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American Journal of Pathology, Vol 143, 656-662, Copyright © 1993 by American Society for Investigative Pathology

REGULAR ARTICLES

A putative marker for human melanoma. A monoclonal antibody derived from the melanoma gene in the Xiphophorus melanoma model

JR Vielkind, VA Tron, BM Schmidt, GJ Dougherty, VC Ho, BW Woolcock, B Sadaghiani and CJ Smith
Department of Pathology, University of British Columbia, Vancouver, Canada.

A MoAb was raised against a peptide corresponding to an exposed domain of the putative tyrosine kinase receptor protein encoded by Xmrk, a gene involved in melanoma formation and/or progression in the Xiphophorus fish melanoma model. The antibody reacts specifically with cells from human melanocytic lesions, ie, common acquired nevi, primary and metastatic melanoma biopsies. No reactivity with other cells, including normal melanocytes, was observed in the biopsies or with cells in biopsies from normal tissue (skin, liver, lung, spleen) and from other malignancies including those of neuroectodermal origin. The reactivity was very weak and variable in metastatic melanomas but very strong and characteristic of a receptor-type antigen in primary melanomas, a stage in melanoma progression in which cells have acquired metastasizing potential. It is suggested that the antigen recognized may be involved in growth promotion and represents the human equivalent of the fish melanoma gene product.


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[Abstract] [Full Text] [PDF]


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Copyright © 1993 by the American Society for Investigative Pathology.