Abstract
The present study aimed to explore the possible effects of membrane‑type 1 matrix metalloproteinase (MT1‑MMP) on gastric carcinoma cells proliferation and invasion. Immunohistochemistry analysis was conducted to measure MT1‑MMP expression level in 15 patients with gastric carcinoma. Subsequently, recombinant short hairpin RNA (shRNA) vectors targeting MT1‑MMP were constructed to silence the expression of MT1‑MMP in gastric carcinoma cells. Then, the inhibitive efficiency was verified via reverse transcription quantitative polymerase chain reaction (RT‑qPCR) and western blot analysis. The effects of MT1‑MMP silencing on cell proliferation and invasion were detected through Cell Counting Kit‑8 test and Transwell assays. The expression levels of vimentin and epithelial cadherin (E‑cadherin) were detected by RT‑qPCR. The immunohistochemistry analysis results revealed that MT1‑MMP expression in gastric carcinoma tissues was markedly overexpressed compared with non‑cancerous adjacent tissues. The MT1‑MMP expression level in cancer‑derived cell line AGS cells was also significantly increased compared with that in non‑cancer‑derived GES‑1 cells. In addition, the MT1‑MMP expression level in AGS cells was significantly decreased via shRNA transfection. Cell proliferation and invasion were markedly inhibited following knockdown of MT1‑MMP level in AGS cells. These inhibitory effects were associated with the decreased expression of vimentin and increased expression of E‑cadherin. MT1‑MMP was overexpressed in gastric carcinoma cells, and silencing of MT1‑MMP inhibited the proliferation and invasion of cells via regulating the expression of vimentin and E‑cadherin.