Variations in diet cause alterations in microbiota and metabolites that follow changes in disease severity in a...

Area of Science:

• Neuroimmunology
• Microbiome Research
• Metabolic Studies

Background:

• Multiple sclerosis (MS) is a central nervous system disorder characterized by immune-mediated myelin destruction.
• Dietary interventions have previously shown to alter the disease course in preclinical models of MS.
• Gut microbiota and host metabolism are known to interact and influence immune responses.

Purpose of the Study:

• To investigate the impact of different diets on gut microbiota and serum/fecal metabolites in a preclinical model of MS (EAE).
• To identify specific microbial and metabolic changes associated with disease severity.
• To evaluate the therapeutic potential of Lactobacillus paracasei in mitigating EAE.

Main Methods:

• Mice with experimental autoimmune encephalomyelitis (EAE) were fed either an irradiated or autoclaved diet.
• Stool and serum samples were analyzed for microbiota composition and metabolite profiles.
• Therapeutic administration of Lactobacillus paracasei was performed in EAE mice.

Main Results:

• The genus Lactobacillus was inversely correlated with EAE severity.
• Treatment with Lactobacillus paracasei significantly reduced disease incidence, clinical scores, and weight loss in EAE mice.
• Diet-induced differences in EAE severity were associated with alterations in glycolysis and the tricarboxylic acid cycle.

Conclusions:

• Diet, gut microbiota, and host metabolism are interconnected and influence disease progression in the EAE model.
• Lactobacillus paracasei demonstrates therapeutic potential for reducing disease severity in MS.
• Further research into these metabolic interactions may offer translational relevance for MS patients.