Research is exploring the complex role of TGF-β signaling in the biology of Treg and Th17 cells, with implications for understanding and treating various diseases. The relationship between Treg and Th17 cells is being studied in the context of conditions such as systemic lupus erythematosus, uveitis, colitis, and diabetes mellitus. The findings suggest that TGF-β signaling plays a critical role in regulating the balance between these cell types, which may have significant implications for therapy and treatment.