Viral FLICE-inhibitory proteins (FLIPs) prevent apoptosis induced by death receptors

Margot Thome, Pascal Schneider, Kay Hofmann, Helmut Fickenscher, Edgar Meinl, Frank Neipel, Chantal Mattmann, Kim Burns, Jean-Luc Bodmer, Michael Schröter, Carsten Scaffidi, Peter H. Krammer, Marcus E. Peter and Jürg Tschopp
Additional contact information
Margot Thome: University of Lausanne
Pascal Schneider: University of Lausanne
Kay Hofmann: BIL Biomedical Research Center
Helmut Fickenscher: Friedrich-Alexander University Erlangen-Nürnberg
Edgar Meinl: Friedrich-Alexander University Erlangen-Nürnberg
Frank Neipel: Friedrich-Alexander University Erlangen-Nürnberg
Chantal Mattmann: University of Lausanne
Kim Burns: University of Lausanne
Jean-Luc Bodmer: University of Lausanne
Michael Schröter: University of Lausanne
Carsten Scaffidi: German Cancer Research Center
Peter H. Krammer: German Cancer Research Center
Marcus E. Peter: German Cancer Research Center
Jürg Tschopp: University of Lausanne

Nature, 1997, vol. 386, issue 6624, 517-521

Abstract: Abstract Viruses have evolved many distinct strategies to avoid the host's apoptotic response1,2. Here we describe a new family of viral inhibitors (v-FLIPs) which interfere with apoptosis signalled through death receptors3 and which are present in several γ-herpesviruses (including Kaposi's-sarcoma-associated human herpesvirus-8), as well as in the tumorigenic human molluscipoxvirus4. v-FLIPs contain two death-effector domains which interact with the adaptor protein FADD5,6, and this inhibits the recruitment and activation of the protease FLICE7,8 by the CD95 death receptor3. Cells expressing v-FLIPs are protected against apoptosis induced by CD95 or by the related death receptors TRAMP9–12 and TRAIL-R. The herpesvirus saimiri FLIP is detected late during the lytic viral replication cycle, at a time when host cells are partially protected from CD95-ligand-mediated apoptosis. Protection of virus-infected cells against death-receptor-induced apoptosis may lead to higher virus production and contribute to the persistence and oncogenicity13 of several FLIP-encoding viruses.

Date: 1997
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DOI: 10.1038/386517a0

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