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Immunomodulatory effects of different intravenous immunoglobulin preparations in chronic lymphocytic leukemia. Sci Rep 2021; 11:12926. [PMID: 34155276 PMCID: PMC8217488 DOI: 10.1038/s41598-021-92412-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2020] [Accepted: 06/10/2021] [Indexed: 11/08/2022] Open
Abstract
Hypogammaglobulinemia is the most frequently observed immune defect in chronic lymphocytic leukemia (CLL). Although CLL patients usually have low serum levels of all isotypes (IgG, IgM and IgA), standard immunoglobulin (Ig) preparations for replacement therapy administrated to these patients contain more than 95% of IgG. Pentaglobin is an Ig preparation of intravenous application (IVIg) enriched with IgM and IgA (IVIgGMA), with the potential benefit to restore the Ig levels of all isotypes. Because IVIg preparations at high doses have well-documented anti-inflammatory and immunomodulatory effects, we aimed to evaluate the capacity of Pentaglobin and a standard IVIg preparation to affect leukemic and T cells from CLL patients. In contrast to standard IVIg, we found that IVIgGMA did not modify T cell activation and had a lower inhibitory effect on T cell proliferation. Regarding the activation of leukemic B cells through BCR, it was similarly reduced by both IVIgGMA and IVIgG. None of these IVIg preparations modified spontaneous apoptosis of T or leukemic B cells. However, the addition of IVIgGMA on in vitro cultures decreased the apoptosis of T cells induced by the BCL-2 inhibitor, venetoclax. Importantly, IVIgGMA did not impair venetoclax-induced apoptosis of leukemic B cells. Overall, our results add new data on the effects of different preparations of IVIg in CLL, and show that the IgM/IgA enriched preparation not only affects relevant mechanisms involved in CLL pathogenesis but also has a particular profile of immunomodulatory effects on T cells that deserves further investigation.
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Bosch R, Mora A, Vicente EP, Ferrer G, Jansà S, Damle R, Gorlatov S, Rai K, Montserrat E, Nomdedeu J, Pratcorona M, Blanco L, Saavedra S, Garrido A, Esquirol A, Garcia I, Granell M, Martino R, Delgado J, Sierra J, Chiorazzi N, Moreno C. FcγRIIb expression in early stage chronic lymphocytic leukemia. Leuk Lymphoma 2017; 58:2642-2648. [PMID: 28372509 DOI: 10.1080/10428194.2017.1307981] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
In normal B-cells, B-cell antigen receptor (BCR) signaling can be negatively regulated by the low-affinity receptor FcγRIIb (CD32b). To better understand the role of FcγRIIb in chronic lymphocytic leukemia (CLL), we correlated its expression on 155 samples from newly-diagnosed Binet A patients with clinical characteristics and outcome. FcγRIIb expression was similar in normal B-cells and leukemic cells, this being heterogenous among patients and within CLL clones. FcγRIIb expression did not correlate with well known prognostic markers [disease stage, serum beta-2 microglobulin (B2M), IGHV mutational status, expression of ZAP-70 and CD38, and cytogenetics] except for a weak concordance with CD49d. Moreover, patients with low FcγRIIb expression (69/155, 44.5%) required therapy earlier than those with high FcγRIIb expression (86/155, 55.5%) (median 151.4 months vs. not reached; p=.071). These results encourage further investigation on the role of FcγRIIb in CLL biology and prognostic significance in larger series of patients.
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Affiliation(s)
- Rosa Bosch
- a Laboratory of Oncology/Hematology and Transplantation , Institute of Biomedical Research, IIB Sant Pau , Barcelona , Spain.,b Department of Hematology , Hospital de la Santa Creu i Sant Pau, Autonomous University of Barcelona , Barcelona , Spain
| | - Alba Mora
- a Laboratory of Oncology/Hematology and Transplantation , Institute of Biomedical Research, IIB Sant Pau , Barcelona , Spain.,b Department of Hematology , Hospital de la Santa Creu i Sant Pau, Autonomous University of Barcelona , Barcelona , Spain
| | - Eva Puy Vicente
- a Laboratory of Oncology/Hematology and Transplantation , Institute of Biomedical Research, IIB Sant Pau , Barcelona , Spain.,b Department of Hematology , Hospital de la Santa Creu i Sant Pau, Autonomous University of Barcelona , Barcelona , Spain
| | - Gerardo Ferrer
- c Karches Centre for Chronic Lymphocytic Leukemia Research, The Feinstein Institute for Medical Research , Manhasset , NY , USA
| | - Sonia Jansà
- d Department of Human Anatomy and Embryology , University of Barcelona , Barcelona , Spain
| | - Rajendra Damle
- c Karches Centre for Chronic Lymphocytic Leukemia Research, The Feinstein Institute for Medical Research , Manhasset , NY , USA
| | | | - Kanti Rai
- f Haematology/Oncology, Oncology LIJ Medical Centre , Lake Success , NY , USA
| | - Emili Montserrat
- g Department of Hematology , Institute of Hematology and Oncology, Hospital Clínic, IDIBAPS , Barcelona , Spain
| | - Josep Nomdedeu
- h Laboratory of Hematology , Hospital de la Santa Creu i Sant Pau , Barcelona , Spain
| | - Marta Pratcorona
- h Laboratory of Hematology , Hospital de la Santa Creu i Sant Pau , Barcelona , Spain
| | - Laura Blanco
- h Laboratory of Hematology , Hospital de la Santa Creu i Sant Pau , Barcelona , Spain
| | - Silvana Saavedra
- b Department of Hematology , Hospital de la Santa Creu i Sant Pau, Autonomous University of Barcelona , Barcelona , Spain
| | - Ana Garrido
- b Department of Hematology , Hospital de la Santa Creu i Sant Pau, Autonomous University of Barcelona , Barcelona , Spain
| | - Albert Esquirol
- b Department of Hematology , Hospital de la Santa Creu i Sant Pau, Autonomous University of Barcelona , Barcelona , Spain
| | - Irene Garcia
- b Department of Hematology , Hospital de la Santa Creu i Sant Pau, Autonomous University of Barcelona , Barcelona , Spain
| | - Miquel Granell
- b Department of Hematology , Hospital de la Santa Creu i Sant Pau, Autonomous University of Barcelona , Barcelona , Spain
| | - Rodrigo Martino
- b Department of Hematology , Hospital de la Santa Creu i Sant Pau, Autonomous University of Barcelona , Barcelona , Spain
| | - Julio Delgado
- g Department of Hematology , Institute of Hematology and Oncology, Hospital Clínic, IDIBAPS , Barcelona , Spain
| | - Jorge Sierra
- a Laboratory of Oncology/Hematology and Transplantation , Institute of Biomedical Research, IIB Sant Pau , Barcelona , Spain.,b Department of Hematology , Hospital de la Santa Creu i Sant Pau, Autonomous University of Barcelona , Barcelona , Spain
| | - Nicholas Chiorazzi
- c Karches Centre for Chronic Lymphocytic Leukemia Research, The Feinstein Institute for Medical Research , Manhasset , NY , USA
| | - Carol Moreno
- a Laboratory of Oncology/Hematology and Transplantation , Institute of Biomedical Research, IIB Sant Pau , Barcelona , Spain.,b Department of Hematology , Hospital de la Santa Creu i Sant Pau, Autonomous University of Barcelona , Barcelona , Spain
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Nguyen TH, Havari E, McLaren R, Zhang M, Jiang Y, Madden SL, Roberts B, Kaplan J, Shankara S. Alemtuzumab induction of intracellular signaling and apoptosis in malignant B lymphocytes. Leuk Lymphoma 2011; 53:699-709. [PMID: 21916527 DOI: 10.3109/10428194.2011.623253] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
The molecular changes induced by alemtuzumab following binding of CD52 on B tumor cells were investigated. Alemtuzumab alone had no detectable impact on cell signaling but cross-linking of alemtuzumab on the surface of B tumor lines with anti-human Fc antibodies induced a transient Ca(2+) flux followed by phosphorylation of several kinases involved in stress and survival pathways, and expression of associated proteins including TNF-α. Cross-linking of alemtuzumab also induced capping and caspase-dependent apoptosis of the tumor lines. When using primary cells from B-CLL patients, alemtuzumab alone was capable of inducing protein phosphorylation and apoptosis through the cross-linking of alemtuzumab by FcγRIIb receptors on B-CLL cells. Apoptosis was prevented by blocking of FcγRIIb receptors with anti-CD32 antibody. Overall, our results indicate that cross-linking of alemtuzumab on B tumor cells can occur naturally through Fc receptor interaction and leads to the activation of specific cellular pathways and induction of apoptosis.
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Dunn-Siegrist I, Leger O, Daubeuf B, Poitevin Y, Dépis F, Herren S, Kosco-Vilbois M, Dean Y, Pugin J, Elson G. Pivotal involvement of Fcgamma receptor IIA in the neutralization of lipopolysaccharide signaling via a potent novel anti-TLR4 monoclonal antibody 15C1. J Biol Chem 2007; 282:34817-27. [PMID: 17921137 DOI: 10.1074/jbc.m706440200] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
The mammalian Toll-like receptor (TLR) family has evolved to sense pathogens in the environment and protect the host against infection. TLR4 recognizes lipopolysaccharide (LPS) from Gram-negative bacteria and induces a signaling cascade that, when exaggerated, has been associated with severe sepsis. We have generated a TLR4-specific monoclonal antibody, 15C1, which neutralizes LPS-induced TLR4 activation in a dose-dependent manner. 15C1 potently blocks the effects of LPS on a panel of primary cells and cell lines in vitro. The binding of 15C1 was mapped to an epitope in the second portion of the extracellular region of TLR4, which has been shown previously to be functionally important in the recognition of LPS. Furthermore, we demonstrate a novel mechanism of inhibition, as the effects of 15C1 are partially Fc-dependent, involving the regulatory Fcgamma receptor IIA (CD32A). In addition to introducing 15C1 as a potent clinical candidate for use in the treatment of LPS-mediated indications, our work demonstrates a newly discovered pathway whose manipulation is pivotal in achieving optimal neutralizing benefit.
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Gamberale R, Fernández-Calotti P, Sanjurjo J, Arrossagaray G, Avalos JS, Geffner J, Giordano M. Signaling capacity of FcγRII isoforms in B-CLL cells. Leuk Res 2005; 29:1277-84. [PMID: 15908001 DOI: 10.1016/j.leukres.2005.04.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2005] [Indexed: 11/17/2022]
Abstract
Two main isoforms of Fcgamma receptor II (CD 32) have been described in humans: activatory FcgammaRIIA and inhibitory FcgammaRIIB. We have previously reported that B cells from a subset of chronic lymphocytic leukemia (B-CLL) patients express not only FcgammaRIIB, as normal B lymphocytes, but also the myeloid FcgammaRIIA. The aim of this study was to evaluate the signaling capacity of both FcgammaRII isoforms in B-CLL cells. We found that FcgammaRIIA expressed by leukemic cells failed to induce Ca(2+) mobilization or protein tyrosine phosphorylation, suggesting that the receptor is not functional. By contrast, FcgammaRIIB effectively diminished BCR-triggered ERK 1 phosphorylation, which indicates that it is able to transduce inhibitory signals in B-CLL cells. Moreover, we found that FcgammaRIIB homoaggregation in either B-CLL or non-malignant tonsillar B cells did not result in apoptosis as was reported for murine B splenocytes. Together, these results show that FcgammaRIIB, but not FcgammaRIIA is biologically active in B-CLL cells and might influence leukemic cell physiology in vivo.
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Affiliation(s)
- Romina Gamberale
- Laboratorio de Inmunología, Instituto de Investigaciones Hematológicas, Academia Nacional de Medicina, Pacheco de Melo 3081, 1425 Buenos Aires, Argentina.
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Abstract
The activation threshold of cells in the immune system is often tuned by cell surface molecules. The Fc receptors expressed on various hematopoietic cells constitute critical elements for activating or downmodulating immune responses and combines humoral and cell-mediated immunity. Thus, Fc receptors are the intelligent sensors of the immune status in the individual. However, impaired regulation by Fc receptors will lead to unresponsiveness or hyperreactivity to foreign as well as self-antigens. Murine models for autoimmune disease indicate the indispensable roles of the inhibitory Fc receptor in the suppression of such disorders, whereas activating-type FcRs are crucial for the onset and exacerbation of the disease. The development of many autoimmune diseases in humans may be caused by impairment of the human Fc receptor regulatory system. This review is aimed at providing a current overview of the mechanism of Fc receptor-based immune regulation and the possible scenario of how autoimmune disease might result from their dysfunction.
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Affiliation(s)
- Toshiyuki Takai
- Department of Experimental Immunology and CREST Program of Japan Science and Technology Agency, Institute of Development, Aging and Cancer, Tohoku University, Sendai 980-8575, Japan.
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Boruchov AM, Heller G, Veri MC, Bonvini E, Ravetch JV, Young JW. Activating and inhibitory IgG Fc receptors on human DCs mediate opposing functions. J Clin Invest 2005; 115:2914-23. [PMID: 16167082 PMCID: PMC1201664 DOI: 10.1172/jci24772] [Citation(s) in RCA: 266] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2005] [Accepted: 06/28/2005] [Indexed: 11/17/2022] Open
Abstract
Human monocyte-derived DCs (moDCs) and circulating conventional DCs coexpress activating (CD32a) and inhibitory (CD32b) isoforms of IgG Fcgamma receptor (FcgammaR) II (CD32). The balance between these divergent receptors establishes a threshold of DC activation and enables immune complexes to mediate opposing effects on DC maturation and function. IFN-gamma most potently favors CD32a expression on immature DCs, whereas soluble antiinflammatory concentrations of monomeric IgG have the opposite effect. Ligation of CD32a leads to DC maturation, increased stimulation of allogeneic T cells, and enhanced secretion of inflammatory cytokines, with the exception of IL-12p70. Coligation of CD32b limits activation through CD32a and hence reduces the immunogenicity of moDCs even for a strong stimulus like alloantigen. Targeting CD32b alone does not mature or activate DCs but rather maintains an immature state. Coexpression of activating and inhibitory FcgammaRs by DCs reveals a homeostatic checkpoint for inducing tolerance or immunity by immune complexes. These findings have important implications for understanding the pathophysiology of immune complex diseases and for optimizing the efficacy of therapeutic mAbs. The data also suggest novel strategies for targeting antigens to the activating or inhibitory FcgammaRs on human DCs to generate either antigen-specific immunity or tolerance.
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Affiliation(s)
- Adam M Boruchov
- Laboratory of Cellular Immunobiology, Hematology Service, Division of Hematologic Oncology, Department of Medicine, Memorial Sloan-Kettering Cancer Center, New York, New York 10021, USA.
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