MPO and Alzheimer disease: Immunostaining of kidney sections revealed stronger staining for myeloperoxidase (MPO), a neutrophil marker, and ionized calcium-binding adapter molecule 1 (Iba1), a macrophage marker, in the glomeruli of DNCB-induced AD-like model mice than in those of control mice, although the difference was not statistically significant (P = 0.3466).