As cytokines secreted by activated immune cells such as macrophages and T cells could play important roles in the development of SLE, we treated PEMs with various cytokines and supernatants from anti‐CD3/anti‐CD28‐activated CD8+ T cells (CD8+ T C.M) to screen which factors could reduce EBI2 expression. Here, CD8A is linked to systemic lupus erythematosus.