Unlocking the Gut⁢ Microbiome:⁤ AI Deciphers Bacterial Sweet ⁤Tooth for personalized Probiotics

New research leverages artificial intelligence to map the complex carbohydrate diets of gut bacteria,paving⁢ the way for highly targeted probiotic⁤ therapies.

When‍ we consume ⁢food, a significant portion of dietary carbohydrates, especially complex fibers, bypass human digestion. Rather, these undigested sugars journey to⁤ the large intestine, ‍where they become ⁢a vital food source for the trillions of bacteria residing⁤ there.Understanding which bacteria thrive on which carbohydrates is crucial for harnessing the power of our gut‍ microbiome for improved health.

A groundbreaking ⁢study, led by⁤ Arzamasov, has taken a significant leap forward in this understanding. The research⁤ team meticulously reconstructed 68 metabolic pathways ‍that dictate a bacterium’s ability to‍ digest specific carbohydrates. This was achieved through ‍a rigorous process involving the manual analysis‍ of 263 Bifidobacterium genomes, complemented ⁤by data from hundreds of previously published studies.

Building upon this foundational work,⁤ the ⁣scientists employed artificial intelligence to expand their insights. An AI-based model was trained on this extensive dataset to analyse over 2,800 additional genomes. This powerful tool can‍ now ⁣predict a⁢ bacterium’s capability to metabolize each of⁤ the 68 identified glycans, essentially mapping out their “sweet tooth.”

To validate their predictions,the⁤ researchers put their AI model to the test.They observed the growth of 30 geographically diverse⁤ Bifidobacterium strains when exposed to 43 different carbohydrates, aligning with the⁢ predicted utilization pathways. The ‍results were remarkably accurate, with the AI’s⁤ predictions of bacterial growth ⁢achieving an notable success rate of over 94 percent when compared to actual observed growth.The study also revealed fascinating variations in carbohydrate utilization ‍patterns, influenced by factors such as geographic location, diet, and lifestyle. ⁣Notably, Bifidobacterium strains isolated from Bangladeshi children exhibited unique characteristics.These strains demonstrated ⁤a remarkable capacity to digest both human milk carbohydrates and plant fibers. The researchers ⁢suggest this adaptability may reflect an evolutionary response ‍to dietary ⁢shifts as infants transition from milk to solid foods.

“We found that these Bangladeshi isolates have unique gene clusters ⁢and unique metabolic phenotypes not found in any other genomes of ⁣strains‍ isolated from other parts of the world,” stated Arzamasov. “This reinforces the importance of ⁤studying the ⁤gut microbiomes in understudied ⁤populations around the world in a culturally sensitive way, as they have unique biological diversity which is currently underappreciated.”

By illuminating how carbohydrate metabolism strategies differ across and⁢ within Bifidobacterium species, and how these strategies are shaped by ecological factors like host age, diet, ⁢and lifestyle, Osterman, Arzamasov, and their colleagues have ⁤created an invaluable resource. This thorough “encyclopedia of sugar utilization pathways” offers a critical foundation for future research and the ⁣development of personalized probiotic‍ interventions.”With this encyclopedia of sugar utilization pathways in hundreds ⁣of⁢ strains with sequenced genomes, you can now confidently predict ⁢what⁤ are the nutrients that ⁤support their growth and what are the nutrients that do not support their ⁢growth,” explained Osterman, the senior and co-corresponding author of the study. “In addition to a‍ compendium of hundreds of already known bacterial isolates, we built a tool that can be used to provide the same⁤ type of⁣ predictions for ⁢thousands and thousands more.”

This newfound knowledge⁤ holds immense potential for practical applications. “You can use this knowledge to‍ select the strains as probiotic⁢ candidates for a given situation,” Arzamasov added. “And you can define very precisely what ⁤nutrients woudl support ⁢these probiotic strains to guide the rational development of supplementary foods to make them even more effective.”

This research marks a⁢ significant step towards a future ⁢where gut health interventions are precisely tailored to individual needs, leveraging the power of‍ AI⁤ to ⁢unlock‍ the ‍secrets of our⁣ microbial partners.

source:

arzamasov, aa, et ⁤al. (2025). Integrative genomic reconstruction reveals heterogeneity ⁤in carbohydrate utilization‍ across human gut bifidobacteria. Nature Microbiology*. doi.org/10.1038/s41564-025-02056-x