AGAP1 and nonpapillary renal cell carcinoma: Thus, based on a previous circRNA microarray and quantitative real-time polymerase chain reaction (qRT-PCR) in ccRCC tissues, we found for the first time that the expression of circAGAP1 (circ0058792), which is located in exons 2 to 6 of the AGAP1 gene, is upregulated in ccRCC and participates in tumorigenesis by regulating proliferation, migration, invasion and apoptosis.