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[Inhibition of apoptosis by a baculovirus p35 gene]
T Ohtsubo1, S Kamada, Y Tsujimoto
1Biotech. Lab., Sumitomo Chemical Co., LTD.
Abstract:
The baculovirus gene p35 inhibits virus-induced apoptosis in insect cells. p35 can also inhibit developmentally programmed cell death in Caenorhabditis elegans and Drosophila, mammalian neuronal cell death induced by serum or NGF deprivation, and Fas- and tumor necrosis factor (TNF)-induced apoptosis in mammalian cells, indicating that p35 may interrupt an evolutionally conserved component of the death machinery. Recently it has been shown that p35 protein functions as an inhibitor of ICE/CED-3 cysteine protease family that seem to play an important role in an apoptotic pathway. This observation indicates that p35 may inhibit apoptosis by directly blocking the activities of these cysteine proteases in diverse animals.
Insights
The baculovirus p35 gene inhibits apoptosis, programmed cell death, and other cell death pathways across diverse species. It functions by blocking cysteine proteases crucial to the cell death machinery.
Area of Science:
- Molecular Biology
- Cell Biology
- Virology
Context:
- Apoptosis, or programmed cell death, is a fundamental biological process. Dysregulation of apoptosis is implicated in various diseases.
- The baculovirus gene p35 is known to interfere with virus-induced apoptosis in insect cells.
- Previous research suggests p35 has a broader role in inhibiting cell death across different organisms.
Purpose:
- To investigate the mechanism by which the baculovirus p35 gene inhibits apoptosis.
- To determine if p35 acts on a conserved component of the cell death pathway.
- To explore the potential of p35 as a universal inhibitor of apoptosis.
Summary:
- The baculovirus gene p35 effectively inhibits apoptosis in insect cells.
- p35 demonstrates conserved anti-apoptotic function, suppressing developmentally programmed cell death in C. elegans and Drosophila, and neuronal cell death in mammals.
- p35 also blocks Fas- and TNF-induced apoptosis in mammalian cells, indicating a conserved role in the cell death machinery.
- Recent findings reveal that p35 protein inhibits ICE/CED-3 cysteine proteases, key players in apoptotic pathways.
- This suggests p35 broadly inhibits apoptosis by directly targeting these cysteine proteases in various animal species.
Impact:
- p35 represents a conserved inhibitor of apoptosis, targeting critical cysteine proteases.
- Understanding p35's mechanism provides insights into evolutionarily conserved cell death pathways.
- This research may lead to novel therapeutic strategies for diseases involving aberrant apoptosis.