Related Experiment Video
Updated: Jun 10, 2025
12:02
Assays for the Identification of Novel Antivirals against Bluetongue Virus
Published on: October 11, 2013
14.0K
Betulonic Acid Inhibits Type-2 Porcine Reproductive and Respiratory Syndrome Virus Replication by Downregulating
Feixiang Long1,2, Lizhan Su1,2, Mingxin Zhang1,2
1Guangdong Provincial Key Laboratory of Veterinary Pharmaceutics Development and Safety Evaluation, Guangzhou 510642, China.
International Journal of Molecular Sciences
|October 16, 2024
Summary
Betulonic acid shows promise in combating Porcine Reproductive and Respiratory Syndrome Virus (PRRSV). This natural compound inhibits PRRSV infection by reducing cellular energy production, offering a new antiviral strategy.
Area of Science:
- Veterinary Virology
- Antiviral Drug Discovery
Background:
- Porcine Reproductive and Respiratory Syndrome (PRRS) poses a significant global economic threat to the swine industry.
- Existing vaccines provide limited protection against Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) transmission, necessitating new therapeutic strategies.
Purpose of the Study:
- To investigate the antiviral potential of betulonic acid (BA) against Porcine Reproductive and Respiratory Syndrome Virus (PRRSV) infections.
- To elucidate the mechanism of action of betulonic acid in inhibiting PRRSV replication.
Main Methods:
- Antiviral activity of betulonic acid was assessed in vitro using Marc-145 cells and primary porcine alveolar macrophages (PAMs).
- Inhibition concentrations (IC50) were determined against three type-2 PRRSV strains.
- Cellular ATP production levels were measured to understand the mechanism of action.
Main Results:
- Betulonic acid demonstrated potent inhibition of PRRSV infection with IC50 values between 3.3 µM and 3.7 µM.
- The antiviral effect of betulonic acid was linked to the reduction of cellular ATP production.
- PRRSV replication was found to be dependent on host cellular ATP supply.
Conclusions:
- Betulonic acid is a promising therapeutic candidate for treating PRRSV infections.
- Targeting host cellular ATP production represents a viable strategy for controlling PRRSV.
- Further research into betulonic acid could lead to novel treatments for PRRSV epidemics.
