CD4 and atopic eczema: Some animal experiments investigated the anti-inflammatory effect of Qingpeng ointment in atopic dermatitis-like murine model, and they revealed that Qingpeng ointment could not only inhibit the infiltration CD4+ T cells and mast cells in the dermis of the lesion but also suppress the production of IL-4 and the mRNA expression of IL-17A in tissue, while the levels of IFN-γ and TNF-α in tissue were increased [45, 46].