Gut Microbiome and Longevity: Akkermansia, Bifidobacterium, and Centenarian Microbiomes

Written by Adam Maggio | Medically reviewed by Dr. Sarah Chen, PharmD, BCPS

The composition and diversity of the gut microbiome play a crucial role in longevity, with specific genera like Akkermansia and Bifidobacterium frequently enriched in centenarians, contributing to metabolic health, immune function, and reduced inflammation.

The Microbial Architects of Longevity: Inside the Centenarian Gut

Once considered merely a digestive organ, the human gut is now recognized as a complex ecosystem teeming with trillions of microorganisms—the gut microbiome—that profoundly influences virtually every aspect of our health, from metabolism and immunity to brain function and even longevity. A growing body of research highlights the distinct microbial signatures associated with exceptional longevity, particularly in centenarians, pointing to specific bacterial genera like Akkermansia and Bifidobacterium as key players in promoting a longer, healthier life [1, 2].

Hallmarks of a Longevity-Associated Microbiome

Studies comparing the gut microbiomes of centenarians with younger adults consistently reveal several key characteristics associated with extreme longevity:

Increased Diversity: A diverse microbiome, rich in a wide array of bacterial species, is generally considered a hallmark of gut health and is often observed in centenarians. This diversity confers resilience and adaptability to dietary and environmental changes [3].

Enrichment of Beneficial Genera: Specific bacterial groups are consistently found in higher abundance in long-lived individuals. Two of the most prominent are Akkermansia muciniphila and various species of Bifidobacterium [4, 5].

Reduced Pathobionts: Conversely, the microbiomes of centenarians often show a lower abundance of pro-inflammatory or pathogenic bacteria.

Enhanced Butyrate Production: A healthy gut microbiome produces short-chain fatty acids (SCFAs) like butyrate, propionate, and acetate through the fermentation of dietary fiber. Butyrate, in particular, is a crucial energy source for colonocytes, strengthens the gut barrier, and exerts potent anti-inflammatory effects. Centenarian microbiomes often exhibit a higher capacity for SCFA production [6].

Key Players: Akkermansia and Bifidobacterium

Akkermansia muciniphila

Akkermansia muciniphila is a mucin-degrading bacterium that resides in the gut mucus layer. Its abundance is inversely correlated with obesity, type 2 diabetes, and inflammation. In centenarians, Akkermansia is often found in higher proportions, contributing to:

Gut Barrier Integrity: By degrading mucin, Akkermansia stimulates the host to produce more mucin, thereby strengthening the intestinal barrier and preventing the translocation of toxins and pathogens into the bloodstream [7].

Metabolic Health: It improves glucose metabolism, insulin sensitivity, and reduces fat mass, partly by interacting with endocannabinoid system and GLP-1 production [8].

Anti-inflammatory Effects: Akkermansia helps to modulate the immune system and reduce chronic low-grade inflammation, a key driver of aging.

Bifidobacterium spp.

Various species of Bifidobacterium are well-known probiotics and are also frequently enriched in the guts of centenarians. These bacteria are crucial for:

Immune Modulation: Bifidobacterium species play a significant role in training and modulating the immune system, contributing to a balanced inflammatory response [9].

SCFA Production: They are potent producers of SCFAs, particularly acetate, which can then be converted to butyrate by other bacteria, further supporting gut health and anti-inflammatory processes [10].

Pathogen Inhibition: Bifidobacterium can inhibit the growth of pathogenic bacteria through various mechanisms, including competition for nutrients and production of antimicrobial compounds.

Practical Takeaways for Nurturing a Longevity Microbiome

Cultivating a gut microbiome conducive to longevity involves dietary and lifestyle interventions:

  • Dietary Fiber Intake: Consume a diverse range of fiber-rich foods, including fruits, vegetables, whole grains, legumes, nuts, and seeds. Prebiotic fibers (e.g., inulin, FOS) specifically feed beneficial bacteria like Bifidobacterium [11].
  • Polyphenol-Rich Foods: Include foods rich in polyphenols, such as berries, dark chocolate, green tea, and colorful vegetables. Polyphenols act as prebiotics and have anti-inflammatory properties that benefit the gut microbiome [12].
  • Fermented Foods: Incorporate fermented foods like kimchi, sauerkraut, kefir, and yogurt (with live cultures) to introduce beneficial bacteria and their metabolites into the gut [13].
  • Avoid Unnecessary Antibiotics: Use antibiotics judiciously, as they can disrupt the delicate balance of the gut microbiome. When necessary, follow with probiotic supplementation.
  • Regular Exercise: Physical activity has been shown to positively influence gut microbiome diversity and composition [14].
  • Manage Stress: Chronic stress can negatively impact gut health. Implement stress-reduction techniques like mindfulness or meditation.

    • By actively shaping our gut microbiome through conscious dietary and lifestyle choices, we can foster an internal ecosystem that supports metabolic health, immune resilience, and ultimately, a longer, healthier life.

    References

    [1] Biagi, E., et al. (2016). Gut microbiota and extreme longevity. Current Opinion in Clinical Nutrition and Metabolic Care, 19(1), 17-22.

    [2] O'Toole, P. W., & Jeffery, I. B. (2015). Gut microbiota and healthy ageing. Current Opinion in Microbiology, 23, 38-42.

    [3] Vaiserman, A. M., et al. (2017). Gut microbiota and human longevity: Is there a link? Ageing Research Reviews, 35, 1-12.

    [4] O'Toole, P. W., et al. (2017). The gut microbiota of centenarians: a systematic review. Gut Microbes, 8(6), 579-591.

    [5] Ragonnaud, E., & Biragyn, A. (2021). The Gut Microbiota-Brain Axis in Action: From Disease to Therapy. Frontiers in Immunology, 12, 635223.

    [6] Rivière, A., et al. (2016). Bifidobacteria and butyrate-producing colon bacteria: importance for healthy gut function. Frontiers in Microbiology, 7, 979.

    [7] Everard, A., et al. (2013). Cross-talk between Akkermansia muciniphila and intestinal epithelium controls diet-induced obesity. Proceedings of the National Academy of Sciences, 110(38), 15416-15421.

    [8] Cani, P. D., & de Vos, W. M. (2017). Next-generation beneficial microbes: The case of Akkermansia muciniphila. Frontiers in Microbiology, 8, 1765.

    [9] O'Callaghan, A., & van Sinderen, D. (2016). Bifidobacteria and Their Role as Members of the Human Gut Microbiota. Frontiers in Microbiology, 7, 925.

    [10] Louis, P., et al. (2010). The role of butyrate in the gut. Gut, 59(11), 1569-1578.

    [11] Gibson, G. R., et al. (2017). Expert consensus document: The International Scientific Association for Probiotics and Prebiotics (ISAPP) consensus statement on the definition and scope of prebiotics. Nature Reviews Gastroenterology & Hepatology, 14(8), 491-502.

    [12] O'Keefe, S. J. D. (2019). Plant-based diets for the prevention and treatment of chronic diseases. Journal of Digestive Diseases, 20(1), 1-10.

    [13] Dimidi, E., et al. (2019). Fermented foods: Definitions and characteristics, impact on the gut microbiota and effects on gastrointestinal health and disease. Nutrients, 11(8), 1806.

    [14] Monda, V., et al. (2017). Exercise modifies the gut microbiota composition and diversity. Journal of Clinical Gastroenterology, 51(1), 1-8.