Viral Aggregation: The Knowns and Unknowns.

Area of Science:

• Virology
• Molecular Biology
• Biophysics

Background:

• Viral aggregation is a widespread phenomenon observed across numerous viral families.
• Its influence on viral infectivity, pathogenesis, and evolution is increasingly recognized.
• Aggregation can modulate critical infection parameters, affecting viral fitness and host responses.

Purpose of the Study:

• To review current knowledge on viral aggregation, focusing on direct observations and mechanistic studies.
• To identify and discuss the unknowns and biological implications of viral aggregation.
• To explore the therapeutic potential of viral aggregation and suggest future research directions.

Main Methods:

• Literature review of studies with direct observations of viral aggregation.
• Analysis of mechanistic studies detailing the viral aggregation process.
• Synthesis of findings to discuss biological implications and therapeutic potential.

Main Results:

• Aggregation can enhance infection by increasing cellular multiplicity of infection (MOI), aiding in overcoming infection failures.
• Conversely, aggregation may impede viral dispersal and initial infection establishment.
• The net effect of aggregation is context-dependent, varying with viral species, aggregating factors, and spatiotemporal conditions.

Conclusions:

• Viral aggregation presents a complex trade-off between promoting infection and limiting dispersal.
• Further research is needed to fully understand its role in viral life cycles and to harness its therapeutic potential.
• Key challenges include elucidating context-specific effects and developing targeted interventions.