STAT3 and gastric cancer: YAP1 activation via epithelial-mesenchymal transition (EMT)-related transcriptional pathways are modulated by circRPL15, which sequesters miR-502-3p from OLFM4 mRNA and activates the STAT3 pathway, leading to enhanced GC tissue growth, increased cell motility, invasion and reduced apoptosis (Li Y. et al, 2020).