ABSTRACT
Objective:To explore if there was a correlation between TNFAIP8 and gastric tumor drug resistance. Methods:We collected 47 cases of neoadjuvant chemotherapy,and detected the expression of TNFAIP8 in their tissues before and after surgery by im-munohistochemistry. Compared the expression of TNFAIP8 between SGC7901 cell and its cisplatin resistance cell SGC7901-DDP by Western blot,and then we used siRNA technology to decreased its expression,continued to test the susceptibility to cisplatin through MTT. Results:The expression of TNFAIP8 between pre-neoadjuvant and after-neoadjuvant had no difference, but the expression of chemotherapy effectiveness was lower than chemotherapy invalidness(P<0. 05);the expression of SGC7901-DDP cell was also higher than SGC7901 cell; the expression of TNFAIP8 decreased apparently through plasmid transfection of SGC7901-DDP cell, MTT test showed the fewer expression of TNFAIP8 could increase the susceptibility to cisplatin(P<0. 05). Conclusion: TNFAIP8 was involved in chemotherapy resistance of gastric carcinoma.
ABSTRACT
Objective To investigate the expression and clinicopathological significance of metastasis-associated 1 (MTA1), matrix metalloproteinase-9 (MMP-9) and vascular endothelial growth factor-C (VEGF-C) in a gastric adenocarcinoma.Methods The expressions of MTA1, MMP-9, and VEGF-C were detected with immunohistochemical method in 120 cases of gastric adenocarcinoma tissues and 30 cases of normal gastric tissues.Results The positive percentage of MTA1, MMP-9, and VEGF-C proteins in gastric adenocarcinomas was 76.7％ , 71.7％ , and 64.2％ , respectively, which was significantly higher than that (33.3％, 36.7％, and 30.0％) in normal gastric mucosa tissues (P ＜0.05).The expressions of MTA1, MMP-9, and VEGF-C were significantly higher in gastric carcinoma invasion serous membrane, lymph node metastasis, clinical Ⅲ ～ than that in non-invasion serous membrane, non-lymph node metastasis, and clinical Ⅰ ～ Ⅱ (P ＜ 0.05).The expression of MTA1 had significantly positive correlation with that of MMP-9 (P ＜ 0.05) and VEGF-C (P ＜ 0.05) in gastric adenocarcinomas.Conclusions The expressions of MTA1, MMP-9, and VEGF-C were higher in gastric adenocarcinomas than normal gastric mucosa tissues.They may play an important role in the invasion and metastasis of gastric carcinomas.MTA1 may promote infiltration, invasion, and lymph node metastasis of gastric carcinoma through regulation of the expressions of MMP-9 and VEGF-C.The combined detection of MTA1, MMP-9, and VEGF-C expressions has important value to judge the grade malignance of gastric adenocarcinomas.