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Ibraheem K, Yhmed AMA, Nasef MM, Georgopoulos NT. TRAF3/p38-JNK Signalling Crosstalk with Intracellular-TRAIL/Caspase-10-Induced Apoptosis Accelerates ROS-Driven Cancer Cell-Specific Death by CD40. Cells 2022; 11:cells11203274. [PMID: 36291141 PMCID: PMC9600997 DOI: 10.3390/cells11203274] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2022] [Revised: 10/14/2022] [Accepted: 10/14/2022] [Indexed: 12/03/2022] Open
Abstract
The capacity to induce tumour-cell specific apoptosis represents the most unique feature of the TNF receptor (TNFR) family member CD40. Recent studies on the signalling events triggered by its membrane-presented ligand CD40L (mCD40L) in normal and malignant epithelial cells have started to unravel an exquisite context and cell type specificity for the functional effects of CD40. Here, we demonstrate that, in comparison to other carcinomas, mCD40L triggered strikingly more rapid apoptosis in colorectal carcinoma (CRC) cells, underpinned by its ability to entrain two concurrently operating signalling axes. CD40 ligation initially activates TNFR-associated factor 3 (TRAF3) and subsequently NADPH oxidase (NOX)/Apoptosis signal-regulating kinase 1 (ASK1)-signalling and induction of reactive oxygen species (ROS) to mediate p38/JNK- and ROS-dependent cell death. At that point, p38/JNK signalling directly activates the mitochondrial pathway, and triggers rapid induction of intracellular TNF-related apoptosis-inducing ligand (TRAIL) that signals from internal compartments to initiate extrinsic caspase-10-asscociated apoptosis, leading to truncated Bid (tBid)-activated mitochondrial signalling. p38 and JNK are essential both for direct mitochondrial apoptosis induction and the TRAIL/caspase-10/tBid pathway, but their involvement follows functional hierarchy and temporally controlled interplay, as p38 function is required for JNK phosphorylation. By engaging both intrinsic and extrinsic pathways to activate apoptosis via two signals simultaneously, CD40 can accelerate CRC cell death. Our findings further unravel the multi-faceted properties of the CD40/mCD40L dyad, highlighted by the novel TNFR crosstalk that accelerates tumour cell-specific death, and may have implications for the use of CD40 as a therapeutic target.
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Affiliation(s)
- Khalidah Ibraheem
- Department of Biological Sciences, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK
| | - Albashir M. A. Yhmed
- Department of Biological Sciences, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK
- Department of Medical Laboratory Sciences, Faculty of Medical Technology, Wadi Alshatti University, Wadi Alshatti P.O. Box 68, Libya
| | - Mohamed M. Nasef
- Department of Biological Sciences, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK
| | - Nikolaos T. Georgopoulos
- Department of Biological Sciences, School of Applied Sciences, University of Huddersfield, Queensgate, Huddersfield HD1 3DH, UK
- Correspondence: ; Tel.: +44-(0)1484-25-6860
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2
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Elmetwali T, Salman A, Wei W, Hussain SA, Young LS, Palmer DH. CD40L membrane retention enhances the immunostimulatory effects of CD40 ligation. Sci Rep 2020; 10:342. [PMID: 31941968 PMCID: PMC6962220 DOI: 10.1038/s41598-019-57293-y] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2019] [Accepted: 12/24/2019] [Indexed: 12/22/2022] Open
Abstract
In carcinomas, the nature of CD40 ligand shapes the outcome of CD40 ligation. To date, the consequences of membrane-bound CD40L (mCD40L) on its immune-stimulatory function are unknown. Here, we examined the impact of mCD40L versus soluble CD40L (sCD40L) on T24 bladder carcinoma gene expression profiling. Of 410 differentially expressed genes, 286 were upregulated and 124 downregulated by mCD40L versus sCD40L. Gene ontology enrichment analysis revealed immune-stimulatory function as the most significant enriched biological process affected by upregulated transcripts, while those downregulated were critical for cell growth and division. Furthermore, immature dendritic cells (iDC) responded to mCD40L with enhanced maturation and activation over sCD40L evidenced by higher expression levels of CD83, CD86, HLA-DR and CD54, increased secretion of IL12 and IL10 and higher tumour-antigen (TA) uptake capacity. Furthermore, autologus CD3+ T cells responded to TA-loaded mCD40L-activated DC with increased proliferation and cytotoxic response (CD107a and IFN-γ-producing CD3+ CD8+ T cells) to the tumour-loaded autologous PBMCs compared to sCD40L. Thus, these data indicate that mCD40L enhances the immunostimulatory capacity over sCD40L. Furthermore, the ability of mCD40L to also directly induce cell death in CD40-expressing carcinomas, subsequently releasing tumour-specific antigens into the tumour microenvironment highlights the potential for mCD40L as a multi-faceted anti-cancer immunotherapeutic.
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Affiliation(s)
- Taha Elmetwali
- Institute of Translational Medicine, Department of Molecular and Clinical Cancer Medicine, University of Liverpool, 2nd Floor Sherrington Building, Ashton Street, Liverpool, L69 3GE, UK.
| | - Asmaa Salman
- Institute of Translational Medicine, Department of Molecular and Clinical Cancer Medicine, University of Liverpool, 2nd Floor Sherrington Building, Ashton Street, Liverpool, L69 3GE, UK
- National Research Centre, 12662, Dokki, Giza, Egypt
| | - Wenbin Wei
- Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, B15 2TT, UK
- Department of Biosciences, Durham University, Durham, DH1 3LE, UK
| | - Syed A Hussain
- Sheffield Academic Unit of Oncology Department of Oncology and Metabolism Medical School, University of Sheffield, Sheffield, S10 2 RX, UK
| | - Lawrence S Young
- Warwick Medical School, University of Warwick, Coventry, CV4 7AL, UK
| | - Daniel H Palmer
- Institute of Translational Medicine, Department of Molecular and Clinical Cancer Medicine, University of Liverpool, 2nd Floor Sherrington Building, Ashton Street, Liverpool, L69 3GE, UK
- Clatterbridge Cancer Centre NHS Foundation Trust, Clatterbridge Road, Bebington, Wirral, CH63 4JY, UK
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Dunnill CJ, Ibraheem K, Mohamed A, Southgate J, Georgopoulos NT. A redox state-dictated signalling pathway deciphers the malignant cell specificity of CD40-mediated apoptosis. Oncogene 2016; 36:2515-2528. [PMID: 27869172 PMCID: PMC5422712 DOI: 10.1038/onc.2016.401] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 09/08/2016] [Accepted: 09/16/2016] [Indexed: 12/19/2022]
Abstract
CD40, a member of the tumour necrosis factor receptor (TNFR) superfamily, has the capacity to cause extensive apoptosis in carcinoma cells, while sparing normal epithelial cells. Yet, apoptosis is only achieved by membrane-presented CD40 ligand (mCD40L), as soluble receptor agonists are but weakly pro-apoptotic. Here, for the first time we have identified the precise signalling cascade underpinning mCD40L-mediated death as involving sequential TRAF3 stabilisation, ASK1 phosphorylation, MKK4 (but not MKK7) activation and JNK/AP-1 induction, leading to a Bak- and Bax-dependent mitochondrial apoptosis pathway. TRAF3 is central in the activation of the NADPH oxidase (Nox)-2 component p40phox and the elevation of reactive oxygen species (ROS) is essential in apoptosis. Strikingly, CD40 activation resulted in down-regulation of Thioredoxin (Trx)-1 to permit ASK1 activation and apoptosis. Although soluble receptor agonist alone could not induce death, combinatorial treatment incorporating soluble CD40 agonist and pharmacological inhibition of Trx-1 was functionally equivalent to the signal triggered by mCD40L. Finally, we demonstrate using normal, ‘para-malignant' and tumour-derived cells that progression to malignant transformation is associated with increase in oxidative stress in epithelial cells, which coincides with increased susceptibility to CD40 killing, while in normal cells CD40 signalling is cytoprotective. Our studies have revealed the molecular nature of the tumour specificity of CD40 signalling and explained the differences in pro-apoptotic potential between soluble and membrane-bound CD40 agonists. Equally importantly, by exploiting a unique epithelial culture system that allowed us to monitor alterations in the redox-state of epithelial cells at different stages of malignant transformation, our study reveals how pro-apoptotic signals can elevate ROS past a previously hypothesised ‘lethal pro-apoptotic threshold' to induce death; an observation that is both of fundamental importance and carries implications for cancer therapy.
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Affiliation(s)
- C J Dunnill
- Department of Biological Sciences, School of Applied Sciences, University of Huddersfield, Huddersfield, UK
| | - K Ibraheem
- Department of Biological Sciences, School of Applied Sciences, University of Huddersfield, Huddersfield, UK
| | - A Mohamed
- Department of Biological Sciences, School of Applied Sciences, University of Huddersfield, Huddersfield, UK
| | - J Southgate
- Jack Birch Unit of Molecular Carcinogenesis, Department of Biology, University of York, York, UK
| | - N T Georgopoulos
- Department of Biological Sciences, School of Applied Sciences, University of Huddersfield, Huddersfield, UK
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Kong S, Thiruppathi M, Qiu Q, Lin Z, Dong H, Chini EN, Prabhakar BS, Fang D. DBC1 is a suppressor of B cell activation by negatively regulating alternative NF-κB transcriptional activity. THE JOURNAL OF IMMUNOLOGY 2014; 193:5515-24. [PMID: 25362179 DOI: 10.4049/jimmunol.1401798] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
CD40 and BAFFR signaling play important roles in B cell proliferation and Ig production. In this study, we found that B cells from mice with deletion of Dbc1 gene (Dbc1(-/-)) show elevated proliferation, and IgG1 and IgA production upon in vitro CD40 and BAFF, but not BCR and LPS stimulation, indicating that DBC1 inhibits CD40/BAFF-mediated B cell activation in a cell-intrinsic manner. Microarray analysis and chromatin immunoprecipitation experiments reveal that DBC1 inhibits B cell function by selectively suppressing the transcriptional activity of alternative NF-κB members RelB and p52 upon CD40 stimulation. As a result, when immunized with nitrophenylated-keyhole limpet hemocyanin, Dbc1(-/-) mice produce significantly increased levels of germinal center B cells, plasma cells, and Ag-specific Ig. Finally, loss of DBC1 in mice leads to higher susceptibility to experimental autoimmune myasthenia gravis. Our study identifies DBC1 as a novel regulator of B cell activation by suppressing the alternative NF-κB pathway.
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Affiliation(s)
- Sinyi Kong
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Muthusamy Thiruppathi
- Department of Microbiology and Immunology, University of Illinois College of Medicine, Chicago, Chicago, IL 60612
| | - Quan Qiu
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Zhenghong Lin
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611
| | - Hongxin Dong
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611; Department of Psychiatry and Behavioral Sciences, Northwestern University Feinberg School of Medicine, Chicago, IL 60611; and
| | - Eduardo N Chini
- Laboratory of Signal Transduction, Department of Anesthesiology and Robert and Arlene Kogod Center on Aging, Mayo Clinic College of Medicine, Rochester, MN 55905
| | - Bellur S Prabhakar
- Department of Microbiology and Immunology, University of Illinois College of Medicine, Chicago, Chicago, IL 60612
| | - Deyu Fang
- Department of Pathology, Northwestern University Feinberg School of Medicine, Chicago, IL 60611;
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Miliara S, Gkouskou KK, Sharp TV, Eliopoulos AG. SUMOylation is required for optimal TRAF3 signaling capacity. PLoS One 2013; 8:e80470. [PMID: 24260396 PMCID: PMC3832365 DOI: 10.1371/journal.pone.0080470] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2013] [Accepted: 10/03/2013] [Indexed: 12/15/2022] Open
Abstract
TNF receptor-associated factors (TRAFs) are multifunctional adaptor proteins involved in temporal and spatial coordination of signals necessary for normal immune function. Here, we report that TRAF3, a TRAF family member with a key role in Toll-like and TNF family receptor signaling and suppressor of lymphomagenesis, is post-translationally modified by the small ubiquitin-related modifier (SUMO). Through yeast two-hybrid and co-immunoprecipitation assays we have identified Ubc9, the SUMO conjugating enzyme, as a novel TRAF3-interacting protein. We show that Ubc9-dependent SUMOylation of TRAF3 modulates optimal association with the CD40 receptor, thereby influencing TRAF3 degradation and non-canonical NF-κB activation upon CD40 triggering. Collectively, our findings describe a novel post-translational modification of a TRAF family member and reveal a link between SUMOylation and TRAF-mediated signal transduction.
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Affiliation(s)
- Sophia Miliara
- Molecular and Cellular Biology Laboratory, University of Crete School of Medicine, Heraklion, Greece
- Laboratory of Cancer Biology, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology Hellas, Heraklion, Greece
| | - Kalliopi K. Gkouskou
- Molecular and Cellular Biology Laboratory, University of Crete School of Medicine, Heraklion, Greece
- Laboratory of Cancer Biology, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology Hellas, Heraklion, Greece
| | - Tyson V. Sharp
- Barts Cancer Institute, Queen Mary University of London, London, United Kingdom
| | - Aristides G. Eliopoulos
- Molecular and Cellular Biology Laboratory, University of Crete School of Medicine, Heraklion, Greece
- Laboratory of Cancer Biology, Institute of Molecular Biology and Biotechnology, Foundation of Research and Technology Hellas, Heraklion, Greece
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Li R, Chen WC, Pang XQ, Tian WY, Wang WP, Zhang XG. CD40 signal expression in gastric cancer tissue and its correlation with prognosis of gastric cancer patients. Mol Biol Rep 2012; 39:8741-7. [PMID: 22722990 DOI: 10.1007/s11033-012-1734-5] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2012] [Accepted: 06/06/2012] [Indexed: 10/28/2022]
Abstract
CD40 signaling plays a critical role in the survival rate of gastric cancer patients. Tumour samples were collected from 73 patients with who were diagnosed as gastric cancer in general surgery department in the 1st affiliated hospital of Suzhou University between September 2002 and July 2003. All patients had not received radiotherapy and chemotherapy before operation. These patients include 46 male and 27 female. Here we show that CD40 is constitutively expressed in the human gastric carcinoma tissues, and CD40 protein and mRNA positive expression in gastric cancer tissues closely correlated with lymph node metastasis and tumour TNM stage. CD40 positive expression in gastric cancer patients with lymph node metastasis was markedly higher than that in gastric cancer patients without lymph node metastasis. CD40 positive expression in stage III-IV gastric cancer patients was markedly higher than that in stage I-II gastric cancer patients. Moreover, CD40 expression closely correlated with prognosis of gastric cancer patients. Therefore, CD40 was taken as grouping variable, and lymph node metastasis and clinical staging were taken as stratification variables, respectively, further analysis showed that prognosis in gastric cancer patients with lymph node metastasis and CD40 positive expression was markedly worse than that in gastric cancer patients without lymph node metastasis and CD40 negative expression (P = 0.0076). These results suggest that CD40 signaling plays a critical role in the survival of gastric cancer patients.
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Affiliation(s)
- Rui Li
- Department of Gastroenterology, The First Affiliated Hospital of Soochow University, Key Laboratory of Medicine and Clinical Immunology of Jiangsu Province, Suzhou 215006, China
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Matus-Nicodemos R, Vavassori S, Castro-Faix M, Valentin-Acevedo A, Singh K, Marcelli V, Covey LR. Polypyrimidine tract-binding protein is critical for the turnover and subcellular distribution of CD40 ligand mRNA in CD4+ T cells. THE JOURNAL OF IMMUNOLOGY 2011; 186:2164-71. [PMID: 21242519 DOI: 10.4049/jimmunol.1003236] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
CD40L (CD154) is regulated at the posttranscriptional level by an activation-induced process that results in a highly stable transcript at extended times of T cell activation. Transcript stability is mediated by polypyrimidine tract-binding protein (PTB)-containing complexes (complex I and II) that bind to three adjacent CU-rich sequences within the 3' untranslated region. To assess the role of PTB in the expression and distribution of CD40L mRNA, PTB was targeted using short hairpin RNA in both primary T cells and a T cell line that recapitulates the stability phase of regulated CD40L mRNA decay. PTB knockdown resulted in a marked decrease in the mRNA stability that resulted in lowered CD40L surface expression. PTB was also critical for appropriate distribution of CD40L mRNA between the nucleus and cytoplasm and in the cytoplasm between the cytosol and the translating polysomes. The activation-induced formation of PTB-specific ribonucleoprotein complexes was observed only with cytoplasmic and not nuclear PTB indicating functional differences in the protein defined by cellular localization. Finally, we observed that cytoplasmic and nuclear PTB isoforms were differentially modified relative to each other and that the changes in cytoplasmic PTB were consistent with activation-induced phosphorylation. Together this work suggests that differentially modified PTB regulates CD40L expression at multiple steps by 1) retaining CD40L mRNA in the nucleus, 2) directly regulating mRNA stability at late times of activation, and 3) forming a ribonuclear complex that preferentially associates with translating ribosomes thus leading to an enhanced level of CD40L protein.
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Tuning of CD40–CD154 Interactions in Human B-Lymphocyte Activation: A Broad Array of In Vitro Models for a Complex In Vivo Situation. Arch Immunol Ther Exp (Warsz) 2011; 59:25-40. [DOI: 10.1007/s00005-010-0108-8] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2010] [Accepted: 08/19/2010] [Indexed: 12/13/2022]
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Humphreys EH, Williams KT, Adams DH, Afford SC. Primary and malignant cholangiocytes undergo CD40 mediated Fas dependent apoptosis, but are insensitive to direct activation with exogenous Fas ligand. PLoS One 2010; 5:e14037. [PMID: 21103345 PMCID: PMC2984448 DOI: 10.1371/journal.pone.0014037] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Accepted: 10/18/2010] [Indexed: 11/19/2022] Open
Abstract
INTRODUCTION Cholangiocarcinoma is a rare malignancy of the biliary tract, the incidence of which is rising, but the pathogenesis of which remains uncertain. No common genetic defects have been described but it is accepted that chronic inflammation is an important contributing factor. We have shown that primary human cholangiocyte and hepatocyte survival is tightly regulated via co-operative interactions between two tumour necrosis family (TNF) receptor family members; CD40 and Fas (CD95). Functional deficiency of CD154, the ligand for CD40, leads to a failure of clearance of biliary tract infections and a predisposition to cholangiocarcinoma implying a direct link between TNF receptor-mediated apoptosis and the development of cholangiocarcinoma. AIMS To determine whether malignant cholangiocytes display defects in CD40 mediated apoptosis. By comparing CD40 and Fas-mediated apoptosis and intracellular signalling in primary human cholangiocytes and three cholangiocyte cell lines. RESULTS Primary cholangiocytes and cholangiocyte cell lines were relatively insensitive to direct Fas-mediated killing with exogenous FasL when compared with Jurkat cells, which readily underwent Fas-mediated apoptosis, but were extremely sensitive to CD154 stimulation. The sensitivity of cells to CD40 activation was similar in magnitude in both primary and malignant cells and was STAT-3 and AP-1 dependent in both. CONCLUSIONS 1) Both primary and malignant cholangiocytes are relatively resistant to Fas-mediated killing but show exquisite sensitivity to CD154, suggesting that the CD40 pathway is intact and fully functional in both primary and malignant cholangiocytes 2) The relative insensitivity of cholangiocytes to Fas activation demonstrates the importance of CD40 augmentation of Fas dependent death in these cells. Agonistic therapies which target CD40 and associated intracellular signalling pathways may be effective in promoting apoptosis of malignant cholangiocytes.
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Affiliation(s)
- Elizabeth H. Humphreys
- Centre for Liver Research, MRC Centre for Immune Regulation, The Institute of Biomedical Research, University of Birmingham, Birmingham, United Kingdom
| | - Kevin T. Williams
- Centre for Liver Research, MRC Centre for Immune Regulation, The Institute of Biomedical Research, University of Birmingham, Birmingham, United Kingdom
| | - David H. Adams
- Centre for Liver Research, MRC Centre for Immune Regulation, The Institute of Biomedical Research, University of Birmingham, Birmingham, United Kingdom
| | - Simon C. Afford
- Centre for Liver Research, MRC Centre for Immune Regulation, The Institute of Biomedical Research, University of Birmingham, Birmingham, United Kingdom
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Ducas E, Dussault N, Roy A, Dumont N, Néron S. Estimation of the number of CD154 molecules in membrane extracts used as a source of CD40 stimulation of human B lymphocytes. J Immunol Methods 2009; 344:133-7. [PMID: 19332074 DOI: 10.1016/j.jim.2009.03.009] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2008] [Revised: 01/14/2009] [Accepted: 03/19/2009] [Indexed: 10/21/2022]
Abstract
The CD40-CD154 interaction is better exemplified by a rheostat than by an on-off switch, and variations in its intensity can play a role in the regulation of B lymphocyte activation following primary and/or secondary humoral immune response. The CD40-CD154 interaction is often studied in co-culture models using CD154+ adherent cells, which can be problematic when performing protein or gene analyses. The use of membrane extracts prepared from CD154+-transfected cells can eliminate possible interferences caused by the presence of contaminating feeder cells. Given the dose-response effect of CD154 on target B cells, it is important to measure the amount of CD154 when using soluble membranes. We hereby report a simple method, based on cytometry analysis, to estimate the relative number of CD154 molecules in membrane extracts, allowing reproducibility in human B-cell activation level.
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Affiliation(s)
- Eric Ducas
- Héma-Québec, Ingénierie Cellulaire, Recherche et Développement, Québec (Québec), Canada
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Dis-Abl-ing CD40 buys toxic assets. Blood 2008; 112:4787-8. [PMID: 19064735 DOI: 10.1182/blood-2008-10-183012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
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Fecteau JF, Roy A, Néron S. Peripheral blood CD27+ IgG+ B cells rapidly proliferate and differentiate into immunoglobulin-secreting cells after exposure to low CD154 interaction. Immunology 2008; 128:e353-65. [PMID: 19016905 DOI: 10.1111/j.1365-2567.2008.02976.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
In vitro CD40 stimulation of human B cells isolated from lymphoid organs is dominated by memory B cells undergoing faster proliferation and higher differentiation than naive B cells. In contrast, we previously reported that blood memory B cells mainly differentiate into immunoglobulin-secreting cells in response to CD40 stimulation. However, variations in CD40-CD154 interaction are now recognized to influence B-cell fate. In this study, we have compared the in vitro response of blood CD27(-) and CD27(-) IgG(-) to CD27(+) and CD27(+) IgG(+) B cells following low-density exposure to CD154 in the presence of a mixture of interleukin-2 (IL-2), IL-4 and IL-10. The evolution of these cell populations was monitored during initiation and following long-term stimulation. Over a 5-day period, CD27(+) B cells underwent differentiation into immunoglobulin-secreting cells more readily than CD27(-) cells, and CD27(+) IgG(+) B cells gave rise to a near homogeneous population of CD19(+) CD27(++) CD38(+) IgG(lo) cells capable of high immunoglobulin G (IgG) secretion. During the same period, CD27(-) IgG(-) B cells partially became CD19(++) CD27(-) CD38(-) IgG(++) cells but showed no IgG secretion. Long-term stimulation revealed that CD27(+) IgG(+) B cells retained a high expansion capacity and could maintain their momentum towards differentiation over naive B cells. In addition, long-term stimulation was driving CD27(-) IgG(-) and total CD19(+) B cells to evolve into similar CD27(+) and CD27(-) subsets, suggesting naive homeostatic proliferation. Overall, these results tend to reconcile memory B cells from blood and lymphoid organs regarding their preferential differentiation capacity compared to naive cells, and further suggest that circulating memory IgG(+) cells may be intrinsically prone to rapid activation upon appropriate stimulation.
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Affiliation(s)
- Jessie F Fecteau
- Héma-Québec, Ingénierie cellulaire, Recherche et développement, Québec, Canada
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Gordon J, Barnes N, Meredith E, Drayson M. In response to “Selective serotonin reuptake inhibitors—A new modality for the treatment of lymphoma/leukaemia?” by C. Schuster, et al. [Biochem. Pharmacol. 74 (9) 2007 1424–1435]. Biochem Pharmacol 2008; 75:e1-3; author reply e4-5. [DOI: 10.1016/j.bcp.2008.02.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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