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Intestinal trefoil factor (ITF), a member of the trefoil factor family, is a “Super-protective factor” for intestinal mucosal protection. This study was designed to explore the mechanism by which ITF promotes intestinal epithelial cell migration. Intestinal epithelial cells were treated with the human ITF (hITF). Phospho-ERK, phospho-STAT3 Tyr 705 , and phospho-STAT3 Ser 727  levels were detected at different time points by western blot. To assess the potential crosstalk between the ERK and JAK/STAT3 pathways, HT-29 cells were treated with the MEK-inhibitor, U0126, and phosphor-STAT3 levels were evaluated. Conversely, cells were treated with the JAK-inhibitor, AG490, and ERK-activity was evaluated. Transwell assay was performed to investigate the effect of the crosstalk on the cell motility.  MMP-2  and  MMP-9  transcription was analyzed by quantitative real-time PCR. E-cadherin degradation was detected by immunofluorescence. Our results indicate that hITF simultaneously activated the ERK and JAK/STAT3 pathways and a crosstalk was detected between the two pathways. hITF increased cell migration. This effect was abolished by U0126 and AG490 treatment. hITF increased  MMP2  and  MMP9  mRNA levels and E-cadherin degradation and U0126 and AG490 abolished this effect of hITF. In conclusion, the hITF-induced crosstalk between the ERK and JAK/STAT3 pathways is associated with intestinal epithelial cell migration.

ITF promotes migration of intestinal epithelial cells through crosstalk between the ERK and JAK/STAT3 pathways