<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE root>
<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">19929</article-id><article-id pub-id-type="doi">10.22363/2312-797X-2023-18-3-411-417</article-id><article-id pub-id-type="edn">RIMTJB</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">Efficacy of COP-based protocol used with raltegravir in treatment of cats with mediastinal lymphoma and progressive viral leukemia</article-title><trans-title-group xml:lang="ru"><trans-title>Эффективность COP-протокола при средостенной лимфоме у кошек с прогрессивной вирусной лейкемией, принимавших ралтегравир</trans-title></trans-title-group></title-group><contrib-group><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0002-8605-5103</contrib-id><name-alternatives><name xml:lang="en"><surname>Zenchenkova</surname><given-names>Anna P.</given-names></name><name xml:lang="ru"><surname>Зенченкова</surname><given-names>Анна Петровна</given-names></name></name-alternatives><bio xml:lang="en"><p>veterinary infectious disease specialist</p></bio><bio xml:lang="ru"><p>ветеринарный врач-инфекционист</p></bio><email>a.zenchenkova@vetlebedi.ru</email><xref ref-type="aff" rid="aff1"/></contrib><contrib contrib-type="author"><contrib-id contrib-id-type="orcid">https://orcid.org/0000-0003-3820-0086</contrib-id><name-alternatives><name xml:lang="en"><surname>Vatnikov</surname><given-names>Yury A.</given-names></name><name xml:lang="ru"><surname>Ватников</surname><given-names>Юрий Анатольевич</given-names></name></name-alternatives><bio xml:lang="en"><p>Doctor of Veterinary Sciences, Professor, Director of the Department of Veterinary Medicine</p></bio><bio xml:lang="ru"><p>доктор ветеринарных наук, профессор, директор департамента ветеринарной медицины</p></bio><email>vatnikov-yua@rudn.ru</email><xref ref-type="aff" rid="aff2"/></contrib></contrib-group><aff-alternatives id="aff1"><aff><institution xml:lang="en">Veterinary Center ‘Lebedi’</institution></aff><aff><institution xml:lang="ru">ООО КВМ «Лебеди»</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><pub-date date-type="pub" iso-8601-date="2023-09-28" publication-format="electronic"><day>28</day><month>09</month><year>2023</year></pub-date><volume>18</volume><issue>3</issue><issue-title xml:lang="en">VOL 18, NO3 (2023)</issue-title><issue-title xml:lang="ru">ТОМ 18, №3 (2023)</issue-title><fpage>411</fpage><lpage>417</lpage><history><date date-type="received" iso-8601-date="2023-09-28"><day>28</day><month>09</month><year>2023</year></date></history><permissions><copyright-statement xml:lang="en">Copyright ©; 2023, Zenchenkova A.P., Vatnikov Y.A.</copyright-statement><copyright-statement xml:lang="ru">Copyright ©; 2023, Зенченкова А.П., Ватников Ю.А.</copyright-statement><copyright-year>2023</copyright-year><copyright-holder xml:lang="en">Zenchenkova A.P., Vatnikov Y.A.</copyright-holder><copyright-holder xml:lang="ru">Зенченкова А.П., Ватников Ю.А.</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/19929">https://agrojournal.rudn.ru/agronomy/article/view/19929</self-uri><abstract xml:lang="en"><p style="text-align: justify;">Mediastinal lymphoma is a common disease in both human and veterinary medicine and is frequently diagnosed in cats infected with feline leukemia virus. The disease is considered a negative prognostic factor for affected animals. The retrospective research included 5 FeLV-positive cats with confirmed mediastinal lymphoma and progressive viral leukemia. The purpose was to study the response of FeLV-positive cats to standard chemotherapy protocol: cyclophosphamide 250 mg/m<sup>2</sup> IV, vincristine 0.5 mg/m<sup>2</sup> IV, prednisolone 20…40 mg/m<sup>2</sup> orally (COP), survival of animals and side effects associated with chemotherapeutic treatment. All studied cats received raltegravir (Isentress, MSD, USA) orally at a dose of 20 mg/kg every 12 hours. Improvement in clinical signs associated with mediastinal lymphoma was observed after the 3rd course of chemotherapy. The clinical response rate was 80 % (40 % full remission, 40 % partial remission, 20 % unchanged status). The average lifespan of FeLV-positive cats treated with chemotherapy for mediastinal lymphoma was 1091.2 days, with a maximum lifespan of 1364 days and a minimum lifespan of 775 days. Rate of clinical response, as well as lifespan expectancy of affected cats, was higher than in previous studies. This is probably due to raltegravir, which can reduce the viral load and thus control the course of progressive infection. Side effects were found in 100 % of FeLV-positive cats: with anorexia — in two animals (60 %), vomiting — in two (40 %), neutropenia — in four (80 %), thrombocytopenia — in all cats (100 %), anemia — in three (60 %) and azotemia — in one animal (20 %). Overall, the efficacy of the COP protocol was satisfactory, and chemotherapy treatment can be offered to owners of FeLV-positive cats with mediastinal lymphoma, if the owner is reluctant to opt for euthanasia of the affected animal.</p></abstract><trans-abstract xml:lang="ru"><p style="text-align: justify;">Лимфома средостения — часто встречающееся заболевание как в гуманитарной, так и ветеринарной медицине, при этом данное заболевание часто диагностируют в популяции кошек, больных вирусной лейкемией (ЛК). Наличие вируса лейкемии кошек (ВЛК) считается негативным прогностическим фактором для больных животных. Цель ретроспективного исследования, включавшего 5 ВЛК-положительных кошек с подтвержденной средостенной лимфомой и прогрессивной формой вирусной ЛК, — изучение ответа ВЛК-положительных кошек на стандартный химиотерапевтический протокол: циклофосфамид 250 мг/м<sup>2</sup> в/в, винкристин 0,5 мг/м<sup>2</sup> в/в, преднизолон 20…40 мг/м<sup>2</sup> п/о (COP), продолжительности жизни животных и побочных эффектов, связанных с химиотерапевтическим лечением. Все исследуемые кошки получали ралтегравир («Исентресс», MSD, США) п/о в дозе 20 мг/кг каждые 12 ч. Улучшение клинических признаков, ассоциированных со средостенной лимфомой, наблюдали после 3‑го курса химиотерапии. Уровень клинического ответа составил 80 % (40 % — полная ремиссия, 40 % — частичный ответ, 20 % — отсутствие положительной динамики). Средняя продолжительность жизни ВЛК-положительных кошек, получавших химиотерапевтическое лечение против средостенной лимфомы, составила 1091,2 день, максимальная продолжительность жизни — 1364 дня, минимальная — 775 дней. Уровень клинического ответа, а также продолжительность жизни больных кошек оказались выше, чем в предыдущих исследованиях. Вероятно, это связано с приемом ралтегравира, способного снизить вирусную нагрузку при вирусной ЛК и таким образом контролировать течение прогрессивной инфекции. Побочные эффекты были обнаружены у 100 % ВЛК-положительных кошек, при этом анорексия — у двух (60 %), рвота — у двух (40 %), нейтропения — у четырех (80 %), тромбоцитопения — у всех кошек (100 %), анемия — у трех (60 %) и азотемия — у одной (20 %). В целом эффективность COP-протокола была удовлетворительной, что позволяет ветеринарным специалистам предлагать химиотерапевтическое лечение владельцам ВЛК-положительных кошек, больных средостенной лимфомой, если владелец не склонен выбирать эвтаназию больного животного.</p></trans-abstract><kwd-group xml:lang="en"><kwd>oncology</kwd><kwd>leukemia</kwd><kwd>antiretroviral therapy</kwd><kwd>chemotherapy</kwd><kwd>anemia</kwd><kwd>small pets</kwd></kwd-group><kwd-group xml:lang="ru"><kwd>онкология</kwd><kwd>лейкоз</kwd><kwd>антиретровирусная терапия</kwd><kwd>химиотерапия</kwd><kwd>анемия</kwd><kwd>мелкие домашние животные</kwd></kwd-group><funding-group/></article-meta></front><body></body><back><ref-list><ref id="B1"><label>1.</label><mixed-citation>Economu L, Stell A, O’Neill DG, Schofield I, Stevens K, Brodbelt D. Incidence and risk factors for feline lymphoma in UK primary-care practice. Journal of Small Animal Practice. 2021;62(2):97-106. doi: 10.1111/jsap.13266</mixed-citation></ref><ref id="B2"><label>2.</label><mixed-citation>Sato H, Fujino Y, Chino J, Takahashi M, Fukushima K, Goto-­Koshino Y, et al. Prognostic analyses on anatomical and morphological classification of feline lymphoma. Journal of Veterinary Medical Science. 2014;76(6):807-811. doi: 10.1292/jvms.13-0260</mixed-citation></ref><ref id="B3"><label>3.</label><mixed-citation>Fabrizio F, Calam AE, Dobson JM, Middleton SA, Murphy S, Taylor SS, et al. Feline mediastinal lymphoma: A retrospective study of signalment, retroviral status, response to chemotherapy and prognostic indicators. Journal of Feline Medicine and Surgery. 2014;16(8):637-644. doi: 10.1177/1098612X13516621</mixed-citation></ref><ref id="B4"><label>4.</label><mixed-citation>Limmer S, Eberle N, Nerschbach V, Nolte I, Betz D. Treatment of feline lymphoma using a 12-week, maintenance-free combination chemotherapy protocol in 26 cats. Veterinary and Comparative Oncololy. 2016;14(51):21-31. doi: 10.1111/vco.12082</mixed-citation></ref><ref id="B5"><label>5.</label><mixed-citation>Couto CG. Advances in the treatment of the cat with lymphoma in practice. Journal of Feline Medicine and Surgery. 2000;2(2):95-100. doi: 10.1053/jfms.2000.007</mixed-citation></ref><ref id="B6"><label>6.</label><mixed-citation>Crouse Z, Phillips B, Flory A, Mahoney J, Richter K, Kidd L. Post-chemotherapy perforation in cats with discrete intermediate- or large-cell gastrointestinal lymphoma. Journal of Feline Medicine and Surgery. 2018;20(8):696-703. doi: 10.1177/1098612X1772377</mixed-citation></ref><ref id="B7"><label>7.</label><mixed-citation>Hofmann-­Lehmann R, Hartmann K. Feline leukaemia virus infection: A practical approach to diagnosis. Journal of Feline Medicine and Surgery. 2020;22(9):831-846. doi: 10.1177/1098612X209417</mixed-citation></ref><ref id="B8"><label>8.</label><mixed-citation>Santos CRGR, Ferreira IT, Beranger R, Santi JP, Jardim MPB, de Souza HJM. Undetectable proviral DNA and viral RNA levels after raltegravir administration in two cats with natural feline leukemia virus infection. Brazilian Journal of Veterinary Medicine. 2022;44: e003522. doi: 10.29374/2527-2179.bjvm003522</mixed-citation></ref><ref id="B9"><label>9.</label><mixed-citation>Hartmann K, Hofmann-­Lehmann R. What’s New in Feline Leukemia Virus Infection. The Veterinary Clinics of North America: Small Animal Practice. 2020;50(5):1013-1036. doi: 10.1016/j.cvsm.2020.05.006</mixed-citation></ref><ref id="B10"><label>10.</label><mixed-citation>Finotello R, Vasconi ME, Sabattini S, Agnoli C, Giacoboni C, Annoni M, et al. Feline large granular lymphocyte lymphoma: An Italian Society of Veterinary Oncology (SIONCOV) retrospective study. Veterinary and Comparative Oncology. 2018;16(1):159-166. doi: 10.1111/vco.12325</mixed-citation></ref><ref id="B11"><label>11.</label><mixed-citation>Teske E, van Straten G, van Noort R, Rutteman GR. Chemotherapy with cyclophosphamide, vincristine, and prednisolone (COP) in cats with malignant lymphoma: new results with an old protocol. Journal of Veterinary Internal Medicine. 2002;16(20):179-186. doi: 10.1111/j.1939-1676.2002.tb02352.x</mixed-citation></ref><ref id="B12"><label>12.</label><mixed-citation>Boesch A, Cattori V, Riond B, Willi B, Meli ML, Rentsch KM, et al. Evaluation of the effect of short-term treatment with the integrase inhibitor raltegravir (Isentress) on the course of progressive feline leukemia virus infection. Veterinary Microbiology. 2015;175(2-4):167-178. doi: 10.1016/j.vetmic.2014.10.031</mixed-citation></ref><ref id="B13"><label>13.</label><mixed-citation>Jaroensong T, Piamwaree J, Sattasathuchana P. Effects of Chemotherapy on Hematological Parameters and CD4+/CD8+ Ratio in Cats with Mediastinal Lymphoma and Seropositive to Feline Leukemia Virus. Animals. 2022;12(3):223. doi: 10.3390/ani12030223</mixed-citation></ref><ref id="B14"><label>14.</label><mixed-citation>Ferro L, Ciccarelli S, Stanzani G, Nappi L, Angelini F, Leo C. Appetite Stimulant and Anti-­Emetic Effect of Mirtazapine Transdermal Ointment in Cats Affected by Lymphoma Following Chemotherapy Administration: A Multi-­Centre Retrospective Study. Animals. 2022;12(3):155. doi: 10.3390/ani12020155</mixed-citation></ref><ref id="B15"><label>15.</label><mixed-citation>Musser ML, Curran KM, Flesner BK, Johannes CM. A Retrospective Evaluation of Chemotherapy Overdoses in Dogs and Cats. Frontiers in Veterinary Science. 2021;8:245-231. doi: 10.3389/fvets.2021.718967</mixed-citation></ref></ref-list></back></article>
