Abstract
Purpose: To investigate the antibacterial activity of pimaradienoic acid, a natural product isolated from Eleutherococcus trifoliatus. Methods: Pimaradienoic acid was purified from E. trifoliatus and tested against three Gram-positive bacteria. Minimum inhibitory concentrations (MICs) were determined, and bacterial growth curves were measured. Scanning electron microscopy (SEM) was used to observe morphological changes in bacteria after drug treatment. Results: Pimaradienoic acid exhibited concentration-dependent inhibition of the growth of the three bacteria tested. The MIC and bacterial growth dynamics results indicated that pimaradienoic acid had potent antibacterial activity. SEM revealed that pimaradienoic acid disrupted the bacterial membrane, leading to cell death. Conclusions: Pimaradienoic acid has significant antibacterial activity against Gram-positive bacteria, suggesting its potential as a novel antimicrobial agent.
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