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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="other" dtd-version="1.2" xml:lang="en"><front><journal-meta><journal-id journal-id-type="publisher-id">Psychopharmacology and Addiction Biology</journal-id><journal-title-group><journal-title xml:lang="en">Psychopharmacology and Addiction Biology</journal-title><trans-title-group xml:lang="ru"><trans-title>Психофармакология и биологическая наркология</trans-title></trans-title-group></journal-title-group><issn publication-format="print">1606-8181</issn><issn publication-format="electronic">2070-5670</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">689948</article-id><article-id pub-id-type="doi">10.17816/phbn689948</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Original Study Articles</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Оригинальные исследования</subject></subj-group><subj-group subj-group-type="article-type"><subject></subject></subj-group></article-categories><title-group><article-title xml:lang="en">CORRECTION OF THE TIME COURSE OF ACTIVE SWIMMING IN RATS BY PEPTIDE ANALOGS OF THE C-TERMINAL FRAGMENT OF ARGININE-VASOPRESSIN</article-title><trans-title-group xml:lang="ru"><trans-title>КОРРЕКЦИЯ ВРЕМЕННОЙ ДИНАМИКИ АКТИВНОГО ПЛАВАНИЯ КРЫС ПЕПТИДНЫМИ АНАЛОГАМИ С-КОНЦЕВОГО ФРАГМЕНТА АРГИНИН-ВАЗОПРЕССИНА</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-6187-199X</contrib-id><contrib-id contrib-id-type="spin">2760-0429</contrib-id><name-alternatives><name xml:lang="en"><surname>Savanets</surname><given-names>Oksana</given-names></name><name xml:lang="ru"><surname>Саванец</surname><given-names>Оксана Николаевна</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>Researcher. Toxicology Laboratory of the Department of Pharmacology and Pharmacy</p></bio><bio xml:lang="ru"><p>Научный сотрудник лаборатории токсикологии отдела фармакологии и фармации. </p></bio><email>oksana.savanez.96@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-2449-5518</contrib-id><name-alternatives><name xml:lang="en"><surname>Kravchenko</surname><given-names>Elena</given-names></name><name xml:lang="ru"><surname>Кравченко</surname><given-names>Елена Валериевна</given-names></name></name-alternatives><address><country country="BY">Belarus</country></address><bio xml:lang="en"><p>Ph. D. (Biology), Associate Professor, Leading researcher. Toxicology Laboratory of the Department of Pharmacology and Pharmacy</p></bio><bio xml:lang="ru"><p>Кандидат биологических наук, доцент, ведущий научный сотрудник лаборатории токсикологии отдела фармакологии и фармации</p></bio><email>kravchenko@iboch.by</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="spin">1397-9122</contrib-id><name-alternatives><name xml:lang="en"><surname>Olgomets</surname><given-names>Lyubov</given-names></name><name xml:lang="ru"><surname>Ольгомец</surname><given-names>Любовь Михайловна</given-names></name></name-alternatives><bio xml:lang="en"><p>Senior researcher. Toxicology Laboratory of the Department of Pharmacology and Pharmacy</p></bio><bio xml:lang="ru"><p>Старший научный сотрудник лаборатории токсикологии отдела фармакологии и фармации</p></bio><email>olgomets@iboch.by</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-4676-843X</contrib-id><name-alternatives><name xml:lang="en"><surname>Baradzina</surname><given-names>Kseniya</given-names></name><name xml:lang="ru"><surname>Бородина</surname><given-names>Ксения Владимировна</given-names></name></name-alternatives><bio xml:lang="en"><p>Researcher. Applied Biochemistry Laboratory</p></bio><bio xml:lang="ru"><p>Научный сотрудник лаборатории прикладной биохимии</p></bio><email>borodina@iboch.by</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6640-3388</contrib-id><name-alternatives><name xml:lang="en"><surname>Gribovskaya</surname><given-names>Olga</given-names></name><name xml:lang="ru"><surname>Грибовская</surname><given-names>Ольга Викторовна</given-names></name></name-alternatives><bio xml:lang="en"><p>Ph. D. (Chemistry), Leading researcher. Applied Biochemistry Laboratory.</p></bio><bio xml:lang="ru"><p>Кандидат химических наук, ведущий научный сотрудник лаборатории прикладной биохимии</p></bio><email>o.gribovskaya@iboch.by</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Institute of Bioorganic Chemistry of the National Academy of Sciences of Belarus</institution></aff><aff><institution xml:lang="ru">ГНУ "Институт биоорганической химии Национальной академии наук Беларуси"</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en"></institution></aff><aff><institution xml:lang="ru">ГНУ "Институт биоорганической химии Национальной академии наук Беларуси"</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2026-01-09" publication-format="electronic"><day>09</day><month>01</month><year>2026</year></pub-date><volume>16</volume><issue>4</issue><issue-title xml:lang="ru"/><history><date date-type="received" iso-8601-date="2025-08-28"><day>28</day><month>08</month><year>2025</year></date><date date-type="accepted" iso-8601-date="2025-12-05"><day>05</day><month>12</month><year>2025</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; , Eco-Vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; , Эко-Вектор</copyright-statement><copyright-holder xml:lang="en">Eco-Vector</copyright-holder><copyright-holder xml:lang="ru">Эко-Вектор</copyright-holder><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc-nd/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://journals.eco-vector.com/1606-8181/article/view/689948">https://journals.eco-vector.com/1606-8181/article/view/689948</self-uri><abstract xml:lang="en"><p><bold><italic>BACKGROUND: </italic></bold>Unpredictable changes in environmental conditions, being stressful effects, affect the oscillatory processes of a living organism. Antidepressants of various classes have a chronotropic component in the spectrum of pharmacological activity, but their use is accompanied by a number of side effects.</p> <p><bold><italic>AIM</italic></bold><bold>:</bold> study of the possible corrective effect of synthetic analogues of the C-terminal fragment of AVP in comparison with fluoxetine, in particular, when assessing the structure of active swimming in the forced swimming test.</p> <p><bold><italic>METHODS:</italic></bold><italic> </italic>The chronopharmacological properties of synthetic analogues of the C-terminal fragment of AVP were studied using a forced swimming test (FST). Sexually mature male Wistar rats (n=89) were placed in a water vessel twice for 16 minutes. When the laboratory animal was repeatedly immersed in the pool, the number of episodes of active swimming <bold><italic>(n)</italic></bold> with harmonics of less than 6 s, 6-18 s and more than 18 s was recorded. Experimental work was carried out in the autumn-winter period of the year (September-January) from 13:00 to 15:30 h under artificial lighting (light source – daylight lamp SL 36/26-735). Synthetic analogs of the C-terminal fragment of arginine-vasopressin N-Ac-DSer-Pro-DArg-Gly-NH<sub>2</sub> <bold><italic>(IV)</italic></bold> and N-Ac-Trp-Pro-Arg-Gly-NH<sub>2</sub> <bold><italic>(V)</italic></bold> were administered at doses of 0.1; 1.0 and 10.0 μg/kg, fluoxetine at 20 mg/kg.</p> <p><bold><italic>RESULTS:</italic></bold><italic> </italic>Tetrapeptide <bold><italic>V</italic></bold> at a dose of 1.0 μg/kg had the most favorable effect on the time dynamics of active swimming of animals under forced swimming conditions. <bold><italic>V</italic></bold> reduced the short-period rhythms of active stroke movements, contributed to a statistically significant increase in the number of episodes of active swimming lasting more than 18 seconds compared to a stressed control (like fluoxetine), and also contributed to a statistically significant increase in swimming cycles lasting 6-18 seconds (which was not achieved with the introduction of a standard antidepressant).</p> <p><bold><italic>CONCLUSION: </italic></bold>Compound <bold><italic>V</italic></bold> at a dose of 1.0 μg/kg contributed to an increase in adaptation processes in a stressful situation of FS, and is promising for further study of pharmacological properties.</p></abstract><trans-abstract xml:lang="ru"><p><bold>Обоснование. </bold>Непредсказуемые изменения условий внешней среды, являясь стрессирующими воздействиями, влияют на колебательные процессы живого организма. Антидепрессанты различных классов имеют хронотропную составляющую в спектре фармакологической активности, однако их применение сопровождается рядом побочных эффектов.</p> <p><bold>Цель исследования: </bold>изучить возможное корректорное действие синтетических аналогов С-концевого фрагмента АВП в сравнении с флуоксетином, в частности, при оценке структуры активного плавания в тесте принудительного плавания.</p> <p><bold>Методы. </bold>Хронофармакологические свойства<bold> </bold>синтетических аналогов С-концевого фрагмента АВП изучали, используя тест принудительного плавания (ПП). Половозрелых крыс-самцов Wistar (n=89) двукратно на 16 мин помещали в сосуд с водой. При повторном погружении лабораторного животного в бассейн регистрировали число эпизодов активного плавания <bold>(<italic>n</italic>)</bold> с гармониками менее 6 с, 6-18 с и более 18 с. Экспериментальные работы проводили в осенне-зимний период года (сентябрь-январь) с 13:00 до 15:30 ч при искусственном освещении (источник освещения – лампа дневного света SL 36/26-735). Синтетические аналоги С-концевого фрагмента аргинин-вазопрессина N-Ac-DSer-Pro-DArg-Gly-NH<sub>2</sub> <bold>(<italic>IV</italic>)</bold> и N-Ac-Trp-Pro-Arg-Gly-NH<sub>2</sub> <bold>(<italic>V</italic>)</bold> вводили в дозах 0,1; 1,0 и 10,0 мкг/кг, флуоксетин – в дозе 20 мг/кг.</p> <p><bold>Результаты.</bold> Наиболее благоприятное воздействие на временную динамику активного плавания животных в условиях ПП оказывал тетрапептид <bold><italic>V</italic></bold> в дозе 1,0 мкг/кг. <bold><italic>V</italic></bold> редуцировал короткопериодные ритмы активных гребковых движений, способствовал статистически достоверному возрастанию числа эпизодов активного плавания длительностью свыше 18 с в сравнении со стрессированным контролем (как и флуоксетин), а кроме того, способствовал статистически достоверному увеличению циклов плавания продолжительностью 6-18 с (что не достигалось при введении стандартного антидепрессанта).</p> <p><bold>Заключение. </bold>Соединение <bold><italic>V </italic></bold>в дозе 1,0 мкг/кг способствовало повышению адаптационных процессов в стрессовой ситуации ПП, является перспективным для дальнейшего изучения фармакологических свойств.</p></trans-abstract><kwd-group xml:lang="en"><kwd>forced swimming</kwd><kwd>stress</kwd><kwd>arginine-vasopressin</kwd><kwd>tetrapeptides</kwd><kwd>fluoxetine</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>принудительное плавание</kwd><kwd>стресс</kwd><kwd>аргинин-вазопрессин</kwd><kwd>тетрапептиды</kwd><kwd>флуоксетин</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">Институт биоорганической химии НАН Беларуси</institution></institution-wrap><institution-wrap><institution xml:lang="en">Institute of Bioorganic Chemistry of the National Academy of Sciences of Belarus</institution></institution-wrap></funding-source></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Ovanesov KB, Beyer EV, Kaminskaya OV, et al. Chronopharmacological aspects of anti-stress effects of anxiolytic agents. Experimental neuropsychopharmacology. 2023;14(1):40–47. EDN: WMLQFW doi: 10.17816/phbn321620</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Porsolt RD, Pichon MLe, Jalfre M, Depression: a new animal model sensitive to antidepressant treatments. Nature. 1977;266(5604):730–732. doi: 10.1038/266730a0</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Schetinin EV, Baturin VA, Arushanian EB, et al. Chrono-biological approach to forced swimming test as a model of behavioural depression. I.P. Pavlov Journal of Higher Nervous Activity. 1989;39(5):958–964. EDN: QCEHRD</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Arushanian EB, Kaminskaya OV, Beyer EV, Removal of the epiphysis weakens the specific action of anxiolytics and antidepressants. Reviews on Clinical Pharmacology and Drug Therapy. 2018; (16 suppl. 1):17.</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Wang C, Gao S, Hendrie HC, et al. Antidepressant use in the elderly is associated with an increased risk of dementia. Alzheimer Dis. Assoc. Disord. 2016;30(2):99–14. doi: 10.1097/WAD.0000000000000103</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Ostrovskaya RU, Gudasheva TA, Dipeptide drug Noopept: design, pharmacological properties and mechanism of action. Experimental and clinical pharmacology. 2021;84(2):41–52. EDN: LUACJW doi: 10.30906/0869-2092-2021-84-2-41-52</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Borodina KV, Savanets ON, Pustyulga ES, et al. Synthesis and investigation of antidepressant properties of novel arginine-vasopressin analogues. Bioorganic chemistry. 2022;48(3):357–370. EDN: DIKUZY doi: 10.31857/S0132342322030058</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Kravchenko EV, Savanets ON, Olgomets LM, et al. Effect of proline-containing oligopeptides on peculiarities of operant conditioning of behavior in outbred rats. Proceedings of the National Academy of Sciences of Belarus. Biological series. 2024;69(2):120–133. EDN: HGBYQN doi: 10.29235/1029-8940-2024-69-2-120-133</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Kaminskaya OV, Popov AV, Effect of chronic administration of fluoxetine, melatonin and their combination on the timecourse of the circadian rhythm of motor activity in rats. Medical News of North Caucasus. 2018;13(2):399–402. EDN: XTWXRR. doi: 10.14300/mnnc.2018.13061</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Wallace T, Steinfeld T, Poffe A, et al. Vasopressin 1A (V1A) receptor antagonists reduce anxiety in marmosets. Biological Psychiatry. 2020;87(9):239. EDN: JXSPFC doi: 10.1016/j.biopsych.2020.02.620.</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Kudryashov NV, Naplekova PL, Volkova AV, et al. Effects of Acute Swimming Stress on the Behavioral and Neurochemical Effects of Pyrazolo[C]pyridine Derivative GIZh-72 and Diazepam in BALB/c and C57BL/6 Mice. Neuroscience and Behavioral Physiology. 2022;52(1):135–149. EDN: YQDTUI. doi: 10.1007/s11055-022-01215-5</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Egashira N, Mishima K, Iwasaki K, et al. New Topics in Vasopressin Receptors and Approach to Novel Drugs: Role of the Vasopressin Receptor in Psychological and Cognitive Functions. J Pharmacol Sci. 2009;109: 44–49. doi: 10.1254/jphs.08R14FM</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Cragg B, Guangchen J, Neugebauer V, Differential contributions of vasopressin V1A and oxytocin receptors in the amygdala to pain-related behaviors in rats. Molecular Pain. 2016;12:1744806916676491. doi: 10.1177/1744806916676491</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Barson JR, Mack NR, Gao W-J, The paraventricular nucleus of the thalamus is an important node in the emotional processing network. Front. Behav. Neurosci. 2016;14:598469. EDN: EPUUOJ doi: 10.3389/fnbeh.2020.598469.</mixed-citation></ref></ref-list></back></article>
