Tumor necrosis factor (TNF)-alpha-inducing protein (Tip alpha) is a newly identified carcinogenic factor secreted by Helicobacter pylori (H.pylori). Although it has been proved that Tipa is a strong inducer of epithelialmesenchymal transition (EMT), a crucial process of migration, the exact molecular mechanism is unknown. Current evidence indicates that the oncogenic transcription factor signal transducers and activators of transcription 3 (STAT3) is inappropriately activated in multiple malignancies, including gastric cancer. In this study, we showed that Tipa significantly down-regulated the...