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Purroy N, Abrisqueta P, Carabia J, Calpe E, Carpio C, Palacio C, Crespo M, Bosch F. Effect of syk inhibition by TAK659 on proliferative, survival, and migratory signals from the microenvironment in chronic lymphocytic leukemia. J Clin Oncol 2014. [DOI: 10.1200/jco.2014.32.15_suppl.7058] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Affiliation(s)
- Noelia Purroy
- Laboratory of Experimental Hematology. University Hospital Vall d'Hebron, Barcelona, Spain
| | - Pau Abrisqueta
- Laboratory of Experimental Hematology. University Hospital Vall d'Hebron, Barcelona, Spain
| | - Julia Carabia
- Laboratory of Experimental Hematology, Barcelona, Spain
| | - Eva Calpe
- Laboratory of Experimental Hematology. University Hospital Vall d'Hebron, Barcelona, Spain
| | - Cecilia Carpio
- Laboratory of Experimental Hematology. University Hospital Vall d'Hebron, Barcelona, Spain
| | - Carles Palacio
- Laboratory of Experimental Hematology. University Hospital Vall d'Hebron, Barcelona, Spain
| | - Marta Crespo
- Laboratory of Experimental Hematology. University Hospital Vall d'Hebron, Barcelona, Spain
| | - Francesc Bosch
- Laboratory of Experimental Hematology. University Hospital Vall d'Hebron, Barcelona, Spain
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Baptista MJ, Calpe E, Fernandez E, Colomo L, Cardesa-Salzmann TM, Abrisqueta P, Bosch F, Crespo M. Analysis of the IGHV region in Burkitt's lymphomas supports a germinal center origin and a role for superantigens in lymphomagenesis. Leuk Res 2014; 38:509-15. [PMID: 24480549 DOI: 10.1016/j.leukres.2014.01.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2013] [Revised: 12/20/2013] [Accepted: 01/01/2014] [Indexed: 01/22/2023]
Abstract
The analysis of immunoglobulin heavy chain variable (IGHV) region may disclose the influence of antigens in Burkitt's lymphomas (BL). IGHV sequences from 38 patients and 35 cell lines were analyzed. IGHV3 subset genes were the most used and IGHV4-34 gene was overrepresented. IGHV genes were mutated in 98.6% of the cases, 36% acquired potential glycosylation sites, and in 52% somatic-hypermutation-process was ongoing. Binding motifs for superantigens like Staphylococcal protein A and carbohydrate I/i were preserved in 89% of the cases. IGHV analysis of BL cells supports a germinal center origin and points toward a role for superantigens in lymphomagenesis.
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Affiliation(s)
- Maria Joao Baptista
- Laboratory of Experimental Hematology, Department of Hematology, Vall d'Hebron University Hospital, Universitat Autonòma de Barcelona, Barcelona, Spain
| | - Eva Calpe
- Laboratory of Experimental Hematology, Department of Hematology, Vall d'Hebron University Hospital, Universitat Autonòma de Barcelona, Barcelona, Spain
| | - Eva Fernandez
- Department of Pathology, Hospital Clinic, IDIBAPS, University of Barcelona, Barcelona, Spain
| | - Lluis Colomo
- Department of Pathology, Hospital Clinic, IDIBAPS, University of Barcelona, Barcelona, Spain
| | | | - Pau Abrisqueta
- Laboratory of Experimental Hematology, Department of Hematology, Vall d'Hebron University Hospital, Universitat Autonòma de Barcelona, Barcelona, Spain
| | - Francesc Bosch
- Laboratory of Experimental Hematology, Department of Hematology, Vall d'Hebron University Hospital, Universitat Autonòma de Barcelona, Barcelona, Spain.
| | - Marta Crespo
- Laboratory of Experimental Hematology, Department of Hematology, Vall d'Hebron University Hospital, Universitat Autonòma de Barcelona, Barcelona, Spain
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Calpe E, Purroy N, Carpio C, Abrisqueta P, Carabia J, Palacio C, Castellví J, Crespo M, Bosch F. ZAP-70 promotes the infiltration of malignant B-lymphocytes into the bone marrow by enhancing signaling and migration after CXCR4 stimulation. PLoS One 2013; 8:e81221. [PMID: 24312539 PMCID: PMC3849145 DOI: 10.1371/journal.pone.0081221] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2013] [Accepted: 10/09/2013] [Indexed: 12/30/2022] Open
Abstract
ZAP-70 in chronic lymphocytic leukemia (CLL) is associated with enhanced response to microenvironmental stimuli. We analyzed the functional consequences of ZAP-70 ectopic expression in malignant B-cells in a xenograft mouse model of disseminated B-cell leukemia. Mice injected with B-cells expressing ZAP-70 showed a prominently higher infiltration of the bone marrow. In vitro analysis of the response of malignant B-cells to CXCL12, the main attracting chemokine regulating trafficking of lymphocytes to the bone marrow, or to bone marrow stromal cells, revealed that ZAP-70 induces an increased response in terms of signaling and migration. These effects are probably mediated by direct participation of ZAP-70 in CXCL12-CXCR4 signaling since CXCR4 stimulation led to activation of ZAP-70 and downstream signaling pathways, such as MAPK and Akt, whereas ZAP-70 did not alter the expression of the CXCR4 receptor. In addition, subclones of primary CLL cells with high expression of ZAP-70 also showed increased migrative capacity toward CXCL12. Neutralization of CXCR4 with a monoclonal antibody resulted in impaired in vitro responses to CXCL12 and bone marrow stromal cells. We conclude that ZAP-70 enhances the migration of malignant B-cells into the supportive microenvironment found in the bone marrow mainly by enhancing signaling and migration after CXCR4 stimulation.
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Affiliation(s)
- Eva Calpe
- Laboratory of Experimental Hematology, Department of Hematology, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Noelia Purroy
- Laboratory of Experimental Hematology, Department of Hematology, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Cecilia Carpio
- Laboratory of Experimental Hematology, Department of Hematology, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Pau Abrisqueta
- Laboratory of Experimental Hematology, Department of Hematology, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Júlia Carabia
- Laboratory of Experimental Hematology, Department of Hematology, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Carles Palacio
- Laboratory of Experimental Hematology, Department of Hematology, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Josep Castellví
- Department of Pathology, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Marta Crespo
- Laboratory of Experimental Hematology, Department of Hematology, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Francesc Bosch
- Laboratory of Experimental Hematology, Department of Hematology, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
- * E-mail:
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Baptista MJ, Muntañola A, Calpe E, Abrisqueta P, Salamero O, Fernández E, Codony C, Giné E, Kalko SG, Crespo M, Bosch F. Differential gene expression profile associated to apoptosis induced by dexamethasone in CLL cells according to IGHV/ZAP-70 status. Clin Cancer Res 2012; 18:5924-33. [PMID: 22966019 DOI: 10.1158/1078-0432.ccr-11-2771] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
PURPOSE Glucocorticoids are part of the therapeutic armamentarium of chronic lymphocytic leukemia (CLL) where it has been suggested that cells with unmutated IGHV genes exhibit higher sensitivity. The mechanisms by which glucocorticoids are active in CLL are not well elucidated. We aimed to ascertain the activity of dexamethasone in CLL cells according to prognosis and to identify the molecular mechanisms that are influencing the response to this drug. EXPERIMENTAL DESIGN Sensitivity to dexamethasone was analyzed ex vivo in 50 CLL and compared according to IGHV mutational status and/or ZAP-70 expression. The response was further compared by gene expression profiling (GEP) of selected cases. Expression of genes of interest was validated by quantitative reverse transcriptase PCR. RESULTS Response to dexamethasone was higher in cases with unmutated IGHV/high ZAP-70 expression, and the levels of induction of the pro-apoptotic Bim protein correlated with the degree of cell death. GEP analysis showed few genes differentially expressed after dexamethasone treatment between mutated and unmutated cases. However, functional annotation analysis showed that unmutated cases had significant enrichment in terms related to apoptosis. Specific analysis of genes of interest conducted in a large series disclosed that in unmutated IGHV cells, FKBP5 expression was higher at baseline and after dexamethasone exposure and that GILZ was more induced by dexamethasone treatment in these cases. CONCLUSIONS Unmutated IGHV/high ZAP-70 CLL cells exhibit better response to dexamethasone treatment, which is accompanied by a differential expression of genes involved in the glucocorticoid receptor pathway and by an increased induction of genes related to apoptosis.
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Affiliation(s)
- Maria Joao Baptista
- Laboratory of Experimental Hematology, Department of Hematology, Vall d'Hebron University Hospital, Universitat Autònoma de Barcelona, Barcelona, Spain
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Calpe E, Purroy N, Abrisqueta P, Carpio C, Palacio C, Gallur L, Castellvi J, Crespo M, Bosch F. Abstract 1344: ZAP-70 enhances migration of malignant B lymphocytes toward lymphoid organs in a Burkitt lymphoma xenograft model. Cancer Res 2012. [DOI: 10.1158/1538-7445.am2012-1344] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
Chronic Lymphocytic Leukemia (CLL) is a lymphoproliferative disease characterized by the accumulation and proliferation of mature B-lymphocytes in the blood, bone marrow and secondary lymphoid organs. CLL patients with adverse outcome prognosis can be identified by the presence of a high ZAP-70 expression. ZAP-70, a protein tyrosine kinase that plays a crucial role in cellular activation in T and NK cells, has been related to aggressive features of the CLL cells, such as higher migrative capacity in vitro. In order to analyze the consequences of ZAP-70 ectopic expression in an in vivo model, we stably transfected a Burkitt cell line (Raji) with a vector expressing a ZAP-70-GFP fusion protein. Raji transfectants showed constitutively active ZAP-70 protein. Subsequently, thirty-four 8-week old SCID mice were inoculated intravenously with 5 x106 cells from each cell line (control Raji-GFP, 12 mice; Raji-ZAP-70-GFP, 9 mice). Mice were euthanized when hind legs paralysis, dyspnea, or tumor growth was observed. Organs were obtained to quantify the percentage of GFP-positive cells present in each organ by flow cytometry. Median survival of mice injected with the ZAP-70 cell line did not differ from that observed in the control mice (16 days, p=0.658). Percentage of GFP positive cells was analyzed by flow cytometry in different tissue compartments (Table 1). We observed a significantly higher percentage of infiltrating GFP-positive cells in the bone marrow from mice injected with ZAP-70 expressing cell line (58.8%±6.08 vs 4.2%±1.4, p<0.001), whereas in the rest of organs the infiltration was comparable (Table 1). Raji-ZAP-70-GFP has a differential expression of CCR7 and CD49d among others (Calpe et al, Blood 2011). In conclusion, malignant B-lymphocytes with ectopic expression of activated ZAP-70 protein showed enhanced ability to migrate toward and infiltrate the bone marrow, where soluble factors are produced to mediate homing, survival, and proliferation of tumor cells.
Citation Format: {Authors}. {Abstract title} [abstract]. In: Proceedings of the 103rd Annual Meeting of the American Association for Cancer Research; 2012 Mar 31-Apr 4; Chicago, IL. Philadelphia (PA): AACR; Cancer Res 2012;72(8 Suppl):Abstract nr 1344. doi:1538-7445.AM2012-1344
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Affiliation(s)
- Eva Calpe
- 1University Hospital Vall d'Hebron, Barcelona, Spain
| | - Noelia Purroy
- 1University Hospital Vall d'Hebron, Barcelona, Spain
| | | | | | | | - Laura Gallur
- 1University Hospital Vall d'Hebron, Barcelona, Spain
| | | | - Marta Crespo
- 1University Hospital Vall d'Hebron, Barcelona, Spain
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Giné E, Crespo M, Muntañola A, Calpe E, Baptista MJ, Villamor N, Montserrat E, Bosch F. Induction of histone H1.2 cytosolic release in chronic lymphocytic leukemia cells after genotoxic and non-genotoxic treatment. Haematologica 2008; 93:75-82. [PMID: 18166788 DOI: 10.3324/haematol.11546] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND The aim of this study was to analyze whether in chronic lymphocytic leukemia the cytosolic release of histone H1.2, a new apoptogenic mechanism induced by DNA damage, was associated with the presence of genetic abnormalities and with the response to treatment. DESIGN AND METHODS Primary tumoral chronic lymphocytic leukemia cells from 25 patients were investigated for histone H1.2 cytosolic release after treatment with genotoxic (fludarabine, mitoxantrone, etoposide, or X-ray radiation) and non-genotoxic (dexamethasone) agents. Cases were analyzed for the presence of poor-risk genetic alterations, particularly deletions at 17p13 and 11q22. Histone H1.2 release was correlated with the presence of genetic abnormalities and with the best clinical response obtained with standard treatments. RESULTS DNA-damaging agents induced H1.2 release in a p53-dependent manner which was confirmed by the lack of H1.2 release in p53-deleted cases. Non-DNA-damaging agents induced release of H1.2 in both p53-deleted and non-deleted chronic lymphocytic leukemia cases. Moreover, nuclear H1.2 release was observed after genotoxic and non-genotoxic treatment independently of ATM function. From a clinical standpoint, the lack of histone H1.2 release correlated with resistance to genotoxic treatment. CONCLUSIONS In chronic lymphocytic leukemia cells, histone H1.2 traffic was dependent on the p53-status after genotoxic treatment, but could also be induced after treatments that acted independently of p53. By contrast, histone H1.2 release did not seem to be dependent on ATM function. Nuclear histone H1.2 release appears to be an important element in apoptosis induction in chronic lymphocytic leukemia, particularly in cases with abnormal p53 function resistant to conventional treatment.
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Affiliation(s)
- Eva Giné
- Department of Hematology, Laboratory of Experimental Hematology, Institut d'Investigacions Biomèdiques August Pi i Sunyer (IDIBAPS), Hospital Clínic, University of Barcelona, Barcelona, Spain
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