Adipophilin expression in cutaneous malignant melanoma. 2017

Masakazu Fujimoto, and Ibu Matsuzaki, and Yuki Yamamoto, and Akihiko Yoshizawa, and Kenji Warigaya, and Yoshifumi Iwahashi, and Fumiyoshi Kojima, and Fukumi Furukawa, and Shin-Ichi Murata
Department of Diagnostic Pathology, Wakayama Medical University, Wakayama, Japan.

BACKGROUND The lipogenic pathway is upregulated in cancer cells, including melanomas. However, the pathological significance of cellular lipids in melanocytic lesions has yet to be determined. In this study, we evaluated intracytoplasmic lipid droplets in melanocytic nevi (MNs) and malignant melanomas via immunohistochemical analysis of adipophilin (ADP), which coats lipid droplets. METHODS One hundred primary cutaneous melanocytic lesions [33 MNs, 17 melanomas in situ (MIS), and 50 invasive melanomas (IMs)] were immunostained for ADP. The intensity score (IS) and proportion score (PS) of ADP staining in each case was recorded semiquantitatively on a scale of 0 to 3+. RESULTS High ADP expression (IS2/3+ and PS2/3+) was observed in 27 primary cutaneous melanocytic lesions that consisted of 23 IMs, three MISs, and one MN. Consequently, high ADP expression was associated with malignancy (38.8% vs. 3.0%; p < 0.0001). Among the IMs, high ADP expression was more prevalent in pT3/4 than pT1/2 (63.3% vs. 23.8%; p = 0.01) and Stage 3/4 than Stage 1/2 (76.9% vs. 36.8%; p = 0.02). CONCLUSIONS The majority of the melanocytic lesions with high ADP expression were malignant melanomas in our cohort. Therefore, ADP expression may serve as a sensitive diagnostic marker for malignant melanoma.

UI MeSH Term Description Entries
D007150 Immunohistochemistry Histochemical localization of immunoreactive substances using labeled antibodies as reagents. Immunocytochemistry,Immunogold Techniques,Immunogold-Silver Techniques,Immunohistocytochemistry,Immunolabeling Techniques,Immunogold Technics,Immunogold-Silver Technics,Immunolabeling Technics,Immunogold Silver Technics,Immunogold Silver Techniques,Immunogold Technic,Immunogold Technique,Immunogold-Silver Technic,Immunogold-Silver Technique,Immunolabeling Technic,Immunolabeling Technique,Technic, Immunogold,Technic, Immunogold-Silver,Technic, Immunolabeling,Technics, Immunogold,Technics, Immunogold-Silver,Technics, Immunolabeling,Technique, Immunogold,Technique, Immunogold-Silver,Technique, Immunolabeling,Techniques, Immunogold,Techniques, Immunogold-Silver,Techniques, Immunolabeling
D008297 Male Males
D008545 Melanoma A malignant neoplasm derived from cells that are capable of forming melanin, which may occur in the skin of any part of the body, in the eye, or, rarely, in the mucous membranes of the genitalia, anus, oral cavity, or other sites. It occurs mostly in adults and may originate de novo or from a pigmented nevus or malignant lentigo. Melanomas frequently metastasize widely, and the regional lymph nodes, liver, lungs, and brain are likely to be involved. The incidence of malignant skin melanomas is rising rapidly in all parts of the world. (Stedman, 25th ed; from Rook et al., Textbook of Dermatology, 4th ed, p2445) Malignant Melanoma,Malignant Melanomas,Melanoma, Malignant,Melanomas,Melanomas, Malignant
D008875 Middle Aged An adult aged 45 - 64 years. Middle Age
D009508 Nevus, Pigmented A nevus containing melanin. The term is usually restricted to nevocytic nevi (round or oval collections of melanin-containing nevus cells occurring at the dermoepidermal junction of the skin or in the dermis proper) or moles, but may be applied to other pigmented nevi. Nevus, Melanocytic,Nevi, Melanocytic,Nevi, Pigmented,Pigmented Moles,Melanocytic Nevi,Melanocytic Nevus,Pigmented Nevi,Pigmented Nevus
D005260 Female Females
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000070780 Perilipin-2 A perilipin that is expressed by many different cell types. It binds FATTY ACIDS and CHOLESTEROL, stabilizes TRIGLYCERIDES, and localizes to both the surface and hydrophobic core of LIPID DROPLETS, as well as the ENDOPLASMIC RECTICULUM and PLASMA MEMBRANE in MACROPHAGES. It also plays a central role in the biogenesis of lipid droplets and FOAM CELLS and is highly expressed by macrophages at atherosclerotic lesions in human arteries along with the INFLAMMATION markers TNF-ALPHA; MCP-1 RECEPTOR; and IL-6. ADRP Protein,Adipophilin,Adipose Differentiation-Related Protein,PLIN2 Protein,Perilipin 2 Protein,Adipose Differentiation Related Protein,Perilipin 2,Protein, Adipose Differentiation-Related,Protein, PLIN2,Protein, Perilipin 2
D000096142 Melanoma, Cutaneous Malignant A primary melanoma that originates from atypical skin MELANOCYTES, especially from acquired and congenital MELANOCYTIC NEVI, and DYSPLASTIC NEVI. FAMMM Syndrome,Familial Atypical Mole-Malignant Melanoma Syndrome,Dysplastic Nevus Syndrome, Hereditary,Melanoma, Familial,Cutaneous Malignant Melanoma,Cutaneous Malignant Melanomas,FAMMM Syndromes,Familial Atypical Mole Malignant Melanoma Syndrome,Familial Melanoma,Familial Melanomas,Malignant Melanoma, Cutaneous,Malignant Melanomas, Cutaneous,Melanomas, Cutaneous Malignant,Melanomas, Familial,Syndrome, FAMMM,Syndromes, FAMMM
D000328 Adult A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available. Adults

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