RACK1 predicts poor prognosis and regulates progression of esophageal squamous cell carcinoma through its epithelial-mesenchymal transition

Feb 27, 2015Cancer biology & therapy

RACK1 is linked to worse outcomes and helps esophageal cancer spread by promoting cell changes

AI simplified

Circadian Biology on OpenScience ↗PubMed ↗DOI ↗

Abstract

RACK1 expression was significantly associated with tumor length, diameter, T stage, and lymph node metastasis in esophageal squamous cell carcinoma (ESCC).

RACK1 expression serves as an independent predictor for overall survival (OS) and disease-free survival (DFS) in ESCC.
Down-regulation of RACK1 inhibited cell proliferation, invasion, and migration in both laboratory and animal models.
A positive correlation was observed between RACK1 expression and the protein vimentin, while an inverse correlation with E-cadherin was noted.

AI simplified

BACKGROUND: RACK1 is known to be involved in tumor progression, and its prognostic value on many kinds of tumors has been identified. However, there are limited studies about the functional role of RACK1 in esophageal squamous cell carcinoma (ESCC).

PATIENTS AND METHODS: RACK1 expression was examined in 100 ESCC tissue samples using immunohistochemistry staining. RACK1 was knocked-down in ESCC cell lines by shRNA. The effects on cell proliferation, invasion and migration were examined in ESCC cell lines and nude mouse model. Vimentin and E-cadherin were introduced to further study the association between RACK1 and EMT.

RESULTS: RACK1 expression was significantly associated with the tumor length (P = 0.012), diameter<3 cm (P = 0.047), T stage (P = 0.032), and lymph node metastasis (P = 0.038), respectively. Kaplan-Meier survival analysis and Cox analyses revealed RACK1 expression was an independent predictor for OS (P = 0.030) and DFS (P = 0.027) in ESCC. Down-regulation of RACK1 inhibited cell proliferation, along with invasion and migration in vitro and in vivo. A significant positive correlation between RACK1 expression and vimentin (P = 0.0190) and an inverse correlation between RACK1 expression and E-cadherin (P = 0.0047) were found.

CONCLUSIONS: RACK1 predicted poor prognosis in ESCC, promoted tumor progression, and was involved in EMT of ESCC.

Full Text

Full text is available at the source.

View full text ↗

RACK1 predicts poor prognosis and regulates progression of esophageal squamous cell carcinoma through its epithelial-mesenchymal transition

Abstract

Full Text

You found one interesting study. We’ll send the next 7.

what lands in your inbox each week:

Recent issues from the circadian biology brief

Abstract

Full Text

Related papers

You found one interesting study. We’ll send the next 7.

what lands in your inbox each week:

Recent issues from the circadian biology brief