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Abstract

Introduction: Type 2 diabetes mellitus (T2DM) is a metabolic disease that has led to a significant global public health burden.

Methods: In this work, we investigated the effects of Lacticaseibacillus rhamnosus Hao9 on T2DM in mice with high-fat diet- and streptozotocin (STZ)-induced diabetes (diabetic mice) and explored the underlying mechanisms.

Results: We found that 109 colony forming units (CFUs) of Hao9 per day significantly reduced fasting blood glucose and insulin levels (p < 0.001) in diabetic mice. Moreover, Hao9 enhanced liver antioxidant capacity and significantly decreased glucose-6-phosphatase and phosphoenolpyruvate carboxykinase expression in the livers of diabetic mice (p < 0.001). Hao9 also reduced the serum concentrations of pro-inflammatory cytokines such as tumor necrosis factor alpha (TNFα), interleukin-1β (IL1β), and IL6 (p < 0.05) and improved intestinal barrier function in diabetic mice. The composition of the gut microbiome was modulated by Hao9, with an increased abundance of Roseburia, Eubacterium, and Lacticaseibacillus, and decreased abundance of Escherichia/Shigella. Notably, Lacticaseibacillus was detected at both weeks 5 and 12 post-treatment, suggesting sustained colonization of the gut by Hao9.

Discussion: The supplementation of Hao9 improved gut microbiota, glucose metabolism, and insulin levels significantly in T2DM mice. That means Hao9 contributes to improving T2DM symptoms with its potential beneficial effects. Therefore, Hao9 is a promising dietary supplement for the treatment of T2DM.

Keywords: Lacticaseibacillus rhamnosus Hao9; gut microbiota; liver ROS; serum inflammatory factors; type 2 diabetes mellitus.

Research Insights

SupplementHealth OutcomeEffect TypeEffect Size
Lacticaseibacillus rhamnosusImproved Gut Microbiome CompositionBeneficial
Large
Lacticaseibacillus rhamnosusImproved Intestinal Barrier FunctionBeneficial
Moderate
Lacticaseibacillus rhamnosusImproved Liver Antioxidant CapacityBeneficial
Large
Lacticaseibacillus rhamnosusReduced Fasting Blood Sugar LevelsBeneficial
Large
Lacticaseibacillus rhamnosusReduced Insulin LevelsBeneficial
Large
Lacticaseibacillus rhamnosusReduced Pro-Inflammatory CytokinesBeneficial
Moderate

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