title: Characterization of enzootic nasal tumour virus of goats: complete sequence and tissue distribution.
abstract: The complete genome sequence of a new isolate of enzootic nasal tumour virus (ENTV-2), associated with enzootic nasal adenocarcinoma (ENA) of goats, was determined. The genome exhibits a genetic organization characteristic of beta-retroviruses. ENTV-2 is closely related to the retrovirus (ENTV-1) associated with enzootic adenocarcinoma of sheep, and to jaagsiekte retrovirus. The main sequence differences between these viruses reside in orfX, the U3 LTR, two small regions in gag and the transmembrane (TM) region of env. Sequence analysis of the TM region of env from several sheep and goats naturally affected by ENA suggested that ENTV-1 and ENTV-2 are distinct viruses rather than geographical variants. Although both viruses transform secretory epithelial cells of the ethmoid turbinate, the study of their tissue distribution using specific PCRs showed that ENTV-2 establishes a disseminated lymphoid infection whereas ENTV-1 is mainly confined to the tumour.
authors.affiliation: Facultad de Veterinaria, Departamento de Patología Animal, University of Zaragoza, Miguel Servet 177, Zaragoza, Spain.
authors.forename: Aurora
authors.initials: A
authors.lastname: Ortín
authors.affiliation: Moredun Research Institute, Edinburgh, UK.
authors.forename: Christina
authors.initials: C
authors.lastname: Cousens
authors.affiliation: Facultad de Veterinaria, Departamento de Patología Animal, University of Zaragoza, Miguel Servet 177, Zaragoza, Spain.
authors.forename: Esmeralda
authors.initials: E
authors.lastname: Minguijón
authors.affiliation: Facultad de Veterinaria, Departamento de Patología Animal, University of Zaragoza, Miguel Servet 177, Zaragoza, Spain.
authors.forename: Zoraida
authors.initials: Z
authors.lastname: Pascual
authors.affiliation: Facultad de Veterinaria, Departamento de Patología Animal, University of Zaragoza, Miguel Servet 177, Zaragoza, Spain.
authors.forename: Maider Pérez de
authors.initials: MP
authors.lastname: Villarreal
authors.affiliation: Moredun Research Institute, Edinburgh, UK.
authors.forename: J Michael
authors.initials: JM
authors.lastname: Sharp
authors.affiliation: Facultad de Veterinaria, Departamento de Patología Animal, University of Zaragoza, Miguel Servet 177, Zaragoza, Spain.
authors.forename: Marcelo De Las
authors.initials: ML
authors.lastname: Heras
mesh_terms: D000818:Animals; D001483:Base Sequence; D015511:Goat Diseases / Q000821:virology; D006041:Goats / Q000821:virology*; D008221:Lymphoid Tissue / Q000821:virology; D008969:Molecular Sequence Data; D009669:Nose Neoplasms / Q000821:virology*; D012190:Retroviridae / Q000145:classification* / Q000235:genetics / Q000302:isolation & purification*; D012192:Retroviridae Infections / Q000821:virology*; D017422:Sequence Analysis, DNA; D014412:Tumor Virus Infections / Q000821:virology*