Bystander Killing during Avian Leukosis Virus Subgroup B Infection Requires TVBS3 Signaling

Felipe Diaz-Griffero, Steven A. Hoschander, Jürgen Brojatsch

Research output: Contribution to journalArticlepeer-review

11 Scopus citations


Cell killing by avian leukosis virus subgroup B (ALV-B) in cultures has been extensively studied, but the molecular basis of this process has not been established. Here we show that superinfection, which has been linked to cell killing by ALV-B, plays no crucial role in cell death induction. Instead, we show that signaling by the ALV-B receptor, TVBS3, a member of the tumor necrosis factor receptor family, is essential for ALV-B-mediated cell death. TVBS3 activated caspase-dependent apoptosis during ALV-B infection. Strikingly, apoptosis induction occurred predominantly in uninfected cells, while ALV-B-infected cells were protected against cell death. This bystander killing phenomenon was reproduced in a virus-free system by cocultivating ALV-B Env-expressing cells with TVBS3-expressing cells. Taken together, our results indicated that ALV-B-mediated apoptosis is triggered by ALV-B Env-TVBS3 interactions.

Original languageEnglish (US)
Pages (from-to)12552-12561
Number of pages10
JournalJournal of virology
Issue number23
StatePublished - Dec 2003

ASJC Scopus subject areas

  • Microbiology
  • Immunology
  • Insect Science
  • Virology

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