NGF and bladder transitional cell carcinoma: A downregulation of NGF was observed in the tumor tissues of BLCA, BRCA, CESC, COAD, KICH, KIRP, LIHC, PRAD, and UCEC, while NGFR was downregulated in BLCA, BRCA, CHOL, COAD, KIRP, LIHC, LUAD, PRAD, READ, STAD, and UCEC (Figure 8A).