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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">pharmjournal</journal-id><journal-title-group><journal-title xml:lang="ru">Разработка и регистрация лекарственных средств</journal-title><trans-title-group xml:lang="en"><trans-title>Drug development &amp; registration</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2305-2066</issn><issn pub-type="epub">2658-5049</issn><publisher><publisher-name>LLC «CPHA»</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.33380/2305-2066-2026-15-2-2186</article-id><article-id custom-type="elpub" pub-id-type="custom">pharmjournal-2343</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>ДОКЛИНИЧЕСКИЕ И КЛИНИЧЕСКИЕ ИССЛЕДОВАНИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PRECLINICAL AND CLINICAL STUDIES</subject></subj-group></article-categories><title-group><article-title>Исследование влияния метформина в малых дозах на поведенческие характеристики и биохимические показатели половозрелых крыс</article-title><trans-title-group xml:lang="en"><trans-title>Study of the effect of metformin in small doses on the behavioral characteristics and biochemical parameters of rats</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0007-3795-1407</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Хафизова</surname><given-names>А. З.</given-names></name><name name-style="western" xml:lang="en"><surname>Hafizova</surname><given-names>A. Z.</given-names></name></name-alternatives><bio xml:lang="ru"><p>420012, Приволжский федеральный округ, Республика Татарстан, г. Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>49, Butlerova str., Kazan, Republic of Tatarstan, Volga Federal District, 420012</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5773-867X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Никитин</surname><given-names>Д. О.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikitin</surname><given-names>D. O.</given-names></name></name-alternatives><bio xml:lang="ru"><p>420012, Приволжский федеральный округ, Республика Татарстан, г. Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>49, Butlerova str., Kazan, Republic of Tatarstan, Volga Federal District, 420012</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5316-8902</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Садыкова</surname><given-names>Р. Г.</given-names></name><name name-style="western" xml:lang="en"><surname>Sadykova</surname><given-names>R. G.</given-names></name></name-alternatives><bio xml:lang="ru"><p>420012, Приволжский федеральный округ, Республика Татарстан, г. Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>49, Butlerova str., Kazan, Republic of Tatarstan, Volga Federal District, 420012</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0008-8002-645X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Гаврилова</surname><given-names>В. Б.</given-names></name><name name-style="western" xml:lang="en"><surname>Gavrilova</surname><given-names>V. B.</given-names></name></name-alternatives><bio xml:lang="ru"><p>420012, Приволжский федеральный округ, Республика Татарстан, г. Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>49, Butlerova str., Kazan, Republic of Tatarstan, Volga Federal District, 420012</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-6219-6246</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Никитина</surname><given-names>А. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Nikitina</surname><given-names>A. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>420012, Приволжский федеральный округ, Республика Татарстан, г. Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>49, Butlerova str., Kazan, Republic of Tatarstan, Volga Federal District, 420012</p></bio><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0916-2853</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мустафин</surname><given-names>Р. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Moustafine</surname><given-names>R. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>420012, Приволжский федеральный округ, Республика Татарстан, г. Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>49, Butlerova str., Kazan, Republic of Tatarstan, Volga Federal District, 420012</p></bio><email xlink:type="simple">ruslan.mustafin@kazangmu.ru</email><xref ref-type="aff" rid="aff-1"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3515-0845</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Семина</surname><given-names>И. И.</given-names></name><name name-style="western" xml:lang="en"><surname>Semina</surname><given-names>I. I.</given-names></name></name-alternatives><bio xml:lang="ru"><p>420012, Приволжский федеральный округ, Республика Татарстан, г. Казань, ул. Бутлерова, д. 49</p></bio><bio xml:lang="en"><p>49, Butlerova str., Kazan, Republic of Tatarstan, Volga Federal District, 420012</p></bio><email xlink:type="simple">irina.semina@kazangmu.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 «Казанский государственный медицинский университет» Министерства здравоохранения Российской Федерации (ФГБОУ ВО Казанский ГМУ Минздрава России)</institution></aff><aff xml:lang="en"><institution>Kazan State Medical University of the Ministry of Health of Russia</institution></aff></aff-alternatives><pub-date pub-type="collection"><year>2026</year></pub-date><pub-date pub-type="epub"><day>11</day><month>06</month><year>2026</year></pub-date><volume>15</volume><issue>2</issue><fpage>137</fpage><lpage>145</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Хафизова А.З., Никитин Д.О., Садыкова Р.Г., Гаврилова В.Б., Никитина А.В., Мустафин Р.И., Семина И.И., 2026</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="ru">Хафизова А.З., Никитин Д.О., Садыкова Р.Г., Гаврилова В.Б., Никитина А.В., Мустафин Р.И., Семина И.И.</copyright-holder><copyright-holder xml:lang="en">Hafizova A.Z., Nikitin D.O., Sadykova R.G., Gavrilova V.B., Nikitina A.V., Moustafine R.I., Semina I.I.</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.pharmjournal.ru/jour/article/view/2343">https://www.pharmjournal.ru/jour/article/view/2343</self-uri><abstract><sec><title>Введение</title><p>Введение. Метформин – пероральное противодиабетическое средство с известным профилем эффективности и безопасности. В настоящее время появляется все больше данных о влиянии метформина на функции ЦНС в малых дозах, не связанных с гипогликемическим действием, с целью воздействия на процесс старения и сопутствующих возраст-ассоциированных заболеваний. Однако сведений о влиянии метформина на поведенческие характеристики и когнитивные функции здорового организма недостаточно.</p></sec><sec><title>Цель</title><p>Цель. Исследование влияния метформина в малых дозах на поведенческие характеристики и некоторые биохимические показатели сыворотки крови (уровень глюкозы, холестерина, липопротеинов низкой плотности (ЛПНП)) половозрелых крыс.</p></sec><sec><title>Материалы и методы</title><p>Материалы и методы. Исследование выполнено на 72 крысах-самцах линии Wistar массой 200–250 г. После 30-дневного введения метформина в дозах 35 и 70 мг/кг было проведено поведенческое тестирование. Для исследования влияния на процессы обучения и памяти применяли установку «Т-образный лабиринт», для изучения пространственной памяти – «Водный лабиринт Морриса». Установки «Приподнятый крестообразный лабиринт» и «Экстраполяционное избавление» применяли для оценки влияния метформина на состояние тревожности крыс. Для оценки влияния на физическую активность крыс применяли комплекс «Ротарод». Измерение биохимических показателей сыворотки крови крыс проводилось на автоматическом биохимическом анализаторе DIRUI CS-300B.</p></sec><sec><title>Результаты и обсуждение</title><p>Результаты и обсуждение. Установлено, что 30-дневное введение метформина в обеих дозах (35 и 70 мг/кг) улучшало процессы обучения и памяти в тесте «Т-образный лабиринт» (р &lt; 0,05). Кроме того, введение метформина в малых дозах (35 и 70 мг/кг) способствовало развитию анксиолитического эффекта в тесте «Приподнятый крестообразный лабиринт» и «Экстраполяционное избавление» (р &lt; 0,05). Показано, что введение метформина (70 мг/кг) улучшало мышечную выносливость крыс в тесте «Ротарод» (р &lt; 0,05) на фоне неизменного уровня глюкозы.</p></sec><sec><title>Заключение</title><p>Заключение. Результаты проведенных исследований определяют направление дальнейшего исследования по изучению возможности применения метформина в дозах, не оказывающих гипогликемического действия, для коррекции тревожных и когнитивных нарушений при патологических состояниях ЦНС, в том числе в процессе физиологического старения.</p></sec></abstract><trans-abstract xml:lang="en"><sec><title>Introduction</title><p>Introduction. Metformin is an oral antidiabetic drug with a known efficacy and safety profile. Currently, there is more data on the effect of metformin on central nervous system functions in small doses, not associated with hypoglycemic effects to influence the aging process and concomitant age-related diseases. However, there is insufficient information about the effect of metformin on the behavioral characteristics and cognitive functions of a healthy body.</p></sec><sec><title>Aim</title><p>Aim. Investigation of the effect of metformin in small doses on behavioral characteristics and some biochemical parameters of blood serum (glucose, cholesterol, and low-density lipoprotein (LDL) levels) in rats.</p></sec><sec><title>Materials and methods</title><p>Materials and methods. The study was performed on 72 male rats weighing 200–250 g of the Wistar line. Behavioral testing was performed after 30 days of metformin administration at doses of 35 and 70 mg/kg. The «T-maze test» installation was used to study the effects on learning and memory processes, and the «Water maze test» was used to study spatial memory. The «Elevated plus-maze test» and «Extrapolation escape task» settings were used to assess the effect of metformin on anxiety in rats. «The Rotarod» complex was used to assess the effect on the physical activity of rats. The biochemical parameters of rat blood serum were measured using an automatic DIRUI CS-300B biochemical analyzer.</p></sec><sec><title>Results and discussion</title><p>Results and discussion. It was found that 30-day administration of metformin in both doses (35 and 70 mg/kg) improved learning and memory processes in «T-maze test» test (p &lt; 0.05). In addition, administration of metformin in small doses (35 and 70 mg/kg) It contributed to the development of the anxiolytic effect in «Elevated plus-maze» test and «Extrapolation escape task» tests (p &lt; 0.05). It was shown that the administration of metformin (70 mg/kg) improved muscle endurance in «Rotarod» test (p &lt; 0.05) against the background of unchanged glucose levels.</p></sec><sec><title>Conclusion</title><p>Conclusion. The results of the conducted studies determine the direction of further research on the possibility of using metformin in small doses that do not have a hypoglycemic effect for the correction of anxiety and cognitive disorders in pathological conditions of the CNS, including in the process of physiological aging.</p></sec></trans-abstract><kwd-group xml:lang="ru"><kwd>когнитивные функции</kwd><kwd>тревожность</kwd><kwd>мышечная выносливость</kwd><kwd>метформин</kwd><kwd>малые дозы</kwd><kwd>половозрелые крысы</kwd></kwd-group><kwd-group xml:lang="en"><kwd>cognitive functions</kwd><kwd>anxiety</kwd><kwd>muscular endurance</kwd><kwd>metformin</kwd><kwd>low doses</kwd><kwd>rats</kwd></kwd-group><funding-group><funding-statement xml:lang="ru">Работа выполнена при финансовой поддержке Российского научного фонда (проект № 23-25-00333).</funding-statement><funding-statement xml:lang="en">The work was carried out with the financial support of the Russian Science Foundation (project No. 23-25-00333).</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">Хафизова А. 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