmt</journal-id><journal-title-group><journal-title xml:lang="ru">БИОМЕДИЦИНА</journal-title><trans-title-group xml:lang="en"><trans-title>Journal Biomed</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2074-5982</issn><issn pub-type="epub">2713-0428</issn><publisher><publisher-name>Scientific center of biomedical technologies of Federal Medical and Biological Agency</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.33647/2074-5982-18-2-31-39</article-id><article-id custom-type="elpub" pub-id-type="custom">scbmt-1385</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>МЕТОДЫ И ТЕХНОЛОГИИ БИОМЕДИЦИНСКИХ ИССЛЕДОВАНИЙ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>METHODS AND TECHNOLOGIES OF BIOMEDICAL RESEARCH</subject></subj-group></article-categories><title-group><article-title>Метод получения и изучения гелевого раствора с агаром для сохранения электрической активности срезов мозга крыс после их длительного криосохранения</article-title><trans-title-group xml:lang="en"><trans-title>Method for Obtaining and Studying a Gel Agar-Based Medium to Preserve the Electrical Activity of Rat Brain Slices after their Long–Term Cryopreservation</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>Мокрушин</surname><given-names>А. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Mokrushin</surname><given-names>A. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p> д.б.н.,</p><p>199034, Российская Федерация, Санкт-Петербург, наб. Макарова, 6 </p></bio><bio xml:lang="en"><p> Dr. Sci. (Biol.), </p><p> 199034, Russian Federation, St. Petersburg, Makarova Embankment, 6 </p></bio><email xlink:type="simple">mok@inbox.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБУН Институт физиологии им. И.П. Павлова РАН</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Pavlov Institute of Physiology of the Russian Academy of Sciences</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2022</year></pub-date><pub-date pub-type="epub"><day>10</day><month>06</month><year>2022</year></pub-date><volume>18</volume><issue>2</issue><fpage>31</fpage><lpage>39</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мокрушин А.А., 2022</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="ru">Мокрушин А.А.</copyright-holder><copyright-holder xml:lang="en">Mokrushin A.A.</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://journal.scbmt.ru/jour/article/view/1385">https://journal.scbmt.ru/jour/article/view/1385</self-uri><abstract><p>Биотехнология криосохранения позволяет длительно сохранять и восстанавливать биологические объекты. Она необходима для создания криобанка. Мы разработали двухкомпонентный замораживающий раствор, состоящий из искусственной цереброспинальной жидкости и агара в различных концентрациях. Эффективность раствора для длительного криосохранения (–10°С, 52 сут.) была исследована на переживающих срезах обонятельной коры мозга негибернирующих животных — крыс. В качестве функциональных индикаторов успешного криосохранения жизнеспособности срезов мозга были изучены изменения активностей a-амино-3-гидрокси-5-метилизоксазол-4-пропионовой кислоты (АМПА) и N-метил-D-аспартата (НМДА) глутаматергических механизмов. Были использованы различные концентрации агара: 33%, 44% и 50%. При концентрации 33% наблюдалась гиперактивация АМПА и восстановление НМДА механизмов по сравнению со значениями до криосохранения. При концентрации агара 44% происходила гиперактивация обоих механизмов. Полное восстановление активностей АМПА и НМДА механизмов после длительного криосохранения было достигнуто при концентрации агара 50%. Разработанный и исследованный нами замораживающий раствор на основе агара не содержит «тяжёлых» протекторов (диметилсульфоксида), антибиотиков, а также катионов, таких как Ba2+ и Sr2+, которые приводят к необратимой блокаде АМПА и НМДА механизмов. Таким образом, замораживающий раствор на основе агара способствует сохранению высокого уровня активности АМПА и НМДА механизмов в переживающих срезах при криосохранении. Разработанный раствор можно использовать для создания криобанка нервной ткани.</p></abstract><trans-abstract xml:lang="en"><p>Cryopreservation biotechnology allows a long-term preservation makes it possible to preserve and subsequent recovery of biological objects for a long time. It This technology is used for creating is necessary to create a cryobanks. In this work, wWe have developeded a two-component freezing solution consisting of an artificial cerebrospinal fluid and agar in different concentrations. The effectiveness of the solution in terms offor long-term cryopreservation was investigated on surviving slices of the olfactory cortex of the brain of such non-hibernating animals – as rats. Changes Variations in the activities of AMPA and NMDA glutamatergic mechanisms in brain slices were studied as functional indicators of successful cryopreservation. The following agar Different concentrations of agar were used: 33%, 44% and 50%. At a concentration of 33% agar, AMPA hyperactivation and recovery of NMDA recovery mechanisms were observed. At a concentration of 44% agar, hyperactivation of both mechanisms occurred. A cComplete recovery of the activities of the AMPA and NMDA mechanisms after prolonged cryopreservation (–10°C, 52 days) was achieved at an agar concentration of 50%. The developed freezing agar-based freezing solution developed and studied by us does not contains no “heavy” protectors (DMSO), antibiotics, and cations, such as Ba2+ and Sr2+, which normally lead to an irreversible blockade of AMPA and NMDA mechanisms. Thus, an the agar-based freezingdeveloped solution solution helpscontributes to maintaining a high level of activity of AMPA and NMDA activity mechanisms in slices during their cryopreservation. The developed solution can be used to create a cryobank of nervous tissue.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>срезы мозга крыс</kwd><kwd>криосохранение</kwd><kwd>агар</kwd><kwd>АМПА</kwd><kwd>НМДА механизмы</kwd><kwd>замораживание/отогревание</kwd></kwd-group><kwd-group xml:lang="en"><kwd>rat brain slices</kwd><kwd>cryopreservation</kwd><kwd>agar</kwd><kwd>AMPA</kwd><kwd>NMDA mechanisms</kwd><kwd>freezing/thawing</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">автор выражает признательность Г.П. Смирновой за помощь при проведении экспериментов, С.Е. Боровикову — за техническую помощь в наладке и обслуживании электрофизиологической установки.</funding-statement><funding-statement xml:lang="en">the author is grateful to G.P. Smirnova for her help with the experiments, S.E. Borovikov for technical assistance in installing and operating the electrophysiological setup.</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">Мокрушин А.А., Боровиков С.Е. Установка для изучения гипотермических эффектов на переживающих срезах мозга теплокровных. Международный журнал прикладных фундаментальных исследований. 2017;2(2):214–217.</mixed-citation><mixed-citation xml:lang="en">Mokrushin A.A., Borovikov S.E. 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