Differential traits between microvesicles and exosomes in enterovirus infection

Area of Science:

• Virology
• Cell Biology
• Immunology

Background:

• Extracellular vesicles (EVs), including exosomes and microvesicles (MVs), are released by cells and reflect their condition.
• EVs from infected or tumor cells can contribute to disease pathogenesis.
• Characterization of EVs in infectious diseases, particularly enterovirus infections, is limited.

Purpose of the Study:

• To investigate subpopulations of EVs during human enterovirus infection.
• To explore the distinct traits and functions of exosomes and MVs in this context.
• To assess the diagnostic potential of EVs in enterovirus infections.

Main Methods:

• Development of an immunomagnetic method to isolate exosomes and MVs from infected cells, excluding virions.
• Analysis of EV morphology and size.
• Deep RNA sequencing of EV cargo.
• In vivo biodistribution studies.

Main Results:

• Enterovirus infection induced exosome secretion but not MV secretion.
• EV morphology and size remained largely unchanged post-infection.
• Differential biodistribution was observed between exosomes and MVs in vivo.
• Microvesicle cargo accurately reflected the pathological state of the source cells, unlike exosome cargo.

Conclusions:

• Enterovirus infection differentially affects exosome and microvesicle secretion.
• Microvesicles, due to their reflective cargo, show potential as clinical diagnostics for enterovirus infections.
• Further consideration of MVs as biomarkers in infectious diseases is warranted.