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Fröhlich, E; Mack, AF; Garbe, C; Klessen, C.
Distribution and colocalization of markers for proliferation, invasion, motility and neoangiogenesis in benign melanocytic naevi and malignant melanomas.
Br J Dermatol. 2005; 153(6):1159-1165
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Autor/innen der Med Uni Graz:
Fröhlich Eleonore

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BACKGROUND: Melanomas are heterogeneous tumours, and differentiation from other melanocytic lesions may cause problems. It may be possible that the distribution and/or colocalization pattern of different markers in the lesions can enable a more accurate diagnosis of melanocytic tumours. OBJECTIVES: To test this hypothesis, melanocytic naevi, primary melanomas and metastases were investigated. METHODS: The distribution and colocalization of markers for proliferation, invasion, angiogenesis and motility of the tumour cells were investigated using antibodies directed against actin, cathepsin B (CatB), transforming growth factor-beta, vascular endothelial growth factor (VEGF), proliferating cell nuclear antigen/Ki-67 and basic fibroblast growth factor (FGF-2). In addition, melanoma markers (HMB-45 and Melan-A) and proteins unrelated to melanoma progression [epidermal growth factor (EGF) and cathepsin H] were investigated. RESULTS: Malignant melanomas tended to express more markers of malignancy compared with melanocytic naevi, and the differences were statistically significant for EGF and actin immunoreactivity: melanocytic naevi displayed clear EGF labelling more often (60% vs. 5%) and melanomas showed more intense actin labelling (70% vs. 0%). HMB-45+ cells to a large extent also stained with antibodies to CatB but not to EGF or actin; EGF-, FGF-2- and VEGF-immunoreactive cells were predominantly HMB-45-. Similar combinations were observed in melanocytic naevi and in melanomas. CONCLUSIONS: Labelling with EGF may improve the differential diagnosis of melanocytic neoplasias. However, we did not detect a clear-cut increase of markers of malignancy in melanoma. Cells expressing multiple malignancy markers were also found in some melanocytic naevi; this may confirm the dormant potential of melanocytic naevi for melanoma development.
Find related publications in this database (using NLM MeSH Indexing)
Cell Movement -
Cell Proliferation -
Diagnosis, Differential -
Epidermal Growth Factor - metabolism
Humans - metabolism
Melanoma - blood supply
Neoplasm Invasiveness - blood supply
Neoplasm Proteins - metabolism
Neovascularization, Pathologic - metabolism
Nevus, Pigmented - blood supply
Skin Neoplasms - blood supply
Tumor Markers, Biological - metabolism

Find related publications in this database (Keywords)
epidermal growth factor
vascular endothelial growth factor
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