TNPO3 and gastric cancer: Circ-hHBB3 binds HuR and degrades HuR, whereas Circ-TNPO3 competitively binds IGF2BP3 and inhibits the proliferation and metastasis of gastric cancer by regulating the MYC-SNAIL axis, which leads to malignant progression of GC (Yu et al., 2021).