Huaier Polysaccharide Interrupts PRV Infection via Reducing Virus Adsorption and Entry

Area of Science:

• Veterinary Virology
• Natural Product Antivirals

Background:

• A novel virulent variant of pseudorabies virus (PRV) emerged in China in 2011.
• Limited knowledge exists regarding effective prevention and treatment strategies for PRV infections.
• Huaier polysaccharide, known for anti-cancer properties, has uninvestigated antiviral potential.

Purpose of the Study:

• To investigate the antiviral activity of Huaier polysaccharide against PRV XJ5.
• To determine the mechanism of action of Huaier polysaccharide in inhibiting PRV infection.

Main Methods:

• In vitro experiments using PK15 cells infected with PRV XJ5.
• Dose-dependent assays to evaluate the effect on virus adsorption and entry.
• Assessment of PRV replication suppression.
• Direct virus inactivation assays.

Main Results:

• Huaier polysaccharide demonstrated significant inhibition of PRV XJ5 infection in PK15 cells.
• Inhibition occurred in a dose-dependent manner, affecting virus adsorption and cellular entry.
• The polysaccharide suppressed PRV replication within infected cells.
• Direct inactivation of PRV XJ5 by Huaier polysaccharide was observed.

Conclusions:

• Huaier polysaccharide exhibits potent antiviral activity against PRV XJ5.
• The compound acts by inhibiting viral adsorption, entry, replication, and direct inactivation.
• Huaier polysaccharide represents a potential novel therapeutic agent for PRV control.