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There is no cure for rheumatoid arthritis affecting over 1% of the world population between 35 e 65 years old suffering chronic inflammation causing pain, swelling, stiffness, degeneration e joint deformities. Disease-modifying anti-rheumatic drugs (DMARDs) are expensive e immunosuppressive, increasing the risk of severe infections e malignancies. Here, we analyzed the potential of the vagus nerve to control experimental arthritic inflammation. Our results indicate that the afferent vagus nerve controls arthritic joint inflammation by activating specific sympatho-excitatory brain areas, such as the paraventricular hypothalamic nucleus (PVN) e the locus coeruleus (LC). PVN or LC stimulation decreased articular inflammation, but only LC integrity was necessary for vagal control of arthritic inflammation. Cortical electrical stimulation above the parietal cortex activated LC e PVN, mimicked vagal activation but induced a better control of arthritic joint inflammation. These results suggest a neuroimmune brain map to control side-specific lateral arthritic joint inflammation without noticeable side effects.

Estimulação vagal aferente e transcraniana reduzem a inflamação articular por meio de um arco neural central similar dependente do aumento da atividade simpática: o papel fundamental do lócus cerúleos