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Expression of Epidermal Growth Factor Receptor, Ezrin, Hepatocyte Growth Factor, and c-Met in Uveal Melanoma: An Immunohistochemical Study 

Authors: Kandalam Mallikarjuna a;  Vaijayanthi Pushparaj a;  Jyotirmay Biswas a; Subramanian Krishnakumar a
Affiliation:   a Department of Ocular Pathology, Medical and Vision Research Foundation, Chennai, India
DOI: 10.1080/02713680601161220
Publication Frequency: 12 issues per year
Published in: journal Current Eye Research, Volume 32, Issue 3 March 2007 , pages 281 - 290
First Published on: 01 March 2007
Subject: Ophthalmology;
Formats available: HTML (English) : PDF (English)
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Abstract

The immunoreactivity of epidermal growth factor receptor (EGFR) ezrin, hepatocyte growth factor receptor (HGF), and c-Met was studied in 60 uveal melanomas and was correlated with clinicopathologic parameters. Metastases were diagnosed in the patients with uveal melanoma between 5 years and 8 years (median, 6.5 years) after enucleation. Using Kaplan-Meier statistical analysis, we found a significant association between high c-Met expression and death due to uveal melanoma (p < 0.03). EGFR was expressed in 18 of 60 (30%) tumors; ezrin was expressed in 30 of 60 (50%) tumors. Tumors with liver metastasis (n = 6) showed higher expression of c-Met (p = 0.0009) compared with the tumors with no extension/extrascleral extension without liver metastasis (groups A-45 and B-9). HGF was negative in all the six tumors that had liver metastasis. Further studies are required to understand the possible mechanism of ligand-independent c-Met activation in patients with uveal melanoma.
Keywords: choroidal melanoma; c-met; epidermal growth factor receptor; ezrin; hepatocyte growth factor; immunohistochemistry; metastasis
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