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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">ivm</journal-id><journal-title-group><journal-title xml:lang="ru">Международный вестник ветеринарии</journal-title><trans-title-group xml:lang="en"><trans-title>International Journal of Veterinary Medicine</trans-title></trans-title-group></journal-title-group><issn pub-type="ppub">2072-2419</issn><publisher><publisher-name>SpbGUVM Publishing House</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="doi">10.52419/issn2072-2419.2023.3.102</article-id><article-id custom-type="elpub" pub-id-type="custom">ivm-1116</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>ФАРМАКОЛОГИЯ, ТОКСИКОЛОГИЯ, ФАРМАЦИЯ</subject></subj-group><subj-group subj-group-type="section-heading" xml:lang="en"><subject>PHARMACOLOGY, TOXICOLOGY, PHARMACY</subject></subj-group></article-categories><title-group><article-title>Морфофункциональное состояние щитовидной железы у крыс при длительном низкодозовом воздействии дельтаметрина</article-title><trans-title-group xml:lang="en"><trans-title>Morphofunctional state of the thyroid gland in rats with prolonged low-dose exposure to deltamethrin</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0844-4090</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Чигринский</surname><given-names>Е. А.</given-names></name><name name-style="western" xml:lang="en"><surname>Chigrinsky</surname><given-names>E. A.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к. биол. н., доц. кафедры биохимии, доцент</p></bio><bio xml:lang="en"><p>Candidate of Biology, Associate Professor of the Department of Biochemistry, Associate Professor</p></bio><email xlink:type="simple">chigrinski@list.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/0000-0003-0835-9352</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Герунова</surname><given-names>Л. К.</given-names></name><name name-style="western" xml:lang="en"><surname>Gerunova</surname><given-names>L. K.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р. вет. н, проф. кафедры диагностики, внутренних незаразных болезней, фармакологии, хирургии и акушерства, проф.</p></bio><bio xml:lang="en"><p>Doctor of Veterinary Medicine, Professor of the Department of Diagnostics, Internal Non -infectious Diseases, Pharmacology, Surgery and Obstetrics, Professor</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-5594-2666</contrib-id><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Герунов</surname><given-names>Т. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Gerunov</surname><given-names>T. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>д-р. биол. н., заместитель директора по науке, доц.</p></bio><bio xml:lang="en"><p>D.biol.N., Deputy Director for Science, Associate Professor</p></bio><xref ref-type="aff" rid="aff-2"/></contrib><contrib contrib-type="author" corresp="yes"><name-alternatives><name name-style="eastern" xml:lang="ru"><surname>Шорин</surname><given-names>Н. В.</given-names></name><name name-style="western" xml:lang="en"><surname>Shorin</surname><given-names>N. V.</given-names></name></name-alternatives><bio xml:lang="ru"><p>к. с.-х. н., доц. кафедры садоводства, лесного хозяйства и защиты растений, доц.</p></bio><bio xml:lang="en"><p>Candidate of Agricultural Sciences, Associate Professor of the Department of Horticulture, Forestry and Plant Protection, Associate Professor</p></bio><xref ref-type="aff" rid="aff-2"/></contrib></contrib-group><aff-alternatives id="aff-1"><aff xml:lang="ru"><institution>ФГБОУ ВО «Омский государственный медицинский университет»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Omsk State Medical University</institution><country>Russian Federation</country></aff></aff-alternatives><aff-alternatives id="aff-2"><aff xml:lang="ru"><institution>ФГБОУ ВО «Омский государственный аграрный университет им. П.А. Столыпина»</institution><country>Россия</country></aff><aff xml:lang="en"><institution>Omsk State Agrarian University named after P.A. Stolypin</institution><country>Russian Federation</country></aff></aff-alternatives><pub-date pub-type="collection"><year>2023</year></pub-date><pub-date pub-type="epub"><day>10</day><month>10</month><year>2023</year></pub-date><volume>0</volume><issue>3</issue><fpage>102</fpage><lpage>107</lpage><permissions><copyright-statement>Copyright &amp;#x00A9; Чигринский Е.А., Герунова Л.К., Герунов Т.В., Шорин Н.В., 2023</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="ru">Чигринский Е.А., Герунова Л.К., Герунов Т.В., Шорин Н.В.</copyright-holder><copyright-holder xml:lang="en">Chigrinsky E.A., Gerunova L.K., Gerunov T.V., Shorin N.V.</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://vetjournal.spbguvm.ru/jour/article/view/1116">https://vetjournal.spbguvm.ru/jour/article/view/1116</self-uri><abstract><p>Щитовидная железа весьма чувствительна к действию различных стрессфакторов, в том числе химических. При этом действие многих экотоксикантов на эндокринную систему животных не изучено. Остается открытым вопрос о влиянии циансодержащих синтетических пиретроидов на синтез и секрецию тиреоидных гормонов при длительном низкодозовом воздействии. Цель данной работы – оценка морфофункционального состояния щитовидной железы у лабораторных крыс при указанном режиме воздействия. Исследования проведены на 48 крысах-самцах линии Вистар. При моделировании влияния на животных низких доз дельтаметрин вводили крысам в дозе 1/100 ЛД50, а длительность эксперимента составляла 120 суток. В крови экспериментальных животных определяли концентрацию тиреотропного гормона, общего тироксина (Т4), трийодтиронина (Т3), а также отношение Т4/ Т3. Для определения гормонов использовали метод твердофазного иммуноферментного анализа. Для гистологического исследования щитовидную железу животных фиксировали в 4%-ном нейтральном растворе формальдегида. Срезы с парафиновых блоков окрашивали гематоксилином и эозином. При длительном низкодозовом воздействии дельтаметрина развивается гипофункция щитовидной железы у лабораторных крыс, что сопровождается снижением уровня тиреоидных гормонов в сыворотке крови. Компенсаторно возрастает стимулирующее действие гипофиза за счет дополнительного выброса тиреотропного гормона. При этом в крови отмечается изменение соотношения Т4/Т3. Гистологическая картина щитовидной железы характеризуется уменьшением площади тироцитов, увеличением фолликулов и уплотнением коллоида.</p></abstract><trans-abstract xml:lang="en"><p>The thyroid gland is very sensitive to various stress factors, including chemical ones. Meanwhile, the effect that many ecotoxicants have on the animal endocrine system has not been studied. The effect of cyanide-containing synthetic pyrethroids on the synthesis and secretion of thyroid hormones during prolonged low-dose exposure remains an open question. This research was aimed at assessing the morphofunctional state of the thyroid gland in laboratory rats under the specified exposure regime. The studies were conducted on 48 male Wistar rats. When modeling the effect of low doses of deltamethrin on animals, the substance was administered to rats at a dose of 1/100 LD50, and the experiment lasted for 120 days. The concentrations of thyroid-stimulating hormone, total thyroxine (T4), triiodothyronine (T3), and the ratio T4/T3 were determined in the rats' blood. The solid-phase enzyme immunoassay method was used to determine hormones. For histological examination, the thyroid gland of animals was fixed in a 4% neutral formaldehyde solution. Sections of paraffin blocks were stained with hematoxylin and eosin. Prolonged low-dose exposure to deltamethrin caused hypofunction of the thyroid gland in laboratory rats, which was accompanied by a decrease in the level of thyroid hormones in the blood serum. The stimulating effect of the pituitary gland increased compensatorily due to the additional release of thyroid-stimulating hormone. At the same time, there was a change in the ratio of T4/T3 in the blood. The histological patterns of the thyroid gland were characterized by a decrease in the thyrocyte area, growth of follicles, and colloid densification.</p></trans-abstract><kwd-group xml:lang="ru"><kwd>синтетические пиретроиды</kwd><kwd>дельтаметрин</kwd><kwd>щитовидная железа</kwd><kwd>тиреоидные гормоны</kwd><kwd>тиреотропный гормон</kwd></kwd-group><kwd-group xml:lang="en"><kwd>synthetic pyrethroids</kwd><kwd>deltamethrin</kwd><kwd>thyroid gland</kwd><kwd>thyroid hormones</kwd><kwd>thyroid-stimulating hormone</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">Gardner, D. G. Greenspan's Basic &amp; Clinical Endocrinology / D. G. Gardner, D. 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