Pathology & Oncology Research

, Volume 19, Issue 1, pp 27–33 | Cite as

Integrin-Linked Kinase (ILK) Expression Correlates with Tumor Severity in Clear Cell Renal Carcinoma

  • Míriam de Fátima Brasil EngelmanEmail author
  • Rogério Mendes Grande
  • Marcelo Andery Naves
  • Marcello Fabiano de Franco
  • Vicente de Paulo Castro Teixeira


Integrin-linked kinase (ILK) is an unique intracellular serine/threonine kinase and adapter protein. When dysregulated, it has been associated with increased cell proliferation, anchorage-independent cell growth, evasion of apoptosis, angiogenesis, invasion of surrounding tissues, downregulation of E-cadherin expression, nuclear translocation of β-catenin and metastasis, all features of tumoral malignancy. The objective of the present work was to evaluate the expression of ILK in clear cell renal carcinomas (CCRC) as a possible prognostic indicator. ILK immunoexpression was evaluated in a tissue microarray (TMA) with 45 human CCRCs. In addition, the apoptotic and proliferative indices and the immuno-expression of β-catenin and E-cadherin were also evaluated. E-cadherin expression was significantly decreased in tumors with positive ILK expression in relation to those with negative immunoexpression (p = 0.011). ILK immunostaining was significantly increased in high-grade in comparison to low-grade CCRCs (p = 0.0008). ILK expression was also associated with increased proliferative index (p = 0.020), tumor size >7.0 cm (p = 0.018) and with renal vein and capsule invasion (p = 0.003 and p = 0.00). Finally, tumors stage I and II (noninvasive) presented significantly reduced ILK immunoexpression when compared to stage III (locally invasive) (p = 0.0028). ILK immunoexpression in CCRC increases with loss of intercellular adhesion, nuclear grading, increased proliferative index and Robson stage. Altogether, our data suggest a possible role for ILK in the progression of CRCC.


Immunohistochemistry Tissue array analysis Carcinoma Renal cell Integrin-linked kinase Human 



The authors would like to thank Mrs. Ivonete Barbosa for her technical assistance.


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Copyright information

© Arányi Lajos Foundation 2012

Authors and Affiliations

  • Míriam de Fátima Brasil Engelman
    • 1
    • 3
    Email author
  • Rogério Mendes Grande
    • 1
  • Marcelo Andery Naves
    • 2
  • Marcello Fabiano de Franco
    • 2
  • Vicente de Paulo Castro Teixeira
    • 2
  1. 1.Faculdade de Ciências da Saúde Dr José Antonio Garcia CoutinhoUniversidade do Vale do SapucaiPouso AlegreBrazil
  2. 2.Departamento de PatologiaUniversidade Federal de São PauloSão PauloBrazil
  3. 3.Pouso AlegreBrazil

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