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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">Epidemiology and Infectious Diseases</journal-id><journal-title-group><journal-title xml:lang="en">Epidemiology and Infectious Diseases</journal-title><trans-title-group xml:lang="ru"><trans-title>Эпидемиология и инфекционные болезни</trans-title></trans-title-group></journal-title-group><issn publication-format="print">3034-2007</issn><issn publication-format="electronic">3034-2015</issn><publisher><publisher-name xml:lang="en">Eco-Vector</publisher-name></publisher></journal-meta><article-meta><article-id pub-id-type="publisher-id">108910</article-id><article-id pub-id-type="doi">10.17816/EID108910</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>Research Article</subject></subj-group></article-categories><title-group><article-title xml:lang="en">Toxicity profile of the new compound XC221GI from pre-clinical studies</article-title><trans-title-group xml:lang="ru"><trans-title>Доклиническое исследование токсикологического профиля нового соединения XC221GI</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-0548-4249</contrib-id><name-alternatives><name xml:lang="en"><surname>Suhanova</surname><given-names>Svetlana A.</given-names></name><name xml:lang="ru"><surname>Суханова</surname><given-names>Светлана Алексеевна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.)</p></bio><bio xml:lang="ru"><p>к.б.н.</p></bio><email>ssuhanova46@gmail.com</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5718-3301</contrib-id><name-alternatives><name xml:lang="en"><surname>Proskurina</surname><given-names>Oksana V.</given-names></name><name xml:lang="ru"><surname>Проскурина</surname><given-names>Оксана Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>MD, Cand. Sci. (Med.)</p></bio><bio xml:lang="ru"><p>к.м.н.</p></bio><email>proskurina_ov@mail.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0283-8598</contrib-id><name-alternatives><name xml:lang="en"><surname>Jain</surname><given-names>Ekaterina A.</given-names></name><name xml:lang="ru"><surname>Джайн</surname><given-names>Екатерина Александровна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Head of Preclinical research group, JSC Valenta Pharm pharmaceutical company</p></bio><bio xml:lang="ru"><p>руководитель группы доклинических исследований АО «Валента Фарм»</p></bio><email>ekaterina.korsakova@valentapharm.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-9295-2663</contrib-id><name-alternatives><name xml:lang="en"><surname>Globenko</surname><given-names>Aleksander A.</given-names></name><name xml:lang="ru"><surname>Глобенко</surname><given-names>Александр Александрович</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Medical director</p></bio><bio xml:lang="ru"><p>медицинский директор</p></bio><email>Aleksandr.Globenko@valentapharm.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-4577-1832</contrib-id><name-alternatives><name xml:lang="en"><surname>Bagaeva</surname><given-names>Madina I.</given-names></name><name xml:lang="ru"><surname>Багаева</surname><given-names>Мадина Ибрагимовна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Medical advisor</p></bio><bio xml:lang="ru"><p>медицинский советник</p></bio><email>madina.bagaeva@valentapharm.com</email><xref ref-type="aff" rid="aff2"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-0241-156X</contrib-id><name-alternatives><name xml:lang="en"><surname>Rydlovskaya</surname><given-names>Anastasia V.</given-names></name><name xml:lang="ru"><surname>Рыдловская</surname><given-names>Анастасия Владимировна</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Biol.)</p></bio><bio xml:lang="ru"><p>к.б.н.</p></bio><email>rydlovskaya@pharmenterprises.ru</email><xref ref-type="aff" rid="aff3"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0001-5939-9341</contrib-id><name-alternatives><name xml:lang="en"><surname>Nebolsin</surname><given-names>Vladimir E.</given-names></name><name xml:lang="ru"><surname>Небольсин</surname><given-names>Владимир Евгеньевич</given-names></name></name-alternatives><address><country country="RU">Russian Federation</country></address><bio xml:lang="en"><p>Cand. Sci. (Chem.)</p></bio><bio xml:lang="ru"><p>к.х.м.</p></bio><email>nv@pharmenterprises.ru</email><xref ref-type="aff" rid="aff3"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">All-Union Scientific Center for the Safety of Biologically Active Substances</institution></aff><aff><institution xml:lang="ru">Всесоюзный научный центр по безопасности биологически активных веществ</institution></aff></aff-alternatives><aff-alternatives id="aff2"><aff><institution xml:lang="en">Valenta Pharm Pharmaceutical Company</institution></aff><aff><institution xml:lang="ru">Валента Фарм</institution></aff></aff-alternatives><aff-alternatives id="aff3"><aff><institution xml:lang="en">Farminterprayses</institution></aff><aff><institution xml:lang="ru">Фарминтерпрайсез</institution></aff></aff-alternatives><pub-date date-type="preprint" iso-8601-date="2022-08-11" publication-format="electronic"><day>11</day><month>08</month><year>2022</year></pub-date><pub-date date-type="pub" iso-8601-date="2022-08-19" publication-format="electronic"><day>19</day><month>08</month><year>2022</year></pub-date><volume>26</volume><issue>5</issue><issue-title xml:lang="en"/><issue-title xml:lang="ru"/><fpage>200</fpage><lpage>213</lpage><history><date date-type="received" iso-8601-date="2022-06-30"><day>30</day><month>06</month><year>2022</year></date><date date-type="accepted" iso-8601-date="2022-07-06"><day>06</day><month>07</month><year>2022</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2022, Eco-vector</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2022, ООО "Эко-вектор"</copyright-statement><copyright-year>2022</copyright-year><copyright-holder xml:lang="en">Eco-vector</copyright-holder><copyright-holder xml:lang="ru">ООО "Эко-вектор"</copyright-holder><ali:free_to_read xmlns:ali="http://www.niso.org/schemas/ali/1.0/" start_date="2025-08-19"/></permissions><self-uri xlink:href="https://rjeid.com/1560-9529/article/view/108910">https://rjeid.com/1560-9529/article/view/108910</self-uri><abstract xml:lang="en"><p>The major feature of COVID-19 is intensive virus-induced inflammation in vital body organs and spatiotemporal dysregulation of pro- and anti-inflammatory cytokines and chemokines synthesis. All this leads to unpredicted clinical progression and high risk of "cytokine storm" development. The "cytokine storm" is the pathogenetic basis for further development of life-threatening complications. Thus, there is a huge need to select effective and safe approaches that allow to control virus-induced inflammation as a part of preventive anti-inflammatory therapy.</p> <p>This article presents toxicological characteristics of the original low-molecular compound XC221GI (1-[2-(1-methylimidazole-4-yl)-ethyl]perhydroazin-2,6-dione) from pre-clinical studies.</p> <p>The obtained results demonstrate that the XC221GI does not have any toxic effect in repeated long-term administration. The compound was well tolerated by all animals. The no-observed-adverse-effect level (NOAEL) was 30 mg/kg per day for dogs and 450 mg/kg per day for rats. There were no effects of XC221GI on blood count, hematopoiesis and hemostasis. As well as no cytotoxic, mutagenic, genotoxic, carcinogenic properties or anaphylactogenic and immunotoxic activity were revealed for XC221GI. All known data enable to classify XC221GI as a low toxic compound and consider its safety profile as reasonably favorable.</p></abstract><trans-abstract xml:lang="ru"><p>Ключевой особенностью COVID-19 является интенсивное вирусиндуцированное воспаление в жизненно важных структурах организма и пространственно-временная дисрегуляция синтеза про- и противовоспалительных цитокинов и хемокинов, что выражается непредсказуемостью клинического течения и высоким риском формирования «цитокинового шторма». Состояние «цитокинового шторма» является патогенетической основой развития грозных осложнений, поэтому актуальной задачей ставится подбор эффективных и безопасных схем терапии, позволяющих управлять вирусиндуцированным воспалением в рамках упреждающей противовоспалительной терапии.</p> <p>В работе представлена токсикологическая характеристика оригинального низкомолекулярного соединения ХС221GI (1-[2-(1-метилимидазол-4-ил)-этил] пергидроазин-2,6-дион) по результатам доклинических исследований. Полученные результаты свидетельствуют об отсутствии у ХС221GI токсического действия при многократном длительном применении. Все животные хорошо переносили введение соединения, доза без видимого нежелательного эффекта (NOAEL) составляла 30 мг/кг в сутки для собак и 450 мг/кг в сутки для крыс. Установлено отсутствие влияния ХС221GI на форменные элементы крови, систему кроветворения и гемостаза, отсутствие у соединения цитотоксических, мутагенных, генотоксических и канцерогенных свойств, а также анафилактогенного и иммунотоксического действия.</p> <p>Все известные данные позволяют классифицировать ХС221GI как малотоксичное соединение и считать профиль безопасности нового соединения обоснованно благоприятным.</p></trans-abstract><kwd-group xml:lang="en"><kwd>COVID-19</kwd><kwd>preventive anti-inflammatory therapy</kwd><kwd>ХС221GI</kwd><kwd>toxicology</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>COVID-19</kwd><kwd>упреждающая противовоспалительная терапия</kwd><kwd>ХС221GI</kwd><kwd>токсикология</kwd></kwd-group><funding-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">ООО «Фарминтепрайзес»</institution></institution-wrap><institution-wrap><institution xml:lang="en">Pharmenterprises LLC</institution></institution-wrap></funding-source></award-group><award-group><funding-source><institution-wrap><institution xml:lang="ru">АО «Валента Фарм»</institution></institution-wrap><institution-wrap><institution xml:lang="en">JSC Valenta Pharm</institution></institution-wrap></funding-source></award-group></funding-group></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><citation-alternatives><mixed-citation xml:lang="en">Ruelens M, Wouters J. 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