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  • Title: Surface antigenic profile of uveal melanoma lesions analysed with a panel of monoclonal antibodies directed against cutaneous melanoma.
    Author: Carrel S, Schreyer M, Gross N, Zografos L.
    Journal: Anticancer Res; 1990; 10(1):81-9. PubMed ID: 1692197.
    Abstract:
    The surface antigenic profile of 10 surgically removed uveal melanoma lesions and 5 conjunctival melanomas was analyzed with a panel of 22 monoclonal antibodies (mAbs) raised against membrane bound cutaneous melanoma-associated antigens (MAA). In addition these lesions were tested for their reactivity with mAbs against MHC class I and II molecules, CD7 (Pan-T) and CD10 (CALLA). The anti-MAA mAbs can be divided into two major groups: first those mAbs detecting markers expressed by the majority of uveal melanomas such as NKI-Beteb, NKI/C3, G7E2, M-2-2-4, Mel-14, G7A5, AMF6, AMF7, Pal M1, Pal M2, Me14/D12. The staining intensity for these mAbs was rather high, ranging in intensity between 70 and 100%. The second group of antibodies includes mAbs detecting markers not or very poorly expressed on ocular melanomas. The anti-ICAM-1 mAb P358 did not react with any of the lesions tested and mAb Muc18 and Muc54 only with one and two out of 15 lesions, respectively. The majority of spindle lesions and mixed type lesions and half of the epitheloid type lesions expressed HLA class I molecules, while HLA class II molecules were found on half of the spindle and epitheloid type lesions and on a small number of mixed cell type lesions. All spindle lesions were found to express the CD10 (CALLA) molecule and less than half of the other type of lesions were stained with an anti CD10 mAb. The melanoma associated ganglioside GD3 was mainly expressed on epitheloid type lesions while GD2 was predominantly expressed on mixed type lesions. In essence, the overall surface phenotype of the uveal melanoma lesions tested, as defined by the panel of mAbs used, differs markedly from the surface phenotype of cutaneous melanoma lesions defined by a very similar antibody panel.
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