CD4 and diabetic kidney disease: Box plots of cell infiltration showed higher levels in the infiltration of activated DCs, conventional DCs, CD4+ Tem (effective memory T Cell), epithelial cells, keratinocytes, macrophages, macrophages M1, memory B-cells, and MEP (megakaryocyte–erythrocyte progenitors) in the glomeruli of diabetic nephropathy than in the healthy controls (P < 0.05).