Fig. 6

CHD1L promotes the expression of PD-L1 in cutaneous squamous cell carcinoma cells in a hypoxic environment and promotes M2 polarization in TAMs through exosomes. (A) p-PI3K, p-AKT, and PD-L1 protein bands and relative protein expression levels in A431 cells; (B) CD9, TSG101, and PD-L1 protein bands and protein expression levels in exosomes; (C) CD206, Arginase-1, iNOS, IL-1β, p-AKT, p-mTOR, VEGF, COX-2, MMP2, MMP9, and p-ERK1/2 protein bands and relative protein expression levels in tumor-associated macrophages. GAPDH as control protein; Data are expressed as mean ± standard deviation; N = 3; **P < 0.01.