GDNF and neoplasm: A previous study demonstrated that circFOKX2 not only interacts with YBX1 and hnRNPK to elevate the expression of the oncogenes NUF2 and PDXK but also functions as a sponge for miR-942 to upregulate the expression of ANK1, GDNF, and PAX6, which contribute to tumor progression in PDAC [25].