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To study the carcinogenetic mechanism of HOXB7 in gastric cancer (GC) remains.  Two human GC cell lines - SGC7901 and SNU1 - were used for this study. SGC7901 cells were transfected with siRNA-HOXB7 (siHOXB7) to knock down HOXB7 expression, whereas, SNU1 cells were transduced with pCDNA3.1-HOXB7 to overexpress HOXB7. After transfection, cancer progression was assessed by determining cell proliferation, wound-healing process, cell cycle, apoptosis, invasion, and migration. The effect of HOXB7 on epithelial-mesenchymal transition (EMT) was measured by observing changes in F-actin cytoskeleton and evaluating the expression of EMT markers. p-Scr and p-FAK were evaluated to assess the mechanism.  Knockdown of HOXB7 suppressed cell proliferation, alleviated the wound-healing process, inhibited cell migration and invasion, and arrested the cell cycle while promoting cell apoptosis, suggesting the tumor-suppressive effect of siHOXB7 in human GC cells. On the contrary, HOXB7 overexpression showed a tumor-promoting effect on human GC cells. Moreover, we confirmed an inhibitory effect of siHOXB7 on the EMT process by preventing epithelial cells from acquiring a mesenchymal phenotype and downregulating mesenchymal markers (vimentin, β-catenin, N-cadherin, Twist) while upregulating epithelial markers (E-cadherin). Our data revealed that HOXB7 was associated with Src/FAK and favored the activation of the Src-FAK pathway in human GC cells.  HOXB7 accelerated the malignancy of GC, by facilitating EMT and regulating the Scr-FAK pathway.

oncotargets and therapy

&lt;p&gt;Homeobox B7 accelerates the cancer progression of gastric carcinoma cells by promoting epithelial–mesenchymal transition (EMT) and activating Src–FAK pathway&lt;/p&gt;