CCL20 and diabetic kidney disease: In human DKD, CCL20 was found mainly expressed in an injured population of proximal tubular cells expressing VCAM (PTVCAM) and the tubular injury marker HAVCR1/KIM-1, as well as by parietal epithelial cells (PECs), which were at a much lower proportion and displayed negligible or barely detectable CCL20 expression in control human kidneys [20,21] (Figure 6A).