Integrin-linked kinase silencing induces a S/G2/M phases cell cycle slowing and modulates metastasis-related genes in SGC7901 human gastric carcinoma cells.

Abstract

BACKGROUND AND AIM:

Integrin-linked kinase has been implicated in metastasis of human tumors. Recent studies have also shown that the down-regulation of integrin-linked kinase has anti-tumor potential by inhibiting the metastatic potential of several types of cultured human cancer cells. However, the mechanism by which integrin-linked kinase regulates metastasis in human gastric carcinoma is not fully clear. We investigated the effect of integrin-linked kinase deletion on metastasis-associated markers in human gastric carcinoma SGC-7901 cell lines.

METHODS:

We generated cell lines depleted for integrin-linked kinase. Cell adhesion and invasion were measured by the MTS assay and transwell assay. The cell cycle was measured by flow cytometry. Expression of metastasis-related genes was assessed by reporter assay, quantitative RT-PCR and western blotting.

RESULTS:

Our data showed an inhibitory effect on cell adhesion and invasion after silencing of integrin-linked kinase. The cell cycle was slowed in S/G2/M phases. Metastasis-related genes E-cadherin, MMP-2/9 and cystatin B, as well as the signaling molecules p-Akt, NF-κB, and AP-1 activation, were also modulated. Our results indicate that integrin-linked kinase plays an important role in metastasis of human gastric carcinoma cells.

CONCLUSIONS:

Down-regulation of integrin-linked kinase resulted in the impairment of the metastatic potential of gastric tumor cells by regulating metastasis-related gene expression, by inhibiting the Akt pathway as well as the activity of transcription factors. Integrin-linked kinase could be used as a potential therapeutic target.

• Authors: Wei Song, Chunming Zhao, Rui Jiang
• Journal: Tumori (Tumori) 2013 Mar-Apr Vol. 99 Issue 2 Pg. 249-56 ISSN: 2038-2529 [Electronic] United States
• PMID: 23748822 (Publication Type: Journal Article)

Chemical References

• integrin-linked kinase
• Protein Serine-Threonine Kinases
• Proto-Oncogene Proteins c-akt
• Matrix Metalloproteinase 2
• Matrix Metalloproteinase 9

Topics

• Blotting, Western
• Cell Division (genetics)
• Cell Line, Tumor
• Down-Regulation
• Flow Cytometry
• G2 Phase (genetics)
• Gene Expression Regulation, Enzymologic
• Gene Expression Regulation, Neoplastic
• Gene Silencing
• Humans
• Matrix Metalloproteinase 2 (metabolism)
• Matrix Metalloproteinase 9 (metabolism)
• Protein Serine-Threonine Kinases (genetics)
• Proto-Oncogene Proteins c-akt (metabolism)
• Real-Time Polymerase Chain Reaction
• Reverse Transcriptase Polymerase Chain Reaction
• S Phase (genetics)
• Stomach Neoplasms (genetics, pathology)