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  • Title: Apolipoprotein D expression in cutaneous malignant melanoma.
    Author: Miranda E, Vizoso F, Martín A, Quintela I, Corte MD, Seguí ME, Ordiz I, Merino AM.
    Journal: J Surg Oncol; 2003 Jun; 83(2):99-105. PubMed ID: 12772203.
    Abstract:
    BACKGROUND AND OBJECTIVES: Apolipoprotein D (Apo D) is a protein component of the human plasma lipid transport system, and an androgen-regulated protein in both breast and prostate cancer cell lines. Our goal was to evaluate the expression of Apo D in malignant cutaneous melanomas, as well as to assess its possible relationship to clinical and pathological parameters. METHODS: Apo D expression was analyzed in 32 paraffin-embedded tissues from patients with invasive cutaneous malignant melanomas, in 8 samples from in situ melanoma, and in 10 samples from 10 benign lesions (4 dermal melanocytic nevi, 4 compound melanocytic nevi, and 2 dysplastic melanocytic nevi), using immunohistochemical techniques. RESULTS: The benign lesions were consistently negative for Apo D, whereas 3 of the 8 "in situ" melanomas (37.5%) and 12 of the 32 invasive melanomas (37.5%) showed positive immunostaining for Apo D. The percentage of Apo D-positive tumors was significantly higher in nodular than in superficial spreading melanomas (P = 0.011) and in melanomas with vertical growth phase than in melanomas with radial growth phase (P = 0.02). In addition, the percentage of Apo D-positive tumors was positively and significantly correlated with Clark's level of invasion (P = 0.046). CONCLUSIONS: Apo D may be a new prognostic factor of unfavorable evolution in cutaneous malignant melanoma.
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