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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">vetpatol</journal-id><journal-title-group><journal-title xml:lang="ru">Ветеринарная патология</journal-title><trans-title-group xml:lang="en"><trans-title>Russian Journal of Veterinary Pathology</trans-title></trans-title-group></journal-title-group><issn pub-type="epub">2949-4826</issn><publisher><publisher-name>Don State Technical University</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.23947/2949-4826-2025-24-1-7-14</article-id><article-id custom-type="edn" pub-id-type="custom">CTLKRP</article-id><article-id custom-type="elpub" pub-id-type="custom">vetpatol-2035</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>Патология животных, морфология, физиология, фармакология и токсикология</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>Animal pathology, morphology, physiology, pharmacology and toxicology</subject></subj-group></article-categories><title-group><article-title>Абсолютные значения и массовые коэффициенты внутренних органов относительно массы тела и головного мозга собак породы бигль для использования в доклинических исследованиях</article-title><trans-title-group xml:lang="en"><trans-title>Use of Absolute Weights and Mass Coefficients of Beagle Dog Internal Organs Relative to Body and Brain Weights in Preclinical Studies</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1448-921X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Мазукина</surname><given-names>Е. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Mazukina</surname><given-names>E. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Елизавета Владимировна Мазукина, заместитель руководителя отдела экспериментальной фармакологии и токсикологии</p><p>188663, Ленинградская обл., Всеволожский район, г.п. Кузьмоловский, ул. Заводская, д. 3, к. 245</p></bio><bio xml:lang="en"><p>Elizaveta V. Mazukina, Deputy Head of the Experimental Pharmacology and Toxicology Department</p><p>3–245, Zavodskaya Str., Kuzmolovsky Urban-Type Settlement, Vsevolozhsky District, Leningrad Region, 188663</p></bio><email xlink:type="simple">mazukina.ev@doclinika.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/0000-0002-4668-217X</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Изъюрова</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Izyurova</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Екатерина Александровна Изъюрова, врач-патоморфолог отдела гистологии и патоморфологии</p><p>188663, Ленинградская обл., Всеволожский район, г.п. Кузьмоловский, ул. Заводская, д. 3, к. 245</p></bio><bio xml:lang="en"><p>Ekaterina A. Izyurova, Pathologist of the Histology and Pathomorphology Department</p><p>3–245, Zavodskaya Str., Kuzmolovsky Urban-Type Settlement, Vsevolozhsky District, Leningrad Region, 188663</p></bio><email xlink:type="simple">izyurova.ea@doclinika.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/0000-0002-9846-8335</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Султанова</surname><given-names>К. Т.</given-names></name><name name-style="western" xml:lang="en"><surname>Sultanova</surname><given-names>K. T.</given-names></name></name-alternatives><bio xml:lang="ru"><p>Кира Тимуровна Султанова, кандидат медицинских наук, руководитель отдела экспериментальной фармакологии и токсикологии</p><p>188663, Ленинградская обл., Всеволожский район, г.п. Кузьмоловский, ул. Заводская, д. 3, к. 245</p></bio><bio xml:lang="en"><p>Kira T. Sultanova, Cand.Sci. (Medicine), Head of the Experimental Pharmacology and Toxicology Department</p><p>3–245, Zavodskaya Str., Kuzmolovsky Urban-Type Settlement, Vsevolozhsky District, Leningrad Region, 188663</p></bio><email xlink:type="simple">sultanova.kt@doclinika.ru</email><xref ref-type="aff" rid="aff-1"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>АО «Научно-производственное объединение «ДОМ ФАРМАЦИИ»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Joint Stock Company “Research-and-Manufacturing Company “Home of Pharmacy”</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2025</year></pub-date><pub-date pub-type="epub"><day>20</day><month>03</month><year>2025</year></pub-date><volume>24</volume><issue>1</issue><fpage>7</fpage><lpage>14</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Мазукина Е.В., Изъюрова Е.А., Султанова К.Т., 2025</copyright-statement><copyright-year>2025</copyright-year><copyright-holder xml:lang="ru">Мазукина Е.В., Изъюрова Е.А., Султанова К.Т.</copyright-holder><copyright-holder xml:lang="en">Mazukina E.V., Izyurova E.A., Sultanova K.T.</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.vetpat.ru/jour/article/view/2035">https://www.vetpat.ru/jour/article/view/2035</self-uri><abstract><p>Введение. Оценку токсических свойств новых лекарственных препаратов необходимо проводить с использованием двух видов лабораторных животных, один из которых не должен относиться к грызунам. Собаки используются в качестве второго вида лабораторных животных при проведении доклинических исследований. Анализ массы органов в токсикологических исследованиях является важным показателем для выявления органов-мишеней тестируемых объектов. Существующие научные публикации содержат сведения об абсолютных и относительных массах органов животных возрастом 8–16 месяцев, при этом ни в одной из работ не проведен расчет относительно массы головного мозга. Анализ массы органов относительно массы головного мозга полезен при изменениях нормальной динамики массы тела, поскольку масса головного мозга более стабильна, чем масса тела. Таким образом, нами была поставлена цель — определить абсолютные значения масс и ориентировочные интервалы массовых коэффициентов органов у собак породы бигль относительно массы тела и головного мозга, а также сравнить массовые коэффициенты органов собак, рассчитанные как отношение массы органа к массе тела, с литературными данными.Материалы и методы. Исследование проведено в АО «НПО «ДОМ ФАРМАЦИИ» (Ленинградская область) в 2022 г. Для расчета ориентировочных интервалов были использованы данные животных контрольных групп различных экспериментов, полученные от 25 самцов и 17 самок возрастом от 14 до 22 месяцев. Регистрацию масс органов осуществляли на электронных весах. Статистические выбросы не оценивали, поскольку количество животных было небольшим, и предпочли непараметрический метод расчета интервалов. Для создания ориентировочных интервалов были проанализированы абсолютные значения массы органов и коэффициенты, рассчитанные относительно массы тела и головного мозга. Для последующего визуального сравнения собственных полученных данных с литературными осуществляли расчет среднего значения и стандартного отклонения в программе Statistica 10.Результаты исследования. Установлены абсолютные значения масс и ориентировочные интервалы массовых коэффициентов сердца, легких с трахеей, тимуса, печени, селезенки, почек, надпочечников, головного мозга, семенников и яичников относительно массы тела и массы головного мозга собак породы бигль возрастом от 14 до 22 месяцев. При сравнении с литературными данными выявлены различия в массе печени самок, что может быть связано с различной степенью обескровливания органа в ходе некропсии. В целом, полученные значения по органам совпали с таковыми в опубликованных работах, за исключением тимуса: поскольку возраст собак, задействованных в нашем исследовании, был выше животных, описанных в литературе, полученное различие подтверждает возрастную инволюцию тимуса.Обсуждение и заключение. Наличие внутрилабораторных интервалов позволяет корректно интерпретировать полученные результаты измерений масс органов, избегая ложноположительных и ложноотрицательных результатов. Дальнейшие исследования в этой области позволят уменьшить разброс данных, что, в свою очередь, улучшит качество, надёжность и воспроизводимость научных результатов. Кроме того, в будущем это может привести к уменьшению количества животных, используемых в экспериментах.</p></abstract><trans-abstract xml:lang="en"><p>Introduction. Toxicity of new drugs should be evaluated in two species of laboratory animals, one of them being nonrodent species. In preclinical studies, dogs are used as second laboratory animal species. In toxicological research, analysis of organ weights is an important parameter to detect the target organs in test animals. Data on organ absolute and relative weights in animals aged 8–16 months are available in the existing scientific publications, however, none of these papers provide calculations relative to the weight of brain. The analysis of organ weights relative to the weight of brain is useful when changes in the normal dynamics of body weight are observed, since weight of a brain is more stable than weight of a body. Therefore, the objective of the present research is to determine absolute weights and reference intervals of mass coefficients of beagle dog organs relative to body and brain weights, and to compare the mass coefficients of dog organs, which have been calculated as a proportion of organ to body weight, to the data available in the literature.Materials and Methods. The study was conducted at the “Home of Pharmacy” (Leningrad Region) in 2022. To calculate the reference intervals, the data on 25 males and 17 females aged 14–22 months that participated in control groups of various experiments were used. The electronic scales were used to record organ weights. The statistical outliers were not evaluated, since the number of animals was small. A nonparametric method was chosen for calculating intervals. To create the reference intervals, the absolute organ weights and coefficients calculated relative to body and brain weights were analysed. For further visual comparison of data retrieved by the authors to that available in the literature, the mean value and standard deviation were calculated in the Statistica 10 software.Results. Absolute weights and reference intervals of mass coefficients of the heart, lungs with trachea, thymus, liver, spleen, kidneys, adrenal glands, brain, testes and ovaries were established relative to body and brain weights of beagle dogs aged 14 to 22 months. When compared to the data available in literature, discrepancies in liver weights of females were revealed, which may be caused by the different degree of organ exsanguination during necropsy. On the whole, the values obtained for the organs coincided with that in the publications, with the exception of thymus: since the dogs in the present research were older than animals described in the literature, the obtained discrepancy confirms the age-related involution of thymus.Discussion and Conclusion. Availability of internal laboratory reference intervals enables correct interpretation of the obtained results of organ weight measurements, thus, prevents the false positive and false negative results. Further research in this area will reduce data scattering, which in turn will enhance the quality, reliability and reproducibility of scientific results. Moreover, in the future, this may result in reduction of the number of animals used in experiments.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>собаки породы бигль</kwd><kwd>масса органов</kwd><kwd>массовые коэффициенты органов</kwd><kwd>токсикологические исследования</kwd><kwd>доклинические исследования</kwd></kwd-group><kwd-group xml:lang="en"><kwd>beagle dogs</kwd><kwd>organ weights</kwd><kwd>mass coefficients of organs</kwd><kwd>toxicological research</kwd><kwd>preclinical studies</kwd></kwd-group></article-meta></front><back><ref-list><title>References</title><ref id="cit1"><label>1</label><citation-alternatives><mixed-citation xml:lang="ru">Миронов А.Н. Руководство по проведению доклинических исследований лекарственных средств. Часть первая. Москва: Гриф и К; 2012. 944 с. 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