Introduction
PsA, inflammation, Psoriatic arthritis
INFLAMMATION, PSORIATIC ARTHRITIS, INFLAMMATORY DISEASE, PERSISTENT INFLAMMATION
Psoriatic arthritis (PsA) is a complex inflammatory disease affecting peripheral and axial joints, entheses, and tendons, as well as skin and nails [Interleukin (IL)-23 is an upstream regulatory cytokine that modulates the development of IL-17-producing T cell populations, including, for example T helper (Th)-17 cells, and innate lymphoid cells, key effectors of inflammation in the skin and synovium, and consequently, of joint damage in PsA [Given the association between persistent inflammation and joint damage in PsA [