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      Clinical utility of a life quality score in dogs with canine transmissible venereal tumor treated by vincristine chemotherapy Translated title: Utilidade clínica de escala de qualidade de vida durante o tratamento quimioterápico de cães com tumor venéreo transmissível canino (TVTC) com vincristina

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          Abstract

          The clinical utility of a life quality score during vincristine chemotherapy of dogs with canine transmissible venereal tumor (CTVT) was investigated using 93 tumor-bearing dogs in this prospective study. At diagnosis, clinical data and the performance status were evaluated according to a modified Karnofsky score (CKS) adapted for dogs. The animals were treated with vincristine sulphate (0.025mg/kg) at weekly intervals until the tumor had macroscopically disappeared. The time until the first adverse event and death were recorded. In a pilot study, CKS revealed a high inter-observer concordance (kappa=0.735; weighted kappa=0.835). CKS permitted a detailed monitoring of adverse effects during therapy. Cox regressions showed that low performance score and reduced body weight were independent predictive factors for death during chemotherapy. The modified Karnofsky performance score is a simple and reproducible clinical instrument, able to estimate patient outcome after treatment of CTVT.

          Translated abstract

          Investigou-se a utilidade clínica de uma escala de qualidade de vida durante o tratamento quimioterápico de cães com tumor venéreo transmissível canino (TVTC) em 93 animais com TVTC que compuseram este estudo prospectivo. Ao diagnóstico, foram avaliados os dados clínicos e o escore de qualidade de vida adaptado para cães (CKS). Os animais foram tratados com sulfato de vincristina (0.025mg/kg) semanalmente até o desaparecimento macroscópico do tumor. Foram anotados o tempo até o aparecimento do primeiro evento adverso e a morte. Em estudo piloto do CKS, alta concordância entre os observadores foi demonstrada (kappa = 0.735; weighted kappa = 0.835). O CKS permitiu um detalhado monitoramento dos eventos adversos durante a terapia. A regressão Cox multivariada demonstrou que o baixo escore de qualidade de vida e o reduzido peso corporal foram fatores preditivos independentes para o óbito durante a quimioterapia. A escala modificada de Karnofsky é um instrumento clínico simples e reproduzível, hábil em estimar os efeitos do tratamento no TVTC.

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          Most cited references21

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          Clonal origin and evolution of a transmissible cancer.

          The transmissible agent causing canine transmissible venereal tumor (CTVT) is thought to be the tumor cell itself. To test this hypothesis, we analyzed genetic markers including major histocompatibility (MHC) genes, microsatellites, and mitochondrial DNA (mtDNA) in naturally occurring tumors and matched blood samples. In each case, the tumor is genetically distinct from its host. Moreover, tumors collected from 40 dogs in 5 continents are derived from a single neoplastic clone that has diverged into two subclades. Phylogenetic analyses indicate that CTVT most likely originated from a wolf or an East Asian breed of dog between 200 and 2500 years ago. Although CTVT is highly aneuploid, it has a remarkably stable genotype. During progressive growth, CTVT downmodulates MHC antigen expression. Our findings have implications for understanding genome instability in cancer, natural transplantation of allografts, and the capacity of a somatic cell to evolve into a transmissible parasite.
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            Review of canine transmissible venereal sarcoma.

            U. Das, A K Das (2000)
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              Lymphocyte functions in dairy cows in hot environment

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                Author and article information

                Journal
                abmvz
                Arquivo Brasileiro de Medicina Veterinária e Zootecnia
                Arq. Bras. Med. Vet. Zootec.
                Universidade Federal de Minas Gerais, Escola de Veterinária (Belo Horizonte, MG, Brazil )
                0102-0935
                1678-4162
                October 2010
                : 62
                : 5
                : 1086-1093
                Affiliations
                [02] Campinas SP orgnameUNICAMP orgdiv1Faculdade de Ciências Médicas
                [01] Taubaté SP orgnameCentro de Controle de Zoonoses
                Article
                S0102-09352010000500010 S0102-0935(10)06200510
                7bdfad6c-9e75-4d07-86ef-8fc64834a3f0

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 10 September 2010
                : 24 June 2009
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 21, Pages: 8
                Product

                SciELO Brazil

                Categories
                Veterinary Medicine

                canine transmissible venereal tumor,escala de qualidade de vida,sobrevida,vincristina,tumor venéreo transmissível canino,quality of life,performance score,survival,vincristine

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