title: Low CD23 expression correlates with high CD38 expression and the presence of trisomy 12 in CLL.
abstract: Chronic lymphocytic leukemia (CLL) is characterized by a neoplastic B-cell population coexpressing CD5 and CD23; however, the expression of CD23 is variable. In human, two isotypes of CD23 have been identified and related to different functions. The aim of our study was to investigate the relative expression of the two CD23 isotypes in CLL and find possible correlation with other prognostic factors. The expression of CD23 isotypes was analyzed in 54 cases of CLL by polymerase chain reaction (PCR) and quantitative real-time PCR. The immunophenotype of CLL cells was characterized by flow cytometry. We demonstrated a higher CD23a than CD23b expression of CLL cells. Our results also revealed two subsets of CLL cases with a distinct CD23 isotype expression pattern. Thirty-two percent of the cases (group CLL1) showed both low mRNA level of CD23 isotypes and high protein levels of CD20 and CD38 in contrast to group CLL2 with high CD23 mRNA levels. By correlating these results to the presence of prognostic factors determined by fluorescence in situ hybridization, we found that the majority of the cases of group CLL1 (14/17) carried trisomy 12. In summary, our results confirm a high CD23a/CD23b ratio of the CLL cells and demonstrate that in a subset of CLL cases, low CD23 expression together with high CD20 and CD38 expressions may serve as a surrogate for trisomy 12. Copyright © 2015 John Wiley & Sons, Ltd.
authors.affiliation: 1st Department of Pathology and Experimental Cancer Research, Faculty of Medicine, Semmelweis University, Budapest, Hungary.
authors.forename: Csilla
authors.initials: C
authors.lastname: Kriston
authors.affiliation: 1st Department of Pathology and Experimental Cancer Research, Faculty of Medicine, Semmelweis University, Budapest, Hungary.
authors.forename: Csaba
authors.initials: C
authors.lastname: Bödör
authors.affiliation: RT-Europe Research Center, Mosonmagyaróvár, Hungary.
authors.forename: Kálmán
authors.initials: K
authors.lastname: Szenthe
authors.affiliation: RT-Europe Research Center, Mosonmagyaróvár, Hungary.
authors.forename: Ferenc
authors.initials: F
authors.lastname: Bánáti
authors.affiliation: RT-Europe Research Center, Mosonmagyaróvár, Hungary.
authors.forename: Barbara
authors.initials: B
authors.lastname: Bánkuti
authors.affiliation: 1st Department of Pathology and Experimental Cancer Research, Faculty of Medicine, Semmelweis University, Budapest, Hungary.
authors.forename: Balázs
authors.initials: B
authors.lastname: Csernus
authors.affiliation: 1st Department of Pathology and Experimental Cancer Research, Faculty of Medicine, Semmelweis University, Budapest, Hungary.
authors.forename: Lilla
authors.initials: L
authors.lastname: Reiniger
authors.affiliation: 1st Department of Pathology and Experimental Cancer Research, Faculty of Medicine, Semmelweis University, Budapest, Hungary.
authors.forename: Judit
authors.initials: J
authors.lastname: Csomor
authors.affiliation: 1st Department of Pathology and Experimental Cancer Research, Faculty of Medicine, Semmelweis University, Budapest, Hungary.
authors.forename: András
authors.initials: A
authors.lastname: Matolcsy
authors.affiliation: 1st Department of Pathology and Experimental Cancer Research, Faculty of Medicine, Semmelweis University, Budapest, Hungary.
authors.forename: Gábor
authors.initials: G
authors.lastname: Barna
mesh_terms: D051997:ADP-ribosyl Cyclase 1 / Q000378:metabolism*; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D018951:Antigens, CD20 / Q000378:metabolism; D002881:Chromosomes, Human, Pair 12 / Q000648:ultrastructure*; D015331:Cohort Studies; D005260:Female; D005434:Flow Cytometry; D020869:Gene Expression Profiling; D015973:Gene Expression Regulation, Leukemic; D006801:Humans; D016130:Immunophenotyping; D017404:In Situ Hybridization, Fluorescence; D015451:Leukemia, Lymphocytic, Chronic, B-Cell / Q000097:blood / Q000378:metabolism*; D018442:Lymphoma, B-Cell, Marginal Zone / Q000378:metabolism; D020522:Lymphoma, Mantle-Cell / Q000378:metabolism; D008297:Male; D008875:Middle Aged; D010641:Phenotype; D011379:Prognosis; D012333:RNA, Messenger / Q000378:metabolism; D060888:Real-Time Polymerase Chain Reaction; D017455:Receptors, IgE / Q000378:metabolism*; D014314:Trisomy
chemical_list: D018951:Antigens, CD20; D012333:RNA, Messenger; D017455:Receptors, IgE; D051997:ADP-ribosyl Cyclase 1
keywords: CD23; CD38; CLL; trisomy 12