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Molecular Allergen-Specific IgE Recognition Profiles and Cumulative Specific IgE Levels Associated with Phenotypes of Cat Allergy. Int J Mol Sci 2022; 23:ijms23136984. [PMID: 35805985 PMCID: PMC9266786 DOI: 10.3390/ijms23136984] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Revised: 06/13/2022] [Accepted: 06/17/2022] [Indexed: 02/05/2023] Open
Abstract
Cat allergy is a major trigger factor for respiratory reactions (asthma and rhinitis) in patients with immunoglobulin E (IgE) sensitization. In this study, we used a comprehensive panel of purified cat allergen molecules (rFel d 1, nFel d 2, rFel d 3, rFel d 4, rFel d 7, and rFel d 8) that were obtained by recombinant expression in Escherichia coli or by purification as natural proteins to study possible associations with different phenotypes of cat allergy (i.e., rhinitis, conjunctivitis, asthma, and dermatitis) by analyzing molecular IgE recognition profiles in a representative cohort of clinically well-characterized adult cat allergic subjects (n = 84). IgE levels specific to each of the allergen molecules and to natural cat allergen extract were quantified by ImmunoCAP measurements. Cumulative IgE levels specific to the cat allergen molecules correlated significantly with IgE levels specific to the cat allergen extract, indicating that the panel of allergen molecules resembled IgE epitopes of the natural allergen source. rFel d 1 represented the major cat allergen, which was recognized by 97.2% of cat allergic patients; however, rFel d 3, rFel d 4, and rFel d 7 each showed IgE reactivity in more than 50% of cat allergic patients, indicating the importance of additional allergens in cat allergy. Patients with cat-related skin symptoms showed a trend toward higher IgE levels and/or frequencies of sensitization to each of the tested allergen molecules compared with patients suffering only from rhinitis or asthma, while there were no such differences between patients with rhinitis and asthma. The IgE levels specific to allergen molecules, the IgE levels specific to cat allergen extract, and the IgE levels specific to rFel d 1 were significantly higher in patients with four different symptoms compared with patients with 1–2 symptoms. This difference was more pronounced for the sum of IgE levels specific to the allergen molecules and to cat extract than for IgE levels specific for rFel d 1 alone. Our study indicates that, in addition to rFel d 1, rFel d 3, rFel d 4, and rFel d 7 must be considered as important cat allergens. Furthermore, the cumulative sum of IgE levels specific to cat allergen molecules seems to be a biomarker for identifying patients with complex phenotypes of cat allergy. These findings are important for the diagnosis of IgE sensitization to cats and for the design of allergen-specific immunotherapies for the treatment and prevention of cat allergy.
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Virtanen T. Inhalant Mammal-Derived Lipocalin Allergens and the Innate Immunity. FRONTIERS IN ALLERGY 2022; 2:824736. [PMID: 35387007 PMCID: PMC8974866 DOI: 10.3389/falgy.2021.824736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 12/30/2021] [Indexed: 12/03/2022] Open
Abstract
A major part of important mammalian respiratory allergens belongs to the lipocalin family of proteins. By this time, 19 respiratory mammalian lipocalin allergens have been registered in the WHO/IUIS Allergen Nomenclature Database. Originally, lipocalins, small extracellular proteins (molecular mass ca. 20 kDa), were characterized as transport proteins but they are currently known to exert a variety of biological functions. The three-dimensional structure of lipocalins is well-preserved, and lipocalin allergens can exhibit high amino acid identities, in several cases more than 50%. Lipocalins contain an internal ligand-binding site where they can harbor small principally hydrophobic molecules. Another characteristic feature is their capacity to bind to specific cell-surface receptors. In all, the physicochemical properties of lipocalin allergens do not offer any straightforward explanations for their allergenicity. Allergic sensitization begins at epithelial barriers where diverse insults through pattern recognition receptors awaken innate immunity. This front-line response is manifested by epithelial barrier-associated cytokines which together with other components of immunity can initiate the sensitization process. In the following, the crucial factor in allergic sensitization is interleukin (IL)-4 which is needed for stabilizing and promoting the type 2 immune response. The source for IL-4 has been searched widely. Candidates for it may be non-professional antigen-presenting cells, such as basophils or mast cells, as well as CD4+ T cells. The synthesis of IL-4 by CD4+ T cells requires T cell receptor engagement, i.e., the recognition of allergen peptides, which also provides the specificity for sensitization. Lipocalin and innate immunity-associated cell-surface receptors are implicated in facilitating the access of lipocalin allergens into the immune system. However, the significance of this for allergic sensitization is unclear, as the recognition by these receptors has been found to produce conflicting results. As to potential adjuvants associated with mammalian lipocalin allergens, the hydrophobic ligands transported by lipocalins have not been reported to enhance sensitization while it is justified to suppose that lipopolysaccharide plays a role in it. Taken together, type 2 immunity to lipocalin allergens appears to be a harmful immune response resulting from a combination of signals involving both the innate and adaptive immunities.
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Panaitescu C, Haidar L, Buzan MR, Grijincu M, Spanu DE, Cojanu C, Laculiceanu A, Bumbacea R, Agache IO. Precision medicine in the allergy clinic: the application of component resolved diagnosis. Expert Rev Clin Immunol 2022; 18:145-162. [PMID: 35078387 DOI: 10.1080/1744666x.2022.2034501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
INTRODUCTION A precise diagnosis is key for the optimal management of allergic diseases and asthma. In vivo or in vitro diagnostic methods that use allergen extracts often fail to identify the molecules eliciting the allergic reactions. AREAS COVERED Component-resolved diagnosis (CRD) has solved most of the limitations of extract-based diagnostic procedures and is currently valuable tool for the precision diagnosis in the allergy clinic, for venom and food allergy, asthma, allergic rhinitis, and atopic dermatitis. Its implementation in daily practice facilitates: a) the distinction between genuine multiple sensitizations and cross-reactive sensitization in polysensitized patients; b) the prediction of a severe, systemic reaction in food or insect venom allergy; c) the optimal selection of allergen immunotherapy based on the patient sensitization profile. This paper describes its main advantages and disadvantages, cost-effectiveness and future perspectives. EXPERT OPINION The diagnostic strategy based on CRD is part of the new concept of precision immunology, which aims to improve the management of allergic diseases.
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Affiliation(s)
- Carmen Panaitescu
- Department of Functional Sciences, Physiology, Center of Immuno-Physiology and Biotechnologies (CIFBIOTEH), "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania.,Centre for Gene and Cellular Therapies in The Treatment of Cancer - OncoGen, "Pius Brinzeu" Clinical Emergency Hospital, Timisoara, Romania
| | - Laura Haidar
- Department of Functional Sciences, Physiology, Center of Immuno-Physiology and Biotechnologies (CIFBIOTEH), "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania
| | - Maria Roxana Buzan
- Department of Functional Sciences, Physiology, Center of Immuno-Physiology and Biotechnologies (CIFBIOTEH), "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania.,Centre for Gene and Cellular Therapies in The Treatment of Cancer - OncoGen, "Pius Brinzeu" Clinical Emergency Hospital, Timisoara, Romania
| | - Manuela Grijincu
- Department of Functional Sciences, Physiology, Center of Immuno-Physiology and Biotechnologies (CIFBIOTEH), "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania.,Centre for Gene and Cellular Therapies in The Treatment of Cancer - OncoGen, "Pius Brinzeu" Clinical Emergency Hospital, Timisoara, Romania
| | | | - Catalina Cojanu
- Transylvania University Brasov - Faculty of Medicine, Brasov
| | | | - Roxana Bumbacea
- Department of Allergy, "Carol Davila" University of Medicine and Pharmacy Bucharest, Romania
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Brackett NF, Pomés A, Chapman MD. New Frontiers: Precise Editing of Allergen Genes Using CRISPR. FRONTIERS IN ALLERGY 2022; 2:821107. [PMID: 35386981 PMCID: PMC8974684 DOI: 10.3389/falgy.2021.821107] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2021] [Accepted: 12/24/2021] [Indexed: 11/14/2022] Open
Abstract
Genome engineering with clustered regularly interspaced short palindromic repeats (CRISPR) technology offers the unique potential for unequivocally deleting allergen genes at the source. Compared to prior gene editing approaches, CRISPR boasts substantial improvements in editing efficiency, throughput, and precision. CRISPR has demonstrated success in several clinical applications such as sickle cell disease and β-thalassemia, and preliminary knockout studies of allergenic proteins using CRISPR editing show promise. Given the advantages of CRISPR, as well as specific DNA targets in the allergen genes, CRISPR gene editing is a viable approach for tackling allergy, which may lead to significant disease improvement. This review will highlight recent applications of CRISPR editing of allergens, particularly cat allergen Fel d 1, and will discuss the advantages and limitations of this approach compared to existing treatment options.
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Guedes PEB, Veloso JF, Lacerda LC, Santana JO, Mora-Ocampo IY, Pirovani CP, Cruz RDS, Munhoz AD, Carlos RSA. Protein expression of the tear film of domestic cats before and after inoculation with Toxoplasma gondii. BMC Vet Res 2021; 17:386. [PMID: 34906132 PMCID: PMC8670102 DOI: 10.1186/s12917-021-03080-9] [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] [Received: 08/24/2021] [Accepted: 11/17/2021] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND Tear film (TF) helps maintain and protect ocular function against damage to the ocular surface. Proteins are one of its main constituents, whose expression pattern can be used as a biomarker of ocular changes and systemic diseases. The aim of this study was to evaluate the expression of proteins in the TF of domestic cats before and after infection with Toxoplasma gondii, in the phases of acute infection and chronicity. Twelve healthy cats received orally homogenized brain matter obtained from mice inoculated with T. gondii oocysts, strain ME49. Cat feces were collected daily from the third day after infection to assess the release of oocysts. TF samples were obtained from cats, by Schirmer's Tear Test 1, on day 0 (before infection), day 5 after infection (acute phase of infection, with maximum peak release of oocysts in feces) and on day 21 after infection (start of chronic phase, 7 days after total absence of oocyst release in feces). Tear samples were also submitted to proteomic analysis in a Q-Tof-Premier mass spectrometer. RESULTS A total of 37 proteins with scores equal to or greater than 100 were identified on D0, followed by 36 on D5 and 42 on D21. Of these, 27 were common to D0 and D5, 33 to D0 and D21, 27 to D5 and D21, and 26 were common to the three groups, totaling 54 proteins. The most abundant proteins were lipocalin allergen Fel d, serum albumin, aldehyde dehydrogenase, lactoperoxidase and lactotransferrin. There was no significant difference in the abundance of proteins found on D0 and D5, but there was a statistical difference between D0 and D21 for ACT1_AEDAE, CERU_HUMAN and GELS_HUMAN. Regarding D5 and D21, there were significant differences for KV1_CANLF, LAC_PIG, TRFL_PIG, ACT1_AEDAE, CERU_HUMAN, GELS_HUMAN and OVOS2_HUMAN. CONCLUSIONS The main proteins identified in the TF of domestic cats are similar to those found in humans and other animal species. Most are part of the ocular surface defense system against injuries. The most expressed proteins in animals in the chronic phase of T. gondii infection are associated with the immune response to the parasite.
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Affiliation(s)
| | - Jéssica Fontes Veloso
- Federal University of Western Bahia, Av. 23 de Agosto, S/N, Assunção, Bahia Barra, Brazil
| | | | | | | | | | | | - Alexandre Dias Munhoz
- Department of Agricultural and Environmental Sciences, Santa Cruz State University, Ilhéus, Brazil
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Tear Film Proteome of Healthy Domestic Cats. Vet Med Int 2021; 2021:8708023. [PMID: 34326982 PMCID: PMC8302406 DOI: 10.1155/2021/8708023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2021] [Accepted: 07/07/2021] [Indexed: 01/11/2023] Open
Abstract
The aim of this study was to investigate the proteins found in tear film of healthy domestic cats. Schirmer tear test strips were used to collect tear samples of twelve healthy cats, which were mixed, centrifuged, and placed in a single 1.5 mL microtube that was frozen at −20°C, until analysis by two-dimensional polyacrylamide gel and mass spectrometry associated with high-performance liquid chromatography. The resulting spectra were analyzed and compared with the Swiss-Prot search tool. Forty peptides were detected in the analyzed protein fragments of 90 spots, with 16 proteins identified. Of these, the authors confirmed what has been already found in other studies: lactotransferrin, serum albumin, allergenic lipocalins, and neutrophil gelatinase-associated lipocalin. Others were considered novel in tear film samples of all species: cyclin-dependent protein kinase, serine/arginine repetitive matrix protein, apelin receptor, secretory protein related to C1q/TNF, Wee1, α-1,4 glucan phosphorylase, and WD repeat domain 1. The network was divided into 11 clusters, and a biological function was assigned. Most of the proteins have functions in the defense and maintenance of feline ocular surface homeostasis. Serum albumin is a bottleneck protein, with a high betweenness value. This paper is a pioneer in reporting, in-depth, the tear film proteome of domestic cats.
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Schoos AMM, Nwaru BI, Borres MP. Component-resolved diagnostics in pet allergy: Current perspectives and future directions. J Allergy Clin Immunol 2021; 147:1164-1173. [PMID: 33444632 DOI: 10.1016/j.jaci.2020.12.640] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2020] [Revised: 11/30/2020] [Accepted: 12/23/2020] [Indexed: 12/14/2022]
Abstract
Furry mammals kept as pets are important allergen sources. The prevalence of sensitization to dander from various animals appears to be increasing worldwide. Several mammalian allergens from diverse species and distinct protein families have been characterized, and some are available for component-resolved diagnostics (CRD). This review presents an overview of mammalian aeroallergens, with a focus on cat, dog, and horse allergens. The potential of CRD in fine-tuning the diagnostic workup following traditional methods based on whole- allergen extracts and allergen immunotherapy is discussed. The review highlights the clinical utility of CRD, particularly as a marker/predictor of increased asthma risk and disease severity. Finally, several perspectives of the future implications of CRD are offered in the context of furry animal allergens.
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Affiliation(s)
- Ann-Marie M Schoos
- COpenhagen Prospective Studies on Asthma in Childhood (COPSAC), Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark; Department of Pediatrics, Slagelse Sygehus, Slagelse, Denmark.
| | - Bright I Nwaru
- Krefting Research Centre, Institute of Medicine, University of Gothenburg, Gothenburg, Sweden; Wallenberg Centre for Molecular and Translational Medicine, University of Gothenburg, Gothenburg, Sweden
| | - Magnus P Borres
- Thermo Fisher Scientific, Uppsala, Sweden; Department of Maternal and Child Health, Uppsala University, Uppsala, Sweden
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Zhu DX, Li L, Xu ZQ, Zhang C, Zhang JS, Sun JL, Wei JF. Cat-NPC2, a Newly Identified Allergen, With High Cross-Reactivity to Can f 7. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2021; 13:122-140. [PMID: 33191681 PMCID: PMC7680833 DOI: 10.4168/aair.2021.13.1.122] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2020] [Revised: 05/21/2020] [Accepted: 06/15/2020] [Indexed: 12/20/2022]
Abstract
Purpose Pet-derived allergens are the common indoor inhalant allergens. Among them, cat and dog allergens constitute more than 80% of animal allergic patients, which greatly affect the quality-of-life of patients and increase the burden of social health care. The aim of this study was to identify Cat-Niemann pick type C2 (NPC2) protein, a homologue of Can f 7, as a new allergen. Methods Cat-NPC2 complementary DNA (cDNA) was cloned and optimized for amplification and expression in Escherichia coli. Then, recombinant Cat-NPC2 (rCat-NPC2) was purified by Ni2+ affinity chromatography. The allergenicity was assessed by enzyme-linked immunosorbent assay (ELISA), western blot and basophil activation test (BAT). Based on the sequence similarity, the cross-reactivity between Cat-NPC2 and Can f 7 was investigated by inhibition ELISA. Circular dichroism spectroscopy and homology modeling were used to characterize the structure of Cat-NPC2. Results The cDNA sequence of Cat-NPC2 was cloned with a 450-bp open reading frame coding for 149 amino acids (GenBank MN_737596). The condon-optimized NPC2 gene was subcloned and expressed in E. coli with a molecular weight of 18.9 kDa. The native Cat-NPC2 was detected in cat dander extracts. The allergenicity determined by ELISA, western blot and BAT suggested at least 14.5% cat-allergic patients displayed high specific immunoglobulin E (IgE) recognition of Cat-NPC2. The predicted structure of Cat-NPC2 was found to consist of 7 β-strands arranged in 2 β-sheets. An ELISA based assay showed that rCat-NPC2 bound to cholesterol in a dose dependent manner. Based on the structure and sequence similarities, IgE cross-reactivity was demonstrated between Cat-NPC2 and Can f 7/Der f 2. Conclusions In the study, a novel cat allergen, belonging to the NPC2 protein family, was identified and characterized at both molecular and immunological levels. The study will offer a deeper understanding of cat allergens and improve a component-resolved diagnosis in pet allergy.
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Affiliation(s)
- Dan Xuan Zhu
- Women & Children Central Laboratory, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Lin Li
- Department of Emergency Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Zhi Qiang Xu
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Cheng Zhang
- Women & Children Central Laboratory, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China
| | - Jin Song Zhang
- Department of Emergency Medicine, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
| | - Jin Lyu Sun
- Department of Allergy, Peking Union Medical College Hospital, Chinese Academy of Medical Sciences, Beijing, China.
| | - Ji Fu Wei
- Research Division of Clinical Pharmacology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, China.
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González JPS, Hernández EB, Abellán AC, Peñalver-Mellado M. Immunogenicity of a new allergoid from Felis domesticus. Allergol Immunopathol (Madr) 2020; 48:612-618. [PMID: 32446784 DOI: 10.1016/j.aller.2020.02.008] [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: 11/05/2019] [Revised: 01/30/2020] [Accepted: 02/06/2020] [Indexed: 11/30/2022]
Abstract
BACKGROUND The chemical modification of allergens with glutaraldehyde improves safety while maintaining clinical efficacy, which permits the administration of higher doses of immunotherapy, reducing the risk of adverse reactions. The aim of this study is to evaluate the immunogenic capacity of a new cat dander polymer by immunizing mice and quantifying immunoglobulins in serum, in comparison with the non-modified allergen. METHODS The study consists of the immunization of three mice groups with the polymerized and the native extract, together with a negative control group. The immunoglobulin levels in serum have been measured by indirect ELISA. By means of the non-parametric Mann-Whitney U test, it was determined if there were significant differences in the values of specific antibodies between groups. RESULTS The group immunized with the allergoid showed significantly higher specific IgG and IgG1 values to dander allergens and specific IgG to the major allergen Fel d 1, while there were no significant changes in IgG2a and IgE values. These results could be due to a higher immunization dose. The vaccine formulation was based on the optimal defined dose for clinical efficacy of allergen immunotherapy. CONCLUSIONS This preclinical study carried out with the present assay has established that the allergoid of cat dander extract, as designed for its optimal use in allergen immunotherapy, produces a higher specific IgG than the native extract, in addition to showing significantly higher specific IgG1 levels, evidencing a greater effectiveness in immunization.
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Affiliation(s)
- J P Sola González
- Probelte Pharma S.L.U., S/Antonio Belmonte Abellán, 3-7, 30100 Murcia, Spain
| | - E Bravo Hernández
- Probelte Pharma S.L.U., S/Antonio Belmonte Abellán, 3-7, 30100 Murcia, Spain.
| | - A Cerezo Abellán
- Probelte Pharma S.L.U., S/Antonio Belmonte Abellán, 3-7, 30100 Murcia, Spain
| | - M Peñalver-Mellado
- Probelte Pharma S.L.U., S/Antonio Belmonte Abellán, 3-7, 30100 Murcia, Spain
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Habeler M, Lindner HH, Redl B. A role of heparan sulphate proteoglycan in the cellular uptake of lipocalins ß-lactoglobulin and allergen Fel d 4. Biol Chem 2020; 401:1081-1092. [PMID: 32229688 DOI: 10.1515/hsz-2020-0132] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2020] [Accepted: 03/16/2020] [Indexed: 01/22/2023]
Abstract
Lipocalins, small extracellular hydrophobic molecule carriers, can be internalized by a variety of different cells. However, to date receptors have only been identified for human lipocalins. Here, we specifically investigated uptake mechanisms for lipocalins ß-lactoglobulin and Fel d 4 in HeLa and Chinese hamster ovary (CHO) cells. We provide evidence that cell surface heparan sulphate proteoglycan is essential for internalization of these lipocalins. In HeLa cells, lipocalin uptake was inhibited by competition with soluble heparin, enzymatic digestion of cellular heparan sulphate by heparinase and inhibition of its biosynthesis by sodium chlorate. Biochemical studies by heparin affinity chromatography and colocalization studies further supported a role of heparan sulphate proteoglycan in lipocalin uptake. Finally, lipocalin uptake was blocked in CHO mutant cells defective in glycosaminoglycan biosynthesis whereas in wild-type cells it was clearly detectable. Thus, cell surface heparan sulphate proteoglycan represents a novel component absolutely participating in the cellular uptake of some lipocalins.
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Affiliation(s)
- Matthias Habeler
- Institute of Molecular Biology, Medical University Innsbruck, Innrain 80, A-6020, Innsbruck, Austria
| | - Herbert H Lindner
- Institute of Clinical Biochemistry, Medical University Innsbruck, Innrain 80, A-6020, Innsbruck, Austria
| | - Bernhard Redl
- Institute of Molecular Biology, Medical University Innsbruck, Innrain 80, A-6020, Innsbruck, Austria
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Gao X, Yin M, Yang P, Li X, Di L, Wang W, Cui H, Yan X, Liu J. Effect of Exposure to Cats and Dogs on the Risk of Asthma and Allergic Rhinitis: A Systematic Review and Meta-analysis. Am J Rhinol Allergy 2020; 34:703-714. [PMID: 32564683 DOI: 10.1177/1945892420932487] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
BACKGROUND Controversies persist regarding whether exposure to cat or dog increases the risk of asthma and allergic rhinitis. OBJECTIVE This meta-analysis aimed to assess the associations between exposure to cats or dogs and the development of asthma and allergic rhinitis. METHODS A systematic review was performed to identify case-control and cohort studies before May 2019, evaluating the association between exposure to cats and dogs and the risk of asthma and rhinitis. The risk of bias was assessed using the Newcastle-Ottawa Scale. The odds ratios (ORs) and risk ratios (RRs) were pooled for case-control and cohort studies, respectively. Subgroup analyses were performed on prespecified study-level characteristics. RESULTS The meta-analysis of 34 cohort studies showed a protective role of exposure to cats [RR: 0.88, 95% confidence interval (CI): 0.77-0.99] or dogs (RR: 0.85, 95% CI: 0.73-0.97) in the development of asthma. The subgroup analysis of birth cohort (RR: 0.74, 95% CI: 0.56-0.93) and children population (RR: 0.83, 95% CI: 0.70-0.96) also suggested a favorable role of exposure to dogs in the development of asthma. Pooled evidence from 13 case-control studies indicated no significant impact of cats (OR: 1.66, 95% CI: 0.39-2.94) and dogs (OR: 1.22, 95% CI: 0.92-1.52) on the development of asthma. A pooled analysis of five cohort studies showed a favorable effect of exposure to cats (RR: 0.60, 95% CI: 0.33-0.86) or dogs (RR: 0.68, 95% CI 0.44-0.90) on the development of allergic rhinitis. CONCLUSION The findings indicated a protective effect of exposure to cats and dogs, especially ownership, on the development of asthma and allergic rhinitis.
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Affiliation(s)
- Xiaoping Gao
- Department of Otorhinolaryngology Head and Neck Surgery, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Mei Yin
- Department of Respiratory and Critical Care Medicine, the Cardiovascular and Cerebrovascular Disease, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Pei Yang
- Department of Otorhinolaryngology Head and Neck Surgery, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Xia Li
- Department of Otolaryngology, The Third People's Hospital of Yinchuan, Yinchuan, China
| | - Lingling Di
- Department of Otorhinolaryngology Head and Neck Surgery, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Wei Wang
- Department of Otorhinolaryngology Head and Neck Surgery, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Hua Cui
- Department of Respiratory and Critical Care Medicine, the Cardiovascular and Cerebrovascular Disease, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Xiaohui Yan
- Department of Otorhinolaryngology Head and Neck Surgery, General Hospital of Ningxia Medical University, Yinchuan, China
| | - Jing Liu
- Department of Otorhinolaryngology Head and Neck Surgery, General Hospital of Ningxia Medical University, Yinchuan, China
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Caraballo L, Valenta R, Puerta L, Pomés A, Zakzuk J, Fernandez-Caldas E, Acevedo N, Sanchez-Borges M, Ansotegui I, Zhang L, van Hage M, Abel-Fernández E, Karla Arruda L, Vrtala S, Curin M, Gronlund H, Karsonova A, Kilimajer J, Riabova K, Trifonova D, Karaulov A. The allergenic activity and clinical impact of individual IgE-antibody binding molecules from indoor allergen sources. World Allergy Organ J 2020; 13:100118. [PMID: 32373267 PMCID: PMC7195550 DOI: 10.1016/j.waojou.2020.100118] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2020] [Revised: 03/27/2020] [Accepted: 03/30/2020] [Indexed: 02/07/2023] Open
Abstract
A large number of allergens have been discovered but we know little about their potential to induce inflammation (allergenic activity) and symptoms. Nowadays, the clinical importance of allergens is determined by the frequency and intensity of their IgE antibody binding (allergenicity). This is a rather limited parameter considering the development of experimental allergology in the last 20 years and the criteria that support personalized medicine. Now it is known that some allergens, in addition to their IgE antibody binding properties, can induce inflammation through non IgE mediated pathways, which can increase their allergenic activity. There are several ways to evaluate the allergenic activity, among them the provocation tests, the demonstration of non-IgE mediated pathways of inflammation, case control studies of IgE-binding frequencies, and animal models of respiratory allergy. In this review we have explored the current status of basic and clinical research on allergenic activity of indoor allergens and confirm that, for most of them, this important property has not been investigated. However, during recent years important advances have been made in the field, and we conclude that for at least the following, allergenic activity has been demonstrated: Der p 1, Der p 2, Der p 5 and Blo t 5 from HDMs; Per a 10 from P. americana; Asp f 1, Asp f 2, Asp f 3, Asp f 4 and Asp f 6 from A. fumigatus; Mala s 8 and Mala s 13 from M. sympodialis; Alt a 1 from A. alternata; Pen c 13 from P. chrysogenum; Fel d 1 from cats; Can f 1, Can f 2, Can f 3, Can f 4 and Can f 5 from dogs; Mus m 1 from mice and Bos d 2 from cows. Defining the allergenic activity of other indoor IgE antibody binding molecules is necessary for a precision-medicine-oriented management of allergic diseases.
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Affiliation(s)
- Luis Caraballo
- Institute for Immunological Research, University of Cartagena, Cartagena, Colombia
- Corresponding author. Institute for Immunological Research, University of Cartagena, Cartagena de Indias, Colombia.
| | - Rudolf Valenta
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
- NRC Institute of Immunology FMBA of Russia, Moscow, Russian Federation
- Department of Clinical Immunology and Allergy, Laboratory of Immunopathology, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Leonardo Puerta
- Institute for Immunological Research, University of Cartagena, Cartagena, Colombia
| | - Anna Pomés
- Indoor Biotechnologies, Inc. Charlottesville, VA, USA
| | - Josefina Zakzuk
- Institute for Immunological Research, University of Cartagena, Cartagena, Colombia
| | | | - Nathalie Acevedo
- Institute for Immunological Research, University of Cartagena, Cartagena, Colombia
| | - Mario Sanchez-Borges
- Allergy and Clinical Immunology Department, Centro Médico Docente La Trinidad, Caracas, Venezuela
| | - Ignacio Ansotegui
- Department of Allergy & Immunology Hospital Quironsalud Bizkaia, Bilbao, Spain
| | - Luo Zhang
- Department of Otolaryngology Head and Neck Surgery, Beijing Tongren Hospital, Capital Medical University, Beijing, 100730, China
| | - Marianne van Hage
- Department of Medicine Solna, Division of Immunology and Allergy, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - Eva Abel-Fernández
- Inmunotek, Madrid, Spain and University of South Florida College of Medicine, Tampa, USA
| | - L. Karla Arruda
- Ribeirão Preto Medical School, University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Susanne Vrtala
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Mirela Curin
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Hans Gronlund
- Department of Clinical Neuroscience, Karolinska Institute, Stockholm, Sweden
| | - Antonina Karsonova
- Department of Clinical Immunology and Allergy, Laboratory of Immunopathology, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Jonathan Kilimajer
- Inmunotek, Madrid, Spain and University of South Florida College of Medicine, Tampa, USA
| | - Ksenja Riabova
- Department of Clinical Immunology and Allergy, Laboratory of Immunopathology, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Daria Trifonova
- Department of Clinical Immunology and Allergy, Laboratory of Immunopathology, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Alexander Karaulov
- Department of Clinical Immunology and Allergy, Laboratory of Immunopathology, Sechenov First Moscow State Medical University, Moscow, Russia
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13
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Thoms F, Haas S, Erhart A, Nett CS, Rüfenacht S, Graf N, Strods A, Patil G, Leenadevi T, Fontaine MC, Toon LA, Jennings GT, Senti G, Kündig TM, Bachmann MF. Immunization of Cats against Fel d 1 Results in Reduced Allergic Symptoms of Owners. Viruses 2020; 12:v12030288. [PMID: 32155887 PMCID: PMC7150904 DOI: 10.3390/v12030288] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2020] [Revised: 02/20/2020] [Accepted: 02/26/2020] [Indexed: 12/23/2022] Open
Abstract
An innovative approach was tested to treat cat allergy in humans by vaccinating cats with Fel-CuMV (HypoCatTM), a vaccine against the major cat allergen Fel d 1 based on virus-like particles derived from cucumber mosaic virus (CuMV-VLPs). Upon vaccination, cats develop neutralizing antibodies against the allergen Fel d 1, which reduces the level of reactive allergen, thus lowering the symptoms or even preventing allergic reactions in humans. The combined methodological field study included ten cat-allergic participants who lived together with their cats (n = 13), that were immunized with Fel-CuMV. The aim was to determine methods for measuring a change in allergic symptoms. A home-based provocation test (petting time and organ specific symptom score (OSSS)) and a general weekly (or monthly) symptom score (G(W)SS) were used to assess changes in allergic symptoms. The petting time until a pre-defined level of allergic symptoms was reached increased already early after vaccination of the cats and was apparent over the course of the study. In addition, the OSSS after provocation and G(W)SS recorded a persistent reduction in symptoms over the study period and could serve for long-term assessment. Hence, the immunization of cats with HypoCatTM (Fel-CuMV) may have a positive impact on the cat allergy of the owner, and changes could be assessed by the provocation test as well as G(W)SS.
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Affiliation(s)
- Franziska Thoms
- Department of Dermatology, Zurich University Hospital, Wagistrasse 12, 8952 Schlieren/Zurich, Switzerland; (F.T.); (S.H.); (G.T.J.)
- HypoPet AG, Moussonstrasse 2, 8091 Zurich, Switzerland
| | - Stefanie Haas
- Department of Dermatology, Zurich University Hospital, Wagistrasse 12, 8952 Schlieren/Zurich, Switzerland; (F.T.); (S.H.); (G.T.J.)
- HypoPet AG, Moussonstrasse 2, 8091 Zurich, Switzerland
| | - Aline Erhart
- Clinical Trials Center Zurich, University Hospital Zurich, Moussonstrasse 2, 8044 Zurich, Switzerland;
| | - Claudia S. Nett
- vetderm.ch, Ennetseeklink für Kleintiere, Rothusstrasse 2, 6331 Hünenberg, Switzerland;
| | - Silvia Rüfenacht
- dermaVet, Tierklinik Aarau West AG, Muhenstrasse 56, 5036 Oberentfelden, Switzerland;
| | - Nicole Graf
- Graf Biostatistics, Amelenweg 5, 8400 Winterthur, Switzerland;
| | - Arnis Strods
- Benchmark Animal Health, Benchmark Holdings Plc, 8 Smithy Wood Dr, Sheffield S35 1QN, UK; (A.S.); (G.P.); (T.L.); (M.C.F.); (L.A.T.)
| | - Gauravraj Patil
- Benchmark Animal Health, Benchmark Holdings Plc, 8 Smithy Wood Dr, Sheffield S35 1QN, UK; (A.S.); (G.P.); (T.L.); (M.C.F.); (L.A.T.)
| | - Thonur Leenadevi
- Benchmark Animal Health, Benchmark Holdings Plc, 8 Smithy Wood Dr, Sheffield S35 1QN, UK; (A.S.); (G.P.); (T.L.); (M.C.F.); (L.A.T.)
| | - Michael C. Fontaine
- Benchmark Animal Health, Benchmark Holdings Plc, 8 Smithy Wood Dr, Sheffield S35 1QN, UK; (A.S.); (G.P.); (T.L.); (M.C.F.); (L.A.T.)
| | - Lindsey A. Toon
- Benchmark Animal Health, Benchmark Holdings Plc, 8 Smithy Wood Dr, Sheffield S35 1QN, UK; (A.S.); (G.P.); (T.L.); (M.C.F.); (L.A.T.)
| | - Gary T. Jennings
- Department of Dermatology, Zurich University Hospital, Wagistrasse 12, 8952 Schlieren/Zurich, Switzerland; (F.T.); (S.H.); (G.T.J.)
- HypoPet AG, Moussonstrasse 2, 8091 Zurich, Switzerland
| | - Gabriela Senti
- Director Research and Education, University Hospital Zurich, Rämistrasse 100, 8091 Zurich, Switzerland;
| | - Thomas M. Kündig
- Department of Dermatology, University Hospital Zurich, Gloriastrasse 31, 8091 Zurich, Switzerland;
| | - Martin F. Bachmann
- Department of Immunology, Inselspital, University of Bern, Salihaus 2, 3007 Bern, Switzerland
- Jenner Institute, University of Oxford, Old Road Campus, Roosevelt Drive, Oxford OX3 7BN, UK
- Correspondence:
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14
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Immunization of Cats against Fel d 1 Results in Reduced Allergic Symptoms of Owners. Viruses 2020. [PMID: 32155887 DOI: 10.3390/v12030288.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
An innovative approach was tested to treat cat allergy in humans by vaccinating cats with Fel-CuMV (HypoCatTM), a vaccine against the major cat allergen Fel d 1 based on virus-like particles derived from cucumber mosaic virus (CuMV-VLPs). Upon vaccination, cats develop neutralizing antibodies against the allergen Fel d 1, which reduces the level of reactive allergen, thus lowering the symptoms or even preventing allergic reactions in humans. The combined methodological field study included ten cat-allergic participants who lived together with their cats (n = 13), that were immunized with Fel-CuMV. The aim was to determine methods for measuring a change in allergic symptoms. A home-based provocation test (petting time and organ specific symptom score (OSSS)) and a general weekly (or monthly) symptom score (G(W)SS) were used to assess changes in allergic symptoms. The petting time until a pre-defined level of allergic symptoms was reached increased already early after vaccination of the cats and was apparent over the course of the study. In addition, the OSSS after provocation and G(W)SS recorded a persistent reduction in symptoms over the study period and could serve for long-term assessment. Hence, the immunization of cats with HypoCatTM (Fel-CuMV) may have a positive impact on the cat allergy of the owner, and changes could be assessed by the provocation test as well as G(W)SS.
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15
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Vachová M, Panzner P, Vlas T, Vítovcová P. Analysis of Sensitization Profiles in Central European Allergy Patients Focused on Animal Allergen Molecules. Int Arch Allergy Immunol 2020; 181:278-284. [PMID: 32018259 DOI: 10.1159/000505518] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 12/17/2019] [Indexed: 12/27/2022] Open
Abstract
INTRODUCTION Frequently observed multiple sensitizations to several animals highlights the importance of a molecular diagnosis, distinguishing between sensitizations specific to single species and sensitizations due to cross-reactivity. OBJECTIVE The aim of our study was to assess the usefulness of a molecular diagnosis in the description of sensitization profiles in allergy patients living in Central Europe, with a particular focus on animal-derived molecules. METHODS The molecular diagnosis was performed using the ImmunoCAP ISAC microarray. Results of 1,255 allergy patients were subjected to statistical analysis. RESULTS The highest sensitization rates were observed for uteroglobin Fel d 1 (31.8%) and kallikrein Can f 5 (16.4%), followed by animal lipocalins Can f 1 (13.9%), Equ c 1 (6.2%), Fel d 4 (5.3%), Can f 2 (4.2%), and Mus m 1 (4.1%). Sensitization rates to serum albumins Fel d 2, Can f 3, Equ c 3, and Bos d 6 were very low, with the highest being 3.2% to Fel d 2. Detailed subanalysis confirmed the dominant role of Fel d 1 or Can f 5 and/or Can f 1 in cat- or dog-sensitized patients, respectively. Further analysis focused on lipocalins and albumins confirmed a high rate of cosensitizations within both groups. CONCLUSION The sensitization to animal allergen molecules is very frequent in Central Europe. The most common is sensitization to species-specific cat uteroglobin Fel d 1 and dog kallikrein Can f 5, followed by sensitizations to animal lipocalins. Our data suggest that commonly observed multiple sensitizations detected by extract approach can be explained not only by true cosensitization, but also by cross-reactivity, mainly in the frame of lipocalins. Cross-reactive serum albumins are minor sensitizers and are probably not important from this point of view.
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Affiliation(s)
- Martina Vachová
- Department of Immunology and Allergology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia,
| | - Petr Panzner
- Department of Immunology and Allergology, Faculty of Medicine in Pilsen, Charles University, Pilsen, Czechia
| | - Tomáš Vlas
- Department of Immunology and Allergology, University Hospital in Pilsen, Pilsen, Czechia
| | - Petra Vítovcová
- Department of Immunology and Allergology, University Hospital in Pilsen, Pilsen, Czechia
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Scheib H, Nekaris KAI, Rode-Margono J, Ragnarsson L, Baumann K, Dobson JS, Wirdateti W, Nouwens A, Nijman V, Martelli P, Ma R, Lewis RJ, Kwok HF, Fry BG. The Toxicological Intersection between Allergen and Toxin: A Structural Comparison of the Cat Dander Allergenic Protein Fel d1 and the Slow Loris Brachial Gland Secretion Protein. Toxins (Basel) 2020; 12:toxins12020086. [PMID: 32012831 PMCID: PMC7076782 DOI: 10.3390/toxins12020086] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2019] [Revised: 01/22/2020] [Accepted: 01/23/2020] [Indexed: 12/27/2022] Open
Abstract
Slow lorises are enigmatic animal that represent the only venomous primate lineage. Their defensive secretions have received little attention. In this study we determined the full length sequence of the protein secreted by their unique brachial glands. The full length sequences displayed homology to the main allergenic protein present in cat dander. We thus compared the molecular features of the slow loris brachial gland protein and the cat dander allergen protein, showing remarkable similarities between them. Thus we postulate that allergenic proteins play a role in the slow loris defensive arsenal. These results shed light on these neglected, novel animals.
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Affiliation(s)
- Holger Scheib
- Venom Evolution Lab, School of Biological Sciences, University of Queensland, St Lucia, Qld 4072, Australia; (H.S.); (K.B.); (J.S.D.)
| | - K. Anne-Isola Nekaris
- Nocturnal Primate Research Group, Department of Social Sciences, Oxford Brookes University, Oxford OX3 0BP, UK; (K.A.-I.N.); (J.R.-M.); (V.N.)
- Centre for Functional Genomics, Department of Health and Life Sciences, Oxford Brookes University, Oxford OX3 0BP, UK
| | - Johanna Rode-Margono
- Nocturnal Primate Research Group, Department of Social Sciences, Oxford Brookes University, Oxford OX3 0BP, UK; (K.A.-I.N.); (J.R.-M.); (V.N.)
- The North of England Zoological Society / Chester Zoo, Chester CH2 1LH, UK
| | - Lotten Ragnarsson
- Institute for Molecular Biosciences, University of Queensland, St Lucia QLD 4072, Australia; (L.R.)
| | - Kate Baumann
- Venom Evolution Lab, School of Biological Sciences, University of Queensland, St Lucia, Qld 4072, Australia; (H.S.); (K.B.); (J.S.D.)
| | - James S. Dobson
- Venom Evolution Lab, School of Biological Sciences, University of Queensland, St Lucia, Qld 4072, Australia; (H.S.); (K.B.); (J.S.D.)
| | | | - Amanda Nouwens
- School of Chemistry and Molecular Biosciences, University of Queensland, St Lucia, Qld 4072, Australia;
| | - Vincent Nijman
- Nocturnal Primate Research Group, Department of Social Sciences, Oxford Brookes University, Oxford OX3 0BP, UK; (K.A.-I.N.); (J.R.-M.); (V.N.)
- Centre for Functional Genomics, Department of Health and Life Sciences, Oxford Brookes University, Oxford OX3 0BP, UK
| | | | - Rui Ma
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Avenida de Universidade, Taipa, Macau SAR;
| | - Richard J. Lewis
- Institute for Molecular Biosciences, University of Queensland, St Lucia QLD 4072, Australia; (L.R.)
| | - Hang Fai Kwok
- Institute of Translational Medicine, Faculty of Health Sciences, University of Macau, Avenida de Universidade, Taipa, Macau SAR;
- Correspondence: (H.F.K.); (B.G.F.)
| | - Bryan Grieg Fry
- Venom Evolution Lab, School of Biological Sciences, University of Queensland, St Lucia, Qld 4072, Australia; (H.S.); (K.B.); (J.S.D.)
- Correspondence: (H.F.K.); (B.G.F.)
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17
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Thoms F, Jennings GT, Maudrich M, Vogel M, Haas S, Zeltins A, Hofmann-Lehmann R, Riond B, Grossmann J, Hunziker P, Fettelschoss-Gabriel A, Senti G, Kündig TM, Bachmann MF. Immunization of cats to induce neutralizing antibodies against Fel d 1, the major feline allergen in human subjects. J Allergy Clin Immunol 2019; 144:193-203. [PMID: 31056187 DOI: 10.1016/j.jaci.2019.01.050] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Revised: 01/18/2019] [Accepted: 01/23/2019] [Indexed: 11/25/2022]
Abstract
BACKGROUND Cat allergy in human subjects is usually caused by the major cat allergen Fel d 1 and is found in approximately 10% of the Western population. Currently, there is no efficient and safe therapy for cat allergy available. Allergic patients usually try to avoid cats or treat their allergy symptoms. OBJECTIVE We developed a new strategy to treat Fel d 1-induced allergy in human subjects by immunizing cats against their own major allergen, Fel d 1. METHODS A conjugate vaccine consisting of recombinant Fel d 1 and a virus-like particle derived from the cucumber mosaic virus containing the tetanus toxin-derived universal T-cell epitope tt830-843 (CuMVTT) was used to immunize cats. A first tolerability and immunogenicity study, including a boost injection, was conducted by using the Fel-CuMVTT vaccine alone or in combination with an adjuvant. RESULTS The vaccine was well tolerated and had no overt toxic effect. All cats induced a strong and sustained specific IgG antibody response. The induced anti-Fel d 1 antibodies were of high affinity and exhibited a strong neutralization ability tested both in vitro and in vivo. A reduction in the endogenous allergen level and a reduced allergenicity of tear samples, were observed. CONCLUSION Vaccination of cats with Fel-CuMVTT induces neutralizing antibodies and might result in reduced symptoms of allergic cat owners. Both human subjects and animals could profit from this treatment because allergic cat owners would reduce their risk of developing chronic diseases, such as asthma, and become more tolerant of their cats, which therefore could stay in the households and not need to be relinquished to animal shelters.
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Affiliation(s)
- Franziska Thoms
- Department of Dermatology, Zurich University Hospital, Schlieren, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland; HypoPet AG, Zurich, Switzerland.
| | - Gary T Jennings
- Department of Dermatology, Zurich University Hospital, Schlieren, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland; HypoPet AG, Zurich, Switzerland
| | - Melanie Maudrich
- Department of Dermatology, Zurich University Hospital, Schlieren, Switzerland
| | - Monique Vogel
- Department of Immunology, Inselspital, University of Bern, Bern, Switzerland
| | - Stefanie Haas
- Department of Dermatology, Zurich University Hospital, Schlieren, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland; HypoPet AG, Zurich, Switzerland
| | - Andris Zeltins
- Latvian Biomedical Research & Study Centre, Riga, Latvia
| | - Regina Hofmann-Lehmann
- Clinical Laboratory, Department of Clinical Diagnostics and Services, Vetsuisse Faculty, University of Zurich, Switzerland
| | - Barbara Riond
- Clinical Laboratory, Department of Clinical Diagnostics and Services, Vetsuisse Faculty, University of Zurich, Switzerland
| | - Jonas Grossmann
- Functional Genomics Center Zurich, University of Zurich/ETH Zurich, Zurich, Switzerland
| | - Peter Hunziker
- Functional Genomics Center Zurich, University of Zurich/ETH Zurich, Zurich, Switzerland
| | - Antonia Fettelschoss-Gabriel
- Department of Dermatology, Zurich University Hospital, Schlieren, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Gabriela Senti
- Clinical Trials Center, University Hospital Zurich, Zurich, Switzerland
| | - Thomas M Kündig
- Department of Dermatology, University Hospital, Zurich, Switzerland; Faculty of Medicine, University of Zurich, Zurich, Switzerland
| | - Martin F Bachmann
- HypoPet AG, Zurich, Switzerland; Department of Immunology, Inselspital, University of Bern, Bern, Switzerland; Jenner Institute, University of Oxford, Oxford, United Kingdom.
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18
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Kelly SM, Karsh J, Marcelo J, Boeckh D, Stepner N, Santone B, Yang J, Yang WH. Fel d 1 and Fel d 4 levels in cat fur, saliva, and urine. J Allergy Clin Immunol 2018; 142:1990-1992.e3. [PMID: 30176277 DOI: 10.1016/j.jaci.2018.07.033] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2017] [Revised: 06/20/2018] [Accepted: 07/13/2018] [Indexed: 12/20/2022]
Affiliation(s)
| | | | | | | | | | | | - Jimmy Yang
- Red Maple Trials, Ottawa, Ontario, Canada
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19
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Tsolakis N, Malinovschi A, Nordvall L, Mattsson L, Lidholm J, Pedroletti C, Janson C, Borres MP, Alving K. Sensitization to minor cat allergen components is associated with type-2 biomarkers in young asthmatics. Clin Exp Allergy 2018; 48:1186-1194. [PMID: 29575179 DOI: 10.1111/cea.13135] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 02/10/2018] [Accepted: 03/03/2018] [Indexed: 12/17/2022]
Abstract
BACKGROUND Cat allergy is a major trigger of asthma world-wide. Molecular patterns of cat sensitization vary between individuals, but their relationship to inflammation in asthmatics has not been extensively studied. OBJECTIVE To investigate the prevalence and levels of IgE antibodies against different cat allergen components and their relationship to type-2 inflammation and total IgE among young asthmatic subjects sensitized to furry animals. METHODS Patients with asthma (age 10-35 years; n = 266) and IgE sensitization to cat, dog or horse extract (ImmunoCAP), were analysed for IgE to the cat allergen components Fel d 1 (secretoglobin), Fel d 2 (serum albumin), Fel d 4 and Fel d 7 (lipocalins). Independent associations between IgE-antibody concentrations, and fraction of exhaled nitric oxide (FeNO), blood eosinophil (B-Eos) count, and total IgE were analysed by multiple linear regression after adjustment for possible confounders. RESULTS The level of IgE against Fel d 2 was independently related to FeNO (P = .012) and total IgE (P < .001), and IgE against Fel d 4 associated with Β-Eos count (P = .009) and total IgE (P < .001). IgE antibodies against Fel d 1 or cat extract did not independently relate to these inflammatory markers (P = .23-.51). CONCLUSIONS Levels of IgE to lipocalin (Fel d 4) and serum albumin (Fel d 2), but not to secretoglobin (Fel d 1) or cat extract, were independently associated with type-2 biomarkers and total IgE in young asthmatics. CLINICAL RELEVANCE We suggest that measurement of IgE to minor cat allergen components may be useful when investigating asthma morbidity in cat allergic subjects.
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Affiliation(s)
- N Tsolakis
- Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - A Malinovschi
- Medical Sciences, Uppsala University, Uppsala, Sweden
| | - L Nordvall
- Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - L Mattsson
- Thermo Fisher Scientific, Uppsala, Sweden
| | - J Lidholm
- Thermo Fisher Scientific, Uppsala, Sweden
| | - C Pedroletti
- Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - C Janson
- Medical Sciences, Uppsala University, Uppsala, Sweden
| | - M P Borres
- Women's and Children's Health, Uppsala University, Uppsala, Sweden.,Thermo Fisher Scientific, Uppsala, Sweden
| | - K Alving
- Women's and Children's Health, Uppsala University, Uppsala, Sweden
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20
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Virtanen T. Immunotherapy for pet allergies. Hum Vaccin Immunother 2018; 14:807-814. [PMID: 29182437 PMCID: PMC5893203 DOI: 10.1080/21645515.2017.1409315] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2017] [Revised: 10/27/2017] [Accepted: 11/21/2017] [Indexed: 12/13/2022] Open
Abstract
Allergic diseases compose a serious challenge for modern societies. Their individual, medical and economical burden is large. As humans spend most of their time indoors, exposure to indoor allergens is a significant contributor to the development of allergic sensitization and respiratory allergies, such as allergic rhinoconjunctivitis and asthma. One important source of indoor allergens are pets, in particular cats and dogs. Allergens from these and other mammals spread effectively and they are encountered widely in public places. If patient education, allergen avoidance and pharmacotherapy do not suffice for controlling the symptoms of pet allergy, allergen immunotherapy can be a treatment option. Current information on allergen immunotherapy in pet allergy suggests that it can be effective in reducing allergic symptoms. However, the low number of high-quality randomized controlled trials of allergen immunotherapy in pet allergy warrants for further investigations.
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Affiliation(s)
- Tuomas Virtanen
- University of Eastern Finland, School of Medicine, Institute of Clinical Medicine, Department of Clinical Microbiology, Kuopio, Finland
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21
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Chan SK, Leung DYM. Dog and Cat Allergies: Current State of Diagnostic Approaches and Challenges. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2018; 10:97-105. [PMID: 29411550 PMCID: PMC5809771 DOI: 10.4168/aair.2018.10.2.97] [Citation(s) in RCA: 60] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/25/2017] [Accepted: 10/11/2017] [Indexed: 12/19/2022]
Abstract
Allergies to dogs and cats affect 10%-20% of the population worldwide and is a growing public health concern as these rates increase. Given the prevalence of detectable dog and cat allergens even in households without pets, there is a critical need to accurately diagnose and treat patients to reduce morbidity and mortality from exposure. The ability to diagnose cat sensitization is good, in contrast to dogs. Component resolved diagnostics of sensitization to individual allergenic proteins will dramatically improve diagnosis. This review focuses on the current state of knowledge regarding allergies to dogs and cats, recent advances, therapies such as subcutaneous immunotherapy, and discusses important areas to improve diagnosis and therapy.
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Affiliation(s)
- Sanny K Chan
- Department of Pediatrics, University of Colorado Denver School of Medicine, Aurora, CO. USA
| | - Donald Y M Leung
- Department of Pediatrics, University of Colorado Denver School of Medicine, Aurora, CO. USA
- Division of Pediatric Allergy-Immunology, National Jewish Health, Denver, CO, USA.
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22
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Wise SK, Lin SY, Toskala E, Orlandi RR, Akdis CA, Alt JA, Azar A, Baroody FM, Bachert C, Canonica GW, Chacko T, Cingi C, Ciprandi G, Corey J, Cox LS, Creticos PS, Custovic A, Damask C, DeConde A, DelGaudio JM, Ebert CS, Eloy JA, Flanagan CE, Fokkens WJ, Franzese C, Gosepath J, Halderman A, Hamilton RG, Hoffman HJ, Hohlfeld JM, Houser SM, Hwang PH, Incorvaia C, Jarvis D, Khalid AN, Kilpeläinen M, Kingdom TT, Krouse H, Larenas-Linnemann D, Laury AM, Lee SE, Levy JM, Luong AU, Marple BF, McCoul ED, McMains KC, Melén E, Mims JW, Moscato G, Mullol J, Nelson HS, Patadia M, Pawankar R, Pfaar O, Platt MP, Reisacher W, Rondón C, Rudmik L, Ryan M, Sastre J, Schlosser RJ, Settipane RA, Sharma HP, Sheikh A, Smith TL, Tantilipikorn P, Tversky JR, Veling MC, Wang DY, Westman M, Wickman M, Zacharek M. International Consensus Statement on Allergy and Rhinology: Allergic Rhinitis. Int Forum Allergy Rhinol 2018; 8:108-352. [PMID: 29438602 PMCID: PMC7286723 DOI: 10.1002/alr.22073] [Citation(s) in RCA: 210] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 12/01/2017] [Accepted: 12/01/2017] [Indexed: 02/06/2023]
Abstract
BACKGROUND Critical examination of the quality and validity of available allergic rhinitis (AR) literature is necessary to improve understanding and to appropriately translate this knowledge to clinical care of the AR patient. To evaluate the existing AR literature, international multidisciplinary experts with an interest in AR have produced the International Consensus statement on Allergy and Rhinology: Allergic Rhinitis (ICAR:AR). METHODS Using previously described methodology, specific topics were developed relating to AR. Each topic was assigned a literature review, evidence-based review (EBR), or evidence-based review with recommendations (EBRR) format as dictated by available evidence and purpose within the ICAR:AR document. Following iterative reviews of each topic, the ICAR:AR document was synthesized and reviewed by all authors for consensus. RESULTS The ICAR:AR document addresses over 100 individual topics related to AR, including diagnosis, pathophysiology, epidemiology, disease burden, risk factors for the development of AR, allergy testing modalities, treatment, and other conditions/comorbidities associated with AR. CONCLUSION This critical review of the AR literature has identified several strengths; providers can be confident that treatment decisions are supported by rigorous studies. However, there are also substantial gaps in the AR literature. These knowledge gaps should be viewed as opportunities for improvement, as often the things that we teach and the medicine that we practice are not based on the best quality evidence. This document aims to highlight the strengths and weaknesses of the AR literature to identify areas for future AR research and improved understanding.
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Affiliation(s)
| | | | | | | | - Cezmi A. Akdis
- Allergy/Asthma, Swiss Institute of Allergy and Asthma Research, Switzerland
| | | | - Antoine Azar
- Allergy/Immunology, Johns Hopkins University, USA
| | | | | | | | | | - Cemal Cingi
- Otolaryngology, Eskisehir Osmangazi University, Turkey
| | | | | | | | | | | | | | - Adam DeConde
- Otolaryngology, University of California San Diego, USA
| | | | | | | | | | | | | | - Jan Gosepath
- Otorhinolaryngology, Helios Kliniken Wiesbaden, Germany
| | | | | | | | - Jens M. Hohlfeld
- Respiratory Medicine, Hannover Medical School, Airway Research Fraunhofer Institute for Toxicology and Experimental Medicine, German Center for Lung Research, Germany
| | | | | | | | | | | | | | | | | | | | | | | | | | - Amber U. Luong
- Otolaryngology, McGovern Medical School at the University of Texas Health Science Center Houston, USA
| | | | | | | | - Erik Melén
- Pediatric Allergy, Karolinska Institutet, Sweden
| | | | | | - Joaquim Mullol
- Otolaryngology, Universitat de Barcelona, Hospital Clinic, IDIBAPS, Spain
| | | | | | | | - Oliver Pfaar
- Rhinology/Allergy, Medical Faculty Mannheim, Heidelberg University, Center for Rhinology and Allergology, Wiesbaden, Germany
| | | | | | - Carmen Rondón
- Allergy, Regional University Hospital of Málaga, Spain
| | - Luke Rudmik
- Otolaryngology, University of Calgary, Canada
| | - Matthew Ryan
- Otolaryngology, University of Texas Southwestern, USA
| | - Joaquin Sastre
- Allergology, Hospital Universitario Fundacion Jiminez Diaz, Spain
| | | | | | - Hemant P. Sharma
- Allergy/Immunology, Children's National Health System, George Washington University School of Medicine, USA
| | | | | | | | | | | | - De Yun Wang
- Otolaryngology, National University of Singapore, Singapore
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Abstract
Olfaction is a fundamental sense in most animal species. In mammals, the olfactory system comprises several subpopulations of sensory neurons located throughout the nasal cavity, which detect a variety of chemostimuli, including odorants, intraspecies and interspecies chemical communication cues. Some of these compounds are important for regulating innate and learned behaviors, and endocrine changes in response to other animals in the environment. With a particular focus on laboratory rodent species, this chapter provides a comprehensive description of the most important behavioral assays used for studying the olfactory system, and is meant to be a practical guide for those who study olfaction-mediated behaviors or who have an interest in deciphering the molecular, cellular, or neural mechanisms through which the sense of smell controls the generation of adaptive behavioral outputs.
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Affiliation(s)
- Fabio Papes
- Department of Genetics and Evolution, Institute of Biology, University of Campinas, Campinas, SP, Brazil.
| | - Thiago S Nakahara
- Department of Genetics and Evolution, Institute of Biology, University of Campinas, Campinas, SP, Brazil
- Graduate Program in Genetics and Molecular Biology, Institute of Biology, University of Campinas, Campinas, SP, Brazil
| | - Antonio P Camargo
- Department of Genetics and Evolution, Institute of Biology, University of Campinas, Campinas, SP, Brazil
- Graduate Program in Genetics and Molecular Biology, Institute of Biology, University of Campinas, Campinas, SP, Brazil
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Dolgova AS, Sudina AE, Cherkashina AS, Stukolova OA. Component-resolved microarray analysis of IgE sensitization profiles to Felis catus major allergen molecules in Russian cat-allergic patients. Scandinavian Journal of Clinical and Laboratory Investigation 2017; 78:81-86. [PMID: 29228796 DOI: 10.1080/00365513.2017.1414955] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
We aimed to determine the profile of IgE reactivity to three major cat allergens, Fel d 1, Fel d 2 and Fel d 4, in cat-allergic patients in the Moscow region in Russia. sIgE levels to recombinant proteins expressed in Escherichia coli (Fel d 1 and Fel d 4) and to Fel d 2 protein purified from cat serum were measured using a microarray method developed in our laboratory. Sera from 174 anonymous subjects with a positive reaction (≥0.35 IU/mL) to cat dander extract (e1, ImmunoCAP) and 56 negative controls were used for IgE testing. Fel d 1 was recognized by 92.5%, Fel d 2 by 29.9% and Fel d 4 by 39.1% of the tested patient sera. The sensitivity to these three proteins was approximately 98% compared to cat dander extract (correlation coefficient to ImmunoCAP is 0.94 with PPV = 0.99 and NPV = 0.95). These predictive values appeared to be even more statistically significant than the divergence between the ISAC IgE test and the extract-based singleplex ImmunoCAP. The combination of the three investigated proteins (Fel d 1, Fel d 2 and Fel d 4) is suitable for in vitro molecular (serological) diagnosis of cat allergy in this region as a complement to cat dander extract. Moreover, with this method, we found distinction between Fel d 2 and other Feline sIgEs formation.
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Affiliation(s)
- Anna Sergeevna Dolgova
- a Molecular Diagnostics and Epidemiology Department , Central Research Institute of Epidemiology , Moscow , Russia
| | - Anna Evgenevna Sudina
- a Molecular Diagnostics and Epidemiology Department , Central Research Institute of Epidemiology , Moscow , Russia
| | | | - Olga Alekseevna Stukolova
- a Molecular Diagnostics and Epidemiology Department , Central Research Institute of Epidemiology , Moscow , Russia.,b Research Institute of Occupational Health , Moscow , Russia
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25
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Allergy to pets and new allergies to uncommon pets. Allergol Select 2017; 1:214-221. [PMID: 30402618 PMCID: PMC6040002 DOI: 10.5414/alx01842e] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 02/22/2016] [Indexed: 12/16/2022] Open
Abstract
Abstract. Animal dander is an important source of respiratory allergens, and sensitization to allergens from cat and/or dog during childhood represents a risk factor for the development of asthma and rhinitis later in life. The identification and characterization of allergenic components is crucial to improve diagnosis and therapy in patients with allergy to pets. Allergens from furry animals belong to a restricted number of protein families, a large majority are lipocalins or albumins, some are secretoglobins or latherins. Animal dander contains cross-reactive molecules and current efforts aim at defining species-specific allergens that have a high diagnostic sensitivity. Component-resolved diagnosis allows to discriminate genuine sensitization from cross-sensitization. This review contains a detailed description of allergenic components of cat, dog, horse, and small mammalian pets. Sensitizations to exotic pets, a newly emerging issue, are also discussed.
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26
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Zahradnik E, Raulf M. Respiratory Allergens from Furred Mammals: Environmental and Occupational Exposure. Vet Sci 2017; 4:vetsci4030038. [PMID: 29056697 PMCID: PMC5644656 DOI: 10.3390/vetsci4030038] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2017] [Revised: 07/31/2017] [Accepted: 08/01/2017] [Indexed: 12/21/2022] Open
Abstract
Furry mammals kept as pets, farm and laboratory animals are important allergen sources. The prevalence of sensitization to furred mammals appears to be increasing worldwide. Several mammalian allergens from diverse species are well characterized with regard to their molecular structure and immunogenicity, and some are already available for component-resolved allergy diagnostics. The distribution of various mammalian allergens has been extensively studied during the past few decades. Animal allergens were found to be ubiquitous in the human environment, even in places where no animals reside, with concentrations differing considerably between locations and geographical regions. This review presents an overview of identified mammalian respiratory allergens classified according to protein families, and compiles the results of allergen exposure assessment studies conducted in different public and occupational environments.
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Affiliation(s)
- Eva Zahradnik
- Center of Allergology/Immunology, Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany.
| | - Monika Raulf
- Center of Allergology/Immunology, Institute for Prevention and Occupational Medicine of the German Social Accident Insurance, Institute of the Ruhr-Universität Bochum (IPA), Bürkle-de-la-Camp-Platz 1, 44789 Bochum, Germany.
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27
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Abstract
Furry mammals kept as pets, farm and laboratory animals are important allergen sources. The prevalence of sensitization to furred mammals appears to be increasing worldwide. Several mammalian allergens from diverse species are well characterized with regard to their molecular structure and immunogenicity, and some are already available for component-resolved allergy diagnostics. The distribution of various mammalian allergens has been extensively studied during the past few decades. Animal allergens were found to be ubiquitous in the human environment, even in places where no animals reside, with concentrations differing considerably between locations and geographical regions. This review presents an overview of identified mammalian respiratory allergens classified according to protein families, and compiles the results of allergen exposure assessment studies conducted in different public and occupational environments.
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28
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Dolgova AS, Stukolova OA. High-fidelity PCR enzyme with DNA-binding domain facilitates de novo gene synthesis. 3 Biotech 2017; 7:128. [PMID: 28573398 PMCID: PMC5453909 DOI: 10.1007/s13205-017-0745-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2016] [Accepted: 01/30/2017] [Indexed: 11/30/2022] Open
Abstract
Nowadays enzymatic synthesis of genes is the most powerful tool for fast resolution of the various tasks in the field of basic and applied biological research. PCR-based gene assembly from overlapping oligonucleotides has become a widely used strategy. However, all the methods described in the literature are not perfect and need an extra processing step. In this study we are verifying Phusion high-fidelity polymerase as a tool to reduce nucleotide mismatches in de novo gene synthesis, thus facilitating subsequent cloning. To test the efficiency of the polymerase, we selected Fel d 4 gene, which is a 581 bp DNA sequence encoding the lipocalin allergen protein, one of the major cat allergens. The approach described here, therefore, would be useful in DNA sequences creation.
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Affiliation(s)
- A S Dolgova
- Federal Budget Institution of Science "Central Research Institute of Epidemiology" of The Federal Service on Customers' Rights Protection and Human Well-being Surveillance, 3A, Novogireyevskaya st, Moscow, 111123, Russia.
| | - O A Stukolova
- Federal Budget Institution of Science "Central Research Institute of Epidemiology" of The Federal Service on Customers' Rights Protection and Human Well-being Surveillance, 3A, Novogireyevskaya st, Moscow, 111123, Russia
- Federal Budget Institution of Science "Research Institute of Occupational Health", Prospect Budennogo 31, Moscow, 105275, Russia
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29
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Abstract
PURPOSE OF REVIEW The purpose of this review is to evaluate the most recent findings on indoor allergens and their impact on allergic diseases. RECENT FINDINGS Indoor allergens are present inside buildings (home, work environment, school), and given the chronic nature of the exposures, indoor allergies tend to be associated with the development of asthma. The most common indoor allergens are derived from dust mites, cockroaches, mammals (including wild rodents and pets), and fungi. The advent of molecular biology and proteomics has led to the identification, cloning, and expression of new indoor allergens, which have facilitated research to elucidate their role in allergic diseases. This review is an update on new allergens and their molecular features, together with the most recent reports on their avoidance for allergy prevention and their use for diagnosis and treatment. Research progress on indoor allergens will result in the development of new diagnostic tools and design of coherent strategies for immunotherapy.
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Affiliation(s)
- Anna Pomés
- Indoor Biotechnologies, Inc., 700 Harris Street, Charlottesville, VA, 22903, USA.
| | - Martin D Chapman
- Indoor Biotechnologies, Inc., 700 Harris Street, Charlottesville, VA, 22903, USA
| | - Sabina Wünschmann
- Indoor Biotechnologies, Inc., 700 Harris Street, Charlottesville, VA, 22903, USA
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30
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Eder K, Becker S, San Nicoló M, Berghaus A, Gröger M. Usefulness of component resolved analysis of cat allergy in routine clinical practice. ALLERGY, ASTHMA, AND CLINICAL IMMUNOLOGY : OFFICIAL JOURNAL OF THE CANADIAN SOCIETY OF ALLERGY AND CLINICAL IMMUNOLOGY 2016. [PMID: 27891156 DOI: 10.1186/s13223-016-0163-8.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND Cat allergy is of great importance, and its prevalence is increasing worldwide. Cat allergens and house dust mite allergens represent the major indoor allergens; however, they are ubiquitous. Cat sensitization and allergy are known risk factors for rhinitis, bronchial hyperreactivity and asthma. Thus, the diagnosis of sensitization to cats is important for any allergist. METHODS 70 patients with positive skin prick tests for cats were retrospectively compared regarding their skin prick test results, as well as their specific immunoglobulin E antibody profiles with regard to their responses to the native cat extract, rFel d 1, nFel d 2 and rFel d 4. 35 patients were allergic to cats, as determined by positive anamnesis and/or nasal provocation with cat allergens, and 35 patients exhibited clinically non-relevant sensitization, as indicated by negative anamnesis and/or a negative nasal allergen challenge. RESULTS Native cat extract serology testing detected 100% of patients who were allergic to cats but missed eight patients who showed sensitization in the skin prick test and did not have allergic symptoms. The median values of the skin prick test, as well as those of the specific immunoglobulin E antibodies against the native cat extract, were significantly higher for allergic patients than for patients with clinically non-relevant sensitization. Component based diagnostic testing to rFel d 1 was not as reliable. Sensitization to nFel d 2 and rFel d 4 was seen only in individual patients. CONCLUSION Extract based diagnostic methods for identifying cat allergy and sensitization, such as the skin prick test and native cat extract serology, remain crucial in routine clinical practice. In our study, component based diagnostic testing could not replace these methods with regard to the detection of sensitization to cats and differentiation between allergy and sensitization without clinical relevance. However, component resolved allergy diagnostic tools have individual implications, and future studies may facilitate a better understanding of its use and subsequently may improve the clinical management of allergic patients.
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Affiliation(s)
- Katharina Eder
- Department of Oto-Rhino-Laryngology, Head & Neck Surgery, Ludwig-Maximilians-University, Marchioninistr. 15, 81377 Munich, Germany
| | - Sven Becker
- Department of Oto-Rhino-Laryngology, Head & Neck Surgery, Johannes-Gutenberg-University, Mainz, Germany
| | - Marion San Nicoló
- Department of Oto-Rhino-Laryngology, Head & Neck Surgery, Ludwig-Maximilians-University, Marchioninistr. 15, 81377 Munich, Germany
| | - Alexander Berghaus
- Department of Oto-Rhino-Laryngology, Head & Neck Surgery, Ludwig-Maximilians-University, Marchioninistr. 15, 81377 Munich, Germany
| | - Moritz Gröger
- Department of Oto-Rhino-Laryngology, Head & Neck Surgery, Ludwig-Maximilians-University, Marchioninistr. 15, 81377 Munich, Germany
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31
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Eder K, Becker S, San Nicoló M, Berghaus A, Gröger M. Usefulness of component resolved analysis of cat allergy in routine clinical practice. Allergy Asthma Clin Immunol 2016; 12:58. [PMID: 27891156 PMCID: PMC5111222 DOI: 10.1186/s13223-016-0163-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2016] [Accepted: 10/17/2016] [Indexed: 01/18/2023] Open
Abstract
Background Cat allergy is of great importance, and its prevalence is increasing worldwide. Cat allergens and house dust mite allergens represent the major indoor allergens; however, they are ubiquitous. Cat sensitization and allergy are known risk factors for rhinitis, bronchial hyperreactivity and asthma. Thus, the diagnosis of sensitization to cats is important for any allergist. Methods 70 patients with positive skin prick tests for cats were retrospectively compared regarding their skin prick test results, as well as their specific immunoglobulin E antibody profiles with regard to their responses to the native cat extract, rFel d 1, nFel d 2 and rFel d 4. 35 patients were allergic to cats, as determined by positive anamnesis and/or nasal provocation with cat allergens, and 35 patients exhibited clinically non-relevant sensitization, as indicated by negative anamnesis and/or a negative nasal allergen challenge. Results Native cat extract serology testing detected 100% of patients who were allergic to cats but missed eight patients who showed sensitization in the skin prick test and did not have allergic symptoms. The median values of the skin prick test, as well as those of the specific immunoglobulin E antibodies against the native cat extract, were significantly higher for allergic patients than for patients with clinically non-relevant sensitization. Component based diagnostic testing to rFel d 1 was not as reliable. Sensitization to nFel d 2 and rFel d 4 was seen only in individual patients. Conclusion Extract based diagnostic methods for identifying cat allergy and sensitization, such as the skin prick test and native cat extract serology, remain crucial in routine clinical practice. In our study, component based diagnostic testing could not replace these methods with regard to the detection of sensitization to cats and differentiation between allergy and sensitization without clinical relevance. However, component resolved allergy diagnostic tools have individual implications, and future studies may facilitate a better understanding of its use and subsequently may improve the clinical management of allergic patients.
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Affiliation(s)
- Katharina Eder
- Department of Oto-Rhino-Laryngology, Head & Neck Surgery, Ludwig-Maximilians-University, Marchioninistr. 15, 81377 Munich, Germany
| | - Sven Becker
- Department of Oto-Rhino-Laryngology, Head & Neck Surgery, Johannes-Gutenberg-University, Mainz, Germany
| | - Marion San Nicoló
- Department of Oto-Rhino-Laryngology, Head & Neck Surgery, Ludwig-Maximilians-University, Marchioninistr. 15, 81377 Munich, Germany
| | - Alexander Berghaus
- Department of Oto-Rhino-Laryngology, Head & Neck Surgery, Ludwig-Maximilians-University, Marchioninistr. 15, 81377 Munich, Germany
| | - Moritz Gröger
- Department of Oto-Rhino-Laryngology, Head & Neck Surgery, Ludwig-Maximilians-University, Marchioninistr. 15, 81377 Munich, Germany
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32
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Perzanowski MS, Ronmark E, James HR, Hedman L, Schuyler AJ, Bjerg A, Lundback B, Platts-Mills TAE. Relevance of specific IgE antibody titer to the prevalence, severity, and persistence of asthma among 19-year-olds in northern Sweden. J Allergy Clin Immunol 2016; 138:1582-1590. [PMID: 27430609 DOI: 10.1016/j.jaci.2016.05.017] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2015] [Revised: 04/27/2016] [Accepted: 05/11/2016] [Indexed: 01/24/2023]
Abstract
BACKGROUND Although sensitization to indoor allergens is strongly associated with asthma, there are questions as to how this relates to asthma symptoms. OBJECTIVE We sought to study the relevance of IgE antibodies to cat and dog allergens in an area in which (1) the climate discourages cockroach, fungal, and mite growth and (2) dander allergens are known to be present in schools and houses without animals. METHODS IgE to 8 allergens was tested in 963 sera from a population-based study on 19-year-olds, and associations with asthma symptoms, diagnosis, and treatment were examined. In positive sera IgE to specific cat and dog allergens was also assayed. RESULTS IgE specific for animal dander had the highest prevalence and strongest relationship to asthma diagnosis. Furthermore, asthma severity, as judged by the frequency of symptoms and use of treatment, was directly associated with the titer of IgE antibodies to animal dander. Among the 103 subjects who had current asthma at age 19 years, 50 had asthma before age 12 years. Among those 50, the odds ratios for asthma related to any IgE antibodies to animal dander or high-titer IgE antibodies (≥17.5 IU/mL) were 9.2 (95% CI, 4.9-17) and 13 (95% CI, 6.9-25), respectively. In multivariable analysis IgE antibodies to Fel d 1 and Can f 5 were each associated with current asthma. CONCLUSION High-titer IgE antibodies to cat and dog allergens were strongly associated with the diagnosis, severity, and persistence of asthma; however, a large proportion of patients with current asthma did not live in a house with a cat or dog.
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Affiliation(s)
| | - Eva Ronmark
- Department of Public Health and Clinical Medicine, OLIN Unit, Umea University, Umea, Sweden
| | - Hayley R James
- Division of Allergy and Immunology, University of Virginia, Charlottesville, Va
| | - Linnea Hedman
- Department of Public Health and Clinical Medicine, OLIN Unit, Umea University, Umea, Sweden
| | | | - Anders Bjerg
- Department of Medicine/Krefting Research Center, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Bo Lundback
- Department of Medicine/Krefting Research Center, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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Pomés A, Chapman MD, Wünschmann S. Indoor Allergens and Allergic Respiratory Disease. Curr Allergy Asthma Rep 2016. [PMID: 27184001 DOI: 10.1007/s11882-016-0622-9.] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
PURPOSE OF REVIEW The purpose of this review is to evaluate the most recent findings on indoor allergens and their impact on allergic diseases. RECENT FINDINGS Indoor allergens are present inside buildings (home, work environment, school), and given the chronic nature of the exposures, indoor allergies tend to be associated with the development of asthma. The most common indoor allergens are derived from dust mites, cockroaches, mammals (including wild rodents and pets), and fungi. The advent of molecular biology and proteomics has led to the identification, cloning, and expression of new indoor allergens, which have facilitated research to elucidate their role in allergic diseases. This review is an update on new allergens and their molecular features, together with the most recent reports on their avoidance for allergy prevention and their use for diagnosis and treatment. Research progress on indoor allergens will result in the development of new diagnostic tools and design of coherent strategies for immunotherapy.
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Affiliation(s)
- Anna Pomés
- Indoor Biotechnologies, Inc., 700 Harris Street, Charlottesville, VA, 22903, USA.
| | - Martin D Chapman
- Indoor Biotechnologies, Inc., 700 Harris Street, Charlottesville, VA, 22903, USA
| | - Sabina Wünschmann
- Indoor Biotechnologies, Inc., 700 Harris Street, Charlottesville, VA, 22903, USA
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34
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Breiteneder H. Grundlagen natürlicher Allergene. ALLERGOLOGIE 2016. [DOI: 10.1007/978-3-642-37203-2_17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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35
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Asarnoj A, Hamsten C, Wadén K, Lupinek C, Andersson N, Kull I, Curin M, Anto J, Bousquet J, Valenta R, Wickman M, van Hage M. Sensitization to cat and dog allergen molecules in childhood and prediction of symptoms of cat and dog allergy in adolescence: A BAMSE/MeDALL study. J Allergy Clin Immunol 2015; 137:813-21.e7. [PMID: 26686472 DOI: 10.1016/j.jaci.2015.09.052] [Citation(s) in RCA: 108] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2015] [Revised: 08/31/2015] [Accepted: 09/15/2015] [Indexed: 12/17/2022]
Abstract
BACKGROUND Sensitization to individual cat and dog allergen molecules can contribute differently to development of allergy to these animals. OBJECTIVE We sought to investigate the association between sensitization patterns to cat and dog allergen molecules during childhood and symptoms to these furry animals up to age 16 years. METHODS Data from 779 randomly collected children from the Barn/Children Allergy/Asthma Milieu Stockholm Epidemiologic birth cohort at 4, 8, and 16 years were used. IgE levels to cat and dog were determined by using ImmunoCAP, and levels to allergen molecules were determined by using an allergen chip based on ISAC technology (Mechanisms for the Development of Allergy chip). Allergy was defined as reported rhinitis, conjunctivitis, or asthma at exposure to cat or dog. RESULTS Cross-sectionally, IgE to Fel d 1 and cat extract had similar positive predictive values for cat allergy. IgE to Can f 1 showed a higher positive predictive value for dog allergy than dog extract IgE. Sensitizations to Fel d 1 and Can f 1 in childhood were significantly associated with symptoms to cat or dog at age 16 years. Polysensitization to 3 or more allergen molecules from cat or dog was a better longitudinal predictor of cat or dog symptoms than results of IgE tests with cat or dog allergen extract, respectively. Cross-sectionally, cat/dog-polysensitized children had higher IgE levels and more frequent symptoms to cat and dog than monosensitized children. CONCLUSIONS Sensitization to Fel d 1 and Can f 1 in childhood and polysensitization to either cat or dog allergen molecules predict cat and dog allergy cross-sectionally and longitudinally significantly better than IgE to cat or dog extract.
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Affiliation(s)
- Anna Asarnoj
- Clinical Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet and University Hospital, Stockholm, Sweden; Astrid Lindgren Children's Hospital, Stockholm, Sweden.
| | - Carl Hamsten
- Clinical Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet and University Hospital, Stockholm, Sweden; Center for Inflammatory Diseases, Karolinska Institutet, Stockholm, Sweden
| | - Konrad Wadén
- Clinical Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet and University Hospital, Stockholm, Sweden
| | - Christian Lupinek
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Niklas Andersson
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Inger Kull
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden; Sachs' Children's Hospital, Södersjukhuset, Stockholm, Sweden; Department of Clinical Science and Education, Stockholm South General Hospital, Karolinska Institutet, Stockholm, Sweden
| | - Mirela Curin
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Josep Anto
- Centre for Research in Environmental Epidemiology (CREAL), Barcelona, Spain; IMIM (Hospital del Mar Research Institute), Barcelona, Spain; Departament de Ciències Experimentals i de la Salut, Universitat Pompeu Fabra, Barcelona, Spain; CIBER Epidemiología y Salud Pública, Barcelona, Spain
| | - Jean Bousquet
- University Hospital of Montpellier, Hôpital Arnaud de Villeneuve, Montpellier, Villejuif, France
| | - Rudolf Valenta
- Division of Immunopathology, Department of Pathophysiology and Allergy Research, Center for Pathophysiology, Infectiology and Immunology, Medical University of Vienna, Vienna, Austria
| | - Magnus Wickman
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden; Sachs' Children's Hospital, Södersjukhuset, Stockholm, Sweden; Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden
| | - Marianne van Hage
- Clinical Immunology and Allergy Unit, Department of Medicine Solna, Karolinska Institutet and University Hospital, Stockholm, Sweden
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Renand A, Archila LD, McGinty J, Wambre E, Robinson D, Hales BJ, Thomas WR, Kwok WW. Chronic cat allergen exposure induces a TH2 cell-dependent IgG4 response related to low sensitization. J Allergy Clin Immunol 2015; 136:1627-1635.e13. [PMID: 26371841 DOI: 10.1016/j.jaci.2015.07.031] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Revised: 06/15/2015] [Accepted: 07/17/2015] [Indexed: 01/13/2023]
Abstract
BACKGROUND In human subjects, allergen tolerance has been observed after high-dose allergen exposure or after completed allergen immunotherapy, which is related to the accumulation of anti-inflammatory IgG4. However, the specific T-cell response that leads to IgG4 induction during chronic allergen exposure remains poorly understood. OBJECTIVE We sought to evaluate the relationship between cat allergen-specific T-cell frequency, cat allergen-specific IgE and IgG4 titers, and clinical status in adults with cat allergy with and without cat ownership and the cellular mechanism by which IgG4 is produced. METHODS Fel d 1-, Fel d 4-, Fel d 7-, and Fel d 8-specific T-cell responses were characterized by CD154 expression after antigen stimulation. RESULTS In allergic subjects without cat ownership, the frequency of cat allergen (Fel d 1 and Fel d 4)-specific TH2 (sTH2) cells correlates with higher IgE levels and is linked to asthma. Paradoxically, we observed that subjects with cat allergy and chronic cat exposure maintain a high frequency of sTH2 cells, which correlates with higher IgG4 levels and low sensitization. B cells from allergic, but not nonallergic subjects, are able to produce IgG4 after cognate interactions with sTH2 clones and Fel d 1 peptide or the Fel d 1 recombinant protein. CONCLUSION These experiments suggest that (1) allergen-experienced B cells with the capacity to produce IgG4 are present in allergic subjects and (2) cat allergen exposure induces an IgG4 response in a TH2 cell-dependent manner. Thus IgG4 accumulation could be mediated by chronic activation of the TH2 response, which in turn drives desensitization.
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Affiliation(s)
- Amedee Renand
- Benaroya Research Institute at Virginia Mason, Seattle, Wash
| | - Luis D Archila
- Benaroya Research Institute at Virginia Mason, Seattle, Wash
| | - John McGinty
- Benaroya Research Institute at Virginia Mason, Seattle, Wash
| | - Erik Wambre
- Benaroya Research Institute at Virginia Mason, Seattle, Wash
| | - David Robinson
- the Asthma and Allergy Department, Virginia Mason Medical Center, Seattle, Wash
| | - Belinda J Hales
- Telethon Kids Institute, University of Western Australia, Subiaco, Australia
| | - Wayne R Thomas
- Telethon Kids Institute, University of Western Australia, Subiaco, Australia
| | - William W Kwok
- Benaroya Research Institute at Virginia Mason, Seattle, Wash; Department of Medicine, University of Washington, Seattle, Wash.
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Carvalho VMA, Nakahara TS, Cardozo LM, Souza MAA, Camargo AP, Trintinalia GZ, Ferraz E, Papes F. Lack of spatial segregation in the representation of pheromones and kairomones in the mouse medial amygdala. Front Neurosci 2015; 9:283. [PMID: 26321906 PMCID: PMC4531233 DOI: 10.3389/fnins.2015.00283] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Accepted: 07/28/2015] [Indexed: 11/13/2022] Open
Abstract
The nervous system is organized to detect, internally represent and process sensory information to generate appropriate behaviors. Despite the crucial importance of odors that elicit instinctive behaviors, such as pheromones and kairomones, their neural representation remains little characterized in the mammalian brain. Here we used expression of the immediate early gene product c-Fos as a marker of neuronal activity to find that a wide range of pheromones and kairomones produces activation in the medial nucleus of the amygdala, a brain area anatomically connected with the olfactory sensory organs. We see that activity in this nucleus depends on vomeronasal organ input, and that distinct vomeronasal stimuli activate a dispersed ensemble of cells, without any apparent spatial segregation. This activity pattern does not reflect the chemical category of the stimuli, their valence or the induced behaviors. These findings will help build a complete understanding of how odor information is processed in the brain to generate instinctive behaviors.
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Affiliation(s)
- Vinicius M A Carvalho
- Department of Genetics and Evolution, Institute of Biology, University of Campinas Campinas, Brazil ; Graduate Program in Genetics and Molecular Biology, Institute of Biology, University of Campinas Campinas, Brazil
| | - Thiago S Nakahara
- Department of Genetics and Evolution, Institute of Biology, University of Campinas Campinas, Brazil ; Graduate Program in Genetics and Molecular Biology, Institute of Biology, University of Campinas Campinas, Brazil
| | - Leonardo M Cardozo
- Department of Genetics and Evolution, Institute of Biology, University of Campinas Campinas, Brazil ; Graduate Program in Genetics and Molecular Biology, Institute of Biology, University of Campinas Campinas, Brazil
| | - Mateus A A Souza
- Department of Genetics and Evolution, Institute of Biology, University of Campinas Campinas, Brazil ; Graduate Program in Genetics and Molecular Biology, Institute of Biology, University of Campinas Campinas, Brazil
| | - Antonio P Camargo
- Department of Genetics and Evolution, Institute of Biology, University of Campinas Campinas, Brazil ; Undergraduate Program in the Biological Sciences, Institute of Biology, University of Campinas Campinas, Brazil
| | - Guilherme Z Trintinalia
- Department of Genetics and Evolution, Institute of Biology, University of Campinas Campinas, Brazil ; Graduate Program in Genetics and Molecular Biology, Institute of Biology, University of Campinas Campinas, Brazil
| | | | - Fabio Papes
- Department of Genetics and Evolution, Institute of Biology, University of Campinas Campinas, Brazil
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Sastre-Ibañez M, Sastre J. Molecular allergy diagnosis for the clinical characterization of asthma. Expert Rev Mol Diagn 2015; 15:789-99. [DOI: 10.1586/14737159.2015.1036745] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
Affiliation(s)
- Marina Sastre-Ibañez
- 1Allergy Department, Fundación Jiménez Díaz and CIBER de Enfermedades Respiratorias (CIBERES, Institute Carlos III, Ministry of Economy and Competitiveness) Madrid, Universidad Autónoma de Madrid, Madrid, Spain
- 2Hospital Clínico San Carlos, Madrid, Spain
| | - Joaquín Sastre
- 1Allergy Department, Fundación Jiménez Díaz and CIBER de Enfermedades Respiratorias (CIBERES, Institute Carlos III, Ministry of Economy and Competitiveness) Madrid, Universidad Autónoma de Madrid, Madrid, Spain
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39
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de Sousa-Pereira P, Cova M, Abrantes J, Ferreira R, Trindade F, Barros A, Gomes P, Colaço B, Amado F, Esteves PJ, Vitorino R. Cross-species comparison of mammalian saliva using an LC-MALDI based proteomic approach. Proteomics 2015; 15:1598-607. [PMID: 25641928 DOI: 10.1002/pmic.201400083] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2014] [Revised: 12/01/2014] [Accepted: 01/13/2015] [Indexed: 01/31/2023]
Abstract
Despite the importance of saliva in the regulation of oral cavity homeostasis, few studies have been conducted to quantitatively compare the saliva of different mammal species. Aiming to define a proteome signature of mammals' saliva, an in-depth SDS-PAGE-LC coupled to MS/MS (GeLC-MS/MS) approach was used to characterize the saliva from primates (human), carnivores (dog), glires (rat and rabbit), and ungulates (sheep, cattle, horse). Despite the high variability in the number of distinct proteins identified per species, most protein families were shared by the mammals studied with the exception of cattle and horse. Alpha-amylase is an example that seems to reflect the natural selection related to digestion efficacy and food recognition. Casein protein family was identified in all species but human, suggesting an alternative to statherin in the protection of hard tissues. Overall, data suggest that different proteins might assure a similar role in the regulation of oral cavity homeostasis, potentially explaining the specific mammals' salivary proteome signature. Moreover, some protein families were identified for the first time in the saliva of some species, the presence of proline-rich proteins in rabbit's saliva being a good example.
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Affiliation(s)
- Patrícia de Sousa-Pereira
- QOPNA, Mass Spectrometry Center, Department of Chemistry, University of Aveiro, Aveiro, Portugal; CIBIO-InBIO, Centro de Investigação em Biodiversidade e Recursos Genéticos, Campus Agrário de Vairão, Vairão, Portugal
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Rytkönen-Nissinen M, Saarelainen S, Randell J, Häyrinen J, Kalkkinen N, Virtanen T. IgE Reactivity of the Dog Lipocalin Allergen Can f 4 and the Development of a Sandwich ELISA for Its Quantification. ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2015; 7:384-92. [PMID: 25749774 PMCID: PMC4446637 DOI: 10.4168/aair.2015.7.4.384] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/13/2014] [Revised: 10/10/2014] [Accepted: 12/01/2014] [Indexed: 11/24/2022]
Abstract
Purpose Divergent results on the IgE reactivity of dog-allergic subjects to Can f 4 have been reported. The aim of this study was to evaluate the significance of Can f 4 in dog allergy and to develop an immunochemical method for measuring Can f 4 content in environmental samples. Methods We purified the natural dog allergen Can f 4 from a dog dander extract by monoclonal antibody-based affinity chromatography and generated its variant in a recombinant form. Sixty-three dog-allergic patients and 12 nonallergic control subjects were recruited in the study. The IgE-binding capacity of natural Can f 4 and its recombinant variant was assessed by ELISA, immunoblotting, and skin prick tests (SPT). Results Eighty-one percent of the dog-allergic patients showed a positive result to the immunoaffinity-purified natural Can f 4 in IgE ELISA, but only 46% in IgE immunoblotting. Respective results with the recombinant Can f 4 variant were 54% and 49%. SPT results reflected those obtained in ELISA and immunoblotting. The overall IgE reactivity of the immunoaffinity-purified natural Can f 4 was found to depend strongly on the integrity of the allergen's conformation. A sandwich ELISA based on monoclonal antibodies was found to be functional for measuring Can f 4 in environmental samples. Conclusions Can f 4 is a major allergen of dog together with Can f 1 and Can f 5. In combination with other dog allergens, it improves the reliability of allergy tests in dog allergy.
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Affiliation(s)
- Marja Rytkönen-Nissinen
- Department of Clinical Microbiology, Institute of Clinical Medicine and Biocenter Kuopio, University of Eastern Finland, Kuopio Campus, Finland.; Institute of Dentistry, School of Medicine, University of Eastern Finland, Kuopio Campus, Finland.
| | - Soili Saarelainen
- Department of Clinical Microbiology, Institute of Clinical Medicine and Biocenter Kuopio, University of Eastern Finland, Kuopio Campus, Finland
| | - Jukka Randell
- Department of Pulmonary Diseases, Kuopio University Hospital, Kuopio, Finland
| | - Jukka Häyrinen
- Institute of Biomedicine, University of Eastern Finland, Kuopio Campus, Finland
| | - Nisse Kalkkinen
- Institute of Biotechnology, Viikki Biocenter, University of Helsinki, Finland
| | - Tuomas Virtanen
- Department of Clinical Microbiology, Institute of Clinical Medicine and Biocenter Kuopio, University of Eastern Finland, Kuopio Campus, Finland
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Nilsson OB, Neimert-Andersson T, Bronge M, Grundström J, Sarma R, Uchtenhagen H, Kikhney A, Sandalova T, Holmgren E, Svergun D, Achour A, van Hage M, Grönlund H. Designing a multimer allergen for diagnosis and immunotherapy of dog allergic patients. PLoS One 2014; 9:e111041. [PMID: 25353166 PMCID: PMC4212987 DOI: 10.1371/journal.pone.0111041] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Accepted: 09/19/2014] [Indexed: 12/04/2022] Open
Abstract
Background Dog dander extract used for diagnosis and allergen-specific immunotherapy is often of variable and of poor quality. Objective To assemble four well-established dog allergen components into one recombinant folded protein for improved diagnosis and vaccination of allergy to dog. Methods A linked molecule, comprising the four dog lipocalin allergens Can f 1, Can f 2, Can f 4 and Can f 6 was constructed. The tetrameric protein was structurally characterized by small angle X-ray scattering, and compared with each single recombinant lipocalin allergen or an equimolar mix of the four allergens by analytical size exclusion chromatography, circular dichroism, allergen-specific IgE in serum by ELISA and allergen-dependent capacity to activate basophils. The immunogenicity of the fusion protein was evaluated in immunized mice by assessing splenocyte proliferation and antibody production. Results The linked tetrameric construct was produced as a soluble fusion protein, with the specific folds of the four individual allergens conserved. This multi-allergen molecule was significantly more efficient (p<0.001) than each single recombinant allergen in binding to dog-specific IgE, and the epitope spectrum was unaffected compared to an equimolar mix of the four allergens. Basophil degranulation revealed that the biologic activity of the linked molecule was retained. Immunization of mice with the linked construct induced comparable allergen-specific IgG responses with blocking capacity towards all included allergens and generated comparably low T-cell responses. Conclusion We provide the first evidence for a linked recombinant molecule covering the major dog allergens for potential use in diagnostics and allergy vaccination of dog allergic patients.
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Affiliation(s)
- Ola B. Nilsson
- Department of Medicine, Clinical Immunology and Allergy Unit, Karolinska Institutet, Stockholm, Sweden
- Center for Biomembrane Research, Department of Biochemistry and Biophysics, Stockholm University, Stockholm, Sweden
| | - Theresa Neimert-Andersson
- Department of Clinical Neuroscience, Therapeutic Immune Design Unit, Center for molecular Medicine (CMM), Karolinska Institutet, Stockholm, Sweden
| | - Mattias Bronge
- Department of Clinical Neuroscience, Therapeutic Immune Design Unit, Center for molecular Medicine (CMM), Karolinska Institutet, Stockholm, Sweden
| | - Jeanette Grundström
- Department of Medicine, Clinical Immunology and Allergy Unit, Karolinska Institutet, Stockholm, Sweden
| | - Ranjana Sarma
- Science for Life Laboratory, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
| | - Hannes Uchtenhagen
- Science for Life Laboratory, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
| | - Alexey Kikhney
- European Molecular Biology Laboratory (EMBL) - Hamburg Outstation, c/o DESY, Hamburg, Germany
| | - Tatyana Sandalova
- Science for Life Laboratory, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
| | - Erik Holmgren
- Department of Medicine, Clinical Immunology and Allergy Unit, Karolinska Institutet, Stockholm, Sweden
- Department of Clinical Neuroscience, Therapeutic Immune Design Unit, Center for molecular Medicine (CMM), Karolinska Institutet, Stockholm, Sweden
| | - Dmitri Svergun
- European Molecular Biology Laboratory (EMBL) - Hamburg Outstation, c/o DESY, Hamburg, Germany
| | - Adnane Achour
- Science for Life Laboratory, Department of Medicine Solna, Karolinska Institutet, Stockholm, Sweden
| | - Marianne van Hage
- Department of Medicine, Clinical Immunology and Allergy Unit, Karolinska Institutet, Stockholm, Sweden
| | - Hans Grönlund
- Department of Clinical Neuroscience, Therapeutic Immune Design Unit, Center for molecular Medicine (CMM), Karolinska Institutet, Stockholm, Sweden
- * E-mail:
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Konradsen JR, Fujisawa T, van Hage M, Hedlin G, Hilger C, Kleine-Tebbe J, Matsui EC, Roberts G, Rönmark E, Platts-Mills TAE. Allergy to furry animals: New insights, diagnostic approaches, and challenges. J Allergy Clin Immunol 2014; 135:616-25. [PMID: 25282018 DOI: 10.1016/j.jaci.2014.08.026] [Citation(s) in RCA: 122] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Revised: 07/08/2014] [Accepted: 08/05/2014] [Indexed: 12/16/2022]
Abstract
The prevalence of allergy to furry animals has been increasing, and allergy to cats, dogs, or both is considered a major risk factor for the development of asthma and rhinitis. An important step forward in the diagnosis of allergy to furry animals has been made with the introduction of molecular-based allergy diagnostics. A workshop on furry animals was convened to provide an up-to-date assessment of our understanding of (1) the exposure and immune response to the major mammalian allergens, (2) the relationship of these responses (particularly those to specific proteins or components) to symptoms, and (3) the relevance of these specific antibody responses to current or future investigation of patients presenting with allergic diseases. In this review research results discussed at the workshop are presented, including the effect of concomitant exposures from other allergens or microorganisms, the significance of the community prevalence of furry animals, molecular-based allergy diagnostics, and a detailed discussion of cat and dog components.
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Affiliation(s)
- Jon R Konradsen
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden; Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden; Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden.
| | - Takao Fujisawa
- Institute for Clinical Research, Mie National Hospital, Mie, Japan
| | - Marianne van Hage
- Clinical Immunology and Allergy Unit, Department of Medicine, Karolinska Institutet and University Hospital, Stockholm, Sweden
| | - Gunilla Hedlin
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden; Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden; Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden
| | - Christiane Hilger
- Laboratory of Immunogenetics and Allergology, CRP-Santé, Luxembourg, Luxembourg
| | - Jörg Kleine-Tebbe
- Allergy & Asthma Center Westend, Outpatient Clinic and Research Unit, Berlin, Germany
| | - Elizabeth C Matsui
- Division of Pediatric Allergy/Immunology, Johns Hopkins School of Medicine, Baltimore, Md
| | - Graham Roberts
- David Hide Asthma and Allergy Research Centre, St Mary's Hospital, Isle of Wight, United Kingdom; Human Development and Health and Clinical and Experimental Sciences Academic Units, University of Southampton Faculty of Medicine, Southampton, United Kingdom; NIHR Respiratory Biomedical Research Unit, University Hospital Southampton NHS Foundation Trust, Southampton, United Kingdom
| | - Eva Rönmark
- Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine, Umeå University, Umeå, Sweden
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Airborne biogenic particles in the snow of the cities of the Russian Far East as potential allergic compounds. J Immunol Res 2014; 2014:141378. [PMID: 25140327 PMCID: PMC4129992 DOI: 10.1155/2014/141378] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Accepted: 07/10/2014] [Indexed: 02/02/2023] Open
Abstract
This paper presents an analysis of airborne biogenic particles (1 mkm–1 mm) found in the snow in several cities of the Russian Far East during 2010–2013. The most common was vegetational terraneous detritus (fragments of tree and grass leaves) followed by animal hair, small insects and their fragments, microorganisms of aeroplankton, and equivocal biological garbage. Specific components were found in samples from locations close to bodies of water such as fragments of algae and mollusc shells and, marine invertebrates (needles of sea urchins and shell debris of arthropods). In most locations across the Far East (Vladivostok, Khabarovsk, Blagoveshchensk, and Ussuriysk), the content of biogenic particles collected in the winter did not exceed 10% of the total particulate matter, with the exception of Birobidzhan and the nature reserve Bastak, where it made up to 20%. Most of all biogenic compounds should be allergic: hair, fragments of tree and grass leaves, insects, and microorganisms.
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Hentges F, Léonard C, Arumugam K, Hilger C. Immune responses to inhalant Mammalian allergens. Front Immunol 2014; 5:234. [PMID: 24904583 PMCID: PMC4033121 DOI: 10.3389/fimmu.2014.00234] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Accepted: 05/06/2014] [Indexed: 12/16/2022] Open
Abstract
In Europe and the USA, at least one person in four is exposed every day to inhalant allergens of mammalian origin, a considerable number is regularly exposed for professional reasons and almost everyone is occasionally exposed to inhalant allergens from pets or domestic animals. The production of IgE to these inhalant allergens, often complicated by asthma and rhinitis, defines the atopic status. However, the immune response to these allergens largely imprints the cellular immune compartment and also drives non-IgE humoral immune responses in the allergic and non-allergic population. During the recent years, it has become clear that IgE antibodies recognize mammalian allergens that belong to three protein or glycoprotein families: the secretoglobins, the lipocalins, and the serum albumins. In this article, we review the humoral and cellular immune responses to the major members of these families and try to define common characteristics and also distinctive features.
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Affiliation(s)
- François Hentges
- Laboratory of Immunogenetics and Allergology, CRP-Santé , Luxembourg , Luxembourg
| | - Cathy Léonard
- Laboratory of Immunogenetics and Allergology, CRP-Santé , Luxembourg , Luxembourg
| | - Karthik Arumugam
- Laboratory of Retrovirology, CRP-Santé , Luxembourg , Luxembourg
| | - Christiane Hilger
- Laboratory of Immunogenetics and Allergology, CRP-Santé , Luxembourg , Luxembourg
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45
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Arruda LK, Barbosa MCR, Santos ABR, Moreno AS, Chapman MD, Pomés A. Recombinant allergens for diagnosis of cockroach allergy. Curr Allergy Asthma Rep 2014; 14:428. [PMID: 24563284 DOI: 10.1007/s11882-014-0428-6] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Molecular cloning of cockroach allergens and their expression as recombinant proteins have allowed a better understanding of the mechanisms of cockroach allergic disease. Recombinant cockroach allergens have been used for skin testing or in vitro methods to measure IgE antibody levels in serum. Early studies evaluating selected U.S. patients revealed that a cocktail of four cockroach allergens, Bla g 1, Bla g 2, Bla g 4, and Bla g 5, would identify 95 % of cockroach allergic patients. More recent studies pointed to an important role of sensitization to tropomyosin among certain populations, and suggested that a cocktail of five allergens Bla g 1 and/or Per a 1, Bla g 2, Bla g 4, Bla g 5, and Bla g 7, and/or Per a 7, would be expected to diagnose 50- 64 % of cockroach-allergic patients worldwide. Variation in IgE reactivity profiles could be in part due to IgE responses to cross-reactive homologous allergens from different origins. The availability of purified natural or recombinant cockroach allergens provides the capacity to improve diagnosis of cockroach allergy and to develop novel forms of immunotherapy for cockroach-allergic patients.
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Affiliation(s)
- L Karla Arruda
- Department of Medicine, Ribeirao Preto Medical School, University of Sao Paulo, Av. Bandeirantes 3900, Ribeirao Preto, SP, 14049-900, Brazil,
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Takahashi LK. Olfactory systems and neural circuits that modulate predator odor fear. Front Behav Neurosci 2014; 8:72. [PMID: 24653685 PMCID: PMC3949219 DOI: 10.3389/fnbeh.2014.00072] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Accepted: 02/20/2014] [Indexed: 11/13/2022] Open
Abstract
When prey animals detect the odor of a predator a constellation of fear-related autonomic, endocrine, and behavioral responses rapidly occur to facilitate survival. How olfactory sensory systems process predator odor and channel that information to specific brain circuits is a fundamental issue that is not clearly understood. However, research in the last 15 years has begun to identify some of the essential features of the sensory detection systems and brain structures that underlie predator odor fear. For instance, the main (MOS) and accessory olfactory systems (AOS) detect predator odors and different types of predator odors are sensed by specific receptors located in either the MOS or AOS. However, complex predator chemosignals may be processed by both the MOS and AOS, which complicate our understanding of the specific neural circuits connected directly and indirectly from the MOS and AOS to activate the physiological and behavioral components of unconditioned and conditioned fear. Studies indicate that brain structures including the dorsal periaqueductal gray (DPAG), paraventricular nucleus (PVN) of the hypothalamus, and the medial amygdala (MeA) appear to be broadly involved in predator odor induced autonomic activity and hypothalamic-pituitary-adrenal (HPA) stress hormone secretion. The MeA also plays a key role in predator odor unconditioned fear behavior and retrieval of contextual fear memory associated with prior predator odor experiences. Other neural structures including the bed nucleus of the stria terminalis and the ventral hippocampus (VHC) appear prominently involved in predator odor fear behavior. The basolateral amygdala (BLA), medial hypothalamic nuclei, and medial prefrontal cortex (mPFC) are also activated by some but not all predator odors. Future research that characterizes how distinct predator odors are uniquely processed in olfactory systems and neural circuits will provide significant insights into the differences of how diverse predator odors activate fear.
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Affiliation(s)
- Lorey K Takahashi
- Department of Psychology, University of Hawaii at Manoa Honolulu, HI, USA
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47
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Patelis A, Janson C, Borres MP, Nordvall L, Alving K, Malinovschi A. Aeroallergen and food IgE sensitization and local and systemic inflammation in asthma. Allergy 2014; 69:380-7. [PMID: 24397423 DOI: 10.1111/all.12345] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/08/2013] [Indexed: 01/09/2023]
Abstract
BACKGROUND We recently reported an independent association between IgE sensitization to food allergens and increased airway inflammation, assessed by fraction of exhaled nitric oxide (FeNO), in a population-based study (J Allergy Clin Immunol, 130, 2012, 397). Similar studies have not been performed in populations with asthma. The aim of the present study was to investigate the allergic sensitization profile in asthmatics and examine FeNO, airway responsiveness and blood eosinophilia in relation to type and degree of IgE sensitization. METHOD FeNO, airway responsiveness, blood eosinophil count (B-Eos) and IgE sensitization to food allergens and aeroallergens were determined in 408 subjects with asthma, aged 10-34 years. RESULTS Asthmatics had higher prevalence of IgE sensitization against all allergens than controls (P < 0.001). Mite, pollen, furry animal, mould and food sensitizations were each associated with increased FeNO, airway responsiveness and B-Eos in asthmatics. IgE sensitization to mould, furry animals and food allergens was independently related to FeNO (all P < 0.05) after adjustment for age, sex, height, smoking history and medication. IgE sensitization to mould (P < 0.001) and furry animals (P = 0.02) was related to airway responsiveness in a similar model. Finally, IgE sensitization to mould (P = 0.001), furry animals (P < 0.001) and food allergens (P < 0.001) was independently related to B-Eos. CONCLUSION Independent effects of IgE sensitization to aeroallergens (furry animals and mould) and food allergens were found on both local and systemic markers of inflammation in asthma. The finding regarding food IgE sensitization is novel, and a clinical implication might be that even food sensitization must be assessed to fully understand inflammation patterns in asthma.
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Affiliation(s)
- A. Patelis
- Department of Medical Sciences, Respiratory Medicine & Allergology; Uppsala University; Uppsala Sweden
| | - C. Janson
- Department of Medical Sciences, Respiratory Medicine & Allergology; Uppsala University; Uppsala Sweden
| | - M. P. Borres
- Immunodiagnostics; Thermo Fischer Scientific; Uppsala Sweden
- Department of Women's and Children's Health; Uppsala University; Uppsala Sweden
| | - L. Nordvall
- Department of Women's and Children's Health; Uppsala University; Uppsala Sweden
| | - K. Alving
- Department of Women's and Children's Health; Uppsala University; Uppsala Sweden
| | - A. Malinovschi
- Department of Medical Sciences, Clinical Physiology; Uppsala University; Uppsala Sweden
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Peptide based immunotherapy: a pivotal tool for allergy treatment. Int Immunopharmacol 2014; 19:391-8. [PMID: 24530919 DOI: 10.1016/j.intimp.2014.01.030] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2013] [Revised: 01/25/2014] [Accepted: 01/29/2014] [Indexed: 11/20/2022]
Abstract
Immunotherapies with T-cell epitope peptides have shown a promising impact over allergic diseases as a potential therapeutic tool in in vitro and in vivo conditions. It is recognized as an effective treatment with long lasting clinical effects and subsequent reduction of the allergic inflammatory reactions. In this review, we have summarized the role of peptide based immunotherapy and emphasis has been given to the recent advancement in pollen, cat, hymenoptera venom, and food allergy.
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Thomas WR. Molecular mimicry as the key to the dominance of the house dust mite allergen Der p 2. Expert Rev Clin Immunol 2014; 5:233-7. [DOI: 10.1586/eci.09.5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Hales BJ, Chai LY, Hazell L, Elliot CE, Stone S, O'Neil SE, Smith WA, Thomas WR. IgE and IgG binding patterns and T-cell recognition of Fel d 1 and non-Fel d 1 cat allergens. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2013; 1:656-65.e1-5. [PMID: 24565714 DOI: 10.1016/j.jaip.2013.08.008] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2013] [Revised: 08/01/2013] [Accepted: 08/13/2013] [Indexed: 12/20/2022]
Abstract
BACKGROUND Cat allergy affects approximately 15% of the population and is a major risk factor for asthma. The relative importance of cat allergens other than Fel d 1 is not known. OBJECTIVE To compare IgE and IgG antibody binding and T-cell recognition of the major cat allergen Fel d 1 with other cat proteins with known IgE binding properties. METHODS IgE, IgG1, and IgG4 antibody to Fel d 1, 2, 3, 4, 7, 8, and the undesignated IgE binding proteins haptoglobin and S100A12 were measured in the plasma of 96 individuals with cat allergy and 78 individuals without cat allergy. Cytokines were measured from T cells stimulated with the cat allergens. RESULTS An allergen other than Fel d 1 had the highest IgE binding specificity for 35% of individuals with cat allergy, and it bound more than 50% of their IgE antibody in 70% of these sera. Fel d 4, 7, and 8 were identified as the main contributors to the non-Fel d 1 IgE binding response and elicited inflammatory Th2 cytokines to a similar degree as Fel d 1. As expected, the average percentage of IgE binding to Fel d 1 for individuals was 55%. IgG4 binding to Fel d 1 was detected in both subjects with allergy (30%) and subjects without allergy (19%). IgG4 binding to the other allergens was less prevalent but was found for both groups. IgG1 antibody was not detected to any of the newly described cat proteins. CONCLUSION Fel d 4, 7, and 8 are allergens that should be included in the diagnosis and investigation of cat allergy.
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Affiliation(s)
- Belinda J Hales
- Telethon Institute for Child Health Research and Centre for Child Health Research, University of Western Australia, Subiaco Wa, Australia.
| | - Lee Ying Chai
- Telethon Institute for Child Health Research and Centre for Child Health Research, University of Western Australia, Subiaco Wa, Australia
| | - Lee Hazell
- Telethon Institute for Child Health Research and Centre for Child Health Research, University of Western Australia, Subiaco Wa, Australia
| | - Claire E Elliot
- Telethon Institute for Child Health Research and Centre for Child Health Research, University of Western Australia, Subiaco Wa, Australia
| | - Shane Stone
- Telethon Institute for Child Health Research and Centre for Child Health Research, University of Western Australia, Subiaco Wa, Australia
| | - Serena E O'Neil
- Telethon Institute for Child Health Research and Centre for Child Health Research, University of Western Australia, Subiaco Wa, Australia
| | - Wendy-Anne Smith
- Telethon Institute for Child Health Research and Centre for Child Health Research, University of Western Australia, Subiaco Wa, Australia
| | - Wayne R Thomas
- Telethon Institute for Child Health Research and Centre for Child Health Research, University of Western Australia, Subiaco Wa, Australia
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