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1.
Allergol Immunopathol (Madr) ; 49(1): 150-152, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33528943

RESUMO

Food allergy immunotherapy is a promising allergen-specific approach to manage food allergy in children, although it is not exempt from adverse events, even severe. The adverse events are not predictable and furthermore cofactors can play a role in triggering them. During the COVID-19 pandemic, patients on food allergy immunotherapy should be provided with suggestions on how to proceed in the event of COVID-19 infection occurring or is suspected. These recommendations would be of support to clinical practitioners dealing with patients on food allergy immunotherapy since there is little data in the literature on the topic.


Assuntos
Hipersensibilidade Alimentar/complicações , Hipersensibilidade Alimentar/terapia , Imunoterapia/efeitos adversos , /complicações , Criança , Protocolos Clínicos , Hipersensibilidade Alimentar/imunologia , Humanos , Corpo Clínico/educação
2.
Curr Allergy Asthma Rep ; 21(2): 8, 2021 02 09.
Artigo em Inglês | MEDLINE | ID: mdl-33560451

RESUMO

PURPOSE OF REVIEW: The coronavirus disease 2019 (COVID-19) has challenged healthcare system capacities and safety for health care workers, reshaping doctor-patient interaction favoring e-Health or telemedicine. The pandemic situation may make difficult to prioritize patients with allergies diseases (AD), face-to-face evaluation, and moreover concern about the possible COVID-19 diagnosis, since COVID-19 shared many symptoms in common with AD. Being COVID-19 a novel disease, everyone is susceptible; there are some advances on vaccine and specific treatment. We evaluate existing literature on allergic diseases (AD): allergic rhinitis, asthma, food allergy, drug allergy, and skin allergy, and potential underlying mechanisms for any interrelationship between AD and COVID-19. RECENT FINDINGS: There is inconclusive and controversial evidence of the association between AD and the risk of adverse clinical outcomes of COVID-19. AD patients should minimize hospital and face-to-face visits, and those who have used biologics and allergen immunotherapy should continue the treatment. It is essential to wear personal protective equipment for the protection of health care workers. Social distancing, rational use of facemasks, eye protection, and hand disinfection for health care workers and patients deserve further attention and promotion. Teleconsultation during COVID-19 times for AD patients is very encouraging and telemedicine platform can provide a reliable service in patient care.


Assuntos
Asma/terapia , Hipersensibilidade Alimentar/terapia , Controle de Infecções/métodos , Rinite Alérgica/terapia , Telemedicina , Asma/imunologia , Produtos Biológicos , Dermatite Alérgica de Contato/imunologia , Dermatite Alérgica de Contato/terapia , Dermatite Atópica/imunologia , Dermatite Atópica/terapia , Dessensibilização Imunológica , Gerenciamento Clínico , Surtos de Doenças , Hipersensibilidade a Drogas/imunologia , Hipersensibilidade a Drogas/terapia , Hipersensibilidade Alimentar/imunologia , Pessoal de Saúde , Humanos , Pandemias/prevenção & controle , Equipamento de Proteção Individual , Rinite Alérgica/imunologia
4.
Ann Allergy Asthma Immunol ; 126(1): 75-82, 2021 01.
Artigo em Inglês | MEDLINE | ID: mdl-32853787

RESUMO

BACKGROUND: Food protein-induced allergic proctocolitis (FPIAP) is a non-immunoglobulin E (IgE)-mediated food allergy, which presents with bloody mucoid stool in infants. Although IgE-mediated allergy and sensitizations to offending foods have been described in other non-IgE-mediated food allergies, it has not been investigated in FPIAP. OBJECTIVE: To investigate IgE-mediated allergy and sensitization to offending foods in FPIAP. METHODS: Patients (n = 204) were retrospectively recruited and grouped as FPIAP (n = 180; FPIAP with or without the symptoms of IgE-mediated food hypersensitivity to offending and nonoffending foods at initial consultation), FPIAP-IgE sensitization to offending foods (n = 17), and FPIAP-transition to IgE-mediated allergy to offending foods (n = 7). The study was performed in accordance with the protocol approved by the local ethical committee of the Hacettepe University. RESULTS: The median age of onset of symptoms and the development of tolerance was 2 months (interquartile range [IQR], 1.0-3.0) and 12 months (IQR, 10.0-14.0), respectively, and of the patients with skin prick test or serum specific IgE tests (n = 196), 38 (19.4%) had evidence of IgE sensitization to offending foods at the initial consultation or during follow-up; 17 (8.6%) had IgE sensitization, 7 (3.6%) indicated a transition to IgE-mediated allergy to FPIAP-induced foods. The median age of tolerance development of the FPIAP-transition group (19 months, IQR, 18.0-29.0) was significantly later than that of the FPIAP group (11 months, IQR, 10.0-14.0; P < .001) and the FPIAP-IgE sensitization group (11.0 months, IQR, 9.5-12.0; P < .001). Tolerance was observed within the study period in almost all the patients. CONCLUSION: Children with FPIAP may have sensitization or develop IgE-mediated allergy over time to offending foods. In addition, IgE sensitization in FPIAP does not have an unfavorable effect on tolerance development; however, the transition to an IgE-mediated phenotype may delay tolerance for a brief time.


Assuntos
Alérgenos/imunologia , Proteínas na Dieta/imunologia , Hipersensibilidade Alimentar/diagnóstico , Hipersensibilidade Alimentar/imunologia , Fenótipo , Proctocolite/diagnóstico , Proctocolite/imunologia , Diagnóstico Diferencial , Humanos , Tolerância Imunológica , Imunoglobulina E/sangue , Imunoglobulina E/imunologia , Masculino , Testes Cutâneos
5.
Ann Allergy Asthma Immunol ; 126(1): 83-88.e1, 2021 01.
Artigo em Inglês | MEDLINE | ID: mdl-32950685

RESUMO

BACKGROUND: Food allergy has a known effect on quality of life (QoL), but this has not been extensively studied during the coronavirus disease 2019 pandemic. OBJECTIVE: To characterize the levels of anxiety of mothers of children aged 0 to 8 years with food allergy compared with families of children without a food allergy and the health-related QoL among children with food allergy during the coronavirus disease 2019 pandemic. METHODS: In a mixed-methods study, Canadian mothers of children aged 0 to 8 years with (cases) and without (controls) food allergy provided demographic data and completed age-appropriate anxiety questionnaires between April 14, 2020, and April 28, 2020. The cases also provided food allergy-related data and completed the Food Allergy Quality of Life Questionnaire. In-depth interviews were subsequently conducted with purposefully selected cases. RESULTS: In a total of 580 participants, 5.5% were cases and 94.5% were controls. For mothers of children aged 0 to 1.5 years, anxiety levels did not differ between cases and controls. For mothers of children aged 1.5 to 8 years, anxiety levels were higher in cases vs controls (P < .05). Among the cases, neither overall nor domain-specific Food Allergy Quality of Life Questionnaire scores differed between age groups (0-3 vs 4-7 years), even after adjustment for confounding variables, including childcare during the pandemic. Qualitatively, the following 3 themes were identified: unexpected challenges of food shopping; less food-related food anxiety during the pandemic; and differences and delays in food allergy testing and therapy. CONCLUSION: Mothers of children with food allergy reported high anxiety and poor health-related QoL. Yet, qualitatively, day-to-day food allergy management was better during the pandemic.


Assuntos
Ansiedade/psicologia , Hipersensibilidade Alimentar/psicologia , Pandemias , Qualidade de Vida/psicologia , Adulto , Ansiedade/diagnóstico , Ansiedade/etiologia , Ansiedade/imunologia , /psicologia , Canadá/epidemiologia , Estudos de Casos e Controles , Criança , Pré-Escolar , Feminino , Hipersensibilidade Alimentar/complicações , Hipersensibilidade Alimentar/diagnóstico , Hipersensibilidade Alimentar/imunologia , Humanos , Lactente , Recém-Nascido , Masculino , Mães/psicologia , Inquéritos e Questionários
7.
J Biosci Bioeng ; 130(4): 374-381, 2020 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-32713812

RESUMO

With increased awareness among consumers regarding food safety and security, food allergen control has become an indispensable requirement in the food industry. Although several methods for detecting allergens in food products are available, highly sensitive techniques are required. In this study, we developed a technique named as peptide array-based inhibition enzyme-linked immunosorbent assay (ELISA), Pep-iEIA, for evaluating antigenicity and detecting cow's milk antigen in infant formula products, using a peptide array consisting of a series of overlapping peptides found in allergenic milk proteins. Pep-iEIA was used to examine five cow's milk-based infant formulas with different degrees of hydrolyzation, and the assay offered both more sensitive detection and detailed analysis of remaining antigenic peptides in allergen compared to conventional ELISA. The antigenicity level of the allergenic peptides identified using Pep-iEIA was confirmed by surface plasmon resonance assay. We believe that Pep-iEIA will be highly useful for antigenicity evaluation of dairy products consumed by infants and patients with cow's milk allergy.


Assuntos
Ensaio de Imunoadsorção Enzimática/métodos , Fórmulas Infantis/efeitos adversos , Análise Serial de Proteínas , Alérgenos/imunologia , Animais , Bovinos , Feminino , Hipersensibilidade Alimentar/imunologia , Humanos , Lactente , Recém-Nascido , Masculino , Proteínas do Leite/imunologia , Peptídeos/imunologia
9.
PLoS One ; 15(7): e0234899, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32645020

RESUMO

The increasing prevalence of individuals with multiple food allergies and the need to distinguish between foods containing homologous, cross-reactive proteins have made the use of single-analyte antibody-based methods (e.g., ELISAs) sometimes insufficient. These issues have resulted in the need to conduct multiple analyses and sometimes employ orthogonal methods like mass spectrometry or DNA-based methods for confirmatory purposes. The xMAP Food Allergen Detection Assay (xMAP FADA) was developed to solve this problem while also providing increased throughput and a modular design suitable for adapting to changes in analytical needs. The use of built-in redundancy provides the xMAP FADA with built-in confirmatory analytical capability by including complementary antibody bead sets and secondary analytical end points (e.g., ratio analysis and multi-antibody profiling). A measure of a method's utility is its performance when employed by analysts of varying expertise in multiple laboratory environments. To gauge this aspect, a multi-laboratory validation (MLV) was conducted with 11 participants of different levels of proficiency. The MLV entailed the analysis of incurred food samples in four problematic food matrices, meat sausage, orange juice, baked muffins, and dark chocolate. Except for a couple of instances, involving two confirmatory components in the analysis of baked muffins, the allergenic foods were detected by all participants at concentrations in the analytical samples comparable to ≤ 10 µg/g in the original food sample. In addition, despite high levels of inter-lab variance in the absolute intensities of the responses, the intra-laboratory reproducibility was sufficient to support analyses based on the calibration standards and direct comparison controls (DCCs) analyzed alongside the samples. In contrast, ratio analyses displayed inter-laboratory %CV (RSDR) values < 20%; presumably because the ratios are based on inherent properties of the antigenic elements. The excellent performance of the xMAP FADA when performed by analysts of varying proficiency indicates a reliability sufficient to meet analytical needs.


Assuntos
Ensaio de Imunoadsorção Enzimática/métodos , Hipersensibilidade Alimentar/diagnóstico , Hipersensibilidade Alimentar/imunologia , Alérgenos/imunologia , Anticorpos/imunologia , Bioensaio , Reações Cruzadas , Análise de Alimentos/métodos , Humanos , Laboratórios , Espectrometria de Massas , Reprodutibilidade dos Testes
10.
Medicine (Baltimore) ; 99(27): e21055, 2020 Jul 02.
Artigo em Inglês | MEDLINE | ID: mdl-32629732

RESUMO

Food allergen and aeroallergen sensitization are common allergic diseases worldwide, with widely varying estimates of prevalence in children. Our study investigated the characteristics of ingestion and inhalation allergy among children from Sichuan province in Southwest China, so as to get public awareness of these disorders.A total of 1722 children between 0 and 14 years' old were enrolled in this study. They were outpatients in the West China Second University Hospital during June 2019 to September 2019. Serum specific IgE specific to 10 types of food allergen and 10 types of aeroallergen were estimated. Nutrition indicators were tested by electrochemical luminescence.59.70% children were allergic to at least 1 allergen, comprising 24.90% to aeroallergen and 38.81% to food allergen, respectively, whereas 36.28% children were allergic to both aeroallergen and food allergen. Milk was the most common food allergen, and egg came in second place. With regard to aeroallergen, house dust mite held the maximum proportion (65.02%), whereas dust mite followed behind. Inhalation allergy was more commonly seen in boys than girls. Bronchitis was the most common symptom of both allergies. In addition, the highest incidence age for children to be sensitive to food allergen and aeroallergen were 0∼2 years' old and 3∼5 years' old, respectively. It is worth mentioning that there was no significant difference in nutritional status between children with or without allergic diseases.Our findings reveal that milk, egg, house dust mite, and dust mite are the most common allergens among children in Sichuan province. Boys are more susceptible to aeroallergen than girls. Furthermore, the prevalence of ingestion and inhalation allergy varies from different age groups, and has no correlation with nutritional status. In brief, the analysis of the pattern of food allergen and aeroallergen sensitization is invaluable to effective diagnosis and treatment of allergic diseases.


Assuntos
Alérgenos/imunologia , Hipersensibilidade Alimentar/epidemiologia , Imunização/métodos , Adolescente , Alérgenos/efeitos adversos , Animais , Conscientização , Bronquite/epidemiologia , Bronquite/imunologia , Criança , Pré-Escolar , China/epidemiologia , Ingestão de Alimentos/imunologia , Hipersensibilidade a Ovo/epidemiologia , Hipersensibilidade a Ovo/imunologia , Feminino , Hipersensibilidade Alimentar/imunologia , Humanos , Imunoglobulina E/sangue , Incidência , Lactente , Recém-Nascido , Inalação/imunologia , Masculino , Hipersensibilidade a Leite/epidemiologia , Hipersensibilidade a Leite/imunologia , Estado Nutricional/imunologia , Prevalência , Pyroglyphidae/imunologia
11.
South Med J ; 113(6): 267-274, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32483635

RESUMO

Red meat allergies have followed tick bites on every continent except Antarctica. The sensitizing antigen is galactose-α-1,3-galactose (α-gal), an oligosaccharide constituent of nonprimate blood and meat, acquired by ticks during animal bloodfeeding. Because red meat allergy after tick bites is a worldwide phenomenon, the objectives of this review were to describe the global epidemiology of red meat allergy after tick bites and its immunological mechanisms; to identify the human risk factors for red meat allergy after tick bites; to identify the most common tick vectors of red meat allergy worldwide; to describe the clinical manifestations, diagnostic confirmation, and management of patients with red meat allergy after tick bites; and to recommend strategies for the prevention of tick bites. To meet these objectives, Internet search engines were queried with keywords to select scientific articles for review. The keywords included ticks, tick bites, allergy, anaphylaxis, and meat allergy. The study period was defined as 1980-2019. The major risk factors for red meat allergy after tick bites included male sex, non-B blood type, systemic mastocytosis, a bioprosthetic (bovine or porcine) heart valve, and preexisting allergies to gelatin or animal dander. Following confirmation by challenge testing, patients with red meat allergies should avoid red meats, foods containing gelatin, and intravenous immunotherapy with monoclonal antibodies such as cetuximab and infliximab produced in SP2/0 mouse cell lines. Red meat allergy after tick bites represents an emerging threat from tick bites in addition to infectious diseases.


Assuntos
Hipersensibilidade Alimentar/epidemiologia , Picadas de Carrapatos/complicações , Sistema ABO de Grupos Sanguíneos , Animais , Bioprótese , Dissacarídeos/imunologia , Hipersensibilidade Alimentar/diagnóstico , Hipersensibilidade Alimentar/etiologia , Hipersensibilidade Alimentar/imunologia , Próteses Valvulares Cardíacas , Humanos , Ixodidae , Carne Vermelha , Fatores de Risco , Picadas de Carrapatos/prevenção & controle
14.
Allergol. immunopatol ; 48(3): 232-236, mayo-jun. 2020. tab, graf
Artigo em Inglês | IBECS | ID: ibc-192024

RESUMO

BACKGROUND: China and Spain are world leaders in the consumption of edible bulbs (garlic and onion), but there are few references to their capacity to cause allergic symptoms. The target was to study allergic sensitization and clinical symptoms associated with garlic and onion consumption in a large sample of allergic patients. METHODS: An observational cross-sectional study was conducted, testing garlic and onion extracts in 8109 patients of all ages seen by our allergy clinic in 2018. Forty-four aeroallergens and foods were tested, including garlic and onion, with prick test and determination of specific IgE. Oral provocation and contact tests were performed if a delayed reaction was suspected. Western Blot was performed in the serum of patients positive to garlic and onion. RESULTS: We conducted 356,798 skin tests and 4254 specific IgE determinations. Of the 8109 patients tested, 2508 (30.92%) presented with symptoms associated with food intake and, in these patients, food hypersensitivity was detected by skin test, positive specific IgE or provocation in 924 patients, and was caused by garlic or onions in 27, indicating a prevalence of 2.92%. Immunodetection showed an association between the symptoms and a specific LTP to these bulbs, without cross-reactivity with other LTPs in the Mediterranean diet (peach, wheat). CONCLUSIONS: Allergic hypersensitivity to garlic and onions should not be underestimated and, given their high consumption, should be included in the diagnostic food allergy battery


No disponible


Assuntos
Humanos , Masculino , Feminino , Lactente , Criança , Adolescente , Adulto Jovem , Adulto , Pessoa de Meia-Idade , Hipersensibilidade Alimentar/diagnóstico , Alho/imunologia , Imunoglobulina E/sangue , Cebolas/imunologia , Hipersensibilidade Alimentar/imunologia , Testes Cutâneos , Teste de Radioalergoadsorção , Estudos Transversais , Western Blotting
15.
Allergol. immunopatol ; 48(3): 251-258, mayo-jun. 2020. tab
Artigo em Inglês | IBECS | ID: ibc-192027

RESUMO

INTRODUCTION AND OBJECTIVES: Allergy to galactose-α-1,3-galactose (alpha-gal) is a peculiar form of food allergy generally manifesting as an anaphylactic reaction hours after mammalian meat consumption, due to the presence of specific IgE against this oligosaccharide. In addition, immediate anaphylaxis may develop after exposure to other sources of alpha-gal, such as monoclonal antibody cetuximab, vaccines, plasma expanders or anti-snake venoms. Sensitization to alpha-gal has also been implicated in the rapid degeneration of biological valve implants, and recognized as a cause of occupational disease in cattle raisers. The implication of tick bites in this type of sensitization has been accepted by all the research groups dedicated to this disease. PATIENTS AND METHOD: The present study describes the clinical and sensitization characteristics of 39 patients diagnosed with alpha-gal allergy in the hospitals of our province (Lugo, Monforte de Lemos and Burela, Spain). RESULTS: Most patients were middle-age males. Of note, is the fact that the series includes the first pediatric patient reported in Spain to date. The predominant clinical manifestations were urticaria or delayed anaphylaxis after consumption of mammalian meat. Seventy-four percent of the patients reported having suffered a previous tick bite, and the clinical presentation of anaphylaxis was significantly more prevalent in those with a persistent local reaction following the bite than in those with no such reaction (p = 0.032). CONCLUSIONS: A review is also made of the disorder which, due to its variable clinical expression, is referred to as alpha-gal syndrome. The study concludes that a diagnosis of alpha-gal allergy should be considered in patients with urticaria-anaphylaxis of uncertain origin or manifesting after the administration of vaccines or products of bovine/porcine origin


No disponible


Assuntos
Humanos , Masculino , Feminino , Adulto , Pessoa de Meia-Idade , Idoso , Idoso de 80 Anos ou mais , Galactose/imunologia , Hipersensibilidade Alimentar/imunologia , Alérgenos/imunologia , Hipersensibilidade Alimentar/diagnóstico , Galactose/efeitos adversos , Hipersensibilidade Tardia/imunologia , Espanha , Imunoglobulina E/imunologia , Anafilaxia/imunologia , Testes Cutâneos , Anticorpos Monoclonais/imunologia
16.
Allergol. immunopatol ; 48(3): 265-269, mayo-jun. 2020. graf, tab
Artigo em Inglês | IBECS | ID: ibc-192029

RESUMO

INTRODUCTION AND OBJECTIVES: A high rate of cross-reactivity has been reported between the specific proteins of hen's egg with proteins of various avian eggs by quantitative immunoelectrophoretic techniques. The aim of this study was to assess the clinical cross-reactivity of different birds' eggs in children with hen's egg allergy based on skin prick test results. MATERIAL AND METHODS: This cross-sectional study enrolled 52 infants with hen's egg allergy and 52 healthy infants with no history of food allergy from October 2018 to April 2019. Skin prick tests were performed in both patient and control groups with fresh extract of white and yolk related to pigeon, duck, goose, turkey, quail, and partridge. RESULTS: Fifty (96.1%) children with hen's egg allergy showed positive sensitization to at least one of the avian eggs. The most frequent positive skin tests were related to quail's white (36 = 69.2%) followed by duck's white (34 = 65.5%), and sensitization was the least frequent in pigeon's yolk (23 = 44.2%). Skin tests of the control group were negative to all the tested extracts. CONCLUSIÓN: Because of fewer sensitizations to some avian eggs, further research should clarify starting oral immunotherapy with the yolk of goose and pigeon in children with hen's egg allergy


No disponible


Assuntos
Humanos , Masculino , Feminino , Lactente , Pré-Escolar , Proteínas do Ovo/imunologia , Hipersensibilidade Alimentar/imunologia , Hipersensibilidade a Ovo/imunologia , Apresentação Cruzada/imunologia , Alérgenos/análise , Hipersensibilidade a Ovo/diagnóstico , Testes Cutâneos/métodos , Estudos Transversais , Imunoterapia/métodos , Inquéritos e Questionários
17.
Allergol. immunopatol ; 48(3): 306-312, mayo-jun. 2020. ilus
Artigo em Inglês | IBECS | ID: ibc-192034

RESUMO

Over the past three decades, the number of obese people has risen steadily. The chronic low-grade inflammatory state and the non-specific activation of the immune system have contributed greatly to the development of obesity-related immunology. Food allergy as a kind of inflammatory disease with abnormal immune response may be associated with obesity. This review begins with the pro-inflammatory immunological effects of adipose tissue in obesity, and explains the possible effects of obesity on food allergy. In short, obesity not only directly causes imbalance of allergic-related immune cells in adipose tissue, but also indirectly causes this consequence through affecting expression of adipocytokines and peroxisome proliferator-activated receptor gamma (PPARγ) in adipose tissue. As a result, circulating levels of pro-inflammatory factors which are partly derived from adipose tissue increase, which might cause intestinal barrier injury. Therefore, obesity may increase the risk of food allergy


No disponible


Assuntos
Humanos , Tecido Adiposo/imunologia , Hipersensibilidade Alimentar/diagnóstico , Obesidade/complicações , Hipersensibilidade Alimentar/metabolismo , Inflamação/etiologia , Hipersensibilidade Alimentar/imunologia , Obesidade/imunologia , Tecido Adiposo/patologia
18.
Acta Biomed ; 91(2): 204-206, 2020 05 11.
Artigo em Inglês | MEDLINE | ID: mdl-32420946

RESUMO

In children with food allergy the visits should be limited to those that are unequivocally needed on clinical basis. Food challenge can be performed in selected situations, taking a more detailed history to make sure that patients provide whatever information we need. The maintenance of a safe diet can be hampered by several factors. Nutritional supplementation may be necessary.


Assuntos
Betacoronavirus , Infecções por Coronavirus , Hipersensibilidade Alimentar , Pandemias , Pneumonia Viral , Administração Oral , Criança , Infecções por Coronavirus/complicações , Hipersensibilidade Alimentar/complicações , Hipersensibilidade Alimentar/imunologia , Hipersensibilidade Alimentar/terapia , Humanos , Imunoterapia , Pneumonia Viral/complicações
19.
Yonsei Med J ; 61(6): 524-532, 2020 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-32469176

RESUMO

PURPOSE: Specific IgG4 (sIgG4) increases with allergen specific immunotherapy and may reflect a state of immune tolerance in food allergy. While ImmunoCAP® has been widely used to measure sIgG4 to a single allergen, PROTIA™ Specific IgG4® has been designed as a multiplex assay for measuring sIgG4. This study sought to validate this assay in comparison to ImmunoCAP®. MATERIALS AND METHODS: Measurements of sIgG4 were compared between PROTIA™ Specific IgG4® and ImmunoCAP® using sera from 519 allergy patients (asthma: 114, allergic rhinitis: 318, food allergy: 146) with 731 paired tests. sIgG4 was measured against nine inhalant allergens (Dermatophagoides pteronyssinus, Dermatophagoides farinae, cat dander, dog dander, birch pollen, oak pollen, ragweed pollen, mugwort pollen, and Alternaria alternata spores) and nine food allergens (egg white, casein, wheat, peanut, walnut, crab, shrimp, apple, and peach). RESULTS: PROTIA™ Specific IgG4® showed 95.6% agreement rate with ImmunoCAP® in the positivity comparison. For sIgG4 positivity to each individual allergen, an agreement rate of more than 84.8% was observed. In Cohen's kappa analysis, these assays displayed substantial correlations [Cohen's kappa coefficient (κ) ≥0.699], except for shrimp (κ=0.448). Furthermore, both assays displayed strong correlations in quantitative comparisons [correlation coefficients value (ρ) ≥0.8014], except for apple (ρ=0.6571, p=0.175). Serial dilution tests also showed consistency between the assays. CONCLUSION: PROTIA™ Specific IgG4® showed high consistency with ImmunoCAP® in measuring sIgG4. This assay is applicable to various clinical fields, including allergen immunotherapy and food allergy.


Assuntos
Imunoensaio/métodos , Imunoglobulina G/sangue , Adolescente , Adulto , Alérgenos/imunologia , Animais , Criança , Pré-Escolar , Hipersensibilidade Alimentar/imunologia , Humanos , Masculino , Pessoa de Meia-Idade , Reprodutibilidade dos Testes , Titulação por Diluição de Reatividade a Testes Cutâneos , Adulto Jovem
20.
Toxicol Lett ; 333: 312-321, 2020 Oct 15.
Artigo em Inglês | MEDLINE | ID: mdl-32473296

RESUMO

INTRODUCTION: This 4-center study is part of a project to validate a food allergy murine model for safety testing of hydrolyzed infant formulas. AIM: The aim of the current multi-center experiment was to evaluate the residual allergenicity of three partial hydrolyzed whey proteins (pWH) in a multiple-parameter cow's milk allergy murine model and to compare to the classically used guinea pig model. Previous work showed differences in the magnitude of the allergic response to whey between centers. To get a first insight in the effect of housing on the robustness of the mouse model, microbiota composition of non-sensitized mice was analyzed and compared between centers. METHODS: Mice were sensitized intragastrically (i.g.) with whey, pWH or eWH using cholera toxin as an adjuvant. In mice, whey-IgE/IgG1, acute allergic symptoms were determined upon whey challenge. Guinea pigs were orally sensitized ad libitum via the drinking water (day 0-37) and challenged intravenously with whey on day 49. The microbial composition in fecal samples was determined in non-sensitized mice in all 4 research centers before and after conduct of the study. RESULTS: Elevated levels of whey-IgG1 were detected in whey-sensitized mice in all centers. Except for pWH-A in center 4, we observed elevated levels of whey-IgE in whey-sensitized mice and mice sensitized with pWH-A, -B, -C. Center 2 was excluded from further analysis because of non-significant IgE levels in the positive control. In contrast to whey-mice, pWH-A treated mice showed no acute skin response, mMCP-1 release or change in body temperature upon whey challenge in all centers, which corresponds with the absence of anaphylactic shock symptoms in both the mouse and guinea pig model. pWH-B and -C induced anaphylactic shock symptoms in the guinea-pig and mice whereas results on the remaining allergic outcomes in mice were inconclusive. No differences in microbiota composition were measured in response to the challenge and Microbiota composition depended on the location of the centers. CONCLUSIONS: Both animal models showed comparable results on the residual allergenicity of partial hydrolyzed whey proteins, but none of the centers was able to differentiate between the residual sensitizing capacities of the pWH-B and -C based on a single elicitation parameter in the murine model. Differences in microbiota composition might contribute to the robustness of the food allergy murine model. For a well-balanced prediction on the potential allergenicity of hydrolyzed infant formulas a multiple murine parameter model is suggested to decrease the risk of false positive or false negative results. A future challenge is to develop an overall scoring system for proper risk assessment, taking all parameters into account.


Assuntos
Modelos Animais de Doenças , Hipersensibilidade Alimentar/imunologia , Hipersensibilidade a Leite/imunologia , Proteínas do Leite/imunologia , Proteínas do Soro do Leite/imunologia , Animais , Cobaias , Humanos , Imunoglobulina E/sangue , Imunoglobulina G/sangue , Lactente , Fórmulas Infantis , Laboratórios/normas , Camundongos , Hipersensibilidade a Leite/sangue
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