How Does Bacillus subtilis Regulate Gut Microbiota and Support Uric Acid Metabolism?

Introduction

Freeze-Dried Bacillus subtilis Powder is a probiotic ingredient prepared from Bacillus subtilis through advanced freeze-drying technology.

As a spore-forming probiotic strain, Bacillus subtilis exhibits excellent stability and resistance to environmental stress, including acid, bile, heat, and mechanical pressure.

Its spore structure enables it to better withstand harsh gastrointestinal conditions and maintain viability during intestinal transit, making it one of the highly stable probiotic ingredients for gut health and microbiome support applications.

Research Design

Published in Food Chemistry, this study combined multi-omics analysis and animal models to explore the biological functions of Bacillus subtilis.

The research highlights the potential role of Bacillus subtilis in regulating the gut–kidney axis through multiple pathways, including uric acid metabolism support, gut microbiota modulation, intestinal and renal homeostasis maintenance, and inflammatory balance regulation.

These findings provide scientific support for the development of Bacillus subtilis-based functional foods and dietary supplements targeting metabolic wellness.

Research Findings

In the hyperuricemia model, multiple metabolic indicators showed significant abnormalities. Following Bacillus subtilis supplementation, hepatic xanthine oxidase (XO) activity was effectively regulated, suggesting a potential role in supporting balanced uric acid metabolism.

Meanwhile, serum levels of uric acid, blood urea nitrogen (BUN), and creatinine showed a downward trend, with the effects demonstrating a dose-dependent response and gradual improvement toward normal physiological levels.

Histological analysis further revealed changes in tissue structure. Under high uric acid conditions, mice exhibited alterations including glomerular swelling, renal tubular expansion, intestinal villus damage, and inflammatory infiltration. After supplementation with freeze-dried Bacillus subtilis powder, improvements in renal structure and intestinal villus morphology were observed, suggesting enhanced intestinal and renal barrier homeostasis.

At the molecular level, Bacillus subtilis was associated with the regulation of renal urate transport pathways, including:

Downregulation of URAT1 and GLUT9, which are involved in urate reabsorption;

Upregulation of ABCG2, a transporter related to urate excretion.

In addition, Bacillus subtilis may help regulate inflammatory responses by modulating the TLR4/NF-κB signaling pathway, reducing the expression of inflammation-related factors such as IL-1β and TNF-α, and supporting intestinal and renal inflammatory balance.

Microbiota and enzyme activity analyses further demonstrated that Bacillus subtilis could contribute to gut ecosystem regulation by increasing beneficial bacteria associated with short-chain fatty acid (SCFA) production and improving microbial community balance.

Furthermore, enhanced intestinal urease activity may promote the breakdown of purine-related metabolites in the gut, supporting uric acid metabolism regulation and contributing to a balanced gut–kidney axis.

Research Summary

Overall, multiple studies and multi-omics analyses demonstrate that Freeze-Dried Bacillus subtilis Powder possesses key advantages, including high environmental tolerance, strong stability, and excellent probiotic viability.

Bacillus subtilis shows promising potential through multiple biological pathways, including:

Gut Microbiota Modulation:
Supports intestinal microbial balance and contributes to a healthier gut ecosystem.

Gut–Kidney Axis Support:
Helps maintain intestinal and renal barrier homeostasis through microbiota regulation and metabolic balance.

Uric Acid Metabolism Regulation:
Supports balanced uric acid metabolism by influencing related enzymatic activity and transport pathways.

Inflammatory Balance Support:
Helps regulate inflammation-related responses and maintain overall metabolic wellness.

With its excellent stability and functional potential, Bacillus subtilis is suitable for the development of metabolic health supplements, gut health products, and functional nutrition formulations.

References