Beyond this, a previously published article by Weyland et al. on the involvement of PD-L1/PD-1 pathway in blood vessel inflammatory disease has mainly focused on detailing the role of PD-L1lo-expressing DCs in a vasculitis (for example, Giant cell arteritis (GCA)) and PD-L1hi-expressing macrophages in chronic inflammation disease (example, CAD). This evidence concerns the gene CD274 and temporal arteritis.