High Salt Diet Impact on MS

The influence of sodium intake on autoimmune diseases, particularly Multiple Sclerosis (MS), has garnered significant attention due to its potential role in exacerbating disease activity. Various studies have implicated high-salt diets (HSD) in the pathogenesis of MS, highlighting the link between sodium consumption and immune dysregulation. Mechanistically, elevated salt levels promote the differentiation of pro-inflammatory T helper (Th) 17 cells while compromising the function of regulatory T cells (Tregs), fostering an environment conducive to autoimmunity. Additionally, sodium intake has been associated with the expansion of monocytes and alterations in cytokine profiles, further exacerbating inflammatory responses. However, recent research has provided contrasting findings regarding the direct impact of long-term dietary salt intake on cytokine concentrations in humans. Despite this, animal studies have demonstrated that high sodium intake exacerbates experimental autoimmune encephalomyelitis (EAE), a model for MS, through modulation of gut microbiota and enhancement of Th17 cell differentiation. Notably, the depletion of Lactobacillus species in the gut microbiome due to high salt consumption has been identified as a potential contributing factor to the development of autoimmunity. Understanding the intricate interplay between sodium intake, immune responses, and gut microbiota may pave the way for novel therapeutic strategies to mitigate the detrimental effects of high salt consumption on autoimmune diseases like MS.