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Updated: Jun 2, 2026

LPS and ATP-induced Death of PMA-differentiated THP-1 Macrophages and its Validation
Published on: May 3, 2024
Viral apoptotic mimicry party: P.S. Bring your own Gas6
1Institute of Biochemistry, ETH Zürich, Zürich, Switzerland. jason.mercer@bc.biol.ethz.ch
Abstract:
In the evolutionary battle between virus and host, viruses have developed numerous strategies to subjugate indispensable cellular functions. In this issue of Cell Host & Microbe, Morizono and colleagues (Morizono et al., 2011) describe how viruses hijack host apoptotic clearance machinery for entry. A host factor called Gas6 enhances infection by bridging virus phosphatidylserine to the clearance receptor Axl.
Insights
Viruses exploit host cell cleanup pathways to infect cells. A protein called Gas6 acts as a bridge, connecting viral particles to cellular receptors for entry.
Area of Science:
- Virology
- Cell Biology
- Immunology
Background:
- Viruses have evolved sophisticated mechanisms to overcome host defenses and ensure their replication.
- Understanding viral entry mechanisms is crucial for developing antiviral therapies.
Discussion:
- This study reveals a novel viral strategy involving the hijacking of the host's apoptotic clearance system.
- The findings highlight the intricate interplay between viral pathogenesis and host cellular processes.
Key Insights:
- Viruses utilize the host apoptotic clearance machinery to facilitate viral entry into cells.
- The Gas6-Axl signaling pathway plays a critical role in bridging viral phosphatidylserine to host cell receptors, enhancing infection.
Outlook:
- Further research into this viral entry mechanism could lead to new therapeutic targets.
- Exploring host-virus interactions in apoptotic pathways offers insights into broader cellular regulation.
Related Concept Videos
Apoptosis
Phagocytosis of Apoptotic Cells
Normal cells contain receptors that prevent them from being recognized by phagocytes.
The Intrinsic Apoptotic Pathway
Viral Replication: Lytic Cycle
The Extrinsic Apoptotic Pathway
Viral Recombination

