We then explored GLUD1 expression in ccRCC separately in the UALCAN, and it was clear that GLUD1 mRNA (Fig. 1c) and protein (Fig. 1d) expression showed a decreasing trend in tumor tissues, and these results suggest that GLUD1 may be a suppressor factor in most tumors, including ccRCC. Here, GLUD1 is linked to nonpapillary renal cell carcinoma.