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THE STRUCTURAL CHANGES OF MACROPHAGES INFECTED WITH TICK-BORNE ENCEPHALITIS VIRUS
Tsitologiia
|September 6, 2018
Summary
Macrophages are key innate immune cells in viral infections. This study shows tick-borne encephalitis virus (TBEV) infects and replicates within macrophages, aiding its spread and influencing disease pathogenesis.
Area of Science:
- Immunology
- Virology
- Cell Biology
Background:
- Macrophages are crucial innate immune cells involved in host defense against viral pathogens.
- Tick-borne encephalitis virus (TBEV), a Flavivirus, causes significant human infections, particularly affecting the nervous system.
Purpose of the Study:
- To investigate the role of macrophages in the pathogenesis of tick-borne encephalitis virus (TBEV) infection.
- To elucidate the cellular mechanisms of TBEV entry, replication, and exit from macrophages.
Main Methods:
- Ultrastructural electron microscopy was employed to study macrophages infected with TBEV.
- Virological methods were used to confirm TBEV absorption and replication within macrophages.
Main Results:
- TBEV is absorbed and replicates within macrophages.
- Virus entry into macrophages occurs via local plasmalemma destruction, with new virus particles exiting similarly.
- Accumulation of ribosomes, microfilaments, and viral structures (nucleocapsids, tubular formations, viral layers) observed in the perinuclear cytoplasm.
Conclusions:
- Macrophages serve as target cells for TBEV, playing a role in viral spread.
- As antigen-presenting cells, macrophages can modulate the host's protective response and influence tick-borne encephalitis pathogenesis.
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