IL17F and leprosy: Recently, the expression of cytokines related to Treg cell profile was evaluated by quantitative PCR in 87 skin biopsies from leprosy patients and showed decreased Treg cells markers in T1R and increased IL-17F, CCL20 and IL-8 in T2R when compared to the respective non-reactional leprosy patients [18].These apparently conflicting results are difficult to be compared may reflect the different methodological approaches and comparison groups used.