title: Chemokine receptor expression by leukemic T cells of cutaneous T-cell lymphoma: clinical and histopathological correlations.
abstract: Chemokine receptors expressed by normal and neoplastic lymphocytes provide an important mechanism for cells to traffic into the skin and skin-associated lymph nodes. The goal of this study was to correlate chemokine receptor and CD62L expression by circulating neoplastic T cells with the clinical and pathological findings of the leukemic phase of cutaneous T-cell lymphoma, primarily Sézary syndrome (SS). Chemokine receptor mRNA transcripts were found in the majority of leukemic cells for CCR1, CCR4, CCR7, CCR10, CXCR3, and CD62L and in 20-50% of the samples for CXCR5. In patients with SS, relatively high expression levels of CCR7 and CCR10 by circulating neoplastic T cells correlated with epidermotropism, CXCR5 expression correlated with density of the dermal infiltrate, and CD62L correlated with extent of lymphadenopathy. Of note, CXCR5 expression and a dense dermal infiltrate correlated with a poor prognosis. The chemokine receptor profile supports the concept that neoplastic T cells are central memory T cells, and that CCR10 and CD62L play a fundamental role respectively in epidermotropism and lymphadenopathy that is observed in SS.
authors.affiliation: The Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins Medical Institutes, Baltimore, Maryland, USA.
authors.forename: Elisabetta
authors.initials: E
authors.lastname: Capriotti
authors.forename: Eric C
authors.initials: EC
authors.lastname: Vonderheid
authors.forename: Christopher J
authors.initials: CJ
authors.lastname: Thoburn
authors.forename: Emilie C
authors.initials: EC
authors.lastname: Bright
authors.forename: Allan D
authors.initials: AD
authors.lastname: Hess
mesh_terms: D000328:Adult; D000945:Antigens, Differentiation, T-Lymphocyte; D000951:Antigens, Neoplasm / Q000096:biosynthesis; D005260:Female; D005434:Flow Cytometry / Q000379:methods; D015972:Gene Expression Regulation, Neoplastic; D006801:Humans; D007156:Immunologic Memory / Q000276:immunology; D019041:L-Selectin / Q000096:biosynthesis; D008198:Lymph Nodes / Q000473:pathology; D016410:Lymphoma, T-Cell, Cutaneous / Q000276:immunology* / Q000378:metabolism; D008297:Male; D008562:Membrane Glycoproteins / Q000096:biosynthesis; D008875:Middle Aged; D019707:Receptors, Chemokine / Q000096:biosynthesis*; D012751:Sezary Syndrome / Q000235:genetics; D012867:Skin / Q000276:immunology / Q000473:pathology; D013601:T-Lymphocytes / Q000378:metabolism*
chemical_list: D000945:Antigens, Differentiation, T-Lymphocyte; D000951:Antigens, Neoplasm; C063419:CTAGE1 protein, human; D008562:Membrane Glycoproteins; D019707:Receptors, Chemokine; D019041:L-Selectin