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Yu Y, Lu C, Yu W, Lei Y, Sun S, Liu P, Bai F, Chen Y, Chen J. B Cells Dynamic in Aging and the Implications of Nutritional Regulation. Nutrients 2024; 16:487. [PMID: 38398810 PMCID: PMC10893126 DOI: 10.3390/nu16040487] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2024] [Revised: 02/01/2024] [Accepted: 02/06/2024] [Indexed: 02/25/2024] Open
Abstract
Aging negatively affects B cell production, resulting in a decrease in B-1 and B-2 cells and impaired antibody responses. Age-related B cell subsets contribute to inflammation. Investigating age-related alterations in the B-cell pool and developing targeted therapies are crucial for combating autoimmune diseases in the elderly. Additionally, optimal nutrition, including carbohydrates, amino acids, vitamins, and especially lipids, play a vital role in supporting immune function and mitigating the age-related decline in B cell activity. Research on the influence of lipids on B cells shows promise for improving autoimmune diseases. Understanding the aging B-cell pool and considering nutritional interventions can inform strategies for promoting healthy aging and reducing the age-related disease burden.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Juan Chen
- Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing 100091, China; (Y.Y.)
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2
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Frentzel S, Jeron A, Pausder A, Kershaw O, Volckmar J, Schmitz I, Bruder D. IκB NS-deficiency protects mice from fatal Listeria monocytogenes infection by blunting pro-inflammatory signature in Ly6C high monocytes and preventing exaggerated innate immune responses. Front Immunol 2022; 13:1028789. [PMID: 36618344 PMCID: PMC9813228 DOI: 10.3389/fimmu.2022.1028789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Accepted: 11/28/2022] [Indexed: 12/24/2022] Open
Abstract
IκB proteins regulate the inhibition and activation of NF-κB transcription factor complexes. While classical IκB proteins keep NF-κB complexes inactive in the cytoplasm, atypical IκB proteins act on activated NF-κB complexes located in the nucleus. Most of the knowledge regarding the function of IκB proteins has been collected in vitro, while far less is known regarding their impact on activation and regulation of immune responses during in vivo infections. Combining in vivo Listeria monocytogenes (Lm) infection with comparative ex vivo transcriptional profiling of the hepatic response to the pathogen we observed that in contrast to wild type mice that mounted a robust inflammatory response, IκBNS-deficiency was generally associated with a transcriptional repression of innate immune responses. Whole tissue transcriptomics revealed a pronounced IκBNS-dependent reduction of myeloid cell-associated transcripts in the liver together with an exceptionally high Nfkbid promoter activity uncovered in Ly6Chigh inflammatory monocytes prompted us to further characterize the specific contribution of IκBNS in the inflammatory response of monocytes to the infectious agent. Indeed, Ly6Chigh monocytes primed during Lm infection in the absence of IκBNS displayed a blunted response compared to wild type-derived Ly6Chigh monocytes as evidenced by the reduced early expression of hallmark transcripts of monocyte-driven inflammation such as Il6, Nos2 and Il1β. Strikingly, altered monocyte activation in IκBNS-deficient mice was associated with an exceptional resistance against Lm infection and protection was associated with a strong reduction in immunopathology in Lm target organs. Of note, mice lacking IκBNS exclusively in myeloid cells failed to resist Lm infection, indicating that the observed effect was not monocyte intrinsic but monocyte extrinsic. While serum cytokine-profiling did not discover obvious differences between wild type and IκBNS -/- mice for most of the analyzed mediators, IL-10 was virtually undetectable in IκBNS-deficient mice, both in the steady state and following Lm infection. Together, we show here a crucial role for IκBNS during Lm infection with IκBNS-deficient mice showing an overall blunted pro-inflammatory immune response attributed to a reduced pro-inflammatory signature in Ly6Chigh monocytes. Reduced immunopathology and complete protection of mice against an otherwise fatal Lm infection identified IκBNS as molecular driver of inflammation in listeriosis.
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Affiliation(s)
- Sarah Frentzel
- Immune Regulation Group, Helmholtz Centre for Infection Research, Braunschweig, Germany,Institute of Medical Microbiology and Hospital Hygiene, Infection Immunology Group, Health Campus Immunology, Infectiology and Inflammation, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Andreas Jeron
- Immune Regulation Group, Helmholtz Centre for Infection Research, Braunschweig, Germany,Institute of Medical Microbiology and Hospital Hygiene, Infection Immunology Group, Health Campus Immunology, Infectiology and Inflammation, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Alexander Pausder
- Immune Regulation Group, Helmholtz Centre for Infection Research, Braunschweig, Germany,Institute of Medical Microbiology and Hospital Hygiene, Infection Immunology Group, Health Campus Immunology, Infectiology and Inflammation, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Olivia Kershaw
- Department of Veterinary Medicine, Institute of Veterinary Pathology, Free University Berlin, Berlin, Germany
| | - Julia Volckmar
- Immune Regulation Group, Helmholtz Centre for Infection Research, Braunschweig, Germany,Institute of Medical Microbiology and Hospital Hygiene, Infection Immunology Group, Health Campus Immunology, Infectiology and Inflammation, Otto-von-Guericke University Magdeburg, Magdeburg, Germany
| | - Ingo Schmitz
- Dept. of Molecular Immunology, Ruhr University Bochum, Bochum, Germany
| | - Dunja Bruder
- Immune Regulation Group, Helmholtz Centre for Infection Research, Braunschweig, Germany,Institute of Medical Microbiology and Hospital Hygiene, Infection Immunology Group, Health Campus Immunology, Infectiology and Inflammation, Otto-von-Guericke University Magdeburg, Magdeburg, Germany,*Correspondence: Dunja Bruder,
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3
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Dwyer JR, Racine JJ, Chapman HD, Quinlan A, Presa M, Stafford GA, Schmitz I, Serreze DV. Nfkbid Overexpression in Nonobese Diabetic Mice Elicits Complete Type 1 Diabetes Resistance in Part Associated with Enhanced Thymic Deletion of Pathogenic CD8 T Cells and Increased Numbers and Activity of Regulatory T Cells. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2022; 209:227-237. [PMID: 35760520 PMCID: PMC9365269 DOI: 10.4049/jimmunol.2100558] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Accepted: 05/13/2022] [Indexed: 06/15/2023]
Abstract
Type 1 diabetes (T1D) in both humans and NOD mice is caused by T cell-mediated autoimmune destruction of pancreatic β cells. Increased frequency or activity of autoreactive T cells and failures of regulatory T cells (Tregs) to control these pathogenic effectors have both been implicated in T1D etiology. Due to the expression of MHC class I molecules on β cells, CD8 T cells represent the ultimate effector population mediating T1D. Developing autoreactive CD8 T cells normally undergo extensive thymic negative selection, but this process is impaired in NOD mice and also likely T1D patients. Previous studies identified an allelic variant of Nfkbid, a NF-κB signal modulator, as a gene strongly contributing to defective thymic deletion of autoreactive CD8 T cells in NOD mice. These previous studies found ablation of Nfkbid in NOD mice using the clustered regularly interspaced short palindromic repeats system resulted in greater thymic deletion of pathogenic CD8 AI4 and NY8.3 TCR transgenic T cells but an unexpected acceleration of T1D onset. This acceleration was associated with reductions in the frequency of peripheral Tregs. In this article, we report transgenic overexpression of Nfkbid in NOD mice also paradoxically results in enhanced thymic deletion of autoreactive CD8 AI4 T cells. However, transgenic elevation of Nfkbid expression also increased the frequency and functional capacity of peripheral Tregs, in part contributing to the induction of complete T1D resistance. Thus, future identification of a pharmaceutical means to enhance Nfkbid expression might ultimately provide an effective T1D intervention approach.
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Affiliation(s)
| | | | | | | | | | | | - Ingo Schmitz
- Department of Molecular Immunology, Ruhr-University, Bochum, Germany
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4
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McGettigan SE, Debes GF. Immunoregulation by antibody secreting cells in inflammation, infection, and cancer. Immunol Rev 2021; 303:103-118. [PMID: 34145601 PMCID: PMC8387433 DOI: 10.1111/imr.12991] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 05/25/2021] [Accepted: 05/26/2021] [Indexed: 12/11/2022]
Abstract
Antibody-secreting cells (ASCs) are considered work horses of the humoral immune response for their tireless effort to produce large amounts of antibodies that fulfill an array of functions in host defense, inflammation, and maintenance of homeostasis. While traditionally considered largely senescent cells, surprising recent findings demonstrate that subsets of ASCs downmodulate ongoing immune responses independent of antibody formation. Such regulatory ASCs produce IL-10 or IL-35 and are implicated in maintaining tissue and immune homeostasis. They also serve to suppress pathogenic leukocytes in infection, allergy, and inflammatory diseases that affect tissues, such as the central nervous system and the respiratory tract. Additionally, regulatory ASCs infiltrate various cancer types and restrict effective anti-tumor T cell responses. While incompletely understood, there is significant overlap in factors that control ASC differentiation, IL-10 expression by B cells and the generation of ASCs that secrete both antibodies and IL-10. In this review, we will cover the biology, phenotype, generation, maintenance and function of regulatory ASCs in various tissues under pathological and steady states. An improved understanding of the development of regulatory ASCs and their biological roles will be critical for generating novel ASC-targeted therapies for the treatment of inflammatory diseases, infection, and cancer.
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Affiliation(s)
- Shannon E. McGettigan
- Department of Microbiology and Immunology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, 19107
| | - Gudrun F. Debes
- Department of Microbiology and Immunology, Sidney Kimmel Medical College, Thomas Jefferson University, Philadelphia, PA, 19107
- Sidney Kimmel Cancer Center, Thomas Jefferson University, Philadelphia, PA, 19107
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5
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Gómez-Chávez F, Correa D, Navarrete-Meneses P, Cancino-Diaz JC, Cancino-Diaz ME, Rodríguez-Martínez S. NF-κB and Its Regulators During Pregnancy. Front Immunol 2021; 12:679106. [PMID: 34025678 PMCID: PMC8131829 DOI: 10.3389/fimmu.2021.679106] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2021] [Accepted: 04/23/2021] [Indexed: 12/25/2022] Open
Abstract
The transcriptional factor NF-κB is a nuclear factor involved in both physiological and pathological processes. This factor can control the transcription of more than 400 genes, including cytokines, chemokines, and their modulators, immune and non-immune receptors, proteins involved in antigen presentation and cell adhesion, acute phase and stress response proteins, regulators of apoptosis, growth factors, other transcription factors and their regulators, as well as different enzymes; all these molecules control several biological processes. NF-κB is a tightly regulated molecule that has also been related to apoptosis, cell proliferation, inflammation, and the control of innate and adaptive immune responses during onset of labor, in which it has a crucial role; thus, early activation of this factor may have an adverse effect, by inducing premature termination of pregnancy, with bad outcomes for the mother and the fetus, including product loss. Reviews compiling the different activities of NF-κB have been reported. However, an update regarding NF-κB regulation during pregnancy is lacking. In this work, we aimed to describe the state of the art around NF-κB activity, its regulatory role in pregnancy, and the effect of its dysregulation due to invasion by pathogens like Trichomonas vaginalis and Toxoplasma gondii as examples.
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Affiliation(s)
- Fernando Gómez-Chávez
- Secretaría de Salud, Cátedras CONACyT-Instituto Nacional de Pediatría, Mexico City, Mexico
- Secretaría de Salud, Laboratorio de Inmunología Experimental, Instituto Nacional de Pediatría, Mexico City, Mexico
- Departamento de Formación Básica Disciplinaria, Escuela Nacional de Medicina y Homeopatía-Instituto Politécnico Nacional, Mexico City, Mexico
| | - Dolores Correa
- Dirección de Investigación, Universidad Anáhuac, Huixquilucan, Mexico
| | - Pilar Navarrete-Meneses
- Laboratorio de Genética y Cáncer, Instituto Nacional de Pediatría, Secretaría de Salud Mexico City, Mexico City, Mexico
| | - Juan Carlos Cancino-Diaz
- Laboratorio de Inmunomicrobiología, Departamento de Microbiología, Escuela Nacional de Ciencias Biológicas-Instituto Politécnico Nacional, Mexico City, Mexico
| | - Mario Eugenio Cancino-Diaz
- Laboratorio de Inmunidad Innata, Departamento de Inmunología, ENCB-Instituto Politécnico Nacional, Mexico City, Mexico
| | - Sandra Rodríguez-Martínez
- Laboratorio de Inmunidad Innata, Departamento de Inmunología, ENCB-Instituto Politécnico Nacional, Mexico City, Mexico
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Ran Z, Yue-Bei L, Qiu-Ming Z, Huan Y. Regulatory B Cells and Its Role in Central Nervous System Inflammatory Demyelinating Diseases. Front Immunol 2020; 11:1884. [PMID: 32973780 PMCID: PMC7468432 DOI: 10.3389/fimmu.2020.01884] [Citation(s) in RCA: 36] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Accepted: 07/13/2020] [Indexed: 12/15/2022] Open
Abstract
Regulatory B (Breg) cells represent a population of suppressor B cells that participate in immunomodulatory processes and inhibition of excessive inflammation. The regulatory function of Breg cells have been demonstrated in mice and human with inflammatory diseases, cancer, after transplantation, and particularly in autoinflammatory disorders. In order to suppress inflammation, Breg cells produce anti-inflammatory mediators, induce death ligand-mediated apoptosis, and regulate many kinds of immune cells such as suppressing the proliferation and differentiation of effector T cell and increasing the number of regulatory T cells. Central nervous system Inflammatory demyelinating diseases (CNS IDDs) are a heterogeneous group of disorders, which occur against the background of an acute or chronic inflammatory process. With the advent of monoclonal antibodies directed against B cells, breakthroughs have been made in the treatment of CNS IDDs. Therefore, the number and function of B cells in IDDs have attracted attention. Meanwhile, increasing number of studies have confirmed that Breg cells play a role in alleviating autoimmune diseases, and treatment with Breg cells has also been proposed as a new therapeutic direction. In this review, we focus on the understanding of the development and function of Breg cells and on the diversification of Breg cells in CNS IDDs.
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Affiliation(s)
- Zhou Ran
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Luo Yue-Bei
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Zeng Qiu-Ming
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Yang Huan
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
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7
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Gómez-Chávez F, López-Portales ÓH, Baeza-Martínez DA, Cancino-Díaz JC, Murrieta-Coxca JM, Cancino-Díaz ME, Pérez-Tapia SM, Rodríguez-Martínez S. IκBNS and IL-6 expression is differentially established in the uterus of pregnant healthy and infected mice. Heliyon 2020; 6:e04122. [PMID: 32577554 PMCID: PMC7301180 DOI: 10.1016/j.heliyon.2020.e04122] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2020] [Revised: 04/28/2020] [Accepted: 05/29/2020] [Indexed: 01/20/2023] Open
Abstract
During pregnancy, NF-κB plays an important role for embryo implantation and the onset of labor. Regulated IL-6 production, under transcriptional control of NF-κB, is essential for a successful pregnancy outcome and the atypical regulator IκBNS is involved in this process. Previously, we showed that IκBNS negatively regulates IL-6 in uterine tissues during mouse estrous cycle. In this work, we analyzed if IκBNS and IL-6 expression in pregnant mice under physiological or L. monocytogenes-infected conditions would remain as observed in estrous cycle. In the healthy pregnancy IL-6 was highly expressed during implantation/placentation and labor stages but decreased during fetal development and post-partum stages. In contrast, in mice infected before pregnancy, IL-6 expression was not increased in the implantation stage, and its regulator IκBNS increased more in the infected condition rather than in the healthy pregnancy. IκBNS expression was reduced in post-implantation infection, allowing for IL-6 overexpression. The IκBNS-unrelated cytokine IL-36γ, used as inflammatory cytokine marker, was severely increased in the infected uterine tissues. When we analyzed the effect of infection over the fetuses, we found that pre-implantation infection caused the resorption (rejection) of some products, while the post-implantation infection restricted the intrauterine growth of fetuses. The results suggest that in the uterine tissue of pregnant mice the regulatory effect of IκBNS over IL-6 is more evident in an infection status rather than in a healthy condition.
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Affiliation(s)
- Fernando Gómez-Chávez
- Laboratorio de Inmunología Experimental, Instituto Nacional de Pediatría, Secretaría de Salud, Mexico City, Mexico.,Cátedras CONACyT-Instituto Nacional de Pediatría, Secretaría de Salud, Mexico.,Departmento de Formación Básica Disciplinaria. Escuela Nacional de Medicina y Homeopatía (ENMyH) - IPN, Mexico City, Mexico
| | - Óscar Humberto López-Portales
- Laboratorio de Inmunología Innata, Departamento de Inmunología, Escuela Nacional de Ciencias Biológicas - Instituto Politécnico Nacional (ENCB-IPN), Mexico City, Mexico
| | - Damariz Adriana Baeza-Martínez
- Laboratorio de Inmunología Innata, Departamento de Inmunología, Escuela Nacional de Ciencias Biológicas - Instituto Politécnico Nacional (ENCB-IPN), Mexico City, Mexico.,Departamento de Enfermería. Facultad de Estudios Superiores - Iztacala, Universidad Nacional Autónoma de México, Mexico City, Mexico
| | | | - José Martín Murrieta-Coxca
- Laboratorio de Inmunología Innata, Departamento de Inmunología, Escuela Nacional de Ciencias Biológicas - Instituto Politécnico Nacional (ENCB-IPN), Mexico City, Mexico
| | - Mario Eugenio Cancino-Díaz
- Laboratorio de Inmunología Innata, Departamento de Inmunología, Escuela Nacional de Ciencias Biológicas - Instituto Politécnico Nacional (ENCB-IPN), Mexico City, Mexico
| | - Sonia Mayra Pérez-Tapia
- Laboratorio Nacional para Servicios Especializados de Investigación, Desarrollo e Innovación (I+D+i) para Farmoquímicos y Biotecnológicos (LANSEIDI-FarBiotec-CONACyT)-ENCB-IPN, Mexico City, Mexico
| | - Sandra Rodríguez-Martínez
- Laboratorio de Inmunología Innata, Departamento de Inmunología, Escuela Nacional de Ciencias Biológicas - Instituto Politécnico Nacional (ENCB-IPN), Mexico City, Mexico
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8
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Ma K, Du W, Wang X, Yuan S, Cai X, Liu D, Li J, Lu L. Multiple Functions of B Cells in the Pathogenesis of Systemic Lupus Erythematosus. Int J Mol Sci 2019; 20:E6021. [PMID: 31795353 PMCID: PMC6929160 DOI: 10.3390/ijms20236021] [Citation(s) in RCA: 61] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2019] [Revised: 11/25/2019] [Accepted: 11/28/2019] [Indexed: 12/15/2022] Open
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease characterized by excessive autoantibody production and multi-organ involvement. Although the etiology of SLE still remains unclear, recent studies have characterized several pathogenic B cell subsets and regulatory B cell subsets involved in the pathogenesis of SLE. Among pathogenic B cell subsets, age-associated B cells (ABCs) are a newly identified subset of autoreactive B cells with T-bet-dependent transcriptional programs and unique functional features in SLE. Accumulation of T-bet+ CD11c+ ABCs has been observed in SLE patients and lupus mouse models. In addition, innate-like B cells with the autoreactive B cell receptor (BCR) expression and long-lived plasma cells with persistent autoantibody production contribute to the development of SLE. Moreover, several regulatory B cell subsets with immune suppressive functions have been identified, while the impaired inhibitory effects of regulatory B cells have been indicated in SLE. Thus, further elucidation on the functional features of B cell subsets will provide new insights in understanding lupus pathogenesis and lead to novel therapeutic interventions in the treatment of SLE.
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Affiliation(s)
- Kongyang Ma
- Department of Rheumatology and Immunology, Second Clinical Medical College of Jinan University, Shenzhen People’s Hospital, Shenzhen 518000, China; (K.M.); (D.L.)
- Department of Pathology and Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong 999077, China; (W.D.); (X.W.)
| | - Wenhan Du
- Department of Pathology and Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong 999077, China; (W.D.); (X.W.)
| | - Xiaohui Wang
- Department of Pathology and Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong 999077, China; (W.D.); (X.W.)
| | - Shiwen Yuan
- Department of Rheumatology, Guangzhou First People’s Hospital, School of Medicine, South China University of Technology, Guangzhou, 510000, China; (S.Y.); (X.C.)
| | - Xiaoyan Cai
- Department of Rheumatology, Guangzhou First People’s Hospital, School of Medicine, South China University of Technology, Guangzhou, 510000, China; (S.Y.); (X.C.)
| | - Dongzhou Liu
- Department of Rheumatology and Immunology, Second Clinical Medical College of Jinan University, Shenzhen People’s Hospital, Shenzhen 518000, China; (K.M.); (D.L.)
| | - Jingyi Li
- Department of Rheumatology and Immunology, Southwest Hospital, The First Hospital Affiliated to The Army Medical University, Chongqing 400038, China
| | - Liwei Lu
- Department of Pathology and Shenzhen Institute of Research and Innovation, The University of Hong Kong, Hong Kong 999077, China; (W.D.); (X.W.)
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9
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Presa M, Racine JJ, Dwyer JR, Lamont DJ, Ratiu JJ, Sarsani VK, Chen YG, Geurts A, Schmitz I, Stearns T, Allocco J, Chapman HD, Serreze DV. A Hypermorphic Nfkbid Allele Contributes to Impaired Thymic Deletion of Autoreactive Diabetogenic CD8 + T Cells in NOD Mice. JOURNAL OF IMMUNOLOGY (BALTIMORE, MD. : 1950) 2018; 201:1907-1917. [PMID: 30127089 PMCID: PMC6143397 DOI: 10.4049/jimmunol.1800465] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 07/23/2018] [Indexed: 11/19/2022]
Abstract
In both NOD mice and humans, the development of type 1 diabetes (T1D) is dependent in part on autoreactive CD8+ T cells recognizing pancreatic β cell peptides presented by often quite common MHC class I variants. Studies in NOD mice previously revealed that the common H2-Kd and/or H2-Db class I molecules expressed by this strain aberrantly lose the ability to mediate the thymic deletion of pathogenic CD8+ T cell responses through interactions with T1D susceptibility genes outside the MHC. A gene(s) mapping to proximal chromosome 7 was previously shown to be an important contributor to the failure of the common class I molecules expressed by NOD mice to mediate the normal thymic negative selection of diabetogenic CD8+ T cells. Using an inducible model of thymic negative selection and mRNA transcript analyses, we initially identified an elevated Nfkbid expression variant as a likely NOD-proximal chromosome 7 region gene contributing to impaired thymic deletion of diabetogenic CD8+ T cells. CRISPR/Cas9-mediated genetic attenuation of Nfkbid expression in NOD mice resulted in improved negative selection of autoreactive diabetogenic AI4 and NY8.3 CD8+ T cells. These results indicated that allelic variants of Nfkbid contribute to the efficiency of intrathymic deletion of diabetogenic CD8+ T cells. However, although enhancing thymic deletion of pathogenic CD8+ T cells, ablating Nfkbid expression surprisingly accelerated T1D onset that was associated with numeric decreases in both regulatory T and B lymphocytes in NOD mice.
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Affiliation(s)
| | | | | | | | | | | | | | - Aron Geurts
- Medical College of Wisconsin, Milwaukee, WI 53226
| | - Ingo Schmitz
- Systems-Oriented Immunology and Inflammation Research Group, Helmholtz Centre for Infection Research, 38124 Braunschweig, Germany; and
- Institute of Molecular and Clinical Immunology, Otto-von-Guericke University, 39120 Magdeburg, Germany
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10
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Ádori M, Pedersen GK, Ádori C, Erikson E, Khoenkhoen S, Stark JM, Choi JH, Dosenovic P, Karlsson MCI, Beutler B, Karlsson Hedestam GB. Altered Marginal Zone B Cell Selection in the Absence of IκBNS. THE JOURNAL OF IMMUNOLOGY 2018; 200:775-787. [PMID: 29222168 DOI: 10.4049/jimmunol.1700791] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/31/2017] [Accepted: 11/07/2017] [Indexed: 12/20/2022]
Abstract
Marginal zone (MZ) B cells reside in the splenic MZ and play important roles in T cell-independent humoral immune responses against blood-borne pathogens. IκBNS-deficient bumble mice exhibit a severe reduction in the MZ B compartment but regain an MZ B population with age and, thus, represent a valuable model to examine the biology of MZ B cells. In this article, we characterized the MZ B cell defect in further detail and investigated the nature of the B cells that appear in the MZ of aged bumble mice. Flow cytometry analysis of the splenic transitional B cell subsets demonstrated that MZ B cell development was blocked at the transitional-1 to transitional-2-MZ precursor stage in the absence of functional IκBNS. Immunohistochemical analysis of spleen sections from wild-type and bumble mice revealed no alteration in the cellular MZ microenvironment, and analysis of bone marrow chimeras indicated that the MZ B cell development defect in bumble mice was B cell intrinsic. Further, we demonstrate that the B cells that repopulate the MZ in aged bumble mice were distinct from age-matched wild-type MZ B cells. Specifically, the expression of surface markers characteristic for MZ B cells was altered and the L chain Igλ+ repertoire was reduced in bumble mice. Finally, plasma cell differentiation of sorted LPS-stimulated MZ B cells was impaired, and aged bumble mice were unable to respond to NP-Ficoll immunization. These results demonstrate that IκBNS is required for an intact MZ B cell compartment in C57BL/6 mice.
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Affiliation(s)
- Monika Ádori
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, S-171 77 Stockholm, Sweden
| | - Gabriel K Pedersen
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, S-171 77 Stockholm, Sweden
| | - Csaba Ádori
- Department of Neuroscience, Karolinska Institutet, S-171 77 Stockholm, Sweden; and
| | - Elina Erikson
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, S-171 77 Stockholm, Sweden
| | - Sharesta Khoenkhoen
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, S-171 77 Stockholm, Sweden
| | - Julian M Stark
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, S-171 77 Stockholm, Sweden
| | - Jin Huk Choi
- Center for the Genetics of Host Defense, UT Southwestern Medical Center, Dallas, TX 75390-8505
| | - Pia Dosenovic
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, S-171 77 Stockholm, Sweden
| | - Mikael C I Karlsson
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, S-171 77 Stockholm, Sweden
| | - Bruce Beutler
- Center for the Genetics of Host Defense, UT Southwestern Medical Center, Dallas, TX 75390-8505
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