Palliative jaw-sparing treatment of a non-resectable canine oral fibrosarcoma using combination of electrochemotherapy with bleomycin and IL-12 gene electrotransfer

Pavlin, Darja (author), Nemec, Ana (author), Lampreht Tratar, Urša (author), Čemažar, Maja (author), Brožič, Andreja (author), Serša, Gregor (author), Tozon, Nataša (author)

Abstract: A 15-year-old male castrated English setter was presented for evaluation of a rapidly growing oral mass. Patient’s history was otherwise unremarkable, except of moderate proteinuria of 5 years duration. Clinical examination findings were within normal limits, except of an ulcerated located at the left mandibular canine tooth, which was histologically confirmed as a high grade infiltrative fibrosarcoma with high mitotic index (61/10 HPF) and multifocal necrotic areas. The client declined full staging, so only hematological and biochemistry examinations of blood were performed, which were without any clinically significant alterations. Furthermore a fine needle aspiration biopsy of regional lymph nodes was performed, which revealed reactive lymphadenopathy without signs of metastases. After declining other more invasive therapeutic procedures, the clients elected treatment with combination of electrochemotherapy and IL-12 electrogene therapy. Four consecutive treatment sessions were performed, resulting not only in complete response of the primary tumor, but also in regression of untreated distant metastasis, which was diagnosed approximately one month after the initial examination. Furthermore, the percentage of circulating CD8+ cells was increased after each therapy session, indicating possible systemic induction of immune response by IL-12 gene therapy. This case shows that this type of therapy can represent an alternative type of both local and systemic treatment in selected tumor cases, where clients seek a less invasive nonsurgical treatment.

• Language: English
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: VF - Veterinary Faculty; MF - Faculty of Medicine
• Publication status: Published
• Publication version: Version of Record
• Submitted for review: 16.07.2020
• Article acceptance date: 26.08.2020
• Publication date: 10.03.2021
• Year: 2021
• Number of pages: Str. 35-41
• Numbering: Vol. 58, no. 1
• PID: 20.500.12556/RUL-132071
• UDC: 602.621:616.31-006:615:636.7
• ISSN on article: 1580-4003
• DOI: 10.26873/SVR-1148-2020
• COBISS.SI-ID: 58436867
• Publication date in RUL: 11.10.2021

Record is a part of a journal

• Title: Slovenian veterinary research. ǂthe ǂscientific journal of the Veterinary Faculty University of Ljubljana
• Shortened title: Slov. vet. res.
• Publisher: Veterinarska fakulteta, Veterinarska fakulteta, Založba Univerze v Ljubljani
• ISSN: 1580-4003
• COBISS.SI-ID: 108028416

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.
• Licensing start date: 10.03.2021

Secondary language

• Language: Slovenian
• Title: Paliativno zdravljenje neresektabilnega fibrosarkoma spodnje čeljusti pri psu s kombinacijo elektrokemoterapije z bleomicinom in genskega elektroprenosa IL-12

Abstract

Izvleček: Petnajstleni kastrirani angleški seter je bil na našo kliniko sprejet z namenom pregleda hitro rastoče novotvorbe v ustni votlini. Pes ni imel pomembnejših sočasnih bolezni, razen zmerne proteinurije zadnjih pet let. Fizikalni pregled ni pokazal nikakršnih odstopanj z izjemo ulcerirane novotvorbe na področju levega mandibularnega grabilca. Histološka diagnoza novotvorbe je bila infiltrativni fibrosarkom visoke stopnje z visokim mitotičnim indeksom (61/10 v polju visoke povečave) in multifokalnimi nekrotičnimi področji. Skrbnik psa je zavrnil popolno določitev stadija bolezni, zato smo izvedli le osnovne hematološke in biokemijske preisakve, ki niso pokazale pomembnejših odstopanj. Izvedli smo tudi tankoligelno biopsijo regionalnih bezgavk, ki je pokazala reaktivno limfadenopatijo brez znakov prisotnosti zasevkov. Po predstavitvi vseh možnosti zdravljenja se je lastnik odločil za zdravljenje s kombinacijo elektrokemoterapije in genskega elektroprenosa IL-12. Izvedli smo štiri zaporedne cikluse kombinirane terapije, s katero smo dosegli ne le popolni odgovor primarnega tumorja, pač pa tudi regresijo nezdravljenih oddaljenih podkožnih metastaz, ki so se pojavile približno mesec dni po začetku terapije. Poleg tega smo po vsaki terapiji ugotovili povečan delež cirkulirajočih CD8+ celic, kar lahko nakazuje na to, da je genska terapija z IL-12 sprožila sistemski imunski odziv. Predstavljeni primer kaže, da lahko kombinacija elektrokemoterapije in genskega elektroprenosa IL-12 predstavlja alternativno obliko tako lokalnega kot sistemskega zdravljenja določenih novotvorb, zlasti v primerih, ko skrbnik živali želi manj invazivne terapevtske postopke.