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Tang J, Yang DZ, Lu C, Zheng W, Hu ZM, Xu YF, Li K, Wei JF, Xu ZQ. A Novel Quality Control Strategy for the Preparation of High-Quality Recombinant Allergens in Escherichia coli: A Case Study of Der f 2. Int Arch Allergy Immunol 2024:1-13. [PMID: 39047720 DOI: 10.1159/000539835] [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: 04/25/2024] [Accepted: 06/11/2024] [Indexed: 07/27/2024] Open
Abstract
INTRODUCTION Recombinant allergens produced by Escherichia coli (E. coli) system play an important role in the component-resolved diagnostics of allergy and vaccine development. However, incorrect folding of recombinant allergens may affect their application. Therefore, it is very important to monitor the correct folding of recombinant allergens. Currently, there is still a lack of a quality control strategy to solve this problem. In this study, a mite allergen, Der f 2, was taken as an example to establish a novel quality control strategy, which was based on chromatography to isolate the allergen, and on enzyme-linked immunosorbent assay to verify the IgE reactivity of the isolated allergen. METHODS The nucleotide sequence encoding Der f 2 was codon-optimized and cloned into pET-28a (+) plasmid. Best conditions for the expression of Der f 2 in E. coli were sought. The inclusion body of Der f 2 was denatured and purified by nickel affinity chromatography. Refolding processes were compared using glutathione redox system. The fully and partially folded proteins were separated by anion exchange chromatography, and the IgE reactivity of the isolated proteins was verified by indirect enzyme-linked immunosorbent assay. RESULTS An optimized 387 bp segment of the Der f 2 coding gene was successfully expressed in E. coli. Best induction conditions included preinduction bacterial density with absorbance value at 600 nm was 0.6, 1 mM isopropyl beta-d-thiogalactopyranoside at 28°C for 4 h. The Der f 2 protein after refolding was separated by chromatography and two fractions were obtained. The first fraction was identified as monomer protein and the second as aggregate by size-exclusion chromatography. Indirect enzyme-linked immunosorbent assay also confirmed that the first fraction showed higher IgE reactivity. CONCLUSION In this study, a novel quality control strategy based on chromatographic separation and IgE reactivity monitoring was established in the case of mite Der f 2, which systematically evaluated the effectiveness of multiple preparation methods for the first time. It is faster and more convenient when compared with the existing methods such as size-exclusion chromatography. This strategy laid a foundation for the stable application of recombinant allergens produced by E. coli in component-resolved diagnostics and the development of molecular vaccines in the future.
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Affiliation(s)
- Jian Tang
- Department of Pharmacy, The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, Nanjing, China
| | - De-Zheng Yang
- Department of Pharmacy, The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, Nanjing, China
| | - Chen Lu
- Precision Medicine Center, The First Affiliated Hospital of Gannan Medical University, Ganzhou, China
| | - Wei Zheng
- Department of Pharmacy, The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, Nanjing, China
| | - Zhi-Ming Hu
- Department of Pharmacy, The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, Nanjing, China
| | - Yi-Fei Xu
- Department of Pharmacy, The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, Nanjing, China
| | - Ke Li
- Department of Pharmacy, The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, Nanjing, China
| | - Ji-Fu Wei
- Department of Pharmacy, The Affiliated Cancer Hospital of Nanjing Medical University and Jiangsu Cancer Hospital and Jiangsu Institute of Cancer Research, Nanjing, China
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
- National Vaccine Innovation Platform, Nanjing Medical University, Nanjing, China
| | - Zhi-Qiang Xu
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
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Clemente-Suárez VJ, Mielgo-Ayuso J, Ramos-Campo DJ, Beltran-Velasco AI, Martínez-Guardado I, Navarro Jimenez E, Redondo-Flórez L, Yáñez-Sepúlveda R, Tornero-Aguilera JF. Basis of preventive and non-pharmacological interventions in asthma. Front Public Health 2023; 11:1172391. [PMID: 37920579 PMCID: PMC10619920 DOI: 10.3389/fpubh.2023.1172391] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 09/18/2023] [Indexed: 11/04/2023] Open
Abstract
Asthma is one of the most common atopic disorders in all stages of life. Its etiology is likely due to a complex interaction between genetic, environmental, and lifestyle factors. Due to this, different non-pharmacological interventions can be implemented to reduce or alleviate the symptoms caused by this disease. Thus, the present narrative review aimed to analyze the preventive and non-pharmacological interventions such as physical exercise, physiotherapy, nutritional, ergonutritional, and psychological strategies in asthma treatment. To reach these aims, an extensive narrative review was conducted. The databases used were MedLine (PubMed), Cochrane (Wiley), Embase, PsychINFO, and CinAhl. Asthma is an immune-mediated inflammatory condition characterized by increased responsiveness to bronchoconstrictor stimuli. Different factors have been shown to play an important role in the pathogenesis of asthma, however, the treatments used to reduce its incidence are more controversial. Physical activity is focused on the benefits that aerobic training can provide, while physiotherapy interventions recommend breathing exercises to improve the quality of life of patients. Nutritional interventions are targeted on implement diets that prioritize the consumption of fruits and vegetables and supplementation with antioxidants. Psychological interventions have been proposed as an essential non-pharmacological tool to reduce the emotional problems associated with asthma.
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Affiliation(s)
- Vicente Javier Clemente-Suárez
- Faculty of Sports Sciences, Universidad Europea de Madrid, Madrid, Spain
- Studies Centre in Applied Combat (CESCA), Toledo, Spain
| | - Juan Mielgo-Ayuso
- Department of Health Sciences, Faculty of Health Sciences, University of Burgos, Burgos, Spain
| | - Domingo Jesús Ramos-Campo
- LFE Research Group, Department of Health and Human Performance, Faculty of Physical Activity and Sport Science-INEF, Universidad Politécnica de Madrid, Madrid, Spain
| | | | - Ismael Martínez-Guardado
- BRABE Group, Department of Psychology, Faculty of Life and Natural Sciences, Universidad Camilo José Cela, Madrid, Spain
| | | | - Laura Redondo-Flórez
- Department of Health Sciences, Faculty of Biomedical and Health Sciences, Universidad Europea de Madrid, Madrid, Spain
| | | | - Jose Francisco Tornero-Aguilera
- Faculty of Sports Sciences, Universidad Europea de Madrid, Madrid, Spain
- Studies Centre in Applied Combat (CESCA), Toledo, Spain
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Correa A, Miranda J, Oliveira L, Moreira P, Vieira F, Cunha-Junior J, Resende R, Taketomi E. Identification of carboxymethyl (CM)-binding proteins derived from Lolium multiflorum pollen extract and antibody reactivity in Brazilian allergic patients. Braz J Med Biol Res 2023; 56:e12957. [PMID: 37851792 PMCID: PMC10578120 DOI: 10.1590/1414-431x2023e12957] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2023] [Accepted: 08/18/2023] [Indexed: 10/20/2023] Open
Abstract
Lolium multiflorum grass is the major pollen allergen source in the southern region of Brazil, but most of its allergens remain poorly characterized. The aim of this study was to investigate antibody reactivity to L. multiflorum crude and carboxymethyl-ligand extracts in allergic patients and healthy individuals. Ion exchange carboxymethyl (CM) chromatography (CM-Sepharose) was used to isolate proteins (S2) from L. multiflorum crude extract (S1), which were assessed by SDS-PAGE. S1- and S2-specific IgE and IgG4 levels were measured by ELISA using sera from 55 atopic and 16 non-atopic subjects. Reactive polypeptide bands in S1 and S2 were detected by immunoblotting, and the most prominent bands in S2 were analyzed by mass spectrometry (MS-MS). Similar IgE and IgG4 levels were observed to both S1 (IgE median absorbance: 1.22; IgG4 median absorbance: 0.68) and S2 (IgE median absorbance: 1.26; IgG4 median absorbance: 0.85) in atopic subjects. S1 and S2 had positive correlations for IgE and IgG4 (IgE: r=0.9567; IgG4: r=0.9229; P<0.0001) levels. Homology between S1 and S2 was confirmed by IgE (84%) and IgG4 (83%) inhibition. Immunoblotting revealed that the 29-32 kDa band was recognized by 100% of atopic subjects in both S1 and S2. MS-MS analysis identified similarity profile to groups 1 and 5 grass allergens. This study revealed that carboxymethyl-ligand fraction played an important role for pollen allergy diagnosis by containing clinically relevant allergens and constituted a promising candidate for allergen-specific immunotherapy.
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Affiliation(s)
- A.S. Correa
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
| | - J.S. Miranda
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
| | - L.A.R. Oliveira
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
| | - P.F.S. Moreira
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
| | - F.A.M. Vieira
- Departamento de Medicina, Universidade de Caxias do Sul, Caxias do Sul, RS, Brasil
| | - J.P. Cunha-Junior
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
| | - R.O. Resende
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
- Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, RJ, Brasil
| | - E.A. Taketomi
- Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
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Frisk CA, Adams-Groom B, Smith M. Isolating the species element in grass pollen allergy: A review. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 883:163661. [PMID: 37094678 DOI: 10.1016/j.scitotenv.2023.163661] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 04/17/2023] [Accepted: 04/18/2023] [Indexed: 05/03/2023]
Abstract
Grass pollen is a leading cause of allergy in many countries, particularly Europe. Although many elements of grass pollen production and dispersal are quite well researched, gaps still remain around the grass species that are predominant in the air and which of those are most likely to trigger allergy. In this comprehensive review we isolate the species aspect in grass pollen allergy by exploring the interdisciplinary interdependencies between plant ecology, public health, aerobiology, reproductive phenology and molecular ecology. We further identify current research gaps and provide open ended questions and recommendations for future research in an effort to focus the research community to develop novel strategies to combat grass pollen allergy. We emphasise the role of separating temperate and subtropical grasses, identified through divergence in evolutionary history, climate adaptations and flowering times. However, allergen cross-reactivity and the degree of IgE connectivity in sufferers between the two groups remains an area of active research. The importance of future research to identify allergen homology through biomolecular similarity and the connection to species taxonomy and practical implications of this to allergenicity is further emphasised. We also discuss the relevance of eDNA and molecular ecological techniques (DNA metabarcoding, qPCR and ELISA) as important tools in quantifying the connection between the biosphere with the atmosphere. By gaining more understanding of the connection between species-specific atmospheric eDNA and flowering phenology we will further elucidate the importance of species in releasing grass pollen and allergens to the atmosphere and their individual role in grass pollen allergy.
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Affiliation(s)
- Carl A Frisk
- Department of Urban Greening and Vegetation Ecology, Norwegian Institute of Bioeconomy Research, Ås, Norway.
| | - Beverley Adams-Groom
- School of Science and the Environment, University of Worcester, Worcester, United Kingdom
| | - Matt Smith
- School of Science and the Environment, University of Worcester, Worcester, United Kingdom
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Cerdeiro A, Farias M, Cunha V, Secchi G, Pacheco B, Alcalá C, Ganho R. Grass pollen sensitization in dogs in Paraná, Brazil: comparison between percutaneous and intradermal testing. ARQ BRAS MED VET ZOO 2021. [DOI: 10.1590/1678-4162-12111] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
ABSTRACT Canine atopic dermatitis is an inflammatory, genetic, pruritic and chronic dermatosis that affects between 10 and 30% of dogs and one of the most important allergens is grass pollen. The objective of this study was to evaluate the sensitization to grass pollen allergens in dogs with canine atopic dermatitis and to compare intradermal skin test (IDT) with percutaneous test (PT). For this study, ten healthy dogs and 39 dogs with atopic dermatitis were tested. Dogs were submitted to IDT and PT for Lolium multiflorum, Cynodon dactylon and Paspalum notatum. The IDT and PT tests were compared using the Proportion Test. All healthy dogs were negative to both tests. Ten atopic dogs (25.6%) responded positively to the PT and none were positive in IDT. C. dactylon, L. multiflorum and P. notatum were responsible for positive reactions in 70%, 70% and 30% of positive dogs, respectively. The number of positive reactions in PT were statistically higher than IDT (P<0.05). In conclusion, grass pollen can be important source of allergens for dogs in Paraná state (Brazil) and the PT showed higher sensitization to grass pollen in dogs with atopic dermatitis than IDT.
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Affiliation(s)
| | - M.R. Farias
- Pontifícia Universidade Católica do Paraná, Brazil
| | | | - G.V. Secchi
- Pontifícia Universidade Católica do Paraná, Brazil
| | - B.D. Pacheco
- Pontifícia Universidade Católica do Paraná, Brazil
| | | | - R.G.R. Ganho
- Pontifícia Universidade Católica do Paraná, Brazil
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Pinheiro CS, Silva ES, de Andrade Belitardo EMM, Pacheco LGC, Aguiar ERGR, Alcantara-Neves NM, Gadermaier G, Ferreira F. En route to personalized medicine: uncovering distinct IgE reactivity pattern to house dust mite components in Brazilian and Austrian allergic patients. Clin Transl Allergy 2021; 11:e12004. [PMID: 33900048 PMCID: PMC8099267 DOI: 10.1002/clt2.12004] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Accepted: 01/22/2021] [Indexed: 11/11/2022] Open
Abstract
AIM Molecular sensitization profile analyses of allergic individuals to the house dust mites (HDM) Blomia tropicalis and Dermatophagoides pteronyssinus from Brazil and Austria, in the attempt to comprehend the individual contribution of the molecular components in the diagnosis of HDM allergy. METHODOLOGY These analyses were made using a new in vitro multiplex allergen assay which allows simultaneous measurement of specific IgE against the whole allergen extract as well its components. RESULTS AND CONCLUSION The data showed that in Brazil the inclusion of the molecular components Blo t 5 and/or Blo t 21 major allergens and Blo t 2 can increase the sensitivity and specificity of the assay for the diagnosis of allergy to B. tropicalis, using matrix-based methodologies. Also we highlighted, for the first time, the importance of Blo t 2 analysis for a sensitive diagnosis, since some individuals were sensitized only to this molecular component. Regarding the sensitization profile of individuals sensitized to D. pteronyssinus, we point out the importance of analyzing the molecular components Der p23 and Der p 7, in addition to Der p 1 and Der p 2 for an accurate diagnosis based on matrices.
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Affiliation(s)
- Carina S Pinheiro
- Institute of Health Sciences - ICS, Federal University of Bahia, Salvador, Brazil
| | - Eduardo S Silva
- Institute of Health Sciences - ICS, Federal University of Bahia, Salvador, Brazil
| | | | - Luis G C Pacheco
- Institute of Health Sciences - ICS, Federal University of Bahia, Salvador, Brazil
| | - Eric R G R Aguiar
- Department of Biological Sciences, Santa Cruz State University, Ilhéus, Brazil
| | | | | | - Fatima Ferreira
- Department of Biosciences, University of Salzburg, Salzburg, Austria
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Eiringhaus K, Renz H, Matricardi P, Skevaki C. Component-Resolved Diagnosis in Allergic Rhinitis and Asthma. J Appl Lab Med 2018; 3:883-898. [PMID: 31639763 DOI: 10.1373/jalm.2018.026526] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2018] [Accepted: 08/15/2018] [Indexed: 11/06/2022]
Abstract
BACKGROUND Allergic rhinitis and asthma are highly prevalent chronic inflammatory diseases leading to restrictions in the patient's quality of life and high costs for healthcare systems. Both diseases are associated with the presence of specific IgE (sIgE) against aeroallergens. This review aims to examine the importance of molecular allergy diagnostics in the assessment and management of these disorders. CONTENT The "U-shaped" approach, proposed by the European Academy of Allergy and Clinical Immunology, combines conventional allergy diagnostics with the benefits of component-resolved diagnosis (CRD) and offers important additional information regarding the patient's sensitization pattern, especially in complex clinical cases such as polysensitization or idiopathic reactions, thus avoiding overuse of in vitro and in vivo IgE diagnostics. CRD may help the clinician to identify the cause of an allergy and, in the case of complex polysensitization, uncover possible cross-reactivity. Polysensitization, especially to inhalant allergens, is associated with the clinical appearance of asthma and allergic rhinitis; important risk factors for the latter are the major allergens Fel d 1 and Can f 1. Importantly, information on molecular sensitization patterns significantly influences the choice of specific immunotherapy and reduces its overprescription. CONCLUSION At present, allergy diagnostics largely rely on clinical history, physical examination, and in vivo IgE testing. However, in vitro diagnostics including CRD are currently finding their way into the clinical routine and can offer additional information on the patient's sensitization profile and treatment responsiveness.
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Affiliation(s)
- Kathrin Eiringhaus
- Institute of Laboratory Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Philipps Universität Marburg, German Center for Lung Research (DZL), Marburg, Germany
| | - Harald Renz
- Institute of Laboratory Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Philipps Universität Marburg, German Center for Lung Research (DZL), Marburg, Germany
| | - Paolo Matricardi
- Molecular Allergology and Immunomodulation, Departments of Pediatrics, Pulmonology, and Immunology, Charité - Medical School Berlin, Campus Virchow-Klinikum, Berlin, Germany
| | - Chrysanthi Skevaki
- Institute of Laboratory Medicine, Universities of Giessen and Marburg Lung Center (UGMLC), Philipps Universität Marburg, German Center for Lung Research (DZL), Marburg, Germany;
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Mothes-Luksch N, Jordakieva G, Hinterhölzl L, Jensen AN, Hallmann PK, Kundi M, Jensen-Jarolim E. Allergy diagnosis from symptoms to molecules, or from molecules to symptoms: a comparative clinical study. World Allergy Organ J 2018; 11:22. [PMID: 30214659 PMCID: PMC6131881 DOI: 10.1186/s40413-018-0199-y] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2018] [Accepted: 07/24/2018] [Indexed: 01/04/2023] Open
Abstract
Background Classical allergy diagnostic workup “from symptoms to molecules” comprises 1) clinical investigation, 2) skin prick- and IgE- testing, and recently, 3) molecular allergy testing. We aimed to examine the diagnostic fidelity of the alternative approach “from molecules to symptoms”, which was recently suggested in the EAACI Molecular Allergology User’s Guide, in a retrospective clinical study. Methods Records from 202 patients with clinically suspected allergic sensitizations were extracted from files at two sites applying either the “ISAC-first” workup with IgE-testing by immuno-solid phase allergen chip ISAC112 followed by selected skin prick tests (SPT) or the “SPT-first” starting with SPT followed by the microarray test. Results In the ISAC-first procedure significantly less SPTs were performed during allergy diagnosis (median 4 vs. 14). By SPT in 19% of patients in the ISAC-first group and in 34% in the SPT-first group additional respiratory allergens (p = 0.014) were detected not positive in ISAC microarray. By ISAC microarray test 18% additional sensitizations were found in the ISAC-first, and 32% in SPT-first cohort (p = 0.016). For food allergens 13 and 12% additional sensitizations were detected by the microarray not detected by SPT in the two groups (p = 0.800). No additional food allergen was found by SPT in the ISAC-first group, while in 6% of the cases in the SPT-first group detected sensitizations were negative in the microarray. Discussion The ISAC-first approach followed by (fewer) SPTs meets the demands for a patient’s tailored diagnostic work-up and therefore can be considered equivalent to the conventional way using the skin prick test as first screening tool, followed by IgE diagnosis. Conclusions For the diagnostic verification of clinically suspected allergy, the novel concept “from molecules to clinic” offers a reliable diagnostic workup in shorter time. Due to lower skin test numbers it is especially applicable for young children and seniors, in atopic patients, and whenever skin tests get difficult or unreliable. Electronic supplementary material The online version of this article (10.1186/s40413-018-0199-y) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- N Mothes-Luksch
- 1Institute of Pathophysiology and Allergy Research, Center of Pathophysiology, Infectiology and Immunology, Medical University Vienna, Währinger G. 18-20, 1090 Vienna, Austria.,AllergyCare, Allergy Diagnosis and Study Center, Vienna, Austria.,3Department of Dermatology, Division of Immunology, Allergy and Infectious Diseases, Medical University Vienna, Vienna, Austria
| | - G Jordakieva
- 4Institute of Occupational Medicine, Department of Internal Medicine II, Medical University of Vienna, Vienna, Austria
| | - L Hinterhölzl
- 1Institute of Pathophysiology and Allergy Research, Center of Pathophysiology, Infectiology and Immunology, Medical University Vienna, Währinger G. 18-20, 1090 Vienna, Austria
| | - A N Jensen
- AllergyCare, Allergy Diagnosis and Study Center, Vienna, Austria
| | - P K Hallmann
- AllergyCare, Allergy Diagnosis and Study Center, Vienna, Austria
| | - M Kundi
- 5Center for Public Health, Medical University Vienna, Vienna, Austria
| | - E Jensen-Jarolim
- 1Institute of Pathophysiology and Allergy Research, Center of Pathophysiology, Infectiology and Immunology, Medical University Vienna, Währinger G. 18-20, 1090 Vienna, Austria.,AllergyCare, Allergy Diagnosis and Study Center, Vienna, Austria.,The Interuniversity Messerli Research Institute, University of Veterinary Medicine Vienna, Medical University Vienna, Vienna, Austria
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Caniatti MCDCL, Borelli SD, Guilherme ALF, Franzener SB, Tsuneto LT. Association between KIR genes and dust mite sensitization in a Brazilian population. Hum Immunol 2017; 79:51-56. [PMID: 29100942 DOI: 10.1016/j.humimm.2017.10.018] [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: 06/12/2017] [Revised: 10/29/2017] [Accepted: 10/30/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND Killer cell immunoglobulin-like receptors (KIRs), found on the surface of natural killer (NK) cells, play a key role in controlling the innate response. Such response depends on a series of cellular interactions between these receptors and HLA activating/inhibiting ligands. Atopic diseases have been associated with genes that regulate cytokine production and HLA genes, which may either protect or predispose to hypersensitivity. OBJECTIVE To verify an association study of KIR genes with sensitization to the following mites: Dermatophagoides farinae, Dermatophagoides pteronyssinus, and Blomia tropicalis. METHODS A total of 341 children aged up to 14 years, were classified as mite-sensitive or mite-insensitive after undergoing a skin prick test for immediate allergic reactions. The presence/absence of KIR genes and their human leukocyte antigen (HLA) ligands was determined by polymerase chain reaction-sequence specific oligonucleotide (PCR-SSO) with the commercial kit LabType™ using Luminex™. RESULTS The frequencies of KIR genes and their respective class I HLA ligands and the frequency of haplotypes were performed in sensitive and insensitive individuals, and no significant differences were found. CONCLUSION Our results suggest no influence of KIR genes on resistance/susceptibility to sensitization to dust mites.
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Affiliation(s)
| | - Sueli Donizete Borelli
- Department of Basic Health Sciences, Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brazil
| | | | | | - Luiza Tamie Tsuneto
- Department of Basic Health Sciences, Universidade Estadual de Maringá (UEM), Maringá, Paraná, Brazil
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Jensen-Jarolim E, Jensen AN, Canonica GW. Debates in allergy medicine: Molecular allergy diagnosis with ISAC will replace screenings by skin prick test in the future. World Allergy Organ J 2017; 10:33. [PMID: 28959378 PMCID: PMC5604284 DOI: 10.1186/s40413-017-0162-3] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2017] [Accepted: 07/07/2017] [Indexed: 02/06/2023] Open
Abstract
In today's clinical practice patients' skin is used as screening organ for diagnosing type 1 allergy. According to European guidelines skin prick testing with a panel of 18 allergen extracts is recommended, in the US between 10 to 50 allergens are used. The specificity and sensitivity of skin testing is individually highly variable depending on age, body mass, and skin barrier status. In atopic inflammation skin testing gives more false positive results. Smaller skin area and strain limits prick testing in small children. Although the risk for systemic reactions in skin prick testing is very small, emergency medications must be available. Considering the fact that IgE is the only reliable biomarker for type I allergy, upfront IgE screening with ISAC, followed by fewer skin tests to approve positive sensitizations, is proposed. It is time to arrive in the age of molecular allergy diagnosis in daily patient care.
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Affiliation(s)
- E. Jensen-Jarolim
- Institute of Pathophysiology and Allergy Research, Center of Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
- The interuniversity Messerli Research Institute, University of Veterinary Medicine Vienna, Medical University Vienna, University of Vienna, Vienna, Austria
| | - A. N. Jensen
- AllergyCare, Allergy Diagnosis and Study Center, Vienna, Austria
| | - G. W. Canonica
- Personalized Medicine Asthma & Allergy Clinic, Humanitas University & Research Hospital, Rozzano, Milan, Italy
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Yang X, Fan G, Li J. Diagnostic value of Der p 1 and Der p 2 specific IgE in Dermatophagoides pteronyssinus IgE sensitization. Ann Allergy Asthma Immunol 2016; 116:295-301. [PMID: 27055990 DOI: 10.1016/j.anai.2016.02.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2015] [Revised: 02/06/2016] [Accepted: 02/15/2016] [Indexed: 02/07/2023]
Abstract
OBJECTIVE To assess the diagnostic performance of Der p 1 and Der p 2 specific IgE (sIgE). DATA SOURCES Studies were systematic computerized searches of the PubMed, EMBASE, and Cochrane libraries (published 1966 to September 5, 2015). STUDY SELECTION Records were screened by title and abstract and then by full-text articles of relevant studies. Eligible studies were selected according to inclusion criteria: (1) all house dust mite allergy diagnosed on the basis of clinical symptoms in combination with a dust mite extract skin prick test result; (2) the inclusion of controls in the study; and (3) enough data to construct the diagnostic 2 × 2 table. True-positive, false-positive, false-negative, and true-negative values were extracted from or calculated for each study. Then the pooled sensitivity, specificity, positive likelihood ratio, negative likelihood ratio, and diagnostic odds ratio were calculated. A summary receiver operating characteristic curve and area under the curve were used to evaluate the overall diagnostic performance. RESULTS Seven eligible studies that involved 1040 cases were included in this meta-analysis. The meta-analysis found that detection of Der p 1 or Der p 2 sIgE is of sufficient diagnostic accuracy for use in the diagnosis of Dermatophagoides pteronyssinus IgE sensitization. CONCLUSION Detection of Der p 1 or Der p 2 sIgE is a promising diagnostic tool in the diagnosis of D pteronyssinus IgE sensitization.
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Affiliation(s)
- Xin Yang
- National Center for Clinical Laboratories, Beijing Hospital, Beijing, People's Republic of China; Graduate School, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, People's Republic of China; Yantai Yuhuangding Hospital, Yantai, Shandong Province, People's Republic of China
| | - Gaowei Fan
- National Center for Clinical Laboratories, Beijing Hospital, Beijing, People's Republic of China; Graduate School, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, People's Republic of China
| | - Jinming Li
- National Center for Clinical Laboratories, Beijing Hospital, Beijing, People's Republic of China; Graduate School, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, People's Republic of China.
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