Primary cutaneous CD8+ and CD56+ T-cell lymphomas express HLA-G and killer-cell inhibitory ligand, ILT2.
Primary cutaneous lymphomas constitute a spectrum of diseases characterized by a clonal accumulation of lymphocytes in the skin. Cutaneous T-cell lymphomas of the cytotoxic phenotype, including CD8+ and CD56+ lymphomas, are rare entities that have only been recently recognized and characterized. These lymphomas often show an aggressive clinical course. We investigated the expression of human leukocyte antigen G (HLA-G) and interleukin 10 (IL-10) in conjunction with expression of HLA-G killer-cell inhibitory receptor ligand immunoglobulin-like transcript 2 (ILT2) in 3 CD56+CD4+ and 4 CD8+ cutaneous T-cell lymphomas. HLA-G expression was detected in 2 of 3 lymphomas of the CD56+CD4+ type and in all lymphomas of CD8+ type. It is of note that CD56+CD4+ lymphomas displayed stronger HLA-G reactivity. The expression of IL-10 matched the expression of HLA-G. Together with the expression of IL-10, HLA-G might be one of the factors accounting for the evasion of immunosurveillance, thus contributing to aggressive phenotype of these lymphoma entities.
Department of Dermatology, University Hospital Zurich, Zurich, Switzerland. mirjana.urosevic@usz.ch
Mirjana
M
Urosevic
Jivko
J
Kamarashev
Günter
G
Burg
Reinhard
R
Dummer
D000328:Adult; D000368:Aged; D015703:Antigens, CD / Q000096:biosynthesis*; D019002:CD56 Antigen / Q000096:biosynthesis*; D016827:CD8 Antigens / Q000096:biosynthesis*; D005260:Female; D006680:HLA Antigens / Q000096:biosynthesis*; D059951:HLA-G Antigens; D015395:Histocompatibility Antigens Class I / Q000096:biosynthesis*; D006801:Humans; D007150:Immunohistochemistry; D016753:Interleukin-10 / Q000096:biosynthesis; D007694:Killer Cells, Natural / Q000166:cytology / Q000378:metabolism*; D000075362:Leukocyte Immunoglobulin-like Receptor B1; D008223:Lymphoma / Q000378:metabolism* / Q000473:pathology; D016399:Lymphoma, T-Cell / Q000378:metabolism*; D008297:Male; D008875:Middle Aged; D010641:Phenotype; D011971:Receptors, Immunologic / Q000096:biosynthesis*; D012878:Skin Neoplasms / Q000378:metabolism* / Q000473:pathology
D015703:Antigens, CD; D019002:CD56 Antigen; D016827:CD8 Antigens; D006680:HLA Antigens; D059951:HLA-G Antigens; D015395:Histocompatibility Antigens Class I; C105299:LILRB1 protein, human; D000075362:Leukocyte Immunoglobulin-like Receptor B1; D011971:Receptors, Immunologic; D016753:Interleukin-10