We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Deciphering Microbiome, Transcriptome, and Metabolic Interactions in the Presence of Probiotic Lactobacillus acidophilus against Salmonella Typhimurium in a Murine Model
Summary
Researchers tested whether the probiotic Lactobacillus acidophilus could protect mice against Salmonella Typhimurium infection by examining changes in gut bacteria, gene expression, and metabolic pathways. They found that probiotic treatment improved gut microbial balance, reduced harmful bacterial load, and modulated immune and metabolic responses. The study suggests that probiotics may offer a promising alternative strategy to antibiotics for managing certain foodborne bacterial infections.
Salmonella enterica serovar Typhimurium (S. Typhimurium), a foodborne pathogen that poses significant public health risks to humans and animals, presents a formidable challenge due to its antibiotic resistance. This study explores the potential of Lactobacillus acidophilus (L. acidophilus 1.3251) probiotics as an alternative strategy to combat antibiotic resistance associated with S. Typhimurium infection. In this investigation, twenty-four BALB/c mice were assigned to four groups: a non-infected, non-treated group (CNG); an infected, non-treated group (CPG); a group fed with L. acidophilus but not infected (LAG); and a group fed with L. acidophilus and challenged with Salmonella (LAST). The results revealed a reduction in Salmonella levels in the feces of mice, along with restored weight and improved overall health in the LAST compared to the CPG. The feeding of L. acidophilus was found to downregulate pro-inflammatory cytokine mRNA induced by Salmonella while upregulating anti-inflammatory cytokines. Additionally, it influenced the expression of mRNA transcript, encoding tight junction protein, oxidative stress-induced enzymes, and apoptosis-related mRNA expression. Furthermore, the LEfSe analysis demonstrated a significant shift in the abundance of critical commensal genera in the LAST, essential for maintaining gut homeostasis, metabolic reactions, anti-inflammatory responses, and butyrate production. Transcriptomic analysis revealed 2173 upregulated and 506 downregulated differentially expressed genes (DEGs) in the LAST vs. the CPG. Functional analysis of these DEGs highlighted their involvement in immunity, metabolism, and cellular development. Kyoto Encyclopedia of Genes and Genome (KEGG) pathway analysis indicated their role in tumor necrosis factor (TNF), mitogen-activated protein kinase (MAPK), chemokine, Forkhead box O (FOXO), and transforming growth factor (TGF-β) signaling pathway. Moreover, the fecal metabolomic analysis identified 929 differential metabolites, with enrichment observed in valine, leucine, isoleucine, taurine, glycine, and other metabolites. These findings suggest that supplementation with L. acidophilus promotes the growth of beneficial commensal genera while mitigating Salmonella-induced intestinal disruption by modulating immunity, gut homeostasis, gut barrier integrity, and metabolism.
Sign in to start a discussion.
More Papers Like This
Effects of mixed lactic acid bacteria on intestinal microbiota of mice infected with Staphylococcus aureus
Researchers found that infection with Staphylococcus aureus, a common harmful bacterium, disrupts the normal balance of gut microbiota in mice, but that treatment with a mix of beneficial lactic acid bacteria (LAB) — similar to probiotics — helped prevent the infection and restore a healthier gut microbial community. This highlights the potential of probiotic bacteria to protect gut health against pathogenic disruption.
A probiotic for preventing microplastic toxicity: Clostridium dalinum mitigates microplastic-induced damage via microbiota-metabolism-barrier interactions
Using metagenomics and metabolomics, this study found that the probiotic bacterium Clostridium dalinum reduced microplastic-induced gut damage in mice by modulating gut microbiota composition, metabolic pathways, and intestinal barrier integrity.
Gut microbiota and liver metabolomics reveal the potential mechanism of Lactobacillus rhamnosus GG modulating the liver toxicity caused by polystyrene microplastics in mice
Researchers found that the probiotic Lactobacillus rhamnosus GG helped protect mice from liver damage caused by polystyrene microplastic exposure. The probiotic worked by restoring healthy gut bacteria and normalizing liver metabolic pathways disrupted by the microplastics. The study suggests that supporting gut health through beneficial bacteria may help mitigate some of the toxic effects microplastics have on the liver.
Gut microbiota remodeling drived by dietary millet protein prevents the metabolic syndrome
Researchers found that millet bran protein extract prevented metabolic syndrome in high-fat diet mice by remodeling gut microbiota and reducing obesity, chronic inflammation, and insulin resistance. The protective effects were linked to specific gut microbial metabolites influenced by dietary millet protein.
Lactobacillus plantarum reduces polystyrene microplastic induced toxicity via multiple pathways: A potentially effective and safe dietary strategy to counteract microplastic harm
Researchers found that Lactobacillus plantarum, a probiotic bacterium commonly found in fermented foods, can reduce the harmful effects of polystyrene microplastics in mice through multiple pathways. The bacteria worked by binding directly to plastic particles to help remove them from the body, reducing oxidative damage, repairing the intestinal barrier, and regulating bile acid metabolism. This suggests that certain probiotics could be a safe dietary strategy to help counteract some of the negative health effects of microplastic exposure.