T-helper type 2 cell differentiation pathway (Th2 cell differentiation)

The T-helper type 2 cell differentiation pathway refers to the signaling and transcriptional events that cause naive CD4+ T cells to adopt the Th2 cell phenotype. This process is triggered primarily by exposure to interleukin-4 (IL-4), which activates the transcription factor STAT6; in turn, STAT6 upregulates GATA3, the master regulator of Th2 differentiation[2][3][4]. GATA3 orchestrates epigenetic and gene expression changes at cytokine loci, driving the production of Th2 signature cytokines IL-4, IL-5, and IL-13. Th2 differentiation contributes to immune responses against helminths and extracellular bacteria, but excessive or misregulated Th2 activity is implicated in allergies, asthma, and some autoimmune diseases[2][3][7]. Drugs or biologics may be designed to alter Th2 differentiation by targeting pathway cytokines or transcription factors in relevant diseases, but "Th2 cell differentiation pathway" itself is not a druggable single molecular entity.

Other names

Th2 differentiation pathwayTh2 polarization pathwayT-helper 2 cell lineage commitment