"Real-time PCR and dual-luciferase assay indicated that KLF9 directly inhibited MMP28 transcription. Decreased invasion and metastasis capability of GC cells caused by ectopic KLF9 expression could be rescued via reinforcing MMP28 expression in vivo. Collectively our study indicates that KLF9 significantly suppresses GC cell invasion and metastasis through inhibiting MMP28 transcription."xsd:string