Yang et al. found that OLP T-Exo induced increased expression of macrophage inflammatory protein (MIP)-1α/β, IL-10, and IL-17A thereby affecting cytokine secretion by T cells, and that MIP-1α/β may drive CD8+ T cell trafficking after binding to CCR1/5 in OLP, contributing to the development of OLP [79]. Here, CCL3 is linked to oral lichen planus.