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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">I.P. Pavlov Journal of Higher Nervous Activity</journal-id><journal-title-group><journal-title xml:lang="en">I.P. Pavlov Journal of Higher Nervous Activity</journal-title><trans-title-group xml:lang="ru"><trans-title>Журнал высшей нервной деятельности им. И.П. Павлова</trans-title></trans-title-group></journal-title-group><issn publication-format="print">0044-4677</issn><issn publication-format="electronic">3034-5316</issn><publisher><publisher-name xml:lang="en">The Russian Academy of Sciences</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">692568</article-id><article-id pub-id-type="doi">10.31857/S0044467725050083</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>ФИЗИОЛОГИЧЕСКИЕ МЕХАНИЗМЫ ПОВЕДЕНИЯ ЖИВОТНЫХ: &#13;
ВОСПРИЯТИЕ ВНЕШНИХ СТИМУЛОВ, ДВИГАТЕЛЬНАЯ &#13;
АКТИВНОСТЬ, ОБУЧЕНИЕ И ПАМЯТЬ</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>ФИЗИОЛОГИЧЕСКИЕ МЕХАНИЗМЫ ПОВЕДЕНИЯ ЖИВОТНЫХ: ВОСПРИЯТИЕ ВНЕШНИХ СТИМУЛОВ, ДВИГАТЕЛЬНАЯ АКТИВНОСТЬ, ОБУЧЕНИЕ И ПАМЯТЬ</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 role of actin depolymerization in the mechanisms of ltp consolidation</article-title><trans-title-group xml:lang="ru"><trans-title>Роль деполимеризации актина в обеспечении долговременного поддержания синаптической потенциации</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Kudryashova</surname><given-names>I. V.</given-names></name><name xml:lang="ru"><surname>Кудряшова</surname><given-names>И. В.</given-names></name></name-alternatives><email>iv_kudryashova@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Higher Nervous Activity and Neurophysiology RAS</institution></aff><aff><institution xml:lang="ru">Федеральное государственное бюджетное учреждение науки Институт высшей нервной деятельности и нейрофизиологии РАН</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2025-10-15" publication-format="electronic"><day>15</day><month>10</month><year>2025</year></pub-date><volume>75</volume><issue>5</issue><issue-title xml:lang="en">VOL 75, NO5 (2025)</issue-title><issue-title xml:lang="ru">ТОМ 75, №5 (2025)</issue-title><fpage>597</fpage><lpage>611</lpage><history><date date-type="received" iso-8601-date="2025-10-08"><day>08</day><month>10</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2025, Russian Academy of Sciences</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2025, Российская академия наук</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="en">Russian Academy of Sciences</copyright-holder><copyright-holder xml:lang="ru">Российская академия наук</copyright-holder></permissions><self-uri xlink:href="https://innoscience.ru/0044-4677/article/view/692568">https://innoscience.ru/0044-4677/article/view/692568</self-uri><abstract xml:lang="en"><p>The change of CA1 LTP profile in response to high frequency stimulation of Schaffer collaterals after inhibition of actin depolymerization was studied in the rat hippocampal slices. For this purpose before tetanization the slices of experimental group were subjected to inhibitor of actin depolymerization jasplakinolide. To prevent additional activation of actin polymerization during LTP maintenance jasplakinolide infusion stopped 15 minutes after tetanization. In was supposed that the blockade of actin polymerization would prevent consolidation of long-term synaptic plasticity. The mean percentage of posttetanic amplitude increase 1 hour after tetanization with jasplakinolide was significantly less compared to control group. However decreased level of early LTP does not allow to relate this effect directly to impairment of LTP consolidation. To detect specific for consolidation jasplakinolide effects correlation analysis was performed or transformed variables, excluding the contribution of the factor of eLTP magnitude, were compared. It was found that under the same, including high, level of eLTP quite usual after tetanization 100 Hz 1 s depotentiation, was absent in the experimental, but not in the control group. This may indicate improved LTP maintenance, while decreased magnitude compared to control. According to other independent on different eLTP indices LTP maintenance at least was not impaired. The results do not confirm, although they do not disprove the hypothesis of actin depolymerization as a key factor of LTP consolidation. It is supposed that under blockade of actin depolymerization LTP maintenance may be mediated by the local protein synthesis in the dendrites.</p></abstract><trans-abstract xml:lang="ru"><p>В поле СА1 переживающих срезов гиппокампа крыс исследовали изменение динамики развития посттетанических модификаций после высокочастотного раздражения коллатералей Шаффера на фоне блокады деполимеризации актина. С этой целью тетанизация в группе экспериментальных срезов производилась после аппликации ингибитора деполимеризации актина джасплакинолида. Введение джасплакинолида в перфузионный раствор прекращали через 15 мин после тетанизации, чтобы исключить его влияние в фазе поддержания долговременной потенциации (ДВП). Предполагалось, что блокада деполимеризации актина может затруднять процесс консолидации долговременных перестроек синаптической передачи. Обнаружено, что через час после тетанизации на фоне джасплакинолида процент прироста амплитуды ответа достоверно меньше, чем в контроле, однако снижение ранней ДВП не позволяет однозначно связать этот эффект с нарушением механизмов консолидации ДВП. Для выявления специфичных для процесса консолидации эффектов препарата был использован корреляционный анализ, а также комплекс преобразований, позволяющих нивелировать вклад фактора дефицита ранней ДВП. Обнаружено, что при одном и том же, даже достаточно высоком, уровне ранней потенциации депотенциация, которая нередко наблюдается при тетанизации 100 Гц, 1 с, отсутствует в экспериментальной, но не в контрольной группе. Этот факт может свидетельствовать об улучшении поддержания ДВП, хотя и на более низком по сравнению с контролем уровне. По другим показателям, учитывающим различия в уровне ранней потенциации, поддержание ДВП как минимум не ухудшалось. Полученные результаты не подтверждают, хотя и не опровергают гипотезу о необходимости деполимеризации актина для консолидации долговременных перестроек синаптической передачи. Предполагается, что в условиях блокады деполимеризации актина поддержание потенциации может обеспечиваться за счет локального синтеза белка в дендритах.</p></trans-abstract><kwd-group xml:lang="en"><kwd>hippocampus</kwd><kwd>log-term plasticity</kwd><kwd>LTP</kwd><kwd>consolidation</kwd><kwd>actin depolymerization</kwd><kwd>actin polymerization</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>гиппокамп</kwd><kwd>долговременная потенциация</kwd><kwd>консолидация</kwd><kwd>деполимеризация актина</kwd><kwd>полимеризация актина</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена в рамках госзадания Министерства образования и науки Российской Федерации на 2025–2027 гг. Дополнительное внешнее финансирование отсутствует.</funding-statement></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Балабан П.М., Бородинова А.А. Нейрогенетические технологии исследования механизмов хранения памяти. Рос. Физиол. 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