Clinical & Experimental Metastasis

, Volume 29, Issue 8, pp 957–969

Over-expression of integrin-linked kinase correlates with aberrant expression of Snail, E-cadherin and N-cadherin in oral squamous cell carcinoma: implications in tumor progression and metastasis

  • Dan Zhao
  • Xiu-Fa Tang
  • Kai Yang
  • Ji-Yuan Liu
  • Xiang-Rui Ma
Research Paper

DOI: 10.1007/s10585-012-9485-1

Cite this article as:
Zhao, D., Tang, XF., Yang, K. et al. Clin Exp Metastasis (2012) 29: 957. doi:10.1007/s10585-012-9485-1

Abstract

Integrin-linked kinase (ILK), an intracellular protein with serine/threonine protein kinase activities, plays a key role in integrin mediated cell-excellular matrix interactions, regulating cell proliferation, apoptosis, differentiation, and migration. ILK has been implicated in the development and progression in several malignancies. However, the role of ILK and ILK-mediated epithelial–mensenchymal transition (EMT) in the progression of oral squamous cell carcinoma (OSCC) has not been well understood. Here, by immunohistochemistry, we studied the expression of ILK, Snail, E-cadherin and N-cadherin in 98 primary OSCC specimens and analyzed their correlations with clinicopathologic profiles and clinical outcome. We also investigated the expression of ILK in 42 corresponding lymph node metastases. Positive expression of ILK protein was detected in 87.8 % of the primary tumors and 100 % of metastatic lesions. Increased ILK expression was correlated strongly with enhanced tumor invasion, higher tumor grade, advanced clinical stage, positive lymph node status and increased risk of recurrence. Higher ILK expression was also observed in lymph node metastases in comparison with the corresponding primary tumor. Moreover, up-regulation of Snail and N-cadherin and down-regulation of E-cadherin correlated significantly with both ILK over-expression and tumor invasion. Patients with higher ILK expression exhibited shorter disease-free survival while those with absent E-cadherin expression exhibited shorter overall and disease-free survival. Taken together, our results suggest that ILK may have an important role in progression and metastasis of OSCC, possibly through EMT involving up-regulation of Snail and consequent aberrant expression of E-cadherin and N-cadherin. ILK should be considered as a critical prognostic indicator for patients with OSCC.

Keywords

Integrin-linked kinase Oral squamous cell carcinoma Snail Epithelial–mesenchymal transition Progression Metastasis 

Abbreviations

ILK

Integrin-linked kinase

EMT

Epithelial–mensenchymal transition

OSCC

Oral squamous cell carcinoma

HNSCC

Head and neck squamous cell carcinoma

Copyright information

© Springer Science+Business Media B.V. 2012

Authors and Affiliations

  • Dan Zhao
    • 1
  • Xiu-Fa Tang
    • 2
  • Kai Yang
    • 1
  • Ji-Yuan Liu
    • 2
  • Xiang-Rui Ma
    • 2
  1. 1.Department of Oral and Maxillofacial SurgeryThe First Affiliated Hospital of Chongqing Medical UniversityChongqingChina
  2. 2.Department of Head and Neck OncologyWest China College of Stomatology, Sichuan UniversityChengduChina

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