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Rheumatoid arthritis (RA) carries significant risk for atherosclerotic cardiovascular disease (ASCVD). Traditional ASCVD risk factors fail to account for this accelerated atherosclerosis. Shared inflammatory pathways are fundamental in the pathogenesis of both diseases. Considering the impact of RA in increasing cardiovascular morbidity and mortality, the characterization of therapies encompassing both RA and ASCVD management merit high priority. Despite little progress, several drugs discussed here promote remission and or lower rheumatoid disease activity while simultaneously conferring some level of atheroprotection. Methotrexate, a widely used disease-modifying drug used in RA, is associated with significant reduction in cardiovascular adverse events. MTX promotes cholesterol efflux from macrophages, upregulates free radical scavenging and improves endothelial function. Likewise, the sulfonamide drug sulfasalazine positively impacts the lipid profile by increasing HDL-C, and its use in RA has been correlated with reduced risk of myocardial infraction.
DMARDs | ||
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Name of Drug | Mechanism of Action | |
Anti-rheumatic Properties | Atheroprotective Properties | |
Methotrexate | Inhibits dihydrofolate reductase and several immune pathways involved in purine and pyrimidine synthesis. |
Enhances macrophage cholesterol efflux and prevents foams cell differentiation and activation. Upregulates free radical scavenging; improves endothelial function. |
Sulfasalazine | Reduces production of inflammatory cytokines, likely through inhibition of NF-κB activation. |
Prevents arachidonic acid-mediated platelet aggregation, decreases adhesion of monocytes and leukocytes, and increases HDL-C. |
Hydroxychloroquine | Interferes with toll-like receptor signaling, reduces calcium signaling in B and T cells and matrix metalloprotease activity | Positively impacts insulin sensitization, promotes anti-atherogenic lipid profile. Anti-thrombotic and anticoagulant properties. |
Tumor Necrosis Factor (TNF)-α Inhibitors | ||
Etanercept Infliximab Adalimumab |
Biologics that inactivate TNF-α. Etanercept is a fusion protein of human immunoglobulin 1 Fc domain and TNF-α receptor. Infliximab is a mouse-human chimeric anti-human TNF-α antibody Adalimumab is a human anti-human TNF-α antibody |
TNF-α promotes numerous inflammatory responses associated with atherosclerosis, including induction of vascular adhesion and monocyte/macrophage proliferation. TNF-α impacts lipid metabolism by stimulating liver triglyceride production. |
IL-6 Inhibitors | ||
Tocilizumab | Inhibits IL-6 which contributes to inflammation and antibody production through its action on T cells, B cells, monocytes and neutrophils |
Decreases inflammatory proteins such as serum amyloid A, and restores the anti-atherogenic function of HDL by increasing HDL cholesterol efflux capacity. |
JAK Kinase Inhibitors | ||
Tofacitinib | Small molecules that target the JAK-STAT signaling pathway. Reduce expression of cytokine related genes. | Risk of adverse cardiovascular events still being evaluated. Many studies show no difference compared to placebo or biologic |
Upadacitinib | More JAK1 selective |