RESUMO
Papillomavirus infection in bovines is associated with cutaneous papillomatosis on the hide, udders and other epithelial tissues, as well as in oral respiratory, alimentary and urinary tract mucosa. Bovine papillomavirus (BPV) is also considered the etiological agent of esophageal tumors and the malignant bladder tumors that characterize the clinical condition associated with chronic enzootic hematuria. After infective viral DNA was found in cattle blood and BPV1, 2 and 4 DNA in cattle reproductive and embryonic tissues, we looked for and found BPV DNA in blood, milk, urine, seminal fluid, and spermatozoa of BPV-infected animals. Peripheral blood lymphocyte cultures from BPV-infected animals had high rates of chromosome aberrations, including radial rearrangements that signal oncogenic potential and viral interaction with telomeric regions. The finding of BPV DNA in body fluids and tissues other than the epithelium demonstrates co-infection of other tissues or cell types by papillomavirus and shows the potential role of lymphocytes, seminal fluid and spermatozoa in BPV transmission. Our findings reinforce a peremptory need for prophylactic and therapeutic instruments to curtail this disease in bovine livestock.
Assuntos
Doenças dos Bovinos/virologia , DNA Viral/análise , Papillomaviridae/isolamento & purificação , Infecções por Papillomavirus/veterinária , Animais , Bovinos , Doenças dos Bovinos/sangue , Doenças dos Bovinos/urina , Feminino , Masculino , Leite/virologia , Papillomaviridae/genética , Papillomaviridae/patogenicidade , Infecções por Papillomavirus/virologia , Espermatozoides/virologiaRESUMO
Bovine papillomavirus (BPV) DNA sequences were detected in different tissues, in addition to epithelium. Cytogenetic abnormalities were observed in blood lymphocytes. The presence of more than one virus in a single tissue is a difficult aspect to evaluate, especially when the DNA sequences are detected in tissues that are not specifically targeted by the virus. BPV and bovine leukemia virus (BLV) are clastogenic, causing chromosome aberrations in peripheral blood lymphocytes. In the present study, we investigated the simultaneous presence of DNA sequences of both viruses and the possibility of vertical transmission and compared the types of chromosome aberrations related to viral action. BPV 1, 2, and 4 DNA sequences were found in three females of the herd and in their offspring. BLV DNA sequences were not detected in their progeny. A newborn calf that was negative for BLV infection showed specific chromosome rearrangements possibly related to the effect of infection with BPV.
Assuntos
Papillomavirus Bovino 1/genética , Análise Citogenética/métodos , Hibridização In Situ/métodos , Vírus da Leucemia Bovina/genética , Animais , Animais Recém-Nascidos , Papillomavirus Bovino 1/isolamento & purificação , Bovinos , Aberrações Cromossômicas , Bandeamento Cromossômico , Leucose Enzoótica Bovina/diagnóstico , Leucose Enzoótica Bovina/virologia , Feminino , Cariotipagem , Vírus da Leucemia Bovina/isolamento & purificação , Infecções por Papillomavirus/diagnóstico , Infecções por Papillomavirus/veterinária , Infecções por Papillomavirus/virologia , Reação em Cadeia da PolimeraseRESUMO
Bovine papillomavirus (BPV) DNA sequences were detected in different tissues, in addition to epithelium. Cytogenetic abnormalities were observed in blood lymphocytes. The presence of more than one virus in a single tissue is a difficult aspect to evaluate, especially when the DNA sequences are detected in tissues that are not specifically targeted by the virus. BPV and bovine leukemia virus (BLV) are clastogenic, causing chromosome aberrations in peripheral blood lymphocytes. In the present study, we investigated the simultaneous presence of DNA sequences of both viruses and the possibility of vertical transmission and compared the types of chromosome aberrations related to viral action. BPV 1, 2, and 4 DNA sequences were found in three females of the herd and in their offspring. BLV DNA sequences were not detected in their progeny. A newborn calf that was negative for BLV infection showed specific chromosome rearrangements possibly related to the effect of infection with BPV.