• 1.Department of Geriatric Medicine, The First Affiliated Hospital of China Medical University, Shenyang 110001, China;;
  • 2.Department of General Surgery, The First Affiliated Hospital of China Medical University, Shenyang 110001, China;
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Objective  To observe the effect of epidermal growth factor (EGF) on the proliferation, adhesion, invasiveness and the activation of nuclear factor-κB (NF-κB), matrix metalloproteinases (MMPs) expression and explore related mechanisms in pancreatic cancer cells.
Methods  Cell invasion assay, proliferation assay and adhesion assay were used to examine the proliferation, adhesion and invasiveness of pancreatic cancer cells, respectively. NF-κB activity was detected by electrophoretic mobility shift assay (EMSA), and MMPs protein and mRNA expressions were investigated by gelatin zymography, Western blot and reverse transcriptase-polymerase chain reaction (RT-PCR).
Results  EGF increased the invasiveness of pancreatic cancer cell in a dose-dependent manner (P<0.05), but did not affect cell proliferation or adhesion. The expressions of MMP-9 mRNA and protein significantly increased after induction by EGF and were highest when EGF concentration was 50 ng/ml, while there was no effect on the expressions of MMP-2 mRNA and protein. Furthermore, NF-κB activity increased with increased concentration of EGF in a concentration-dependent manner (P<0.05). In addition, NF-κB activity and the expressions of MMP-9 mRNA and protein by pretreatment with both pyrrolidine dithiocarbamate (PDTC) and EGF decreased when compared that by pretreatment with EGF alone. The invasiveness of pancreatic cancer cell by pretreatment with both PDTC and EGF decreased when compared that by pretreatment with EGF alone and nothing (P<0.05).
Conclusion  The findings indicate that the NF-κB-mediated MMP-9 induction is essential for EGF-induced invasiveness in pancreatic cancer cells, which can be inhibited by PDTC.

Citation: LIU Yu ,ZHANG Hao,YANG Ye,WANG Xin,LI Tiemin,GUO Renxuan. Epidermal Growth Factor-Mediated NF-κB Activity Induces Matrix Metalloproteinase-9 Expression and Invasion in Pancreatic Cancer Cell. CHINESE JOURNAL OF BASES AND CLINICS IN GENERAL SURGERY, 2009, 16(8): 603-608. doi: Copy