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Frequency and prognostic impact of the aberrant CD8 expression in 5,523 patients with chronic lymphocytic leukemia.
MedLine Citation:
PMID:  22143984     Owner:  NLM     Status:  Publisher    
BACKGROUND: In patients with chronic lymphocytic leukemia (CLL), aberrant expression of the T-lineage antigen CD8 was reported in low frequencies. The clinical impact of this phenomenon remains in discussion. METHODS: We analyzed 5,523 patients with CLL (21-97 years) by multiparametric flow cytometry and performed fluorescence in situ hybridization (FISH), immunoglobulin heavy chain variable (IGHV) region mutational status analysis, and clinical outcome studies. RESULTS: CD8 was positive in 61/5,523 (1.1%) patients. ZAP-70 expression amounted to a mean of 25.4% in CD8-positive vs. 28.2% in CD8-negative cases (n.s.), CD38 expression to a mean of 38.6% vs. 34.0% (n.s.). Cytogenetic alterations did not differ significantly [CD8-positive vs. CD8-negative: 13q deletion: 24/36 (66.7%) vs. 2,015/3,368 (59.8%); trisomy 12:7/35 (20.0%) vs. 487/3,357 (14.5%); 11q deletion: 6/35 (17.1%) vs. 360/3,354 (10.7%)]. A mutated IGHV status showed similar frequency in CD8-positive and CD8-negative cases (31/44; 70.5% vs. 1,700/2,816; 60.4%; n.s.). CD8-positive patients had a shorter median time to treatment compared with CD8-negative patients (12.0 vs. 77.1 months, P = 0.008). In univariable Cox analysis, CD8-positivity adversely influenced median TTT (P = 0.011). In multivariable analysis, the strongest parameters were hemoglobin level and mutated IGHV status (P < 0.001 for both) but CD8-positivity was still relevant (P = 0.074). CONCLUSIONS: This study confirms that CD8 expression is a recurrent albeit rare phenomenon in patients with CLL and suggests that CD8 expression has an adverse prognostic impact. Therefore, CD8 expression should be further investigated for its potential to contribute to risk stratification in patients with CLL. © 2011 International Clinical Cytometry Society.
Wolfgang Kern; Ulrike Bacher; Claudia Haferlach; Tamara Alpermann; Frank Dicker; Susanne Schnittger; Torsten Haferlach
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Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2011-11-18
Journal Detail:
Title:  Cytometry. Part B, Clinical cytometry     Volume:  -     ISSN:  1552-4957     ISO Abbreviation:  -     Publication Date:  2011 Nov 
Date Detail:
Created Date:  2011-12-6     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101235690     Medline TA:  Cytometry B Clin Cytom     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Copyright Information:
Copyright © 2011 International Clinical Cytometry Society.
MLL Munich Leukemia Laboratory, Max-Lebsche-Platz 31, Munich 81377, Germany.
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