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