1
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Crowley AR, Richardson SI, Tuyishime M, Jennewein M, Bailey MJ, Lee J, Alter G, Ferrari G, Morris L, Ackerman ME. Functional consequences of allotypic polymorphisms in human immunoglobulin G subclasses. Immunogenetics 2023; 75:1-16. [PMID: 35904629 PMCID: PMC9845132 DOI: 10.1007/s00251-022-01272-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2022] [Accepted: 07/07/2022] [Indexed: 01/21/2023]
Abstract
Heritable polymorphisms within the human IgG locus, collectively termed allotypes, have often been linked by statistical associations, but rarely mechanistically, to a wide range of disease states. One potential explanation for these associations is that IgG allotype alters host cell receptors' affinity for IgG, dampening or enhancing an immune response depending on the nature of the change and the receptors. In this work, a panel of allotypic antibody variants were evaluated using multiplexed, label-free biophysical methods and cell-based functional assays to determine what effect, if any, human IgG polymorphisms have on antibody function. While we observed several differences in FcγR affinity among allotypes, there was little evidence of dramatically altered FcγR-based effector function or antigen recognition activity associated with this aspect of genetic variability.
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Affiliation(s)
- Andrew R Crowley
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Dartmouth College, Hanover, NH, USA
| | - Simone I Richardson
- Centre for HIV and STIs, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, 2131, Gauteng, South Africa
- MRC Antibody Immunity Research Unit, University of the Witwatersrand, Johannesburg, South Africa
| | - Marina Tuyishime
- Duke Human Vaccine Institute, Duke University Medical Center, Durham, NC, USA
| | | | - Meredith J Bailey
- Thayer School of Engineering, Dartmouth College, 14 Engineering Drive, Hanover, NH, 03755, USA
| | - Jiwon Lee
- Thayer School of Engineering, Dartmouth College, 14 Engineering Drive, Hanover, NH, 03755, USA
| | - Galit Alter
- Ragon Institute of MGH, MIT, and Harvard, Cambridge, MA, USA
| | - Guido Ferrari
- Duke Human Vaccine Institute, Duke University Medical Center, Durham, NC, USA
| | - Lynn Morris
- Centre for HIV and STIs, National Institute for Communicable Diseases of the National Health Laboratory Service, Johannesburg, 2131, Gauteng, South Africa
- MRC Antibody Immunity Research Unit, University of the Witwatersrand, Johannesburg, South Africa
| | - Margaret E Ackerman
- Department of Microbiology and Immunology, Geisel School of Medicine at Dartmouth, Dartmouth College, Hanover, NH, USA.
- Thayer School of Engineering, Dartmouth College, 14 Engineering Drive, Hanover, NH, 03755, USA.
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2
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Kljaković-Gašpić Batinjan M, Petrović T, Vučković F, Hadžibegović I, Radovani B, Jurin I, Đerek L, Huljev E, Markotić A, Lukšić I, Trbojević-Akmačić I, Lauc G, Gudelj I, Čivljak R. Differences in Immunoglobulin G Glycosylation Between Influenza and COVID-19 Patients. ENGINEERING (BEIJING, CHINA) 2022; 26:S2095-8099(22)00631-2. [PMID: 36093331 PMCID: PMC9446557 DOI: 10.1016/j.eng.2022.08.007] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Revised: 08/01/2022] [Accepted: 08/13/2022] [Indexed: 06/15/2023]
Abstract
The essential role of immunoglobulin G (IgG) in immune system regulation and combatting infectious diseases cannot be fully recognized without an understanding of the changes in its N-glycans attached to the asparagine 297 of the Fc domain that occur under such circumstances. These glycans impact the antibody stability, half-life, secretion, immunogenicity, and effector functions. Therefore, in this study, we analyzed and compared the total IgG glycome-at the level of individual glycan structures and derived glycosylation traits (sialylation, galactosylation, fucosylation, and bisecting N-acetylglucosamine (GlcNAc))-of 64 patients with influenza, 77 patients with coronavirus disease 2019 (COVID-19), and 56 healthy controls. Our study revealed a significant decrease in IgG galactosylation, sialylation, and bisecting GlcNAc (where the latter shows the most significant decrease) in deceased COVID-19 patients, whereas IgG fucosylation was increased. On the other hand, IgG galactosylation remained stable in influenza patients and COVID-19 survivors. IgG glycosylation in influenza patients was more time-dependent: In the first seven days of the disease, sialylation increased and fucosylation and bisecting GlcNAc decreased; in the next 21 days, sialylation decreased and fucosylation increased (while bisecting GlcNAc remained stable). The similarity of IgG glycosylation changes in COVID-19 survivors and influenza patients may be the consequence of an adequate immune response to enveloped viruses, while the observed changes in deceased COVID-19 patients may indicate its deviation.
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Affiliation(s)
| | - Tea Petrović
- Genos Glycoscience Research Laboratory, Zagreb 10000, Croatia
| | - Frano Vučković
- Genos Glycoscience Research Laboratory, Zagreb 10000, Croatia
| | - Irzal Hadžibegović
- Department of Cardiology, University Hospital Dubrava, Zagreb 10000, Croatia
- Faculty of Dental Medicine and Health, Josip Juraj Strossmayer University, Osijek 31000, Croatia
| | - Barbara Radovani
- Department of Biotechnology, University of Rijeka, Rijeka 51000, Croatia
| | - Ivana Jurin
- Department of Cardiology, University Hospital Dubrava, Zagreb 10000, Croatia
| | - Lovorka Đerek
- Department for Laboratory Diagnostics, University Hospital Dubrava, Zagreb 10000, Croatia
| | - Eva Huljev
- Department for Acute Respiratory Infections, University Hospital for Infectious Diseases "Dr. Fran Mihaljević", Zagreb 10000, Croatia
| | - Alemka Markotić
- Department for Urogenital Infections, University Hospital for Infectious Diseases "Dr. Fran Mihaljević", Zagreb 10000, Croatia
- Department for Infectious Diseases, School of Medicine, Catholic University of Croatia, 10000 Zagreb, Croatia
- Postdoctoral Study, Faculty of Medicine, University of Rijeka, Rijeka 51000, Croatia
| | - Ivica Lukšić
- Department of Maxillofacial Surgery, University of Zagreb School of Medicine, Dubrava University Hospital, Zagreb 10000, Croatia
| | | | - Gordan Lauc
- Genos Glycoscience Research Laboratory, Zagreb 10000, Croatia
- Faculty of Pharmacy and Biochemistry, University of Zagreb, Zagreb 10000, Croatia
| | - Ivan Gudelj
- Genos Glycoscience Research Laboratory, Zagreb 10000, Croatia
- Department of Biotechnology, University of Rijeka, Rijeka 51000, Croatia
| | - Rok Čivljak
- Department for Acute Respiratory Infections, University Hospital for Infectious Diseases "Dr. Fran Mihaljević", Zagreb 10000, Croatia
- Department of Infectious Diseases, University of Zagreb School of Medicine, Zagreb 10000, Croatia
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3
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Meibohm B. Knowledge Gaps in the Pharmacokinetics of Therapeutic Proteins in Pediatric Patients. Front Pharmacol 2022; 13:847021. [PMID: 35222051 PMCID: PMC8866711 DOI: 10.3389/fphar.2022.847021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Accepted: 01/24/2022] [Indexed: 01/04/2023] Open
Abstract
Therapeutic proteins such as monoclonal antibodies and their derivatives, fusions proteins, hormone analogs and enzymes for replacement therapy are an ever-growing mainstay in our pharmacopoeia. While a growing number of these medications are developed for and used in younger and younger pediatric patients, knowledge gaps in the basic understanding of the molecular and physiologic processes governing the disposition of these compounds in the human body and their modulation by age and childhood development are a hindrance to the effective and timely development and clinical use of these compounds, especially in very young pediatric patient populations. This is particularly the case for the widespread lack of information on the ontogeny and age-associated expression and function of receptor systems that are involved in the molecular processes driving the pharmacokinetics of these compounds. This article briefly highlights three receptor systems as examples, the neonatal Fc receptor, the asialoglycoprotein receptor, and the mannose receptor. It furthermore provides suggestions on how these gaps should be addressed and prioritized to provide the field of pediatric clinical pharmacology the urgently needed tools for a more effective development and clinical utilization of this important class of drugs with rapidly evolving importance as cornerstone in pediatric pharmacotherapy.
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4
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Momčilović A, de Haan N, Hipgrave Ederveen AL, Bondt A, Koeleman CAM, Falck D, de Neef LA, Mesker WE, Tollenaar R, de Ru A, van Veelen P, Wuhrer M, Dotz V. Simultaneous Immunoglobulin A and G Glycopeptide Profiling for High-Throughput Applications. Anal Chem 2020; 92:4518-4526. [PMID: 32091889 PMCID: PMC7252899 DOI: 10.1021/acs.analchem.9b05722] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
![]()
Immunoglobulin (Ig)
glycosylation is recognized for its influence
on Ig turnover and effector functions. However, the large-scale profiling
of Ig glycosylation in a biomedical setting is challenged by the existence
of different Ig isotypes and subclasses, their varying serum concentrations,
and the presence of multiple glycosylation sites per Ig. Here, a high-throughput
nanoliquid chromatography (LC)- mass spectrometry (MS)-based method
for simultaneous analysis of IgG and IgA glycopeptides was developed
and applied on a serum sample set from 185 healthy donors. Sample
preparation from minute amounts of serum was performed in 96-well
plate format. Prior to trypsin digestion, IgG and IgA were enriched
simultaneously, followed by a one-step denaturation, reduction, and
alkylation. The obtained nanoLC-MS data were subjected to semiautomated,
targeted feature integration and quality control. The combined and
simplified protocol displayed high overall method repeatability, as
assessed using pooled plasma and serum standards. Taking all samples
together, 143 individual N- and O-glycopeptides were reliably quantified. These glycopeptides were
attributable to 11 different peptide backbones, derived from IgG1,
IgG2/3, IgG4, IgA1, IgA2, and the joining chain from dimeric IgA.
Using this method, novel associations were found between IgA N- and O-glycosylation and age. Furthermore,
previously reported associations of IgG Fc glycosylation with age
in healthy individuals were confirmed. In conclusion, the new method
paves the way for high-throughput multiprotein plasma glycoproteomics.
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Affiliation(s)
- Ana Momčilović
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300RC Leiden, The Netherlands
| | - Noortje de Haan
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300RC Leiden, The Netherlands
| | - Agnes L Hipgrave Ederveen
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300RC Leiden, The Netherlands
| | - Albert Bondt
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300RC Leiden, The Netherlands
| | - Carolien A M Koeleman
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300RC Leiden, The Netherlands
| | - David Falck
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300RC Leiden, The Netherlands
| | - Louise A de Neef
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300RC Leiden, The Netherlands
| | - Wilma E Mesker
- Department of Surgery, Leiden University Medical Center, 2300RC Leiden, The Netherlands
| | - Rob Tollenaar
- Department of Surgery, Leiden University Medical Center, 2300RC Leiden, The Netherlands
| | - Arnoud de Ru
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300RC Leiden, The Netherlands
| | - Peter van Veelen
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300RC Leiden, The Netherlands
| | - Manfred Wuhrer
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300RC Leiden, The Netherlands
| | - Viktoria Dotz
- Center for Proteomics and Metabolomics, Leiden University Medical Center, 2300RC Leiden, The Netherlands
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5
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Temrikar ZH, Suryawanshi S, Meibohm B. Pharmacokinetics and Clinical Pharmacology of Monoclonal Antibodies in Pediatric Patients. Paediatr Drugs 2020; 22:199-216. [PMID: 32052309 PMCID: PMC7083806 DOI: 10.1007/s40272-020-00382-7] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Monoclonal antibodies (mAbs) and their derivatives are increasingly used in pediatric pharmacotherapy, and the number of antibody-based drug products with approved pediatric indications is continuously growing. In most instances, pediatric use is being pursued after the efficacy and safety of novel antibody medications have been established in adult indications. The pediatric extrapolation exercise that is frequently used in this context to bridge efficacy and safety from adults to children is oftentimes challenged through uncertainties and knowledge gaps in how to reliably extrapolate pharmacokinetics and clinical pharmacology of mAbs to different pediatric age groups, and how to derive age-appropriate dosing regimens that strike a balance between precision dosing and practicability. The article highlights some of the pharmacokinetic and clinical pharmacology challenges with regard to therapeutic use of mAbs and antibody derivatives in children, including immunogenicity events. Although considering body size-based differences in drug disposition can account for many of the perceived and actual differences in the distribution and elimination of antibody-based therapeutics between children and adults, increasing evidence suggests potential or actual age-associated differences beyond size differences, especially for young pediatric patients such as newborns and infants. To overcome age-associated differences in antibody disposition, various different dosing approaches have been applied to ensure safe and efficacious antibody exposure for pediatric populations of different ages. The development of such dosing regimens and the associated pathway to pediatric indication approval is illustrated in more detail for two antibody-based biologics, the fusion protein abatacept and the mAb tocilizumab.
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Affiliation(s)
- Zaid H. Temrikar
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Ave Room 435, Memphis, TN 38163 USA
| | - Satyendra Suryawanshi
- Clinical Pharmacology and Pharmacometrics, Bristol-Myers Squibb, Princeton, NJ 08540 USA
| | - Bernd Meibohm
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Tennessee Health Science Center, 881 Madison Ave Room 435, Memphis, TN, 38163, USA.
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6
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Chandler KB, Mehta N, Leon DR, Suscovich TJ, Alter G, Costello CE. Multi-isotype Glycoproteomic Characterization of Serum Antibody Heavy Chains Reveals Isotype- and Subclass-Specific N-Glycosylation Profiles. Mol Cell Proteomics 2019; 18:686-703. [PMID: 30659065 PMCID: PMC6442369 DOI: 10.1074/mcp.ra118.001185] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2018] [Revised: 01/16/2019] [Indexed: 01/16/2023] Open
Abstract
Antibodies are critical glycoproteins that bridge the innate and adaptive immune systems to provide protection against infection. The isotype/subclass of the antibody, the co-translational N-glycosylation on the CH2 domain, and the remodeling of the N-linked glycans during passage through the ER and Golgi are the known variables within the Fc domain that program antibody effector function. Through investigations of monoclonal therapeutics, it has been observed that addition or removal of specific monosaccharide residues from antibody N-glycans can influence the potency of antibodies, highlighting the importance of thoroughly characterizing antibody N-glycosylation. Although IgGs usually have a single N-glycosylation site and are well studied, other antibody isotypes, e.g. IgA and IgM, that are the first responders in certain diseases, have two to five sites/monomer of antibody, and little is known about their N-glycosylation. Here we employ a nLC-MS/MS method using stepped-energy higher energy collisional dissociation to characterize the N-glycan repertoire and site occupancy of circulating serum antibodies. We simultaneously determined the site-specific N-linked glycan repertoire for IgG1, IgG4, IgA1, IgA2, and IgM in individual healthy donors. Compared with IgG1, IgG4 displayed a higher relative abundance of G1S1F and a lower relative abundance of G1FB. IgA1 and IgA2 displayed mostly biantennary N-glycans. IgA2 variants with the either serine (S93) or proline (P93) were detected. In digests of the sera from a subset of donors, we detected an unmodified peptide containing a proline residue at position 93; this substitution would strongly disfavor N-glycosylation at N92. IgM sites N46, N209, and N272 displayed mostly complex glycans, whereas sites N279 and N439 displayed higher relative abundances of high-mannose glycoforms. This multi-isotype approach is a crucial step toward developing a platform to define disease-specific N-glycan signatures for different isotypes to help tune antibodies to induce protection. Data are available via ProteomeXchange with identifier PXD010911.
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Affiliation(s)
- Kevin Brown Chandler
- From the ‡Center for Biomedical Mass Spectrometry, Boston University School of Medicine, Boston, Massachusetts
| | - Nickita Mehta
- Ragon Institute of MGH, MIT and Harvard, Cambridge, Massachusetts
| | - Deborah R Leon
- From the ‡Center for Biomedical Mass Spectrometry, Boston University School of Medicine, Boston, Massachusetts
| | - Todd J Suscovich
- Ragon Institute of MGH, MIT and Harvard, Cambridge, Massachusetts
| | - Galit Alter
- Ragon Institute of MGH, MIT and Harvard, Cambridge, Massachusetts
| | - Catherine E Costello
- From the ‡Center for Biomedical Mass Spectrometry, Boston University School of Medicine, Boston, Massachusetts;.
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7
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KÜLHAŞ ÇELİK İ, CİVELEK E, METİN A, GİNİŞ T, TOYRAN M, DİBEK MISIRLIOĞLU E, KOCABAŞ CN. Comparison of reference systems in the assessment of age-related serum immunoglobulin levels in pediatric patients. Turk J Med Sci 2019; 49:147-152. [PMID: 30764591 PMCID: PMC7350840 DOI: 10.3906/sag-1805-220] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
Background/aim Ig level assessment is frequently used in the diagnosis and follow-up of immunodeficiency, as well as in studies investigating the prevalence of low serum Ig level in specific diseases.Material and methods: Patients who underwent Ig testing in the inpatient and outpatient clinics of our hospital in the years 2010–2016 were included. The Ig levels of the patients were assessed separately according to two reference systems commonly used in Turkey and another reference system used in the USA. Results A total of 20,138 patients (57.6% male) were included in the study. The median age of the patients was 55.7 months (interquartile range: 23.1–96.7). According to the reference intervals determined by Tezcan et al., 30.6% of the patients were deficient in one or more Ig values. This rate was 4 times higher than those based on the reference intervals determined by Aksu et al. (7.7%) and those in the Nelson Textbook of Pediatrics (6.8%). We also determined that the frequency of low Ig levels with three reference systems.Conclusion: In this study, we found that the rates of low Ig level in a group of pediatric patients differed significantly when evaluated using three different reference systems for age-related serum Ig levels
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Affiliation(s)
- İlknur KÜLHAŞ ÇELİK
- Ankara Child Health and Diseases Hematology Oncology Training and Research Hospital,Division of Pediatric Allergy and Immunology, University of Health Sciences, AnkaraTurkey
- * To whom correspondence should be addressed. E-mail:
| | - Ersoy CİVELEK
- Ankara Child Health and Diseases Hematology Oncology Training and Research Hospital,Division of Pediatric Allergy and Immunology, University of Health Sciences, AnkaraTurkey
| | - Ayşe METİN
- Ankara Child Health and Diseases Hematology Oncology Training and Research Hospital,Division of Pediatric Allergy and Immunology, University of Health Sciences, AnkaraTurkey
| | - Tayfur GİNİŞ
- Ankara Child Health and Diseases Hematology Oncology Training and Research Hospital,Division of Pediatric Allergy and Immunology, University of Health Sciences, AnkaraTurkey
| | - Müge TOYRAN
- Ankara Child Health and Diseases Hematology Oncology Training and Research Hospital,Division of Pediatric Allergy and Immunology, University of Health Sciences, AnkaraTurkey
| | - Emine DİBEK MISIRLIOĞLU
- Ankara Child Health and Diseases Hematology Oncology Training and Research Hospital,Division of Pediatric Allergy and Immunology, University of Health Sciences, AnkaraTurkey
| | - Can Naci KOCABAŞ
- Division of Pediatric Allergy and Immunology, Department of Children’s Health and Diseases,Faculty of Medicine, Muğla Sıtkı Koçman University, MuğlaTurkey
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8
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Gallaher J, Larripa K, Renardy M, Shtylla B, Tania N, White D, Wood K, Zhu L, Passey C, Robbins M, Bezman N, Shelat S, Jay Cho H, Moore H. Methods for determining key components in a mathematical model for tumor-immune dynamics in multiple myeloma. J Theor Biol 2018; 458:31-46. [PMID: 30172689 DOI: 10.1016/j.jtbi.2018.08.037] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2018] [Revised: 08/25/2018] [Accepted: 08/29/2018] [Indexed: 12/29/2022]
Abstract
In this work, we analyze a mathematical model we introduced previously for the dynamics of multiple myeloma and the immune system. We focus on four main aspects: (1) obtaining and justifying ranges and values for all parameters in the model; (2) determining a subset of parameters to which the model is most sensitive; (3) determining which parameters in this subset can be uniquely estimated given certain types of data; and (4) exploring the model numerically. Using global sensitivity analysis techniques, we found that the model is most sensitive to certain growth, loss, and efficacy parameters. This analysis provides the foundation for a future application of the model: prediction of optimal combination regimens in patients with multiple myeloma.
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Affiliation(s)
| | - Kamila Larripa
- Department of Mathematics, Humboldt State University, Arcata, CA 95521, USA.
| | - Marissa Renardy
- Department of Mathematics, The Ohio State University, Columbus, OH 43210, USA; Current affiliation: Department of Microbiology and Immunology, University of Michigan, Ann Arbor, MI 48109, USA.
| | - Blerta Shtylla
- Mathematics Department, Pomona College, Claremont, CA 91711, USA.
| | - Nessy Tania
- Department of Mathematics and Statistics, Smith College, Northampton, MA 01063,USA.
| | - Diana White
- Department of Mathematics, Clarkson University, Potsdam, NY 13699, USA.
| | - Karen Wood
- Department of Mathematics, University of California at Irvine, Irvine, CA 92697, USA; Current affiliation: The Aerospace Corporation, El Segundo, CA 90245, USA.
| | - Li Zhu
- Clinical Pharmacology and Pharmacometrics, Bristol-Myers Squibb, Princeton, NJ 08543, USA.
| | - Chaitali Passey
- Clinical Pharmacology and Pharmacometrics, Bristol-Myers Squibb, Princeton, NJ 08543, USA; Current affiliation: Genmab, Monmouth Junction, NJ 08852, USA
| | - Michael Robbins
- Hematology Medical Strategy, Bristol-Myers Squibb, Lawrence Township, NJ 08648, USA.
| | - Natalie Bezman
- Immuno-Oncology Discovery, Bristol-Myers Squibb, Redwood City, CA 94063, USA.
| | - Suresh Shelat
- Oncology Clinical Development, Bristol-Myers Squibb, Lawrence Township, NJ 08648, USA.
| | - Hearn Jay Cho
- Tisch Cancer Institute, Mt. Sinai School of Medicine, New York, NY 10029, USA.
| | - Helen Moore
- Bristol-Myers Squibb, Princeton, NJ 08543, USA; Current affiliation: AstraZeneca, Waltham, MA 02451, USA.
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9
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Cao MZ, Wu YH, Wen SM, Pan YC, Wang C, Kong F, Wang C, Niu JQ, Li J, Jiang J. Mitogen-activated protein kinase eight polymorphisms are associated with immune responsiveness to HBV vaccinations in infants of HBsAg(+)/HBeAg(-) mothers. BMC Infect Dis 2018; 18:274. [PMID: 29898681 PMCID: PMC6000919 DOI: 10.1186/s12879-018-3166-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2018] [Accepted: 05/25/2018] [Indexed: 01/15/2023] Open
Abstract
BACKGROUND Infants born to hepatitis B surface antigen (HBsAg) positive mothers are at a higher risk for Hepatitis B virus (HBV) infection. Host genetic background plays an important role in determining the strength of immune response to vaccination. We conducted this study to investigate the association between Tumor necrosis factor (TNF) and Mitogen-activated protein kinase eight (MAPK8) polymorphisms and low response to hepatitis B vaccines. METHODS A total of 753 infants of HBsAg positive and hepatitis Be antigen (HBeAg) negative mothers from the prevention of mother-to-infant transmission of HBV cohort were included. Five tag single nucleotide polymorphism (SNPs) (rs1799964, rs1800629, rs3093671, rs769177 and rs769178) in TNF and two tag SNPs (rs17780725 and rs3827680) in MAPK8 were genotyped using the MassARRAY platform. RESULTS A higher percentage of breastfeeding (P = 0.013) and a higher level of Ab titers were observed in high responders (P < 0.001). The MAPK8 rs17780725 AA genotype increased the risk of low response to hepatitis B vaccines (OR = 3.176, 95% CI: 1.137-8.869). Additionally, subjects with the AA genotype may have a lower Ab titer than subjects with GA or GG genotypes (P = 0.051). Compared to infants who were breastfed, infants who were not breastfed had an increased risk of low response to hepatitis B vaccine (OR = 2.901, 95% CI:1.306-6.441). CONCLUSIONS MAPK8 polymorphisms are associated with immune response to HBV vaccinations in infants of HBsAg(+)/HBeAg(-) mothers.
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Affiliation(s)
- Meng Zhuo Cao
- Department of Microbiology and Infectious Disease Center, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100020, China.,Division of Education, Beijing Jishuitan Hospital, Beijing, 100020, China
| | - Yan Hua Wu
- Division of Clinical Research, The First Hospital of Jilin University, Changchun, 130021, Jilin, China
| | - Si Min Wen
- Division of Clinical Research, The First Hospital of Jilin University, Changchun, 130021, Jilin, China
| | - Yu Chen Pan
- Division of Clinical Research, The First Hospital of Jilin University, Changchun, 130021, Jilin, China
| | - Chong Wang
- Department of Hepatology, The First Hospital of Jilin University, Changchun, 130021, Jilin, China
| | - Fei Kong
- Department of Hepatology, The First Hospital of Jilin University, Changchun, 130021, Jilin, China
| | - Chuan Wang
- Division of Clinical Research, The First Hospital of Jilin University, Changchun, 130021, Jilin, China.,Maternal and Child Health Center of Chaoyang District, Beijing, 100020, China
| | - Jun Qi Niu
- Department of Hepatology, The First Hospital of Jilin University, Changchun, 130021, Jilin, China.
| | - Jie Li
- Department of Microbiology and Infectious Disease Center, School of Basic Medical Sciences, Peking University Health Science Center, Beijing, 100020, China.
| | - Jing Jiang
- Division of Clinical Research, The First Hospital of Jilin University, Changchun, 130021, Jilin, China.
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10
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Blanco E, Pérez-Andrés M, Arriba-Méndez S, Contreras-Sanfeliciano T, Criado I, Pelak O, Serra-Caetano A, Romero A, Puig N, Remesal A, Torres Canizales J, López-Granados E, Kalina T, Sousa AE, van Zelm M, van der Burg M, van Dongen JJ, Orfao A. Age-associated distribution of normal B-cell and plasma cell subsets in peripheral blood. J Allergy Clin Immunol 2018; 141:2208-2219.e16. [DOI: 10.1016/j.jaci.2018.02.017] [Citation(s) in RCA: 122] [Impact Index Per Article: 20.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2017] [Revised: 12/15/2017] [Accepted: 02/05/2018] [Indexed: 01/12/2023]
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11
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Donadieu J, Lamant M, Fieschi C, de Fontbrune FS, Caye A, Ouachee M, Beaupain B, Bustamante J, Poirel HA, Isidor B, Van Den Neste E, Neel A, Nimubona S, Toutain F, Barlogis V, Schleinitz N, Leblanc T, Rohrlich P, Suarez F, Ranta D, Chahla WA, Bruno B, Terriou L, Francois S, Lioure B, Ahle G, Bachelerie F, Preudhomme C, Delabesse E, Cave H, Bellanné-Chantelot C, Pasquet M. Natural history of GATA2 deficiency in a survey of 79 French and Belgian patients. Haematologica 2018; 103:1278-1287. [PMID: 29724903 PMCID: PMC6068047 DOI: 10.3324/haematol.2017.181909] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2017] [Accepted: 04/27/2018] [Indexed: 12/18/2022] Open
Abstract
Heterozygous germline GATA2 mutations strongly predispose to leukemia, immunodeficiency, and/or lymphoedema. We describe a series of 79 patients (53 families) diagnosed since 2011, made up of all patients in France and Belgium, with a follow up of 2249 patients/years. Median age at first clinical symptoms was 18.6 years (range, 0-61 years). Severe infectious diseases (mycobacteria, fungus, and human papilloma virus) and hematologic malignancies were the most common first manifestations. The probability of remaining symptom-free was 8% at 40 years old. Among the 53 probands, 24 had missense mutations including 4 recurrent alleles, 21 had nonsense or frameshift mutations, 4 had a whole-gene deletion, 2 had splice defects, and 2 patients had complex mutations. There were significantly more cases of leukemia in patients with missense mutations (n=14 of 34) than in patients with nonsense or frameshift mutations (n=2 of 28). We also identify new features of the disease: acute lymphoblastic leukemia, juvenile myelomonocytic leukemia, fatal progressive multifocal leukoencephalopathy related to the JC virus, and immune/inflammatory diseases. A revised International Prognostic Scoring System (IPSS) score allowed a distinction to be made between a stable disease and hematologic transformation. Chemotherapy is of limited efficacy, and has a high toxicity with severe infectious complications. As the mortality rate is high in our cohort (up to 35% at the age of 40), hematopoietic stem cell transplantation (HSCT) remains the best choice of treatment to avoid severe infectious and/or hematologic complications. The timing of HSCT remains difficult to determine, but the earlier it is performed, the better the outcome.
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Affiliation(s)
- Jean Donadieu
- Department of Paediatric Haematology and Oncology, Registre National des Neutropénies Chroniques, AP-HP Trousseau Hospital, Paris, France
| | - Marie Lamant
- Department of Paediatric Haematology and Immunology, CHU Toulouse, France
| | - Claire Fieschi
- Department of Clinical Immunology Assistance Publique - Hôpitaux de Paris (AP-HP) Saint-Louis Hospital, France.,INSERM UMR1126, Centre Hayem, Université Paris Denis Diderot, Sorbonne Paris Cité, France
| | - Flore Sicre de Fontbrune
- Department of Haematology and Bone Marrow Transplantation, AP-HP Saint-Louis Hospital, Paris, France
| | - Aurélie Caye
- Genetic Laboratory, AP-HP Robert Debré Hospital, Paris, France
| | - Marie Ouachee
- Department of Haematology, AP-HP Robert Debré Hospital, Paris, France
| | - Blandine Beaupain
- French Neutropenia Registry, AP-HP Trousseau Hospital, Paris, France
| | - Jacinta Bustamante
- Laboratory of Human Genetics of Infectious Diseases, Necker Branch, INSERM UMR 1163, Necker-Enfants Malades Hospital, Paris, France.,Centre for the Study of Primary Immunodeficiencies, Necker-Enfants Malades Hospital, AP-HP, Paris, France.,St Giles Laboratory of Human Genetics of Infectious Diseases, Rockefeller Branch, New York, NY, USA.,Paris Descartes University, Imagine Institute, Paris, France
| | - Hélène A Poirel
- Centre for Human Genetics, Cliniques Universitaires Saint-Luc & Human Molecular Genetics (GEHU), de Duve Institute -Université Catholique de Louvain, Brussels, Belgium
| | | | | | - Antoine Neel
- Department of Internal Medicine, CHU Nantes, France
| | | | - Fabienne Toutain
- Department of Paediatric Haematology and Oncology, CHU de Rennes, France
| | - Vincent Barlogis
- Department of Paediatric Haematology, CHU de Marseille, Hopital La Timone, Université Aix-Marseille, France
| | - Nicolas Schleinitz
- Internal Medicine, CHU de Marseille, Hopital La Timone, Université Aix-Marseille, France
| | - Thierry Leblanc
- Department of Haematology, AP-HP Robert Debré Hospital, Paris, France
| | | | - Felipe Suarez
- Department of Haematology, AP-HP Necker-Enfants Malades, INSERM UMR 1163 and CNRS ERL 8254 Institut Imagine, Sorbonne Paris Cité, Université Paris Descartes, France
| | - Dana Ranta
- Department of Haematology, CHU de Nancy, France
| | | | | | - Louis Terriou
- Department of Internal Medicine and Immunology, CHU Lille, France
| | | | - Bruno Lioure
- Department of Haematology, CHU de Strasbourg, France
| | - Guido Ahle
- Department of Neurology, Hôpitaux Civils de Colmar, France
| | - Françoise Bachelerie
- Inflammation Chimiokines et Immunopathologie, INSERM, Faculté de Médecine, Université Paris-Sud, Université Paris-Saclay, Clamart, France
| | | | - Eric Delabesse
- Laboratory of Haematology, IUCT-Oncopole, Toulouse, France.,Centre of Research in Oncology, INSERM U1037, Team 16, IUCT-Oncopole, Toulouse, France
| | - Hélène Cave
- Genetic Laboratory, AP-HP Robert Debré Hospital, Paris, France
| | - Christine Bellanné-Chantelot
- Department of Genetics, AP-HP Pitié Salpêtrière Hospital, Faculté de Médecine Sorbonne Université, Paris, France
| | - Marlène Pasquet
- Department of Paediatric Haematology and Immunology, CHU Toulouse, France .,Centre of Research in Oncology, INSERM U1037, Team 16, IUCT-Oncopole, Toulouse, France
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12
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A reference interval for serum IgG subclasses in Chinese children. PLoS One 2018; 13:e0192923. [PMID: 29505563 PMCID: PMC5837086 DOI: 10.1371/journal.pone.0192923] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 01/12/2018] [Indexed: 11/19/2022] Open
Abstract
Background Reference intervals (RIs) for serum IgG subclasses vary greatly among different geographical regions. The present study aimed to establish RIs for serum IgG subclasses in Chinese children, which is essential for interpretation of laboratory findings and making clinical decisions. Methods This study was performed in accordance with guideline C28-A3, proposed by the International Federation of Clinical Chemistry and the Clinical and Laboratory Standards Institute. In total, 607 apparently healthy Chinese children were enrolled, and serum levels of IgG subclasses were measured. Individuals were stratified by age and the RIs were determined through statistical analysis. Results Following were the median values of RIs for serum IgG subclasses in Chinese children: IgG1, 2.78 g/L; IgG2, 0.85 g/L; IgG3, 0.13 g/L; IgG4, 0.06 g/L at 1–6 months of age; IgG1, 3.64 g/L; IgG2, 0.73 g/L; IgG3, 0.19 g/L; IgG4, 0.03 g/L at 6–12 months of age; IgG1, 5.15 g/L; IgG2, 0.87 g/L; IgG3, 0.19 g/L; IgG4, 0.07 g/L at 1–2 years of age; IgG1, 5.26 g/L; IgG2, 1.23 g/L; IgG3, 0.14 g/L; IgG4, 0.11 g/L at 2–3 years of age; IgG1, 6.33 g/L; IgG2, 1.8 g/L; IgG3, 0.2 g/L; IgG4, 0.21 g/L at age 3–4 years; IgG1, 7.05 g/L; IgG2, 1.87 g/L; IgG3, 0.25 g/L; IgG4, 0.29 g/L at 4–6 years of age; IgG1, 6.19 g/L; IgG2, 1.93 g/L; IgG3, 0.2 g/L; IgG4, 0.28 g/L at 6–9 years of age; IgG1, 6.76 g/L; IgG2, 2.29 g/L; IgG3, 0.27 g/L; IgG4, 0.37 g/L at 10–12 years of age; IgG1, 7.45 g/L; IgG2, 2.92 g/L; IgG3, 0.28 g/L; IgG4, 0.38 g/L at 13–16 years of age. Conclusion To our knowledge, this study is the first to establish RIs for serum IgG subclasses exclusively in Chinese children.
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13
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Fonseca W, Lukacs NW, Ptaschinski C. Factors Affecting the Immunity to Respiratory Syncytial Virus: From Epigenetics to Microbiome. Front Immunol 2018. [PMID: 29515570 PMCID: PMC5825926 DOI: 10.3389/fimmu.2018.00226] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
Respiratory syncytial virus (RSV) is a common pathogen that infects virtually all children by 2 years of age and is the leading cause of hospitalization of infants worldwide. While most children experience mild symptoms, some children progress to severe lower respiratory tract infection. Those children with severe disease have a much higher risk of developing childhood wheezing later in life. Many risk factors are known to result in exacerbated disease, including premature birth and early age of RSV infection, when the immune system is relatively immature. The development of the immune system before and after birth may be altered by several extrinsic and intrinsic factors that could lead to severe disease predisposition in children who do not exhibit any currently known risk factors. Recently, the role of the microbiome and the resulting metabolite profile has been an area of intense study in the development of lung disease, including viral infection and asthma. This review explores both known risk factors that can lead to severe RSV-induced disease as well as emerging topics in the development of immunity to RSV and the long-term consequences of severe infection.
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Affiliation(s)
- Wendy Fonseca
- Department of Pathology, University of Michigan, Ann Arbor, MI, United States
| | - Nicholas W Lukacs
- Department of Pathology, University of Michigan, Ann Arbor, MI, United States.,University of Michigan, Mary H. Weiser Food Allergy Center, Ann Arbor, MI, United States
| | - Catherine Ptaschinski
- Department of Pathology, University of Michigan, Ann Arbor, MI, United States.,University of Michigan, Mary H. Weiser Food Allergy Center, Ann Arbor, MI, United States
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14
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Li P, Liu Z, Wu Z, Wen X, Li L, Zhang S, Xu Y, Li Y. Adult reference intervals for IgG subclasses with Siemens immunonephelometric assays in Chinese population. Allergy Asthma Clin Immunol 2017; 13:44. [PMID: 29042863 PMCID: PMC5629794 DOI: 10.1186/s13223-017-0216-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 09/25/2017] [Indexed: 02/05/2023] Open
Abstract
Objective To determine the adult reference intervals for the Siemens IgG subclass reagents. Methods 636 blood samples of healthy adults were analyzed to determine the level of IgG subclass using the reagents of Siemens immunonephelometric assay with molecular biology kits. Results IgGSc reference intervals were as follows: IgG1 4.45–9.76 g/L, IgG2 2.07–8.57 g/L, IgG3 0.08–0.80 g/L and IgG4 0.05–1.54 g/L. There was an excellent correlation between the total IgG and the sum of the IgG subclasses. No significant gender and age differences were observed. Conclusions Our data provide the missing reference intervals and enable the use of the nephelometric IgG subclass reagents in Chinese. The study can offer reference on clinic diagnose.
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Affiliation(s)
- Ping Li
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing, 100730 China
| | - Zhongjuan Liu
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, 100730 China
| | - Ziyan Wu
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing, 100730 China
| | - Xiaoting Wen
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing, 100730 China
| | - Liubing Li
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing, 100730 China
| | - Shulan Zhang
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing, 100730 China
| | - Yingchun Xu
- Department of Clinical Laboratory, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, 100730 China
| | - Yongzhe Li
- Department of Rheumatology and Clinical Immunology, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Key Laboratory of Rheumatology and Clinical Immunology, Ministry of Education, Beijing, 100730 China
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15
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Scarselli A, Di Cesare S, Di Matteo G, De Matteis A, Ariganello P, Romiti ML, Cascioli S, De Vito R, Bertaina A, Locatelli F, Gaspar HB, Aiuti A, Rossi P, Gilmour K, Cancrini C. Combined immunodeficiency due to JAK3 mutation in a child presenting with skin granuloma. J Allergy Clin Immunol 2015; 137:948-51.e5. [PMID: 26545580 DOI: 10.1016/j.jaci.2015.09.017] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2015] [Revised: 09/15/2015] [Accepted: 09/21/2015] [Indexed: 10/22/2022]
Affiliation(s)
- Alessia Scarselli
- University Department of Pediatrics, DPUO, Unit of Immune and Infectious Diseases, Bambino Gesù Children's Hospital, Rome, Italy.
| | - Silvia Di Cesare
- University Department of Pediatrics, DPUO, Unit of Immune and Infectious Diseases, Bambino Gesù Children's Hospital, Rome, Italy
| | - Gigliola Di Matteo
- University Department of Pediatrics, DPUO, Unit of Immune and Infectious Diseases, Bambino Gesù Children's Hospital, Rome, Italy
| | - Arianna De Matteis
- University Department of Pediatrics, DPUO, Unit of Immune and Infectious Diseases, Bambino Gesù Children's Hospital, Rome, Italy
| | - Paola Ariganello
- University Department of Pediatrics, DPUO, Unit of Immune and Infectious Diseases, Bambino Gesù Children's Hospital, Rome, Italy
| | - Maria Luisa Romiti
- University Department of Pediatrics, DPUO, Unit of Immune and Infectious Diseases, Bambino Gesù Children's Hospital, Rome, Italy
| | - Simona Cascioli
- Immunology and Pharmacotherapy Area, Bambino Gesù Children's Hospital, Rome, Italy
| | - Rita De Vito
- Department of Pathology, Bambino Gesù Children's Hospital, Rome, Italy
| | - Alice Bertaina
- Department of Pediatric Hematology and Oncology, Bambino Gesù Children's Hospital, Rome, Italy
| | - Franco Locatelli
- Department of Pediatric Hematology and Oncology, Bambino Gesù Children's Hospital, Rome, Italy
| | - H Bobby Gaspar
- Centre for Immunodeficiency, Molecular Immunology Unit, UCL Institute of Child Health, London, United Kingdom
| | - Alessandro Aiuti
- University Department of Pediatrics, DPUO, Unit of Immune and Infectious Diseases, Bambino Gesù Children's Hospital, Rome, Italy; San Raffaele Telethon Institute for Gene Therapy (HSR-TIGET), Scientific Institute HS Raffaele, Milan, Italy
| | - Paolo Rossi
- University Department of Pediatrics, DPUO, Unit of Immune and Infectious Diseases, Bambino Gesù Children's Hospital, Rome, Italy
| | - Kimberly Gilmour
- Great Ormond Street Hospital for Children NHS Foundation Trust, London, United Kingdom
| | - Caterina Cancrini
- University Department of Pediatrics, DPUO, Unit of Immune and Infectious Diseases, Bambino Gesù Children's Hospital, Rome, Italy.
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16
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Normalized immunoglobulin patterns in adults with recurrent acute otitis media and low IgG2 levels during early childhood. Int J Pediatr Otorhinolaryngol 2014; 78:1153-7. [PMID: 24837869 DOI: 10.1016/j.ijporl.2014.04.039] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2013] [Revised: 02/10/2014] [Accepted: 04/10/2014] [Indexed: 12/14/2022]
Abstract
OBJECTIVES Children who suffer from recurrent acute otitis media (rAOM) sometimes display low immunoglobulin levels. It is not known whether the differences in immunoglobulin levels remain during adulthood or if rAOM-patients have more episodes of AOM and airway infections as adults. METHODS A study on adults, with a history of rAOM during childhood, was performed. The immunologic status and individual disposition for upper airway infections were evaluated in 28 subjects who originally participated in a study on rAOM between 1979 and 1983. 13 subjects had suffered from rAOM during early childhood and 15 subjects without rAOM served as a control group. The study included analysis of immunoglobulins in serum and self evaluation regarding susceptibility to infections of the upper airway. RESULTS There was no difference between the groups neither regarding IgG2 concentrations nor specific antibody levels. No episodes of AOM were reported after 20 years of age in any of the study subjects. The history of airway infections was similar in both groups. CONCLUSIONS Study subjects who had rAOM combined with low IgG2 levels during childhood had a normalized immunoglobulin pattern as adults.
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17
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Thuy TT, Thorsén G. Glycosylation profiling of therapeutic antibodies in serum samples using a microfluidic CD platform and MALDI-MS. JOURNAL OF THE AMERICAN SOCIETY FOR MASS SPECTROMETRY 2013; 24:1053-1063. [PMID: 23633012 DOI: 10.1007/s13361-013-0623-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 03/10/2013] [Accepted: 03/11/2013] [Indexed: 06/02/2023]
Abstract
The serum clearance rate of therapeutic antibodies is important as it affects the clinical efficacy, required dose, and dose frequency. The glycosylation of antibodies has in some studies been shown to have an impact on the elimination rates in vivo. Monitoring changes to the glycan profiles in pharmacokinetics studies can reveal whether the clearance rates of the therapeutic antibodies depend on the different glycoforms, thereby providing useful information for improvement of the drugs. In this paper, a novel method for glycosylation analysis of therapeutic antibodies in serum samples is presented. A microfluidic compact-disc (CD) platform in combination with MALDI-MS was used to monitor changes to the glycosylation profiles of samples incubated in vitro. Antibodies were selectively purified from serum using immunoaffinity capture on immobilized target antigens. The glycans were enzymatically released, purified, and finally analyzed by MALDI-TOF-MS. To simulate changes to glycan profiles after administration in vivo, a therapeutic antibody was incubated in serum with the enzyme α1-2,3 mannosidase to artificially reduce the amount of the high mannose glycoforms. Glycan profiles were monitored at specific intervals during the incubation. The relative abundance of the high mannose 5 glycoform was clearly found to decrease and, simultaneously, that of high mannose 4 increased over the incubation period. The method can be performed in a rapid, parallel, and automated fashion for glycosylation profiling consuming low amounts of samples and reagents. This can contribute to less labor work and reduced cost of the studies of therapeutic antibodies glycosylation in vitro and in vivo.
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MESH Headings
- Antibodies, Monoclonal/blood
- Antibodies, Monoclonal/chemistry
- Antibodies, Monoclonal/therapeutic use
- Antibodies, Monoclonal, Humanized/blood
- Antibodies, Monoclonal, Humanized/chemistry
- Antibodies, Monoclonal, Humanized/therapeutic use
- Antigens/chemistry
- Bevacizumab
- Cetuximab
- Glycosylation
- Humans
- Infliximab
- Microfluidic Analytical Techniques
- Molecular Structure
- Polysaccharides/chemistry
- Spectrometry, Mass, Matrix-Assisted Laser Desorption-Ionization/methods
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Affiliation(s)
- Tran Thi Thuy
- Department of Analytical Chemistry, Stockholm University, 10691, Stockholm, Sweden
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18
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Funakoshi T, Lunardon L, Ellebrecht CT, Nagler AR, O'Leary CE, Payne AS. Enrichment of total serum IgG4 in patients with pemphigus. Br J Dermatol 2012; 167:1245-53. [PMID: 22803659 DOI: 10.1111/j.1365-2133.2012.11144.x] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND Pemphigus vulgaris (PV) and pemphigus foliaceus (PF) are potentially fatal blistering diseases caused by autoantibodies targeting desmoglein (Dsg) adhesion proteins. Previous studies have shown an IgG4 > IgG1 predominance of anti-Dsg antibodies in pemphigus; however, no studies have examined total serum IgG4 levels in pemphigus. IgG4 is induced by chronic antigen stimulation, which could occur with persistent skin blistering and potentially elevate the total serum IgG4 relative to other IgG subclasses in patients with pemphigus. OBJECTIVES The primary aim of the study was to quantitate total and Dsg-specific IgG subclasses in patients with pemphigus. METHODS IgG subclasses and Dsg-specific IgG1 and IgG4 were quantitated in patients with PV and PF, and in sera from age-matched controls using a subclass enzyme-linked immunosorbent assay. The effectiveness of IgG4 depletion in blocking IgG pathogenicity in PV was determined using a keratinocyte dissociation assay. RESULTS Dsg-specific antibodies comprised a median of 7·1% and 4·2% of total IgG4 in patients with PV and PF, respectively, with eightfold and fourfold enrichment in IgG4 vs. IgG1. Total serum IgG4, but not other IgG subclasses, was enriched in patients with PV and PF compared with age-matched controls (P = 0·004 and P = 0·005, respectively). IgG4 depletion of PV sera reduced pathogenicity in a keratinocyte dissociation assay and showed that affinity-purified IgG4 is more pathogenic than other serum IgG fractions. CONCLUSIONS Dsg-specific autoantibodies are significantly enriched in IgG4, which may explain the enrichment of total serum IgG4 in some patients with pemphigus. By preferentially targeting autoimmune rather than beneficial immune antibodies, IgG4-targeted therapies may offer safer treatment options for pemphigus.
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Affiliation(s)
- T Funakoshi
- Department of Dermatology, University of Pennsylvania, Philadelphia, PA, USA.
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19
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Donadieu J, Fenneteau O, Beaupain B, Beaufils S, Bellanger F, Mahlaoui N, Lambilliotte A, Aladjidi N, Bertrand Y, Mialou V, Perot C, Michel G, Fouyssac F, Paillard C, Gandemer V, Boutard P, Schmitz J, Morali A, Leblanc T, Bellanné-Chantelot C. Classification of and risk factors for hematologic complications in a French national cohort of 102 patients with Shwachman-Diamond syndrome. Haematologica 2012; 97:1312-9. [PMID: 22491737 DOI: 10.3324/haematol.2011.057489] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Patients with the Shwachman-Diamond syndrome often develop hematologic complications. No risk factors for these complications have so far been identified. The aim of this study was to classify the hematologic complications occurring in patients with Shwachman-Diamond syndrome and to investigate the risk factors for these complications. DESIGN AND METHODS One hundred and two patients with Shwachman-Diamond syndrome, with a median follow-up of 11.6 years, were studied. Major hematologic complications were considered in the case of definitive severe cytopenia (i.e. anemia <7 g/dL or thrombocytopenia <20 × 10(9)/L), classified as malignant (myelodysplasia/leukemia) according to the 2008 World Health Organization classification or as non-malignant. RESULTS Severe cytopenia was observed in 21 patients and classified as malignant severe cytopenia (n=9), non-malignant severe cytopenia (n=9) and malignant severe cytopenia preceded by non-malignant severe cytopenia (n=3). The 20-year cumulative risk of severe cytopenia was 24.3% (95% confidence interval: 15.3%-38.5%). Young age at first symptoms (<3 months) and low hematologic parameters both at diagnosis of the disease and during the follow-up were associated with severe hematologic complications (P<0.001). Fifteen novel SBDS mutations were identified. Genotype analysis showed no discernible prognostic value. CONCLUSIONS Patients with Shwachman-Diamond syndrome with very early symptoms or cytopenia at diagnosis (even mild anemia or thrombocytopenia) should be considered at a high risk of severe hematologic complications, malignant or non-malignant. Transient severe cytopenia or an indolent cytogenetic clone had no deleterious value.
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Affiliation(s)
- Jean Donadieu
- AP-HP Registre Français des Neutropénies Congénitales, Hôpital Trousseau, Service d’Hémato-oncologie Pédiatrique, APHP, Paris, France.
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20
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Selman MH, Derks RJ, Bondt A, Palmblad M, Schoenmaker B, Koeleman CA, van de Geijn FE, Dolhain RJ, Deelder AM, Wuhrer M. Fc specific IgG glycosylation profiling by robust nano-reverse phase HPLC-MS using a sheath-flow ESI sprayer interface. J Proteomics 2012; 75:1318-29. [DOI: 10.1016/j.jprot.2011.11.003] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Revised: 10/31/2011] [Accepted: 11/05/2011] [Indexed: 12/16/2022]
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21
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Lessons learned from phagocytic function studies in a large cohort of patients with recurrent infections. J Clin Immunol 2011; 32:454-66. [PMID: 22207252 DOI: 10.1007/s10875-011-9633-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Accepted: 12/04/2011] [Indexed: 10/14/2022]
Abstract
BACKGROUND There is a paucity of data on the relationship between demographic characteristics, specific clinical manifestations, and neutrophil dysfunction, guiding physicians to decide which clinical signs and symptoms are a code for an underlying phagocytic disorder. METHODS The data over a 21-year period of all adult and pediatric patients referred to our Laboratory for Leukocyte Functions with recurrent pyogenic infections were analyzed. Neutrophil function studies included chemotaxis, superoxide production (SOP), bactericidal activity (BA), and specific studies in case of suspected primary phagocytic disorder (PPD). RESULTS Neutrophil dysfunction was found in 33.6% of 998 patients; chemotaxis in 16.6%, SOP in 6%, and BA in 24.5%. The younger the patient and the more organ systems involved, the greater the probability of finding phagocytic impairment. Impaired chemotaxis correlated with recurrent aphthous stomatitis, infections associated with elevated IgE, and purulent upper respiratory tract infections. Impaired SOP and BA correlated with deep-seated abscesses, recurrent lymphadenitis, sepsis, and bone and joint and central nervous system infections. PPDs were identified in 5.7%, chronic granulomatous disease in 4.8%, neutrophil glucose-6-phosphate dehydrogenase deficiency in 0.3%, leukocyte adhesion deficiency type 1 in 0.4%, and myeloperoxidase deficiency in 0.2%. Phagocytic evaluation contributed to the diagnosis of hyperimmunoglobulin-E syndrome (n = 21) and Chediak-Higashi syndrome (n = 3). CONCLUSIONS PPDs are identified in 5.7% of patients with recurrent pyogenic infections; in the remainder, phagocytic dysfunction may be related to deleterious effects of persistent infection, drug consumption, or disorders not yet established.
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22
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Selman MHJ, de Jong SE, Soonawala D, Kroon FP, Adegnika AA, Deelder AM, Hokke CH, Yazdanbakhsh M, Wuhrer M. Changes in antigen-specific IgG1 Fc N-glycosylation upon influenza and tetanus vaccination. Mol Cell Proteomics 2011; 11:M111.014563. [PMID: 22184099 PMCID: PMC3322571 DOI: 10.1074/mcp.m111.014563] [Citation(s) in RCA: 104] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Antibody effector functions have been shown to be influenced by the structure of the Fc N-glycans. Here we studied the changes in plasma or serum IgG Fc N-glycosylation upon vaccination of 10 Caucasian adults and 10 African children. Serum/plasma IgG was purified by affinity chromatography prior to and at two time points after vaccination. Fc N-glycosylation profiles of individual IgG subclasses were determined for both total IgG and affinity-purified anti-vaccine IgG using a recently developed fast nanoliquid chromatography-electrospray ionization MS (LC-ESI-MS) method. While vaccination had no effect on the glycosylation of total IgG, anti-vaccine IgG showed increased levels of galactosylation and sialylation upon active immunization. Interestingly, the number of sialic acids per galactose increased during the vaccination time course, suggesting a distinct regulation of galactosylation and sialylation. In addition we observed a decrease in the level of IgG1 bisecting N-acetylglucosamine whereas no significant changes were observed for the level of fucosylation. Our data indicate that dependent on the vaccination time point the infectious agent will encounter IgGs with different glycosylation profiles, which are expected to influence the antibody effector functions relevant in immunity.
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Affiliation(s)
- Maurice H J Selman
- Department of Parasitology, Leiden University Medical Center, Leiden, the Netherlands
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Agarwal S, Karmaus W, Davis S, Gangur V. Immune markers in breast milk and fetal and maternal body fluids: a systematic review of perinatal concentrations. J Hum Lact 2011; 27:171-86. [PMID: 21678611 DOI: 10.1177/0890334410395761] [Citation(s) in RCA: 94] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Breastfeeding represents the continued exposure of the infant to the maternal immune environment.Uterine, perinatal, and postnatal exposure to immune factors may contribute to an infant’s risk of developing immune-mediated disorders, including allergies. A PubMed search was conducted to review studies in humans and analyze concentrations of immune markers (TGF-beta, IFN-gamma, eotaxin, CCL5, CXCL10, TNF-alpha, MCP-1, IL-1beta, IL-4, IL-5, IL-6,IL-8, IL-10, IL-12, IL-13, sCD14, sIgA, IgG4, IgM) found in maternal serum, amniotic fluid, cord serum, colostrum, transition and mature milk. Concentrations of immune markers showed large variations across samples and studies. Reports documented conflicting results. Small sample sizes, differences in population characteristics, inconsistent sample collection times, and various sample collection and measurement methods may have led to wide variations in the concentrations of immune markers. Studies analyzing the associations between immune markers in maternal fluids and infant allergies remain inconclusive because of gaps in knowledge and a lack of standardized methods.
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24
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Influence of cytokine gene variations on immunization to childhood vaccines. Vaccine 2009; 27:6991-7. [DOI: 10.1016/j.vaccine.2009.09.076] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2009] [Accepted: 09/17/2009] [Indexed: 12/15/2022]
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Abstract
OBJECTIVE The immunoglobulin G2 subclasses contain predominantly antipolysaccharide antibodies. It was therefore believed intuitively that low immunoglobulin G2 levels could predispose individuals to infections with encapsulated bacteria. Although many reports initially supported this notion, more recent studies challenged it. Regardless of the biological significance, the natural history of low immunoglobulin G2 levels has not been carefully studied. METHODS We studied the outcome of low serum immunoglobulin G2 subclass levels in children. Thirteen patients who were referred because of recurrent infections were found to have low immunoglobulin G2 levels. Laboratory evaluation at presentation and follow-up visits included total serum immunoglobulins, immunoglobulin subclasses, and specific antibodies to protein antigens and to pneumococcal vaccine. RESULTS Low immunoglobulin G2 levels resolved completely within 0.6 years to 6 years (median: 1.5 years) in all patients. All 13 patients responded adequately to vaccination with protein antigens such as tetanus toxoid and polio as well as to immunization with pneumococcal vaccine. Four of 13 patients had a previous history of transient hypogammaglobulinemia, raising the possibility that the other cases may simply represent the tail end of this condition. CONCLUSION We have demonstrated that low immunoglobulin G2 detected in early infancy and childhood is likely to resolve completely within several months and up to 6 years from the time of presentation.
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Affiliation(s)
- Adelle R Atkinson
- Division of Immunology and Allergy, Canadian Centre for Primary Immunodeficiency, Hospital for Sick Children, University of Toronto, Toronto, Ontario, Canada M5G 1X8
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Tiller T, Tsuiji M, Yurasov S, Velinzon K, Nussenzweig MC, Wardemann H. Autoreactivity in human IgG+ memory B cells. Immunity 2007; 26:205-13. [PMID: 17306569 PMCID: PMC1839941 DOI: 10.1016/j.immuni.2007.01.009] [Citation(s) in RCA: 364] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2006] [Revised: 01/02/2007] [Accepted: 01/04/2007] [Indexed: 11/19/2022]
Abstract
More than half of the nascent B cells in humans initially express autoreactive antibodies. However, most of these autoantibodies are removed from the repertoire at two checkpoints before maturation into naive B cells. A third checkpoint excludes remaining autoantibodies from the antigen-experienced IgM(+) memory B cell pool. Nevertheless, low-affinity self-reactive antibodies are frequently found in the serum of normal humans. To determine the source of these antibodies, we cloned and expressed antibodies from circulating human IgG(+) memory B cells. Surprisingly, we found that self-reactive antibodies including anti-nuclear antibodies were frequently expressed by IgG(+) memory B cells in healthy donors. Most of these antibodies were created de novo by somatic hypermutation during the transition between mature naive and IgG(+) memory B cells. We conclude that deregulation of self-reactive IgG(+) memory B cells may be associated with autoimmunity.
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Affiliation(s)
- Thomas Tiller
- Max-Planck Institute for Infection Biology, D-10117 Berlin, Germany
| | - Makoto Tsuiji
- Laboratory of Molecular Immunology, The Rockefeller University, New York, NY 10021, USA
| | - Sergey Yurasov
- Department of Pediatrics, Memorial Sloan-Kettering Cancer Center, New York, NY 10021, USA
| | - Klara Velinzon
- Laboratory of Molecular Immunology, The Rockefeller University, New York, NY 10021, USA
| | - Michel C. Nussenzweig
- Laboratory of Molecular Immunology, The Rockefeller University, New York, NY 10021, USA
- Howard Hughes Medical Institute, New York, NY 10021, USA
| | - Hedda Wardemann
- Max-Planck Institute for Infection Biology, D-10117 Berlin, Germany
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27
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Haroun M. The influence of tobacco smoking on humoral immune response in insulin dependent diabetic pregnancy. Indian J Clin Biochem 2006; 21:95-9. [DOI: 10.1007/bf02912920] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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28
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Finocchi A, Romiti ML, Di Cesare S, Puliafito P, Pensieroso S, Rana I, Pinto R, Cancrini C, De Rossi G, Caniglia M, Rossi P. Rapid T-cell receptor CD4+ repertoire reconstitution and immune recovery in unrelated umbilical cord blood transplanted pediatric leukemia patients. J Pediatr Hematol Oncol 2006; 28:403-11. [PMID: 16825984 DOI: 10.1097/01.mph.0000212933.77416.d6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Umbilical cord blood transplantation has been successfully employed for treatment of many immune and hematologic disorders. The aim of this study was to evaluate the quality of immune reconstitution after umbilical cord blood transplantation in 6 leukemia children. T-cell receptor Vbeta third complementary region spectratyping was used for monitoring the contribution of the thymic pathway in patients' immune reconstitution. Absolute numbers of lymphocyte subsets (T, B, and natural killer), and lymphoproliferative in vitro response to mitogens, recovered within 12 months after transplantation. Furthermore, an overall diversification of T-cell receptor complexity in the repopulating T cells, with a polyclonal Gaussian profiles in most (74%) of total families was observed. Noteworthy, we showed a wider and more rapid reconstitution of T-cell receptor CD4+ T cell families compared with T-cell receptor CD8+ T ones still exhibiting some perturbations at 24 months. These data show that umbilical cord blood transplantation allows immune reconstitution already within 12 months with generation of newly diversified CD4+ T lymphocyte subsets.
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Affiliation(s)
- Andrea Finocchi
- Department of Public Health, Tor Vergata University, Division of Immunology and Infectious Diseases, Children's Hospital Bambino Gesù, Rome, Italy.
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Avanzini MA, Monafo V, De Amici M, Maccario R, Burgio GR, Plebani A, Ugazio AG, Hanson LA. Humoral immunodeficiencies in Down syndrome: serum IgG subclass and antibody response to hepatitis B vaccine. AMERICAN JOURNAL OF MEDICAL GENETICS. SUPPLEMENT 2005; 7:231-3. [PMID: 2149953 DOI: 10.1002/ajmg.1320370746] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Newport MJ, Goetghebuer T, Weiss HA, Whittle H, Siegrist CA, Marchant A. Genetic regulation of immune responses to vaccines in early life. Genes Immun 2004; 5:122-9. [PMID: 14737096 DOI: 10.1038/sj.gene.6364051] [Citation(s) in RCA: 161] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Infant immunization is the most cost-effective strategy to prevent infectious diseases in childhood, but is limited by immaturity of the immune system. To define strategies to improve vaccine immunogenicity in early life, the role of genetic and environmental factors in the control of vaccine responses in infant twins was studied. Immune responses to BCG, polio, hepatitis B, diphtheria, pertussis and tetanus vaccines were measured at 5 months of age in 207 Gambian twin pairs recruited at birth. Intrapair correlations for monozygous and dizygous pairs were compared to estimate the environmental and genetic components of variation in responses. High heritability was observed for antibody (Ab) responses to hepatitis B (77%), oral polio (60%), tetanus (44%) and diphtheria (49%) vaccines. Significant heritability was also observed for interferon-gamma and interleukin-13 responses to tetanus, pertussis and some BCG vaccine antigens (39-65%). Non-HLA genes played a dominant role in responses to Ab-inducing vaccines, whereas responses to BCG were predominantly controlled by genes within the HLA class II locus. Genetic factors, particularly non-HLA genes, significantly modulate immune responses to infant vaccination. The identification of the specific genes involved will provide new targets for the development of vaccines and adjuvants for young infants that work independently of HLA.
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Affiliation(s)
- M J Newport
- Department of Medicine, University of Cambridge, UK.
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31
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Schauer U, Stemberg F, Rieger CHL, Borte M, Schubert S, Riedel F, Herz U, Renz H, Wick M, Carr-Smith HD, Bradwell AR, Herzog W. IgG Subclass Concentrations in Certified Reference Material 470 and Reference Values for Children and Adults Determined with The Binding Site Reagents. Clin Chem 2003; 49:1924-9. [PMID: 14578325 DOI: 10.1373/clinchem.2003.022350] [Citation(s) in RCA: 105] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Abstract
Background: There is currently no international reference preparation for IgG subclass (IgGSc) quantification. This situation has led to calibration differences among assays and a variety of reference interval values with consequential difficulties in comparing results. We therefore evaluated IgGSc concentrations in Certified Reference Material 470 (CRM 470).
Methods: Pure, polyclonal IgG1, -2, -3, and -4 were prepared from a large serum pool for use as primary standards. The IgG mass in each preparation was calculated from amino-acid analysis data. IgGSc concentrations were assessed in CRM 470 by nephelometry with modern analytical techniques, using these reference preparations. Subsequently, IgGSc concentrations were measured in 380 healthy individuals (250 males and 130 females), and age-dependent reference intervals were established.
Results: IgGSc concentrations in CRM 470 were as follows: IgG1, 5028 mg/L; IgG2, 3418 mg/L; IgG3, 579 mg/L, and IgG4, 381 mg/L, with a total IgG concentration of 9406 mg/L, 2.83% below the certified total IgG value of 9680 mg/L. Age-dependent percentile curves for the four IgGSc were constructed using a Box–Cox transformation. Maximum median values were as follows: IgG1, 6.02 g/L at 11 years; IgG2, 3.45 g/L at 31 years; IgG3, 0.63 g/L at 17 years; and IgG4, 0.48 g/L at 14 years. No significant sex-related differences were observed.
Conclusions: The correlation between the summation of individual IgGSc and separate measurements of total IgG concentrations was good and supports the accuracy of the results. The results are based on The Binding Site assays and should not be considered appropriate for other assays unless so demonstrated.
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Affiliation(s)
- Uwe Schauer
- Klinik für Kinder- und Jugendmedizin der Ruhr Universität Bochum, D-44791 Bochum, Germany.
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Chung HY, Lu HC, Chen WL, Lu CT, Yang YH, Tsai CC. Immunoglobulin G profiles in different forms of periodontitis. J Periodontal Res 2003; 38:471-6. [PMID: 12941070 DOI: 10.1034/j.1600-0765.2003.00675.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Races and Gm(23) allotypes can modify the serum levels of IgG subclasses. The average serum levels of IgG subclasses of African-Americans have been reported to be higher than those of Caucasians in both healthy young adults and patients with aggressive periodontitis; Gm(23)-positive subjects generally had higher IgG2 levels than Gm(23)-negative subjects. OBJECTIVE We examined serum immunoglobulin G (IgG) concentrations in Taiwanese patients with different forms of periodontitis. METHODS The serum levels of four IgG subclasses were determined by enzyme-linked immunosorbent assay and Gm(23) allotypes were verified by radial immunodiffusion tests in 50 patients with chronic periodontitis, 30 patients with aggressive periodontitis, and 74 healthy controls. RESULTS There were no differences in the concentrations of four IgG subclasses in patients with chronic periodontitis compared with age-matched controls. However, in subjects younger than 35 years, levels of IgG2 were significantly elevated in patients with aggressive periodontitis compared with controls. We also found significant differences in IgG2 levels within the control group when stratified by age (< or = 35 years and > 35 years). Gm(23) allotypes were not correlated with the serum levels of IgG2 in either patient group. CONCLUSION Microbial challenge might not provoke significant changes in systemic IgG response in patients with chronic periodontitis. However, in patients with aggressive periodontitis, IgG2 levels were increased when compared with age-matched controls. Gm(23) allotypes had no influence on IgG2 levels in well-established generalized chronic periodontitis or aggressive periodontitis.
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He X, Ng KW, Shi J. Marginal versus joint Box-Cox transformation with applications to percentile curve construction for IgG subclasses and blood pressures. Stat Med 2003; 22:397-408. [PMID: 12529871 DOI: 10.1002/sim.1305] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
When age-specific percentile curves are constructed for several correlated variables, the marginal method of handling one variable at a time has typically been used. We address the question, frequently asked by practitioners, of whether we can achieve efficiency gains by joint estimation. We focus on a simple but common method of Box-Cox transformation and assess the statistical impact of a joint transformation to multivariate normality on the percentile curve estimation for correlated variables. We find that there is little gain from the joint transformation for estimating percentiles around the median but a noticeable reduction in variances is possible for estimating extreme percentiles that are usually of main interest in medical and biological applications. Our study is motivated by problems in constructing percentile charts for IgG subclasses of children and for blood pressures in adult populations, both of which are discussed in the paper as examples, and yet our general findings are applicable to a wide range of other problems.
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Affiliation(s)
- Xuming He
- Department of Statistics, University of Illinois, USA
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Finocchi A, Angelini F, Chini L, Di Cesare S, Cancrini C, Rossi P, Moschese V. Evaluation of the relevance of humoral immunodeficiencies in a pediatric population affected by recurrent infections. Pediatr Allergy Immunol 2002; 13:443-7. [PMID: 12485321 DOI: 10.1034/j.1399-3038.2002.02088.x] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Recurrent infections are a common cause of morbidity in childhood. Several reports have associated this condition to low levels of IgA and IgG subclasses and/or lack of specific antipolysaccharide antibody response, although the relevance of these defects in terms of prognosis and therapeutic approach is still unclear. The aim of our study was to determine the frequency and the clinical relevance of humoral immunodeficiency (HID) other than hypogammaglobulinemia in children affected by recurrent infections. We recruited 67 pediatric patients affected by recurrent infections. Serum IgG, IgA, IgM, IgG2, IgG3, and specific anti-Haemophilus influenzae (anti-Hib) antibodies were determined. Thirty-seven out of 67 patients showed antibody defects (55%). IgA deficiency was observed in 21 out of 67 patients (31%), followed by IgG2 (18%), IgG3 (15%) and IgM (6%) defects. Anti-Hib deficiency was present in three out of 44 patients (7%). A tendency for a higher occurrence of pneumonia and otitis, although not statistically significant (p > 0.05), was observed in HID patients compared to children with normal humoral function. No statistical difference as to the frequency of mild infections (URI) was found between HID and non-HID patients. We therefore suggest that the therapeutic program is based on the clinical status of the patients. Long-term follow-up with repeated determinations of antibody levels is crucial, however, to detect those defects that might evolve into more complex immunodeficiencies.
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Affiliation(s)
- Andrea Finocchi
- Department of Pediatrics, Division of Immunology and Infectious Diseases, Children's Hospital Bambino Gesu', Rome, Italy
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Abstract
Over the past four decades, many patients have been reported to have deficiencies of one or more subclasses of immunoglobulin G (IgG), despite normal total IgG serum concentrations. However, except for those with extremely low or absent IgG2 concentrations and an inability to produce antibodies to polysaccharide antigens, it is difficult to know the true biologic significance of the many reported IgG subclass deficiencies. Completely asymptomatic individuals who totally lack IgG1, IgG2, IgG4, or IgA1 because of heavy-chain gene deletions have been described as producing antibodies normally. In addition, numerous healthy children who have low levels of IgG2 but normal responses to polysaccharide antigens when immunized have been similarly described. From these observations, it can be concluded that IgG subclass measurement is not very helpful in the general assessment of immune function. Such assays provide no information about the patient's capacity to produce specific antibodies to protein, polysaccharide, or viral antigens.
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Affiliation(s)
- Rebecca H Buckley
- Pediatrics/Allergy/Immunology, Duke University School of Medicine, Box 2898, Durham, NC 27710, USA.
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Karlström R, Gustafson R, Palmblad J. Chronic mild neutropenia in adults: relation to IgG3 deficiency and infection susceptibility. J Intern Med 2001; 250:342-7. [PMID: 11576321 DOI: 10.1046/j.1365-2796.2001.00896.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVES Chronic mild neutropenias (NP, i.e. absolute neutrophil blood counts/ANC/0.5-1.5 x 10(9) L(-1)) are accompanied by a variable infection susceptibility, which may or may not be as a result of concomitant conditions. Here, we assessed whether such patients also displayed an immunoglobulin deficiency and if this condition contributed to infection proneness. DESIGN, SETTING AND SUBJECTS Thirty consecutive adult Caucasian patients with chronic mild NP were followed at one university hospital for up to 28 years. Comparisons were made with 49 IgG3 deficiency patients at an immunodeficiency clinic. MAIN OUTCOME MEASURES Recorded infections, ANC and serum immunoglobulin levels; flow cytometry assessments of blood lymphocyte subsets and tests for autoimmunity were run to determine neutropenia subtypes. RESULTS Forty per cent of the NP patients were treated for severe or recurrent infections. The mean IgG3 value for the NP patients was significantly lower than for healthy controls (P < 0.005) and 33% of the patients displayed IgG3 values below the reference values (i.e. below 0.21 g L(-1)), and an additional 13% had IgG3 values within the range others consider low (0.21-0.41 g L(-1)). Unexpectedly, neutropenic IgG3 deficiency patients exhibited less infection proneness than those with normal IgG3 values (P=0.03). Patients with autoimmune, large granular lymphocyte-associated or idiopathic NP had IgG3 deficiency in 63, 44 and 38%, respectively. In addition, none of IgG3 deficiency patients followed at the immunodeficiency clinic displayed neutropenia. CONCLUSION IgG3 deficiency is common amongst chronic mild neutropenia patients, particularly in those with autoimmune background, but contributes not significantly to infection susceptibility.
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Affiliation(s)
- R Karlström
- Department of Medicine, Division of Hematology, The Karolinska Institutet at Huddinge University Hospital, S-141 86 Stockholm, Sweden
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Abstract
Preclinical and human vaccine studies indicate that, although neonatal immunisation does not generally lead to rapid and strong antibody responses, it may result in an efficient immunological priming, which can serve as an excellent basis for future responses. The apparent impairment of CD4 and CD8 T-cell function in early life seems to result from suboptimal antigen-presenting cells-T cell interactions, which can be overcome by use of specific adjuvants or delivery systems. Although persistence of maternal antibodies may limit infant antibody responses, induction of T-cell responses largely remain unaffected by these passively transferred antibodies. Thus, neonatal priming and early boosting with vaccine formulations optimised for sufficient early life immunogenicity and maximal safety profiles, could allow better control of the huge infectious disease burden in early life.
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Affiliation(s)
- C A Siegrist
- WHO Collaborating Centre for Neonatal Vaccinology, Departments of Pediatrics and Pathology, University of Geneva, 1 Michel-Servet, 1211 4, Geneva, Switzerland.
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Qvarfordt I, Riise GC, Andersson BA, Larsson S. IgG subclasses in smokers with chronic bronchitis and recurrent exacerbations. Thorax 2001; 56:445-9. [PMID: 11359959 PMCID: PMC1746070 DOI: 10.1136/thorax.56.6.445] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND Tobacco smokers have lower serum levels of IgG than non-smokers. IgG subclass deficiency is common in patients with recurrent respiratory infections. Recurrent bronchial infections are common in smokers with chronic bronchitis (CB). We have investigated whether susceptibility to recurrent exacerbations in smokers with CB is associated with altered IgG subclass levels or IgG subclass deficiency. METHODS Serum levels of IgG, IgA, IgM, and IgG subclasses 1-4 were determined by radial immunodiffusion in 100 subjects: 33 smokers with stable CB and recurrent exacerbations, 24 asymptomatic smokers, and 43 healthy never smokers. Systemic tobacco exposure was verified and excluded using a serum cotinine ELISA. Immunoglobulin data were log transformed to enable use of parametric statistical methods. RESULTS Compared with never smokers, both patients with CB and asymptomatic smokers had significantly lower levels of IgG (median 9.7 g/l (range 5.6-15.2) and 9.9 (6.1-12.1) g/l v 12.0 (6.9-18.5) g/l) and IgG2 (2.8 (0.9-5.9) g/l and 2.5 (1.0-6.3) g/l v 4.0 (1.7-10.2) g/l). The estimated ratio of median values between the patients with CB and never smokers was 0.78 (95% confidence interval (CI) 0.69 to 0.89) for IgG and 0.65 (95% CI 0.50 to 0.83) for IgG2. The corresponding ratios between asymptomatic smokers and never smokers were 0.79 (95% CI 0.69 to 0.91) and 0.60 (95% CI 0.50 to 0.83), respectively. There were no significant differences between the smoking groups. CONCLUSIONS Susceptibility to recurrent exacerbations in smokers with CB is not associated with lower levels of IgG subclasses than can be accounted for by smoking per se.
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Affiliation(s)
- I Qvarfordt
- Department of Respiratory Medicine and Allergology, Sahlgrenska University Hospital, S-413 45 Göteborg, Sweden.
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Qvarfordt I, Riise GC, Andersson BA, Larsson S. IgG subclasses in smokers with chronic bronchitis and recurrent exacerbations. Thorax 2001. [DOI: 10.1136/thx.56.6.445] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUNDTobacco smokers have lower serum levels of IgG than non-smokers. IgG subclass deficiency is common in patients with recurrent respiratory infections. Recurrent bronchial infections are common in smokers with chronic bronchitis (CB). We have investigated whether susceptibility to recurrent exacerbations in smokers with CB is associated with altered IgG subclass levels or IgG subclass deficiency.METHODSSerum levels of IgG, IgA, IgM, and IgG subclasses 1–4 were determined by radial immunodiffusion in 100 subjects: 33 smokers with stable CB and recurrent exacerbations, 24 asymptomatic smokers, and 43 healthy never smokers. Systemic tobacco exposure was verified and excluded using a serum cotinine ELISA. Immunoglobulin data were log transformed to enable use of parametric statistical methods.RESULTSCompared with never smokers, both patients with CB and asymptomatic smokers had significantly lower levels of IgG (median 9.7 g/l (range 5.6–15.2) and 9.9 (6.1–12.1) g/l v 12.0 (6.9–18.5) g/l) and IgG2 (2.8 (0.9–5.9) g/l and 2.5 (1.0–6.3) g/lv 4.0 (1.7–10.2) g/l). The estimated ratio of median values between the patients with CB and never smokers was 0.78 (95% confidence interval (CI) 0.69 to 0.89) for IgG and 0.65 (95% CI 0.50 to 0.83) for IgG2. The corresponding ratios between asymptomatic smokers and never smokers were 0.79 (95% CI 0.69 to 0.91) and 0.60 (95% CI 0.50 to 0.83), respectively. There were no significant differences between the smoking groups.CONCLUSIONSSusceptibility to recurrent exacerbations in smokers with CB is not associated with lower levels of IgG subclasses than can be accounted for by smoking per se.
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Burgio GR. Practicing a culture of pediatric immunogenetics. AMERICAN JOURNAL OF MEDICAL GENETICS 2001; 100:257-63. [PMID: 11343315 DOI: 10.1002/ajmg.1268] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/16/2023]
Affiliation(s)
- G R Burgio
- Department of Pediatrics, University of Pavia, Pavia, Italy
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Cardinale F, Gentile V, Brunetti L, Hanson LA, Armenio L. Titres of specific antibodies to poliovirus type 3 and tetanus toxoid in saliva and serum of children with recurrent upper respiratory tract infections. Pediatr Allergy Immunol 2001; 12:42-8. [PMID: 11251864 DOI: 10.1034/j.1399-3038.2001.012001042.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
A study of antibody levels (in saliva and blood) against common vaccine antigens was performed in a population of 32 children suffering from recurrent upper respiratory tract infections (URTI). None of the patients had primary or secondary immunodeficiency syndromes or other known predisposing factors for respiratory diseases. Titres of the isotype-specific antibodies immunoglobulin A (IgA), immunoglobulin M (IgM), and immunoglobulin G (IgG) against two vaccine antigens--poliovirus type 3 (P3) and tetanus toxoid (TT), a viral antigen and a bacterial antigen, respectively--were measured in unstimulated saliva and serum, both in patients and in 24 healthy children (controls), by using a standard enzyme-linked immunosorbent assay (ELISA). In addition, levels of total IgA and avidity of IgA antibodies to both P3 and TT in saliva were evaluated. No difference was found between patients and controls as to levels of total IgA, or specific IgA and IgM antibodies against both P3 and TT in saliva. Furthermore, the avidity of salivary IgA antibodies against the two antigens did not differ between the two populations. However, the average concentrations of saliva-specific IgG antibodies to both the viral and the bacterial antigen were significantly lower (p <0.01 for P3 and p <0.05 for TT, respectively) in saliva of children with recurrent URTI, whereas no difference was found in serum for any immunoglobulin isotype determined compared with healthy individuals. The results of the present study provide suggestive evidence for the existence of subtle IgG-restricted defects in antibody responses at the mucosal level, but not at the serum level, in some children with undue susceptibility to URTI.
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Affiliation(s)
- F Cardinale
- Department of Pediatrics, University of Bari, Italy
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42
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Goldman AS, Miles SE, Rudloff HE, Palkowetz KH, Schmalstieg FC. Immunodeficiency due to a unique protracted developmental delay in the B-cell lineage. CLINICAL AND DIAGNOSTIC LABORATORY IMMUNOLOGY 1999; 6:161-7. [PMID: 10066647 PMCID: PMC95680 DOI: 10.1128/cdli.6.2.161-167.1999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/1998] [Accepted: 10/07/1998] [Indexed: 11/20/2022]
Abstract
A unique immune deficiency in a 24-month-old male characterized by a transient but protracted developmental delay in the B-cell lineage is reported. Significant deficiencies in the number of B cells in the blood, the concentrations of immunoglobulins in the serum, and the titers of antibodies to T-dependent and T-independent antigens resolved spontaneously by the age of 39 months in a sequence that duplicated the normal development of the B-cell lineage: blood B cells followed by immunoglobulin M (IgM), IgG, IgA, and specific IgG antibodies to T-independent antigens (pneumococcal polysaccharides). Because of the sequence of recovery, the disorder could have been confused with other defects in humoral immunity, depending on when in the course of disease immunologic studies were conducted. Investigations of X-chromosome polymorphisms suggested that the disorder was not X linked in that the mother appeared to have identical X chromosomes. An autosomal recessive disorder involving a gene that controls B-cell development and maturation seems more likely. In summary, this case appears to be a novel protracted delay in the development of the B-cell lineage, possibly due to an autosomal recessive genetic defect.
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Affiliation(s)
- A S Goldman
- Department of Pediatrics of the University of Texas Medical Branch, Galveston 77555-0369, USA.
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43
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Marconi M, Plebani A, Avanzini MA, Maccario R, Pistorio A, Duse M, Stringa M, Monafo V. IL-10 and IL-4 co-operate to normalize in vitro IgA production in IgA-deficient (IgAD) patients. Clin Exp Immunol 1998; 112:528-32. [PMID: 9649225 PMCID: PMC1905004 DOI: 10.1046/j.1365-2249.1998.00589.x] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
In the present study we evaluated in vitro immunoglobulin production from IgAD individuals and healthy controls. Peripheral blood mononuclear cells (PBMC) from IgAD and controls were cultured with anti-CD40 MoAb presented on a CDw32-transfected fibroblast cell line (CD40 system) in the presence of IL-10, IL-2, IL-4, transforming growth factor-beta (TGF-beta) alone as well as of IL-10 in combination with each of the other three cytokines. Only IL-10 added alone induced significant changes in baseline immunoglobulin production; marked increases in median supernatant levels of all three isotypes were observed in both groups. The most striking finding of this study was the synergizing effect of IL-4 on IgA production in the IgAD group when added with IL-10; median IgA supernatant level increased to a value superimposable on that found in the normal controls which remained about the same as when stimulated with IL-10 alone. The synergic effect of IL-4 and IL-10 was specific to the IgA isotype.
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Affiliation(s)
- M Marconi
- Department of Paediatrics, University of Pavia, Italy
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Hill SL, Mitchell JL, Burnett D, Stockley RA. IgG subclasses in the serum and sputum from patients with bronchiectasis. Thorax 1998; 53:463-8. [PMID: 9713445 PMCID: PMC1745252 DOI: 10.1136/thx.53.6.463] [Citation(s) in RCA: 54] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
BACKGROUND IgG subclass deficiency is often associated with recurrent pulmonary infections. The prevalence of deficiency in a large well characterised group of patients with bronchiectasis has not previously been established. METHODS Serum IgG subclass concentrations in 89 patients with bronchiectasis were compared with those obtained from a group of 82 age and sex matched normal healthy controls. Sputum IgG subclass concentrations were also assessed in 44 of the patients. Albumin was measured as a marker of protein transudation from plasma to determine the degree of local IgG subclass production. RESULTS The serum concentrations of IgG1, IgG2 and IgG3 were increased in the patients compared with the control group whereas IgG4 concentrations were not. There was an overall incidence of deficiency of 1% for subclasses 1-3 and 5% for subclass 4 in patients with bronchiectasis based on observed concentrations being below the lower limit of the control group range. The concentrations of IgG subclasses in sputum were partly dependent upon the degree of inflammation as assessed by the macroscopic appearance of purulence. A comparison of the ratio of sputum:serum subclass concentration and sputum:serum albumin, however, revealed that all of the subclasses were present at greater concentrations than could be accounted for by transudation alone. CONCLUSIONS A new normal control range for serum IgG subclasses has been established and from this range it was found that IgG subclass deficiency in a group of unselected patients with bronchiectasis was comparatively rare. A significant degree of local IgG production was also suggested in the lungs of these patients.
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Affiliation(s)
- S L Hill
- Department of Medicine, University of Birmingham, UK
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45
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Avanzini MA, Carrà AM, Maccario R, Zecca M, Zecca G, Pession A, Comoli P, Bozzola M, Prete A, Esposito R, Bonetti F, Locatelli F. Immunization with Haemophilus influenzae type b conjugate vaccine in children given bone marrow transplantation: comparison with healthy age-matched controls. J Clin Immunol 1998; 18:193-201. [PMID: 9624578 DOI: 10.1023/a:1020578921706] [Citation(s) in RCA: 18] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Forty-seven patients (age range, 7 months-18 years) with malignant (38 cases) and nonmalignant (9 cases) disorders given an allogeneic or an autologous bone marrow transplantation (BMT) were immunized with Haemophilus influenzae type b (Hib) polysaccharide-diphtheria toxoid conjugate vaccine administered in a single dose at different time points after transplantation. Results were compared with those of 13 healthy children matched for age and sex who received the same immunization schedule. Serum and saliva samples for measurement of total IgG subclass and specific antibody levels were obtained from patients and healthy controls before and 3 weeks after vaccination. Twenty-five of the 47 patients (53%) had a specific anti-Hib IgG response, while an effective IgA and IgM response was mounted by 23 (49%) and 11 (23%) children, respectively. In the control group, 13 of 13 subjects mounted a specific IgG antibody production (P < 0.005 in comparison to the patients' response rate), while an IgA and IgM response was demonstrated in 12 (92%; P < 0.01 compared to transplanted patients) and 7 (54%; P < 0.05 in comparison to BMT recipients) children, respectively. Lapse of time from BMT to immunization was the most important factor predicting antibody response, as proved by an effective increase in prevaccination specific IgG levels in the majority of patients vaccinated after 2 years from transplant. Our data demonstrate that BMT recipients have a reduced capacity to mount an antibody response to polysaccharide antigens compared to normal controls, even when a protein-conjugated vaccine is employed. Since time after transplant is the major factor influencing the recovery of immune reactivity to polysaccharide antigens, the ontogeny of the B cell repertoire seems to follow a predetermined sequential program of development.
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Affiliation(s)
- M A Avanzini
- Laboratori Sperimentali, IRCCS Policlinico San Matteo, Pavia, Italy
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White AG, Al-Riyami HA, Kuchipudi P, Daar AS. Immunoglobulins, immunoglobulin G subclasses and complement in adult Omanis. Ann Saudi Med 1997; 17:39-42. [PMID: 17377463 DOI: 10.5144/0256-4947.1997.39] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Immunoglobulins and complement were quantitated in 100 healthy adult Omanis in order to establish a reference range based on local data. Mean values were IgA 2.38 g/L, IgM 1.14 g/L, IgE 241 kiu/L, C3 7.44 micro mol/L and C4 1.57 micro mol/L, values similar to those found in the West. However, the mean level of IgG was almost 50% higher than that found in North America and Europe, that is, 14.63 g/L compared with 10-11 g/L. The values for IgG, IgA, IgM and IgE are similar to those reported for Iraq, but IgG levels were much lower than those found in Iran (25.52 g/L), although IgA, IgM and IgE were comparable. Comparison of Omani data with that for Saudi Arabia showed significantly more IgG in Oman (14.63 versus 11.68 g/L) and significantly less IgM (1.14 versus 1.66 g/L). IgA and IgE levels were similar. As reported elsewhere, females had significantly more IgM than males (1.32 versus 0.97 g/L). The levels of IgG subclasses in Oman are 9.44, 4.01, 1.06 and 0.62 g/L for IgG1-4 respectively. The percentage of the various subclasses are very similar to those reported elsewhere, that is, 62%, 27%, 7% and 4% for IgG1-4. However, in Iraq, a higher percentage (and level) of IgG3 (16%) and the lower IgG2 (18%) compared to Oman may reflect differing immune responses resulting from exposure to different microorganisms. It is essential to use local reference data when evaluating patients.
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Affiliation(s)
- A G White
- College of Medicine, Sultan Qaboos University
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47
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Brusco A, Boccazzi C, Plebani A, DeLange GG, Depelchin S, Carbonara AO. Serum immunoglobulin levels in heterozygous subjects with immunoglobulin heavy chain constant region gene deletions. INTERNATIONAL JOURNAL OF CLINICAL & LABORATORY RESEARCH 1995; 25:165-8. [PMID: 8562982 DOI: 10.1007/bf02592561] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Abstract
The immunoglobulin heavy chain constant region locus is a multigene family composed of nine genes and two pseudogenes, whose high homology is often responsible for meiotic mispairings leading to deleted and duplicated haplotypes. These rearrangements have a population frequency of about 1.5% and 4.5% respectively, with a significant difference between deletions and duplications (P < 0.001). Both positive selection of duplications or negative selection against deletions can account for this imbalance. Serum levels of IgG and IgA subclasses, of IgE, of isohemagglutinins and of IgG antibodies to tetanus toxoid and pneumococcal antigens were evaluated in 11 heterozygous carriers of constant region deletions. There was no gross abnormality in serum IgG and IgA subclass levels, with the possible exception of G1-deleted individuals; furthermore, isohemagglutinins and anti-tetanus toxoid and pneumococcal IgG antibodies are in the normal range, suggesting that the humoral immune response is normal in these carriers. The influence of single and multiple immunoglobulin heavy chain constant region gene deletions on the humoral response is discussed.
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Affiliation(s)
- A Brusco
- Dipartimento di Genetica Biologia e Chimica Medica e Centro CNR CII-CIOS, Turin, Italy
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48
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Avanzini MA, Carra AM, Maccario R, Zecca M, Pignatti P, Marconi M, Comoli P, Bonetti F, De Stefano P, Locatelli F. Antibody response to pneumococcal vaccine in children receiving bone marrow transplantation. J Clin Immunol 1995; 15:137-44. [PMID: 7559916 DOI: 10.1007/bf01543105] [Citation(s) in RCA: 57] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Fifty-three pediatric patients given an allogeneic or an autologous bone marrow transplantation (BMT) were immunized with a polyvalent pneumococcal capsular polysaccharide vaccine (Pneumovax II). Vaccine was administered six months or more after BMT and the pneumococcal IgM, total IgG, and IgG subclasses levels were evaluated before and three weeks after immunization. Immunization promoted a significant rise in antibody serum levels (P < 0.000001), and all children vaccinated more than two years after transplantation responded to pneumococcal polysaccharides, whereas only 20-30% and 50% of patients given BMT between six months and one year and one and two years, respectively, mounted an effective antibody production (P < 0.0001). In univariate analysis, lapse of time from BMT to vaccination, chronic graft-versus-host disease occurrence, and female sex influenced the response rate. However, in multivariate analysis, only time between marrow transplant and immunization was a powerful predictor of response. Interestingly, four of 11 patients with IgG2 deficiency before immunization normalized serum levels of this IgG subclass after the pneumococcal antigenic challenge. Our study suggests that time after transplant is the major factor influencing the recovery of immune reactivity to polysaccharide antigens. This seems to confirm the hypothesis that ontogeny of the B-cell repertoire follows a predetermined sequential program in which polysaccharide antigens are some of the last to evoke an antibody response.
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Affiliation(s)
- M A Avanzini
- Department of Pediatrics University of Pavia, I.R.C.C.S. Policlinico San Matteo, Italy
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Brière F, Bridon JM, Chevet D, Souillet G, Bienvenu F, Guret C, Martinez-Valdez H, Banchereau J. Interleukin 10 induces B lymphocytes from IgA-deficient patients to secrete IgA. J Clin Invest 1994; 94:97-104. [PMID: 7518836 PMCID: PMC296286 DOI: 10.1172/jci117354] [Citation(s) in RCA: 97] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
We have previously shown that human B lymphocytes cultured in the CD40 system, composed of an anti-CD40 mAb presented by a CD32-transfected fibroblastic cell line, proliferate but do not secrete antibodies. However, the addition of particles of Staphylococcus aureus Cowan (SAC) induces B cell differentiation even in the absence of exogenous cytokines (CD40/SAC system). Additionally, B lymphocytes cultured in the CD40 system in the presence of human IL-10, produce IgM, IgG, and IgA, and Ig levels are further increased by SAC. Here, we have studied the capacity of peripheral blood lymphocytes from patients with IgA deficiency (IgA-D) to secrete Igs, particularly IgA after CD40 triggering. Peripheral blood mononuclear cells (PBMNC) from IgA-D patients cultured in the CD40/SAC system produced IgM and IgG, but not IgA. The addition of IL-10 to the cultures, enhanced the production of IgM and IgG and most strikingly induced the production of high amounts of IgA. The addition of IL-10 to PBMNC from IgA-D patients activated through CD40 alone resulted in the production of IgA. Thus, SAC and anti-CD40 mAb stimulate B cells to differentiate into cells secreting IgG and IgM whereas IL-10 plays a central role in inducing B cells from IgA-D patients to differentiate into IgA secreting cells.
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Affiliation(s)
- F Brière
- Schering-Plough, Laboratory for Immunological Research, Dardilly, France
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50
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Lu H, Wang M, Gunsolley JC, Schenkein HA, Tew JG. Serum immunoglobulin G subclass concentrations in periodontally healthy and diseased individuals. Infect Immun 1994; 62:1677-82. [PMID: 8168929 PMCID: PMC186382 DOI: 10.1128/iai.62.5.1677-1682.1994] [Citation(s) in RCA: 71] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
Patients with localized juvenile periodontitis (LJP) often have high titers of antibody reactive with the serotype-specific immunodominant carbohydrate antigen of Actinobacillus actinomycetemcomitans serotype b. The vast majority of this A. actinomycetemcomitans serotype b-specific antibody is immunoglobulin G2 (IgG2). The present study was undertaken to determine whether the overall total levels of IgG2 in the sera of LJP patients are elevated. LJP patients and nonperiodontitis (NP) controls matched for age, race (black and white), and gender were studied. Additional controls included patients with adult periodontitis (AP) and patients similar in age to LJP patients but with the more-severe, generalized form of early-onset periodontitis (SP). Sera from over 700 periodontally characterized subjects were examined by using radial immunodiffusion to quantitate IgG2 as well as IgG1, -3, and -4, which were included for comparison. Serum IgG2 levels increased with age, and this was most dramatic around puberty. Black subjects in all periodontal groups had nearly 1 mg more IgG2 per ml than their white counterparts. Serum IgG2 levels were elevated (about 30 to 40%) in LJP patients of both races compared with their age- and race-matched NP controls (P < 0.01). In contrast, SP patients and AP patients had IgG2 levels comparable to their age- and race-matched NP controls. No other IgG subclass concentration correlated with periodontal diagnosis except for IgG3, which was elevated in white LJP patients. We reason that the high levels of serum IgG2 in LJP may be helpful in localizing periodontal destruction.
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Affiliation(s)
- H Lu
- Department of Microbiology and Immunology, Medical College of Virginia/Virginia Commonwealth University, Richmond 23298
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