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10:23
Evaluation of Caspase Activation to Assess Innate Immune Cell Death
Published on: January 20, 2023
Caspase 3 activation during herpes simplex virus 1 infection
Rachel M Kraft1, Marie L Nguyen, Xiao-He Yang
1Department of Microbiology, One Gustave L. Levy Place, Mount Sinai School of Medicine, New York, NY 10029-6574, USA.
Virus Research
|April 20, 2006
Summary
Herpes simplex virus 1 (HSV-1) infection activates caspase 3 and caspase 7, leading to apoptosis. However, HSV-1 also prevents infected cells from dying, indicating complex host-virus interactions.
Area of Science:
- Virology
- Cell Biology
- Immunology
Background:
- Herpes simplex virus 1 (HSV-1) infection initiates apoptosis through immediate early gene transcription.
- Previous studies showed reduced procaspase 3 levels during HSV-1 replication.
Purpose of the Study:
- To investigate the role of caspases in HSV-1-induced apoptosis.
- To understand how HSV-1 modulates the apoptotic process in infected cells.
Main Methods:
- Utilized a replication-defective HSV-1 recombinant virus.
- Assessed caspase 3 and caspase 7 activation in infected cells.
- Compared apoptosis in MCF-7 cells with and without ectopic caspase 3 expression.
Main Results:
- A replication-defective HSV-1 activated caspase 3 but prevented cell death.
- Maximum active caspase 3 accumulation correlated with complete apoptosis.
- Caspase 7 was also activated during HSV-1-induced apoptosis.
- Ectopic caspase 3 expression enhanced apoptosis in MCF-7 cells, but other factors contributed to resistance.
Conclusions:
- Caspase 3 activation is a consequence of HSV-1 infection.
- HSV-1 actively modulates apoptosis, not just as a response to abortive infection.
- Cellular factors beyond caspase 3 influence resistance to HSV-1-dependent apoptosis.
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