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Updated: Mar 7, 2026
Porphyromonas gingivalis as a Model Organism for Assessing Interaction of Anaerobic Bacteria with Host Cells
Published on: December 17, 2015
Molecular pathways underlying inhibitory effect of antimicrobial peptide Nal-P-113 on bacteria biofilms formation of
Hong-Yan Wang1, Li Lin1, Li-Si Tan1
1Department of Periodontics, School of Stomatology, China Medical University, Shenyang, 110002, China.
Background:
Wound-related infection remains a major challenge for health professionals. One disadvantage in conventional antibiotics is their inability to penetrate biofilms, the main protective strategy for bacteria to evade irradiation. Previously, we have shown that synthetic antimicrobial peptides could inhibit bacterial biofilms formation.
Results:
In this study, we first delineated how Nal-P-113, a novel antimicrobial peptide, exerted its inhibitory effects on Porphyromonas gingivalis W83 biofilms formation at a low concentration. Secondly, we performed gene expression profiling and validated that Nal-P-113 at a low dose significantly down-regulated genes related to mobile and extrachromosomal element functions, transport and binding proteins in Porphyromonas gingivalis W83.
Conclusions:
These findings suggest that Nal-P-113 at low dose is sufficient to inhibit the formation of biofilms although Porphyromonas gingivalis W83 may maintain its survival in the oral cavity. The newly discovered molecular pathways may add the knowledge of developing a new strategy to target bacterial infections in combination with current first-line treatment in periodontitis.
Insights
A novel antimicrobial peptide, Nal-P-113, effectively inhibits Porphyromonas gingivalis biofilms at low concentrations. This peptide down-regulates key bacterial genes, offering a potential new strategy against wound infections.
Area of Science:
- Microbiology
- Biochemistry
- Drug Discovery
Background:
- Wound infections pose a significant clinical challenge.
- Bacterial biofilms impede conventional antibiotic efficacy.
- Antimicrobial peptides show promise in inhibiting biofilm formation.
Purpose of the Study:
- To investigate the inhibitory effects of Nal-P-113 on Porphyromonas gingivalis biofilms.
- To elucidate the molecular mechanisms underlying Nal-P-113's action.
Main Methods:
- Assessing Nal-P-113's impact on Porphyromonas gingivalis W83 biofilm formation.
- Conducting gene expression profiling to identify targeted pathways.
Main Results:
- Nal-P-113 significantly inhibited Porphyromonas gingivalis W83 biofilm formation at low concentrations.
- Gene expression analysis revealed down-regulation of genes involved in mobile element functions and transport proteins.
Conclusions:
- Low-dose Nal-P-113 is effective in inhibiting Porphyromonas gingivalis biofilms.
- Identified molecular pathways offer novel targets for combating bacterial infections, potentially in combination therapies for periodontitis.
