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(A) High ETAR expression in tubular epithelium, glomerulus, and renal interstitium (chronic inflammatory cells and stromal fibroblasts) (200×, hematoxylin). (B) ETAR expression predominantly located in tubular epithelium (100×, hematoxylin). (C) ETAR immunoreactivity in endothelial cells of artery with focal expression in tubular epithelium (600×, hematoxylin). (D) High ETAR expression in tubular epithelium with immunoreactivity in endothelial cells (400×, hematoxylin).
