1
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Shao W, Wang Y, Fang Q, Shi W, Qi H. Epigenetic recording of stimulation history reveals BLIMP1-BACH2 balance in determining memory B cell fate upon recall challenge. Nat Immunol 2024; 25:1432-1444. [PMID: 38969872 DOI: 10.1038/s41590-024-01900-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2023] [Accepted: 06/17/2024] [Indexed: 07/07/2024]
Abstract
Memory B cells (MBCs) differentiate into plasma cells (PCs) or germinal centers (GCs) upon antigen recall. How this decision is programmed is not understood. We found that the relative strength between two antagonistic transcription factors, B lymphocyte-induced maturation protein 1 (BLIMP1) and BTB domain and CNC homolog 2 (BACH2), progressively increases in favor of BLIMP1 in antigen-responding B cells through the course of primary responses. MBC subsets that preferentially produce secondary GCs expressed comparatively higher BACH2 but lower BLIMP1 than those predisposed for PC development. Skewing the BLIMP1-BACH2 balance in otherwise fate-predisposed MBC subsets could switch their fate preferences. Underlying the changing BLIMP1-over-BACH2 balance, we observed progressively increased accessibilities at chromatin loci that are specifically opened in PCs, particularly those that contain interferon-sensitive response elements (ISREs) and are controlled by interferon regulatory factor 4 (IRF4). IRF4 is upregulated by B cell receptor, CD40 or innate receptor signaling and it induces graded levels of PC-specifying epigenetic imprints according to the strength of stimulation. By analyzing history-stamped GC B cells, we found progressively increased chromatin accessibilities at PC-specific, IRF4-controlled gene loci over time. Therefore, the cumulative stimulation history of B cells is epigenetically recorded in an IRF4-dependent manner, determines the relative strength between BLIMP1 and BACH2 in individual MBCs and dictates their probabilities to develop into GCs or PCs upon restimulation.
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Affiliation(s)
- Wen Shao
- Tsinghua-Peking Center for Life Sciences, Beijing, China
- Laboratory of Dynamic Immunobiology, Institute for Immunology, Beijing, China
- Department of Basic Medical Sciences, School of Medicine, Beijing, China
- New Cornerstone Science Laboratory, School of Medicine, Tsinghua University, Beijing, China
- Changping Laboratory, Beijing, China
| | - Yifeng Wang
- Tsinghua-Peking Center for Life Sciences, Beijing, China
- Laboratory of Dynamic Immunobiology, Institute for Immunology, Beijing, China
- Department of Basic Medical Sciences, School of Medicine, Beijing, China
- Changping Laboratory, Beijing, China
| | - Qian Fang
- Tsinghua-Peking Center for Life Sciences, Beijing, China
- Laboratory of Dynamic Immunobiology, Institute for Immunology, Beijing, China
- Department of Basic Medical Sciences, School of Medicine, Beijing, China
| | - Wenjuan Shi
- SXMU-Tsinghua Collaborative Innovation Center for Frontier Medicine, Shanxi Medical University, Taiyuan, China
| | - Hai Qi
- Tsinghua-Peking Center for Life Sciences, Beijing, China.
- Laboratory of Dynamic Immunobiology, Institute for Immunology, Beijing, China.
- Department of Basic Medical Sciences, School of Medicine, Beijing, China.
- New Cornerstone Science Laboratory, School of Medicine, Tsinghua University, Beijing, China.
- Changping Laboratory, Beijing, China.
- SXMU-Tsinghua Collaborative Innovation Center for Frontier Medicine, Shanxi Medical University, Taiyuan, China.
- Beijing Key Laboratory for Immunological Research on Chronic Diseases, Tsinghua University, Beijing, China.
- Beijing Frontier Research Center for Biological Structure, Tsinghua University, Beijing, China.
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2
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Abdel-Wahab ND, Kabil MF, El-Sherbiny IM, Salama MF, El-Sayed G, El-Sherbini ES. Potential anticancer effect of free and nanoformulated Deferasirox for breast cancer treatment: in-vitro and in-vivo evaluation. Drug Dev Ind Pharm 2024; 50:223-235. [PMID: 38305197 DOI: 10.1080/03639045.2024.2314189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2024] [Accepted: 01/30/2024] [Indexed: 02/03/2024]
Abstract
BACKGROUND Breast cancer (BC) stands as the second-leading cause of mortality among women worldwide. Many chemotherapeutic treatments for BC come with significant adverse effects. Additionally, BC is recognized as one of the most resistant forms of malignancy to treatment. Consequently, there exists a critical need for innovative therapeutic agents that are both highly effective and exhibit reduced toxicity and side effects for patients. Deferasirox (DFX), an iron-chelating drug approved by the FDA for oral use, emerges as a promising contender in the fight against BC proliferation. DFX, primarily administered orally, is utilized to address chronic iron excess resulting from blood transfusions, and it is the inaugural treatment for chronic iron overload syndrome. However, DFX encounters limitations due to its poor water solubility. AIM This study aimed at incorporating DFX into lipid nanocapsules (DFX-LNCs) followed by investigating the anticancer effect of the DFX nanoform as compared to free DFX in-vitro and on an orthotopic BC mouse model in-vivo. METHODS The DFX-LNCs was prepared and imaged using TEM and also characterized in terms of particle size (PS), zeta potential (ZP), and polydispersity index (PDI) using DLS. Moreover, drug release, cytotoxicity, and anticancer effect were assessed in-vitro, and in-vivo. RESULTS The results revealed that DFX-LNCs are more cytotoxic than free DFX with IC50 of 4.417 µg/ml and 16.114 µg/ml, respectively, while the plain LNCs didn't show any cytotoxic effect on the 4T1 cell line (IC50 = 122.797 µg/ml). Besides, the apoptotic effect of DFX-LNCs was more pronounced than that of free DFX, as evidenced by Annexin V/PI staining, increased BAX expression, and decreased expression of BcL-2. Moreover, DFX-LNCs showed a superior antitumor effect in-vivo with potent antioxidant and anti-proliferative effects. CONCLUSION The newly developed DFX nanoform demonstrated a high potential as a promising therapeutic agent for BC treatment.
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Affiliation(s)
- Nadeen Diaa Abdel-Wahab
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Mansoura University, Egypt
| | - Mohamed Fawzi Kabil
- Nanomedicine Research Labs, Center for Materials Science, Zewail City of Science and Technology, Giza, Egypt
| | - Ibrahim M El-Sherbiny
- Nanomedicine Research Labs, Center for Materials Science, Zewail City of Science and Technology, Giza, Egypt
| | - Mohamed F Salama
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Mansoura University, Egypt
| | - Gehad El-Sayed
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Mansoura University, Egypt
| | - El-Said El-Sherbini
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Mansoura University, Egypt
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3
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Robinson MJ, Ding Z, Dowling MR, Hill DL, Webster RH, McKenzie C, Pitt C, O'Donnell K, Mulder J, Brodie E, Hodgkin PD, Wong NC, Quast I, Tarlinton DM. Intrinsically determined turnover underlies broad heterogeneity in plasma-cell lifespan. Immunity 2023:S1074-7613(23)00183-8. [PMID: 37164016 DOI: 10.1016/j.immuni.2023.04.015] [Citation(s) in RCA: 21] [Impact Index Per Article: 21.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2022] [Revised: 02/24/2023] [Accepted: 04/14/2023] [Indexed: 05/12/2023]
Abstract
Antibodies produced by antibody-secreting plasma cells (ASCs) underlie multiple forms of long-lasting immunity. Here we examined the mechanisms regulating ASC turnover and persistence using a genetic reporter to time-stamp ASCs. This approach revealed ASC lifespans as heterogeneous and falling on a continuum, with only a small fraction surviving for >60 days. ASC longevity past 60 days was independent of isotype but correlated with a phenotype that developed progressively and ultimately associated with an underlying "long-lived" ASC (LL ASC)-enriched transcriptional program. While some of the differences between LL ASCs and other ASCs appeared to be acquired with age, other features were shared with some younger ASCs, such as high CD138 and CD93. Turnover was unaffected by altered ASC production, arguing against competition for niches as a major driver of turnover. Thus, ASC turnover is set by intrinsic lifespan limits, with steady-state population dynamics governed by niche vacancy rather than displacement.
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Affiliation(s)
- Marcus James Robinson
- Department of Immunology, Alfred Medical Research and Education Precinct, Monash University, Melbourne, VIC 3004, Australia.
| | - Zhoujie Ding
- Department of Immunology, Alfred Medical Research and Education Precinct, Monash University, Melbourne, VIC 3004, Australia
| | - Mark R Dowling
- Department of Clinical Haematology, Royal Melbourne Hospital and Peter MacCallum Cancer Centre, 305 Grattan St, Parkville, VIC 3000, Australia; Immunology Division, The Walter and Eliza Hall Institute, 1G Royal Parade, Parkville, VIC 3050, Australia; Sir Peter MacCallum Department of Oncology, The University of Melbourne, Parkville, VIC 3052, Australia; Department of Medical Biology, The University of Melbourne, Parkville, VIC 3052, Australia
| | - Danika L Hill
- Department of Immunology, Alfred Medical Research and Education Precinct, Monash University, Melbourne, VIC 3004, Australia
| | - Rosela H Webster
- Department of Immunology, Alfred Medical Research and Education Precinct, Monash University, Melbourne, VIC 3004, Australia
| | - Craig McKenzie
- Department of Immunology, Alfred Medical Research and Education Precinct, Monash University, Melbourne, VIC 3004, Australia
| | - Catherine Pitt
- Department of Immunology, Alfred Medical Research and Education Precinct, Monash University, Melbourne, VIC 3004, Australia
| | - Kristy O'Donnell
- Department of Immunology, Alfred Medical Research and Education Precinct, Monash University, Melbourne, VIC 3004, Australia
| | - Jesse Mulder
- Department of Immunology, Alfred Medical Research and Education Precinct, Monash University, Melbourne, VIC 3004, Australia
| | - Erica Brodie
- Department of Immunology, Alfred Medical Research and Education Precinct, Monash University, Melbourne, VIC 3004, Australia; Monash Bioinformatics Platform, Central Clinical School, Alfred Medical Research and Education Precinct, Monash University, Melbourne, VIC 3004, Australia
| | - Philip D Hodgkin
- Immunology Division, The Walter and Eliza Hall Institute, 1G Royal Parade, Parkville, VIC 3050, Australia; Department of Medical Biology, The University of Melbourne, Parkville, VIC 3052, Australia
| | - Nick C Wong
- Monash Bioinformatics Platform, Central Clinical School, Alfred Medical Research and Education Precinct, Monash University, Melbourne, VIC 3004, Australia
| | - Isaak Quast
- Department of Immunology, Alfred Medical Research and Education Precinct, Monash University, Melbourne, VIC 3004, Australia
| | - David M Tarlinton
- Department of Immunology, Alfred Medical Research and Education Precinct, Monash University, Melbourne, VIC 3004, Australia.
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4
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Szodoray P, Andersen TK, Heinzelbecker J, Imbery JF, Huszthy PC, Stanford SM, Bogen B, Landsverk OB, Bottini N, Tveita A, Munthe LA, Nakken B. Integration of T helper and BCR signals governs enhanced plasma cell differentiation of memory B cells by regulation of CD45 phosphatase activity. Cell Rep 2021; 36:109525. [PMID: 34380042 PMCID: PMC8435664 DOI: 10.1016/j.celrep.2021.109525] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 06/11/2021] [Accepted: 07/22/2021] [Indexed: 12/29/2022] Open
Abstract
Humoral immunity relies on the efficient differentiation of memory B cells (MBCs) into antibody-secreting cells (ASCs). T helper (Th) signals upregulate B cell receptor (BCR) signaling by potentiating Src family kinases through increasing CD45 phosphatase activity (CD45 PA). In this study, we show that high CD45 PA in MBCs enhances BCR signaling and is essential for their effective ASC differentiation. Mechanistically, Th signals upregulate CD45 PA through intensifying the surface binding of a CD45 ligand, Galectin-1. CD45 PA works as a sensor of T cell help and defines high-affinity germinal center (GC) plasma cell (PC) precursors characterized by IRF4 expression in vivo. Increasing T cell help in vitro results in an incremental CD45 PA increase and enhances ASC differentiation by facilitating effective induction of the transcription factors IRF4 and BLIMP1. This study connects Th signals with BCR signaling through Galectin-1-dependent regulation of CD45 PA and provides a mechanism for efficient ASC differentiation of MBCs.
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Affiliation(s)
- Peter Szodoray
- Department of Immunology, University of Oslo and Oslo University Hospital-Rikshospitalet, 0372 Oslo, Norway; K.G. Jebsen Center for B Cell Malignancies, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway.
| | - Tor Kristian Andersen
- Department of Immunology, University of Oslo and Oslo University Hospital-Rikshospitalet, 0372 Oslo, Norway; K.G. Jebsen Center for Influenza Vaccine Research, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Julia Heinzelbecker
- Department of Immunology, University of Oslo and Oslo University Hospital-Rikshospitalet, 0372 Oslo, Norway; K.G. Jebsen Center for B Cell Malignancies, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - John F Imbery
- Department of Immunology, University of Oslo and Oslo University Hospital-Rikshospitalet, 0372 Oslo, Norway; K.G. Jebsen Center for B Cell Malignancies, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Peter C Huszthy
- Department of Immunology, University of Oslo and Oslo University Hospital-Rikshospitalet, 0372 Oslo, Norway
| | - Stephanie M Stanford
- Division of Rheumatology, Allergy and Immunology, Department of Medicine, University of California, San Diego, 9500 Gilman Drive MC #0656, La Jolla, CA 92093, USA
| | - Bjarne Bogen
- Department of Immunology, University of Oslo and Oslo University Hospital-Rikshospitalet, 0372 Oslo, Norway; K.G. Jebsen Center for Influenza Vaccine Research, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Ole B Landsverk
- Department of Pathology, University of Oslo and Oslo University Hospital-Rikshospitalet, 0372 Oslo, Norway
| | - Nunzio Bottini
- Division of Rheumatology, Allergy and Immunology, Department of Medicine, University of California, San Diego, 9500 Gilman Drive MC #0656, La Jolla, CA 92093, USA
| | - Anders Tveita
- Department of Immunology, University of Oslo and Oslo University Hospital-Rikshospitalet, 0372 Oslo, Norway; K.G. Jebsen Center for B Cell Malignancies, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Ludvig A Munthe
- Department of Immunology, University of Oslo and Oslo University Hospital-Rikshospitalet, 0372 Oslo, Norway; K.G. Jebsen Center for B Cell Malignancies, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
| | - Britt Nakken
- Department of Immunology, University of Oslo and Oslo University Hospital-Rikshospitalet, 0372 Oslo, Norway; K.G. Jebsen Center for B Cell Malignancies, Institute of Clinical Medicine, Faculty of Medicine, University of Oslo, Oslo, Norway
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5
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Kitamura D. Mechanisms for the regulation of memory B-cell recall responses in mice. Int Immunol 2021; 33:791-796. [PMID: 34279036 DOI: 10.1093/intimm/dxab042] [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: 06/23/2021] [Accepted: 07/17/2021] [Indexed: 11/14/2022] Open
Abstract
Upon infection by pathogens or vaccination, the adaptive immune system rapidly but transiently produces antibodies. Some weeks later, however, long-lasting immunity is established that protects the host against the same pathogens almost for life through continuous production of antibodies on one hand and the maintenance of cytotoxic T cells on the other, collectively called immunological memory. The antibody-mediated arm, also called serological memory, is mainly exerted by long-lived plasma cells and memory B cells (MBCs). MBCs express receptors for the specific pathogens and circulate to survey the body for almost a life-long period. Upon recognizing the pathogen, MBCs clonally expand and produce a large amount of the specific antibodies to stop the infection, the process called a (memory) recall response. Although such a function of MBCs has long been known, the mechanism of how their performance is regulated has been obscure. This is due to their paucity in the body, lack of definitive surface markers and obscure ontogeny. However, recent studies have revealed the multifold mechanisms by which the recall response of MBCs is regulated: Rapid and enhanced antibody production is due to a mechanism intrinsic to MBCs; namely, upregulated expression levels of surface molecules interacting with T cells and the property of IgG-class antigen receptors; to a property of the responsible subset of MBCs; and to co-stimulation through innate receptors and cytokines. It has also been unveiled that the recall response is negatively regulated by an inhibitory receptor on MBCs and by antigens with repetitive epitopes.
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Affiliation(s)
- Daisuke Kitamura
- Research Institute for Biomedical Sciences,Tokyo University of Science, Yamazaki, Noda, Chiba, Japan
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6
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Abstract
Memory B cells (MBCs) are critical for the rapid development of protective immunity following re-infection. MBCs capable of neutralizing distinct subclasses of pathogens, such as influenza and HIV, have been identified in humans. However, efforts to develop vaccines that induce broadly protective MBCs to rapidly mutating pathogens have not yet been successful. Better understanding of the signals regulating MBC development and function are essential to overcome current challenges hindering successful vaccine development. Here, we discuss recent advancements regarding the signals and transcription factors regulating germinal centre-derived MBC development and function.
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Affiliation(s)
- Brian J Laidlaw
- Division of Allergy and Immunology, Department of Medicine, Washington University School of Medicine, St. Louis, MO, USA.
| | - Jason G Cyster
- Department of Microbiology and Immunology, University of California, San Francisco, San Francisco, CA, USA
- Howard Hughes Medical Institute, University of California, San Francisco, San Francisco, CA, USA
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7
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Lutckii A, Strunz B, Zhirkov A, Filipovich O, Rukoiatkina E, Gusev D, Lobzin Y, Fischler B, Aleman S, Sällberg M, Björkström NK. Evidence for B cell maturation but not trained immunity in uninfected infants exposed to hepatitis C virus. Gut 2020; 69:2203-2213. [PMID: 32341018 DOI: 10.1136/gutjnl-2019-320269] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2019] [Revised: 03/11/2020] [Accepted: 04/03/2020] [Indexed: 12/12/2022]
Abstract
OBJECTIVES Vertical transmission of hepatitis C virus (HCV) is rare compared with other chronic viral infections, despite that newborns have an immature, and possibly more susceptible, immune system. It further remains unclear to what extent prenatal and perinatal exposure to HCV affects immune system development in neonates. DESIGN To address this, we studied B cells, innate immune cells and soluble factors in a cohort of 62 children that were either unexposed, exposed uninfected or infected with HCV. Forty of these infants were followed longitudinally from birth up until 18 months of age. RESULTS As expected, evidence for B cell maturation was observed with increased age in children, whereas few age-related changes were noticed among innate immune cells. HCV-infected children had a high frequency of HCV-specific IgG-secreting B cells. Such a response was also detected in some exposed but uninfected children but not in uninfected controls. Consistent with this, both HCV-exposed uninfected and HCV-infected infants had evidence of early B cell immune maturation with an increased proportion of IgA-positive plasma cells and upregulated CD40 expression. In contrast, actual HCV viraemia, but not mere exposure, led to alterations within myeloid immune cell populations, natural killer (NK) cells and a distinct soluble factor profile with increased levels of inflammatory cytokines and chemokines. CONCLUSION Our data reveal that exposure to, and infection with, HCV causes disparate effects on adaptive B cells and innate immune cell such as myeloid cells and NK cells in infants.
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Affiliation(s)
- Anton Lutckii
- Department of Laboratory Medicine, Karolinska institutet, Stockholm, Sweden.,Pediatric Research and Clinical Center for Infectious Diseases, Saint Petersburg, Russian Federation
| | - Benedikt Strunz
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - Anton Zhirkov
- Pediatric Research and Clinical Center for Infectious Diseases, Saint Petersburg, Russian Federation
| | - Olga Filipovich
- North-Western State Medical University named after I.I.Mechnikov, Saint Petersburg, Russian Federation
| | - Elena Rukoiatkina
- Maternity Hospital No 16, Saint Petersburg, Russian Federation.,Department of Pediatrics, Gynecology and Female Reproductology, Saint Petersburg State Pediatric Medical University, Saint Petersburg, Russian Federation
| | - Denis Gusev
- Center for Prevention and Control of AIDS and Infectious Diseases, Saint Petersburg, Russian Federation
| | - Yuriy Lobzin
- Pediatric Research and Clinical Center for Infectious Diseases, Saint Petersburg, Russian Federation
| | - Björn Fischler
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden.,Department of Pediatrics, Karolinska University Hospital, Stockholm, Sweden
| | - Soo Aleman
- Department of Infectious Diseases, Karolinska University Hospital, Stockholm, Sweden.,Department of Medicine Huddinge, Karolinska Institutet, Stockholm, Sweden
| | - Matti Sällberg
- Department of Laboratory Medicine, Karolinska institutet, Stockholm, Sweden
| | - Niklas K Björkström
- Center for Infectious Medicine, Department of Medicine Huddinge, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
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8
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Moroney JB, Vasudev A, Pertsemlidis A, Zan H, Casali P. Integrative transcriptome and chromatin landscape analysis reveals distinct epigenetic regulations in human memory B cells. Nat Commun 2020; 11:5435. [PMID: 33116135 PMCID: PMC7595102 DOI: 10.1038/s41467-020-19242-6] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2020] [Accepted: 10/01/2020] [Indexed: 01/08/2023] Open
Abstract
Memory B cells (MBCs) are long-lived and produce high-affinity, generally, class-switched antibodies. Here, we use a multiparameter approach involving CD27 to segregate naïve B cells (NBC), IgD+ unswitched (unsw)MBCs and IgG+ or IgA+ class-switched (sw)MBCs from humans of different age, sex and race. Conserved antibody variable gene expression indicates that MBCs emerge through unbiased selection from NBCs. Integrative analyses of mRNAs, miRNAs, lncRNAs, chromatin accessibility and cis-regulatory elements uncover a core mRNA-ncRNA transcriptional signature shared by IgG+ and IgA+ swMBCs and distinct from NBCs, while unswMBCs display a transitional transcriptome. Some swMBC transcriptional signature loci are accessible but not expressed in NBCs. Profiling miRNAs reveals downregulated MIR181, and concomitantly upregulated MIR181 target genes such as RASSF6, TOX, TRERF1, TRPV3 and RORα, in swMBCs. Finally, lncRNAs differentially expressed in swMBCs cluster proximal to the IgH chain locus on chromosome 14. Our findings thus provide new insights into MBC transcriptional programs and epigenetic regulation, opening new investigative avenues on these critical cell elements in human health and disease. Human memory B cells differentiate from naïve B cells and can express different immunoglobulin (Ig) isotypes resulted from class-switch recombination. Here the authors describe, using transcriptional and epigenetic data from human memory B cells and integrated multi-omics analyses, the differentiation regulation and trajectory of IgG+, IgA+ and IgD+ memory B cells.
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Affiliation(s)
- Justin B Moroney
- Department of Microbiology, Immunology & Molecular Genetics, University of Texas Long School of Medicine, UT Health Science Center, San Antonio, TX, 78229, USA
| | - Anusha Vasudev
- Department of Microbiology, Immunology & Molecular Genetics, University of Texas Long School of Medicine, UT Health Science Center, San Antonio, TX, 78229, USA
| | - Alexander Pertsemlidis
- Greehey Children's Cancer Research Institute, University of Texas Long School of Medicine, UT Health Science Center, San Antonio, TX, 78229, USA
| | - Hong Zan
- Department of Microbiology, Immunology & Molecular Genetics, University of Texas Long School of Medicine, UT Health Science Center, San Antonio, TX, 78229, USA
| | - Paolo Casali
- Department of Microbiology, Immunology & Molecular Genetics, University of Texas Long School of Medicine, UT Health Science Center, San Antonio, TX, 78229, USA.
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9
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Robinson MJ, Webster RH, Tarlinton DM. How intrinsic and extrinsic regulators of plasma cell survival might intersect for durable humoral immunity. Immunol Rev 2020; 296:87-103. [DOI: 10.1111/imr.12895] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 06/01/2020] [Accepted: 06/03/2020] [Indexed: 12/11/2022]
Affiliation(s)
- Marcus J. Robinson
- Department of Immunology & Pathology Alfred Medical Research and Education Precinct Monash University Melbourne Vic. Australia
| | - Rosela H. Webster
- Department of Immunology & Pathology Alfred Medical Research and Education Precinct Monash University Melbourne Vic. Australia
| | - David M. Tarlinton
- Department of Immunology & Pathology Alfred Medical Research and Education Precinct Monash University Melbourne Vic. Australia
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10
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Dhenni R, Phan TG. The geography of memory B cell reactivation in vaccine-induced immunity and in autoimmune disease relapses. Immunol Rev 2020; 296:62-86. [PMID: 32472583 DOI: 10.1111/imr.12862] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2020] [Revised: 04/05/2020] [Accepted: 04/27/2020] [Indexed: 12/14/2022]
Abstract
Memory B cells (Bmem) provide an active second layer of defense against re-infection by pathogens that have bypassed the passive first layer provided by neutralizing antibodies. Here, we review recent progress in our understanding of Bmem heterogeneity in terms of their origin (germinal center-dependent vs center-independent), phenotype (canonical vs atypical vs age-associated B cells), trafficking (recirculating vs tissue-resident), and fate (plasma cell vs germinal center differentiation). The development of transgenic models and intravital imaging technologies has made it possible to track the cellular dynamics of Bmem reactivation by antigen, their interactions with follicular memory T cells, and differentiation into plasma cells in subcapsular proliferative foci in the lymph nodes of immune animals. Such in situ studies have reinforced the importance of geography in shaping the outcome of the secondary antibody response. We also review the evidence for Bmem reactivation and differentiation into short-lived plasma cells in the pathogenesis of disease flares in relapsing-remitting autoimmune diseases. Elucidating the mechanisms that control the Bmem fate decision to differentiate into plasma cells or germinal center B cells will aid future efforts to more precisely engineer fit-for-purpose vaccines as well as to treat antibody-mediated autoimmune diseases.
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Affiliation(s)
- Rama Dhenni
- Immunology Division, Garvan Institute of Medical Research, Sydney, NSW, Australia.,St Vincent's Clinical School, Faculty of Medicine, UNSW Sydney, Sydney, NSW, Australia
| | - Tri Giang Phan
- Immunology Division, Garvan Institute of Medical Research, Sydney, NSW, Australia.,St Vincent's Clinical School, Faculty of Medicine, UNSW Sydney, Sydney, NSW, Australia
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11
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Collins CM, Scharer CD, Murphy TJ, Boss JM, Speck SH. Murine gammaherpesvirus infection is skewed toward Igλ+ B cells expressing a specific heavy chain V-segment. PLoS Pathog 2020; 16:e1008438. [PMID: 32353066 PMCID: PMC7217478 DOI: 10.1371/journal.ppat.1008438] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2019] [Revised: 05/12/2020] [Accepted: 02/27/2020] [Indexed: 12/24/2022] Open
Abstract
One of the defining characteristics of the B cell receptor (BCR) is the extensive diversity in the repertoire of immunoglobulin genes that make up the BCR, resulting in broad range of specificity. Gammaherpesviruses are B lymphotropic viruses that establish life-long infection in B cells, and although the B cell receptor plays a central role in B cell biology, very little is known about the immunoglobulin repertoire of gammaherpesvirus infected cells. To begin to characterize the Ig genes expressed by murine gammaherpesvirus 68 (MHV68) infected cells, we utilized single cell sorting to sequence and clone the Ig variable regions of infected germinal center (GC) B cells and plasma cells. We show that MHV68 infection is biased towards cells that express the Igλ light chain along with a single heavy chain variable gene, IGHV10-1*01. This population arises through clonal expansion but is not viral antigen specific. Furthermore, we show that class-switching in MHV68 infected cells differs from that of uninfected cells. Fewer infected GC B cells are class-switched compared to uninfected GC B cells, while more infected plasma cells are class-switched compared to uninfected plasma cells. Additionally, although they are germinal center derived, the majority of class switched plasma cells display no somatic hypermutation regardless of infection status. Taken together, these data indicate that selection of infected B cells with a specific BCR, as well as virus mediated manipulation of class switching and somatic hypermutation, are critical aspects in establishing life-long gammaherpesvirus infection.
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Affiliation(s)
- Christopher M. Collins
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Christopher D. Scharer
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Thomas J. Murphy
- Department of Pharmacology and Chemical Biology, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Jeremy M. Boss
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, United States of America
| | - Samuel H. Speck
- Emory Vaccine Center and Department of Microbiology and Immunology, Emory University School of Medicine, Atlanta, Georgia, United States of America
- * E-mail:
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12
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Sasanuma H, Ozawa M, Yoshida N. RNA-binding protein Ptbp1 is essential for BCR-mediated antibody production. Int Immunol 2020; 31:157-166. [PMID: 30476084 PMCID: PMC6400050 DOI: 10.1093/intimm/dxy077] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2018] [Accepted: 11/21/2018] [Indexed: 11/22/2022] Open
Abstract
The RNA-binding protein polypyrimidine tract-binding protein-1 (Ptbp1) binds to the pyrimidine-rich sequence of target RNA and controls gene expression via post-transcriptional regulation such as alternative splicing. Although Ptbp1 is highly expressed in B lymphocytes, its role to date is largely unknown. To clarify the role of Ptbp1 in B-cell development and function, we generated B-cell-specific Ptbp1-deficient (P1BKO) mice. B-cell development in the bone marrow, spleen and peritoneal cavity of the P1BKO mice was nearly normal. However, the P1BKO mice had significantly lower levels of natural antibodies in serum compared with those of the control mice. To investigate the effect of Ptbp1 deficiency on the immune response in vivo, we immunized the P1BKO mice with T-cell-independent type-2 (TI-2) antigen NP-Ficoll and T-cell-dependent (TD) antigen NP-CGG. We found that B-cell-specific Ptbp1 deficiency causes an immunodeficiency phenotype due to defective production of antibody against both TI-2 and TD antigen. This immunodeficiency was accompanied by impaired B-cell receptor (BCR)-mediated B-cell activation and plasmablast generation. These findings demonstrate that Ptbp1 is essential for the humoral immune response.
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Affiliation(s)
- Hiroki Sasanuma
- Laboratory of Developmental Genetics, Center for Experimental Medicine and Systems Biology, The Institute of Medical Science, The University of Tokyo, Shirokanedai, Minato-ku, Tokyo, Japan
| | - Manabu Ozawa
- Laboratory of Reproductive Systems Biology, Center for Experimental Medicine and Systems Biology, The Institute of Medical Science, The University of Tokyo, Shirokanedai, Minato-ku, Tokyo, Japan
| | - Nobuaki Yoshida
- Laboratory of Developmental Genetics, Center for Experimental Medicine and Systems Biology, The Institute of Medical Science, The University of Tokyo, Shirokanedai, Minato-ku, Tokyo, Japan
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13
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Kawakubo M, Komura H, Goso Y, Okumura M, Sato Y, Fujii C, Miyashita M, Arisaka N, Harumiya S, Yamanoi K, Yamada S, Kakuta S, Kawashima H, Fukuda MN, Fukuda M, Nakayama J. Analysis of A4gnt Knockout Mice Reveals an Essential Role for Gastric Sulfomucins in Preventing Gastritis Cystica Profunda. J Histochem Cytochem 2019; 67:759-770. [PMID: 31246144 PMCID: PMC6764063 DOI: 10.1369/0022155419860134] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2019] [Accepted: 06/06/2019] [Indexed: 12/04/2022] Open
Abstract
Gastric adenocarcinoma cells secrete sulfomucins, but their role in gastric tumorigenesis remains unclear. To address that question, we generated A4gnt/Chst4 double-knockout (DKO) mice by crossing A4gnt knockout (KO) mice, which spontaneously develop gastric adenocarcinoma, with Chst4 KO mice, which are deficient in the sulfotransferase GlcNAc6ST-2. A4gnt/Chst4 DKO mice lack gastric sulfomucins but developed gastric adenocarcinoma. Unexpectedly, severe gastric erosion occurred in A4gnt/Chst4 DKO mice at as early as 3 weeks of age, and with aging these lesions were accompanied by gastritis cystica profunda (GCP). Cxcl1, Cxcl5, Ccl2, and Cxcr2 transcripts in gastric mucosa of 5-week-old A4gnt/Chst4 DKO mice exhibiting both hyperplasia and severe erosion were significantly upregulated relative to age-matched A4gnt KO mice, which showed hyperplasia alone. However, upregulation of these genes disappeared in 50-week-old A4gnt/Chst4 DKO mice exhibiting high-grade dysplasia/adenocarcinoma and GCP. Moreover, Cxcl1 and Cxcr2 were downregulated in A4gnt/Chst4 DKO mice relative to age-matched A4gnt KO mice exhibiting adenocarcinoma alone. These combined results indicate that the presence of sulfomucins prevents severe gastric erosion followed by GCP in A4gnt KO mice by transiently regulating a set of inflammation-related genes, Cxcl1, Cxcl5, Ccl2, and Cxcr2 at 5 weeks of age, although sulfomucins were not directly associated with gastric cancer development.
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Affiliation(s)
- Masatomo Kawakubo
- Department of Molecular Pathology, Shinshu
University School of Medicine, Shinshu University, Matsumoto, Japan
- Institute for Biomedical Sciences,
Interdisciplinary Cluster for Cutting Edge Research, Shinshu University,
Matsumoto, Japan
| | - Hitomi Komura
- Department of Molecular Pathology, Shinshu
University School of Medicine, Shinshu University, Matsumoto, Japan
| | - Yukinobu Goso
- Department of Biochemistry, Kitasato University
Graduate School of Medical Sciences, Sagamihara, Japan
| | - Motohiro Okumura
- Department of Molecular Pathology, Shinshu
University School of Medicine, Shinshu University, Matsumoto, Japan
| | - Yoshiko Sato
- Department of Molecular Pathology, Shinshu
University School of Medicine, Shinshu University, Matsumoto, Japan
| | - Chifumi Fujii
- Department of Molecular Pathology, Shinshu
University School of Medicine, Shinshu University, Matsumoto, Japan
- Institute for Biomedical Sciences,
Interdisciplinary Cluster for Cutting Edge Research, Shinshu University,
Matsumoto, Japan
| | - Masaki Miyashita
- Department of Molecular Pathology, Shinshu
University School of Medicine, Shinshu University, Matsumoto, Japan
| | - Nobuhiko Arisaka
- Department of Molecular Pathology, Shinshu
University School of Medicine, Shinshu University, Matsumoto, Japan
| | - Satoru Harumiya
- Department of Molecular Pathology, Shinshu
University School of Medicine, Shinshu University, Matsumoto, Japan
| | - Kazuhiro Yamanoi
- Department of Molecular Pathology, Shinshu
University School of Medicine, Shinshu University, Matsumoto, Japan
- Institute for Biomedical Sciences,
Interdisciplinary Cluster for Cutting Edge Research, Shinshu University,
Matsumoto, Japan
| | - Shigenori Yamada
- Division of Gastroenterology, Iiyama Red Cross
Hospital, Iiyama, Japan
| | - Shigeru Kakuta
- Research Center for Human and Environmental
Sciences, Shinshu University, Matsumoto, Japan
- Department of Biomedical Science, Graduate
School of Agricultural and Life Sciences, The University of Tokyo, Tokyo,
Japan
| | - Hiroto Kawashima
- Laboratory of Microbiology and Immunology,
Graduate School of Pharmaceutical Sciences, Chiba University, Chiba,
Japan
| | - Michiko N. Fukuda
- Tumor Microenvironment and Cancer Immunology
Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA,
USA
- Laboratory for Drug Discovery, National
Institute of Advanced Industrial Science and Technology, Tsukuba,
Japan
| | - Minoru Fukuda
- Tumor Microenvironment and Cancer Immunology
Program, Sanford Burnham Prebys Medical Discovery Institute, La Jolla, CA,
USA
| | - Jun Nakayama
- Department of Molecular Pathology, Shinshu
University School of Medicine, Shinshu University, Matsumoto, Japan
- Institute for Biomedical Sciences,
Interdisciplinary Cluster for Cutting Edge Research, Shinshu University,
Matsumoto, Japan
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14
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Krueger CC, Thoms F, Keller E, Leoratti FMS, Vogel M, Bachmann MF. RNA and Toll-Like Receptor 7 License the Generation of Superior Secondary Plasma Cells at Multiple Levels in a B Cell Intrinsic Fashion. Front Immunol 2019; 10:736. [PMID: 31024563 PMCID: PMC6467167 DOI: 10.3389/fimmu.2019.00736] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2018] [Accepted: 03/19/2019] [Indexed: 12/14/2022] Open
Abstract
Secondary plasma cells (PCs) originate from memory B cells and produce increased levels of antibodies with higher affinity compared to PCs generated during primary responses. Here we demonstrate that virus-like particles (VLPs) only induce secondary PCs in the presence of toll-like receptor (TLR) 7 and if they are loaded with RNA. Furthermore, adoptive transfer experiments demonstrate that RNA and TLR7 signaling are required for secondary PC generation, both at the level of memory B cell as well as PC differentiation. TLR7-signaling occurred in a B cell intrinsic manner as TLR7-deficient B cells in an otherwise TLR7-competent environment failed to differentiate into secondary PCs. Therefore, RNA inside VLPs is essential for the generation of memory B cells, which are competent to differentiate to secondary PCs and for the differentiation of secondary PCs themselves. While we have not tested all other TLR or non-TLR adjuvants with our VLPs, these data have obvious implications for vaccine design, as RNA packaged into VLPs is a simple way to enhance induction of memory B cells capable of generating secondary PCs.
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Affiliation(s)
- Caroline C. Krueger
- Department of BioMedical Research, University of Bern, Bern, Switzerland
- Department of Immunology RIA, University Hospital Bern, Bern, Switzerland
| | - Franziska Thoms
- Department of Dermatology, University Hospital Zurich, Schlieren, Switzerland
| | - Elsbeth Keller
- Department of BioMedical Research, University of Bern, Bern, Switzerland
- Department of Immunology RIA, University Hospital Bern, Bern, Switzerland
| | - Fabiana M. S. Leoratti
- Department of BioMedical Research, University of Bern, Bern, Switzerland
- Department of Immunology RIA, University Hospital Bern, Bern, Switzerland
| | - Monique Vogel
- Department of BioMedical Research, University of Bern, Bern, Switzerland
- Department of Immunology RIA, University Hospital Bern, Bern, Switzerland
| | - Martin F. Bachmann
- Department of BioMedical Research, University of Bern, Bern, Switzerland
- Department of Immunology RIA, University Hospital Bern, Bern, Switzerland
- Nuffield Department of Medicine, The Henry Wellcome Building for Molecular Physiology, The Jenner Institute, University of Oxford, Oxford, United Kingdom
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15
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The Aryl Hydrocarbon Receptor Preferentially Marks and Promotes Gut Regulatory T Cells. Cell Rep 2018; 21:2277-2290. [PMID: 29166616 DOI: 10.1016/j.celrep.2017.10.114] [Citation(s) in RCA: 117] [Impact Index Per Article: 19.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 09/20/2017] [Accepted: 10/29/2017] [Indexed: 12/15/2022] Open
Abstract
The local environment may affect the development and function of tissue-resident T regulatory cells (Tregs), which are crucial for controlling inflammation. Although the aryl hydrocarbon receptor (Ahr), an environmental sensor, is expressed by Tregs, its role in Treg cell development and/or function remains elusive. Here, we generated mouse genetic models to ablate or activate Ahr expression specifically in Tregs. We showed that Ahr was expressed more abundantly by peripherally induced Tregs (pTregs) in the gut and that its expression was independent of microbiota. Ahr was important for Treg gut homing and function. Ahr inhibited pro-inflammatory cytokines produced by Tregs but was dispensable for Treg stability. Furthermore, Ahr-expressing Tregs had enhanced in vivo suppressive activity compared with Tregs lacking Ahr expression in a T cell transfer model of colitis. Our data suggest that Ahr signaling in Tregs may be important for gut immune homeostasis.
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16
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McHeyzer-Williams LJ, Dufaud C, McHeyzer-Williams MG. Do Memory B Cells Form Secondary Germinal Centers? Impact of Antibody Class and Quality of Memory T-Cell Help at Recall. Cold Spring Harb Perspect Biol 2018; 10:cshperspect.a028878. [PMID: 28320753 DOI: 10.1101/cshperspect.a028878] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Antigen recall can clearly induce a germinal center (GC) reaction. What has become an issue for debate are the origins of the antigen-specific B cells that form memory-response GCs (mGCs). Using antigen labeling and adoptive transfer, memory B cells expressing different antibody class can give rise to mGCs with differing efficiency. Here, we will argue that the range of class-specific memory responses reported across multiple systems represents the spectrum of memory B-cell fate and function. While the formulation of recall immunogen and location of mGCs have an important role, we propose that effective cognate regulation is the key variable influencing recall outcome. These issues remain central to contemporary efforts of rational vaccine design.
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Affiliation(s)
| | - Chad Dufaud
- The Scripps Research Institute, La Jolla, California 92037
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17
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Pape KA, Jenkins MK. Do Memory B Cells Form Secondary Germinal Centers? It Depends. Cold Spring Harb Perspect Biol 2018; 10:cshperspect.a029116. [PMID: 28320756 DOI: 10.1101/cshperspect.a029116] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
The memory B-cell pool in an immune individual is more heterogeneous than previously recognized. The different types of memory B cells likely play distinct roles in tuning the secondary immune response because they differ in their potential to generate plasmablasts, which secrete antibodies, or germinal center (GC) cells, which generate new and higher affinity memory cells. We propose that the production of plasmablasts or GC cells by a memory B cell is controlled by its state of differentiation and the amount and affinity of antigen-specific antibodies present in the individual in which it resides.
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Affiliation(s)
- Kathryn A Pape
- Center for Immunology, Department of Microbiology and Immunology, University of Minnesota Medical School, Minneapolis, Minnesota 55455
| | - Marc K Jenkins
- Center for Immunology, Department of Microbiology and Immunology, University of Minnesota Medical School, Minneapolis, Minnesota 55455
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18
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Zabel F, Fettelschoss A, Vogel M, Johansen P, Kündig TM, Bachmann MF. Distinct T helper cell dependence of memory B-cell proliferation versus plasma cell differentiation. Immunology 2017; 150:329-342. [PMID: 27861835 DOI: 10.1111/imm.12688] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 11/02/2016] [Accepted: 11/03/2016] [Indexed: 02/03/2023] Open
Abstract
Several memory B-cell subclasses with distinct functions have been described, of which the most effective is the class-switched (CS) memory B-cell population. We have previously shown, using virus-like particles (VLPs), that the proliferative potential of these CS memory B cells is limited and they fail to re-enter germinal centres (GCs). However, VLP-specific memory B cells quickly differentiated into secondary plasma cells (PCs) with the virtue of elevated antibody production compared with primary PCs. Whereas the induction of VLP+ memory B cells was strongly dependent on T helper cells, we were wondering whether re-stimulation of VLP+ memory B cells and their differentiation into secondary PCs would also require T helper cells. Global absence of T helper cells led to strongly impaired memory B cell proliferation and PC differentiation. In contrast, lack of interleukin-21 receptor-dependent follicular T helper cells or CD40 ligand signalling strongly affected proliferation of memory B cells, but differentiation into mature secondary PCs exhibiting increased antibody production was essentially normal. This contrasts with primary B-cell responses, where a strong dependence on CD40 ligand but limited importance of interleukin-21 receptor was seen. Hence, T helper cell dependence differs between primary and secondary B-cell responses as well as between memory B-cell proliferation and PC differentiation.
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Affiliation(s)
- Franziska Zabel
- Department of Dermatology, Zurich University Hospital, Schlieren/Zurich, Switzerland
| | - Antonia Fettelschoss
- Department of Dermatology, Zurich University Hospital, Schlieren/Zurich, Switzerland
| | - Monique Vogel
- Inselspital, Department of Immunology, University of Bern, Bern, Switzerland
| | - Pål Johansen
- Department of Dermatology, Zurich University Hospital, Zurich, Switzerland
| | - Thomas M Kündig
- Department of Dermatology, Zurich University Hospital, Zurich, Switzerland
| | - Martin F Bachmann
- Department of Dermatology, Zurich University Hospital, Schlieren/Zurich, Switzerland.,Inselspital, Department of Immunology, University of Bern, Bern, Switzerland
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19
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Marks E, Ortiz C, Pantazi E, Bailey CS, Lord GM, Waldschmidt TJ, Noelle RJ, Elgueta R. Retinoic Acid Signaling in B Cells Is Required for the Generation of an Effective T-Independent Immune Response. Front Immunol 2016; 7:643. [PMID: 28066447 PMCID: PMC5179524 DOI: 10.3389/fimmu.2016.00643] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2016] [Accepted: 12/13/2016] [Indexed: 12/18/2022] Open
Abstract
Retinoic acid (RA) plays an important role in the balance of inflammation and tolerance in T cells. Furthermore, it has been demonstrated that RA facilitates IgA isotype switching in B cells in vivo. However, it is unclear whether RA has a direct effect on T-independent B cell responses in vivo. To address this question, we generated a mouse model where RA signaling is specifically silenced in the B cell lineage. This was achieved through the overexpression of a dominant negative receptor α for RA (dnRARα) in the B cell lineage. In this model, we found a dramatic reduction in marginal zone (MZ) B cells and accumulation of transitional 2 B cells in the spleen. We also observed a reduction in B1 B cells in the peritoneum with a defect in the T-independent B cell response against 2,4,6-trinitrophenyl. This was not a result of inhibited development of B cells in the bone marrow, but likely the result of both defective expression of S1P1 in MZ B cells and a defect in the development of MZ and B1 B cells. This suggests that RARα expression in B cells is important for B cell frequency in the MZ and peritoneum, which is crucial for the generation of T-independent humoral responses.
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Affiliation(s)
- Ellen Marks
- Department of Mucosal Immunology, Division of Transplantation Immunology & Mucosal Biology, Guy's Hospital, King's College London , London , UK
| | - Carla Ortiz
- Department of Immune Regulation and Intervention, Division of Transplantation Immunology & Mucosal Biology, Guy's Hospital, King's College London , London , UK
| | - Eirini Pantazi
- Department of Immune Regulation and Intervention, Division of Transplantation Immunology & Mucosal Biology, Guy's Hospital, King's College London , London , UK
| | - Charlotte S Bailey
- Department of Immune Regulation and Intervention, Division of Transplantation Immunology & Mucosal Biology, Guy's Hospital, King's College London , London , UK
| | - Graham M Lord
- Department of Mucosal Immunology, Division of Transplantation Immunology & Mucosal Biology, Guy's Hospital, King's College London , London , UK
| | - Thomas J Waldschmidt
- Interdisciplinary Graduate Program in Immunology, Carver College of Medicine, The University of Iowa , Iowa City, IA , USA
| | - Randolph J Noelle
- Department of Immune Regulation and Intervention, Division of Transplantation Immunology & Mucosal Biology, Guy's Hospital, King's College London, London, UK; Department of Microbiology and Immunology of Dartmouth Medical School, Norris Cotton Cancer Center, Lebanon, NH, USA
| | - Raul Elgueta
- Department of Immune Regulation and Intervention, Division of Transplantation Immunology & Mucosal Biology, Guy's Hospital, King's College London , London , UK
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20
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Krishnamurty AT, Thouvenel CD, Portugal S, Keitany GJ, Kim KS, Holder A, Crompton PD, Rawlings DJ, Pepper M. Somatically Hypermutated Plasmodium-Specific IgM(+) Memory B Cells Are Rapid, Plastic, Early Responders upon Malaria Rechallenge. Immunity 2016; 45:402-14. [PMID: 27473412 PMCID: PMC5118370 DOI: 10.1016/j.immuni.2016.06.014] [Citation(s) in RCA: 189] [Impact Index Per Article: 23.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Revised: 04/11/2016] [Accepted: 05/31/2016] [Indexed: 10/31/2022]
Abstract
Humoral immunity consists of pre-existing antibodies expressed by long-lived plasma cells and rapidly reactive memory B cells (MBC). Recent studies of MBC development and function after protein immunization have uncovered significant MBC heterogeneity. To clarify functional roles for distinct MBC subsets during malaria infection, we generated tetramers that identify Plasmodium-specific MBCs in both humans and mice. Long-lived murine Plasmodium-specific MBCs consisted of three populations: somatically hypermutated immunoglobulin M(+) (IgM(+)) and IgG(+) MBC subsets and an unmutated IgD(+) MBC population. Rechallenge experiments revealed that high affinity, somatically hypermutated Plasmodium-specific IgM(+) MBCs proliferated and gave rise to antibody-secreting cells that dominated the early secondary response to parasite rechallenge. IgM(+) MBCs also gave rise to T cell-dependent IgM(+) and IgG(+)B220(+)CD138(+) plasmablasts or T cell-independent B220(-)CD138(+) IgM(+) plasma cells. Thus, even in competition with IgG(+) MBCs, IgM(+) MBCs are rapid, plastic, early responders to a secondary Plasmodium rechallenge and should be targeted by vaccine strategies.
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Affiliation(s)
- Akshay T Krishnamurty
- Department of Immunology, University of Washington School of Medicine, Seattle, WA 98109, USA
| | - Christopher D Thouvenel
- Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, WA 98101, USA
| | - Silvia Portugal
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20892, USA
| | - Gladys J Keitany
- Department of Immunology, University of Washington School of Medicine, Seattle, WA 98109, USA
| | - Karen S Kim
- Department of Immunology, University of Washington School of Medicine, Seattle, WA 98109, USA
| | - Anthony Holder
- The Francis Crick Institute, Mill Hill Laboratory, The Ridgeway, Mill Hill, London NW7 1AA, UK
| | - Peter D Crompton
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Rockville, MD 20892, USA
| | - David J Rawlings
- Department of Immunology, University of Washington School of Medicine, Seattle, WA 98109, USA; Center for Immunity and Immunotherapies, Seattle Children's Research Institute, Seattle, WA 98101, USA
| | - Marion Pepper
- Department of Immunology, University of Washington School of Medicine, Seattle, WA 98109, USA.
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21
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Goodridge HS, Ahmed SS, Curtis N, Kollmann TR, Levy O, Netea MG, Pollard AJ, van Crevel R, Wilson CB. Harnessing the beneficial heterologous effects of vaccination. Nat Rev Immunol 2016; 16:392-400. [PMID: 27157064 PMCID: PMC4931283 DOI: 10.1038/nri.2016.43] [Citation(s) in RCA: 170] [Impact Index Per Article: 21.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Clinical evidence strongly suggests that certain live vaccines, in particular bacille Calmette-Guérin (BCG) and measles vaccines, can reduce all-cause mortality, most probably through protection against non-targeted pathogens in addition to the targeted pathogen. The underlying mechanisms are currently unknown. We discuss how heterologous lymphocyte activation and innate immune memory could promote protection beyond the intended target pathogen and consider how vaccinologists could leverage heterologous immunity to improve outcomes in vulnerable populations, in particular the very young and the elderly.
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Affiliation(s)
- Helen S. Goodridge
- Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, CA 90048, USA.
| | | | - Nigel Curtis
- Department of Paediatrics, The University of Melbourne and Murdoch Children’s Research Institute, Royal Children’s Hospital Melbourne, Parkville, Australia.
| | - Tobias R. Kollmann
- Division of Infectious Disease, Department of Paediatrics, University of British Columbia, CFRI A5-175, 950 W 28th Ave, Vancouver, BC V5Z4H4, Canada.
| | - Ofer Levy
- Precision Vaccines Program, Division of Infectious Diseases, Boston Children’s Hospital and Harvard Medical School, Boston, MA, USA.
| | - Mihai G. Netea
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, The Netherlands.
| | - Andrew J. Pollard
- Oxford Vaccine Group, Department of Paediatrics, University of Oxford and the NIHR Oxford Biomedical Research Centre, Oxford, UK.
| | - Reinout van Crevel
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, PO Box 9101, 6500 HB Nijmegen, The Netherlands.
| | - Christopher B. Wilson
- Global Health Program, Bill and Melinda Gates Foundation, 500 5 Ave N, Seattle, WA 98105, USA.
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22
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Devera TS, Lang GA, Lanis JM, Rampuria P, Gilmore CL, James JA, Ballard JD, Lang ML. Memory B Cells Encode Neutralizing Antibody Specific for Toxin B from the Clostridium difficile Strains VPI 10463 and NAP1/BI/027 but with Superior Neutralization of VPI 10463 Toxin B. Infect Immun 2016; 84:194-204. [PMID: 26502913 PMCID: PMC4693989 DOI: 10.1128/iai.00011-15] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 10/19/2015] [Indexed: 02/07/2023] Open
Abstract
Secreted toxin B (TcdB) substantially contributes to the pathology observed during Clostridium difficile infection. To be successfully incorporated into a vaccine, TcdB-based immunogens must stimulate the production of neutralizing antibody (Ab)-encoding memory B cells (Bmem cells). Despite numerous investigations, a clear analysis of Bmem cellular responses following vaccination against TcdB is lacking. B6 mice were therefore used to test the ability of a nontoxigenic C-terminal domain (CTD) fragment of TcdB to induce Bmem cells that encode TcdB-neutralizing antibody. CTD was produced from the historical VPI 10463 strain (CTD1) and from the hypervirulent strain NAP1/BI/027 (CTD2). It was then demonstrated that CTD1 induced strong recall IgG antibody titers, and this led to the development of functional Bmem cells that could be adoptively transferred to naive recipients. Bmem cell-driven neutralizing Ab responses conferred protection against lethal challenge with TcdB1. Further experiments revealed that an experimental adjuvant (Imject) and a clinical adjuvant (Alhydrogel) were compatible with Bmem cell induction. Reactivity of human Bmem cells to CTD1 was also evident in human peripheral blood mononuclear cells (PBMCs), suggesting that CTD1 could be a good vaccine immunogen. However, CTD2 induced strong Bmem cell-driven antibody titers, and the CTD2 antibody was neutralizing in vitro, but its protection against lethal challenge with TcdB2 was limited to delaying time to death. Therefore, CTD from different C. difficile strains may be a good immunogen for stimulating B cell memory that encodes in vitro neutralizing Ab but may be limited by variable protection against intoxication in vivo.
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Affiliation(s)
- T Scott Devera
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Gillian A Lang
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Jordi M Lanis
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Pragya Rampuria
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Casey L Gilmore
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Judith A James
- Arthritis and Clinical Immunology Research Program, Oklahoma Medical Research Foundation, Oklahoma City, Oklahoma, USA Department of Medicine, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA Oklahoma Clinical and Translational Science Institute, Oklahoma City, Oklahoma, USA
| | - Jimmy D Ballard
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Mark L Lang
- Department of Microbiology and Immunology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
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23
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Acquisition and Longevity of Antibodies to Plasmodium vivax Preerythrocytic Antigens in Western Thailand. CLINICAL AND VACCINE IMMUNOLOGY : CVI 2015; 23:117-24. [PMID: 26656115 PMCID: PMC4744911 DOI: 10.1128/cvi.00501-15] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/25/2015] [Accepted: 11/25/2015] [Indexed: 12/31/2022]
Abstract
Plasmodium vivax is now the dominant Plasmodium species causing malaria in Thailand, yet little is known about naturally acquired immune responses to this parasite in this low-transmission region. The preerythrocytic stage of the P. vivax life cycle is considered an excellent target for a malaria vaccine, and in this study, we assessed the stability of the seropositivity and the magnitude of IgG responses to three different preerythrocytic P. vivax proteins in two groups of adults from a region of western Thailand where malaria is endemic. These individuals were enrolled in a yearlong cohort study, which comprised one group that remained P. vivax free (by quantitative PCR [qPCR] detection, n = 31) and another that experienced two or more blood-stage P. vivax infections during the year of follow up (n = 31). Despite overall low levels of seropositivity, IgG positivity and magnitude were long-lived over the 1-year period in the absence of qPCR-detectable blood-stage P. vivax infections. In contrast, in the adults with two or more P. vivax infections during the year, IgG positivity was maintained, but the magnitude of the response to P. vivax circumsporozoite protein 210 (CSP210) decreased over time. These findings demonstrate that long-term humoral immunity can develop in low-transmission regions.
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Jones DD, Wilmore JR, Allman D. Cellular Dynamics of Memory B Cell Populations: IgM+ and IgG+ Memory B Cells Persist Indefinitely as Quiescent Cells. THE JOURNAL OF IMMUNOLOGY 2015; 195:4753-9. [PMID: 26438523 DOI: 10.4049/jimmunol.1501365] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2015] [Accepted: 09/14/2015] [Indexed: 11/19/2022]
Abstract
Despite their critical role in long-term immunity, the life span of individual memory B cells remains poorly defined. Using a tetracycline-regulated pulse-chase system, we measured population turnover rates and individual t1/2 of pre-established Ag-induced Ig class-switched and IgM-positive memory B cells over 402 d. Our results indicate that, once established, both IgG-positive and less frequent IgM-positive memory populations are exceptionally stable, with little evidence of attrition or cellular turnover. Indeed, the vast majority of cells in both pools exhibited t1/2 that appear to exceed the life span of the mouse, contrasting dramatically with mature naive B cells. These results indicate that recall Ab responses are mediated by stable pools of extremely long-lived cells, and suggest that Ag-experienced B cells employ remarkably efficient survival mechanisms.
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Affiliation(s)
- Derek D Jones
- Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
| | - Joel R Wilmore
- Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
| | - David Allman
- Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104
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25
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McHeyzer-Williams LJ, Milpied PJ, Okitsu SL, McHeyzer-Williams MG. Class-switched memory B cells remodel BCRs within secondary germinal centers. Nat Immunol 2015; 16:296-305. [PMID: 25642821 PMCID: PMC4333102 DOI: 10.1038/ni.3095] [Citation(s) in RCA: 178] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2014] [Accepted: 12/29/2014] [Indexed: 12/14/2022]
Abstract
Effective vaccines induce high-affinity memory B cells and durable antibody responses through accelerated mechanisms of natural selection. Secondary changes in antibody repertoires after vaccine boosts suggest progressive rediversification of B cell receptors (BCRs), but the underlying mechanisms remain unresolved. Here, the integrated specificity and function of individual memory B cell progeny revealed ongoing evolution of polyclonal antibody specificities through germinal center (GC)-specific transcriptional activity. At the clonal and subclonal levels, single-cell expression of the genes encoding the costimulatory molecule CD83 and the DNA polymerase Polη segregated the secondary GC transcriptional program into four stages that regulated divergent mechanisms of memory BCR evolution. Our studies demonstrate that vaccine boosts reactivate a cyclic program of GC function in class-switched memory B cells to remodel existing antibody specificities and enhance durable immunological protection.
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26
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Wienands J, Engels N. The Memory Function of the B Cell Antigen Receptor. Curr Top Microbiol Immunol 2015; 393:107-121. [PMID: 26362935 DOI: 10.1007/82_2015_480] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Activated B lymphocytes preserve their antigen experience by differentiating into long-lived pools of antibody-secreting plasma cells or various types of memory B cells (MBCs). The former population constantly produces serum immunoglobulins with sufficient specificity and affinity to thwart infections with recurrent pathogens. By contrast, memory B cell populations retain their antigen receptors on the cell surface and hence need pathogen-induced differentiation steps before they can actively contribute to host defense. The terminal differentiation of MBCs into antibody-secreting plasma cells is hallmarked by the absence of the lag phase characteristic for primary antibody responses. Moreover, secondary antibody responses are predominantly driven by MBCs that bear an antigen receptor of the IgG class on their surface although IgM-positive memory populations exist as well. These fundamental principles of B cell memory were enigmatic for decades. Only recently, we have begun to understand the underlying mechanisms. This review summarizes our current understanding of how different subpopulations of MBCs are generated during primary immune responses and how their functional heterogeneity on antigen recall is controlled by different signaling capabilities of B cell antigen receptor (BCR) isotypes and by the nature of the antigen.
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Affiliation(s)
- Jürgen Wienands
- Medical Faculty, Institute of Cellular and Molecular Immunology, Georg-August-University of Göttingen, Humboldtallee 34, 37073, Göttingen, Germany.
| | - Niklas Engels
- Medical Faculty, Institute of Cellular and Molecular Immunology, Georg-August-University of Göttingen, Humboldtallee 34, 37073, Göttingen, Germany.
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27
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Elgueta R, Marks E, Nowak E, Menezes S, Benson M, Raman VS, Ortiz C, O'Connell S, Hess H, Lord GM, Noelle R. CCR6-dependent positioning of memory B cells is essential for their ability to mount a recall response to antigen. THE JOURNAL OF IMMUNOLOGY 2014; 194:505-13. [PMID: 25505290 DOI: 10.4049/jimmunol.1401553] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Chemokine-dependent localization of specific B cell subsets within the immune microarchitecture is essential to ensure successful cognate interactions. Although cognate interactions between T cells and memory B cells (B(mem)) are essential for the secondary humoral immune responses, the chemokine response patterns of B(mem) cells are largely unknown. In contrast to naive B cells, this study shows that Ag-specific B(mem) cells have heightened expression of CCR6 and a selective chemotactic response to the CCR6 ligand, CCL20. Although CCR6 appears be nonessential for the initial clonal expansion and maintenance of B(mem), CCR6 is essential for the ability of B(mem) to respond to a recall response to their cognate Ag. This dependency was deemed intrinsic by studies in CCR6-deficient mice and in bone marrow chimeric mice where CCR6 deficiency was limited to the B cell lineage. Finally, the mis-positioning of CCR6-deficient B(mem) was revealed by immunohistological analysis with an altered distribution of CCR6-deficient B(mem) from the marginal and perifollicular to the follicular/germinal center area.
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Affiliation(s)
- Raul Elgueta
- Department of Immune Regulation and Intervention, Division of Transplantation, Immunology, and Mucosal Biology, Guy's Hospital, King's College London, London SE1 9RT, United Kingdom;
| | - Ellen Marks
- Department of Experimental Immunobiology, Division of Transplantation, Immunology and Mucosal Biology, Guy's Hospital, King's College London, London SE1 9RT, United Kingdom
| | - Elizabeth Nowak
- Department of Microbiology and Immunology, Geisel School of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, NH 03766; Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH 03756; and
| | - Shinelle Menezes
- Department of Immune Regulation and Intervention, Division of Transplantation, Immunology, and Mucosal Biology, Guy's Hospital, King's College London, London SE1 9RT, United Kingdom
| | - Micah Benson
- Department of Microbiology and Immunology, Geisel School of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, NH 03766; Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH 03756; and
| | - Vanitha S Raman
- Department of Microbiology and Immunology, Geisel School of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, NH 03766; Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH 03756; and
| | - Carla Ortiz
- Department of Immune Regulation and Intervention, Division of Transplantation, Immunology, and Mucosal Biology, Guy's Hospital, King's College London, London SE1 9RT, United Kingdom
| | - Samuel O'Connell
- Department of Immune Regulation and Intervention, Division of Transplantation, Immunology, and Mucosal Biology, Guy's Hospital, King's College London, London SE1 9RT, United Kingdom
| | | | - Graham M Lord
- Department of Experimental Immunobiology, Division of Transplantation, Immunology and Mucosal Biology, Guy's Hospital, King's College London, London SE1 9RT, United Kingdom
| | - Randolph Noelle
- Department of Immune Regulation and Intervention, Division of Transplantation, Immunology, and Mucosal Biology, Guy's Hospital, King's College London, London SE1 9RT, United Kingdom; Department of Microbiology and Immunology, Geisel School of Medicine, Dartmouth-Hitchcock Medical Center, Lebanon, NH 03766; Norris Cotton Cancer Center, Dartmouth-Hitchcock Medical Center, Lebanon, NH 03756; and
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Lobashevsky AL. Methodological aspects of anti-human leukocyte antigen antibody analysis in solid organ transplantation. World J Transplant 2014; 4:153-67. [PMID: 25346888 PMCID: PMC4208078 DOI: 10.5500/wjt.v4.i3.153] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Revised: 06/16/2014] [Accepted: 07/25/2014] [Indexed: 02/05/2023] Open
Abstract
Donor human leukocyte antigen (HLA)-specific antibodies (DSA) play an important role in solid organ transplantation. Preexisting IgG isotype DSA are considered a risk factor for antibody mediated rejection, graft failure or graft loss. The post-transplant development of DSA depends on multiple factors including immunogenicity of mismatched antigens, HLA class II typing of the recipient, cytokine gene polymorphisms, and cellular immunoregulatory mechanisms. De novo developed antibodies require special attention because not all DSA have equal clinical significance. Therefore, it is important for transplant clinicians and transplant immunologists to accurately characterize DSA. In this review, the contemporary immunological techniques for detection and characterization of anti-HLA antibodies and their pitfalls are described.
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Benson MJ, Rodriguez V, von Schack D, Keegan S, Cook TA, Edmonds J, Benoit S, Seth N, Du S, Messing D, Nickerson-Nutter CL, Dunussi-Joannopoulos K, Rankin AL, Ruzek M, Schnute ME, Douhan J. Modeling the clinical phenotype of BTK inhibition in the mature murine immune system. THE JOURNAL OF IMMUNOLOGY 2014; 193:185-97. [PMID: 24899507 DOI: 10.4049/jimmunol.1302570] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
Inhibitors of Bruton's tyrosine kinase (BTK) possess much promise for the treatment of oncologic and autoimmune indications. However, our current knowledge of the role of BTK in immune competence has been gathered in the context of genetic inactivation of btk in both mice and man. Using the novel BTK inhibitor PF-303, we model the clinical phenotype of BTK inhibition by systematically examining the impact of PF-303 on the mature immune system in mice. We implicate BTK in tonic BCR signaling, demonstrate dependence of the T3 B cell subset and IgM surface expression on BTK activity, and find that B1 cells survive and function independently of BTK. Although BTK inhibition does not impact humoral memory survival, Ag-driven clonal expansion of memory B cells and Ab-secreting cell generation are inhibited. These data define the role of BTK in the mature immune system and mechanistically predict the clinical phenotype of chronic BTK inhibition.
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Affiliation(s)
- Micah J Benson
- Biotherapeutics Immunoscience, Pfizer Inc., Cambridge, MA 02140;
| | | | - David von Schack
- Biotherapeutics Clinical Research and Development, Pfizer Inc., Cambridge, MA 02140
| | - Sean Keegan
- Biotherapeutics Immunoscience, Pfizer Inc., Cambridge, MA 02140
| | - Tim A Cook
- Biotherapeutics Immunoscience, Pfizer Inc., Cambridge, MA 02140
| | - Jason Edmonds
- Biotherapeutics Immunoscience, Pfizer Inc., Cambridge, MA 02140
| | - Stephen Benoit
- Biotherapeutics Immunoscience, Pfizer Inc., Cambridge, MA 02140
| | - Nilufer Seth
- Biotherapeutics Immunoscience, Pfizer Inc., Cambridge, MA 02140
| | - Sarah Du
- Biotherapeutics Clinical Research and Development, Pfizer Inc., Cambridge, MA 02140
| | - Dean Messing
- Biotherapeutics Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Cambridge, MA 02140; and
| | | | | | - Andrew L Rankin
- Biotherapeutics Immunoscience, Pfizer Inc., Cambridge, MA 02140
| | - Melanie Ruzek
- Biotherapeutics Immunoscience, Pfizer Inc., Cambridge, MA 02140
| | - Mark E Schnute
- Biotherapeutics Medicinal Chemistry, Pfizer Inc., Cambridge, MA 02140
| | - John Douhan
- Biotherapeutics Immunoscience, Pfizer Inc., Cambridge, MA 02140
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30
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Xu Y, Xu L, Zhao M, Xu C, Fan Y, Pierce SK, Liu W. No receptor stands alone: IgG B-cell receptor intrinsic and extrinsic mechanisms contribute to antibody memory. Cell Res 2014; 24:651-64. [PMID: 24839903 PMCID: PMC4042179 DOI: 10.1038/cr.2014.65] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Acquired immunological memory is a striking phenomenon. A lethal epidemic sweeps through a naïve population, many die but those who survive are never "attacked twice - never at least fatally", as the historian Thucydides observed in 430 BCE. Antibody memory is critical for protection against many human infectious diseases and is the basis for nearly all current human vaccines. Antibody memory is encoded, in part, in isotype-switched immunoglobulin (Ig)G-expressing memory B cells that are generated in the primary response to antigen and give rise to rapid, high-affinity and high-titered antibody responses upon challenge with the same antigen. How IgG-B-cell receptors (BCRs) and antigen-induced IgG-BCR signaling contribute to memory antibody responses are not fully understood. In this review, we summarize exciting new advances that are revealing the cellular and molecular mechanisms at play in antibody memory and discuss how studies using different experimental approaches will help elucidate the complex phenomenon of B-cell memory.
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Affiliation(s)
- Yinsheng Xu
- MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University, Beijing 100084, China
| | - Liling Xu
- MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Meng Zhao
- MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - ChenGuang Xu
- MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Yilin Fan
- MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China
| | - Susan K Pierce
- Laboratory of Immunogenetics, National Institute of Allergy and Infectious Diseases, NIH, Rockville, MD 20852, USA
| | - Wanli Liu
- MOE Key Laboratory of Protein Science, School of Life Sciences, Tsinghua University, Beijing 100084, China
- Collaborative Innovation Center for Diagnosis and Treatment of Infectious Diseases, Tsinghua University, Beijing 100084, China
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31
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Zabel F, Mohanan D, Bessa J, Link A, Fettelschoss A, Saudan P, Kündig TM, Bachmann MF. Viral Particles Drive Rapid Differentiation of Memory B Cells into Secondary Plasma Cells Producing Increased Levels of Antibodies. THE JOURNAL OF IMMUNOLOGY 2014; 192:5499-508. [DOI: 10.4049/jimmunol.1400065] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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32
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Ng DHL, Skehel JJ, Kassiotis G, Langhorne J. Recovery of an antiviral antibody response following attrition caused by unrelated infection. PLoS Pathog 2014; 10:e1003843. [PMID: 24391499 PMCID: PMC3879355 DOI: 10.1371/journal.ppat.1003843] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Accepted: 11/05/2013] [Indexed: 01/28/2023] Open
Abstract
The homeostatic mechanisms that regulate the maintenance of immunological memory to the multiple pathogen encounters over time are unknown. We found that a single malaria episode caused significant dysregulation of pre-established Influenza A virus-specific long-lived plasma cells (LLPCs) resulting in the loss of Influenza A virus-specific Abs and increased susceptibility to Influenza A virus re-infection. This loss of LLPCs involved an FcγRIIB-dependent mechanism, leading to their apoptosis. However, given enough time following malaria, the LLPC pool and humoral immunity to Influenza A virus were eventually restored. Supporting a role for continuous conversion of Influenza A virus-specific B into LLPCs in the restoration of Influenza A virus immunity, B cell depletion experiments also demonstrated a similar requirement for the long-term maintenance of serum Influenza A virus-specific Abs in an intact LLPC compartment. These findings show that, in addition to their established role in the anamnestic response to reinfection, the B cell pool continues to be a major contributor to the maintenance of long-term humoral immunity following primary Influenza A virus infection, and to the recovery from attrition following heterologous infection. These data have implications for understanding the longevity of protective efficacy of vaccinations in countries where continuous infections are endemic. Antibody responses to infectious pathogens are critical in host survival, recovery and protection from reinfection; they also correlate with the success of vaccination. It is currently thought that antibody serum titers are maintained at protective levels over long periods of time by specialized long-lived antibody-secreting plasma cells residing in the bone marrow. Indeed, antibodies against the original virus can still be found in survivors of the 1918 Spanish Flu, more than 90 years ago. However, it is also becoming clear that subsequent infection with heterologous pathogens may cause attrition of previously established immunological memory, in order to accommodate new lymphocyte specificities in the finite space of the host. This phenomenon is seemingly at odds with long-term maintenance of immunological memory. We also show that a single episode of malaria, caused by infection by Plasmodium chabaudi, leads to the loss of preexisting plasma cells, serum antibodies and protective immunity against Influenza A virus. However, Influenza A virus-specific immunity does eventually recover in these animals with the replenishment of plasma cells by B cells over the course of several weeks. Thus, the reported mechanism reconciles attrition of immunological memory by heterologous infection and long-term stability, and places B cells, instead of their descendant plasma cells, at the center of humoral memory.
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Affiliation(s)
- Dorothy H. L. Ng
- Division of Immunoregulation, MRC National Institute for Medical Research, London, United Kingdom
- Division of Parasitology, MRC National Institute for Medical Research, London, United Kingdom
| | - John J. Skehel
- Division of Virology, MRC National Institute for Medical Research, London, United Kingdom
| | - George Kassiotis
- Division of Immunoregulation, MRC National Institute for Medical Research, London, United Kingdom
- * E-mail: (GK); (JL)
| | - Jean Langhorne
- Division of Parasitology, MRC National Institute for Medical Research, London, United Kingdom
- * E-mail: (GK); (JL)
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33
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Clarke ET, Williams NA, Findlow J, Borrow R, Heyderman RS, Finn A. Polysaccharide-specific memory B cells generated by conjugate vaccines in humans conform to the CD27+IgG+ isotype-switched memory B Cell phenotype and require contact-dependent signals from bystander T cells activated by bacterial proteins to differentiate into plasma cells. THE JOURNAL OF IMMUNOLOGY 2013; 191:6071-83. [PMID: 24227777 DOI: 10.4049/jimmunol.1203254] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
The polysaccharides (PS) surrounding encapsulated bacteria are generally unable to activate T cells and hence do not induce B cell memory (BMEM). PS conjugate vaccines recruit CD4(+) T cells via a carrier protein, such as tetanus toxoid (TT), resulting in the induction of PS-specific BMEM. However, the requirement for T cells in the subsequent activation of the BMEM at the time of bacterial encounter is poorly understood, despite having critical implications for protection. We demonstrate that the PS-specific BMEM induced in humans by a meningococcal serogroup C PS (Men C)-TT conjugate vaccine conform to the isotype-switched (IgG(+)CD27(+)) rather than the IgM memory (IgM(+)CD27(+)) phenotype. Both Men C and TT-specific BMEM require CD4(+) T cells to differentiate into plasma cells. However, noncognate bystander T cells provide such signals to PS-specific BMEM with comparable effect to the cognate T cells available to TT-specific BMEM. The interaction between the two populations is contact-dependent and is mediated in part through CD40. Meningococci drive the differentiation of the Men C-specific BMEM through the activation of bystander T cells by bacterial proteins, although these signals are enhanced by T cell-independent innate signals. An effect of the TT-specific T cells activated by the vaccine on unrelated BMEM in vivo is also demonstrated. These data highlight that any protection conferred by PS-specific BMEM at the time of bacterial encounter will depend on the effectiveness with which bacterial proteins are able to activate bystander T cells. Priming for T cell memory against bacterial proteins through their inclusion in vaccine preparations must continue to be pursued.
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Affiliation(s)
- Edward T Clarke
- School of Cellular and Molecular Medicine, University of Bristol, Bristol BS8 1TD, United Kingdom
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Tarlinton D, Good-Jacobson K. Diversity among memory B cells: origin, consequences, and utility. Science 2013; 341:1205-11. [PMID: 24031013 DOI: 10.1126/science.1241146] [Citation(s) in RCA: 151] [Impact Index Per Article: 13.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Immunological memory is the residuum of a successful immune response that in the B cell lineage comprises long-lived plasma cells and long-lived memory B cells. It is apparent that distinct classes of memory B cells exist, distinguishable by, among other things, immunoglobulin isotype, location, and passage through the germinal center. Some of this variation is due to the nature of the antigen, and some appears to be inherent to the process of forming memory. Here, we consider the heterogeneity in development and phenotype of memory B cells and whether particular functions are partitioned into distinct subsets. We consider also how understanding the details of generating memory may provide opportunities to develop better, functionally targeted vaccines.
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Affiliation(s)
- David Tarlinton
- The Walter and Eliza Hall Institute of Medical Research, Parkville, Victoria, Australia.
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35
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Bortnick A, Allman D. What is and what should always have been: long-lived plasma cells induced by T cell-independent antigens. THE JOURNAL OF IMMUNOLOGY 2013; 190:5913-8. [PMID: 23749966 DOI: 10.4049/jimmunol.1300161] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
It is well accepted that Ag-induced B cell differentiation often results in the generation of exceptionally long-lived plasma cells. Much of the work supporting this viewpoint stems from studies focused on germinal center-derived plasma cells secreting high-affinity isotype-switched Abs in mice immunized with T cell-dependent Ags. In contrast, less attention has been devoted to understanding Ab responses to T cell-independent Ags and pathogens. In this study, we review recent work showing that T cell-independent Ags consisting of either polysaccharides or LPSs also induce the formation of long-lived plasma cells, despite their general inability to sustain germinal center responses. This new information provides a framework for more fully understanding the forces underlying immunity to pathogens that resist T cell recognition and the extracellular cues governing plasma cell longevity.
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Affiliation(s)
- Alexandra Bortnick
- Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
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36
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Slocombe T, Brown S, Miles K, Gray M, Barr TA, Gray D. Plasma cell homeostasis: the effects of chronic antigen stimulation and inflammation. THE JOURNAL OF IMMUNOLOGY 2013; 191:3128-38. [PMID: 23935195 DOI: 10.4049/jimmunol.1301163] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Long-lived plasma cells (LLPCs) that maintain humoral immunity to previously encountered Ags occupy a compartment in the bone marrow (BM). The rules and mechanisms by which cells enter (and leave) this compartment are poorly understood. We looked at what happens to the LLPC compartment and to plasma cell lifespan in general, in situations in which Ag stimulation and/or inflammation persist. We find that chronic Ag supply causes the generation of short-lived plasma cells in the local lymphoid organ, at the expense of any LLPC production. Furthermore, we find that inflammation caused by infection (mediated via TNF-α) causes a dramatic mobilization of LLPCs from the BM, with a concomitant reduction in circulating Ab levels against previously immunized Ags. These data are discussed in the context of the capacity of the BM LLPC compartment and competition for entry to it.
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Affiliation(s)
- Tom Slocombe
- Institute of Immunology and Infection Research, School of Biological Sciences, University of Edinburgh, Edinburgh EH9 3JT, United Kingdom
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37
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Kometani K, Nakagawa R, Shinnakasu R, Kaji T, Rybouchkin A, Moriyama S, Furukawa K, Koseki H, Takemori T, Kurosaki T. Repression of the Transcription Factor Bach2 Contributes to Predisposition of IgG1 Memory B Cells toward Plasma Cell Differentiation. Immunity 2013; 39:136-47. [DOI: 10.1016/j.immuni.2013.06.011] [Citation(s) in RCA: 152] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2012] [Accepted: 04/15/2013] [Indexed: 12/20/2022]
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38
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Weill JC, Le Gallou S, Hao Y, Reynaud CA. Multiple players in mouse B cell memory. Curr Opin Immunol 2013; 25:334-8. [DOI: 10.1016/j.coi.2013.05.004] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2013] [Revised: 05/02/2013] [Accepted: 05/04/2013] [Indexed: 12/14/2022]
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Capolunghi F, Rosado MM, Sinibaldi M, Aranburu A, Carsetti R. Why do we need IgM memory B cells? Immunol Lett 2013; 152:114-20. [PMID: 23660557 DOI: 10.1016/j.imlet.2013.04.007] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2013] [Revised: 04/24/2013] [Accepted: 04/26/2013] [Indexed: 12/22/2022]
Abstract
Immunological memory is our reservoir of ready-to-use antibodies and memory B cells. Because of immunological memory a secondary infection will be very light or not occur at all. Antibodies and cells, generated in the germinal center in response to the first encounter with antigen, are highly specific, remain in the organism virtually forever and are mostly of IgG isotype. Long lived plasma cells homing to the bone marrow ensure the constant production of protective antibodies, whereas switched memory B cells proliferate and differentiate in response to secondary challenge. IgM memory B cells represent our first-line defense against infections. They are generated by a T-cell independent mechanism probably triggered by Toll-like receptor-9. They produce natural antibodies with anti-bacterial specificity and the spleen is indispensable for their maintenance. We will review the characteristics and functions of IgM memory B cells that explain their importance in the immediate protection from pathogens. IgM memory B cells, similar to mouse B-1a B cells, may be a remnant of a primitive immune system that developed in the spleen of cartilaginous fish and persisted throughout evolution notwithstanding the sophisticated tools of the adaptive immune system.
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Affiliation(s)
- Federica Capolunghi
- Department of Laboratories, Children Hospital Bambino Gesù (IRCCS), Piazza S.Onofrio 4, 00165 Rome, Italy
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40
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Fernandez L, Salinas GF, Rocha C, Carvalho-Pinto CE, Yeremenko N, Papon L, Medema JP, Combe B, Morel J, Baeten D, Hahne M. The TNF family member APRIL dampens collagen-induced arthritis. Ann Rheum Dis 2012. [DOI: 10.1136/annrheumdis-2012-202382] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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41
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Taylor JJ, Jenkins MK, Pape KA. Heterogeneity in the differentiation and function of memory B cells. Trends Immunol 2012; 33:590-7. [PMID: 22920843 DOI: 10.1016/j.it.2012.07.005] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2012] [Revised: 07/17/2012] [Accepted: 07/19/2012] [Indexed: 10/28/2022]
Abstract
Vaccines that induce neutralizing antibodies have led to the eradication of small pox and have severely reduced the prevalence of many other infections. However, even the most successful vaccines do not induce protective antibodies in all individuals, and can fail to induce lifelong immunity. A key to remedying these shortcomings may lie in a better understanding of long-lived memory B cells. Recent studies have revealed novel insights into the differentiation and function of these cells, and have shown that the memory B cell pool is much more heterogeneous than previously appreciated.
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Affiliation(s)
- Justin J Taylor
- Department of Microbiology, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN 55455, USA
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42
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Impact of infection or vaccination on pre-existing serological memory. Hum Immunol 2012; 73:1082-6. [PMID: 22902392 DOI: 10.1016/j.humimm.2012.07.328] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2012] [Revised: 04/27/2012] [Accepted: 07/13/2012] [Indexed: 12/20/2022]
Abstract
Once established, serum antibody responses against a specific pathogen may last a lifetime. We describe a cohort of four subjects who received smallpox vaccination, and a single subject who received multiple vaccinations, with antibody levels to unrelated antigens monitored for 1-3 years. These immunizations provided the opportunity to determine if infection/vaccination and the resulting toll-like receptor stimulation would alter antigen-specific serological memory to other antigens, including bacterial toxins (tetanus, diphtheria, and pertussis) and viruses (yellow fever virus, measles, mumps, rubella, Epstein-Barr virus, and varicella-zoster virus). Our results indicate that serum IgG levels are remarkably stable and infection or vaccination are unlikely to increase or decrease pre-existing antigen-specific antibody responses.
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43
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Reynaud CA, Descatoire M, Dogan I, Huetz F, Weller S, Weill JC. IgM memory B cells: a mouse/human paradox. Cell Mol Life Sci 2012; 69:1625-34. [PMID: 22481437 PMCID: PMC3337997 DOI: 10.1007/s00018-012-0971-z] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2012] [Revised: 03/13/2012] [Accepted: 03/13/2012] [Indexed: 11/14/2022]
Abstract
Humoral memory is maintained by two types of persistent cells, memory B cells and plasma cells, which have different phenotypes and functions. Long-lived plasma cells can survive for a lifespan within a complex niche in the bone marrow and provide continuous protective serum antibody levels. Memory B cells reside in secondary lymphoid organs, where they can be rapidly mobilized upon a new antigenic encounter. Surface IgG has long been taken as a surrogate marker for memory in the mouse. Recently, however, we have brought evidence for a long-lived IgM memory B cell population in the mouse, while we have also argued that, in humans, these same cells are not classical memory B cells but marginal zone (MZ) B cells which, as opposed to their mouse MZ counterpart, recirculate and carry a mutated B cell receptor. In this review, we will discuss these apparently paradoxical results.
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Affiliation(s)
- Claude-Agnès Reynaud
- Faculté de Médecine, Site Necker-Enfants Malades, INSERM U783 “Développement du système immunitaire”, Université Paris Descartes, 156 rue de Vaugirard, 75730 Paris Cedex 15, France
| | - Marc Descatoire
- Faculté de Médecine, Site Necker-Enfants Malades, INSERM U783 “Développement du système immunitaire”, Université Paris Descartes, 156 rue de Vaugirard, 75730 Paris Cedex 15, France
| | - Ismail Dogan
- Faculté de Médecine, Site Necker-Enfants Malades, INSERM U783 “Développement du système immunitaire”, Université Paris Descartes, 156 rue de Vaugirard, 75730 Paris Cedex 15, France
| | - François Huetz
- Faculté de Médecine, Site Necker-Enfants Malades, INSERM U783 “Développement du système immunitaire”, Université Paris Descartes, 156 rue de Vaugirard, 75730 Paris Cedex 15, France
- Unité de Biologie des Populations Lymphocytaires, CNRS URA 1961, Institut Pasteur, 25 rue du Docteur Roux, 75724 Paris Cedex 15, France
| | - Sandra Weller
- Faculté de Médecine, Site Necker-Enfants Malades, INSERM U783 “Développement du système immunitaire”, Université Paris Descartes, 156 rue de Vaugirard, 75730 Paris Cedex 15, France
| | - Jean-Claude Weill
- Faculté de Médecine, Site Necker-Enfants Malades, INSERM U783 “Développement du système immunitaire”, Université Paris Descartes, 156 rue de Vaugirard, 75730 Paris Cedex 15, France
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44
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Taylor JJ, Pape KA, Jenkins MK. A germinal center-independent pathway generates unswitched memory B cells early in the primary response. ACTA ACUST UNITED AC 2012; 209:597-606. [PMID: 22370719 PMCID: PMC3302224 DOI: 10.1084/jem.20111696] [Citation(s) in RCA: 285] [Impact Index Per Article: 23.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Memory B cells can be produced from the classical germinal center (GC) pathway or a less understood GC-independent route. We used antigen-based cell enrichment to assess the relative contributions of these pathways to the polyclonal memory B cell pool. We identified a CD38(+) GL7(+) B cell precursor population that differentiated directly into IgM(+) or isotype-switched (sw) Ig(+) memory B cells in a GC-independent fashion in response to strong CD40 stimulation. Alternatively, CD38(+) GL7(+) B cell precursors had the potential to become Bcl-6(+) GC cells that then generated primarily swIg(+) memory B cells. These results demonstrate that early IgM(+) and swIg(+) memory B cells are products of a GC-independent pathway, whereas later switched Ig(+) memory B cells are products of GC cells.
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Affiliation(s)
- Justin J Taylor
- Department of Microbiology, Center for Immunology, University of Minnesota Medical School, Minneapolis, MN 55455, USA.
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45
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de Geus ED, Rebel JMJ, Vervelde L. Kinetics of the avian influenza-specific humoral responses in lung are indicative of local antibody production. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2012; 36:317-322. [PMID: 21663761 DOI: 10.1016/j.dci.2011.05.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2011] [Revised: 05/09/2011] [Accepted: 05/09/2011] [Indexed: 05/30/2023]
Abstract
The role and kinetics of respiratory immunoglobulins in AIV infection has not been investigated. In this study we determined the numbers of both total antibody secreting cells (ASC) and virus-specific ASC in lung, spleen, blood and bone marrow (BM) following low-pathogenic AIV infection. Antiviral humoral immune responses were induced both locally in the lung and systemically in the spleen. Responses in the lung and BM preceded responses in the spleen and in blood, with virus-specific IgY ASC already detected in lung and BM from 1 week post-primary inoculation, indicating that respiratory immune responses are not induced in the spleen, but locally in the lung. ASC present in the blood of the lungs and co-isolated during lymphocyte isolation from the lungs have no major impact on the ASC detected in the lungs based on statistical correlation.
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Affiliation(s)
- Eveline D de Geus
- Department of Infectious Diseases and Immunology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
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46
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Kinetics of humoral and memory B cell response induced by the Plasmodium falciparum 19-kilodalton merozoite surface protein 1 in mice. Infect Immun 2011; 80:633-42. [PMID: 22104109 DOI: 10.1128/iai.05188-11] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The 19-kDa carboxyl-terminal fragment of the merozoite surface protein-1 (MSP-1(19)) has been shown to regulate antibody (Ab)-mediated protective immunity to blood-stage malaria infection. But the serological memory to this antigen tends to be short-lived, and little is known of the mechanisms that regulate the formation of B cell memory to MSP-1(19) antigen. We studied the formation of B cell memory response after immunization with the recombinant 19-kDa Plasmodium falciparum merozoite surface protein 1 (PfMSP-1(19)). Immunization with PfMSP-1(19) resulted in delayed increase in germinal center (GC) B cell numbers. This poor GC reaction correlated with short-lived PfMSP-1(19)-specific antibodies in serum and the short life of PfMSP-1(19)-specific plasma cells and memory B cells (MBCs) in spleen and bone marrow. PfMSP-1(19)-specific MBCs were capable of producing antigen (Ag)-specific Ab-secreting cell (ASC) responses that were short-lived following challenge immunization of the immune mice with antigen or transgenic Plasmodium berghei parasite expressing PfMSP-1(19) in place of native P. berghei MSP-1(19) at 8 weeks after the last immunization or following adoptive transfer into naive hosts. However, no protection was achieved in PfMSP-1(19) immune mice or recipient mice with PfMSP-1(19)-specific MBCs following challenge with transgenic P. berghei. Our findings suggest that PfMSP-1(19)-specific IgG production by short-lived plasma cells combined with the poor ability of the PfMSP-1(19)-induced MBCs to maintain the anamnestic IgG responses failed to contribute to protection against infection.
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47
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Nojima T, Haniuda K, Moutai T, Matsudaira M, Mizokawa S, Shiratori I, Azuma T, Kitamura D. In-vitro derived germinal centre B cells differentially generate memory B or plasma cells in vivo. Nat Commun 2011; 2:465. [PMID: 21897376 DOI: 10.1038/ncomms1475] [Citation(s) in RCA: 214] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2011] [Accepted: 08/10/2011] [Indexed: 01/24/2023] Open
Abstract
In response to T cell-dependent antigens, B cells proliferate extensively to form germinal centres (GC), and then differentiate into memory B (B(mem)) cells or long-lived plasma cells (LLPCs) by largely unknown mechanisms. Here we show a new culture system in which mouse naïve B cells undergo massive expansion and isotype switching, and generate GC-phenotype B (iGB) cells. The iGB cells expressing IgG1 or IgM/D, but not IgE, differentiate into B(mem) cells in vivo after adoptive transfer and can elicit rapid immune responses with the help of cognate T cells. Secondary culture with IL-21 maintains the proliferation of the iGB cells, while shifting their in vivo developmental fate from B(mem) cells to LLPCs, an outcome that can be reversed by withdrawal of IL-21 in tertiary cultures. Thus, this system enables in vitro manipulation of B-cell fate, into either B(mem) cells or LLPCs, and will facilitate dissection of GC-B cell differentiation programs.
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Affiliation(s)
- Takuya Nojima
- Division of Molecular Biology, Research Institute for Biological Sciences (RIBS), Tokyo University of Science, Noda, Chiba 278-0022, Japan.
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48
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Alexander CM, Tygrett LT, Boyden AW, Wolniak KL, Legge KL, Waldschmidt TJ. T regulatory cells participate in the control of germinal centre reactions. Immunology 2011; 133:452-68. [PMID: 21635248 DOI: 10.1111/j.1365-2567.2011.03456.x] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Germinal centre (GC) reactions are central features of T-cell-driven B-cell responses, and the site where antibody-producing cells and memory B cells are generated. Within GCs, a range of complex cellular and molecular events occur which are critical for the generation of high affinity antibodies. These processes require exquisite regulation not only to ensure the production of desired antibodies, but to minimize unwanted autoreactive or low affinity antibodies. To assess whether T regulatory (Treg) cells participate in the control of GC responses, immunized mice were treated with an anti-glucocorticoid-induced tumour necrosis factor receptor-related protein (GITR) monoclonal antibody (mAb) to disrupt Treg-cell activity. In anti-GITR-treated mice, the GC B-cell pool was significantly larger compared with control-treated animals, with switched GC B cells composing an abnormally high proportion of the response. Dysregulated GCs were also observed regardless of strain, T helper type 1 or 2 polarizing antigens, and were also seen after anti-CD25 mAb treatment. Within the spleens of immunized mice, CXCR5(+) and CCR7(-) Treg cells were documented by flow cytometry and Foxp3(+) cells were found within GCs using immunohistology. Final studies demonstrated administration of either anti-transforming growth factor-β or anti-interleukin-10 receptor blocking mAb to likewise result in dysregulated GCs, suggesting that generation of inducible Treg cells is important in controlling the GC response. Taken together, these findings indicate that Treg cells contribute to the overall size and quality of the humoral response by controlling homeostasis within GCs.
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Affiliation(s)
- Carla-Maria Alexander
- Department of Pathology, University of Iowa Roy J. and Lucille A. Carver College of Medicine, Iowa City, IA 52242, USA
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49
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Haniuda K, Nojima T, Ohyama K, Kitamura D. Tolerance induction of IgG+ memory B cells by T cell-independent type II antigens. THE JOURNAL OF IMMUNOLOGY 2011; 186:5620-8. [PMID: 21490159 DOI: 10.4049/jimmunol.1100213] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Memory B cells generated during a T cell-dependent immune response rapidly respond to a secondary immunization by producing abundant IgG Abs that bind cognate Ag with high affinity. It is currently unclear whether this heightened recall response by memory B cells is due to augmented IgG-BCR signaling, which has only been demonstrated in the context of naive transgenic B cells. To address this question, we examined whether memory B cells can respond in vivo to Ags that stimulate only through BCR, namely T cell-independent type II (TI-II) Ags. In this study, we show that the TI-II Ag (4-hydroxy-3-nitrophenyl) acetyl (NP)-Ficoll cannot elicit the recall response in mice first immunized with the T cell-dependent Ag NP-chicken γ-globulin. Moreover, the NP-Ficoll challenge in vivo as well as in vitro significantly inhibits a subsequent recall response to NP-chicken γ-globulin in a B cell-intrinsic manner. This NP-Ficoll-mediated tolerance is caused by the preferential elimination of IgG(+) memory B cells binding to NP with high affinity. These data indicate that BCR cross-linking with a TI-II Ag does not activate IgG(+) memory B cells, but rather tolerizes them, identifying a terminal checkpoint of memory B cell differentiation that may prevent autoimmunity.
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Affiliation(s)
- Kei Haniuda
- Division of Molecular Biology, Research Institute for Biological Sciences, Tokyo University of Science, Noda, Chiba 278-0022, Japan
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50
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Nishimura M, Murakami A, Hara Y, Azuma T. Characterization of memory B cells responsible for affinity maturation of anti- (4-hydroxy-3-nitrophenyl)acetyl (NP) antibodies. Int Immunol 2011; 23:271-85. [PMID: 21421736 DOI: 10.1093/intimm/dxr002] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023] Open
Abstract
We searched for memory B cells responsible for high-affinity anti-(4-hydroxy-3-nitrophenyl)acetyl (NP) antibody production by C57BL/6 mice immunized with NP-chicken γ-globulin (CGG), using flow cytometry. We first prepared transfectants expressing B-cell antigen receptor (BCR) of known affinity as a memory B-cell model as well as NP-allophycocyanin (APC) of different NP valences, NP(lo), NP(med) and NP(hi). We then used the latter as probes capable of distinguishing BCR affinities: NP(lo)-APC bound to BCRs with an affinity higher than 3.4 × 10(6) M(-1), while NP(med)-APC bound to those with a higher than germline affinity. B cells capable of binding to NP(lo)-APC appeared in spleens on day 14 post-immunization, and harbored Tyr95 (Tyr95 type) as well as a mutation from Trp33 to Leu. B cells with BCRs harboring Gly95 (Gly95 type) appeared only in the NP(med)-APC-binding fraction on day 56 and in the NP(lo)-APC-binding fraction on day 77, indicating that this long duration was necessary for Gly95 type B cells to acquire high affinity and to become a member of the group of memory B cells with high affinity. Administration of NP-CGG on day 77 caused little change in the proportion of the Gly95 type in NP(lo)-APC-binding B cells in the following 2 weeks but brought about an increase in the number of high-affinity antibody-secreting cells (ASC), suggesting that the memory B-cell compartment established was maintained at a later stage and supplied high-affinity ASCs. The relationship between these Gly95 type memory B cells and ASCs is discussed.
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Affiliation(s)
- Miyuki Nishimura
- Research Institute for Biological Sciences, Tokyo University of Science, 2669 Yamazaki, Noda, Chiba 278-0022, Japan
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