Furthermore, we found a positive relationship between AHR and PD-L1 (CD274) expressions in breast cancer patients, particularly in those with basal-like breast cancer (Fig. 6d), which is a subtype of TNBC.50 These findings support the connection between AHR and PD-L1 in the mouse lung PMN of breast cancer. The gene discussed is CD274; the disease is breast carcinoma.