Comparative Mechanisms of Different Bifidobacteria in Combating Pathogen Infection and Prolonging the Lifespan in Caenorhabditis elegans.
- 2025-12-16
- Microorganisms 13(12)
- Xueer Wang
- Shixiang Wu
- Wen Zhao
- Zhaozhong Zeng
- Jian He
- Hanglian Lan
- Bing Fang
- Haina Gao
- Yue Liu
- Jingyu Li
- Weilian Hung
- Ming Zhang
- PubMed: 41472063
- DOI: 10.3390/microorganisms13122861
Study Design
- Population
- Caenorhabditis elegans
- Methods
- The research employed Caenorhabditis elegans to compare the anti-infection and lifespan-extending properties of Bifidobacterium.
The research employed Caenorhabditis elegans to compare the anti-infection and lifespan-extending properties of Bifidobacterium. The results demonstrated that BL-99 and YLGB-1496 intervention improved the nematodes' resistance to Staphylococcus aureus infection, resulting in lifespan extensions of 5.90% and 14.38%, respectively, accompanied by the alleviation in the decline of pharyngeal pumping rate and locomotor capacity. Furthermore, both probiotic strains significantly extended the mean lifespan of nematodes by 10.96% and 12.14%, and significantly alleviated pharyngeal pumping and locomotion. Importantly, BL-99 and YLGB-1496 have different underlying mechanisms of action. Transcriptomic analyses indicated that the BL-99 strain enhanced nematode resistance to Gram-positive pathogens through the upregulation of lysozyme, saposin-like antimicrobial peptides, and c-type lectin family genes. Conversely, YLGB-1496 improved the epidermal permeability barrier by upregulating genes involved in collagen synthesis and assembly. Overall, this study provides novel insights into the species-specific effects of Bifidobacteria on pathogen resistance and lifespan extension.