title: Establishment of persistent foot-and-mouth disease virus (FMDV) infection in MDBK cells.
abstract: In addition to acute infection and disease, foot-and-mouth disease virus (FMDV) can cause persistent infection in ruminants. Such "carrier" animals represent a potential risk for FMDV transmission to susceptible animals. However, the mechanisms and the factors that determine FMDV persistence remain unknown. We describe here the establishment of FMDV type O persistent infection in a bovine epithelial cell line (Madin-Darby bovine kidney; MDBK). Preliminary experiments to assess the permissivity of MDBK cells to FMDV O infection revealed an unusual pattern of infection: after the initial phase of acute cell lysis, new monolayers formed within 48-72 h post-infection. We found that some cells survived cytolytic infection and subsequently regrew, thereby demonstrating that this bovine cell line can be persistently infected with FMDV type O. Further evidence that MDBK cells were persistently infected with FMDV includes: (i) detection of viral RNA in cells as well as in cell culture supernatants, (ii) detection of viral antigens in the cells by immunofluorescence analysis, and (iii) production of infectious viral particles for up to 36 cell passages. Furthermore, preliminary sequence analysis of persistent virus revealed a single nucleotide substitution within the VP1 coding region, resulting in the V50A amino acid substitution. This bovine model of FMDV persistence holds promise for the investigation of the viral and cellular molecular determinants that promote FMDV persistence.
authors.affiliation: Université Paris-Est, ANSES, Laboratoire de Santé Animale, UMR Virologie 1161, 14 rue Pierre et Marie Curie, 94700, Maisons-Alfort, France.
authors.forename: Lela
authors.initials: L
authors.lastname: Kopliku
authors.affiliation: Université Paris-Est, ANSES, Laboratoire de Santé Animale, UMR Virologie 1161, 14 rue Pierre et Marie Curie, 94700, Maisons-Alfort, France.
authors.forename: Anthony
authors.initials: A
authors.lastname: Relmy
authors.affiliation: Université Paris-Est, ANSES, Laboratoire de Santé Animale, UMR Virologie 1161, 14 rue Pierre et Marie Curie, 94700, Maisons-Alfort, France.
authors.forename: Aurore
authors.initials: A
authors.lastname: Romey
authors.affiliation: Université Paris-Est, ANSES, Laboratoire de Santé Animale, UMR Virologie 1161, 14 rue Pierre et Marie Curie, 94700, Maisons-Alfort, France.
authors.forename: Kamila
authors.initials: K
authors.lastname: Gorna
authors.affiliation: Université Paris-Est, ANSES, Laboratoire de Santé Animale, UMR Virologie 1161, 14 rue Pierre et Marie Curie, 94700, Maisons-Alfort, France.
authors.forename: Stephan
authors.initials: S
authors.lastname: Zientara
authors.affiliation: Université Paris-Est, ANSES, Laboratoire de Santé Animale, UMR Virologie 1161, 14 rue Pierre et Marie Curie, 94700, Maisons-Alfort, France.
authors.forename: Labib
authors.initials: L
authors.lastname: Bakkali-Kassimi
authors.affiliation: Université Paris-Est, ANSES, Laboratoire de Santé Animale, UMR Virologie 1161, 14 rue Pierre et Marie Curie, 94700, Maisons-Alfort, France. sandra.blaise-boisseau@anses.fr.
authors.forename: Sandra
authors.initials: S
authors.lastname: Blaise-Boisseau
mesh_terms: D000818:Animals; D002417:Cattle; D002418:Cattle Diseases / Q000821:virology*; D002460:Cell Line; D005536:Foot-and-Mouth Disease / Q000821:virology*; D029544:Foot-and-Mouth Disease Virus / Q000235:genetics / Q000254:growth & development / Q000502:physiology*; D014776:Virus Cultivation