Type 2 inflammation and sensory neurons: bidirectional cross talk. Stimulated neurons produce neuropeptides that can modulate the activity of immune cells, including the production of inflammatory mediators that can directly affect sensory neurons. IL-13Rα1, IL-13 receptor-α 1; IL-31RA, IL-31 receptor A; IL-33R, IL-33 receptor; MrgprCr11, Mas-related family of G protein-coupled receptor 11; MRGPRX1, Mas-related family of G protein-coupled receptor X1; Nav, voltage-gated sodium channel; NMU, neuromedin U; PAR2, protease activated receptor 2; TSLPR, thymic stromal lymphopoietin receptor.