When the normal alveolar macrophages were transferred or the higher levels of CCL24 were neutralized, the frequency and number of γδT cells (Fig. 6b,c and Supplemental Fig. 7), particularly IL-17A + γδT cells (Fig. 6d), significantly increased in the lungs of the Abt mice after challenged with B16/F10 melanoma cells. This evidence concerns the gene IL17A and melanoma.