1
|
Akkoyunlu M, Katsenelson N, Uslu K, Allman W. Crucial role for TACI in TLR activation and macrophage phenotype determination (P1206). The Journal of Immunology 2013. [DOI: 10.4049/jimmunol.190.supp.138.2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Abstract
Transmembrane activator and calcium-modulator and cyclophilin ligand interactor (TACI) regulates antibody responses to T cell independent type 2 (TI-2) antigens such as polysaccharides. However, it is not known whether TACI is important in generation of Ab response against T cell dependent (TD) antigens. In this study, we investigated the role of TACI in Ab responses against Neisseria meningitidis type C polysaccharide-tetanus toxoid conjugate (MCPS-TT) vaccine. We found that TACI-/- mice had lower amounts of Abs against MCPS and TT compared to WT mice. More importantly, even the potent adjuvant CpG did not augment Ab responses to MCPS-TT vaccine in TACI-/- mice. Stimulation of splenic cells or peritoneal macrophages of TACI-/- mice with CpG, LPS, or PolyI:C led to a significantly impaired production of pro-inflammatory cytokines and lower levels of co-stimulatory molecule upregulation, suggesting that TACI plays a key role in TLR signaling. Significantly lower expression of TLR9, TLR4, TLR3 and CD14 as well as impaired co-localization of the adaptor molecules, MyD88 and TRIF with the TLR receptors is likely to play a role in the impaired TLR response in TACI-/- mice. Further characterization of TACI-/- macrophages revealed that they manifest the characteristics of alternatively activated (M2) macrophages. Thus, M2 macrophage phenotype appears to be responsible for the impaired TLR activation and poor Ab responses to TD antigens in TACI-/- mice.
Collapse
Affiliation(s)
| | - Nora Katsenelson
- 1Laboratory of Bacterial Polysaccharides, CBER, FDA, Bethesda, MD
| | - Kadriye Uslu
- 1Laboratory of Bacterial Polysaccharides, CBER, FDA, Bethesda, MD
| | - Windy Allman
- 1Laboratory of Bacterial Polysaccharides, CBER, FDA, Bethesda, MD
| |
Collapse
|
2
|
Tüzün E, Allman W, Ulusoy C, Yang H, Christadoss P. Novel animal models of acetylcholine receptor antibody-related myasthenia gravis. Ann N Y Acad Sci 2012; 1274:133-9. [DOI: 10.1111/j.1749-6632.2012.06773.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
|
3
|
Allman W, Qi H, Saini SS, Li J, Tuzun E, Christadoss P. CD4 costimulation is not required in a novel LPS-enhanced model of myasthenia gravis. J Neuroimmunol 2012; 249:1-7. [PMID: 22626443 DOI: 10.1016/j.jneuroim.2012.04.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2011] [Revised: 03/08/2012] [Accepted: 04/04/2012] [Indexed: 01/30/2023]
Abstract
The potential of lipopolysaccharide (LPS) to induce antigen-specific B cell responses to acetylcholine receptor (AChR) in myasthenia gravis (MG) was evaluated in wild type (WT) and CD4-/- C57BL/6 mice. The WT mice immunized with AChR in LPS developed an MG-like disease (LPS-EAMG) similar to that induced by immunization with AChR in complete Freund's adjuvant (CFA-EAMG). CD4-/- mice were resistant to CFA-EAMG but susceptible to LPS-EAMG. LPS abrogated EAMG resistance in CD4-/- mice by increasing high-affinity anti-AChR IgG2b in sera and enhancing immune complex deposition in muscle.
Collapse
Affiliation(s)
- Windy Allman
- Department of Microbiology and Immunology, The University of Texas Medical Branch, 301 University Blvd., Galveston, TX 77555-1070, United States
| | | | | | | | | | | |
Collapse
|
4
|
Wu X, Tuzun E, Li J, Xiao T, Saini SS, Qi H, Allman W, Christadoss P. Ocular and generalized myasthenia gravis induced by human acetylcholine receptor γ subunit immunization. Muscle Nerve 2012; 45:209-16. [DOI: 10.1002/mus.22273] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
|
5
|
Allman W, Saini SS, Tuzun E, Christadoss P. Characterization of peripheral blood acetylcholine receptor-binding B cells in experimental myasthenia gravis. Cell Immunol 2011; 271:292-8. [PMID: 21861992 DOI: 10.1016/j.cellimm.2011.07.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2010] [Revised: 06/16/2011] [Accepted: 07/12/2011] [Indexed: 12/20/2022]
Abstract
In myasthenia gravis (MG), the neuromuscular transmission is impaired by antibodies (Abs) specific for muscle acetylcholine receptor (AChR). Anti-AChR Abs can be detected in the serum of MG patients, although their levels do not correlate with disease severity. In this study, we developed a flow cytometric assay for the detection of peripheral blood AChR-specific B cells to characterize B cell phenotypes associated with experimental autoimmune myasthenia gravis (EAMG). Alexa-conjugated AChR was used as a probe for AChR-specific B cells (B220+Ig+). Mice with EAMG had significantly elevated frequencies of AChR-specific IgG2+ and IgM+ B cells. While the frequencies of IgG2+ B cells and plasma anti-AChR IgG2 levels significantly correlated with the clinical grades of EAMG, the frequencies of IgM+ B cells and plasma anti-AChR IgM levels did not. These results indicate that the frequency of AChR-specific and IgG1+ (mouse IgG2 equivalent) peripheral blood B cells and anti-AChR IgG1 levels could be potential biomarkers for MG disease severity.
Collapse
Affiliation(s)
- Windy Allman
- Department of Microbiology and Immunology, The University of Texas Medical Branch, Galveston, TX 77555-1070, United States
| | | | | | | |
Collapse
|
6
|
Qi H, Li J, Allman W, Saini SS, Tüzün E, Wu X, Estes DM, Christadoss P. Genetic deficiency of estrogen receptor alpha fails to influence experimental autoimmune myasthenia gravis pathogenesis. J Neuroimmunol 2011; 234:165-7. [DOI: 10.1016/j.jneuroim.2011.03.002] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2010] [Revised: 02/24/2011] [Accepted: 03/04/2011] [Indexed: 10/18/2022]
|
7
|
Kanswal S, Katsenelson N, Allman W, Uslu K, Blake MS, Akkoyunlu M. Suppressive effect of bacterial polysaccharides on BAFF system is responsible for their poor immunogenicity. J Immunol 2011; 186:2430-43. [PMID: 21248261 DOI: 10.4049/jimmunol.1002976] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Capsular polysaccharides of encapsulated bacteria are weakly immunogenic T cell-independent type 2 (TI-2) Ags. Recent findings suggest that BAFF system molecules have a critical role in the development of Ab responses against TI-2 Ags. In this study, we investigated the effect of bacterial polysaccharides on B cell responses to BAFF and a proliferation-inducing ligand (APRIL). We determined that B cells exposed to meningococcal type C polysaccharide (MCPS) or group B Streptococcus serotype V (GBS-V) were unresponsive to BAFF- and APRIL-induced Ig secretion. Moreover, MCPS and GBS-V strongly downregulated transmembrane activator and calcium-modulator and cyclophilin ligand interactor, the BAFF and APRIL receptor that is responsible for Ab development against TI-2 Ags. Interestingly, (4-hydroxy-3-nitrophenyl)acetyl-Ficoll (NP-Ficoll), a prototype TI-2 Ag, did not manifest a suppressive effect on B cells. Paradoxically, whereas GBS-V and MCPS inhibited IFN-γ-induced BAFF production from dendritic cells, NP-Ficoll strongly increased BAFF secretion. TLR 9 agonist CpG deoxyoligonucleotide (ODN) was able to reverse the MCPS-mediated transmembrane activator and calcium-modulator and cyclophilin ligand interactor suppression but could not rescue the Ig secretion in BAFF- or APRIL-stimulated B cells. In support of these in vitro observations, it was observed that CpG ODN could help augment the Ab response against NP in mice immunized with a CpG ODN-containing NP-Ficoll vaccine but exhibited only marginal adjuvant activity for MCPS vaccine. Collectively, these results suggest a mechanism for the weak immunogenicity of bacterial polysaccharides and explain the previously observed differences between bacterial polysaccharide and NP-Ficoll immunogenicity.
Collapse
Affiliation(s)
- Sunita Kanswal
- Laboratory of Bacterial Polysaccharides, Division of Bacterial Parasitic and Allergenic Products, Center for Biologics Evaluation and Research, US Food and Drug Administration, Bethesda, MD 20852, USA
| | | | | | | | | | | |
Collapse
|
8
|
Chaussabel D, Quinn C, Shen J, Patel P, Glaser C, Baldwin N, Stichweh D, Blankenship D, Li L, Munagala I, Bennett L, Allantaz F, Mejias A, Ardura M, Kaizer E, Monnet L, Allman W, Randall H, Johnson D, Lanier A, Punaro M, Wittkowski KM, White P, Fay J, Klintmalm G, Ramilo O, Palucka AK, Banchereau J, Pascual V. A modular analysis framework for blood genomics studies: application to systemic lupus erythematosus. Immunity 2008; 29:150-64. [PMID: 18631455 DOI: 10.1016/j.immuni.2008.05.012] [Citation(s) in RCA: 498] [Impact Index Per Article: 31.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2006] [Revised: 11/15/2007] [Accepted: 05/06/2008] [Indexed: 11/16/2022]
Abstract
The analysis of patient blood transcriptional profiles offers a means to investigate the immunological mechanisms relevant to human diseases on a genome-wide scale. In addition, such studies provide a basis for the discovery of clinically relevant biomarker signatures. We designed a strategy for microarray analysis that is based on the identification of transcriptional modules formed by genes coordinately expressed in multiple disease data sets. Mapping changes in gene expression at the module level generated disease-specific transcriptional fingerprints that provide a stable framework for the visualization and functional interpretation of microarray data. These transcriptional modules were used as a basis for the selection of biomarkers and the development of a multivariate transcriptional indicator of disease progression in patients with systemic lupus erythematosus. Thus, this work describes the implementation and application of a methodology designed to support systems-scale analysis of the human immune system in translational research settings.
Collapse
Affiliation(s)
- Damien Chaussabel
- Baylor NIAID Cooperative Center for Translational Research on Human Immunology and Biodefense, Baylor Institute for Immunology Research and Baylor Research Institute, Dallas, TX 75204, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
9
|
Qi H, Tüzün E, Allman W, Saini SS, Penabad ZR, Pierangeli S, Christadoss P. C5a is not involved in experimental autoimmune myasthenia gravis pathogenesis. J Neuroimmunol 2008; 196:101-6. [PMID: 18455242 DOI: 10.1016/j.jneuroim.2008.03.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2008] [Revised: 03/10/2008] [Accepted: 03/10/2008] [Indexed: 10/22/2022]
Abstract
C5 deficient mice are highly resistant to experimental autoimmune myasthenia gravis (EAMG) despite intact immune response to acetylcholine receptor (AChR), validating the pivotal role played by membrane attack complex (MAC, C5b-9) in neuromuscular junction destruction. To distinguish the significance of C5a from that of C5b in EAMG pathogenesis, C5a receptor (C5aR) knockout (KO) and wild-type (WT) mice were immunized with AChR to induce pathogenic anti-AChR antibodies. In contrast with C5 deficient mice, C5aR KO mice were equally susceptible to EAMG as WT mice and exhibited comparable antibody and lymphocyte proliferation response to AChR implicating that C5a is not involved in EAMG development.
Collapse
Affiliation(s)
- Huibin Qi
- Department of Microbiology and Immunology, The University of Texas Medical Branch, Galveston, TX 77555-1070, USA
| | | | | | | | | | | | | |
Collapse
|
10
|
Yang H, Wu B, Tu¨zu¨n E, Saini SS, Li J, Allman W, Higgs S, Xiao TL, Christadoss P. A New Mouse Model of Autoimmune Ocular Myasthenia Gravis. ACTA ACUST UNITED AC 2007; 48:5101-11. [DOI: 10.1167/iovs.07-0271] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Affiliation(s)
- Huan Yang
- From the Departments of Microbiology and Immunology,
| | - Bo Wu
- Department of Neurology, UT Southwestern Medical Center, Dallas, Texas
| | - Erdem Tu¨zu¨n
- From the Departments of Microbiology and Immunology,
| | | | - Jing Li
- From the Departments of Microbiology and Immunology,
| | - Windy Allman
- From the Departments of Microbiology and Immunology,
| | | | - Tian Lin Xiao
- Ophthalmology, University of Texas Medical Branch, Galveston, Texas; and the
| | | |
Collapse
|
11
|
Allantaz F, Chaussabel D, Stichweh D, Bennett L, Allman W, Mejias A, Ardura M, Chung W, Smith E, Wise C, Palucka K, Ramilo O, Punaro M, Banchereau J, Pascual V. Blood leukocyte microarrays to diagnose systemic onset juvenile idiopathic arthritis and follow the response to IL-1 blockade. ACTA ACUST UNITED AC 2007; 204:2131-44. [PMID: 17724127 PMCID: PMC2118700 DOI: 10.1084/jem.20070070] [Citation(s) in RCA: 169] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Systemic onset juvenile idiopathic arthritis (SoJIA) represents up to 20% of juvenile idiopathic arthritis. We recently reported that interleukin (IL) 1 is an important mediator of this disease and that IL-1 blockade induces clinical remission. However, lack of specificity of the initial systemic manifestations leads to delays in diagnosis and initiation of therapy. To develop a specific diagnostic test, we analyzed leukocyte gene expression profiles of 44 pediatric SoJIA patients, 94 pediatric patients with acute viral and bacterial infections, 38 pediatric patients with systemic lupus erythematosus (SLE), 6 patients with PAPA syndrome, and 39 healthy children. Statistical group comparison and class prediction identified genes differentially expressed in SoJIA patients compared with healthy children. These genes, however, were also changed in patients with acute infections and SLE. An analysis of significance across all diagnostic groups identified 88 SoJIA-specific genes, 12 of which accurately classified an independent set of SoJIA patients with systemic disease. Transcripts that changed significantly in patients undergoing IL-1 blockade were also identified. Thus, leukocyte transcriptional signatures can be used to distinguish SoJIA from other febrile illnesses and to assess response to therapy. Availability of early diagnostic markers may allow prompt initiation of therapy and prevention of disabilities.
Collapse
Affiliation(s)
- Florence Allantaz
- Baylor National Institute of Allergy and Infectious Diseases Cooperative Center for Translational Research on Human Immunology and Biodefense, Dallas, TX 75204, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
12
|
Ramilo O, Allman W, Chung W, Mejias A, Ardura M, Glaser C, Wittkowski KM, Piqueras B, Banchereau J, Palucka AK, Chaussabel D. Gene expression patterns in blood leukocytes discriminate patients with acute infections. Blood 2006; 109:2066-77. [PMID: 17105821 PMCID: PMC1801073 DOI: 10.1182/blood-2006-02-002477] [Citation(s) in RCA: 371] [Impact Index Per Article: 20.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Each infectious agent represents a unique combination of pathogen-associated molecular patterns that interact with specific pattern-recognition receptors expressed on immune cells. Therefore, we surmised that the blood immune cells of individuals with different infections might bear discriminative transcriptional signatures. Gene expression profiles were obtained for 131 peripheral blood samples from pediatric patients with acute infections caused by influenza A virus, Gram-negative (Escherichia coli) or Gram-positive (Staphylococcus aureus and Streptococcus pneumoniae) bacteria. Thirty-five genes were identified that best discriminate patients with influenza A virus infection from patients with either E coli or S pneumoniae infection. These genes classified with 95% accuracy (35 of 37 samples) an independent set of patients with either influenza A, E coli, or S pneumoniae infection. A different signature discriminated patients with E coli versus S aureus infections with 85% accuracy (34 of 40). Furthermore, distinctive gene expression patterns were observed in patients presenting with respiratory infections of different etiologies. Thus, microarray analyses of patient peripheral blood leukocytes might assist in the differential diagnosis of infectious diseases.
Collapse
Affiliation(s)
- Octavio Ramilo
- Baylor National Institute of Allergy and Infections Diseases (NIAID) Cooperative Center for Translational Research on Human Immunology and Biodefense and Baylor Institute for Immunology Research, Dallas, TX 75204, USA.
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
13
|
Chaussabel D, Allman W, Mejias A, Chung W, Bennett L, Ramilo O, Pascual V, Palucka AK, Banchereau J. Analysis of Significance Patterns Identifies Ubiquitous and Disease-Specific Gene-Expression Signatures in Patient Peripheral Blood Leukocytes. Ann N Y Acad Sci 2005; 1062:146-54. [PMID: 16461797 DOI: 10.1196/annals.1358.017] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
The utilization of gene-expression microarrays in patient-based research creates new prospects for the discovery of diagnostic biomarkers and the identification of genes or pathways linked to pathogenesis. Gene-expression signatures in peripheral blood mononuclear cells isolated from over one hundred patients with conditions presenting a strong immunological component (patient with autoimmune, graft versus host and infectious diseases, as well as immunosuppressed transplant recipients) were generated. This dataset provides the opportunity to carry out comparative analyses and define disease signatures in a broader context. Transcriptional changes of 22,283 probe sets were evaluated through statistical group comparison performed systematically for seven diseases versus their respective healthy control group. Patterns of significance were generated by hierarchical clustering of P-values. This approach led to the identification of a SLE-specific "diagnostic signature," formed by genes that did not change compared to healthy subjects in the other six diseases. Conversely, a "sentinel signature" that was common to all seven diseases was characterized. These findings bring new perspectives for the application of blood leukocyte expression signatures for diagnosis and early disease detection.
Collapse
Affiliation(s)
- Damien Chaussabel
- The Baylor NIAID Cooperative Center for Translational Research on Human Immunology and Biodefense and Baylor Institute for Immunology Research, 3434 Live Oak Street, Suite 205, Dallas, TX 75204, USA.
| | | | | | | | | | | | | | | | | |
Collapse
|