scholarly journals Detection of CD5 in B-cell chronic lymphoproliferative diseases by flow cytometry: a strong expression in B-cell chronic lymphocytic leukemia

2005 ◽  
Vol 20 (suppl 1) ◽  
pp. 56-62
Author(s):  
Geraldo Barroso Cavalcanti Júnior ◽  
Valeria Soraya de Farias Sales ◽  
Dany Geraldo Kramer Cavalcanti e Silva ◽  
Maria Cleide de Araújo Lopes ◽  
Aldair de Souza Paiva ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Chronic Lymphocytic Leukemia ◽  
B Cell ◽  
Lymphoproliferative Disease ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
B Cell Malignancies ◽  
Prolymphocytic Leukemia ◽  
Chronic Lymphoproliferative Diseases ◽  
Cell Chronic Lymphocytic Leukemia

PURPOSE: CD5 is a T cell marker, aberrantly express in B cell chronic lymphocytic leukemia (B-CLL) and mantle cell lymphoma (MCL). Other chronic B cell malignancies including hairy cell leukemia (HCL) and B cell prolymphocytic leukemia (B-PLL) are CD5 negative or express this antigen in a weak way. In this study, CD5 expression was investigated in leukemic cells from 42 patients with chronic B cell lymphoproliferative disease. METHODS: We studied the CD5 expression in leukemic cells from 42 patients with chronic B-cell malignancies by flow cytometry. Demographic features such as age, sex and clinical date were also analyzed. RESULTS: There were 22 males and 20 females. The immunophenotyping showed that 35 cases were B-CLL, 3 B-PLL and HCL and one patient was MCL. CD5 expression was present in all B-CLL and MCL. Low expression of CD5 was observed in one patient with B-PLL and negative in all cases of HCL. CONCLUSION: Our date demonstrated that CD5 expression can help distinguish among B-CLL from HCL and B-PLL, but is similar expressed in MCL.

CD38 expression as an important prognostic factor in B-cell chronic lymphocytic leukemia

Blood ◽  
2001 ◽  
Vol 98 (1) ◽  
pp. 181-186 ◽  
Author(s):  
Sherif Ibrahim ◽  
Michael Keating ◽  
Kim-Anh Do ◽  
Susan O'Brien ◽  
Yang O. Huh ◽  
...  
Keyword(s):  
Flow Cytometry ◽  
Prognostic Factor ◽  
Chronic Lymphocytic Leukemia ◽  
B Cell ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
Aggressive Disease ◽  
Cd38 Expression ◽  
Important Prognostic Factor ◽  
Cell Chronic Lymphocytic Leukemia

Abstract CD38 is a transmembrane glycoprotein expressed on the surface of leukemic cells in a significant percentage of patients with B-cell chronic lymphocytic leukemia (B-CLL). A recent study suggested that CD38 expression has prognostic value in CLL. Peripheral blood samples from 218 patients with B-CLL were analyzed by flow cytometry for CD38 expression on CD5/19+ leukemic cells. Various patient characteristics were studied including age, sex, Rai and Binet stages, splenomegaly, hepatomegaly, hemoglobin (Hgb) level, β-2 microglobulin (β2M) level in the serum, number of nodal sites involved with disease, and length of survival. The Kaplan-Meier method was used to construct survival curves, and the log-rank statistic was used to compare these curves. CD38 was expressed in 20% or more of leukemic cells in 43% of the patients. Patients with high CD38 expression (20% or more) had significantly shorter survival times (P =.00005). Multivariate analyses showed that CD38 expression is an important prognostic factor associated with high incidence of lymph node involvement (P = .004), lower hemoglobin level (P = .001), hepatomegaly (P = .05), and high β2M level (P = .00005). CD38 expression identified a group of patients with aggressive disease that was considered by Rai staging to be early-stage disease (Rai stages 0-II). Patients with CD38+ samples have significantly aggressive disease regardless of their clinical stage. Measurement of CD38 expression by flow cytometry should become a routine test in the evaluation of patients with CLL.

scholarly journals Rearrangement and expression of T cell antigen receptor genes in B cell chronic lymphocytic leukemia

Blood ◽  
1988 ◽  
Vol 71 (1) ◽  
pp. 178-185
Author(s):  
JD Norton ◽  
J Pattinson ◽  
AV Hoffbrand ◽  
H Jani ◽  
JC Yaxley ◽  
...  
Keyword(s):  
T Cell ◽  
Chronic Lymphocytic Leukemia ◽  
B Cell ◽  
Germ Line ◽  
Lymphocytic Leukemia ◽  
Gene Transcript ◽  
Prolymphocytic Leukemia ◽  
Beta 2 ◽  
Beta Gene ◽  
Cell Chronic Lymphocytic Leukemia

Fifty-nine patients with B cell chronic lymphocytic leukemia (B-CLL) were screened for clonal rearrangement of T cell receptor (TCR) beta and gamma chain genes. Four were found with rearranged TCR beta genes, but none had detectable rearrangement of TCR gamma genes. One typical patient with B-CLL had a TCR beta gene structure consistent with a variable-diversity-joining rearrangement into the C beta 2 gene on one allele. An apparently identical rearrangement pattern was seen in a second patient, which suggested that there may be a restriction on the repertoire of possible TCR beta gene recombinations in mature B cells. Two further patients had a simple deletion of sequences, consistent with a diversity-joining rearrangement into C beta 2 on one allele. All four patients had rearrangements of immunoglobulin heavy- and light- chain genes typical of mature B cell malignancies. However, on review of clinical, morphological, and immunophenotype data, two had features consistent with B cell prolymphocytic leukemia or B lymphoma, and a third had progressed to a prolymphocytic transformation. Low-level expression of a predominantly 1.0- to 1.2-kilobase germ line TCR beta gene transcript was detected in several B-CLLs and at a comparable level in the four with rearranged TCR beta genes. This, together with the low frequency of TCR gene rearrangement, suggests that most B-CLL cases arise at a developmental stage when factors required for TCR gene activity are not operative.

Detection of t(14;18)(q32;q21) in B-Cell Chronic Lymphocytic Leukemia

2005 ◽  
Vol 129 (3) ◽  
pp. 410-411
Author(s):  
Wolfgang Kern ◽  
Torsten Haferlach ◽  
Susanne Schnittger ◽  
Claudia Schoch
Keyword(s):  
Flow Cytometry ◽  
In Situ Hybridization ◽  
Chronic Lymphocytic Leukemia ◽  
Follicular Lymphoma ◽  
B Cell ◽  
Lymphocytic Leukemia ◽  
Multiparameter Flow Cytometry ◽  
Lymphoma Therapy ◽  
Cell Chronic Lymphocytic Leukemia

Abstract Cytomorphologic testing and multiparameter flow cytometry are the mainstays in diagnosing B-cell chronic lymphocytic leukemia, whereas fluorescence in situ hybridization that targets the translocation t(14;18)(q32;q21) often is used to identify follicular lymphoma. Therapy is highly diverse between both diseases. We describe a case with cytomorphologically and immunologically proven B-cell chronic lymphocytic leukemia in which t(14;18)(q32;q21) was found.

scholarly journals Prognostic significance of immunoglobulin phenotype in B cell chronic lymphocytic leukemia

Blood ◽  
1985 ◽  
Vol 65 (2) ◽  
pp. 340-344 ◽  
Author(s):  
L Baldini ◽  
R Mozzana ◽  
A Cortelezzi ◽  
A Neri ◽  
F Radaelli ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
B Cell ◽  
Clinical Stage ◽  
Prognostic Significance ◽  
Prognostic Index ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
Clinical Prognosis ◽  
Delta Type ◽  
Cell Chronic Lymphocytic Leukemia

Abstract Seventy-six consecutive untreated patients with B cell chronic lymphocytic leukemia (B-CLL) and classified according to Binet's staging system were studied at the clinical presentation. Several immunologic parameters (number of total and T circulating lymphocytes and their surface membrane immunoglobulin [Smlg] phenotypes and levels of serum Ig) were evaluated with the aim of identifying a biologic marker of prognostic relevance. In this series of persons, Binet staging confirmed its usefulness as a prognostic index (P less than .001). With regard to Smlg, they were mu-type in 41 cases (53.9%), mu- type plus delta-type in 29 cases (38.2%), alpha-type in one case, and not detectable in five cases. No correlations were found between clinical stage and immunoglobulin phenotype, although all but one patient in stage C showed mu-type Smlg alone. On analyzing the survival curves of our patients according to different Smlg phenotypes, we found that patients with only mu-type Smlg had a poorer prognosis (P less than .05) than those with mu-type plus delta-type; this difference was even more significant (P less than .01) in patients in stage A, whereas there were no statistical differences in those in stages B and C. Because the appearance of surface heavy chain of delta-type could be an expression of cell maturation, these results suggest that in B-CLL the presence of phenotypically more mature leukemic cells may correlate with better clinical prognosis, particularly in the early phase of the disease.

scholarly journals Pro-apoptotic properties of hyperforin in leukemic cells from patients with B-cell chronic lymphocytic leukemia

Leukemia ◽  
2006 ◽  
Vol 20 (3) ◽  
pp. 491-497 ◽  
Author(s):  
C Quiney ◽  
C Billard ◽  
A M Faussat ◽  
C Salanoubat ◽  
A Ensaf ◽  
...  
Keyword(s):  
Chronic Lymphocytic Leukemia ◽  
B Cell ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
Cell Chronic Lymphocytic Leukemia

Superagonistic Anti-CD28 Antibody TGN1412 as a Potential Immunotherapeutic for the Treatment of B Cell Chronic Lymphocytic Leukemia.

Blood ◽  
2004 ◽  
Vol 104 (11) ◽  
pp. 2519-2519 ◽  
Author(s):  
Chia-Huey Lin ◽  
Thomas Kerkau ◽  
Christine Guntermann ◽  
Martin Trischler ◽  
Niklas Beyersdorf ◽  
...  
Keyword(s):  
T Cells ◽  
T Cell ◽  
Chronic Lymphocytic Leukemia ◽  
B Cell ◽  
Mhc Class Ii ◽  
T Cell Activation ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
Activation Markers ◽  
Cell Chronic Lymphocytic Leukemia

Abstract B cell chronic lymphocytic leukemia (B-CLL) is characterised by an accumulation of malignant B cells, and impaired humoral and cellular immune responses. Evasion strategies of leukemic cells appear to involve down-regulation of co-stimulatory molecules as well as increased resistance to apoptosis. Here we provide data supporting a novel concept to treat B-CLL with a humanized, superagonistic monoclonal antibody specific for CD28 (TGN1412). Superagonistic anti-CD28 antibodies have been shown to activate human T cells in vitro without requirement for engagement of the T cell antigen receptor (Luhder et al., J. Exp. Med. 2003. 197(8):955–66). Indicative of their activation, TGN1412-triggered T cells from healthy donors upregulate, among other activation markers, CD40L, that has been reported to promote anti-leukemic effects when ectopically expressed on B-CLL cells (Wierda et al., Blood. 2000. 96 (9): 2917–2924). In this report, the responses of PBMCs from B-CLL patients to soluble TGN1412 were examined. We show that in a dose-dependent fashion, polyclonal T cell activation was induced by TGN1412 including proliferation, cytokine production and induction of activation markers such as CD25, CD71, CD134 (Ox40), CTLA-4 (CD152) and CD154 (CD40L). Significantly, modulation of malignant B-CLL cells was also observed. MHC class II molecules (HLA-DR), CD95 and the co-stimulatory molecules CD80 and CD86, but not the proliferation marker Ki-67, were strongly up-regulated upon TGN1412 stimulation. These data suggested that improved antigen-presenting functions of B-CLL cells were induced by TGN1412. Accordingly, preliminary data indicate that B-CLL cells isolated from TGN1412 stimulated cultures induced enhanced proliferation of both allogeneic and autologous T cells, and importantly, TGN1412 activated T cells exhibited enhanced CTL-activity against B-CLL cells. In conclusion, our data suggest that TGN1412 induces polyclonal T cell expansion and activation as well as increased APC function of B-CLL cells. They imply that TGN1412 may have future therapeutic benefit for B-CLL patients.

The Receptor for Hyaluronic Acid Mediated Motility (RHAMM/CD168) Is a Potential Target for Immunotherapy of Patients with B-Cell Chronic Lymphocytic Leukemia.

Blood ◽  
2005 ◽  
Vol 106 (11) ◽  
pp. 53-53 ◽  
Author(s):  
Krzysztof Giannopoulos ◽  
Iwona Hus ◽  
Li Li ◽  
Agnieszka Bojarska-Junak ◽  
Jochen Greiner ◽  
...  
Keyword(s):  
T Cells ◽  
Chronic Lymphocytic Leukemia ◽  
B Cell ◽  
Mononuclear Cells ◽  
Tissue Expression ◽  
T Cell Response ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
Peripheral Blood Mononuclear ◽  
Cell Chronic Lymphocytic Leukemia

Abstract Definition of appropriate target antigens might open new avenues to antigen targeted immunotherapies for patients with B-cell chronic lymphocytic leukemia (B-CLL). We screened the mRNA expression of tumor associated antigens (TAAs), from the literature (fibromodulin, survivin, OFA-iLRP, BAGE, G250, MAGE1, PRAME, proteinase, Syntaxin, hTERT, WT-1), and TAAs defined earlier by serological analysis of cDNA expression libraries from leukemic cells (PINCH, HSJ2, MAZ, MPP11, RHAMM/CD168, NY-Ren60). Peripheral blood mononuclear cells from 43 B-CLL patients and 20 healthy volunteers (HVs) were examined by conventional and quantitative RT-PCR. mRNA of RHAMM/CD168, fibromodulin, syntaxin and NY-Ren60 was expressed in 55–90%, mRNA of HSJ2, MAZ and OFA-iLRP in 90–100% of the patients. No expression of WT-1, h-TERT, BAGE, G250, MAGE1 and survivin was observed. Low (2–20%) expression frequencies of MPP11, PINCH, PRAME and proteinase were detected. RHAMM/CD168, fibromodulin, PRAME and MPP11 showed expression in B-CLL patients, but not in HVs. Because of the exquisite tissue expression of RHAMM/CD168 and its high expression frequency in B-CLL patients even in early stages of disease, mixed lymphocyte peptide culture (MLPC), enzyme-linked immunosorbent spot (ELISPOT) and flow cytometry were performed for antigen specific T cells. In MLPC, RHAMM specific responses by CD8+HLA-A2/R3tetramer+CCR7-CD45RAhigh effector T cells were detected. Moreover, we observed an enhanced RHAMM/CD168 specific CD8+ T cell response after vaccination in one from four HLA-A2 positive B-CLL patients vaccinated with tumor cell lysate pulsed dendritic cells. Therefore, RHAMM/CD168 is an interesting candidate antigen for future immunotherapies in both ZAP-70 (+) and ZAP-70 (−) B-CLL patients.

RHAMM/CD168 Is a Novel Leukemia Associated Antigen with Prognostic Value for Patients with B-Cell Chronic Lymphocytic Leukemia.

Blood ◽  
2006 ◽  
Vol 108 (11) ◽  
pp. 2773-2773
Author(s):  
Krzysztof Giannopoulos ◽  
Alexander Krober ◽  
Anna Dmoszynska ◽  
Jacek Rolinski ◽  
Hartmut Dohner ◽  
...  
Keyword(s):  
T Cells ◽  
Chronic Lymphocytic Leukemia ◽  
B Cell ◽  
Cd8 T Cells ◽  
Mononuclear Cells ◽  
Surrogate Marker ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
Free Survival ◽  
Cell Chronic Lymphocytic Leukemia

Abstract Background and Aims: Differential expression of molecules in patients with B-cell chronic lymphocytic leukemia (B-CLL) might define suitable targets for T cell based vaccines and/or antibody approaches. Methods: We assessed the mRNA expression of the tumor associated antigen (TAA) RHAMM/CD168 defined earlier by serological analysis of cDNA expression libraries (SEREX) from leukemic cells. Results: Peripheral blood mononuclear cells from 40 B-CLL patients and 20 healthy volunteers (HVs) were examined by quantitative RT-PCR. A leukemia-restricted expression of the antigen RHAMM/CD168 was observed in 39/40 B-CLL patients in contrast to the absence of its expression in HVs. To evaluate the immunogenicity of this novel LAA, mixed lymphocyte peptide cultures (MLPCs), followed by enzyme-linked immunosorbent spot (ELISPOT) and flow cytometry assays were performed to detect antigen-specific CD8+ T cells. RHAMM/CD168 specific responses by CD8+ HLA-A2/R3tetramer+CCR7-CD45RAhigh effector T cells were detected. As these CD8+ T cells contribute to the elimination of RHAMM+ CLL cells, we questioned whether expression of the antigen would be associated with a better survival. RHAMM/CD168 expression revealed to be higher in patients with unmutated IgVH status. RHAMM normalized against the housekeeping gene TATA binding protein (TBP), i.e. the RHAMM/TBP ratio was defined as a prognostic surrogate marker for B-CLL. B-CLL patients with a RHAMM/TBP ratio > 1.67 showed a significantly shorter treatment free survival (TFS) (Fig. 1). A tendency towards higher RHAMM/TBP expression ratios was observed in B-CLL cases with del11q. Conclusion: RHAMM/CD168 is a novel LAA in B-CLL patients, an antigen correlating with the clinical course of the disease. Therefore, we consider RHAMM/CD168 an interesting target for immunotherapy in early stage B-CLL patients, especially with worse prognosis (IgVH unmutated). Figure 1. Treatment-free-survival (TFS) according to RHAMM/TBP ratio Figure 1. Treatment-free-survival (TFS) according to RHAMM/TBP ratio

B-Cell Chronic Lymphocytic Leukemia Cells Express a Functional Inducible Nitric Oxide Synthase Displaying Anti-Apoptotic Activity

Blood ◽  
1998 ◽  
Vol 92 (3) ◽  
pp. 1031-1043 ◽  
Author(s):  
Haixia Zhao ◽  
Nathalie Dugas ◽  
Claire Mathiot ◽  
Alain Delmer ◽  
Bernard Dugas ◽  
...  
Keyword(s):  
Nitric Oxide ◽  
Chronic Lymphocytic Leukemia ◽  
Nitric Oxide Synthase ◽  
B Cell ◽  
Lymphocytic Leukemia ◽  
Leukemic Cells ◽  
Inos Mrna ◽  
Nos Inhibitors ◽  
Oxide Synthase ◽  
Cell Chronic Lymphocytic Leukemia

The expression of different isoforms of nitric oxide synthase (NOS) was investigated in B-cell chronic lymphocytic leukemia (B-CLL) to delineate a possible role for nitric oxide (NO) in the control of apoptosis of the tumoral cells. By reverse transcription-polymerase chain reaction (RT-PCR), all B-CLL cells were found to express spontaneously inducible NOS (iNOS) mRNA, whereas endothelial constitutive NOS (ecNOS) mRNA was undetectable. The iNOS protein was detected by immunofluorescence in the cytoplasm of permeabilized leukemic cells and identified by Western blotting, using different anti-iNOS antibodies, as a protein of 135 kD in B-CLL cytoplasmic extracts. B-CLL cell lysates also displayed basal NOS enzymatic activity, as measured by the conversion of14C-labeled L-arginine into 14C-L-citrulline. Ligation of CD23, expressed on the vast majority of B-CLL cells, resulted in increased iNOS expression and activity. The NO released exerted an anti-apoptotic effect on B-CLL cells that was counteracted by NOS inhibitors and engagement of the APO-1/Fas pathway. Therefore, the existence of a functional iNOS in B-CLL cells will provide further insights into the mechanisms that control proliferation and apoptosis in these tumor cells. © 1998 by The American Society of Hematology.

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