Propriedades oncolíticas do vírus da cinomose canina: expressão da proteína 8 (TNFAIP8) em células de carcinoma mamário: Juliana Albarracin Garcia. -

Abstract

Oncolytic virotherapy is a novel strategy for treatment of cancer in humans and companion animals as well. Canine distemper virus (CDV), a paramyxovirus, has proven to be oncolytic through induction of apoptosis in canine-derived tumour cells, yet the mechanism behind this inhibitory action is poorly understood. In this study, three human mammary tumour cell lines and one canine-derived adenofibrossarcoma cell line were tested regarding to their susceptibility to CDV infection, apoptosis, mitochondrial membrane potential (MMP) and expression of tumour necrosis factor-alpha-induced protein 8 (TNFAIP8). CDV replication induced cytopathic effect and > 45% of infected cells were considered death and/or under late apoptosis/necrosis. TNFAIP8 and CDV M gene expression were positively correlated in all cell lines. In addition, MMP was highly associated with increase in virus titres (p<0.005). Thus, these results strongly suggest that both human and canine mammary tumour cells are potential candidates for studies concerning CDV-induced cancer therapy