期刊
GEROSCIENCE
卷 42, 期 1, 页码 333-352出版社
SPRINGER
DOI: 10.1007/s11357-019-00137-4
关键词
Aging; Cell wall; Cognition; Goblet cell; Inflammation; Leaky gut; Lipoteichoic acid; Metabolism; Mucin; Probiotics; Physical function
资金
- National Institutes of Health [R01DK081842, R01HL142930, R01HL132035, R01AG059416, U13AG040938, R01AG052419, U24AG058556, KL2TR001421, R01AG018915, R01AG045551, U24AG059624]
- Pepper Older Americans for Independence Center [P30AG21332]
- Department of Defense [R01AG018915, W81XWH-18-1-0118, GRANT12726940/AZ180098]
- Center for Diabetes, Obesity and Metabolism, Wake Forest Baptist Medical Center
- National Center for Advancing Translational Sciences (NCATS), the National Institutes of Health [UL1TR001420]
Increased inflammation associated with leaky gut is a major risk factor for morbidity and mortality in older adults; however, successful preventive and therapeutic strategies against these conditions are not available. In this study, we demonstrate that a human-origin Lactobacillus paracasei D3-5 strain (D3-5), even in the non-viable form, extends life span of Caenorhabditis elegans. In addition, feeding of heat-killed D3-5 to old mice (> 79 weeks) prevents high- fat diet-induced metabolic dysfunctions, decreases leaky gut and inflammation, and improves physical and cognitive functions. D3-5 feeding significantly increases mucin production, and proportionately, the abundance of mucin-degrading bacteria Akkermansia muciniphila also increases. Mechanistically, we show that the lipoteichoic acid (LTA), a cell wall component of D3-5, enhances mucin (Muc2) expression by modulating TLR-2/p38-MAPK/NF-kB pathway, which in turn reduces age-related leaky gut and inflammation. The findings indicate that the D3-5 and its LTA can prevent/treat age-related leaky gut and inflammation.
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