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Apoptosis: an innate immune response to virus infection
1Dept of Biochemistry, University of Alberta, Edmonton, Alberta, Canada T6G 2H7.
Abstract:
Viruses can induce apoptosis of infected cells either directly, to assist virus dissemination, or by inadvertently triggering cellular sensors that initiate cell death. Cellular checkpoints that can function as 'alarm bells' to transmit pro-apoptotic signals in response to virus infections include death receptors, protein kinase R, mitochondrial membrane potential, p53 and the endoplasmic reticulum.
Insights
Viruses trigger programmed cell death (apoptosis) to spread or by activating cellular alarm systems. Key pathways like death receptors and p53 initiate these virus-induced apoptosis signals.
Area of Science:
- Virology
- Cell Biology
- Immunology
Background:
- Viruses can manipulate host cell processes, including cell death pathways.
- Apoptosis (programmed cell death) is a crucial cellular mechanism with implications in viral infections.
Purpose of the Study:
- To elucidate the mechanisms by which viruses induce apoptosis in infected cells.
- To identify cellular checkpoints that act as sensors for virus-induced cell death.
Main Methods:
- Review of existing literature on viral apoptosis induction.
- Analysis of cellular signaling pathways involved in apoptosis.
- Identification of key cellular checkpoints (e.g., death receptors, protein kinase R, p53).
Main Results:
- Viruses can directly induce apoptosis to facilitate dissemination.
- Inadvertent triggering of cellular sensors by viruses leads to apoptosis.
- Cellular checkpoints like death receptors, protein kinase R, p53, and endoplasmic reticulum act as alarm systems.
Conclusions:
- Virus-induced apoptosis is a multifaceted process involving direct viral action and host cell responses.
- Cellular checkpoints play a critical role in detecting and responding to viral infections through apoptosis.
- Understanding these pathways is vital for antiviral strategies.