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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">RUDN Journal of Agronomy and Animal Industries</journal-id><journal-title-group><journal-title xml:lang="en">RUDN Journal of Agronomy and Animal Industries</journal-title><trans-title-group xml:lang="ru"><trans-title>Вестник Российского университета дружбы народов. Серия: Агрономия и животноводство</trans-title></trans-title-group></journal-title-group><issn publication-format="print">2312-797X</issn><issn publication-format="electronic">2312-7988</issn><publisher><publisher-name xml:lang="en">Peoples’ Friendship University of Russia named after Patrice Lumumba</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">20319</article-id><article-id pub-id-type="doi">10.22363/2312-797X-2026-21-1-195-202</article-id><article-id pub-id-type="edn">GGQBZO</article-id><article-categories><subj-group subj-group-type="toc-heading" xml:lang="en"><subject>Veterinary science</subject></subj-group><subj-group subj-group-type="toc-heading" xml:lang="ru"><subject>Ветеринария</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">Analysis of the pharmacological efficacy of methylprednisolone in targeted delivery using biodegradable carriers in animals</article-title><trans-title-group xml:lang="ru"><trans-title>Анализ фармакологической эффективности применения метилпреднизолона у животных при адресной доставке на биодеградируемых носителях</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><name-alternatives><name xml:lang="en"><surname>Bannoud</surname><given-names>Georges</given-names></name><name xml:lang="ru"><surname>Баннуд</surname><given-names>Жорж</given-names></name></name-alternatives><bio xml:lang="en">Veterinarian</bio><bio xml:lang="ru">ветеринарный врач</bio><email>george911@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3484-3949</contrib-id><contrib-id contrib-id-type="spin">3948-5218</contrib-id><name-alternatives><name xml:lang="en"><surname>Ibragimova</surname><given-names>Alfiya N.</given-names></name><name xml:lang="ru"><surname>Ибрагимова</surname><given-names>Альфия Наилевна</given-names></name></name-alternatives><bio xml:lang="en"><p>Candidate of Pharmaceutical Sciences (PhD), Associate Professor, Department of Disaster Medicine, Medical Institute</p></bio><bio xml:lang="ru"><p>кандидат фармацевтических наук, доцент кафедры медицины катастроф медицинского института</p></bio><email>Ibragimova-an@rudn.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-1685-7004</contrib-id><name-alternatives><name xml:lang="en"><surname>Mas-Coma</surname><given-names>Santiago</given-names></name><name xml:lang="ru"><surname>Мас-Кома</surname><given-names>Сантьяго</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Veterinary Sciences, Professor, Director of the Department of Veterinary and Animal Science</p></bio><bio xml:lang="ru"><p>доктор ветеринарных наук, профессор, директор департамента ветеринарии и зоотехнии</p></bio><email>S.Mas.Coma@uv.es</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0009-0003-8230-0153</contrib-id><contrib-id contrib-id-type="spin">9355-7573</contrib-id><name-alternatives><name xml:lang="en"><surname>Troshina</surname><given-names>Natalya I.</given-names></name><name xml:lang="ru"><surname>Трошина</surname><given-names>Наталья Игоревна</given-names></name></name-alternatives><bio xml:lang="en"><p>Senior Lecturer, Department of Veterinary Medicine, Agrarian and Technological Institute</p></bio><bio xml:lang="ru"><p>старший преподаватель департамента ветеринарной медицины аграрно-технологического института</p></bio><email>troshina-ni@rudn.ru</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-2112-673X</contrib-id><contrib-id contrib-id-type="spin">5511-4446</contrib-id><name-alternatives><name xml:lang="en"><surname>Karamyan</surname><given-names>Arfenya S.</given-names></name><name xml:lang="ru"><surname>Карамян</surname><given-names>Арфеня Семеновна</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Biological Sciences, Candidate of Veterinary Sciences (PhD), Associate Professor, Associate Professor of the Department of Veterinary Medicine, Agrarian and Technological Institute</p></bio><bio xml:lang="ru"><p>доктор биологических наук, кандидат ветеринарных наук, доцент, доцент департамента ветеринарной медицины аграрно-технологического института</p></bio><email>karamyan-as@rudn.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Vetlife Veterinary Clinic</institution></aff><aff><institution xml:lang="ru">Ветеринарная клиника «Ветлайф»</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">RUDN University</institution></aff><aff><institution xml:lang="ru">Российский университет дружбы народов</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">University of Valencia</institution></aff><aff><institution xml:lang="ru">Университет Валенисии</institution></aff></aff-alternatives><pub-date date-type="pub" iso-8601-date="2026-05-13" publication-format="electronic"><day>13</day><month>05</month><year>2026</year></pub-date><volume>21</volume><issue>1</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>195</fpage><lpage>202</lpage><history><date date-type="received" iso-8601-date="2026-05-11"><day>11</day><month>05</month><year>2026</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2026, Bannoud G., Ibragimova A.N., Mas-Coma S., Troshina N.I., Karamyan A.S.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2026, Баннуд Ж., Ибрагимова А.Н., Мас-Кома С., Трошина Н.И., Карамян А.С.</copyright-statement><copyright-year>2026</copyright-year><copyright-holder xml:lang="en">Bannoud G., Ibragimova A.N., Mas-Coma S., Troshina N.I., Karamyan A.S.</copyright-holder><copyright-holder xml:lang="ru">Баннуд Ж., Ибрагимова А.Н., Мас-Кома С., Трошина Н.И., Карамян А.С.</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/"/><license><ali:license_ref xmlns:ali="http://www.niso.org/schemas/ali/1.0/">https://creativecommons.org/licenses/by-nc/4.0</ali:license_ref></license></permissions><self-uri xlink:href="https://agrojournal.rudn.ru/agronomy/article/view/20319">https://agrojournal.rudn.ru/agronomy/article/view/20319</self-uri><abstract xml:lang="en"><p>The use of glucocorticosteroids (GCS) in veterinary pharmacotherapy helps reduce inflammation and allergic reactions and has an immunosuppressive effect. Adaptive hormones increase the body’s resistance to stress. The widespread use of GCS in surgical interventions involving implantation is driven by a decreased reaction of surrounding tissues, reduced postoperative edema, and improved implant integration. However, oral administration of GCS is often associated with low bioavailability, and dose escalation carries the risk of severe adverse effects. The development of novel targeted delivery systems using biodegradable carriers makes it possible to increase the bioavailability of drugs, minimize side effects, and enhance the efficacy of pharmacotherapy. When choosing targeted delivery, it is important to assess the quantitative parameters of GCS concentration in blood plasma depending on the route of administration. The developed high-performance liquid chromatography with tandem mass spectrometry (HPLC–MS/MS) method enables the determination of very low drug concentrations within a range of 2 to 1000 ng/mL.</p></abstract><trans-abstract xml:lang="ru"><p>Применение глюкокортикостероидов (ГКС) в фармакотерапии животных позволяет снизить развитие воспаления, аллергических реакций и оказывает иммуносупрессивное действие. Адаптивные гормоны повышают устойчивость организма к стрессу. Широкое использование ГКС при хирургических вмешательствах, сопряженных с имплантацией, продиктовано снижением реакции окружающих тканей, послеоперационного отека, повышением приживаемости имплантов. Однако, пероральное применение ГКС часто сопряжено с низкой биодоступностью, а повышение дозы препаратов чревато тяжелым проявлением побочного действия. Разработка новых систем адресной доставки с использованием биодеградируемых носителей позволяет повысить биодоступность лекарственных средств, снизить побочное действие и повысить эффективность фармакотерапии. Выбирая адресную доставку, важно оценить количественные параметры концентрации ГКС в плазме крови в зависимости от выбранного пути введения. Разработанная методика высокоэффективной жидкостной хроматографии с тандемной масс-спектрометрией (ВЭЖХ–МС/МС) позволяет определить самые низкие концентрации лекарственных средств, диапазон методики от 2 до 1000 нг/мл.</p></trans-abstract><kwd-group xml:lang="en"><kwd>glucocorticosteroids</kwd><kwd>targeted delivery system</kwd><kwd>veterinary medicine</kwd><kwd>pharmacotherapy</kwd><kwd>high-performance liquid chromatography</kwd><kwd>HPLC</kwd><kwd>tandem mass spectrometry</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>глюкокортикостероиды</kwd><kwd>система адресной доставки</kwd><kwd>ветеринария</kwd><kwd>фармакотерапия</kwd><kwd>высокоэффективная жидкостная хроматография</kwd><kwd>ВЭЖХ</kwd><kwd>тандемная масс-спектрометрия</kwd></kwd-group><funding-group/></article-meta><fn-group/></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Gammel IV, Zhukova ОV, Kononova SV, Konnova MA. 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