T helper cell subsets in the development of atopic dermatitis.

The pathogenesis of atopic dermatitis (AD) requires the orchestration of multiple immune cells that mediate inflammation and tissue remodeling in the skin. T helper cell subsets that secrete specific cytokines have a central role in regulating the inflammatory process. In this review we discuss defined roles for T helper subsets in AD, how the microbiome might impact the development and function of T helper subsets, and animal models that will be useful for testing hypotheses on the interactions of a polarized T-cell response with skin inflammation. Future studies that link these areas will provide important insight into the development of skin inflammation and AD.