Upregulation of S100P, receptor for advanced glycation end products and ezrin in malignant melanoma.
2013
S100P is a member of the S100 family. Increased levels of S100P have been documented in various malignancies. Binding of extracellular S100P to receptor for
advanced glycation end products(RAGE) or coupling of intracellular S100P with a cytoskeletal protein,
ezrin, play a crucial role in tumor growth, invasion and metastasis. However, little is known about the expression of S100P, RAGE and
ezrinin malignant melanoma. We immunostained these three molecules in 20 primary and 20 metastatic melanomas. Samples of 20 benign
nevuspigmentosus and 10 of normal skin were tested as controls. The expression levels (percentage of positively stained cells) of S100P, RAGE and
ezrinwere significantly higher in melanomas than in
nevuspigmentosus. Moreover, slightly but significantly higher expression levels were observed in metastatic than in primary melanomas. Significant positive correlations were evident between the expression levels of S100P and RAGE, S100P and
ezrin, and RAGE and
ezrin, respectively. In conclusion, the coordinate upregulation of S100P, RAGE and
ezrinmay possibly facilitate
malignant transformationof melanoma.
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