Viral therapy: prospects for protease inhibitors

Area of Science:

• Virology
• Biochemistry
• Drug Discovery

Background:

• Viral proteases are essential for virus replication.
• Protease inhibitors are explored as antiviral agents.

Purpose of the Study:

• To evaluate antiviral activities of known protease inhibitors.
• To investigate the potential of cystatin superfamily members as antiviral agents.

Main Methods:

• Assaying antiviral activities in virus-infected cell cultures.
• Performing binding assays with purified components (cystatins and poliovirus protease).

Main Results:

• Chicken cystatin and human cystatin demonstrated antiviral activity.
• Cystatins bound to poliovirus protease with affinities correlating to their antiviral potency.

Conclusions:

• Cystatin superfamily members, particularly chicken cystatin, exhibit significant antiviral potential.
• Protease inhibitors, including cystatins, hold promise for clinical applications in treating viral infections.