Bovine papillomavirus type 2 in reproductive tract and gametes of slaughtered bovine females Detecção de papilomavírus bovino tipo 2 em trato reprodutivo e gametas de fêmeas bovinas

Papillomaviruses are described selectively infecting epithelial tissues and are associated with many forms of cancer in different species. Considering the widespread dissemination of papillomatosis in livestock, interest is being centred on possible forms of viral transmission and respective mechani...

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Bibliographic Details
Main Authors: Claudemir de Carvalho, Antonio Carlos de Freitas, Olga Brunner, Luiz Gustavo Bentim Góes, Andréa Yaguiu Cavalcante, Willy Beçak, Rita de Cassia Stocco dos Santos
Format: Article
Language:English
Published: Sociedade Brasileira de Microbiologia 2003-11-01
Series:Brazilian Journal of Microbiology
Subjects:
PCR
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822003000500028
Description
Summary:Papillomaviruses are described selectively infecting epithelial tissues and are associated with many forms of cancer in different species. Considering the widespread dissemination of papillomatosis in livestock, interest is being centred on possible forms of viral transmission and respective mechanisms. In the present study, we report the detection of bovine papillomavirus (BPV) DNA sequences in female reproductive tract tissues, fluids and oocytes from slaughtered bovines not afflicted by cutaneous papillomatosis. BPV-2 DNA sequences were found in ovarian and uterine tissues as well as in oocytes, cumulus cells and uterine flushings. The presence of papillomavirus sequences in reproductive organ tissues and fluids shows that viral infection in organisms can be verified in others tissues, not only in epithelial ones. The present findings alert to the possibility of BPV transmission in embryo transfer programs and assisted fertilization procedures.<br>Os vírus do papiloma bovino, descritos como agentes infectantes específicos do epitélio, têm sido associados a diversas formas de câncer em diferentes espécies animais. Dada a intensa disseminação da papilomatose nos rebanhos, a investigação de diferentes formas de transmissão e seus respectivos mecanismos tem exigido especial atenção. No presente estudo, é relatada a detecção de seqüências genômicas do papilomavirus bovino (BPV) em ovócitos e tecidos do trato reprodutivo oriundos de fêmeas abatidas comercialmente, não apresentando papilomatose cutânea. A presença de DNA de BPV-2 em tecidos do trato reprodutivo, lavado uterino, ovócitos e células do cumulus traz evidências de que a infecção viral pode se desenvolver fora do tecido epitelial. Esses achados alertam para a possibilidade de transmissão do BPV através dos procedimentos de transferência de embriões e de fertilização in vitro.
ISSN:1517-8382
1678-4405