Immunohistochemical analysis of ZAP-70 expression in B-cell lymphoid neoplasms

被引:58
作者
Carreras, J
Villamor, N
Colomo, L
Moreno, C
Cajal, SRY
Crespo, M
Tort, F
Bosch, F
López-Guillermo, A
Colomer, D
Montserrat, E
Campo, E
机构
[1] Hosp Clin Barcelona, Inst Invest Biomed August Pi & Sunyer, Dept Pathol, Haemopathol Unit, E-08036 Barcelona, Spain
[2] Hosp Clin Barcelona, Inst Invest Biomed August Pi & Sunyer, Dept Haematol, Haemopathol Unit, E-08036 Barcelona, Spain
[3] Hosp Vall dHebro, Dept Pathol, Barcelona, Spain
关键词
ZAP-70; immunohistochemistry; B-cell lymphoproliferative disorders;
D O I
10.1002/path.1727
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
ZAP-70 is a tyrosine kinase that participates in early B-cell differentiation and is a prognostic factor in chronic lymphocytic leukaemia (CLL), where it is associated with an unmutated configuration of the IgV(H) genes. In this study ZAP-70 expression was studied by immunohistochemistry in a spectrum of B-cell lymphoid neoplasms; this staining method was compared with flow cytometry, and the relationship of ZAP-70 expression to mutational status and prognosis was assessed. 242 tissue samples from 225 patients with B-cell lymphoid neoplasms arising at different maturational stages were included. Flow cytometry was performed in all CLL cases (n = 52). IgV(H) mutational status was determined in 25 CLL and 12 mantle cell lymphoma (MCL) patients. ZAP-70 was positive in 34/52 (65%) CLL, 9/31 (31%) Burkitt's lymphoma, 2/7 (29%) lymphoblastic lymphomas, 3/36 (8%) MCL, 1/23 (4%) marginal zone lymphoma, and 1/45 (2%) diffuse large B-cell lymphomas, but in none of the 19 follicular lymphomas or the 14 Hodgkin lymphomas. An identical ZAP-70 pattern was obtained in six patients with simultaneous biopsies from different sites and in 12 patients with sequential biopsies. Immunohistochemistry and flow cytometry gave identical results in 48 the 52 CLLs. All but one ZAP-70-positive CLL had IgV(H) gene in an unmutated configuration, whereas all but one ZAP-70-negative CLL had somatically hypermutated IgV(H). The 12 MCLs analysed were ZAP-70 negative regardless of IgV(H) mutational status (4 mutated, 8 unmutated). ZAP-70 positive CLL was associated with a shorter overall survival (median time 103 months vs. 293 months, p = 0.01) and a shorter time to disease progression (median time 26 months vs. 60 months, p = 0.01). In conclusion, ZAP-70 is expressed in several types of B-cell neoplasm and is easily detected by immunohistochemistry, providing a useful prognostic marker in patients with CLL from whom no other material is available or when other techniques for its assessment cannot be performed. Copyright (C) 2005 Pathological Society of Great Britain and Ireland. Published by John Wiley & Sons, Ltd.
引用
收藏
页码:507 / 513
页数:7
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