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Heiss K, Heidepriem J, Fischer N, Weber LK, Dahlke C, Jaenisch T, Loeffler FF. Rapid Response to Pandemic Threats: Immunogenic Epitope Detection of Pandemic Pathogens for Diagnostics and Vaccine Development Using Peptide Microarrays. J Proteome Res 2020; 19:4339-4354. [PMID: 32892628 PMCID: PMC7640972 DOI: 10.1021/acs.jproteome.0c00484] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Indexed: 12/18/2022]
Abstract
Emergence and re-emergence of pathogens bearing the risk of becoming a pandemic threat are on the rise. Increased travel and trade, growing population density, changes in urbanization, and climate have a critical impact on infectious disease spread. Currently, the world is confronted with the emergence of a novel coronavirus SARS-CoV-2, responsible for yet more than 800 000 deaths globally. Outbreaks caused by viruses, such as SARS-CoV-2, HIV, Ebola, influenza, and Zika, have increased over the past decade, underlining the need for a rapid development of diagnostics and vaccines. Hence, the rational identification of biomarkers for diagnostic measures on the one hand, and antigenic targets for vaccine development on the other, are of utmost importance. Peptide microarrays can display large numbers of putative target proteins translated into overlapping linear (and cyclic) peptides for a multiplexed, high-throughput antibody analysis. This enabled for example the identification of discriminant/diagnostic epitopes in Zika or influenza and mapping epitope evolution in natural infections versus vaccinations. In this review, we highlight synthesis platforms that facilitate fast and flexible generation of high-density peptide microarrays. We further outline the multifaceted applications of these peptide array platforms for the development of serological tests and vaccines to quickly encounter pandemic threats.
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Affiliation(s)
- Kirsten Heiss
- PEPperPRINT
GmbH, Rischerstrasse
12, 69123 Heidelberg, Germany
| | - Jasmin Heidepriem
- Max
Planck Institute of Colloids and Interfaces, Department of Biomolecular Systems, Am Muehlenberg 1, 14476 Potsdam, Germany
| | - Nico Fischer
- Section
Clinical Tropical Medicine, Department of Infectious Diseases, Heidelberg University Hospital, INF 324, 69120 Heidelberg, Germany
| | - Laura K. Weber
- PEPperPRINT
GmbH, Rischerstrasse
12, 69123 Heidelberg, Germany
- Institute
of Microstructure Technology, Karlsruhe
Institute of Technology, Hermann-von-Helmholtz-Platz 1, 76344 Eggenstein-Leopoldshafen, Germany
| | - Christine Dahlke
- Division
of Infectious Diseases, First Department of Medicine, University Medical Center Hamburg-Eppendorf, 20246 Hamburg, Germany
- Department
of Clinical Immunology of Infectious Diseases, Bernhard Nocht Institute for Tropical Medicine, 20359 Hamburg, Germany
- German
Center for Infection Research, Partner Site
Hamburg-Lübeck-Borstel-Riems, 38124 Braunschweig, Germany
| | - Thomas Jaenisch
- Heidelberg
Institute of Global Health (HIGH), Heidelberg
University Hospital, Im Neuenheimer Feld 130, 69120 Heidelberg, Germany
- Center
for Global Health, Colorado School of Public Health, University of Colorado, Aurora, Colorado 80045, United States
- Department
of Epidemiology, Colorado School of Public Health, University of Colorado, Aurora, Colorado 80045, United States
| | - Felix F. Loeffler
- Max
Planck Institute of Colloids and Interfaces, Department of Biomolecular Systems, Am Muehlenberg 1, 14476 Potsdam, Germany
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Levinson M, Khass M, Burrows PD, Schroeder HW. Replacement of TCR Dβ With Immunoglobulin D H DSP2.3 Imposes a Tyrosine-Enriched TCR Repertoire and Adversely Affects T Cell Development. Front Immunol 2020; 11:573413. [PMID: 33133088 PMCID: PMC7550431 DOI: 10.3389/fimmu.2020.573413] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Accepted: 09/07/2020] [Indexed: 11/13/2022] Open
Abstract
Enrichment for tyrosine in immunoglobulin CDR-H3 is due in large part to natural selection of germline immunoglobulin DH sequence. We have previously shown that when DH sequence is modified to reduce the contribution of tyrosine codons, epitope recognition is altered and B cell development, antibody production, autoantibody production, and morbidity and mortality following pathogen challenge are adversely affected. TCRβ diversity (Dβ) gene segment sequences are even more highly conserved than DH, with trout Dβ1 identical to human and mouse Dβ1. We hypothesized that natural selection of Dβ sequence also shapes CDR-B3 diversity and influences T cell development and T cell function. To test this, we used a mouse strain that lacked Dβ2 and contained a novel Dβ1 allele (DβYTL) that replaces Dβ1 with an immunoglobulin DH, DSP2.3. Unlike Dβ1, wherein glycine predominates in all three reading frames (RFs), in DSP2.3 there is enrichment for tyrosine in RF1, threonine in RF2, and leucine in RF3. Mature T cells using DβYTL expressed TCRs enriched at particular CDR-B3 positions for tyrosine but depleted of leucine. Changing Dβ sequence altered thymocyte and peripheral T cell numbers and the T cell response to an ovalbumin immunodominant epitope. The differences in tyrosine content might explain, at least in part, why TCRs are more polyspecific and of lower affinity for their cognate antigens than their immunoglobulin counterparts.
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MESH Headings
- Animals
- Complementarity Determining Regions
- Genes, Immunoglobulin Heavy Chain
- Genes, T-Cell Receptor beta
- Immunization
- Immunodominant Epitopes
- Immunoglobulin Heavy Chains/genetics
- Immunoglobulin Heavy Chains/metabolism
- Lymphocyte Activation
- Mice, Inbred C57BL
- Mice, Knockout
- Ovalbumin/administration & dosage
- Ovalbumin/immunology
- Phenotype
- Receptors, Antigen, T-Cell, alpha-beta/genetics
- Receptors, Antigen, T-Cell, alpha-beta/metabolism
- T-Lymphocytes/immunology
- T-Lymphocytes/metabolism
- Thymocytes/immunology
- Thymocytes/metabolism
- Tyrosine
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Affiliation(s)
- Michael Levinson
- Division of Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Mohamed Khass
- Division of Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
- Division of Genetic Engineering and Biotechnology, National Research Center, Cairo, Egypt
| | - Peter D. Burrows
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Harry W. Schroeder
- Division of Clinical Immunology and Rheumatology, Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
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3
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Khass M, Vale AM, Burrows PD, Schroeder HW. The sequences encoded by immunoglobulin diversity (D H ) gene segments play key roles in controlling B-cell development, antigen-binding site diversity, and antibody production. Immunol Rev 2019; 284:106-119. [PMID: 29944758 DOI: 10.1111/imr.12669] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Although at first glance the diversity of the immunoglobulin repertoire appears random, there are a number of mechanisms that act to constrain diversity. For example, key mechanisms controlling the diversity of the third complementarity determining region of the immunoglobulin heavy chain (CDR-H3) include natural selection of germline diversity (DH ) gene segment sequence and somatic selection upon passage through successive B-cell developmental checkpoints. To test the role of DH gene segment sequence, we generated a panel of mice limited to the use of a single germline or frameshifted DH gene segment. Specific individual amino acids within core DH gene segment sequence heavily influenced the absolute numbers of developing and mature B-cell subsets, antibody production, epitope recognition, protection against pathogen challenge, and susceptibility to the production of autoreactive antibodies. At the tip of the antigen-binding loop (PDB position 101) in CDR-H3, both natural (germline) and somatic selection favored tyrosine while disfavoring the presence of hydrophobic amino acids. Enrichment for arginine in CDR-H3 appeared to broaden recognition of epitopes of varying hydrophobicity, but led to diminished binding intensity and an increased likelihood of generating potentially pathogenic dsDNA-binding autoreactive antibodies. The phenotype of altering the sequence of the DH was recessive for T-independent antibody production, but dominant for T-cell-dependent responses. Our work suggests that the antibody repertoire is structured, with the sequence of individual DH selected by evolution to preferentially generate an apparently preferred category of antigen-binding sites. The result of this structured approach appears to be a repertoire that has been adapted, or optimized, to produce protective antibodies for a wide range of pathogen epitopes while reducing the likelihood of generating autoreactive specificities.
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Affiliation(s)
- Mohamed Khass
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA.,Division of Genetic Engineering and Biotechnology, National Research Center, Cairo, Egypt
| | - Andre M Vale
- Program in Immunobiology, Laboratory of Lymphocyte Biology, Carlos Chagas Filho Biophysics Institute, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Peter D Burrows
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, USA
| | - Harry W Schroeder
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, USA
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Du L, Wang S, Zhu Y, Zhao H, Basit A, Yu X, Li Q, Sun X. Immunoglobulin heavy chain variable region analysis in dairy goats. Immunobiology 2018; 223:599-607. [PMID: 30025710 DOI: 10.1016/j.imbio.2018.07.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2017] [Revised: 01/12/2018] [Accepted: 07/05/2018] [Indexed: 10/28/2022]
Abstract
Based on the goat genome database, we have annotated the genomic organization of the goat immunoglobulin heavy chain variable region. The goat IgH locus is present on seven genome scaffolds, and contains ten VH, three DH and six JH segments. After the exclusion of three shorter segments, the VH genes were divided into two gene families based on sequence similarity. By analyzing the IgH cDNA sequences, we further identified that VH2 (54.2%), DH1 (61.7%) and JH1 (60.5%) segments were most frequently utilized in the expression of the immunoglobulin variable region, and that point mutations introduced by somatic hypermutation were the major mutation present in these expressed variable region. Compared with human and horses, DH-DH fusion occurred at a higher frequency in goat V(D)J recombination. These results provided variable insights into goat immunoglobulin heavy chain variable region genome loci and repertoire diversity.
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Affiliation(s)
- Lijuan Du
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China; State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Shuhui Wang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Yanjiao Zhu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Haidong Zhao
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Abdul Basit
- State Key Laboratory of Agrobiotechnology, College of Biological Sciences, China Agricultural University, Beijing 100193, China
| | - Xiaohui Yu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Qingwang Li
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China
| | - Xiuzhu Sun
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, 712100, China.
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5
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Hartman H, Wang Y, Schroeder HW, Cui X. Absorbance summation: A novel approach for analyzing high-throughput ELISA data in the absence of a standard. PLoS One 2018; 13:e0198528. [PMID: 29883460 PMCID: PMC5993274 DOI: 10.1371/journal.pone.0198528] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2017] [Accepted: 05/21/2018] [Indexed: 11/18/2022] Open
Abstract
We have developed a very simple method, termed absorbance summation (AS), for comparing protein concentrations between samples in ELISA assays without a standard. This method sums the observed absorbance values from all dilutions to obtain one data point for each sample to be used for comparison. AS is less computationally intensive than fitting sigmoidal curves, and it avoids the difficulty of parameter estimation for samples with absorbance values lying primarily at the lower tail of the curve. Our simulation studies showed that it performs much better than the sigmoidal curve fitting method and the conventional endpoint titer method. The power of this simple method is as high as the formal curve fitting followed by the estimation of area under the curve (AUC).
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Affiliation(s)
- Holly Hartman
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Yuge Wang
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Harry W. Schroeder
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
- Department of Medicine, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
| | - Xiangqin Cui
- Department of Biostatistics, University of Alabama at Birmingham, Birmingham, Alabama, United States of America
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6
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Khass M, Blackburn T, Elgavish A, Burrows PD, Schroeder HW. In the Absence of Central pre-B Cell Receptor Selection, Peripheral Selection Attempts to Optimize the Antibody Repertoire by Enriching for CDR-H3 Y101. Front Immunol 2018; 9:120. [PMID: 29472919 PMCID: PMC5810287 DOI: 10.3389/fimmu.2018.00120] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2017] [Accepted: 01/15/2018] [Indexed: 01/13/2023] Open
Abstract
Sequential developmental checkpoints are used to “optimize” the B cell antigen receptor repertoire by minimizing production of autoreactive or useless immunoglobulins and enriching for potentially protective antibodies. The first and apparently most impactful checkpoint requires μHC to form a functional pre-B cell receptor (preBCR) by associating with surrogate light chain, which is composed of VpreB and λ5. Absence of any of the preBCR components causes a block in B cell development that is characterized by severe immature B cell lymphopenia. Previously, we showed that preBCR controls the amino acid content of the third complementary determining region of the H chain (CDR-H3) by using a VpreB amino acid motif (RDR) to select for tyrosine at CDR-H3 position 101 (Y101). In antibodies bound to antigen, Y101 is commonly in direct contact with the antigen, thus preBCR selection impacts the antigen binding characteristics of the repertoire. In this work, we sought to determine the forces that shape the peripheral B cell repertoire when it is denied preBCR selection. Using bromodeoxyuridine incorporation and evaluation of apoptosis, we found that in the absence of preBCR there is increased turnover of B cells due to increased apoptosis. CDR-H3 sequencing revealed that this is accompanied by adjustments to DH identity, DH reading frame, JH, and CDR-H3 amino acid content. These adjustments in the periphery led to wild-type levels of CDR-H3 Y101 content among transitional (T1), mature recirculating, and marginal zone B cells. However, peripheral selection proved incomplete, with failure to restore Y101 levels in follicular B cells and increased production of dsDNA-binding IgM antibodies.
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Affiliation(s)
- Mohamed Khass
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States.,Genetic Engineering and Biotechnology Division, National Research Center, Cairo, Egypt
| | - Tessa Blackburn
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Ada Elgavish
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Peter D Burrows
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, United States
| | - Harry W Schroeder
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL, United States.,Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL, United States
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7
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Sun Z, Yan L, Tang J, Qian Q, Lenberg J, Zhu D, Liu W, Wu K, Wang Y, Lu S. Brief introduction of current technologies in isolation of broadly neutralizing HIV-1 antibodies. Virus Res 2017; 243:75-82. [PMID: 29051051 PMCID: PMC7114535 DOI: 10.1016/j.virusres.2017.10.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Revised: 10/13/2017] [Accepted: 10/15/2017] [Indexed: 12/11/2022]
Abstract
HIV/AIDS has become a worldwide pandemic. Before an effective HIV-1 vaccine eliciting broadly neutralizing monoclonal antibodies (bnmAbs) is fully developed, passive immunization for prevention and treatment of HIV-1 infection may alleviate the burden caused by the pandemic. Among HIV-1 infected individuals, about 20% of them generated cross-reactive neutralizing antibodies two to four years after infection, the details of which could provide knowledge for effective vaccine design. Recent progress in techniques for isolation of human broadly neutralizing antibodies has facilitated the study of passive immunization. The isolation and characterization of large panels of potent human broadly neutralizing antibodies has revealed new insights into the principles of antibody-mediated neutralization of HIV. In this paper, we review the current effective techniques in broadly neutralizing antibody isolation.
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Affiliation(s)
- Zehua Sun
- Department of Medicine, National Jewish Health, 1400 Jackson Street, Denver, CO, 80206, United States.
| | - Lixin Yan
- Harbin Medical University Affiliated 2nd Hospital, 246 Xuefu Road, Harbin, 150086, China.
| | - Jiansong Tang
- Department of Technical Specialist, China Bioengineering Technology Group Limited, Unit 209,Building 16W, Hong Kong Science Park, Shatin, NT, HK, 999077, Hong Kong
| | - Qian Qian
- Department of Medicine, National Jewish Health, 1400 Jackson Street, Denver, CO, 80206, United States
| | - Jerica Lenberg
- Department of Medicine, National Jewish Health, 1400 Jackson Street, Denver, CO, 80206, United States; Augustana University, 2001 S Summit Avenue, Sioux Falls, SD, 571977, United States
| | - Dandan Zhu
- Department of Integrative Biology and Pharmacology, University of Texas Health Science Center, Houston, TX, 77030, United States
| | - Wan Liu
- Harbin Medical University Affiliated 2nd Hospital, 246 Xuefu Road, Harbin, 150086, China
| | - Kao Wu
- Glyn O. Philips Hydrocolloid Research Center at HUT, Hubei University of Technology, Wuhan 430068, China
| | - Yilin Wang
- University of California, Irvine. 100 Pacific, Irvine, CA, 92618, United States
| | - Shiqiang Lu
- AIDS Institute, Faculty of Medicine, The University of Hong Kong, No21 Sassoon Road, 999077, Hong Kong, Hong Kong.
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8
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Khass M, Schelonka RL, Liu CR, Elgavish A, Morel L, Burrows PD, Schroeder HW. Alterations in B cell development, CDR-H3 repertoire and dsDNA-binding antibody production among C57BL/6 ΔD-iD mice congenic for the lupus susceptibility loci sle1, sle2 or sle3. Autoimmunity 2017; 50:42-51. [PMID: 28166678 PMCID: PMC5551388 DOI: 10.1080/08916934.2016.1272597] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Revised: 11/11/2016] [Accepted: 11/24/2016] [Indexed: 10/20/2022]
Abstract
Systemic lupus erythematosus (SLE) is an autoimmune disease that reflects a failure to block the production of self-reactive antibodies, especially those that bind double-stranded DNA (dsDNA). Backcrossing the lupus-prone NZM2410 genome onto C57BL/6 led to the identification of three genomic intervals, termed sle1, sle2 and sle3, which are associated with lupus susceptibility. We previously generated a C57BL/6 strain congenic for an immunoglobulin DH locus (ΔD-iD) that enriches for arginine at dsDNA-binding positions. We individually introduced the ΔD-iD allele into the three sle strains to test whether one or more of these susceptibility loci could affect the developmental fate of B cells bearing arginine-enriched CDR-H3s, the CDR-H3 repertoire created by the DH and the prevalence of dsDNA-binding antibodies. We found that the combination of the ΔD-iD allele and the sle1 locus led to a decrease in mature, recirculating B cell numbers and an increase in marginal zone cell numbers while maintaining a highly charged CDR-H3 repertoire. ΔD-iD and sle2 had no effect on peripheral B cell numbers, but the CDR-H3 repertoire was partially normalized. ΔD-iD and sle3 led to an increase in marginal zone B cell numbers, with some normalization of hydrophobicity. Mice with ΔD-iD combined with either sle1 or sle3 had increased production of dsDNA-binding IgM and IgG by 12 months of age. These findings indicate that the peripheral CDR-H3 repertoire can be categorically manipulated by the effects of nonimmunoglobulin genes.
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Affiliation(s)
- Mohamed Khass
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL
- Genetic Engineering and Biotechnology division, National Research Center, Cairo, Egypt
| | - Robert L Schelonka
- Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL
| | - Cun Ren Liu
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL
| | - Ada Elgavish
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL
| | - Laurence Morel
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL
| | - Peter D Burrows
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL
| | - Harry W Schroeder
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL
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9
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Khass M, Blackburn T, Burrows PD, Walter MR, Capriotti E, Schroeder HW. VpreB serves as an invariant surrogate antigen for selecting immunoglobulin antigen-binding sites. Sci Immunol 2016; 1:aaf6628. [PMID: 28217764 PMCID: PMC5315267 DOI: 10.1126/sciimmunol.aaf6628] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
Abstract
Developmental checkpoints eliminate B cells synthesizing defective immunoglobulin heavy (HC) and light (LC) chains. The first checkpoint tests for formation of a VpreB/λ5/µHC-containing preB-cell receptor (preBCR) and predicts whether µHCs will bind conventional LCs to form membrane IgM. VpreB and λ5 also create a sensing site that interacts with µHC antigen-binding region CDR-H3, but whether it plays a role in immunoglobulin repertoire selection and function is unknown. On a position-by-position basis, we analyzed the amino acid content of CDR-H3s from H chains cloned from living and apoptotic preB cells and from IgG:Antigen structures. Using a panel of DH gene-targeted mice, we show that progressively reducing CDR-H3 tyrosine content increasingly impairs preBCR checkpoint passage. Counting from cysteine at Framework 3 position 96, we found that VpreB particularly selects for tyrosine at CDR-H3 position 101, and that Y101 also binds antigen in IgG:Antigen structures. VpreB thus acts as an early invariant antigen. It selects for particular CDR-H3 amino acids and shapes the specificity of the IgG humoral response. This helps explain why some neutralizing antibodies against pathogens are readily produced while others are rare.
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Affiliation(s)
- Mohamed Khass
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL
- Division of Genetic Engineering, National Research Center of Egypt, Cairo, Egypt
| | - Tessa Blackburn
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL
| | - Peter D Burrows
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL
| | - Mark R. Walter
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL
| | - Emidio Capriotti
- Department of Pathology, University of Alabama at Birmingham, Birmingham, AL
- Institute for Mathematical Modeling of Biological Systems, Department of Biology, University of Düsseldorf, Düsseldorf, Germany
| | - Harry W Schroeder
- Department of Medicine, University of Alabama at Birmingham, Birmingham, AL
- Department of Microbiology, University of Alabama at Birmingham, Birmingham, AL
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10
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Wang Y, Sundling C, Wilson R, O'Dell S, Chen Y, Dai K, Phad GE, Zhu J, Xiao Y, Mascola JR, Karlsson Hedestam GB, Wyatt RT, Li Y. High-Resolution Longitudinal Study of HIV-1 Env Vaccine-Elicited B Cell Responses to the Virus Primary Receptor Binding Site Reveals Affinity Maturation and Clonal Persistence. THE JOURNAL OF IMMUNOLOGY 2016; 196:3729-43. [PMID: 27001953 DOI: 10.4049/jimmunol.1502543] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Accepted: 03/01/2016] [Indexed: 01/01/2023]
Abstract
Because of the genetic variability of the HIV-1 envelope glycoproteins (Env), the elicitation of neutralizing Abs to conserved neutralization determinants including the primary receptor binding site, CD4 binding site (CD4bs), is a major focus of vaccine development. To gain insight into the evolution of Env-elicited Ab responses, we used single B cell analysis to interrogate the memory B cell Ig repertoires from two rhesus macaques after five serial immunizations with Env/adjuvant. We observed that the CD4bs-specific repertoire displayed unique features in the third CDR of Ig H chains with minor alterations along the immunization course. Progressive affinity maturation occurred as evidenced by elevated levels of somatic hypermutation (SHM) in Ab sequences isolated at the late immunization time point compared with the early time point. Abs with higher SHM were associated with increased binding affinity and virus neutralization capacity. Moreover, a notable portion of the CD4bs-specific repertoire was maintained between early and late immunization time points, suggesting that persistent clonal lineages were induced by Env vaccination. Furthermore, we found that the predominant persistent CD4bs-specific clonal lineages had larger population sizes and higher affinities than that from the rest of the repertoires, underscoring the critical role of Ag affinity selection in Ab maturation and clonal expansion. Genetic and functional analyses revealed that the accumulation of SHM in both framework regions and CDRs contributed to the clonal affinity and antigenicity evolution. Our longitudinal study provides high-resolution understanding of the dynamically evolving CD4bs-specific B cell response after Env immunization in primates.
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Affiliation(s)
- Yimeng Wang
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037; Institute for Bioscience and Biotechnology Research, University of Maryland, Rockville, MD 20850
| | - Christopher Sundling
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, SE-171 77 Stockholm, Sweden; Immunology Division, Garvan Institute of Medical Research, Darlinghurst, New South Wales 2010, Australia
| | - Richard Wilson
- International AIDS Vaccine Initiative Neutralizing Antibody Center at The Scripps Research Institute, La Jolla, CA 92037
| | - Sijy O'Dell
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - Yajing Chen
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037
| | - Kaifan Dai
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037
| | - Ganesh E Phad
- Department of Microbiology, Tumor and Cell Biology, Karolinska Institutet, SE-171 77 Stockholm, Sweden
| | - Jiang Zhu
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037; Scripps Center for HIV Vaccine Immunogen Discovery, La Jolla, CA 92037; and
| | - Yongli Xiao
- Laboratory of Infectious Diseases, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | - John R Mascola
- Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, Bethesda, MD 20892
| | | | - Richard T Wyatt
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037; International AIDS Vaccine Initiative Neutralizing Antibody Center at The Scripps Research Institute, La Jolla, CA 92037; Scripps Center for HIV Vaccine Immunogen Discovery, La Jolla, CA 92037; and
| | - Yuxing Li
- Department of Immunology and Microbial Science, The Scripps Research Institute, La Jolla, CA 92037; Institute for Bioscience and Biotechnology Research, University of Maryland, Rockville, MD 20850; International AIDS Vaccine Initiative Neutralizing Antibody Center at The Scripps Research Institute, La Jolla, CA 92037;
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