Abnormalities of circulating T-cell subpopulations in patients with cutaneous T-cell lymphoma: cutaneous lymphocyte-associated antigen expression on T cells correlates with extent of disease.
The recent characterization of the cutaneous lymphocyte-associated antigen (CLA) as a skin-selective homing receptor for skin-associated memory T cells has suggested a possible mechanism for the tropism demonstrated by the neoplastic T cells in cutaneous T-cell lymphoma (CTCL). In this study, we used five parameter flow cytometry to evaluate expression of CLA and the peripheral lymph node homing receptor L-selectin on circulating T cells in a series of patients with CTCL. Because CTCL cells were previously shown to be CD7-, we looked at expression of these receptors on the CD7- T-cell subset as well as on total T cells. Our results indicate that CTCL patients have increased levels of both CLA+ and CD7- cells in their peripheral blood and that these abnormalities are not seen in patients with other cutaneous disorders. The levels of the CLA-bearing subset correlated with extent of cutaneous but not lymph node disease. By contrast, the CD7- L-selectin+ subset correlated with peripheral lymph node involvement by CTCL. Only the CD7- L-selectin- subset correlated with the number of morphologically abnormal lymphocytes in the peripheral blood. The results support the hypothesis that expression of tissue-selective homing receptors contributes to the unique pattern of tissue involvement seen in patients with CTCL.
Borowitz
M J
MJ
Department of Pathology, Duke University Medical Center, Durham, NC 27710.
Weidner
A
A
Olsen
E A
EA
Picker
L J
LJ
D015703:Antigens, CD / Q000378:metabolism; D019011:Antigens, CD7; D000945:Antigens, Differentiation, T-Lymphocyte / Q000378:metabolism; D000951:Antigens, Neoplasm / Q000378:metabolism*; D015815:Cell Adhesion Molecules / Q000378:metabolism; D006801:Humans; D019041:L-Selectin; D016399:Lymphoma, T-Cell / Q000097:blood / Q000276:immunology* / Q000473:pathology*; D008562:Membrane Glycoproteins; D009182:Mycosis Fungoides / Q000097:blood / Q000276:immunology* / Q000473:pathology*; D016201:Receptors, Lymphocyte Homing / Q000378:metabolism*; D012878:Skin Neoplasms / Q000097:blood / Q000276:immunology / Q000473:pathology; D016176:T-Lymphocyte Subsets / Q000276:immunology* / Q000473:pathology
D015703:Antigens, CD; D019011:Antigens, CD7; D000945:Antigens, Differentiation, T-Lymphocyte; D000951:Antigens, Neoplasm; C063419:CTAGE1 protein, human; D015815:Cell Adhesion Molecules; D008562:Membrane Glycoproteins; D016201:Receptors, Lymphocyte Homing; D019041:L-Selectin