論文 - 詳細
| RRC ID | 45324 |
|---|---|
| 著者 | Feng MX, Ma MZ, Fu Y, Li J, Wang T, Xue F, Zhang JJ, Qin WX, Gu JR, Zhang ZG, Xia Q. |
| タイトル | Elevated autocrine EDIL3 protects hepatocellular carcinoma from anoikis through RGD-mediated integrin activation. |
| ジャーナル | Mol Cancer |
| Abstract |
BACKGROUND:A remolded microenvironment in hepatocellular carcinoma (HCC) caused by abnormally expressed matricellular proteins could promote HCC progression. The cell-matrix interactions mediated by integrins play an important role in tumor microenvironment. Epidermal Growth Factor-like repeats and Discoidin I-Like Domains 3 (EDIL3), an extracellular matrix (ECM) protein with angiogenic and anti-inflammatory effects, is abnormally highly expressed in HCC. Here we aim to analyze its expression in liver and HCC tissues, investigate the underlined mechanisms accounted for HCC progression. METHODS:EDIL3 expression level is examined in normal liver, cirrhotic liver and HCC at both mRNA and protein level. The association between EDIL3 and clinical outcomes is analyzed. The pattern of EDIL3 expression and location is examined using Immunofluorescence and ELISA. Overexpression or knock-down of EDIL3 in a panel of cell lines are subjected to assays related to proliferation, invasion, and anoikis to investigate the mechanisms of this matrix protein in HCC progression. Recombinant EDIL3 treatment is applied to confirm the results. RESULTS:Compared with normal liver and cirrhotic liver, EDIL3 is elevated in HCC. High level of EDIL3 protein is much more commonly in patients with larger tumor or portal vein tumor thrombus (PVTT) formation, associated with poor prognosis. EDIL3 is abundantly expressed in HCC cells and secreted by cancer cells. In vitro and in vivo studies indicate that EDIL3, probably in an autocrine manner, inhibits anoikis and promotes anchorage-independent growth of HCC cells. Further mechanistic studies suggest integrin ligation by EDIL3 and thus that the sustained activation of the FAK-Src-AKT signal is responsible for the anoikis resistance and anchorage independence. Both the administration of cilengitide, a RGD-containing integrin antagonist, and silencing of integrin αV, an important RGD-binding integrin, results in the blockade of anoikis-resistance induced by EDIL3. CONCLUSION:Our study suggests that high levels of autocrine EDIL3 may contribute to a receptive microenvironment for the survival of detached HCC cells and may involve in cancer cell spreading. We also highlight the importance of interaction between EDIL3 and integrin αV and suggest disrupting the ligation of EDIL3 to integrins via RGD-blocking in selected patients may bear potential therapeutic value. |
| 巻・号 | 13 |
| ページ | 226 |
| 公開日 | 2014-10-1 |
| DOI | 10.1186/1476-4598-13-226 |
| PII | 1476-4598-13-226 |
| PMID | 25273699 |
| PMC | PMC4200221 |
| MeSH | Animals Anoikis* / genetics Autocrine Communication* / genetics Calcium-Binding Proteins Carcinogenesis / pathology Carcinoma, Hepatocellular / blood supply Carcinoma, Hepatocellular / genetics Carcinoma, Hepatocellular / metabolism Carcinoma, Hepatocellular / pathology* Carrier Proteins / genetics Carrier Proteins / metabolism* Cell Adhesion Cell Adhesion Molecules Cell Line, Tumor Cell Proliferation Female Gene Expression Regulation, Neoplastic Gene Knockdown Techniques Humans Integrin alphaV / metabolism* Liver Neoplasms / blood supply Liver Neoplasms / genetics Liver Neoplasms / metabolism Liver Neoplasms / pathology* Male Mice, Nude Middle Aged Oligopeptides / metabolism* Portal Vein / pathology Prognosis Reproducibility of Results Signal Transduction Thrombosis / pathology Up-Regulation / genetics |
| IF | 15.302 |
| 引用数 | 17 |
| WOS 分野 | ONCOLOGY BIOCHEMISTRY & MOLECULAR BIOLOGY |
| リソース情報 | |
| ヒト・動物細胞 | HuH-7 |