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Haberstroh H, Hirsch A, Goldacker S, Zessack N, Warnatz K, Grimbacher B, Salzer U. A Toolkit for Monitoring Immunoglobulin G Levels from Dried Blood Spots of Patients with Primary Immunodeficiencies. J Clin Immunol 2023:10.1007/s10875-023-01464-0. [PMID: 36941491 PMCID: PMC10027597 DOI: 10.1007/s10875-023-01464-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 03/02/2023] [Indexed: 03/23/2023]
Abstract
PURPOSE This study assessed whether measuring immunoglobulin G (IgG) from dried blood spots (DBSs) using nephelometry is a suitable remote monitoring method for patients with primary immunodeficiencies (PID). METHODS Patients receiving immunoglobulin replacement therapy for PID were included in this non-interventional single-arm study (DRKS-ID: DRKS00020522) conducted in Germany from December 4, 2019, to December 22, 2020. Three blood samples, two capillary DBSs (one mail-transferred and the other direct-transferred to the laboratory), and one intravenous were collected from each patient. IgG levels were determined using nephelometry. IgG levels were summarized descriptively, and significant differences were assessed using Wilcoxon matched-pairs signed-rank tests. Correlation and agreement between IgG levels were assessed using Spearman correlation and Bland-Altman analyses, respectively. RESULTS Among 135 included patients, IgG levels measured from DBS samples were lower than those measured in serum (p < 0.0001). There was no significant difference between IgG levels in direct- and mail-transferred DBS samples. There was a high degree of correlation between IgG levels in serum samples and DBS samples (r = 0.94-0.95). Although there was a bias for higher levels of IgG in serum than in DBS samples, most samples were within the 95% interval of agreement. There was a high degree of correlation between IgG levels measured in direct- and mail-transferred DBS samples (r = 0.96) with no bias based on the shipment process and most samples within the 95% interval of agreement. CONCLUSION Monitoring IgG levels from DBS samples is a suitable alternative to the standard method, and results are not substantially affected by mailing DBS cards.
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Affiliation(s)
- Hanna Haberstroh
- Institute for Immunodeficiency, Center for Chronic Immunodeficiency (CCI), Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- DZIF - German Center for Infection Research, Satellite Center, Freiburg, Germany
| | - Aleksandra Hirsch
- Department of Rheumatology and Clinical Immunology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Center for Chronic Immunodeficiency (CCI), Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Sigune Goldacker
- Department of Rheumatology and Clinical Immunology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Center for Chronic Immunodeficiency (CCI), Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | | | - Klaus Warnatz
- Department of Rheumatology and Clinical Immunology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
- Center for Chronic Immunodeficiency (CCI), Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany
| | - Bodo Grimbacher
- Institute for Immunodeficiency, Center for Chronic Immunodeficiency (CCI), Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
- DZIF - German Center for Infection Research, Satellite Center, Freiburg, Germany.
- Department of Rheumatology and Clinical Immunology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
- Center for Chronic Immunodeficiency (CCI), Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
- CIBSS - Centre for Integrative Biological Signalling Studies, Albert-Ludwigs University, Freiburg, Germany.
- RESIST - Cluster of Excellence 2155 to Hanover Medical School, Satellite Center Freiburg, Freiburg, Germany.
| | - Ulrich Salzer
- Department of Rheumatology and Clinical Immunology, Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
- Center for Chronic Immunodeficiency (CCI), Medical Center - University of Freiburg, Faculty of Medicine, University of Freiburg, Freiburg, Germany.
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Saadatmand F, Abbas M, Apprey V, Tailor K, Kwabi-Addo B. Sex differences in saliva-based DNA methylation changes and environmental stressor in young African American adults. PLoS One 2022; 17:e0273717. [PMID: 36067197 PMCID: PMC9447871 DOI: 10.1371/journal.pone.0273717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 08/02/2022] [Indexed: 11/21/2022] Open
Abstract
BACKGROUND Low socioeconomic status neighborhood exposure to stress and violence may be sources of negative stimuli that poses significant health risks for children, adolescents and throughout the life course of an individual. The study aims to investigate if aberrant epigenetic DNA methylation changes may be a potential mechanism for regulating neighborhood exposures and health outcomes. METHODS Exposure to environmental stressors identified in 98 young African American (AA) adults aged 18-25 years old from the Washington D.C., area were used in the study. We correlated the association between stress markers; cortisol, CRP, IgG, IGA, IgM, and self-reported exposure to violence and stress, with quantitative DNA methylation changes in a panel of gene-specific loci using saliva DNA. RESULTS In all participants studied, the exposure to violence was significant and negatively correlated with DNA methylation of MST1R loci (p = 0.032; r = -0.971) and nominally significant with NR3C1 loci (p = 0.053; r = -0.948). In addition, we observed significant and negative correlation of DNA methylation changes of LINE1 (p = 0.044; r = -0.248); NR3C1 (p = 0.017; r = -0.186); MSTR1 (p = 0.022; r = -0.192); and DRD2 (p = 0.056; r = -0.184; albeit nominal significant correlation) with IgA expression. On the other hand, we observed a significant and position correlation of DNA methylation changes in DRD2 (p = 0.037; r = 0.184) with IgG expression. When participants were stratified by sex, we observed in AA young male adults, significant DNA methylation changes of MST1R (p< 0.05) and association with exposure to violence and IgG level. We also observed significant DNA methylation levels of DRD2 (p< 0.05) and association with IgA, IgG, and cortisol level. Furthermore, we observed significant DNA methylation changes of NR3C1 (p< 0.05) with stress, IgA, and IgG in the male participants only. On the other hand, we only observed significant and a positive association of IgG with DNA methylation levels of ESR1 (p = 0.041) in the young AA female participants. CONCLUSION Our preliminary observation of significant DNA methylation changes in neuronal and immune genes in saliva samples supports our recently published genome-wide DNA methylations changes in blood samples from young AA male adults indicating that saliva offers a non-invasive means for DNA methylation prediction of exposure to environmental stressors in a gender-specific manner.
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Affiliation(s)
- Forough Saadatmand
- Department of Pediatrics, Howard University, Washington, D.C., United States of America
| | - Muneer Abbas
- Department of Microbiology & The National Human Genome Center, Howard University, Washington, D.C., United States of America
| | - Victor Apprey
- Department of Biochemistry and Molecular Biology, College of Medicine, Howard University, Washington, D.C., United States of America
| | - Krishma Tailor
- Department of Biochemistry and Molecular Biology, College of Medicine, Howard University, Washington, D.C., United States of America
| | - Bernard Kwabi-Addo
- Department of Biochemistry and Molecular Biology, College of Medicine, Howard University, Washington, D.C., United States of America
- * E-mail:
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Marchand A, Roulland I, Semence F, Beck O, Ericsson M. Use of Quantitative Dried Blood Spots to Evaluate the Post-Vaccination Level of Neutralizing Antibodies against SARS-CoV-2. Life (Basel) 2021; 11:life11111125. [PMID: 34833001 PMCID: PMC8620034 DOI: 10.3390/life11111125] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 10/12/2021] [Accepted: 10/15/2021] [Indexed: 12/23/2022] Open
Abstract
To combat the COVID-19 pandemic, vaccines against SARS-CoV-2 are now given to protect populations worldwide. The level of neutralizing antibodies following the vaccination will evolve with time and vary between individuals. Immunoassays quantifying immunoglobulins against the viral spike (S) protein in serum/plasma have been developed, but the need for venous blood samples could limit the frequency and scale of control in populations. The use of a quantitative dried blood spot (DBS) that can be self-collected would simplify this monitoring. The objective of this study was to determine whether a quantitative DBS device (Capitainer qDBS 10 µL) could be used in combination with an Elecsys anti-SARS-CoV-2 S immunoassay from Roche to follow the development and persistence of anti-S antibodies. This objective was carried out through two clinical studies. The first study investigated 14 volunteers who received two doses of the Comirnaty (Pfizer) vaccine. The levels of anti-S antibodies and the progression over time post-vaccination were studied for three months. The level of produced antibodies varied between subjects, but a similar trend was observed. The anti-S antibodies were highly stimulated by the second dose (×100) and peaked two weeks later. The antibody levels subsequently decreased and three months later were down to 65%. DBS proved to be sufficiently sensitive for use in evaluating the immune status against SARS-CoV-2 over a prolonged time. The second cohort was composed of 200 random patients from a clinical chemistry department in Stockholm. In this cohort, we had no information on previous COVID-19 infections or vaccination. Nevertheless, 87% of the subjects had anti-S immunoglobulins over 0.8 U/mL, and the bias between plasma and DBS proved to be variable, as was also seen in the first vaccination study.
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Affiliation(s)
- Alexandre Marchand
- Analysis Department, Agence Française de Lutte Contre le Dopage (AFLD), 143 Avenue Roger Salengro, 92290 Châtenay-Malabry, France; (I.R.); (F.S.); (M.E.)
- Correspondence: ; Tel.: +33-(0)146-600-520; Fax: +33-(0)146-603-017
| | - Ingrid Roulland
- Analysis Department, Agence Française de Lutte Contre le Dopage (AFLD), 143 Avenue Roger Salengro, 92290 Châtenay-Malabry, France; (I.R.); (F.S.); (M.E.)
| | - Florian Semence
- Analysis Department, Agence Française de Lutte Contre le Dopage (AFLD), 143 Avenue Roger Salengro, 92290 Châtenay-Malabry, France; (I.R.); (F.S.); (M.E.)
| | - Olof Beck
- Department of Clinical Neuroscience, Karolinska Institute, 171 77 Stockholm, Sweden;
| | - Magnus Ericsson
- Analysis Department, Agence Française de Lutte Contre le Dopage (AFLD), 143 Avenue Roger Salengro, 92290 Châtenay-Malabry, France; (I.R.); (F.S.); (M.E.)
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Scarrone M, González-Techera A, Alvez-Rosado R, Delfin-Riela T, Modernell Á, González-Sapienza G, Lassabe G. Development of anti-human IgM nanobodies as universal reagents for general immunodiagnostics. N Biotechnol 2021; 64:9-16. [PMID: 33984500 DOI: 10.1016/j.nbt.2021.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2020] [Revised: 04/09/2021] [Accepted: 05/08/2021] [Indexed: 10/21/2022]
Abstract
Nanobodies are the smallest antibody fragments which bind to antigens with high affinity and specificity. Due to their outstanding physicochemical stability, simplicity and cost-effective production, nanobodies have become powerful agents in therapeutic and diagnostic applications. In this work, the advantages of nanobodies were exploited to develop generic and standardized anti-human IgM reagents for serology and IgM+ B-cell analysis. Selection of anti-IgM nanobodies was carried out by evaluating their yields, stability, binding kinetics and cross-reactivity with other Ig isotypes. High affinity nanobodies were selected with dissociation constants (KDs) in the nM range and high sensitivities for detection of total IgM by ELISA. The nanobodies also proved to be useful for capturing IgM in the serodiagnosis of an acute infection as demonstrated by detection of specific IgM in sera of dengue virus patients. Finally, due to the lack of an Fc region, the selected nanobodies do not require Fc receptor blocking steps, facilitating the immunophenotyping of IgM+ cells by flow cytometry, an important means of diagnosis of immunodeficiencies and B-cell lymphoproliferative disorders. This work describes versatile anti-IgM nanobodies that, due to their recombinant nature and ease of reproduction at low cost, may represent an advantageous alternative to conventional anti-IgM antibodies in research and diagnosis.
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Affiliation(s)
- Martina Scarrone
- Department of Immunology, DEPBIO, Faculty of Chemistry, Hygiene Institute, UDELAR, Av. A. Navarro 3051, 11600, Montevideo, Uruguay
| | - Andrés González-Techera
- Department of Immunology, DEPBIO, Faculty of Chemistry, Hygiene Institute, UDELAR, Av. A. Navarro 3051, 11600, Montevideo, Uruguay
| | - Romina Alvez-Rosado
- Department of Immunology, DEPBIO, Faculty of Chemistry, Hygiene Institute, UDELAR, Av. A. Navarro 3051, 11600, Montevideo, Uruguay
| | - Triana Delfin-Riela
- Department of Immunology, DEPBIO, Faculty of Chemistry, Hygiene Institute, UDELAR, Av. A. Navarro 3051, 11600, Montevideo, Uruguay
| | | | - Gualberto González-Sapienza
- Department of Immunology, DEPBIO, Faculty of Chemistry, Hygiene Institute, UDELAR, Av. A. Navarro 3051, 11600, Montevideo, Uruguay.
| | - Gabriel Lassabe
- Department of Immunology, DEPBIO, Faculty of Chemistry, Hygiene Institute, UDELAR, Av. A. Navarro 3051, 11600, Montevideo, Uruguay.
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Amini F, Auma E, Hsia Y, Bilton S, Hall T, Ramkhelawon L, Heath PT, Le Doare K. Reliability of dried blood spot (DBS) cards in antibody measurement: A systematic review. PLoS One 2021; 16:e0248218. [PMID: 33720928 PMCID: PMC7959368 DOI: 10.1371/journal.pone.0248218] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 02/23/2021] [Indexed: 02/06/2023] Open
Abstract
Background Increasingly, vaccine efficacy studies are being recommended in low-and-middle-income countries (LMIC), yet often facilities are unavailable to take and store infant blood samples correctly. Dried blood spots (DBS), are useful for collecting blood from infants for diagnostic purposes, especially in low-income settings, as the amount of blood required is miniscule and no refrigeration is required. Little is known about their utility for antibody studies in children. This systematic review aims to investigate the correlation of antibody concentrations against infectious diseases in DBS in comparison to serum or plasma samples that might inform their use in vaccine clinical trials. Methods and findings We searched MEDLINE, Embase and the Cochrane library for relevant studies between January 1990 to October 2020 with no language restriction, using PRISMA guidelines, investigating the correlation between antibody concentrations in DBS and serum or plasma samples, and the effect of storage temperature on DBS diagnostic performance. We included 40 studies in this systematic review. The antibody concentration in DBS and serum/plasma samples reported a good pooled correlation, (r2 = 0.86 (ranged 0.43 to 1.00)). Ten studies described a decline of antibody after 28 days at room temperature compared to optimal storage at -20°C, where antibodies were stable for up to 200 days. There were only five studies of anti-bacterial antibodies. Conclusions There is a good correlation between antibody concentrations in DBS and serum/plasma samples, supporting the wider use of DBS in vaccine and sero-epidemiological studies, but there is limited data on anti-bacterial antibodies. The correct storage of DBS is critical and may be a consideration for longer term storage.
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Affiliation(s)
- Fahimah Amini
- Paediatric Infectious Disease Research Group, Institute for Infection and Immunity, St. George’s University of London, London, United Kingdom
- * E-mail:
| | - Erick Auma
- Department of Biology, University of Lyon, Université Claude Bernard Lyon, ENS de Lyon, CNRS, UMR, Lyon, France
| | - Yingfen Hsia
- Paediatric Infectious Disease Research Group, Institute for Infection and Immunity, St. George’s University of London, London, United Kingdom
- School of Pharmacy, Queen’s University Belfast, Belfast, United Kingdom
| | - Sam Bilton
- St Georges University Hospitals NHS Foundation Trust, Tooting, London, United Kingdom
| | - Tom Hall
- Paediatric Infectious Disease Research Group, Institute for Infection and Immunity, St. George’s University of London, London, United Kingdom
| | - Laxmee Ramkhelawon
- Paediatric Infectious Disease Research Group, Institute for Infection and Immunity, St. George’s University of London, London, United Kingdom
| | - Paul T. Heath
- Paediatric Infectious Disease Research Group, Institute for Infection and Immunity, St. George’s University of London, London, United Kingdom
- St Georges University Hospitals NHS Foundation Trust, Tooting, London, United Kingdom
| | - Kirsty Le Doare
- Paediatric Infectious Disease Research Group, Institute for Infection and Immunity, St. George’s University of London, London, United Kingdom
- St Georges University Hospitals NHS Foundation Trust, Tooting, London, United Kingdom
- Pathogen Immunology Group, Public Health England, Porton Down, United Kingdom
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Assessment of disease specific immune responses in enteric diseases using dried blood spot (DBS). PLoS One 2019; 14:e0218353. [PMID: 31206533 PMCID: PMC6578496 DOI: 10.1371/journal.pone.0218353] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2018] [Accepted: 05/30/2019] [Indexed: 01/30/2023] Open
Abstract
BACKGROUND Blood collection, transportation and storage remain a problem in countries where infrastructure, laboratory facilities and skilled manpower are scarce. This limits evaluation of immune responses in natural infections and vaccination in field studies. We developed methods to measure antigen specific antibody responses using dried blood spot (DBS) in cholera, ETEC and typhoid fever patients as well as recipients of oral cholera vaccine (OCV). METHODOLOGY/PRINCIPLE FINDINGS We processed heparinized blood for preparing DBS and plasma specimens from patients with, cholera, ETEC and typhoid as well as OCV recipients. We optimized the conventional vibriocidal method to measure vibriocidal antibody response in DBS eluates. We measured responses in DBS samples and plasma (range of titer of 5 to 10240). Vibriocidal titer showed strong agreement between DBS eluates and plasma in cholera patients (ICC = 0.9) and in OCV recipients (ICC = 0.8) using the Bland-Altman analysis and a positive correlation was seen (r = 0.7, p = 0.02 and r = 0.6, p = 0.006, respectively). We observed a strong agreement of lipopolysaccharide (LPS) and cholera toxin B (CTB)-specific antibody responses between DBS eluates and plasma in cholera patients and OCV recipients. We also found agreement of heat labile toxin B (LTB) and membrane protein (MP)-specific antibody responses in DBS eluates and plasma specimen of ETEC and typhoid patients respectively. CONCLUSION Our results demonstrate that dried blood specimens can be used as an alternate method for preservation of samples to measure antibody responses in enteric diseases and vaccine trials and can be applied to assessment of responses in humanitarian crisis and other adverse field settings.
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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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Vidova V, Stuchlikova E, Vrbova M, Almasi M, Klanova J, Thon V, Spacil Z. Multiplex Assay for Quantification of Acute Phase Proteins and Immunoglobulin A in Dried Blood Spots. J Proteome Res 2018; 18:380-391. [PMID: 30408962 DOI: 10.1021/acs.jproteome.8b00657] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
Inflammation is the first line defense mechanism against infection, tissue damage, or cancer development. However, inappropriate inflammatory response may also trigger diseases. The quantification of inflammatory proteins is essential to distinguish between harmful and beneficial immune response. Currently used immunoanalytical assays may suffer specificity issues due to antigen-antibody interaction and possible cross-reactivity of antibody with other protein species. In addition, immunoanalytical assays typically require invasive blood sampling and additional logistics; they are relatively costly and highly challenging to multiplex. We present a multiplex assay based on selected reaction monitoring (SRM) for quantification of seven acute-phase proteins (i.e., SAA1, SAA2-isoform1, SAA4, CRP, A1AT-isoform1, A1AG1, A1AG2) and the adaptive immunity effector IGHA1 in dried blood spots. This type of sample is readily available from all human subjects including newborns. The study utilizes proteotypic isotopically labeled peptides with trypsin-cleavable tag and presents optimized and reproducible workflow and several important practical remarks regarding quantitative SRM assays development. The panel of inflammatory proteins was quantified with sequence specificity capable to differentiate protein isoforms with intra- and interday precision (<16.4% coefficient of variation (CV) and <14.3% CV, respectively). Quantitative results were correlated with immuno-nephelometric assay (typically greater than 0.9 Pearson's R).
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Affiliation(s)
- Veronika Vidova
- Research Centre for Toxic Compounds in the Environment , Masaryk University , Brno , Czech Republic
| | - Eliska Stuchlikova
- Research Centre for Toxic Compounds in the Environment , Masaryk University , Brno , Czech Republic
| | - Marketa Vrbova
- Research Centre for Toxic Compounds in the Environment , Masaryk University , Brno , Czech Republic
| | - Martina Almasi
- Department of Clinical Hematology , University Hospital Brno , Brno , Czech Republic
| | - Jana Klanova
- Research Centre for Toxic Compounds in the Environment , Masaryk University , Brno , Czech Republic
| | - Vojtech Thon
- Research Centre for Toxic Compounds in the Environment , Masaryk University , Brno , Czech Republic
| | - Zdenek Spacil
- Research Centre for Toxic Compounds in the Environment , Masaryk University , Brno , Czech Republic
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John H, Willoh S, Hörmann P, Siegert M, Vondran A, Thiermann H. Procedures for Analysis of Dried Plasma Using Microsampling Devices to Detect Sulfur Mustard-Albumin Adducts for Verification of Poisoning. Anal Chem 2016; 88:8787-94. [DOI: 10.1021/acs.analchem.6b02199] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Harald John
- Bundeswehr Institute of Pharmacology and Toxicology, 80937 Munich, Germany
| | - Sophia Willoh
- University of Applied Sciences and Arts Coburg, Department
of Applied Sciences, Coburg, Germany
| | - Philipp Hörmann
- University of Applied Sciences Weihenstephan-Triesdorf, Department of Biotechnology and Bioinformatics, Weihenstephan, Germany
| | - Markus Siegert
- Department
of Chemistry, Humboldt-Universität zu Berlin, Berlin, Germany
| | - Antje Vondran
- University of Applied Sciences and Arts Coburg, Department
of Applied Sciences, Coburg, Germany
| | - Horst Thiermann
- Bundeswehr Institute of Pharmacology and Toxicology, 80937 Munich, Germany
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Bryan BA, Battersby A, Shillitoe BMJ, Barge D, Bourne H, Flood T, Cant AJ, Stroud C, Gennery AR. Respiratory Health and Related Quality of Life in Patients with Congenital Agammaglobulinemia in the Northern Region of the UK. J Clin Immunol 2016; 36:472-9. [PMID: 27091141 PMCID: PMC4896978 DOI: 10.1007/s10875-016-0284-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2016] [Accepted: 04/05/2016] [Indexed: 11/23/2022]
Abstract
Introduction Patients with congenital agammaglobulinemia, characterized by a defect in B lymphocyte differentiation causing B alymphocytosis, require life-long IgG replacement. There is scant literature regarding the effectiveness of IgG treatment at preventing mucosal (particularly sinopulmonary tract) infection and whether current management adequately restores “normal” health and quality of life (QoL). We aimed to document infective episodes pre- and post-commencing IgG replacement, determine any change in lung function and structure and assess respiratory status and QoL in a cohort of patients treated in Newcastle. Methods Clinical data were extracted from medical records of 15 patients identified from the immunology database, focusing on infective episodes, serial chest CT and spirometry results. Thirteen patients completed a selection of standardized and validated questionnaires assessing physical health, respiratory health and QoL. Results Pediatric patients on IgG therapy suffered fewer infections per patient year (0.74) than adults (2.13). 6/14 patients showed deteriorating respiratory status despite adequate therapy. Health questionnaires revealed a significant burden of respiratory disease on a patient’s life. Conclusion Clinical data showed patients with congenital agammaglobulinemia receiving immunoglobulin therapy retained a higher than average infection rate, most of which affected mucosal barriers. Most patients self-reported worse respiratory symptoms, a lower respiratory-related QoL and a lower general health QoL relative to a healthy population. Most participants had progressive structural lung damage and decreased lung function. These results suggest that current management is not entirely effective at preventing deterioration of respiratory health or restoring QoL.
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Affiliation(s)
- Branwen A Bryan
- Institute of Cellular Medicine, Newcastle University, 4th Floor, William Leech Building, Medical School, Framlington Place, Newcastle upon Tyne, E2 4HH, UK
| | - Alex Battersby
- Institute of Cellular Medicine, Newcastle University, 4th Floor, William Leech Building, Medical School, Framlington Place, Newcastle upon Tyne, E2 4HH, UK
| | - Benjamin Martin James Shillitoe
- Institute of Cellular Medicine, Newcastle University, 4th Floor, William Leech Building, Medical School, Framlington Place, Newcastle upon Tyne, E2 4HH, UK
| | - Dawn Barge
- Paediatric Immunology, Great North Children's Hospital, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, UK
| | - Helen Bourne
- Paediatric Immunology, Great North Children's Hospital, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, UK
| | - Terry Flood
- Paediatric Immunology, Great North Children's Hospital, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, UK
| | - Andrew J Cant
- Paediatric Immunology, Great North Children's Hospital, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, UK
| | - Catherine Stroud
- Paediatric Immunology, Great North Children's Hospital, Queen Victoria Road, Newcastle upon Tyne, NE1 4LP, UK
| | - Andrew R Gennery
- Institute of Cellular Medicine, Newcastle University, 4th Floor, William Leech Building, Medical School, Framlington Place, Newcastle upon Tyne, E2 4HH, UK. .,Great North Children's Hospital, Clinical Resource Building, Level 4, Block 2, Newcastle upon Tyne, NE1 4LP, UK.
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