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Effect of KLP-602 on virus replication in cell cultures
1Department of Infectious and Invasive Diseases, Chair of Clinical Microbiology and Immunology, Faculty of Veterinary Medicine, University of Warmia and Mazury in Olsztyn Oczapowskiego 13, 10-718 Olsztyn, Poland. stenia@uwm.edu.pl
Abstract:
The effect of KLP-602 (active substance: lysozyme dimer) on the replication of two animal viruses: the TK900 strain of Aujeszky's disease virus and the Roakin strain of the Newcastle disease virus were investigated. The maximal tolerable dose of the drug was determined for two cell cultures (CECC and GMK) and the effect of the medicine on the titre range of infectious viruses and their adsorption was assayed. The direct impact of KLP-602 on the viral strains used was also determined. And finally the replication dynamics of viruses in the presence of KLP-602 preparation was estimated. KLP-602 showed no direct effect on either the viruses applied in the study or their adsorption. The drug, introduced into the culture 24 hours before its infection, did not affect the replication of the pseudorabies virus, but decreased the titre of the Newcastle disease virus. KLP-602 introduced simultaneously with the infection considerably lowered the final titres of both viruses. The medicine had the greatest inhibitory effect on the replication dynamics of both types of viruses in the CECC and of the pseudorabies virus in the GMK culture upon the maximal tolerable concentrations of drug and low infectious doses of viruses applied.
Insights
KLP-602 (lysozyme dimer) demonstrated antiviral effects against Newcastle disease virus and pseudorabies virus. The drug significantly reduced viral replication when administered concurrently with infection, particularly at maximal tolerable concentrations.
Area of Science:
- Veterinary Virology
- Antiviral Research
- Molecular Biology
Background:
- Animal viral diseases pose significant threats to livestock and public health.
- Investigating novel antiviral agents is crucial for disease control.
- Lysozyme dimers represent a potential therapeutic avenue.
Purpose of the Study:
- To evaluate the antiviral efficacy of KLP-602 (lysozyme dimer) against Aujeszky's disease virus (pseudorabies virus) and Newcastle disease virus.
- To determine the optimal conditions for KLP-602's antiviral activity.
- To assess the safety and impact of KLP-602 on host cells.
Main Methods:
- Virus titration assays to quantify viral load.
- Viral adsorption assays to assess virus-cell interaction.
- Cell culture studies using CECC and GMK cell lines.
- Determination of maximal tolerable drug concentrations.
Main Results:
- KLP-602 exhibited no direct virucidal effect or impact on viral adsorption.
- Pre-treatment with KLP-602 did not inhibit pseudorabies virus but reduced Newcastle disease virus titers.
- Simultaneous administration of KLP-602 significantly lowered final titers of both viruses.
- Maximal inhibitory effect observed at maximal tolerable concentrations and low viral doses.
Conclusions:
- KLP-602 demonstrates significant antiviral activity against Newcastle disease virus and pseudorabies virus, particularly when administered during infection.
- The drug's efficacy is dependent on timing of administration, concentration, and viral load.
- KLP-602 shows promise as a therapeutic agent for specific viral infections in animals.
