THE GUT-HEART-JOINT AXIS: MICROBIOME-MEDIATED MECHANISMS IN RHEUMATOID ARTHRITIS AND CARDIOVASCULAR DISEASE
Main Article Content
Keywords
gut-heart-joint axis, rheumatoid arthritis, cardiovascular disease, gut microbiota, immunological crosstalk.
Abstract
Rheumatoid arthritis (RA) is a chronic autoimmune disease primarily affecting joints, but its impact extends beyond the synovium. Notably, RA confers a 1.5–2-fold higher risk of cardiovascular disease (CVD), including accelerated atherosclerosis. Emerging evidence implicates the gut microbiome as a pivotal mediator in this triad, forming a “gut-heart-joint axis.” This review synthesizes current knowledge on how intestinal dysbiosis and microbial metabolites contribute to RA pathogenesis and heightened CVD risk. We discuss key microbiome-mediated pathways – from impaired gut barrier function and immune cell trafficking to molecular mimicry and proinflammatory metabolites – that link RA and CVD pathophysiology. We highlight diagnostic implications, such as distinct gut microbiota signatures in preclinical RA and potential microbial or metabolic biomarkers for CVD risk stratification.
A balanced overview of treatment strategies is provided, encompassing conventional RA therapies (DMARDs and biologics) that incidentally modulate the microbiome, as well as emerging interventions targeting dysbiosis (dietary fiber, probiotics, and even fecal microbiota transplantation). Throughout, we emphasize clarity for the general medical professional, reviewing immunological crosstalk (e.g. Th17 cells, cytokines) in approachable terms. The gut-heart-joint axis paradigm offers a unifying framework that not only enhances our understanding of RA’s systemic nature but also uncovers novel avenues for diagnosis and therapy aimed at improving both joint and cardiovascular outcomes. By integrating microbiome science with clinical rheumatology and cardiology, this review outlines a path toward precision medicine approaches that could mitigate inflammation and comorbidity in RA.
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