IL2 and nasopharyngeal carcinoma: Ye et al. (2014) reported that exosomes from nasopharyngeal carcinoma (NPC) cells hindered the proliferation of T cells and the differentiation of Th1 and Th17 cells by reducing the level of interleukin-2 (IL-2), interferon gamma (IFN-γ), and interleukin-17 (IL-17).