MT-RNR1 and nonpapillary renal cell carcinoma: ZNF582-AS1 overexpression inhibits cell proliferative, migratory and invasive ability and promotes cell apoptosis in ccRCC through suppressing the N(6)-methyladenosine modification of MT-RNR1, resulting in the decrease of MT-RNR1 expression, followed by the decrease of MT-CO2 protein.