title: Differential expression of MART-1 in primary and metastatic melanoma lesions.
abstract: Twenty-eight primary and 29 metastatic melanoma lesions and 18 pigmented nevi lesions were analyzed by using the immunoperoxidase reaction with anti-MART-1 and anti-gp100 monoclonal antibodies (mAbs). The MART-1 was expressed in 28, 29, and 18, and gp100 was expressed in 27, 28, and eight of these lesions, respectively. Intensity and percentage of stained cells with anti-MART-1 mAb were stronger and higher than those with anti-gp100 mAb. MART-1 was expressed homogeneously in primary melanoma and pigmented nevi, whereas it was heterogeneously expressed in metastatic melanoma lesions. The level of expression of MART-1 in primary melanoma lesions did not correlate with any clinicopathologic parameters. These results suggest that anti-MART-1 mAb is a useful tool for immunohistochemical analysis of melanocytic lesions and also is useful for patients' selection and monitoring of antigen-loss variants in clinical trials with the MART-1-based immunotherapy.
authors.affiliation: Department of Dermatology, Kumamoto University School of Medicine, Japan.
authors.forename: T
authors.initials: T
authors.lastname: Kageshita
authors.forename: Y
authors.initials: Y
authors.lastname: Kawakami
authors.forename: S
authors.initials: S
authors.lastname: Hirai
authors.forename: T
authors.initials: T
authors.lastname: Ono
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm / Q000032:analysis*; D005260:Female; D015789:HLA-A2 Antigen / Q000032:analysis; D006801:Humans; D007124:Immunoenzyme Techniques; D058965:MART-1 Antigen; D008297:Male; D008545:Melanoma / Q000276:immunology*; D008562:Membrane Glycoproteins / Q000032:analysis; D008875:Middle Aged; D009362:Neoplasm Metastasis; D009363:Neoplasm Proteins / Q000032:analysis*; D009508:Nevus, Pigmented / Q000276:immunology; D058951:gp100 Melanoma Antigen
chemical_list: D000911:Antibodies, Monoclonal; D000951:Antigens, Neoplasm; D015789:HLA-A2 Antigen; D058965:MART-1 Antigen; C548667:MLANA protein, human; D008562:Membrane Glycoproteins; D009363:Neoplasm Proteins; C548637:PMEL protein, human; D058951:gp100 Melanoma Antigen