T helper 17 differentiation pathway components (Th17 pathway)

The T helper 17 (Th17) differentiation pathway components represent a complex network of cytokines, receptors, and transcription factors responsible for the development and effector functions of Th17 cells. Key components include the master transcription factor ROR-gamma-t, the signaling protein STAT3, and cytokines such as IL-6, IL-23, and TGF-beta which drive differentiation, as well as IL-17A, IL-17F, and IL-22 which mediate the downstream inflammatory response. This pathway is essential for host defense against extracellular bacteria and fungi at mucosal surfaces but is frequently dysregulated in autoimmune and chronic inflammatory diseases. Therapeutic strategies targeting this pathway include monoclonal antibodies that neutralize IL-17 or IL-23, and small molecule inhibitors targeting JAK kinases or ROR-gamma-t. While highly effective in treating conditions like psoriasis and spondyloarthritis, modulation of this pathway requires careful monitoring due to the increased risk of specific opportunistic infections and potential impacts on intestinal barrier integrity.

Other names

Th17 cell differentiationIL-17 signaling pathwayROR-gamma-t signalingIL-23/IL-17 axis

Inhibition of Th17-promoting cytokines (IL-23, IL-6), blockade of Th17-produced cytokines (IL-17A, IL-17F), or inhibition of intracellular signaling molecules (JAK/STAT, ROR-gamma-t) to prevent Th17 cell expansion and pro-inflammatory activity.