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Liu Y, Feng Y, Tang S, Zhang L, Huang Z, Shi X, Fang Y, Yang J, Deng X, Wang L, Liu X, Yuan H. Aberrant expression of inhibitory receptors on B cells in patients with Graves' disease. Hum Immunol 2021; 83:144-152. [PMID: 34933777 DOI: 10.1016/j.humimm.2021.12.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2021] [Revised: 11/16/2021] [Accepted: 12/02/2021] [Indexed: 11/04/2022]
Abstract
The pathophysiological mechanism underlying Graves' disease (GD) remains incompletely understood. Inhibitory receptors on B cells are critical for humoral immunity, which plays a key role in GD pathogenesis. This study aimed to investigate B cell subsets distribution and inhibitory receptor expression on these subsets in GD patients. Peripheral blood was drawn from 41 healthy controls and 46 GD patients (21 patients with moderate GD, 25 patients with severe GD). B cell subset distribution and CD22, CD32b and CD72 expression on B cells were analyzed by flow cytometry. Serum cytokines were examined by enzyme-linked immunosorbent assay (ELISA). Compared with healthy controls, the naïve B cell percentage was increased, while the preswitched memory and conventional memory B cell percentages were decreased. The inhibitory receptors expression, especially CD32b, on B cell subsets was significantly decreased in patients with GD. In addition, the inhibitory receptors expression on B cell subsets from severe GD patients exhibited a decreasing trend compared with those from moderate GD patients. These results suggest that abnormal B cell subset distribution occurs in GD. Impaired inhibitory receptors, in particular CD32b, play a crucial role in GD pathogenesis and might be a therapeutic target to rebuild self-immune tolerance in GD.
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Affiliation(s)
- Yalei Liu
- Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, PR China
| | - Yu Feng
- Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, PR China
| | - Shasha Tang
- Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, PR China
| | - Lijun Zhang
- Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, PR China
| | - Zhoufeng Huang
- Institution of Hematology, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, PR China
| | - Xiaoyang Shi
- Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, PR China
| | - Yuanyuan Fang
- Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, PR China
| | - Junpeng Yang
- Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, PR China
| | - Xinru Deng
- Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, PR China
| | - Limin Wang
- Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, PR China
| | - Xiaozhuan Liu
- Center for Clinical Single-Cell Biomedicine, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, People's Hospital of Henan University, Zhengzhou, Henan 450003, PR China
| | - Huijuan Yuan
- Department of Endocrinology of Henan Provincial People's Hospital, People's Hospital of Zhengzhou University, Zhengzhou, Henan 450003, PR China.
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2
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Young WC, Carpp LN, Chaudhury S, Regules JA, Bergmann-Leitner ES, Ockenhouse C, Wille-Reece U, deCamp AC, Hughes E, Mahoney C, Pallikkuth S, Pahwa S, Dennison SM, Mudrak SV, Alam SM, Seaton KE, Spreng RL, Fallon J, Michell A, Ulloa-Montoya F, Coccia M, Jongert E, Alter G, Tomaras GD, Gottardo R. Comprehensive Data Integration Approach to Assess Immune Responses and Correlates of RTS,S/AS01-Mediated Protection From Malaria Infection in Controlled Human Malaria Infection Trials. Front Big Data 2021; 4:672460. [PMID: 34212134 PMCID: PMC8239149 DOI: 10.3389/fdata.2021.672460] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Accepted: 05/27/2021] [Indexed: 12/13/2022] Open
Abstract
RTS,S/AS01 (GSK) is the world’s first malaria vaccine. However, despite initial efficacy of almost 70% over the first 6 months of follow-up, efficacy waned over time. A deeper understanding of the immune features that contribute to RTS,S/AS01-mediated protection could be beneficial for further vaccine development. In two recent controlled human malaria infection (CHMI) trials of the RTS,S/AS01 vaccine in malaria-naïve adults, MAL068 and MAL071, vaccine efficacy against patent parasitemia ranged from 44% to 87% across studies and arms (each study included a standard RTS,S/AS01 arm with three vaccine doses delivered in four-week-intervals, as well as an alternative arm with a modified version of this regimen). In each trial, RTS,S/AS01 immunogenicity was interrogated using a broad range of immunological assays, assessing cellular and humoral immune parameters as well as gene expression. Here, we used a predictive modeling framework to identify immune biomarkers measured at day-of-challenge that could predict sterile protection against malaria infection. Using cross-validation on MAL068 data (either the standard RTS,S/AS01 arm alone, or across both the standard RTS,S/AS01 arm and the alternative arm), top-performing univariate models identified variables related to Fc effector functions and titer of antibodies that bind to the central repeat region (NANP6) of CSP as the most predictive variables; all NANP6-related variables consistently associated with protection. In cross-study prediction analyses of MAL071 outcomes (the standard RTS,S/AS01 arm), top-performing univariate models again identified variables related to Fc effector functions of NANP6-targeting antibodies as highly predictive. We found little benefit–with this dataset–in terms of improved prediction accuracy in bivariate models vs. univariate models. These findings await validation in children living in malaria-endemic regions, and in vaccinees administered a fourth RTS,S/AS01 dose. Our findings support a “quality as well as quantity” hypothesis for RTS,S/AS01-elicited antibodies against NANP6, implying that malaria vaccine clinical trials should assess both titer and Fc effector functions of anti-NANP6 antibodies.
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Affiliation(s)
- William Chad Young
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States
| | - Lindsay N Carpp
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States
| | - Sidhartha Chaudhury
- Malaria Biologics Branch, Walter Reed Army Institute of Research, Silver Spring, MD, United States
| | - Jason A Regules
- Malaria Biologics Branch, Walter Reed Army Institute of Research, Silver Spring, MD, United States
| | - Elke S Bergmann-Leitner
- Malaria Biologics Branch, Walter Reed Army Institute of Research, Silver Spring, MD, United States
| | | | | | - Allan C deCamp
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States
| | - Ellis Hughes
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States
| | - Celia Mahoney
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States
| | - Suresh Pallikkuth
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL, United States
| | - Savita Pahwa
- Department of Microbiology and Immunology, University of Miami Miller School of Medicine, Miami, FL, United States
| | - S Moses Dennison
- Center for Human Systems Immunology, Duke University, Durham, NC, United States.,Departments of Surgery, Immunology, and Molecular Genetics and Microbiology, Duke University, Durham, NC, United States.,Duke Human Vaccine Institute, Duke University, Durham, NC, United States
| | - Sarah V Mudrak
- Center for Human Systems Immunology, Duke University, Durham, NC, United States.,Departments of Surgery, Immunology, and Molecular Genetics and Microbiology, Duke University, Durham, NC, United States.,Duke Human Vaccine Institute, Duke University, Durham, NC, United States
| | - S Munir Alam
- Center for Human Systems Immunology, Duke University, Durham, NC, United States.,Duke Human Vaccine Institute, Duke University, Durham, NC, United States.,Department of Pathology, Duke University, Durham, NC, United States
| | - Kelly E Seaton
- Center for Human Systems Immunology, Duke University, Durham, NC, United States.,Departments of Surgery, Immunology, and Molecular Genetics and Microbiology, Duke University, Durham, NC, United States.,Duke Human Vaccine Institute, Duke University, Durham, NC, United States
| | - Rachel L Spreng
- Center for Human Systems Immunology, Duke University, Durham, NC, United States.,Departments of Surgery, Immunology, and Molecular Genetics and Microbiology, Duke University, Durham, NC, United States.,Duke Human Vaccine Institute, Duke University, Durham, NC, United States
| | - Jon Fallon
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, United States
| | - Ashlin Michell
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, United States
| | | | | | | | - Galit Alter
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, United States
| | - Georgia D Tomaras
- Center for Human Systems Immunology, Duke University, Durham, NC, United States.,Departments of Surgery, Immunology, and Molecular Genetics and Microbiology, Duke University, Durham, NC, United States.,Duke Human Vaccine Institute, Duke University, Durham, NC, United States
| | - Raphael Gottardo
- Vaccine and Infectious Disease Division, Fred Hutchinson Cancer Research Center, Seattle, WA, United States
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3
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Shen ZY, Zheng Y, Pecsok MK, Wang K, Li W, Gong MJ, Wu F, Zhang L. C-Reactive Protein Suppresses the Th17 Response Indirectly by Attenuating the Antigen Presentation Ability of Monocyte Derived Dendritic Cells in Experimental Autoimmune Encephalomyelitis. Front Immunol 2021; 12:589200. [PMID: 33841391 PMCID: PMC8027258 DOI: 10.3389/fimmu.2021.589200] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2020] [Accepted: 03/01/2021] [Indexed: 12/24/2022] Open
Abstract
Experimental autoimmune encephalomyelitis (EAE) is a classical murine model for Multiple Sclerosis (MS), a human autoimmune disease characterized by Th1 and Th17 responses. Numerous studies have reported that C-reactive protein (CRP) mitigates EAE severity, but studies on the relevant pathologic mechanisms are insufficient. Our previous study found that CRP suppresses Th1 response directly by receptor binding on naïve T cells; however, we did not observe the effect on Th17 response at that time; thus it remains unclear whether CRP could regulate Th17 response. In this study, we verified the downregulation of Th17 response by a single-dose CRP injection in MOG-immunized EAE mice in vivo while the direct and indirect effects of CRP on Th17 response were differentiated by comparing its actions on isolated CD4+ T cells and splenocytes in vitro, respectively. Moreover, the immune cell composition was examined in the blood and CNS (Central Nervous System), and a blood (monocytes) to CNS (dendritic cells) infiltration pathway is established in the course of EAE development. The infiltrated monocyte derived DCs (moDCs) were proved to be the only candidate antigen presenting cells to execute CRP’s function. Conversely, the decrease of Th17 responses caused by CRP disappeared in the above in vivo and in vitro studies with FcγR2B−/− mice, indicating that FcγR2B expressed on moDCs mediates CRP function. Furthermore, peripheral blood monocytes were isolated and induced to establish moDCs, which were used to demonstrate that the antigen presenting ability of moDCs was attenuated by CRP through FcγR2B, and then NF-κB and ERK signaling pathways were manifested to be involved in this regulation. Ultimately, we perfected and enriched the mechanism studies of CRP in EAE remission, so we are more convinced that CRP plays a key role in protecting against EAE development, which may be a potential therapeutic target for the treatment of MS in human.
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Affiliation(s)
- Zhi-Yuan Shen
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Xi'an Jiaotong University, Xi'an, China
| | - Yi Zheng
- School of Medicine, University of Electronic Science and Technology of China, Chengdu, China
| | - Maggie K Pecsok
- Departments of Neurology and Immunology, School of Medicine, Yale University, New Haven, CT, United States
| | - Ke Wang
- MOE Key Laboratory of Cell Activities and Stress Adaptations, School of Life Sciences, Lanzhou University, Lanzhou, China
| | - Wei Li
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Xi'an Jiaotong University, Xi'an, China
| | - Min-Jie Gong
- Department of Otolaryngology Head and Neck Surgery, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, China
| | - Feng Wu
- Center of Teaching and Experiment for Medical Post Graduates, School of Basic Medicine, Xi'an Jiaotong University, Xi'an, China
| | - Lin Zhang
- Department of Biochemistry and Molecular Biology, School of Basic Medicine, Xi'an Jiaotong University, Xi'an, China
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4
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Costa AS, Agostini S, Guerini FR, Mancuso R, Clerici M, Pandey JP. Relation between FCGRIIB rs1050501 and HSV-1 specific IgG antibodies in Alzheimer's disease. J Transl Med 2020; 18:325. [PMID: 32859213 PMCID: PMC7455989 DOI: 10.1186/s12967-020-02495-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 08/20/2020] [Indexed: 01/08/2023] Open
Abstract
Background Alzheimer’s Disease (AD) is a chronic neurodegenerative disorder characterized by extracellular plaques, intracellular neurofibrillary tangles and neuronal loss in the central nervous system (CNS). Pathogens are suspected to have a role in the development of AD; herpes simplex virus type 1 (HSV-1), in particular, is suggested to be a risk factor for the disease. The gamma receptor for the Fc portion of IgG molecules (FCGRs) plays a crucial role in regulating immune responses, and among FCGRs, FCGRIIB is endowed with an inhibitory function. Notably, the rs1050501 polymorphism of FCGRIIB gene associates with autoimmune diseases and with neuronal uptake and interneuronal accumulation of amyloid beta in animal AD models. Methods Genotype and allelic distribution of ApoE4 and FCGRIIB rs1050501 were evaluated in a case–control population of 225 AD patients, 93 MCI individuals and 201 sex and age matched healthy controls (HC). HSV-1 total IgG titers and IgG subclasses were detected and quantified in a subgroup of the main study population by ELISA. Results Genotype and allelic distribution of FCGRIIB was comparable in the study population. HSV-1-specific antibody titers were significantly higher in AD and MCI compared to HC (p < 0.01 for both); IgG3 titers, in particular, were increased in MCI compared to AD (p = 0.04). Analyses of possible correlations between the FCGRIIB rs1050501 genotype polymorphism and IgG subclasses showed that the presence of IgG3 was more frequent in MCI carrying the FCGRIIB TT (94.1%) compared to those carrying the CT genotype (63.6%) (p = 0.03). Conclusion Results herein show an association between humoral immune response against HSV-1 and FCGRIIB rs1050501 genetic variation in the first stage of the disease.
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Affiliation(s)
| | | | | | | | - Mario Clerici
- IRCCS Fondazione Don Carlo Gnocchi, Milan, Italy.,Department of Pathophysiology and Transplantation, University of Milano, Milan, Italy
| | - Janardan P Pandey
- Department of Microbiology and Immunology, Medical University of South Carolina, Charleston, SC, USA
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5
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Wang J, Li Z, Xu L, Yang H, Liu W. Transmembrane domain dependent inhibitory function of FcγRIIB. Protein Cell 2018; 9:1004-1012. [PMID: 29497990 PMCID: PMC6251803 DOI: 10.1007/s13238-018-0509-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Accepted: 12/22/2017] [Indexed: 01/26/2023] Open
Abstract
FcγRIIB, the only inhibitory IgG Fc receptor, functions to suppress the hyper-activation of immune cells. Numerous studies have illustrated its inhibitory function through the ITIM motif in the cytoplasmic tail of FcγRIIB. However, later studies revealed that in addition to the ITIM, the transmembrane (TM) domain of FcγRIIB is also indispensable for its inhibitory function. Indeed, recent epidemiological studies revealed that a non-synonymous single nucleotide polymorphism (rs1050501) within the TM domain of FcγRIIB, responsible for the I232T substitution, is associated with the susceptibility to systemic lupus erythematosus (SLE). In this review, we will summarize these epidemiological and functional studies of FcγRIIB-I232T in the past few years, and will further discuss the mechanisms accounting for the functional loss of FcγRIIB-I232T. Our review will help the reader gain a deeper understanding of the importance of the TM domain in mediating the inhibitory function of FcγRIIB and may provide insights to a new therapeutic target for the associated diseases.
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Affiliation(s)
- Junyi Wang
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Zongyu Li
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Tsinghua University, Beijing, 100084, China
| | - Liling Xu
- Ragon Institute of Massachusetts General Hospital, Massachusetts Institute of Technology, Harvard University, 400 Technology Square, Cambridge, MA, 02139, USA.
| | - Hengwen Yang
- The First Affiliate Hospital, Biomedical Translational Research Institute, Guangdong Province Key Laboratory of Molecular Immunology and Antibody Engineering, Jinan University, Guangzhou, 510632, China.
| | - Wanli Liu
- MOE Key Laboratory of Protein Sciences, Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, School of Life Sciences, Tsinghua University, Beijing, 100084, China.
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6
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Shi Y, Yang CQ, Wang SW, Li W, Li J, Wang SM. Characterization of Fc gamma receptor IIb expression within abdominal aortic aneurysm. Biochem Biophys Res Commun 2017; 485:295-300. [DOI: 10.1016/j.bbrc.2017.02.088] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 02/17/2017] [Indexed: 11/28/2022]
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7
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Liu Y, Gong Y, Qu C, Zhang Y, You R, Yu N, Lu G, Huang Y, Zhang H, Gao Y, Gao Y, Guo X. CD32b expression is down-regulated on double-negative memory B cells in patients with Hashimoto's thyroiditis. Mol Cell Endocrinol 2017; 440:1-7. [PMID: 27832986 DOI: 10.1016/j.mce.2016.11.004] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/22/2016] [Revised: 10/10/2016] [Accepted: 11/05/2016] [Indexed: 01/09/2023]
Abstract
Inhibitory CD32b receptors on B cells are critical for humoral immunity. The humoral response plays a role in the pathogenesis of Hashimoto's thyroiditis (HT). This study aimed to investigate B cell subset distribution and CD32b expression within these subsets in HT patients. B cell subset distribution and CD32b expression were analyzed in 60 HT patients and 21 healthy donors. Subset distribution and CD32b expression following stimulation with α-Ig and α-CD40 were also assessed. The percentage of double-negative (DN) memory cells was increased in the HT patients, while the expression level of CD32b on DN memory cells was decreased. Redistribution of B cell subsets was detected in response to stimulation with α-Ig. In addition, the expression level of CD32b was reduced following α-CD40 stimulation. These results suggest that abnormal B cell subset distribution and decreased CD32b expression on DN memory cells might be involved in the pathogenesis of HT.
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Affiliation(s)
- Yalei Liu
- Department of Endocrinology, Peking University First Hospital, Beijing, 100034, PR China.
| | - Yan Gong
- Department of Clinical Laboratory, Peking University First Hospital, Beijing, 100034, PR China.
| | - Chenxue Qu
- Department of Clinical Laboratory, Peking University First Hospital, Beijing, 100034, PR China.
| | - Yang Zhang
- Department of Endocrinology, Peking University First Hospital, Beijing, 100034, PR China.
| | - Ran You
- Department of Clinical Laboratory, Peking University First Hospital, Beijing, 100034, PR China.
| | - Nan Yu
- Department of Endocrinology, Peking University First Hospital, Beijing, 100034, PR China.
| | - Guizhi Lu
- Department of Endocrinology, Peking University First Hospital, Beijing, 100034, PR China.
| | - Youyuan Huang
- Department of Endocrinology, Peking University First Hospital, Beijing, 100034, PR China.
| | - Hong Zhang
- Department of Endocrinology, Peking University First Hospital, Beijing, 100034, PR China.
| | - Ying Gao
- Department of Endocrinology, Peking University First Hospital, Beijing, 100034, PR China.
| | - Yanming Gao
- Department of Endocrinology, Peking University First Hospital, Beijing, 100034, PR China.
| | - Xiaohui Guo
- Department of Endocrinology, Peking University First Hospital, Beijing, 100034, PR China.
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8
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Hampras SS, Sucheston-Campbell LE, Cannioto R, Chang-Claude J, Modugno F, Dörk T, Hillemanns P, Preus L, Knutson KL, Wallace PK, Hong CC, Friel G, Davis W, Nesline M, Pearce CL, Kelemen LE, Goodman MT, Bandera EV, Terry KL, Schoof N, Eng KH, Clay A, Singh PK, Joseph JM, Aben KK, Anton-Culver H, Antonenkova N, Baker H, Bean Y, Beckmann MW, Bisogna M, Bjorge L, Bogdanova N, Brinton LA, Brooks-Wilson A, Bruinsma F, Butzow R, Campbell IG, Carty K, Cook LS, Cramer DW, Cybulski C, Dansonka-Mieszkowska A, Dennis J, Despierre E, Dicks E, Doherty JA, du Bois A, Dürst M, Easton D, Eccles D, Edwards RP, Ekici AB, Fasching PA, Fridley BL, Gao YT, Gentry-Maharaj A, Giles GG, Glasspool R, Gronwald J, Harrington P, Harter P, Hasmad HN, Hein A, Heitz F, Hildebrandt MA, Hogdall C, Hogdall E, Hosono S, Iversen ES, Jakubowska A, Jensen A, Ji BT, Karlan BY, Kellar M, Kelley JL, Kiemeney LA, Klapdor R, Kolomeyevskaya N, Krakstad C, Kjaer SK, Kruszka B, Kupryjanczyk J, Lambrechts D, Lambrechts S, Le ND, Lee AW, Lele S, Leminen A, Lester J, Levine DA, Liang D, Lissowska J, Liu S, Lu K, Lubinski J, Lundvall L, Massuger LF, Matsuo K, McGuire V, McLaughlin JR, McNeish I, Menon U, Moes-Sosnowska J, Narod SA, Nedergaard L, Nevanlinna H, Nickels S, Olson SH, Orlow I, Weber RP, Paul J, Pejovic T, Pelttari LM, Perkins B, Permuth-Wey J, Pike MC, Plisiecka-Halasa J, Poole EM, Risch HA, Rossing MA, Rothstein JH, Rudolph A, Runnebaum IB, Rzepecka IK, Salvesen HB, Schernhammer E, Schmitt K, Schwaab I, Shu XO, Shvetsov YB, Siddiqui N, Sieh W, Song H, Southey MC, Tangen IL, Teo SH, Thompson PJ, Timorek A, Tsai YY, Tworoger SS, Tyrer J, van Altena AM, Vergote I, Vierkant RA, Walsh C, Wang-Gohrke S, Wentzensen N, Whittemore AS, Wicklund KG, Wilkens LR, Wu AH, Wu X, Woo YL, Yang H, Zheng W, Ziogas A, Gayther SA, Ramus SJ, Sellers TA, Schildkraut JM, Phelan CM, Berchuck A, Chenevix-Trench G, Cunningham JM, Pharoah PP, Ness RB, Odunsi K, Goode EL, Moysich KB. Assessment of variation in immunosuppressive pathway genes reveals TGFBR2 to be associated with risk of clear cell ovarian cancer. Oncotarget 2016; 7:69097-69110. [PMID: 27533245 PMCID: PMC5340115 DOI: 10.18632/oncotarget.10215] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/1969] [Accepted: 12/31/1969] [Indexed: 11/25/2022] Open
Abstract
BACKGROUND Regulatory T (Treg) cells, a subset of CD4+ T lymphocytes, are mediators of immunosuppression in cancer, and, thus, variants in genes encoding Treg cell immune molecules could be associated with ovarian cancer. METHODS In a population of 15,596 epithelial ovarian cancer (EOC) cases and 23,236 controls, we measured genetic associations of 1,351 SNPs in Treg cell pathway genes with odds of ovarian cancer and tested pathway and gene-level associations, overall and by histotype, for the 25 genes, using the admixture likelihood (AML) method. The most significant single SNP associations were tested for correlation with expression levels in 44 ovarian cancer patients. RESULTS The most significant global associations for all genes in the pathway were seen in endometrioid ( p = 0.082) and clear cell ( p = 0.083), with the most significant gene level association seen with TGFBR2 ( p = 0.001) and clear cell EOC. Gene associations with histotypes at p < 0.05 included: IL12 ( p = 0.005 and p = 0.008, serous and high-grade serous, respectively), IL8RA ( p = 0.035, endometrioid and mucinous), LGALS1 ( p = 0.03, mucinous), STAT5B ( p = 0.022, clear cell), TGFBR1 ( p = 0.021 endometrioid) and TGFBR2 ( p = 0.017 and p = 0.025, endometrioid and mucinous, respectively). CONCLUSIONS Common inherited gene variation in Treg cell pathways shows some evidence of germline genetic contribution to odds of EOC that varies by histologic subtype and may be associated with mRNA expression of immune-complex receptor in EOC patients.
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MESH Headings
- Adenocarcinoma, Clear Cell/genetics
- Adenocarcinoma, Clear Cell/immunology
- Adult
- Aged
- Carcinoma, Ovarian Epithelial
- Female
- Gene Expression Regulation, Neoplastic
- Gene Frequency
- Genetic Predisposition to Disease/genetics
- Genotype
- Humans
- Middle Aged
- Neoplasms, Glandular and Epithelial/genetics
- Neoplasms, Glandular and Epithelial/immunology
- Ovarian Neoplasms/genetics
- Ovarian Neoplasms/immunology
- Polymorphism, Single Nucleotide
- Protein Serine-Threonine Kinases/genetics
- Receptor, Transforming Growth Factor-beta Type II
- Receptors, Transforming Growth Factor beta/genetics
- Risk Factors
- T-Lymphocytes, Regulatory/immunology
- T-Lymphocytes, Regulatory/metabolism
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Affiliation(s)
- Shalaka S. Hampras
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, Florida, USA
| | - Lara E. Sucheston-Campbell
- College of Pharmacy, The Ohio State University, Columbus, Ohio, USA
- Department of Veterinary Biosciences, College of Veterinary Medicine, The Ohio State University, Columbus, Ohio, USA
| | - Rikki Cannioto
- Department of Cancer Prevention and Control, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Jenny Chang-Claude
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Heidelberg, Germany
| | - Francesmary Modugno
- Department of Epidemiology and Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
- Women's Cancer Research Program, Magee-Women's Research Institute and University of Pittsburgh Cancer Institute, Pittsburgh, Pennsylvania, USA
| | - Thilo Dörk
- Gynaecology Research Unit, Hannover Medical School, Hannover, Germany
| | - Peter Hillemanns
- Clinics of Obstetrics and Gynaecology, Hannover Medical School, Hannover, Germany
| | - Leah Preus
- Department of Cancer Prevention and Control, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Keith L. Knutson
- Department of Immunology, Mayo Clinic, Rochester, Minnesota, USA
| | - Paul K. Wallace
- Department of Flow & Image Cytometry, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Chi-Chen Hong
- Department of Cancer Prevention and Control, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Grace Friel
- Department of Cancer Prevention and Control, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Warren Davis
- Department of Cancer Prevention and Control, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Mary Nesline
- Center for Personalized Medicine, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Celeste L. Pearce
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California Norris Comprehensive Cancer Center, Los Angeles, California, USA
| | - Linda E. Kelemen
- Alberta Health Services-Cancer Care, Department of Population Health Research, Calgary, Alberta, Canada
| | - Marc T. Goodman
- Cancer Prevention and Control, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Elisa V. Bandera
- Cancer Prevention and Control, Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey, USA
| | - Kathryn L. Terry
- Obstetrics and Gynecology Center, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Nils Schoof
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden
| | - Kevin H. Eng
- Department of Biostatistics & Bioinformatics, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Alyssa Clay
- Department of Cancer Prevention and Control, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Prashant K. Singh
- Department of Cancer Prevention and Control, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Janine M. Joseph
- Department of Cancer Prevention and Control, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Katja K.H. Aben
- Department for Health Evidence, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Hoda Anton-Culver
- Department of Epidemiology and School of Medicine, University of California Irvine, Irvine, California, USA
| | - Natalia Antonenkova
- Byelorussian Institute for Oncology and Medical Radiology Aleksandrov N.N., Minsk, Belarus
| | - Helen Baker
- Department of Oncology, University of Cambridge, Strangeways Research Laboratory, Cambridge, UK
| | - Yukie Bean
- Department of Obstetrics & Gynecology and Knight Cancer Institute, Oregon Health & Science University, Portland, Oregon, USA
| | - Matthias W. Beckmann
- Department of Gynecology and Obstetrics, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Maria Bisogna
- Gynecology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Line Bjorge
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Bergen, Norway
| | - Natalia Bogdanova
- Gynaecology Research Unit, Hannover Medical School, Hannover, Germany
| | - Louise A. Brinton
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland, USA
| | - Angela Brooks-Wilson
- Canada's Michael Smith Genome Sciences Centre, BC Cancer Agency, Vancouver, British Columbia, Canada
| | - Fiona Bruinsma
- Cancer Epidemiology Centre, Cancer Council Victoria, Melbourne, Australia
| | - Ralf Butzow
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
| | - Ian G. Campbell
- Cancer Genetics Laboratory, Research Division, Peter MacCallum Cancer Centre, St Andrews Place, East Melbourne, Australia
| | - Karen Carty
- Cancer Research UK Clinical Trials Unit, The Beatson West of Scotland Cancer Centre, University of Glasgow, Glasgow, UK
| | - Linda S. Cook
- Division of Epidemiology and Biostatistics, Department of Internal Medicine, University of New Mexico, Albuquerque, New Mexico, USA
| | - Daniel W. Cramer
- Obstetrics and Gynecology Center, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Cezary Cybulski
- International Hereditary Cancer Center, Department of Genetics and Pathology, Clinic of Opthalmology, Pomeranian Medical University, Szczecin, Poland
| | - Agnieszka Dansonka-Mieszkowska
- Department of Pathology and Labolatory Diagnostic, The Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland
| | - Joe Dennis
- Department of Oncology, University of Cambridge, Strangeways Research Laboratory, Cambridge, UK
| | - Evelyn Despierre
- Division of Gynecological Oncology, Department of Oncology, University Hospitals Leuven, Belgium
| | - Ed Dicks
- Department of Oncology, University of Cambridge, Strangeways Research Laboratory, Cambridge, UK
| | - Jennifer A. Doherty
- Department of Community and Family Medicine, Section of Biostatistics & Epidemiology, The Geisel School of Medicine at Dartmouth, Hanover, New Hampshire, USA
| | - Andreas du Bois
- Department of Gynecology and Gynecologic Oncology, Kliniken Essen-Mitte/Evang. Huyssens-Stiftung/Knappschaft GmbH, Essen, Germany
| | - Matthias Dürst
- Department of Gynecology, Jena University Hospital - Friedrich Schiller University, Jena, Germany
| | - Doug Easton
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Diana Eccles
- Wessex Clinical Genetics Service, Princess Anne Hospital, Southampton, UK
| | - Robert P. Edwards
- Department of Obstetrics, Gynecology & Reproductive Sciences and Ovarian Cancer Center of Excellence, University of Pittsburgh, Pittsburgh, Pennsylvania, USA
| | - Arif B. Ekici
- Institute of Human Genetics, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Peter A. Fasching
- Department of Medicine, Division of Hematology and Oncology, University of California at Los Angeles, Los Angeles, California, USA
| | - Brooke L. Fridley
- Department of Biostatistics, University of Kansas Medical Center, Kansas City, Kansas, USA
| | | | - Aleksandra Gentry-Maharaj
- Institute for Women's Health, Population Health Sciences, University College - London, London, United Kingdom
| | - Graham G. Giles
- Cancer Epidemiology Centre, Cancer Council Victoria, Melbourne, Australia
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Victoria, Australia
| | - Rosalind Glasspool
- Cancer Research UK Clinical Trials Unit, The Beatson West of Scotland Cancer Centre, University of Glasgow, Glasgow, UK
| | - Jacek Gronwald
- International Hereditary Cancer Center, Department of Genetics and Pathology, Pomeranian Medical University, Szczecin, Poland
| | - Patricia Harrington
- Department of Oncology, University of Cambridge, Strangeways Research Laboratory, Cambridge, UK
| | - Philipp Harter
- Department of Gynecology and Gynecologic Oncology, Kliniken Essen-Mitte/Evang. Huyssens-Stiftung/Knappschaft GmbH, Essen, Germany
| | - Hanis Nazihah Hasmad
- Cancer Research Initiatives Foundation, Sime Darby Medical Center, Subang Jaya, Malaysia
| | - Alexander Hein
- Department of Gynecology and Obstetrics, University Hospital Erlangen, Friedrich-Alexander-University Erlangen-Nuremberg, Erlangen, Germany
| | - Florian Heitz
- Department of Gynecology and Gynecologic Oncology, Kliniken Essen-Mitte/Evang. Huyssens-Stiftung/Knappschaft GmbH, Essen, Germany
| | | | - Claus Hogdall
- Department of Gynaecology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Estrid Hogdall
- Institute of Cancer Epidemiology, Danish Cancer Society, Copenhagen, Denmark
| | - Satoyo Hosono
- Division of Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya, Aichi, Japan
| | - Edwin S. Iversen
- Department of Statistical Science, Duke University, Durham, North Carolina, USA
| | - Anna Jakubowska
- International Hereditary Cancer Center, Department of Genetics and Pathology, Pomeranian Medical University, Szczecin, Poland
| | - Allan Jensen
- Department of Virus, Lifestyle and Genes, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Bu-Tian Ji
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland, USA
| | - Beth Y. Karlan
- Women's Cancer Program at the Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Melissa Kellar
- Department of Obstetrics & Gynecology and Knight Cancer Institute, Oregon Health & Science University, Portland, Oregon, USA
| | - Joseph L. Kelley
- Department of Obstetrics, Gynecology and Reproductive Sciences, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania, USA
| | - Lambertus A. Kiemeney
- Department for Health Evidence, Radboud University Medical Centre, Nijmegen, The Netherlands
| | - Rüdiger Klapdor
- Gynaecology Research Unit, Hannover Medical School, Hannover, Germany
| | - Nonna Kolomeyevskaya
- Division of Gynecologic Oncology, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Camilla Krakstad
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Bergen, Norway
| | - Susanne K. Kjaer
- Department of Gynaecology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
- Department of Virus, Lifestyle and Genes, Danish Cancer Society Research Center, Copenhagen, Denmark
| | - Bridget Kruszka
- Department of Cancer Prevention and Control, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Jolanta Kupryjanczyk
- Department of Pathology and Labolatory Diagnostic, The Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland
| | - Diether Lambrechts
- Vesalius Research Center, VIB, Leuven, Belgium
- Laboratory for Translational Genetics, Department of Oncology, University of Leuven, Belgium
| | - Sandrina Lambrechts
- Division of Gynecological Oncology, Department of Oncology, University Hospitals Leuven, Belgium
| | - Nhu D. Le
- Cancer Control Research, BC Cancer Agency, Vancouver, British Columbia, Canada
| | - Alice W. Lee
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California Norris Comprehensive Cancer Center, Los Angeles, California, USA
| | - Shashikant Lele
- Division of Gynecologic Oncology, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Arto Leminen
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
| | - Jenny Lester
- Women's Cancer Program at the Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Douglas A. Levine
- Gynecology Service, Department of Surgery, Memorial Sloan Kettering Cancer Center, New York, New York, USA
| | - Dong Liang
- College of Pharmacy and Health Sciences, Texas Southern University, Houston, Texas, USA
| | - Jolanta Lissowska
- Department of Cancer Epidemiology and Prevention, M. Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland
| | - Song Liu
- Department of Biostatistics & Bioinformatics, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Karen Lu
- Department of Gynecologic Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Jan Lubinski
- Centre for Epidemiology and Biostatistics, Melbourne School of Population and Global Health, The University of Melbourne, Victoria, Australia
| | - Lene Lundvall
- Department of Gynaecology, Rigshospitalet, University of Copenhagen, Copenhagen, Denmark
| | - Leon F.A.G. Massuger
- Department of Gynaecology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Keitaro Matsuo
- Division of Epidemiology and Prevention, Aichi Cancer Center Research Institute, Nagoya, Aichi, Japan
| | - Valeria McGuire
- Department of Health Research and Policy - Epidemiology, Stanford University School of Medicine, Stanford, California, USA
| | - John R. McLaughlin
- Prosserman Centre for Health Research, Lunenfeld-Tanenbaum Research Institute, Mount Sinai Hospital, Toronto, Ontario, Canada
| | - Ian McNeish
- Institute of Cancer Sciences, University of Glasgow, Glasgow, UK
| | - Usha Menon
- Women's Cancer, UCL EGA Institute for Women's Health, London, UK
| | - Joanna Moes-Sosnowska
- Department of Pathology and Labolatory Diagnostic, The Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland
| | - Steven A. Narod
- Women's College Research Institute, Toronto, Ontario, Canada
| | - Lotte Nedergaard
- Department of Pathology, Rigshospitalet, University of Copenhagen, Denmark
| | - Heli Nevanlinna
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
| | - Stefan Nickels
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Heidelberg, Germany
| | - Sara H. Olson
- Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, New York, USA
| | - Irene Orlow
- Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, New York, USA
| | - Rachel Palmieri Weber
- Department of Community and Family Medicine, Duke University Medical Center, Durham, North Carolina, USA
| | - James Paul
- Cancer Research UK Clinical Trials Unit, The Beatson West of Scotland Cancer Centre, University of Glasgow, Glasgow, UK
| | - Tanja Pejovic
- Department of Oncology, University of Cambridge, Strangeways Research Laboratory, Cambridge, UK
| | - Liisa M. Pelttari
- Department of Obstetrics and Gynecology, University of Helsinki and Helsinki University Central Hospital, Helsinki, Finland
| | - Barbara Perkins
- Department of Oncology, University of Cambridge, Strangeways Research Laboratory, Cambridge, UK
| | - Jenny Permuth-Wey
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, Florida, USA
| | - Malcolm C. Pike
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California Norris Comprehensive Cancer Center, Los Angeles, California, USA
- Department of Epidemiology and Biostatistics, Memorial Sloan-Kettering Cancer Center, New York, New York, USA
| | - Joanna Plisiecka-Halasa
- Department of Pathology and Labolatory Diagnostic, The Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland
| | - Elizabeth M. Poole
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Harvey A. Risch
- Department of Chronic Disease Epidemiology, Yale School of Public Health, New Haven, Connecticut, USA
| | - Mary Anne Rossing
- Program in Epidemiology, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Joseph H. Rothstein
- Department of Health Research and Policy - Epidemiology, Stanford University School of Medicine, Stanford, California, USA
| | - Anja Rudolph
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Heidelberg, Germany
| | - Ingo B. Runnebaum
- Department of Gynecology, Jena University Hospital - Friedrich Schiller University, Jena, Germany
| | - Iwona K. Rzepecka
- Department of Pathology and Labolatory Diagnostic, The Maria Sklodowska-Curie Memorial Cancer Center and Institute of Oncology, Warsaw, Poland
| | - Helga B. Salvesen
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Bergen, Norway
| | - Eva Schernhammer
- Department of Community and Family Medicine, Duke University Medical Center, Durham, North Carolina, USA
| | - Kristina Schmitt
- Department of Cancer Prevention and Control, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Ira Schwaab
- Institut für Humangenetik Wiesbaden, Wiesbaden, Germany
| | - Xiao-Ou Shu
- Vanderbilt Epidemiology Center, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Yurii B Shvetsov
- Cancer Epidemiology Program, University of Hawaii Cancer Center, Hawaii, USA
| | - Nadeem Siddiqui
- Department of Gynaecological Oncology, Glasgow Royal Infirmary, Glasgow, Scotland, UK
| | - Weiva Sieh
- Department of Health Research and Policy - Epidemiology, Stanford University School of Medicine, Stanford, California, USA
| | - Honglin Song
- Department of Oncology, University of Cambridge, Strangeways Research Laboratory, Cambridge, UK
| | - Melissa C. Southey
- Department of Pathology, The University of Melbourne, Melbourne, Australia
| | - Ingvild L. Tangen
- Department of Gynecology and Obstetrics, Haukeland University Hospital, Bergen, Norway
| | - Soo-Hwang Teo
- Cancer Research Initiatives Foundation, Sime Darby Medical Center, Subang Jaya, Malaysia
| | - Pamela J. Thompson
- Cancer Prevention and Control, Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Agnieszka Timorek
- Department of Obstetrics, Gynecology and Oncology, Warsaw Medical University and Brodnowski Hospital, Warsaw, Poland
| | - Ya-Yu Tsai
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, Florida, USA
| | - Shelley S. Tworoger
- Channing Division of Network Medicine, Brigham and Women's Hospital and Harvard Medical School, Boston, Massachusetts, USA
| | - Jonathan Tyrer
- Department of Oncology, University of Cambridge, Strangeways Research Laboratory, Cambridge, UK
| | - Anna M. van Altena
- Department of Gynaecology, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands
| | - Ignace Vergote
- Division of Gynecological Oncology, Department of Oncology, University Hospitals Leuven, Belgium
| | - Robert A. Vierkant
- Department of Health Science Research, Division of Biomedical Statistics and Informatics, Mayo Clinic, Rochester, Minnesota, USA
| | - Christine Walsh
- Women's Cancer Program at the Samuel Oschin Comprehensive Cancer Institute, Cedars-Sinai Medical Center, Los Angeles, California, USA
| | - Shan Wang-Gohrke
- German Cancer Research Center (DKFZ), Division of Cancer Epidemiology, Heidelberg, Germany
| | - Nicolas Wentzensen
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland, USA
| | - Alice S. Whittemore
- Department of Health Research and Policy - Epidemiology, Stanford University School of Medicine, Stanford, California, USA
| | - Kristine G. Wicklund
- Program in Epidemiology, Fred Hutchinson Cancer Research Center, Seattle, Washington, USA
| | - Lynne R. Wilkens
- Cancer Epidemiology Program, University of Hawaii Cancer Center, Hawaii, USA
| | - Anna H. Wu
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California Norris Comprehensive Cancer Center, Los Angeles, California, USA
| | - Xifeng Wu
- Department of Epidemiology, The University of Texas MD Anderson Cancer Center, Houston, Texas, USA
| | - Yin-Ling Woo
- Department of Obstetrics and Gynaecology, Affiliated with UM Cancer Research Institute, Faculty of Medicine, University of Malaya, Malaysia
| | - Hannah Yang
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, Bethesda, Maryland, USA
| | - Wei Zheng
- Vanderbilt Epidemiology Center, Vanderbilt University School of Medicine, Nashville, Tennessee, USA
| | - Argyrios Ziogas
- Department of Epidemiology and School of Medicine, University of California Irvine, Irvine, California, USA
| | - Simon A. Gayther
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California Norris Comprehensive Cancer Center, Los Angeles, California, USA
| | - Susan J. Ramus
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California Norris Comprehensive Cancer Center, Los Angeles, California, USA
| | - Thomas A. Sellers
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, Florida, USA
| | - Joellen M. Schildkraut
- Department of Community and Family Medicine, Duke University Medical Center, Durham, North Carolina, USA
| | - Catherine M. Phelan
- Department of Cancer Epidemiology, Moffitt Cancer Center, Tampa, Florida, USA
| | - Andrew Berchuck
- Department of Obstetrics and Gynecology, Duke University Medical Center, Durham, North Carolina, USA
| | - Georgia Chenevix-Trench
- Cancer Division, QIMR Berghofer Medical Research Institute, Brisbane, Australia
- On behalf of the Australian Ovarian Cancer Study Group
| | - Julie M. Cunningham
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, Minnesota, USA
| | - Paul P. Pharoah
- Centre for Cancer Genetic Epidemiology, Department of Public Health and Primary Care, University of Cambridge, Cambridge, UK
| | - Roberta B. Ness
- School of Public Health, The University of Texas, Houston, Texas, USA
| | - Kunle Odunsi
- Division of Gynecologic Oncology, Roswell Park Cancer Institute, Buffalo, New York, USA
| | - Ellen L. Goode
- Department of Health Science Research, Division of Epidemiology, Mayo Clinic, Rochester, Minnesota, USA
| | - Kirsten B. Moysich
- Department of Cancer Prevention and Control, Roswell Park Cancer Institute, Buffalo, New York, USA
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Soleimanpour S, Hassannia T, Motiee M, Amini AA, Rezaee SAR. Fcγ1 fragment of IgG1 as a powerful affinity tag in recombinant Fc-fusion proteins: immunological, biochemical and therapeutic properties. Crit Rev Biotechnol 2016; 37:371-392. [PMID: 27049690 DOI: 10.3109/07388551.2016.1163323] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Affinity tags are vital tools for the production of high-throughput recombinant proteins. Several affinity tags, such as the hexahistidine tag, maltose-binding protein, streptavidin-binding peptide tag, calmodulin-binding peptide, c-Myc tag, glutathione S-transferase and FLAG tag, have been introduced for recombinant protein production. The fragment crystallizable (Fc) domain of the IgG1 antibody is one of the useful affinity tags that can facilitate detection, purification and localization of proteins and can improve the immunogenicity, modulatory effects, physicochemical and pharmaceutical properties of proteins. Fcγ recombinant forms a group of recombinant proteins called Fc-fusion proteins (FFPs). FFPs are widely used in drug discovery, drug delivery, vaccine design and experimental research on receptor-ligand interactions. These fusion proteins have become successful alternatives to monoclonal antibodies for drug developments. In this review, the physicochemical, biochemical, immunological, pharmaceutical and therapeutic properties of recombinant FFPs were discussed as a new generation of bioengineering strategies.
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Affiliation(s)
- Saman Soleimanpour
- a Microbiology & Virology Research Center, Bu-Ali Research Institute, Mashhad University of Medical Sciences , Mashhad, Iran
| | - Tahereh Hassannia
- b Internal medicine Department, Arash Hospital, the College of Medicine, Tehran University of Medical Sciences , Tehran, Iran
| | - Mahdieh Motiee
- c Inflammation and Inflammatory Diseases Research Center, Medical School, Mashhad University of Medical Sciences , Mashhad, Iran
| | - Abbas Ali Amini
- d Department of Immunology, faculty of medicine, Kurdistan University of Medical Sciences , Sanandaj, Iran
| | - S A R Rezaee
- c Inflammation and Inflammatory Diseases Research Center, Medical School, Mashhad University of Medical Sciences , Mashhad, Iran
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Liu Y, Liu M, Zhang Y, Qu C, Lu G, Huang Y, Zhang H, Yu N, Yuan S, Gao Y, Gao Y, Guo X. The expression of Fcγ receptors in Hashimoto's thyroiditis. Cell Immunol 2015; 294:33-8. [PMID: 25670392 DOI: 10.1016/j.cellimm.2015.01.016] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2014] [Revised: 01/08/2015] [Accepted: 01/28/2015] [Indexed: 10/24/2022]
Abstract
The pathophysiological mechanism underlying Hashimoto's thyroiditis (HT) is still unclear. Thyroglobulin antibody (TgAb) and thyroid peroxidase antibody (TPOAb) are diagnostic hallmarks of HT. These IgG antibodies regulate the balance of immunologic tolerance and autoimmunity via Fcγ receptors (FcγRs). The aim of our study was to investigate the role of FcγRs in the pathogenesis of HT. The percentage of peripheral blood mononuclear cells (PBMCs) from HT patients bearing FcγRII was significantly lower than that seen in healthy donors, and the mean fluorescence intensity (MFI) value of FcγRII on PBMCs from HT patients was significantly higher. The percentage of PBMCs positive for FcγRIII also was significantly higher in HT patients, and the percentage of B cells bearing FcγRIIB in HT patients was significantly lower than that seen in healthy donors. Our study therefore provides evidence for FcγRs, especially FcγRIIB, being involved in the pathogenesis of HT.
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Affiliation(s)
- Yalei Liu
- Department of Endocrinology, Peking University First Hospital, Beijing 100034, PR China.
| | - Mingming Liu
- Institute of Microcirculation, Chinese Academy of Medical Science, Beijing 100005, PR China.
| | - Yang Zhang
- Department of Endocrinology, Peking University First Hospital, Beijing 100034, PR China.
| | - Chenxue Qu
- Department of Clinical Laboratory, Peking University First Hospital, Beijing 100034, PR China.
| | - Guizhi Lu
- Department of Endocrinology, Peking University First Hospital, Beijing 100034, PR China.
| | - Youyuan Huang
- Department of Endocrinology, Peking University First Hospital, Beijing 100034, PR China.
| | - Hong Zhang
- Department of Endocrinology, Peking University First Hospital, Beijing 100034, PR China.
| | - Nan Yu
- Department of Endocrinology, Peking University First Hospital, Beijing 100034, PR China.
| | - Shanshan Yuan
- Department of Endocrinology, Peking University First Hospital, Beijing 100034, PR China.
| | - Ying Gao
- Department of Endocrinology, Peking University First Hospital, Beijing 100034, PR China.
| | - Yanming Gao
- Department of Endocrinology, Peking University First Hospital, Beijing 100034, PR China.
| | - Xiaohui Guo
- Department of Endocrinology, Peking University First Hospital, Beijing 100034, PR China.
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Zhang X, Burch E, Cai L, So E, Hubbard F, Matteson EL, Strome SE. CD40 mediates downregulation of CD32B on specific memory B cell populations in rheumatoid arthritis. THE JOURNAL OF IMMUNOLOGY 2013; 190:6015-22. [PMID: 23686494 DOI: 10.4049/jimmunol.1203366] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
Altered B cell function is important in the pathogenesis of rheumatoid arthritis (RA). In this report, we show that patients with active RA have an increased frequency of CD32B low/neg cells in the CD27(+)IgD(-) memory B cell subset and that these changes are associated with phenotypic and functional B cell activation. Studies using PBMCs from healthy donors revealed that downregulation of CD32B on B cells is mediated by CD40-CD40L interactions and is potentiated by IL-4 and inhibited by both IL-10 and IL-21. These findings appear physiologically relevant because CD4 T cell expression of CD40L correlated with the frequency of CD32B low/neg cells in the CD27(+)IgD(-) memory B subset in patients with RA. Our data support a model in which high levels of CD40L, present on circulating T cells in patients with RA, causes B cell activation and CD32B downregulation, resulting in secondary protection of memory B cells from CD32B-mediated cell death.
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Affiliation(s)
- Xiaoyu Zhang
- Department of Otorhinolaryngology-Head and Neck Surgery, University of Maryland, Baltimore, MD 21201, USA
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12
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Hernández T, de Acosta CM, López-Requena A, Moreno E, Alonso R, Fernández-Marrero Y, Pérez R. Non-classical binding of a polyreactive α-type anti-idiotypic antibody to B cells. Mol Immunol 2010; 48:98-108. [PMID: 20952071 DOI: 10.1016/j.molimm.2010.09.006] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2010] [Revised: 09/10/2010] [Accepted: 09/14/2010] [Indexed: 10/18/2022]
Abstract
Detailed information on the immunological relevance of α-type anti-idiotypic antibodies is lacking after more than 30 years since Jerne postulated his Idiotypic Network Theory. The B7Y33 mutant is a mouse-human chimeric version of the B7 MAb, a polyreactive α-type anti-idiotypic antibody, generated against an anti-GM2 ganglioside IgM Ab1 antibody. It retained the unusual self-binding activity and multispecificity of the parental murine antibody, being able to recognize several anti-ganglioside IgM antibodies as well as non-immunoglobulin antigens. Previous work with the murine B7 MAb suggested that this antibody might have immunoregulatory properties, and therefore we investigated the possible interaction of B7Y33 with immune cells. We found that B7Y33 binds to human and murine B lymphocytes. Inhibition assays using flow cytometry indicated that this antibody is capable of binding the Fc γ receptor II (FcγRII). The recognition of FcγRII-expressing K562, Raji and Daudi human cell lines, together with the capability of inhibiting the binding of an anti-human FcγRII antibody to these cells, suggest that B7Y33 interacts with both the FcγRIIa and FcγRIIb isoforms. We evaluated the contribution to the binding of different surface-exposed residues at the top of the heavy chain variable region (VH) CDR loops through the construction of mutants with substitutions in the three conventional VH CDRs (HCDRs) and the "HCDR4", located in the framework 3 (HFR3). In addition, we assessed the involvement of the Fc region by performing key mutations in the CH2 domain. Furthermore, chimeric hybrid molecules were obtained by combining the B7Y33 heavy chain with unrelated light chains. Our results indicate that the multispecificity and self-binding properties of B7Y33 are not linked to its recognition of B lineage cells, and that this phenomenon occurs in a non-classical way with the participation of both the variable and constant regions of the antibody. Two possible models for this interaction are proposed, with B7Y33 binding to two FcγRIIb molecules through the Fc and Fv regions, or simultaneously to FcγRIIb and another unknown antigen on B cells. The FcγRIIb has recently received great attention as an attractive target for therapies directed to B lymphocytes. The recognition of peripheral B lymphocytes from B cell chronic lymphocytic leukemia (B-CLL) patients by B7Y33 suggests its potential application for the treatment of B cell malignancies.
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Affiliation(s)
- Tays Hernández
- Immunobiology Division, Center of Molecular Immunology, P.O. Box 16040, Havana 11600, Cuba
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Smith KGC, Clatworthy MR. FcgammaRIIB in autoimmunity and infection: evolutionary and therapeutic implications. Nat Rev Immunol 2010; 10:328-43. [PMID: 20414206 PMCID: PMC4148599 DOI: 10.1038/nri2762] [Citation(s) in RCA: 383] [Impact Index Per Article: 27.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
FcgammaRIIB is the only inhibitory Fc receptor. It controls many aspects of immune and inflammatory responses, and variation in the gene encoding this protein has long been associated with susceptibility to autoimmune disease, particularly systemic lupus erythematosus (SLE). FcgammaRIIB is also involved in the complex regulation of defence against infection. A loss-of-function polymorphism in FcgammaRIIB protects against severe malaria, the investigation of which is beginning to clarify the evolutionary pressures that drive ethnic variation in autoimmunity. Our increased understanding of the function of FcgammaRIIB also has potentially far-reaching therapeutic implications, being involved in the mechanism of action of intravenous immunoglobulin, controlling the efficacy of monoclonal antibody therapy and providing a direct therapeutic target.
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Affiliation(s)
- Kenneth G C Smith
- Cambridge Institute for Medical Research and the Department of Medicine, University of Cambridge School of Clinical Medicine, Cambridge CB2 0XY, UK.
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14
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Multiple bovine FcγRIIb sub-isoforms generated by alternative splicing. Vet Immunol Immunopathol 2010; 135:43-51. [DOI: 10.1016/j.vetimm.2009.10.029] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Revised: 10/21/2009] [Accepted: 10/22/2009] [Indexed: 11/22/2022]
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15
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Hostmann A, Jacobi AM, Mei H, Hiepe F, Dörner T. Peripheral B cell abnormalities and disease activity in systemic lupus erythematosus. Lupus 2009; 17:1064-9. [PMID: 19029273 DOI: 10.1177/0961203308095138] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Autoreactive B cells and plasma cells appear to be of central importance in the pathogenesis of systemic lupus erythematosus (SLE) characterized by a plethora of autoantibodies. Recent insights into abnormalities of B cell and plasma cell compartments in human SLE have identified a number of cellular disturbances within these compartments that in part correlate with the disease activity. This review discusses these findings and the potential underlying extrinsic and/or intrinsic influences apparently driving general B cell activation in this entity.
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Affiliation(s)
- A Hostmann
- Charite, University Hospital Berlin, Berlin, Germany
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16
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Nakatani K, Qu WM, Zhang MC, Fujii H, Furukawa H, Miyazaki T, Iwano M, Saito Y, Nose M, Ono M. A genetic locus controlling aging-sensitive regression of B lymphopoiesis in an autoimmune-prone MRL/lpr strain of mice. Scand J Immunol 2007; 66:654-61. [PMID: 17983422 DOI: 10.1111/j.1365-3083.2007.02020.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Aging readily affects immune system under the influence of environmental and/or intrinsic factors while accelerating the development of various immune disorders including autoimmune diseases. Little is known about molecular and cellular mechanisms connecting between immune senescence and development of autoimmune diseases. Here, we first show strain-specific and aging-sensitive onset of B-cell abnormality in a lupus-prone MRL/Mp.Fas(lpr) (MRL/lpr) strain of mice. This abnormality was characterized by the regression of B lymphopoiesis in the bone marrow of this strain. We next examined the association between the B-cell regression and onset of autoimmune diseases in aged (MRL/lpr x C3H/He.Fas(lpr)) F2 mice, in which pathologic phenotypes, such as glomerulonephritis, vasculitis, sialoadenitis and arthritis, variously developed. We also searched whole genome to identify genetic loci linked to the B-cell regression by using the same F2 mice. The B-cell regression manifested in the spleen of F2 mice was retrospectively evaluated by reverse transcriptase-based PCR quantification. The results demonstrated that the onset of autoimmune diseases in the F2 mice was not associated with the aging-sensitive B-cell regression. The genetic study identified a significant locus responsible for the B-cell regression in the vicinity of D5Mit233 (29 cM). This is first evidence for the presence of a genetic locus that affects B lymphopoiesis in an aging-sensitive manner.
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Affiliation(s)
- K Nakatani
- First Department of Internal Medicine, Nara Medical University, Kashihara, Japan
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17
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Vachon E, Martin R, Kwok V, Cherepanov V, Chow CW, Doerschuk CM, Plumb J, Grinstein S, Downey GP. CD44-mediated phagocytosis induces inside-out activation of complement receptor-3 in murine macrophages. Blood 2007; 110:4492-502. [PMID: 17827392 PMCID: PMC2234794 DOI: 10.1182/blood-2007-02-076539] [Citation(s) in RCA: 50] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Diverse receptors, including Fcgamma receptors and beta(2) integrins (complement receptor-3 [CR3], CD11b/CD18), have been implicated in phagocytosis, but their distinct roles and interactions with other receptors in particle engulfment are not well defined. CD44, a transmembrane adhesion molecule involved in binding and metabolism of hyaluronan, may have additional functions in regulation of inflammation and phagocytosis. We have recently reported that CD44 is a fully competent phagocytic receptor that is able to trigger ingestion of large particles by macrophages. Here, we investigated the role of coreceptors and intracellular signaling pathways in modulation of CD44-mediated phagocytosis. Using biotinylated erythrocytes coated with specific antibodies (anti-CD44-coated erythrocytes [Ebabs]) as the phagocytic prey, we determined that CD44-mediated phagocytosis is reduced by 45% by a blocking CD11b antibody. Further, CD44-mediated phagocytosis was substantially (42%) reduced in CD18-null mice. Immunofluorescence microscopy revealed that CD11b is recruited to the phagocytic cup. The mechanism of integrin activation and mobilization involved activation of the GTPase Rap1. CD44-mediated phagocytosis was also sensitive to the extracellular concentration of the divalent cation Mg(2+) but not Ca(2+). In addition, buffering of intracellular Ca(2+) did not affect CD44-mediated phagocytosis. Taken together, these data suggest that CD44 stimulation induces inside-out activation of CR3 through the GTPase Rap1.
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Affiliation(s)
- Eric Vachon
- Division of Respirology, Department of Medicine, University of Toronto, Toronto, ON, Canada
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18
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Rahman ZSM, Alabyev B, Manser T. FcgammaRIIB regulates autoreactive primary antibody-forming cell, but not germinal center B cell, activity. THE JOURNAL OF IMMUNOLOGY 2007; 178:897-907. [PMID: 17202351 DOI: 10.4049/jimmunol.178.2.897] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The low-affinity FcR for IgG FcgammaRIIB suppresses the development of IgG autoantibodies and autoimmune disease in normal individuals, but how this effect is mediated is incompletely understood. To investigate this issue, we created FcgammaRIIB-deficient versions of two previously described targeted BCR-transgenic lines of mice that contain follicular B cells with specificity for the hapten arsonate, but with different levels of antinuclear autoantigen reactivity. The primary development and tolerance of both types of B cells were unaltered by the absence of FcgammaRIIB. Moreover, the reduced p-azophenylarsonate-driven germinal center and memory responses characteristic of the highly autoreactive clonotype were not reversed by an intrinsic FcgammaRIIB deficiency. In contrast, the p-azophenylarsonate-driven primary Ab-forming cell responses of both clonotypes were equivalently increased by such a deficiency. In total, our data do not support the idea that FcgammaRIIB directly participates in the action of primary or germinal center tolerance checkpoints. In contrast, this receptor apparently contributes to the prevention of autoimmunity by suppressing the production of autoreactive IgGs from B cells that have breached tolerance checkpoints and entered the Ab-forming cell pathway due to spontaneous, or cross-reactive, Ag-mediated activation.
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Affiliation(s)
- Ziaur S M Rahman
- Department of Microbiology and Immunology and Kimmel Cancer Center, Thomas Jefferson Medical College, 233 South 10th Street, Philadelphia, PA 19107, USA.
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19
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Rahman ZSM, Manser T. Failed up-regulation of the inhibitory IgG Fc receptor Fc gamma RIIB on germinal center B cells in autoimmune-prone mice is not associated with deletion polymorphisms in the promoter region of the Fc gamma RIIB gene. THE JOURNAL OF IMMUNOLOGY 2005; 175:1440-9. [PMID: 16034080 DOI: 10.4049/jimmunol.175.3.1440] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
FcgammaRIIB, a low-affinity FcR for IgG, inhibits BCR-mediated activation when these two receptors are co-cross-linked by Ags and IgG-containing immune complexes. Although a role for FcgammaRIIB in the germinal center (GC) reaction has been proposed, conflicting results have been published regarding the levels of FcgammaRIIB expressed on GC B cells in normal and autoimmune-prone mice and humans. In the present study, we investigate this issue in detail in mice by using multiple GC B cell markers, two different antigenic systems, primary and secondary GC responses, and by excluding the influence of splenic influx of immature B cells and passive acquisition of FcgammaRIIB from follicular dendritic cells. Our results are in concordance with previous data indicating that FcgammaRIIB expression is up-regulated on GC B cells in normal mice. In contrast, we observe comparable levels of FcgammaRIIB on GC and non-GC B cells in New Zealand White, New Zealand Black, and B6.Sle1 autoimmune-prone strains. Therefore, we suggest that these strains exhibit failed up-regulation of FcgammaRIIB on GC B cells, rather than down-regulation, as previously suggested. Also, in contrast to previous indications, this perturbed regulation is not uniquely associated with deletion polymorphisms in the promoter region of the FcgammaRIIB gene but does appear to be independent of genetic background. Finally, we present evidence indicating that FcgammaRIII, a low-affinity activating IgG FcR, is expressed on the GC B cells of normal but not autoimmune-prone mice.
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MESH Headings
- Animals
- Antigens, CD/biosynthesis
- Antigens, CD/genetics
- B-Lymphocytes/immunology
- B-Lymphocytes/metabolism
- Base Sequence
- Dendritic Cells, Follicular/immunology
- Dendritic Cells, Follicular/metabolism
- Down-Regulation/genetics
- Down-Regulation/immunology
- Gene Deletion
- Genetic Predisposition to Disease
- Germinal Center/cytology
- Germinal Center/immunology
- Germinal Center/metabolism
- Lupus Erythematosus, Systemic/genetics
- Lupus Erythematosus, Systemic/immunology
- Mice
- Mice, Congenic
- Mice, Inbred BALB C
- Mice, Inbred C57BL
- Mice, Inbred NZB
- Mice, Knockout
- Molecular Sequence Data
- Polymorphism, Genetic/immunology
- Promoter Regions, Genetic/immunology
- RNA/biosynthesis
- Receptors, IgG/biosynthesis
- Receptors, IgG/deficiency
- Receptors, IgG/genetics
- Stromal Cells/immunology
- Stromal Cells/metabolism
- Up-Regulation/genetics
- Up-Regulation/immunology
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Affiliation(s)
- Ziaur S M Rahman
- Department of Microbiology and Immunology and Kimmel Cancer Center, Jefferson Medical College, Philadelphia, PA 19107-5541, USA
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20
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Herber DL, Roth LM, Wilson D, Wilson N, Mason JE, Morgan D, Gordon MN. Time-dependent reduction in Abeta levels after intracranial LPS administration in APP transgenic mice. Exp Neurol 2005; 190:245-53. [PMID: 15473997 DOI: 10.1016/j.expneurol.2004.07.007] [Citation(s) in RCA: 127] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2004] [Revised: 06/23/2004] [Accepted: 07/21/2004] [Indexed: 10/26/2022]
Abstract
Inflammation has been argued to play a primary role in the pathogenesis of Alzheimer's disease (AD). Lipopolysaccharide (LPS) activates the innate immune system, triggering gliosis and inflammation when injected in the central nervous system. In studies described here, APP transgenic mice were injected intrahippocampally with 4 or 10 microg of LPS and evaluated 1, 3, 7, 14, or 28 days later. Abeta load was significantly reduced at 3, 7, and 14 days but surprisingly returned near baseline 28 days after the injection. No effects of LPS on congophilic amyloid deposits could be detected. LPS also activated both microglia and astrocytes in a time-dependent manner. The GFAP astrocyte reaction and the Fcgamma receptor microglial reaction peaked at 7 days after LPS injection, returning to baseline by 2 weeks postinjection. When stained for CD45, microglial activation was detected at all time points, although the morphology of these cells transitioned from an ameboid to a ramified and bushy appearance between 7 and 14 days postinjection. These results indicate that activation of brain glia can rapidly and transiently clear diffuse Abeta deposits but has no effect on compacted fibrillar amyloid.
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Affiliation(s)
- Donna L Herber
- Alzheimer Research Laboratory, Department of Pharmacology and Therapeutics, University of South Florida, Tampa, FL 33612-4799, USA
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21
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Macardle PJ, Mardell C, Bailey S, Wheatland L, Ho A, Jessup C, Roberton DM, Zola H. FcgammaRIIb expression on human germinal center B lymphocytes. Eur J Immunol 2002; 32:3736-44. [PMID: 12516568 DOI: 10.1002/1521-4141(200212)32:12<3736::aid-immu3736>3.0.co;2-i] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
IgG antibody can specifically suppress the antibody response to antigen. This has been explained by the hypothesis that signaling through the B cell antigen receptor is negatively modulated by the co-ligation of immunoglobulin with the receptor for IgG, FcgammaRIIb. We hypothesized that inhibitory signaling through FcgammaRIIb would be counter-productive in germinal center cells undergoing selection by affinity maturation, since these cells are thought to receive a survival/proliferative signal by interacting with antigen displayed on follicular dendritic cells. We have identified and characterized a population of B lymphocytes with low/negative FcgammaRIIb expression that are present in human tonsil. Phenotypically these cells correspond to germinal center B cells and comprise both centroblast and centrocyte populations. In examining expression at the molecular level we determined that these B cells do not express detectable mRNA for FcgammaRIIb. We examined several culture conditions to induce expression of FcgammaRIIb on germinal center cells but could not determine conditions that altered expression. We then examined the functional consequence of cross-linking membrane immunoglobulin and the receptor for IgG on human B lymphocytes. Our results cast some doubt on the value of anti-IgG as a model for antigen-antibody complexes in studying human B cell regulation.
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Affiliation(s)
- Peter J Macardle
- Department of Immunology, Allergy and Arthritis, Flinders Medical Centre and Flinders University of South Australia, Bedford Park, South Australia, Australia.
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22
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Malbec O, Attal JP, Fridman WH, Daëron M. Negative regulation of mast cell proliferation by FcgammaRIIB. Mol Immunol 2002; 38:1295-9. [PMID: 12217398 DOI: 10.1016/s0161-5890(02)00078-0] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
FcgammaRIIB are single-chain low-affinity receptors for the Fc portion of IgG antibodies that are widely expressed by hematopoietic cells including mast cells. We previously demonstrated that FcgammaRIIB negatively regulate cell activation triggered by receptors that possess Immunoreceptor Tyrosine-based Activation Motifs (ITAMs) including high-affinity IgE receptors (FcepsilonRI). FcgammaRIIB possess an Immunoreceptor Tyrosine-based Inhibition Motif (ITAM) whose deletion or mutation abolishes inhibition. When coaggregated with FcepsilonRI, the FcgammaRIIB ITIM is tyrosyl-phosphorylated by the src family protein tyrosine kinase lyn, and recruits the SH2 domain-containing inositol 5-phosphatase SHIP that accounts for inhibition of cell activation. We found recently that, when coaggregated with Kit, FcgammaRIIB can also inhibit mast cell proliferation: thymidine incorporation is inhibited, cells do not enter the G1 phase of the cell cycle, the induction of cyclins D2, D3 and A is inhibited, the activation of the MAP kinases Erk1/2, JNK and p38 is decreased, Akt phosphorylation is inhibited, and SHIP coprecipitates with FcgammaRIIB. Although inhibition of Akt phosphorylation and Erk activation was abrogated in SHIP(-/-) cells, inhibition of thymidine incorporation was only partially reduced. FcgammaRIIB-dependent inhibition of Kit-mediated mast cell proliferation was however mimicked by FcgammaRIIB whose intracytoplasmic domain was replaced by the catalytic domain of SHIP. We also found that FcgammaRIIB can inhibit the proliferation of cells whose proliferation was rendered growth factor-independent because they express a mutated form of Kit that renders this RTK constitutively activated. Based on these results we developed models aiming at using FcgammaRIIB as targets for new therapeutic approaches of disease associated with mast cell activation such as allergies and diseases associated with mast cell proliferation such as mastocytosis, mastocytomas or mast cell leukemias.
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Affiliation(s)
- Odile Malbec
- Laboratoire d'Immunologie Cellulaire et Clinique, INSERM U.255, Institut Biomédical des Cordeliers, 15 rue de l'Ecole de Médecine, 75006, Paris, France
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23
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Davis RS, Dennis G, Kubagawa H, Cooper MD. Fc receptor homologs (FcRH1-5) extend the Fc receptor family. Curr Top Microbiol Immunol 2002; 266:85-112. [PMID: 12014205 DOI: 10.1007/978-3-662-04700-2_7] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Affiliation(s)
- R S Davis
- Division of Hematology/Oncology, Department of Medicine, University of Alabama at Birmingham, AL 35294-3300, USA
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24
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Karlsson MC, Getahun A, Heyman B. FcgammaRIIB in IgG-mediated suppression of antibody responses: different impact in vivo and in vitro. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2001; 167:5558-64. [PMID: 11698426 DOI: 10.4049/jimmunol.167.10.5558] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The suppressive effect of IgG on Ab responses to particulate Ags such as erythrocytes is well documented. IgG-mediated suppression is used clinically in rhesus prophylaxis to prevent RhD-negative mothers from becoming immunized against their Rh D-positive fetuses. We have recently shown that IgG anti-SRBC, passively administered together with SRBC, can induce efficient suppression of primary Ab responses to SRBC in mice lacking the known FcRs for IgG (FcgammaRI, FcgammaIII, and FcgammaRIIB or the neonatal FcR). The lack of a demonstrable effect of the inhibitory FcgammaRIIB was particularly surprising, and, in this study, the involvement of this receptor is further investigated during broader experimental conditions. The data show that SRBC-specific IgG administered up to 5 days after SRBC can induce suppression both in wild-type and FcgammaRIIB-deficient mice. Suppression of secondary Ab responses to SRBC in vivo was similar in the two strains. In contrast, IgG-mediated suppression of Ab responses in vitro was impaired in cultures with primed FcgammaRIIB-deficient spleen cells. In conclusion, inhibition of in vivo Ab responses to SRBC by passively administered IgG can take place via an FcgammaRIIB-independent pathway. This pathway causes >99% suppression and operates during all experimental conditions studied so far. The nature of the mechanism can at present only be hypothesized. Masking of epitopes and/or rapid elimination of IgG-Ag complexes would both be compatible with the observations.
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Affiliation(s)
- M C Karlsson
- Department of Genetics and Pathology, Uppsala University, Uppsala, Sweden
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25
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Malbec O, Schmitt C, Bruhns P, Krystal G, Fridman WH, Daëron M. Src Homology 2 Domain-containing Inositol 5-Phosphatase 1 Mediates Cell Cycle Arrest by FcγRIIB. J Biol Chem 2001; 276:30381-91. [PMID: 11359765 DOI: 10.1074/jbc.m011094200] [Citation(s) in RCA: 21] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
We previously found that low affinity receptors for the Fc portion of IgG, FcgammaRIIB, which are widely expressed by hematopoietic cells, can negatively regulate receptor tyrosine kinase-dependent cell proliferation. We investigated here the mechanisms of this inhibition. We used as experimental models wild-type mast cells, which constitutively express the stem cell factor receptor Kit and FcgammaRIIB, FcgammaRIIB-deficient mast cells reconstituted with wild-type or mutated FcgammaRIIB, and Src homology 2 domain-containing inositol polyphosphate 5-phosphatase 1 (SHIP1)-deficient mast cells. We found that, upon coaggregation with Kit, FcgammaRIIB are tyrosyl-phosphorylated, recruit SHIP1, but not SHIP2, SH2 domain-containing protein tyrosine phosphatase-1 or -2, abrogate Akt phosphorylation, shorten the duration of the activation of mitogen-activated protein kinases of the Ras and Rac pathways, abrogate cyclin induction, prevent cells from entering the cell cycle, and block thymidine incorporation. FcgammaRIIB-mediated inhibition of Kit-dependent cell proliferation was reduced in SHIP1-deficient mast cells, whereas inhibition of IgE-induced responses was abrogated. Cell proliferation was, however, inhibited by coaggregating Kit with FcgammaRIIB whose intracytoplasmic domain was replaced with the catalytic domain of SHIP1. These results demonstrate that FcgammaRIIB use SHIP1 to inhibit pathways shared by receptor tyrosine kinases and immunoreceptors to trigger cell proliferation and cell activation, respectively, but that, in the absence of SHIP1, FcgammaRIIB can use other effectors that specifically inhibit cell proliferation.
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MESH Headings
- Animals
- Antigens, CD/chemistry
- Antigens, CD/metabolism
- Blotting, Western
- Bone Marrow Cells/metabolism
- Catalytic Domain
- Cell Cycle
- Cell Division
- Cell Survival
- DNA, Complementary/metabolism
- Dimerization
- Dose-Response Relationship, Drug
- Gene Deletion
- Gene Transfer Techniques
- MAP Kinase Signaling System
- Mice
- Phosphatidylinositol-3,4,5-Trisphosphate 5-Phosphatases
- Phosphoric Monoester Hydrolases/chemistry
- Phosphoric Monoester Hydrolases/metabolism
- Phosphorylation
- Precipitin Tests
- Protein Binding
- Protein Structure, Tertiary
- Proto-Oncogene Proteins c-kit/metabolism
- Rats
- Receptors, IgG/chemistry
- Receptors, IgG/metabolism
- Retroviridae/genetics
- Signal Transduction
- Stem Cell Factor/metabolism
- Thymidine/metabolism
- Time Factors
- Tumor Necrosis Factor-alpha/metabolism
- Tyrosine/metabolism
- src Homology Domains
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Affiliation(s)
- O Malbec
- Laboratoire d'Immunologie Cellulaire et Clinique, INSERM U.255, Institut Curie, 75005 Paris, France
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26
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Brauweiler A, Tamir I, Marschner S, Helgason CD, Cambier JC. Partially distinct molecular mechanisms mediate inhibitory FcgammaRIIB signaling in resting and activated B cells. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2001; 167:204-11. [PMID: 11418650 DOI: 10.4049/jimmunol.167.1.204] [Citation(s) in RCA: 44] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
FcgammaRIIB functions as an inhibitory receptor to dampen B cell Ag receptor signals and immune responses. Accumulating evidence indicates that ex vivo B cells require the inositol 5-phosphatase, Src homology domain 2-containing inositol 5-phosphatase (SHIP), for FcgammaRIIB-mediated inhibitory signaling. However, we report here that LPS-activated primary B cells do not require SHIP and thus differ from resting B cells. SHIP-deficient B cell blasts display efficient FcgammaRIIB-dependent inhibition of calcium mobilization as well as Akt and extracellular signal-related protein kinase phosphorylation. Surprisingly, FcgammaRIIB-dependent degradation of phosphatidylinositol 3,4,5-trisphosphate and conversion into phosphatidylinositol 3,4-bisphosphate occur in SHIP-deficient B cell blasts, demonstrating the function of an additional inositol 5-phosphatase. Further analysis reveals that while resting cells express only SHIP, B cell blasts also express the recently described inositol 5-phosphatase, SHIP-2. Finally, data suggest that both SHIP-2 and SHIP can mediate downstream biologic consequences of FcgammaRIIB signaling, including inhibition of the proliferative response.
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Affiliation(s)
- A Brauweiler
- Department of Immunology, National Jewish Medical and Research Center, Denver, CO 80206, USA
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27
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Abstract
Antibodies can completely suppress or enhance the antibody response to their specific antigen by several hundredfold. Immunoglobulin M (IgM) enhances antibody responses via the complement system, and complement activation by IgM probably starts the chain of events leading to antibody responses to suboptimal antigen doses. IgG can enhance primary antibody responses in the absence of the complement system and seems to be dependent on Fc receptors for IgG (FcgammaRs). IgE enhances antibody responses via the low-affinity receptor for IgE (FcepsilonRII/CD23). The precise effector mechanisms that cause enhancement are not known, but direct B-cell signaling, antigen presentation, and increased follicular localization are all possibilities. IgG, IgE, and IgM may also suppress antibody responses when used in certain immunization regimes, and it seems reasonable that an important mechanism behind suppression is the masking of antigenic epitopes by antibodies. In addition, FcgammaRIIB, which contains a cytoplasmic inhibitory motif, acts as a negative regulator of antibody responses. This receptor, however, may prevent the antibody responses from exceeding a certain level rather than causing complete suppression.
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Affiliation(s)
- B Heyman
- Department of Genetics and Pathology, Uppsala University, Sweden.
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28
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Daëron M, Vivier E. Biology of immunoreceptor tyrosine-based inhibition motif-bearing molecules. Curr Top Microbiol Immunol 1999; 244:1-12. [PMID: 10453645 DOI: 10.1007/978-3-642-58537-1_1] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- M Daëron
- Laboratoire d'Immunologie Cellulaire et Clinique, INSERM U.255, Institut Curie, Paris, France
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29
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Malbec O, Fridman WH, Daëron M. Negative Regulation of Hematopoietic Cell Activation and Proliferation by FcγRIIB. Curr Top Microbiol Immunol 1999. [DOI: 10.1007/978-3-642-58537-1_2] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
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30
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Malbec O, Fong DC, Turner M, Tybulewicz VLJ, Cambier JC, Fridman WH, Daëron M. Fcε Receptor I-Associated lyn-Dependent Phosphorylation of Fcγ Receptor IIB During Negative Regulation of Mast Cell Activation. THE JOURNAL OF IMMUNOLOGY 1998. [DOI: 10.4049/jimmunol.160.4.1647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Abstract
FcγRIIB are low-affinity receptors for IgG whose intracytoplasmic domain contains an immunoreceptor tyrosine-based inhibition motif (ITIM). FcγRIIB inhibit cell activation triggered by receptors that signal via immunoreceptor tyrosine-based activation motifs. This inhibition requires ITIM tyrosyl phosphorylation and is correlated with the binding of SH2 domain-containing phosphatases that may mediate the inhibitory signal. In the present work, we investigated the mechanism of FcγRIIB phosphorylation and its consequences in mast cells. We demonstrate that the phosphorylation of FcγRIIB requires coaggregation with FcεRI and that, once phosphorylated, FcγRIIB selectively recruit the inositol polyphosphate 5 phosphatase SHIP, in vivo. In vitro, however, the phosphorylated FcγRIIB ITIM binds not only SHIP, but also the two protein tyrosine phosphatases, SHP-1 and SHP-2. We show that the coaggregation of FcγRIIB with FcεRI does not prevent FcεRI-mediated activation of lyn and syk. Both kinases can phosphorylate FcγRIIB in vitro. However, when coaggregated with FcεRI, FcγRIIB was in vivo phosphorylated in syk-deficient mast cells, but not in lyn-deficient mast cells. When FcεRI are coaggregated with FcγRIIB by immune complexes, FcεRI-associated lyn may thus phosphorylate FcγRIIB. By this mechanism, FcεRI initiate ITIM-dependent inhibition of intracellular propagation of their own signals.
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Affiliation(s)
- Odile Malbec
- *Laboratoire d’Immunologie Cellulaire et Clinique, INSERM U.255, Institut Curie, Paris, France
| | - Dana C. Fong
- †Department of Pediatrics, National Jewish Center for Immunology and Respiratory Medicine, Denver, CO 80206; and
| | - Martin Turner
- ‡Division of Cellular Immunology, National Institute for Medical Research, London, United Kingdom
| | - Victor L. J. Tybulewicz
- ‡Division of Cellular Immunology, National Institute for Medical Research, London, United Kingdom
| | - John C. Cambier
- †Department of Pediatrics, National Jewish Center for Immunology and Respiratory Medicine, Denver, CO 80206; and
| | - Wolf H. Fridman
- *Laboratoire d’Immunologie Cellulaire et Clinique, INSERM U.255, Institut Curie, Paris, France
| | - Marc Daëron
- *Laboratoire d’Immunologie Cellulaire et Clinique, INSERM U.255, Institut Curie, Paris, France
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Role of Immunoreceptor Tyrosine-Based Activation Motif in Signal Transduction from Antigen and Fc Receptors**Received for publication October 7, 1997. Adv Immunol 1998. [DOI: 10.1016/s0065-2776(08)60608-2] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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32
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Affiliation(s)
- E Vivier
- Centre d'Immunologie INSERM/CNRS de Marseille-Luminy, France.
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33
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Isakov N. ITIMs and ITAMs. The Yin and Yang of antigen and Fc receptor-linked signaling machinery. Immunol Res 1997; 16:85-100. [PMID: 9048210 DOI: 10.1007/bf02786325] [Citation(s) in RCA: 73] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
The initial stages of an immune response are regulated at the level of the cell-surface antigen and Fc receptors. The extracellular portions of these receptors provide immune specificity and determine the nature of the responding effector cells, whereas the intracellular portion transduces signals into the cell and determines the intensity and duration of the immune response. Recent studies led to the identification of two types of modules within the cytoplasmic region of receptor subunits that are critical for the activation and termination of signal transduction pathways. Phosphorylation of the conserved tyrosine residues within the two modules, the immunoreceptor tyrosine-based activation motif (ITAM) and the immunoreceptor tyrosine-based inhibition motif (ITIM), is followed by the recruitment of different sets of SH2-containing molecules to the receptor site. These proteins regulate the receptor-linked signal transduction pathways in a positive or a negative fashion, which is a reminiscent of the ancestral Yin-Yang principle.
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Affiliation(s)
- N Isakov
- Department of Microbiology and Immunology, Faculty of Health Sciences, Ben Gurion University of the Negev, Beer Sheva, Israel
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34
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Abstract
This review deals with membrane Fc receptors (FcR) of the immunoglobulin superfamily. It is focused on the mechanisms by which FcR trigger and regulate biological responses of cells on which they are expressed. FcR deliver signals when they are aggregated at the cell surface. The aggregation of FcR having immunoreceptor tyrosine-based activation motifs (ITAMs) activates sequentially src family tyrosine kinases and syk family tyrosine kinases that connect transduced signals to common activation pathways shared with other receptors. FcR with ITAMs elicit cell activation, endocytosis, and phagocytosis. The nature of responses depends primarily on the cell type. The aggregation of FcR without ITAM does not trigger cell activation. Most of these FcR internalize their ligands, which can be endocytosed, phagocytosed, or transcytosed. The fate of internalized receptor-ligand complexes depends on defined sequences in the intracytoplasmic domain of the receptors. The coaggregation of different FcR results in positive or negative cooperation. Some FcR without ITAM use FcR with ITAM as signal transduction subunits. The coaggregation of antigen receptors or of FcR having ITAMs with FcR having immunoreceptor tyrosine-based inhibition motifs (ITIMs) negatively regulates cell activation. FcR therefore appear as the subunits of multichain receptors whose constitution is not predetermined and which deliver adaptative messages as a function of the environment.
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Affiliation(s)
- M Daëron
- Laboratoire d'Immunologie Cellulaire et Clinique, INSERM U.255, Institut Curie, Paris, France.
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35
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Abstract
The acronym (ITAM) for immunoreceptor tyrosine-based activation motif was first proposed in September 1994, during the 8th Meeting on Signals and Signal Processing in the Immune System held in Kecskemet, Hungary, to designate the di-tyrosine-based YxxL activation motifs that had been previously understood by Michael Reth to account for the cell-triggering properties of BCR, TCR and FcR. It was then agreed, by those who signed the collective letter John Cambier had been commissioned to submit to Immunology Today (Cambier, J.C. (1994) Immunol. Today 16, 110-110) that it was premature to propose ITIM (for immunoreceptor tyrosine-based inhibition motif) to designate the one inhibitory sequence containing a single Ys1L motif that had been identified in the intracytoplasmic domain of a low-affinity Fc receptor for IgG. Right away, ITAM became unanimously accepted and widely used in the literature. Remarkably, ITIM was soon adopted too and, in September 1996, a whole session of the 9th Signal Meeting, held in Tihany, Hungary, was devoted to ITIM. During the last 2 years, evidence accumulated that indeed accredited the ITIM concept.
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Affiliation(s)
- M Daëron
- Laboratoire d'Immunologie Cellulaire et Clinique, INSERM U255, Institut Curie, Paris, France.
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36
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Guy-Grand D, Cuénod-Jabri B, Malassis-Seris M, Selz F, Vassalli P. Complexity of the mouse gut T cell immune system: identification of two distinct natural killer T cell intraepithelial lineages. Eur J Immunol 1996; 26:2248-56. [PMID: 8814274 DOI: 10.1002/eji.1830260942] [Citation(s) in RCA: 103] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Gut thymo-dependent (CD8 alpha + beta + or CD4+) or -independent (CD8 alpha + beta -) intraepithelial lymphocytes (IEL) mediate cytotoxicity following T cell receptor (TCR)-CD3 signaling, but only TCR gamma delta + and alpha beta + thymo-independent IEL show cytotoxicity of natural killer (NK) and antibody-dependent cell-mediated cytotoxicity types. Moreover, TCR alpha beta + and gamma delta + thymo-independent IEL express NK receptors, and may therefore be referred to as NK-TIEL. NK-TIEL cytotoxicity is mediated through perforin, Fas, or both pathways. In contrast to that of other NK cells, this cytotoxicity is not negatively regulated by signals delivered through the recognition of major histocompatibility complex class I molecules. Thus, gut IEL include T cell subsets with unique specificities and functions, ontogenically distinct from other T cell lineages, which may increase the antigenic repertoire diversity of the immune system participating in the defense of the epithelial barrier.
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MESH Headings
- Animals
- Antibody-Dependent Cell Cytotoxicity
- CD3 Complex/physiology
- Cell Differentiation
- Cytotoxicity, Immunologic
- Histocompatibility Antigens Class I/analysis
- Interleukin-12/pharmacology
- Interleukin-2/pharmacology
- Intestines/immunology
- Killer Cells, Natural/immunology
- Mice
- Mice, Inbred C3H
- Mice, Inbred C57BL
- Mice, Inbred DBA
- Receptors, Antigen, T-Cell, alpha-beta/analysis
- Receptors, Antigen, T-Cell, gamma-delta/analysis
- fas Receptor/physiology
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Affiliation(s)
- D Guy-Grand
- INSERM U.429 Hôpital Necker, Enfants Malades, Paris, France
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37
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Daëron M, Latour S, Malbec O, Espinosa E, Pina P, Pasmans S, Fridman WH. The same tyrosine-based inhibition motif, in the intracytoplasmic domain of Fc gamma RIIB, regulates negatively BCR-, TCR-, and FcR-dependent cell activation. Immunity 1995; 3:635-46. [PMID: 7584153 DOI: 10.1016/1074-7613(95)90134-5] [Citation(s) in RCA: 370] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
The cell-triggering properties of BCR, TCR and FcR depend on structurally related immunoreceptor tyrosine-based activation motifs (ITAMs). Fc gamma RIIB have no ITAM and do not trigger cell activation. When coaggregated to BCR, they inhibit B cell activation. We show here that, when coaggregated to these receptors, Fc gamma RIIB inhibit Fc epsilon RI-, Fc gamma RIIA-, and TCR-dependent cell activation. Inhibition also affected cell activation by single ITAMs, in isolated FcR or TCR subunits. The same tyrosine-based inhibitory motif (ITIM), which is highly conserved in murine and human Fc gamma RIIB and that was previously shown to inhibit BCR-dependent B cell activation, was required to regulate TCR- and FcR-dependent cell activation. Our findings endow Fc gamma RIIB, and thus IgG antibodies, with general immunoregulatory properties susceptible to act on all ITAM-containing receptors.
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MESH Headings
- Amino Acid Sequence
- Animals
- Basophils
- Down-Regulation/genetics
- Histamine Release/physiology
- Humans
- Lymphocyte Activation/immunology
- Mice
- Mice, Inbred BALB C
- Mice, Inbred DBA
- Molecular Sequence Data
- Rats
- Receptors, Antigen, B-Cell/metabolism
- Receptors, Antigen, T-Cell/metabolism
- Receptors, Fc/metabolism
- Receptors, IgE/metabolism
- Receptors, IgG/chemistry
- Receptors, IgG/physiology
- Serotonin/metabolism
- Tumor Cells, Cultured
- Tyrosine/chemistry
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Affiliation(s)
- M Daëron
- Laboratoire d'Immunologie Cellulaire et Clinique, Institut National de la Santé et de la Recherche Médicale U255, Institut Curie, Paris, France
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38
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Witte T, Hartung K, Bode FM, Schmidt RE, Deicher H. Characterization of B-cell lines from SLE patients and their relatives. Rheumatol Int 1995; 15:89-93. [PMID: 8588125 DOI: 10.1007/bf00302123] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
Epstein-Barr-virus (EBV)-transformed lymphoblastoid B-cell lines were generated from peripheral blood lymphocytes of 55 patients with systemic lupus erythematosus (SLE) and 44 healthy relatives. All donors have previously been extensively characterized with regard to clinical, serologic, and genetic parameters. Here, peripheral blood lymphocytes and lines were characterized for cell surface antigens. Furthermore, autoantibody production and proliferation rate of the cell lines were monitored. A significant difference between patients and relatives was the lower proliferation rate of EBV-transformed cell lines of the SLE patients. All SLE cell lines are available for interested researches and can be obtained from the European Cell Bank, Salisbury, UK.
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Affiliation(s)
- T Witte
- Harvard Medical School, Dana-Farber Cancer Institute, Division of Immunology, Boston, MA 02115, USA
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39
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Sarmay G, Rozsnyay Z, Koncz G, Gergely J. Interaction of signaling molecules with human Fc gamma RIIb1 and the role of various Fc gamma RIIb isoforms in B-cell regulation. Immunol Lett 1995; 44:125-31. [PMID: 7797241 DOI: 10.1016/0165-2478(95)00203-h] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The low-affinity type-IIb IgG Fc-binding receptors (Fc gamma RIIb) are expressed on B cells. When cross-linked with mIgM Fc gamma RIIb are known to down-regulate B-cell activation by interrupting signal transduction upstream from G-protein-activated events. We have studied Fc gamma RII isoforms expressed on resting and activated B cells and the interaction of Fc gamma RIIb1 with molecules transducing the antigen receptor-mediated signals. Expression of Fc gamma RII isoforms was studied by reverse transcription and polymerase chain reaction. Resting B cells express both Fc gamma RIIb2 and Fc gamma RIIb1 isoforms. Activation with anti-IgM or IL-4 induces the splicing of Fc gamma RIIb1 mRNA, while the alternative splicing of Fc gamma RIIb2 mRNA is down-regulated, resulting in the surface expression of Fc gamma RIIb1. Functional differences were found between the two isoforms in inhibiting B-cell activation, suggesting that Fc gamma RIIb2 might influence the threshold of signals necessary for activation of resting B cells, while Fc gamma RIIb1 may regulate in later phases of antibody response. To explore the mechanism by which Fc gamma RII may uncouple antigen receptor-mediated signal transduction, we have investigated the association of signaling molecules with Fc gamma RII. Beside the protein tyrosine kinase (PTK) fyn, protein kinase C (PKC) was found to be co-isolated with Fc gamma RIIb1, suggesting a tight connection between these kinases and Fc gamma RII. We suggest that PKC might be responsible for the activation-induced phosphorylation of Fc gamma RII on serine residues.(ABSTRACT TRUNCATED AT 250 WORDS)
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Affiliation(s)
- G Sarmay
- Laboratory of Immunoregulation, Vienna International Research Cooperation Center, Sandoz Forschungsinstitut, Austria
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40
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Daëron M, Malbec O, Latour S, Espinosa E, Pina P, Fridman WH. Regulation of tyrosine-containing activation motif-dependent cell signalling by Fc gamma RII. Immunol Lett 1995; 44:119-23. [PMID: 7797240 DOI: 10.1016/0165-2478(94)00202-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Crosslinking of the B-cell receptor (BCR) for antigen to low-affinity receptors for IgG (Fc gamma RII) inhibits B-cell activation induced by BCR aggregation. The cell-triggering properties of the BCR depend on tyrosine-containing activation motifs (TAM), in the intracytoplasmic domain of its Ig alpha and Ig beta subunits. TAMs also account for the cell-triggering capabilities of the T-cell receptor (TCR) for antigen, in T lymphocytes, and of the high-affinity receptor for IgE (Fc epsilon RI), in mast cells. Using as a model, rat basophilic leukemia cells (RBL-2H3) stably transfected with cDNA encoding wild-type or mutated murine or human Fc gamma RIIB and chimeric molecules having the intracytoplasmic domain of the FcR gamma subunit or of TCR-CD3 zeta subunit, we found that the inhibitory properties of Fc gamma RII are neither restricted to B cells nor to BCR-dependent cell activation, but can be extended to other cells and, as a general rule, to TAM-dependent cell activation.
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Affiliation(s)
- M Daëron
- Laboratoire d'Immunologie Cellulaire et Clinique, INSERM U255, Institut Curie, Paris, France
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41
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Sármay G, Rozsnyay Z, Koncz G, Danilkovich A, Gergely J. The alternative splicing of human Fc gamma RII mRNA is regulated by activation of B cells with mIgM cross-linking, interleukin-4, or phorbolester. Eur J Immunol 1995; 25:262-8. [PMID: 7843241 DOI: 10.1002/eji.1830250143] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The human type two IgG binding receptors (Fc gamma RII) are encoded by three genes (Fc gamma RIIA, -B and C) resulting in at least six protein isoforms generated by alternative mRNA splicing. Surface expression of Fc gamma RII has been shown to be modulated during B cell activation, although data characterizing the isoform(s) expressed are not available. The extracellular as well as the transmembrane domains of various Fc gamma RII are highly homologous. Only the intracellular domains vary between the different Fc gamma RII isoforms, suggesting differences in signal transduction. Using reverse transcriptase and polymerase chain reaction of mRNA obtained from resting tonsil B cells, we show that the majority of Fc gamma RII mRNA species to be of b2 type, although b1 type and a low level of Fc gamma RIIa type are also present. Culturing the cells for 18 h in the presence of 2.5 U/ml interleukin-4 or 10 micrograms/ml affinity-purified anti-IgM F(ab')2 fragments induced a switch in alternative splicing, resulting in a significant increase of Fc gamma RIIb1 mRNA expression, while the synthesis of Fc gamma RIIb2 mRNA was down-regulated. Stimulation of B cells with 100 ng/ml phorbol 12-myristate 13-acetate induced similar alteration, although only after 48-h treatment. The accumulation of Fc gamma RIIb1 and the reduction of both Fc gamma RIIb2 and Fc gamma RIIa mRNA in activated cells is accompanied by the enhanced expression of Fc gamma RII on the cell surface, representing most probably the Fc gamma RIIb1 isoform. Heat-aggregated IgG inhibited the anti-IgM-induced proliferation of resting but not that of activated B cells, suggesting that aggregation of Fc gamma RIIb2 constitutively expressed on resting B cells might be responsible for the prevention of inadequate activation of resting B cells.
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Affiliation(s)
- G Sármay
- Laboratory of Immunoregulation, Vienna International Research Cooperation Center at SFI, Austria
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42
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Bouchard C, Fridman WH, Sautès C. Mechanism of inhibition of lipopolysaccharide-stimulated mouse B-cell responses by transforming growth factor-beta 1. Immunol Lett 1994; 40:105-10. [PMID: 8088868 DOI: 10.1016/0165-2478(94)90180-5] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
Transforming growth factor-beta 1 (TGF beta 1) is a pleiotropic cytokine which inhibits growth of many cell types and positively or negatively regulates the production of Ig isotypes. By using mouse resting B cells stimulated by lipopolysaccharide (LPS), we investigated whether the effect of TGF beta 1 on Ig production is related to its effect on cell growth. We show that low doses of TGF beta 1 stimulate IgG3 and IgG2b production whereas higher doses inhibit IgM, IgG3, IgG1 and IgG2b secretion and cell proliferation. TGF beta 1 titration curves and kinetics experiments suggested that the inhibitory effect on Ig secretion and B-cell growth are closely related. We defined the phase at which TGF beta 1 exerts its anti-proliferative effect on mouse B cells. TGF beta 1 does not modify the increase in expression of class II antigens which occurs before transition from G0 to G1. However, it partially inhibits the induction of expression of low-affinity Fc gamma RII and cell enlargement which both begin during the early G1 phase, and it totally blocks induction of the expression of transferrin receptors, a marker of the late G1 phase. Thus, TGF beta 1 blocks LPS-stimulated mouse B cells in the early G1 phase, and this results in inhibition of Ig production.
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Affiliation(s)
- C Bouchard
- INSERM U255, Institut Curie, Paris, France
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43
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44
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Affiliation(s)
- M D Hulett
- Austin Research Institute, Heidelberg, Australia
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45
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Caraujo-Jorge T, el Bouhdidi A, Rivera MT, Daëron M, Carlier Y, Jorge TA [corrected to Caraujo-Jorge T]. Trypanosoma cruzi infection in mice enhances the membrane expression of low-affinity Fc receptors for IgG and the release of their soluble forms. Parasite Immunol 1993; 15:539-46. [PMID: 7877851 DOI: 10.1111/j.1365-3024.1993.tb00642.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
The membrane expression of low-affinity Fc receptors for IgG (Fc gamma RII/III) on cells and the number of Fc gamma RII/III(+) cells were studied by flow cytometry, using the 2.4G2 MoAb, in mice infected by Trypanosoma cruzi. Cells from spleen, mesenteric lymph nodes and peritoneum were collected on days 10, 20, 30 and 40 post infection (p.i.). The in vivo serum level of soluble Fc gamma RII/III, as well as its in vitro release by cells from infected mice were studied. Parasitaemia and IgG1, IgG2a and IgG2b T. cruzi-specific antibody titres were also recorded. Both the expression of Fc gamma R on cell membrane and the absolute number of Fc gamma R(+) cells increased in spleen and in mesenteric lymph nodes, but not in peritoneum. The modifications in spleen occurred in the early and late parasitaemic phase of infection, i.e., before and after detection of T. cruzi-specific antibodies (from day 10 to 40 p.i.). In mesenteric lymph nodes, the variations were observed only in the early acute infection, when antibodies were not yet detectable at significant levels (on days 10 and 20 p.i.). Higher levels of soluble Fc gamma R were detected in sera and in culture supernatants of spleen and lymph node cells from day 20 to 40 p.i. These results show that T. cruzi infection in mice upregulates the expression and the release of Fc gamma RII/III, in the acute phase of infection, before as well as after the rise of antibody response.
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Affiliation(s)
- T Caraujo-Jorge
- Departamento de Ultraestrutura e Biologia Celular, Fondação Oswaldo Cruz, Rio de Janeiro, Brasil
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46
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Abstract
Fc receptors are a family of membrane-associated and soluble glycoproteins that mediate a vast array of functions triggered by immune complexes. The structures of murine and human Fc gamma and Fc epsilon receptors have been elucidated and the motifs involved in the activities that they mediate characterized during the past year. B-cell activation and differentiation may be enhanced by different Fc receptor isoforms either through an increased presentation of antigen associated with IgG (Fc gamma RIIb2, Fc gamma RIII, Fc epsilon RII), or the induction of cytokine synthesis by mast cells (Fc epsilon RI, Fc gamma RIII) and natural killer cells (Fc gamma RIII). Conversely, the crosslinking of Fc gamma RIIb1 to membrane Ig inhibits B-cell activation. Soluble forms of Fc receptor also regulate antibody production by enhancing interleukin-4-induced IgE synthesis (Fc epsilon RII) or inhibiting IgG synthesis (Fc gamma R). Different structural motifs are responsible for the different biological activities of each Fc receptor isoform.
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Affiliation(s)
- W H Fridman
- INSERM Unit 255 Institut Curie, Paris, France
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47
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Choquet D, Partiseti M, Amigorena S, Bonnerot C, Fridman WH, Korn H. Cross-linking of IgG receptors inhibits membrane immunoglobulin-stimulated calcium influx in B lymphocytes. J Cell Biol 1993; 121:355-63. [PMID: 8468351 PMCID: PMC2200100 DOI: 10.1083/jcb.121.2.355] [Citation(s) in RCA: 94] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
By cross-linking membrane immunoglobulins (mIg), the antigenic stimulation of B lymphocytes induces an increase in intracellular free calcium levels ([Ca2+]i) because of a combination of release from intracellular stores and transmembrane influx. It has been suggested that both events are linked, as in a number of other cases of receptor-induced increase in [Ca2+]i. Conversely, in B lymphocytes, type II receptors for the Fc fragment of IgG (Fc gamma RII) inhibit mIg-mediated signaling. Thus, we have investigated at the level of single cells if these receptors could act on specific phases of mIg Ca2+ signaling. Lipopolysaccharide-activated murine B splenocytes and B lymphoma cells transfected with intact or truncated Fc gamma RII-cDNA were used to determine the domains of Fc gamma RII implicated in the inhibition of the Ca2+ signal. [Ca2+]i was measured in single fura-2-loaded cells by microfluorometry. The phases of release from intracellular stores and of transmembrane influx were discriminated by using manganese, which quenches fura-2, in the external medium as a tracer for bivalent cation entry. The role of membrane potential was studied by recording [Ca2+]i in cells voltage-clamped using the perforated patch-clamp method. Cross-linking of mIgM or mIgG with F(ab')2 fragments of anti-Ig antibodies induced a sustained rise in [Ca2+]i due to an extremely fast and transitory release of Ca2+ from intracellular stores and a long lasting transmembrane Ca2+ influx. The phase of influx, but not that of release, was inhibited by membrane depolarization. The increase in [Ca2+]i occurred after a delay inversely related to the dose of ligand. Co-cross-linking mIgs and Fc gamma RII with intact anti-Ig antibodies only triggered transitory release of Ca2+ from intracellular stores but no Ca2+ influx, even when the cell was voltage-clamped at negative membrane potentials. These transitory Ca2+ rises had similar amplitudes and delays to those induced by cross-linking mIgs alone. Thus, our data show that Fc gamma RII does not mediate an overall inhibition of mIg signaling but specifically affects transmembrane Ca2+ influx without affecting the release of Ca2+ from intracellular stores. Furthermore, this inhibition is not mediated by cell depolarization. Thus, Fc gamma RII represents a tool to dissociate physiologically the phases of release and transmembrane influx of Ca2+ triggered through antigen receptors.
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Affiliation(s)
- D Choquet
- Laboratoire de Neurobiologie Cellulaire, Institut National de la Santé de la Recherche Médicale (INSERM) U261, Institut Pasteur, 75724 Paris, France
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48
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Shenker BJ, Berthold P, Rooney C, Vitale L, DeBolt K, Shapiro IM. Immunotoxic effects of mercuric compounds on human lymphocytes and monocytes. III. Alterations in B-cell function and viability. Immunopharmacol Immunotoxicol 1993; 15:87-112. [PMID: 8450183 DOI: 10.3109/08923979309066936] [Citation(s) in RCA: 51] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
The major goal of the study was to determine the effects of high and low levels of mercury on human B-cells. Following treatment of B-cells with HgCl2 (0-1000 ng) and MeHgCl2 (0-100 ng), their activation by mitogens was evaluated. Both forms of mercury caused a dose dependent reduction in B-cell proliferation in the presence or absence of monocytes. MeHgCl was approximately 10 times more potent than HgCl2. Mercury also inhibited the ability of these cells to synthesize IgM and IgG. Analysis of the expression of activation markers indicated that CD69, an early marker of cell activation, was not effected by mercury. In comparison, B-cell expression of the low affinity IgE receptor and the transferrin receptor were significantly reduced. Of particular interest, cells activated by mitogen for 48 hr became refractory to the immunotoxic effects of mercury. When exposed to high levels of HgCl2 (0.5-10 micrograms/ml) and MeHgCl (0.05-1 micrograms/ml), there was minimal reduction in B-cell viability at 1-4 hr, however, after exposure to mercury for 24 hr, cell death was apparent. MeHgCl was approximately 5-10 times more potent than HgCl2. Electron microscopic analysis revealed early nuclear alterations characterized by hyperchromaticity, nuclear fragmentation and condensation of nucleoplasm. Both forms of mercury caused a rapid and sustained elevation in the intracellular levels of Ca++. The results of this investigation clearly show that mercury-containing compounds are immunomodulatory; moreover, the decrease in B-cell function indicates that this metal is immunotoxic at very low exposure levels. Furthermore, the cytotoxic events are consistent with the notion that mercury initiates changes associated with programmed cell death.
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Affiliation(s)
- B J Shenker
- Department of Pathology, University of Pennsylvania School of Dental Medicine, Philadelphia 19104-6002
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49
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Dubois JM, Rouzaire-Dubois B. Role of potassium channels in mitogenesis. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 1993; 59:1-21. [PMID: 8419984 DOI: 10.1016/0079-6107(93)90005-5] [Citation(s) in RCA: 116] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Affiliation(s)
- J M Dubois
- Laboratoire de Physiologie cellulaire, URA CNRS 1121, Université Paris Sud, Orsay, France
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Sautès C, Mazières N, Galinha A, Tartour E, Bonnerot C, Amigorena S, Teillaud C, Spagnoli R, Fridman WH. Murine soluble Fc gamma receptors/IgG-binding factors (IgG-BF): analysis of the relation to Fc gamma RII and production of milligram quantities of biologically active recombinant IgG-BF. Immunol Res 1992; 11:181-90. [PMID: 1287114 DOI: 10.1007/bf02919125] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
The production of soluble forms of low-affinity Fc gamma R by cells expressing recombinant or natural membrane Fc gamma RII, and the structural relationships between these soluble receptors and membrane Fc gamma RII are described. We show that 37-40 kD soluble Fc gamma RII, corresponding to the two N-terminal domains of Fc gamma RII and binding to IgG, are spontaneously produced in vitro by cleavage of membrane Fc gamma RII. Moreover, we describe methods to produce and purify to homogeneity large quantities of endotoxin-free recombinant IgG-binding factor (rIgG-BF) from the culture medium of a cell line transfected with a mutated Fc gamma RII cDNA. These methods include the use of bioreactors for culturing transfected fibroblasts and the purification of rIgG-BF by ion-exchange chromatography and hydrophobic-interaction chromatography. By using such procedures, about 2.4 mg of rIgG-BF were purified from 1 liter of culture medium of transfected fibroblasts. Like natural IgG-BF, the 95-99% pure rIgG-BF suppressed, in a dose-dependent manner, secondary in vitro IgG antibody responses to sheep red blood cells.
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Affiliation(s)
- C Sautès
- INSERM U. 255, Institut Curie, Paris, France
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