title: Permanent cell lines that show temperature-dependent expression of adenovirus virus-associated RNA.
abstract: Temperature-sensitive COS cells, clone E540, have been stably transformed at a restrictive temperature with plasmid pVA1, which contains the adenovirus type 5 virus-associated (VA) genes in addition to the Neor marker. Transformed cell clones, named EVA cells, contained adenovirus DNA in an integrated form while grown at restrictive temperature but accumulated up to 100 to 200 copies of the input plasmid per cell after temperature shift down. Concomitant with this gene amplification, an accumulation of VA RNA was observed, reaching average concentrations of 10(4) to 10(5) copies per cell. The VA RNA synthesized in EVA cells is functional, as judged by inhibition of in vitro eucaryotic initiation factor-2 phosphorylation and enhancement of reporter gene expression. These EVA cell lines may be of use to study the mechanism of VA RNA function in the absence of adenovirus infection.
authors.affiliation: Centro de Biología Molecular (CSIC-UAM), Universidad Autónoma, Madrid, Spain.
authors.forename: C
authors.initials: C
authors.lastname: Martínez
authors.forename: S
authors.initials: S
authors.lastname: de la Luna
authors.forename: F
authors.initials: F
authors.lastname: Peláez
authors.forename: A
authors.initials: A
authors.lastname: Lopez-Turiso
authors.forename: J
authors.initials: J
authors.lastname: Valcárcel
authors.forename: C
authors.initials: C
authors.lastname: de Haro
authors.forename: J
authors.initials: J
authors.lastname: Ortín
mesh_terms: D000123:Acetyltransferases / Q000235:genetics / Q000378:metabolism; D000260:Adenoviruses, Human / Q000235:genetics*; D000818:Animals; D002460:Cell Line; D002471:Cell Transformation, Neoplastic; D004279:DNA, Viral / Q000235:genetics / Q000302:isolation & purification; D005784:Gene Amplification; D015870:Gene Expression; D005814:Genes, Viral; D010957:Plasmids; D012367:RNA, Viral / Q000235:genetics*; D015183:Restriction Mapping; D013696:Temperature
chemical_list: D004279:DNA, Viral; D012367:RNA, Viral; D000123:Acetyltransferases; C045336:puromycin N-acetyltransferase