P2RX1 and papillary renal cell carcinoma: The potential lncRNA of hsa-let-7d-5p and hsa-let-7e-5p/P2RX1 axis was STAG3L5P-PVRIG2P-PILRB, which has been reported to be up-regulated in renal papillary cell carcinoma and may be associated with poor prognosis [25].