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Hoyer A, Rehbinder EM, Färdig M, Asad S, Lødrup Carlsen KC, Endre KMA, Granum B, Haugen G, Hedlin G, Monceyron Jonassen C, Katayama S, Konradsen JR, Landrø L, LeBlanc M, Mägi Olsson CA, Rudi K, Skjerven HO, Staff AC, Vettukattil R, Bradley M, Nordlund B, Söderhäll C. Filaggrin mutations in relation to skin barrier and atopic dermatitis in early infancy. Br J Dermatol 2021; 186:544-552. [PMID: 34698386 DOI: 10.1111/bjd.20831] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/24/2021] [Indexed: 11/27/2022]
Abstract
BACKGROUND Loss-of-function mutations in the skin barrier gene filaggrin (FLG) increase the risk of atopic dermatitis (AD), but their role in skin barrier function, dry skin and eczema in infancy is unclear. OBJECTIVES To determine the role of FLG mutations for impaired skin barrier function, dry skin, eczema and AD at three months of age and through infancy. METHODS FLG mutations were analyzed in 1836 infants in the Scandinavian population-based PreventADALL study. Transepidermal water loss (TEWL), dry skin, eczema and AD were assessed at three, six and 12 months of age. RESULTS Filaggrin mutations were observed in 166 (9%) infants. At three months, carrying FLG mutations was not associated with impaired skin barrier function (TEWL > 11.3 g/m2 /h) or dry skin, but with eczema (OR(95%CI): 2.76 (1.81, 4.23), p < 0.001). At six months, mutation carriers had significantly higher TEWL than non-mutation carriers (mean (95%CI) 9.68 (8.69, 10.68) vs. 8.24 (7.97, 8.15), p < 0.01) and at three and six months an increased risk of dry skin on truncus (OR: 1.87 (1.25, 2.80), p = 0.002; 2.44 (1.51, 3.95), p < 0.001) or extensor limb surfaces (1.52 (1.04, 2.22), p = 0.028; 1.74 (1.17, 2.57), p = 0.005). FLG mutations were associated with eczema and AD in infancy. CONCLUSION Filaggrin mutations were not associated with impaired skin barrier function or dry skin in general at three months of age, but increased the risk for eczema, as well as for dry skin on truncus and extensors at three and six months.
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Affiliation(s)
- A Hoyer
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
| | - E M Rehbinder
- Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Dermatology and Venerology, Oslo University Hospital, Oslo, Norway
| | - M Färdig
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.,Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden
| | - S Asad
- Dermatology Unit, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - K C Lødrup Carlsen
- Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - K M A Endre
- Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Dermatology and Venerology, Oslo University Hospital, Oslo, Norway
| | - B Granum
- Department of Environmental Health, Norwegian Institute of Public Health, Oslo, Norway
| | - G Haugen
- Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Division of Obstetrics and Gynaecology, Oslo University Hospital, Oslo, Norway
| | - G Hedlin
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.,Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden
| | - C Monceyron Jonassen
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway.,Genetic Unit, Centre for Laboratory Medicine, Østfold Hospital Trust, Kalnes, Norway
| | - S Katayama
- Folkhälsan Research Center, Helsinki, Finland.,Department of Biosciences and Nutrition, Karolinska Institute, Huddinge, Sweden.,Stem Cells and Metabolism Research Program, University of Helsinki, Helsinki, Finland
| | - J R Konradsen
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.,Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden
| | - L Landrø
- Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Department of Dermatology and Venerology, Oslo University Hospital, Oslo, Norway
| | - M LeBlanc
- Oslo Centre for Biostatistics and Epidemiology, Oslo University Hospital, Oslo, Norway
| | - C A Mägi Olsson
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.,Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden
| | - K Rudi
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
| | - H O Skjerven
- Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - A C Staff
- Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Division of Obstetrics and Gynaecology, Oslo University Hospital, Oslo, Norway
| | - R Vettukattil
- Faculty of Medicine, Institute of Clinical Medicine, University of Oslo, Oslo, Norway.,Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - M Bradley
- Dermatology Unit, Department of Medicine Solna, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
| | - B Nordlund
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.,Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden
| | - C Söderhäll
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.,Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden
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2
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Endre KMA, Landrø L, LeBlanc M, Gjersvik P, Lødrup Carlsen KC, Haugen G, Hedlin G, Jonassen CM, Nordlund B, Rudi K, Skjerven HO, Staff AC, Söderhäll C, Vettukattil R, Rehbinder EM. Diagnosing atopic dermatitis in infancy using established diagnostic criteria: a cohort study. Br J Dermatol 2021; 186:50-58. [PMID: 33511639 DOI: 10.1111/bjd.19831] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/26/2021] [Indexed: 02/07/2023]
Abstract
BACKGROUND Diagnosing atopic dermatitis (AD) in infants is challenging. OBJECTIVES To determine the incidence and persistence of eczema and AD in infants using the UK Working Party (UKWP) and Hanifin and Rajka (H&R) criteria. METHODS A cohort of 1834 infants was examined clinically at 3, 6 and 12 months of age. AD was diagnosed by UKWP (3, 6 and 12 months) and H&R (12 months) criteria. Logistic regression models were used to assess the relationship between AD and eczema. RESULTS Eczema was observed in 628 (34·2%) infants (n = 240, n = 359 and n = 329 at 3, 6 and 12 months, respectively), with AD diagnosed in 212 (33·7%) infants with any eczema and in 64/78 (82%) infants with eczema at all three visits. The odds of AD were lower with first presentation of eczema at 6 [odds ratio (OR) 0·33, 95% confidence interval (CI) 0·22-0·48] or 12 months (OR 0·49, 95% CI 0·32-0·74) than at 3 months, and higher in infants with eczema at three (OR 23·1, 95% CI 12·3-43·6) or two (OR 6·5, 95% CI 4·3-9·9) visits vs. one visit only. At 12 months, 156/329 (47·4%) fulfilled the UKWP and/or H&R criteria; 27 (8%) fulfilled the UKWP criteria only and 65 (20%) only the H&R criteria. Of the 129 infants who fulfilled the H&R criteria, 44 (34·1%) did not meet the itch criterion. CONCLUSIONS Used in combination and at multiple timepoints, the UKWP and H&R criteria for AD may be useful in clinical research but may have limited value in most other clinical settings.
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Affiliation(s)
- K M A Endre
- Department of Dermatology and Venerology, Oslo University Hospital, Oslo, Norway.,University of Oslo, Faculty of Medicine, Institute of Clinical Medicine, Oslo, Norway
| | - L Landrø
- Department of Dermatology and Venerology, Oslo University Hospital, Oslo, Norway.,University of Oslo, Faculty of Medicine, Institute of Clinical Medicine, Oslo, Norway
| | - M LeBlanc
- Oslo Centre for Biostatistics and Epidemiology, Oslo University Hospital, Oslo, Norway
| | - P Gjersvik
- Department of Dermatology and Venerology, Oslo University Hospital, Oslo, Norway.,University of Oslo, Faculty of Medicine, Institute of Clinical Medicine, Oslo, Norway
| | - K C Lødrup Carlsen
- University of Oslo, Faculty of Medicine, Institute of Clinical Medicine, Oslo, Norway.,Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - G Haugen
- University of Oslo, Faculty of Medicine, Institute of Clinical Medicine, Oslo, Norway.,Division of Obstetrics and Gynaecology, Oslo University Hospital, Oslo, Norway
| | - G Hedlin
- Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden.,Department of Women´s and Children´s Health, Karolinska Institutet, Stockholm, Sweden
| | - C M Jonassen
- Genetic Unit, Centre for Laboratory Medicine, Østfold Hospital Trust, Kalnes, Norway.,Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
| | - B Nordlund
- Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden.,Department of Women´s and Children´s Health, Karolinska Institutet, Stockholm, Sweden
| | - K Rudi
- Faculty of Chemistry, Biotechnology and Food Science, Norwegian University of Life Sciences, Ås, Norway
| | - H O Skjerven
- University of Oslo, Faculty of Medicine, Institute of Clinical Medicine, Oslo, Norway.,Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - A C Staff
- University of Oslo, Faculty of Medicine, Institute of Clinical Medicine, Oslo, Norway.,Division of Obstetrics and Gynaecology, Oslo University Hospital, Oslo, Norway
| | - C Söderhäll
- Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden.,Department of Women´s and Children´s Health, Karolinska Institutet, Stockholm, Sweden
| | - R Vettukattil
- University of Oslo, Faculty of Medicine, Institute of Clinical Medicine, Oslo, Norway.,Division of Paediatric and Adolescent Medicine, Oslo University Hospital, Oslo, Norway
| | - E M Rehbinder
- Department of Dermatology and Venerology, Oslo University Hospital, Oslo, Norway.,University of Oslo, Faculty of Medicine, Institute of Clinical Medicine, Oslo, Norway
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3
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Rehbinder E, Winger A, Landrø L, Asarnoj A, Berents T, Carlsen K, Hedlin G, Jonassen C, Nordlund B, Sandvik L, Skjerven H, Söderhäll C, Vettukattil R, Carlsen K. Dry skin and skin barrier in early infancy. Br J Dermatol 2019; 181:218-219. [DOI: 10.1111/bjd.17626] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- E.M. Rehbinder
- Oslo University Hospital and University of Oslo Oslo Norway
| | - A.J. Winger
- Oslo University Hospital and University of Oslo Oslo Norway
| | - L. Landrø
- Oslo University Hospital and University of Oslo Oslo Norway
| | - A. Asarnoj
- Karolinska University Hospital and Karolinska Institutet Stockholm Sweden
| | - T.L. Berents
- Oslo University Hospital and University of Oslo Oslo Norway
| | - K.H. Carlsen
- Oslo University Hospital and University of Oslo Oslo Norway
| | - G. Hedlin
- Karolinska University Hospital and Karolinska Institutet Stockholm Sweden
| | | | - B. Nordlund
- Karolinska University Hospital and Karolinska Institutet Stockholm Sweden
| | - L. Sandvik
- Oslo University Hospital and University of Oslo Oslo Norway
| | - H.O. Skjerven
- Oslo University Hospital and University of Oslo Oslo Norway
| | - C. Söderhäll
- Karolinska University Hospital and Karolinska Institutet Stockholm Sweden
| | - R. Vettukattil
- Oslo University Hospital and University of Oslo Oslo Norway
| | - K.C.L. Carlsen
- Oslo University Hospital and University of Oslo Oslo Norway
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4
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Henckel E, Svenson U, Nordlund B, Berggren Broström E, Hedlin G, Degerman S, Bohlin K. Telomere length was similar in school-age children with bronchopulmonary dysplasia and allergic asthma. Acta Paediatr 2018; 107:1395-1401. [PMID: 29476624 DOI: 10.1111/apa.14294] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/15/2017] [Revised: 02/07/2018] [Accepted: 02/19/2018] [Indexed: 11/26/2022]
Abstract
AIM Inflammation is a major factor in the pathophysiology of bronchopulmonary dysplasia (BPD), and it contributes to accelerated telomere shortening and cellular ageing. This study aimed to determine its effect on telomere length and lung function in school-aged children born preterm with BPD. METHODS We examined 29 children with BPD, born preterm in Stockholm county 1998-99, along with 28 children with allergic asthma born at term matched for age and gender. At 10 years of age, we measured relative telomere length (RTL) in blood by quantitative polymerase chain reaction, lung function by spirometry and inflammation by fractional exhaled nitric oxide and blood cytokines. RESULTS RTL was not different in preterm born with BPD compared to term born children with asthma. The gender effect was strong in both groups; girls had significantly longer median RTL than boys (1.8 versus 1.5, p < 0.01). Short RTL was associated with low forced expiratory flow, also after adjusting for gender, but was not affected by severity of BPD or ongoing inflammation. CONCLUSION Telomere length was similar in 10-year-old children born preterm with a history of BPD and term born children with allergic asthma. However, impaired lung function and male gender were associated with short telomeres.
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Affiliation(s)
- E Henckel
- Department of Clinical Science, Intervention and Technology; Karolinska Institutet; Stockholm Sweden
- Department of Neonatology; Karolinska University Hospital; Stockholm Sweden
| | - U Svenson
- Department of Medical Biosciences; Umeå University; Umeå Sweden
| | - B Nordlund
- Department of Women and Children′s Health; Karolinska Institutet and Astrid Lindgren Children's Hospital; Karolinska University Hospital; Stockholm Sweden
| | - E Berggren Broström
- Department of Paediatrics; Sachs' Children and Youth Hospital; Stockholm Sweden
- Department of Clinical Science and Education; Södersjukhuset; Karolinska Institutet; Stockholm Sweden
| | - G Hedlin
- Department of Women and Children′s Health; Karolinska Institutet and Astrid Lindgren Children's Hospital; Karolinska University Hospital; Stockholm Sweden
| | - S Degerman
- Department of Medical Biosciences; Umeå University; Umeå Sweden
| | - K Bohlin
- Department of Clinical Science, Intervention and Technology; Karolinska Institutet; Stockholm Sweden
- Department of Neonatology; Karolinska University Hospital; Stockholm Sweden
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5
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Vetander M, Protudjer JLP, Lilja G, Kull I, Hedlin G, van Hage M, Östblom E, Bergström A, Wickman M. Anaphylaxis to foods in a population of adolescents: incidence, characteristics and associated risks. Clin Exp Allergy 2017; 46:1575-1587. [PMID: 27790764 DOI: 10.1111/cea.12842] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2016] [Revised: 09/28/2016] [Accepted: 10/06/2016] [Indexed: 12/14/2022]
Abstract
BACKGROUND Information about severe reactions to foods in adolescence is limited. OBJECTIVE To describe reactions to foods, including anaphylaxis, with regard to incidence, characteristics and associated risks, among 16-year-olds (adolescents) in a large, population-based birth cohort. METHODS Parent-reported questionnaire data from ages 2-3 months, and 1, 2 and 16 years were used (N = 3153). Anaphylaxis at age 16 years was defined per NIAID/FAAN criteria. Immunoglobulin E (IgE) antibodies to 14 common food and inhalant allergens were analysed at ages 4 (n = 2283) and 16 years (n = 2510). Among adolescents with food-related symptoms (FRS) and for whom blood was available (n = 221), 25 additional food allergen extracts or allergen components were analysed. Associations between reactions to foods, and sensitization and allergic multimorbidity were investigated. RESULTS In the 12 months prior to the 16-year assessment, 8.5% of adolescents had FRS. This included 0.8% (n = 24) adolescents who were classified as having anaphylaxis, yielding an incidence rate of 761/100 000 person-years. One-third of adolescents accessed health care during anaphylaxis. Allergic multimorbidity in infancy, as well as sensitization to foods and airborne allergens at age 4 years, was associated with an increased risk for FRS in adolescence. Peanuts and tree nuts were the most common culprit foods for anaphylaxis, and fruits and vegetables for non-anaphylactic reactions. Adolescents with anaphylaxis were significantly more likely to be sensitized to storage proteins (Ara h 2, Cor a 9, Cor a 14) and to be polysensitized to foods (P < 0.001 vs. non-anaphylactic reactions). CONCLUSIONS AND CLINICAL RELEVANCE The incidence of food-induced anaphylaxis during adolescence in our population-based birth cohort is higher than previously reported. Adolescents with anaphylaxis differ from adolescents with non-anaphylactic FRS with regard to culprit foods and sensitization. Adolescents with previous anaphylaxis are likely to be polysensitized to foods, particularly tree nut and peanut storage proteins, and which warrants consideration at follow-up.
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Affiliation(s)
- M Vetander
- Sachs' Children and Youth Hospital, Södersjukhuset, Stockholm, Sweden.,Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.,Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden
| | - J L P Protudjer
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.,Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden
| | - G Lilja
- Sachs' Children and Youth Hospital, Södersjukhuset, Stockholm, Sweden.,Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
| | - I Kull
- Sachs' Children and Youth Hospital, Södersjukhuset, Stockholm, Sweden.,Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
| | - G Hedlin
- Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden.,Astrid Lindgren Children's Hospital, Karolinska University Hospital, Stockholm, Sweden.,Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden
| | - M van Hage
- Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden.,Department of Medicine Solna, Immunology and Allergy Unit, Karolinska Institutet, and Karolinska University Hospital, Stockholm, Sweden
| | - E Östblom
- Sachs' Children and Youth Hospital, Södersjukhuset, Stockholm, Sweden.,Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden.,Department of Clinical Science and Education, Södersjukhuset, Karolinska Institutet, Stockholm, Sweden
| | - A Bergström
- Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.,Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden
| | - M Wickman
- Sachs' Children and Youth Hospital, Södersjukhuset, Stockholm, Sweden.,Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.,Centre for Allergy Research, Karolinska Institutet, Stockholm, Sweden
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6
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Önell A, Whiteman A, Nordlund B, Baldracchini F, Mazzoleni G, Hedlin G, Grönlund H, Konradsen JR. Allergy testing in children with persistent asthma: comparison of four diagnostic methods. Allergy 2017; 72:590-597. [PMID: 27638292 DOI: 10.1111/all.13047] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/12/2016] [Indexed: 01/09/2023]
Abstract
BACKGROUND Multiple allergic sensitizations are common in persistent childhood asthma, and thorough assessment of allergy is crucial for optimal care of these children. Microarray testing offers opportunities for improved sIgE characterization, which has been projected to be useful in the management of multisensitized patients. OBJECTIVE The aim of this study was to investigate the accuracy and information obtained by two microarray platforms applied on a well-characterized pediatric asthma cohort. METHODS Seventy-one children were recruited from a nationwide Swedish study on severe childhood asthma. Severe (n = 40) and controlled (n = 31) asthmatics were assessed for allergic sensitization by two microarray systems (Microtest and ISAC) and by two standard diagnostic methods (ImmunoCAP and skin prick test). Data on clinical history, physical examination, spirometry, asthma control test, and doctor's diagnosis were collected. Results from the four diagnostic methods were analyzed and compared. RESULTS A high prevalence of allergic sensitization was observed in this cohort. The pairwise concordance between two methods was 90-92% independently of methods compared. The sensitivity of the four methods against doctor's diagnosis was 0.77-0.88, and the specificity was 0.97-0.99. Microarray methods provided new information in 47% of the sensitized children in comparison with results obtained by standard diagnostic methods. CONCLUSION The high prevalence of food and respiratory sensitization supports the clinical guideline recommendation that allergies should be evaluated in all children with suspected asthma. The microarray platforms studied here demonstrated acceptable accuracy and provided refined IgE characterization in 47% of the patients compared to standard extract-based methods.
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Affiliation(s)
| | - A. Whiteman
- Department of Clinical Neuroscience; Karolinska institutet; Stockholm Sweden
| | - B. Nordlund
- Astrid Lindgren Children's Hospital; Karolinska University Hospital; Stockholm Sweden
- Department of Women's and Children's Health; Karolinska Institutet; Stockholm Sweden
| | | | | | - G. Hedlin
- Astrid Lindgren Children's Hospital; Karolinska University Hospital; Stockholm Sweden
- Department of Women's and Children's Health; Karolinska Institutet; Stockholm Sweden
| | - H. Grönlund
- Department of Clinical Neuroscience; Karolinska institutet; Stockholm Sweden
| | - J. R. Konradsen
- Astrid Lindgren Children's Hospital; Karolinska University Hospital; Stockholm Sweden
- Department of Women's and Children's Health; Karolinska Institutet; Stockholm Sweden
- Department of Medicine Solna; Immunology and Allergy Unit; Karolinska Institutet; and Karolinska University Hospital; Stockholm Sweden
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7
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Stenberg-Hammar K, Niespodziana K, Söderhäll C, James A, Cabauatan C, Konradsen JR, Melén E, van Hage M, Valenta R, Hedlin G. Rhinovirus-specific antibody responses in preschool children with acute wheeze reflect severity of respiratory symptoms. Allergy 2016; 71:1728-1735. [PMID: 27444786 DOI: 10.1111/all.12991] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 07/18/2016] [Indexed: 12/18/2022]
Abstract
BACKGROUND Some children with rhinovirus (RV) infections wheeze, but it is unknown whether this is due to more virulent strains of virus or differences in host immune responses. The aim of this study was to investigate the RV species-specific antibody responses measured at a follow-up visit in preschool children in relation to reported time with respiratory symptoms and the presence of different RV species during an acute episode of wheeze. METHOD Nasopharyngeal swabs and blood samples were taken among 120 preschool children (<4 years of age) at an acute episode of wheeze and at a follow-up visit (median 11 weeks later). Nested PCR was used to detect different RV strains, and serum levels of IgG1 against purified recombinant VP1 proteins from representatives of the three RV species (RV-A, RV-B, and RV-C) were measured by ELISA. RESULTS Rhinovirus was detected in 74% (n = 80/108) of the children at the acute visit, and RV-C was the most common subtype (n = 59/80, 74%). An increase in RV-specific IgG1 was seen in 61% (n = 73) of the children at follow-up, most frequently against RV-A (n = 61/73, 86%) irrespective of the RV strains detected by PCR. Increases in RV-specific IgG1 against RV-A or against RV-A and RV-C were significantly associated with more respiratory symptoms (p = 0.03, p = 0.007). CONCLUSION Antibody response to recombinant RV VP1 proteins was associated with longer time with respiratory symptoms.
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Affiliation(s)
- K. Stenberg-Hammar
- Astrid Lindgren Children's Hospital; Karolinska University Hospital; Stockholm Sweden
- Department of Women's and Children′s Health; Karolinska Institutet; Stockholm Sweden
| | - K. Niespodziana
- Division of Immunopathology; Department of Pathophysiology and Allergy Research; Center of Pathophysiology, Infectiology and Immunology; Medical University of Vienna; Vienna Austria
| | - C. Söderhäll
- Department of Women's and Children′s Health; Karolinska Institutet; Stockholm Sweden
- Department of Biosciences and Nutrition; Karolinska Institutet; Stockholm Sweden
| | - A. James
- Institute of Environmental Medicine; Karolinska Institutet; Stockholm Sweden
- Centre for Allergy Research (CfA); Karolinska Institutet; Stockholm Sweden
| | - C.R. Cabauatan
- Division of Immunopathology; Department of Pathophysiology and Allergy Research; Center of Pathophysiology, Infectiology and Immunology; Medical University of Vienna; Vienna Austria
| | - J. R. Konradsen
- Astrid Lindgren Children's Hospital; Karolinska University Hospital; Stockholm Sweden
- Department of Women's and Children′s Health; Karolinska Institutet; Stockholm Sweden
| | - E. Melén
- Institute of Environmental Medicine; Karolinska Institutet; Stockholm Sweden
- Sachs' Children's Hospital; Södersjukhuset; Stockholm Sweden
| | - M. van Hage
- Immunology and Allergy Unit; Department of Medicine; Karolinska Institutet and University Hospital; Solna Stockholm Sweden
| | - R. Valenta
- Division of Immunopathology; Department of Pathophysiology and Allergy Research; Center of Pathophysiology, Infectiology and Immunology; Medical University of Vienna; Vienna Austria
| | - G. Hedlin
- Astrid Lindgren Children's Hospital; Karolinska University Hospital; Stockholm Sweden
- Department of Women's and Children′s Health; Karolinska Institutet; Stockholm Sweden
- Centre for Allergy Research (CfA); Karolinska Institutet; Stockholm Sweden
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8
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Mogensen I, Alving K, Bjerg A, Borres MP, Hedlin G, Sommar J, Dahlén SE, Janson C, Malinovschi A. Simultaneously elevated exhaled nitric oxide and serum-eosinophil cationic protein relate to recent asthma events in asthmatics in a cross-sectional population-based study. Clin Exp Allergy 2016; 46:1540-1548. [PMID: 27513280 DOI: 10.1111/cea.12792] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2016] [Revised: 06/23/2016] [Accepted: 07/20/2016] [Indexed: 12/30/2022]
Abstract
BACKGROUND We have reported that increased fraction of exhaled nitric oxide (FeNO), a measure of TH2 -driven airway inflammation, and blood eosinophil count, a marker of systemic eosinophil inflammation, correlated with asthma attacks in a population-based study. OBJECTIVE To investigate the relation between simultaneously elevated FeNO and serum eosinophil cationic protein (S-ECP) levels and asthma events among asthmatics. METHODS Measurements of FeNO (elevated ≥ 25 ppb) and S-ECP (elevated ≥ 20 ng/mL) were performed in 339 adult asthmatics. Asthma events (attacks and symptoms) were self-reported. RESULTS Simultaneously normal S-ECP and FeNO levels were found in 48% of the subjects. Subjects with simultaneously elevated S-ECP and FeNO (13% of the population) had a higher prevalence of asthma attacks in the preceding 3 months than subjects with normal S-ECP and FeNO (51% vs. 25%, P = 0.001). This was not found for subjects with singly elevated S-ECP (P = 0.14) or FeNO (P = 0.34) levels. Elevated S-ECP and FeNO levels were independently associated with asthma attacks in the preceding 3 months after adjusting for potential confounders (OR (95% CI) 4.2 (2.0-8.8). CONCLUSIONS Simultaneously elevated FeNO and S-ECP levels were related to a higher likelihood of asthma attacks in the preceding 3 months. This indicates that there is a value in measuring both FeNO and systemic eosinophilic inflammation in patients with asthma to identify individuals at high risk of exacerbations. CLINICAL RELEVANCE FeNO and S-ECP are markers for inflammation in asthma, but are dependent on different inflammatory pathways and weakly correlated. Simultaneous measurements of both offer better risk characterization of adult asthmatics.
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Affiliation(s)
- I Mogensen
- Department of Medical Sciences: Lung-, Allergy- and Sleep Research, Uppsala University, Uppsala, Sweden
| | - K Alving
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - A Bjerg
- Department of Women's and Children's Health: Clinical Paediatrics, Karolinska Institute, Stockholm, Sweden
| | - M P Borres
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - G Hedlin
- Department of Women's and Children's Health: Clinical Paediatrics, Karolinska Institute, Stockholm, Sweden
| | - J Sommar
- Department of Public Health and Clinical Medicine: Occupational Medicine, Umeå University, Umeå, Sweden
| | - S-E Dahlén
- Experimental Asthma and Allergy Research Unit: Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - C Janson
- Department of Medical Sciences: Lung-, Allergy- and Sleep Research, Uppsala University, Uppsala, Sweden
| | - A Malinovschi
- Department of Medical Sciences: Clinical Physiology, Uppsala University, Uppsala, Sweden
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9
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Hamsten C, Häggmark A, Grundström J, Mikus M, Lindskog C, Konradsen JR, Eklund A, Pershagen G, Wickman M, Grunewald J, Melén E, Hedlin G, Nilsson P, van Hage M. Protein profiles of CCL5, HPGDS, and NPSR1 in plasma reveal association with childhood asthma. Allergy 2016; 71:1357-61. [PMID: 27145233 DOI: 10.1111/all.12927] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/27/2016] [Indexed: 02/03/2023]
Abstract
Asthma is a common chronic childhood disease with many different phenotypes that need to be identified. We analyzed a broad range of plasma proteins in children with well-characterized asthma phenotypes to identify potential markers of childhood asthma. Using an affinity proteomics approach, plasma levels of 362 proteins covered by antibodies from the Human Protein Atlas were investigated in a total of 154 children with persistent or intermittent asthma and controls. After screening, chemokine ligand 5 (CCL5) hematopoietic prostaglandin D synthase (HPGDS) and neuropeptide S receptor 1 (NPSR1) were selected for further investigation. Significantly lower levels of both CCL5 and HPGDS were found in children with persistent asthma, while NPSR1 was found at higher levels in children with mild intermittent asthma compared to healthy controls. In addition, the protein levels were investigated in another respiratory disease, sarcoidosis, showing significantly higher NPSR1 levels in sera from sarcoidosis patients compared to healthy controls. Immunohistochemical staining of healthy tissues revealed high cytoplasmic expression of HPGDS in mast cells, present in stroma of both airway epithelia, lung as well as in other organs. High expression of NPSR1 was observed in neuroendocrine tissues, while no expression was observed in airway epithelia or lung. In conclusion, we have utilized a broad-scaled affinity proteomics approach to identify three proteins with altered plasma levels in asthmatic children, representing one of the first evaluations of HPGDS and NPSR1 protein levels in plasma.
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Affiliation(s)
- C. Hamsten
- Immunology and Allergy Unit; Department of Medicine Solna; Karolinska Institutet; and Karolinska University Hospital
- Center for Inflammatory Diseases; Karolinska Institutet; Stockholm Sweden
| | - A. Häggmark
- Affinity Proteomics; SciLifeLab; School of Biotechnology; KTH-Royal Institute of Technology; Stockholm Sweden
| | - J. Grundström
- Immunology and Allergy Unit; Department of Medicine Solna; Karolinska Institutet; and Karolinska University Hospital
| | - M. Mikus
- Affinity Proteomics; SciLifeLab; School of Biotechnology; KTH-Royal Institute of Technology; Stockholm Sweden
| | - C. Lindskog
- SciLifeLab; Department of Immunology; Genetics and Pathology; Uppsala University; Uppsala Sweden
| | - J. R. Konradsen
- Astrid Lindgren Children's Hospital; Karolinska University Hospital; Stockholm Sweden
- Department of Women's and Children's Health; Karolinska Institutet; Stockholm Sweden
| | - A. Eklund
- Respiratory Medicine Unit; Department of Medicine Solna and CMM; Karolinska Institutet and Karolinska University Hospital; Stockholm Sweden
| | - G. Pershagen
- Institute of Environmental Medicine; Karolinska Institutet; Stockholm Sweden
| | - M. Wickman
- Institute of Environmental Medicine; Karolinska Institutet; Stockholm Sweden
- Sachs’ Children and Youth Hospital; Södersjukhuset; Stockholm Sweden
| | - J. Grunewald
- Respiratory Medicine Unit; Department of Medicine Solna and CMM; Karolinska Institutet and Karolinska University Hospital; Stockholm Sweden
| | - E. Melén
- Institute of Environmental Medicine; Karolinska Institutet; Stockholm Sweden
- Sachs’ Children and Youth Hospital; Södersjukhuset; Stockholm Sweden
| | - G. Hedlin
- Astrid Lindgren Children's Hospital; Karolinska University Hospital; Stockholm Sweden
- Department of Women's and Children's Health; Karolinska Institutet; Stockholm Sweden
| | - P. Nilsson
- Affinity Proteomics; SciLifeLab; School of Biotechnology; KTH-Royal Institute of Technology; Stockholm Sweden
| | - M. van Hage
- Immunology and Allergy Unit; Department of Medicine Solna; Karolinska Institutet; and Karolinska University Hospital
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10
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Al-Shamkhi N, Alving K, Dahlen SE, Hedlin G, Middelveld R, Bjerg A, Ekerljung L, Olin AC, Sommar J, Forsberg B, Janson C, Malinovschi A. Important non-disease-related determinants of exhaled nitric oxide levels in mild asthma - results from the Swedish GA(2) LEN study. Clin Exp Allergy 2016; 46:1185-93. [PMID: 27138350 DOI: 10.1111/cea.12749] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2015] [Revised: 04/17/2016] [Accepted: 04/23/2016] [Indexed: 01/02/2023]
Abstract
BACKGROUND Fractional exhaled nitric oxide (FeNO) has a potential clinical role in asthma management. Constitutive factors such as age, height and gender, as well as individual characteristics, such as IgE sensitization and smoking, affect the levels of FeNO in population-based studies. However, their effect on FeNO in subjects with asthma has been scarcely studied. OBJECTIVE To study the effects on FeNO of these commonly regarded determinants, as demonstrated in healthy subjects, as well as menarche age and parental smoking, in a population of asthmatics. MATERIAL AND METHODS Fractional exhaled nitric oxide was measured in 557 subjects with asthma from the Swedish GA(2) LEN study. Allergic sensitization was assessed by skin prick tests to most common aeroallergens. Upper airway comorbidities, smoking habits, smoking exposure during childhood and hormonal status (for women) were questionnaire-assessed. RESULTS Male gender (P < 0.001), greater height (P < 0.001) and sensitization to both perennial allergens and pollen (P < 0.001) are related to higher FeNO levels. Current smoking (P < 0.001) and having both parents smoking during childhood, vs. having neither (P < 0.001) or only one parent smoking (P = 0.002), are related to lower FeNO. Women with menarche between 9 and 11 years of age had lower FeNO than those with menarche between 12 and 14 years of age (P = 0.03) or 15 and 17 years of age (P = 0.003). CONCLUSIONS AND CLINICAL RELEVANCE Interpreting FeNO levels in clinical practice is complex, and constitutional determinants, as well as smoking and IgE sensitisation, are of importance in asthmatic subjects and should be accounted for when interpreting FeNO levels. Furthermore, menarche age and parental smoking during childhood and their effects on lowering FeNO deserve further studies.
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Affiliation(s)
- N Al-Shamkhi
- Department of Medical Sciences: Lung- allergy- and sleep research, Uppsala University, Uppsala, Sweden
| | - K Alving
- Department of Women's and Children's Health, Uppsala University, Uppsala, Sweden
| | - S E Dahlen
- Experimental Asthma and Allergy Research Unit, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - G Hedlin
- Department of Women's and Children's Health, Karolinska Institute, Stockholm, Sweden
| | - R Middelveld
- Experimental Asthma and Allergy Research Unit, Institute of Environmental Medicine, Karolinska Institute, Stockholm, Sweden
| | - A Bjerg
- Department of Internal Medicine and Clinical Nutrition, Krefting Research Centre, University of Gothenburg, Gothenburg, Sweden
| | - L Ekerljung
- Department of Internal Medicine and Clinical Nutrition, Krefting Research Centre, University of Gothenburg, Gothenburg, Sweden
| | - A C Olin
- Section of Occupational and Environmental Medicine, Department of Public Health and Community Medicine, Institute of Medicine, Sahlgrenska Academy at University of Gothenburg, Gothenburg, Sweden
| | - J Sommar
- Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine, University of Umeå, Umeå, Sweden
| | - B Forsberg
- Department of Public Health and Clinical Medicine, Occupational and Environmental Medicine, University of Umeå, Umeå, Sweden
| | - C Janson
- Department of Medical Sciences: Lung- allergy- and sleep research, Uppsala University, Uppsala, Sweden
| | - A Malinovschi
- Department of Medical Sciences: Clinical Physiology, Uppsala University, Uppsala, Sweden
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Asarnoj A, Hedlin G, Hage MV, Wickman M. IgE-levels to peanut allergen component Ara h 2: relation to peanut symptoms in 8-year-olds. Clin Transl Allergy 2013. [PMCID: PMC3723517 DOI: 10.1186/2045-7022-3-s3-p92] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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12
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Nilsson N, Sjolander S, Morita E, Berthold M, Hedlin G, Borres M, Nilsson C. Diagnostic value of IgE antibodies to ω-5 gliadin, HMW-glutenin and gliadins in wheat challenged children. Clin Transl Allergy 2013. [PMCID: PMC3723583 DOI: 10.1186/2045-7022-3-s3-p116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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13
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Nilsson N, Nilsson C, Hedlin G, Johansson S, Borres M, Nopp A. Combining Analyses of Basophil Allergen Threshold Sensitivity, CD-sens, and IgE Antibodies to Hydrolyzed Wheat, ω-5 Gliadin and Timothy Grass Enhances the Prediction of Wheat Challenge Outcome. Int Arch Allergy Immunol 2013; 162:50-7. [DOI: 10.1159/000350923] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Accepted: 03/20/2013] [Indexed: 11/19/2022] Open
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14
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Affiliation(s)
- G Hedlin
- Centre for Allergy Research Department of Women's and Children's Health, Karolinska Institutet and Karolinska University Hospital, Stockholm, Sweden
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15
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Papadopoulos NG, Arakawa H, Carlsen KH, Custovic A, Gern J, Lemanske R, Le Souef P, Mäkelä M, Roberts G, Wong G, Zar H, Akdis CA, Bacharier LB, Baraldi E, van Bever HP, de Blic J, Boner A, Burks W, Casale TB, Castro-Rodriguez JA, Chen YZ, El-Gamal YM, Everard ML, Frischer T, Geller M, Gereda J, Goh DY, Guilbert TW, Hedlin G, Heymann PW, Hong SJ, Hossny EM, Huang JL, Jackson DJ, de Jongste JC, Kalayci O, Aït-Khaled N, Kling S, Kuna P, Lau S, Ledford DK, Lee SI, Liu AH, Lockey RF, Lødrup-Carlsen K, Lötvall J, Morikawa A, Nieto A, Paramesh H, Pawankar R, Pohunek P, Pongracic J, Price D, Robertson C, Rosario N, Rossenwasser LJ, Sly PD, Stein R, Stick S, Szefler S, Taussig LM, Valovirta E, Vichyanond P, Wallace D, Weinberg E, Wennergren G, Wildhaber J, Zeiger RS. International consensus on (ICON) pediatric asthma. Allergy 2012; 67:976-97. [PMID: 22702533 DOI: 10.1111/j.1398-9995.2012.02865.x] [Citation(s) in RCA: 259] [Impact Index Per Article: 21.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/30/2012] [Indexed: 01/08/2023]
Abstract
Asthma is the most common chronic lower respiratory disease in childhood throughout the world. Several guidelines and/or consensus documents are available to support medical decisions on pediatric asthma. Although there is no doubt that the use of common systematic approaches for management can considerably improve outcomes, dissemination and implementation of these are still major challenges. Consequently, the International Collaboration in Asthma, Allergy and Immunology (iCAALL), recently formed by the EAACI, AAAAI, ACAAI, and WAO, has decided to propose an International Consensus on (ICON) Pediatric Asthma. The purpose of this document is to highlight the key messages that are common to many of the existing guidelines, while critically reviewing and commenting on any differences, thus providing a concise reference. The principles of pediatric asthma management are generally accepted. Overall, the treatment goal is disease control. To achieve this, patients and their parents should be educated to optimally manage the disease, in collaboration with healthcare professionals. Identification and avoidance of triggers is also of significant importance. Assessment and monitoring should be performed regularly to re-evaluate and fine-tune treatment. Pharmacotherapy is the cornerstone of treatment. The optimal use of medication can, in most cases, help patients control symptoms and reduce the risk for future morbidity. The management of exacerbations is a major consideration, independent of chronic treatment. There is a trend toward considering phenotype-specific treatment choices; however, this goal has not yet been achieved.
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16
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Vetander M, Helander D, Flodström C, Ostblom E, Alfvén T, Ly DH, Hedlin G, Lilja G, Nilsson C, Wickman M. Anaphylaxis and reactions to foods in children--a population-based case study of emergency department visits. Clin Exp Allergy 2012; 42:568-77. [PMID: 22417215 DOI: 10.1111/j.1365-2222.2011.03954.x] [Citation(s) in RCA: 115] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
BACKGROUND Information about acute reactions to foods among children is limited. OBJECTIVE To describe the overall incidence of anaphylaxis in a paediatric emergency department (ED) setting and to describe reactions to foods in relation to sex and age, clinical characteristics and management. METHODS In a review of medical records, children with ED visits at any of three paediatric hospitals in Stockholm County during 2007 were targeted. Inclusion criteria were any adverse reaction to foods or anaphylaxis. RESULTS 383 children fulfilled the inclusion criteria of which 371 had had reactions to foods. The incidence of anaphylaxis was 32 per 100 000 person years irrespective of cause and food was involved in 92%. Tree nuts, particular cashew, and peanut were the most common eliciting foods, and in children under 3 years, reactions to these two food allergens were as common as reactions to milk and egg. Pollen-allergic children seemed to be admitted due to food-induced anaphylaxis more often during the deciduous tree pollen season compared with the rest of the year (P = 0.015). Symptoms from the lower airways occurred in 49% of children with anaphylaxis but without underlying asthma compared with 72% of children with anaphylaxis and asthma, P < 0.01. CONCLUSIONS AND CLINICAL RELEVANCE Reactions to peanut and tree nuts are as common as reactions to milk and egg in early life. Concomitant exposure to airborne allergens seems to increase the risk of anaphylaxis to foods. Among children with anaphylaxis, wheeze is prevalent even in children without asthma diagnosis.
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Affiliation(s)
- M Vetander
- Department of Paediatrics, Sachs' Children's Hospital, Södersjukhuset, Sjukhusbacken 10, Stockholm, Sweden.
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17
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Nordlund B, Konradsen JR, Kull I, Borres MP, Önell A, Hedlin G, Grönlund H. IgE antibodies to animal-derived lipocalin, kallikrein and secretoglobin are markers of bronchial inflammation in severe childhood asthma. Allergy 2012; 67:661-9. [PMID: 22339365 DOI: 10.1111/j.1398-9995.2012.02797.x] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/12/2012] [Indexed: 12/16/2022]
Abstract
BACKGROUND Component-resolved allergy diagnostics enables the detection of crossreactive or species-specific allergen components. This study analysed Immunoglobulin E (IgE) profiles to single allergen components in relation to bronchial inflammation in severe childhood asthma. METHODS Ninety-five schoolchildren were assessed, 39 with controlled mild-to-moderate asthma and 56 uncontrolled severe asthmatics. Allergen components (n = 111) of food allergens, pollen and perennial aeroallergens were analysed using an immunosolid-phase allergen chip. Blood eosinophils (10(9) × l(-1)), bronchial inflammation (FeNO, ppb), lung function (FEV(1)%) and bronchial hyper-responsiveness (BHR) (dose-response slope of methacholine challenge) were measured. RESULTS A specific IgE response to more than three animal-derived components--lipocalin (nMus m 1, rEqu c 1, Fel d 4, rCan f 1, 2), kallikrein (rCan f 5) and secretoglobin (rFel d 1)--was more common among severe asthmatics compared to children with controlled asthma (n = 14 vs n = 3, P = 0.030). These subjects also displayed higher blood eosinophils (0.65 vs 0.39, P = 0.021), higher Fractional exhaled nitric oxide (38 ppb vs 25 ppb, P = 0.021) and increased BHR (112 vs 28, P = 0.002) compared to other severe asthmatics positive to fewer lipocalin/kallikrein/secretoglobin components. Among all sensitized subjects, there were correlations between specific IgE levels for rFel d 4 and nMus m 1 (r = 0.751, P ≤ 0.001) and for rFel d 4 and rEqu c 1 (r = 0.850, P ≤ 0.001). CONCLUSION Multi-sensitization towards lipocalin, kallikrein and secretoglobin components is associated with increased bronchial inflammation in severe asthmatics. In addition, crossreactive patterns were observed between different lipocalin components.
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Affiliation(s)
| | | | | | - M. P. Borres
- Department of Scientific Affairs; Phadia AB; Uppsala; Sweden
| | - A. Önell
- Department of Scientific Affairs; Phadia AB; Uppsala; Sweden
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18
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Abstract
AIM To evaluate health-related quality-of-life (HR-QoL) and the asthma control test (ACT) in children with problematic severe asthma and those with controlled asthma and to identify whether clinical characteristics show correlations with these measurements. METHODS This multicentre cross-sectional study included 93 children in total, 54 with problematic severe asthma and 39 age-matched with controlled asthma. Subjects completed the Paediatric Asthma Quality-of-Life Questionnaire as well as a standardized health questionnaire and the ACT. Objective measurements of exhaled nitric oxide, specific sensitization, pulmonary function and bronchial hyper-responsiveness to methacholine were also taken. RESULTS HR-QoL was reduced in children with problematic severe asthma (5.4 vs. 6.7, p < 0.001), particularly for girls (5.1 vs. 5.6 for boys, p = 0.02), and their ACT scores were also lower (17 vs. 23, p < 0.001) compared with those of subjects with controlled asthma. A HR-QoL score <6.2 discriminated problematic severe asthma from controlled asthma with 85% sensitivity and 97% specificity, as did the ACT score <20 (79% sensitivity and 94% specificity). Objective measures and other clinical characteristics were weakly associated with HR-QoL or ACT score. CONCLUSION Subjective measurements of HR-QoL and asthma control are both equally useful in differentiating children with problematic severe asthma from those with controlled asthma.
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Affiliation(s)
- B Nordlund
- Department of Women's and Children's Health, Karolinska Institutet, Stockholm, Sweden.
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19
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Almqvist C, Wettermark B, Hedlin G, Ye W, Lundholm C. Antibiotics and asthma medication in a large register-based cohort study - confounding, cause and effect. Clin Exp Allergy 2011; 42:104-11. [PMID: 22092483 DOI: 10.1111/j.1365-2222.2011.03850.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2011] [Revised: 07/12/2011] [Accepted: 07/19/2011] [Indexed: 12/22/2022]
Abstract
BACKGROUND An association between asthma and antibiotic usage has been demonstrated, and the issue of reverse causation and confounding by indication is much debated. OBJECTIVE Our aim was to study the association between different classes of antibiotics and prescription of asthma medication in a register-based cohort of all Swedish children, born between July 2005 and June 2009, ever treated with antibiotics. METHODS Data on dispensed prescriptions of antibiotics (ATC-codes J01) and asthma medication (ATC-codes R03A-D) were requested from the Prescribed Drug Register. The association between dispensed prescriptions of different classes of antibiotics and asthma medication was analysed with Cox regression and a descriptive sequence symmetry analysis. RESULTS In total, 211 192 children had received prescriptions of antibiotics. There was a strong association between prescription of antibiotics and prescription of asthma medication. The hazard ratios (HRs) for asthma medication associated with prescription of amoxicillin, penicillin, cephalosporin and macrolides (Gram-positive infections) were stronger than HRs associated with prescription of sulphonamides, trimethoprim and quinolones (urinary tract infections) and flucloxacillin (skin and soft tissue infections), e.g. first year HR = 2.27 (95% confidence intervals 2.17-2.37) as compared with HR = 1.04 (0.78-1.40). The HR associated with broad spectrum antibiotics was significantly higher than the narrow spectrum. CONCLUSIONS AND CLINICAL RELEVANCE Our data suggest that the association between antibiotics and asthma is subject to either reverse causation or confounding by indication due to respiratory tract infections. This implies that careful consideration is required as to whether or not symptoms from the respiratory tract in early childhood should be treated with antibiotics or asthma medication.
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Affiliation(s)
- C Almqvist
- Department of Medical Epidemiology and Biostatistics, Karolinska Institutet, Stockholm, Sweden.
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20
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Hedlin G, Eber E. The changing perspectives of respiratory diseases in infancy and childhood. Breathe (Sheff) 2011. [DOI: 10.1183/20734735.012111] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022] Open
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21
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Bush A, Pedersen S, Hedlin G, Baraldi E, Barbato A, de Benedictis F, Lødrup Carlsen KC, de Jongste J, Piacentini G. Pharmacological treatment of severe, therapy-resistant asthma in children: what can we learn from where? Eur Respir J 2011; 38:947-58. [PMID: 21737557 DOI: 10.1183/09031936.00030711] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
There is a lack of high-quality evidence on what treatment should be used in children with properly characterised severe, therapy-resistant asthma. Data have to be largely extrapolated from trials in children with mild asthma, and adults with severe asthma. Therapeutic options can be divided into medications used in lower doses for children with less severe asthma, and those used in other paediatric diseases but not for asthma (for example, methotrexate). In the first category are high-dose inhaled corticosteroids (ICS) (≤ 2,000 μg · day(-1) fluticasone equivalent), oral prednisolone, the anti-immunoglobulin (Ig)E antibody omalizumab, high-dose long-acting β(2)-agonists, low-dose oral theophylline and intramuscular triamcinolone. If peripheral airway inflammation is thought to be a problem, the use of fine-particle ICS or low-dose oral corticosteroids may be considered. More experimental therapies include oral macrolides, cyclosporin, cytotoxic drugs such as methotrexate and azathioprine, gold salts, intravenous infusions of Ig, subcutaneous β(2)-agonist treatment and, in those sensitised to fungi, oral antifungal therapy with itraconazole or voriconazole. Those with recurrent severe exacerbations, particularly in the context of good baseline asthma control, are particularly difficult to treat; baseline control and lung function must be optimised with the lowest possible dose of ICS, and allergen triggers and exposures minimised. The use of high-dose ICS, leukotriene receptor antagonists or both at the time of exacerbations can be considered. There is no evidence regarding which therapeutic option to recommend. Better evidence is required for all these treatment options, underscoring the need for the international and co-ordinated approach which we have previously advocated.
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Affiliation(s)
- A Bush
- Department of Paediatric Respiratory Medicine, Royal Brompton Hospital, Sydney Street, London SW3 6NP, UK.
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Eber E, Lødrup Carlsen KC, Ratjen F, Turner SW, Dankert-Roelse JE, Ross-Russell RI, Midulla F, Aurora P, Hedlin G. Paediatrics in Barcelona: highlights from the 2010 ERS Annual Congress. Eur Respir J 2011; 37:1514-21. [PMID: 21478214 DOI: 10.1183/09031936.00026311] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
The aim of this update is to describe the paediatric highlights from the 2010 European Respiratory Society Annual Congress in Barcelona, Spain. Abstracts from the seven groups of the Paediatric Assembly (Respiratory physiology, Asthma and allergy, Cystic fibrosis, Respiratory infection and immunology, Neonatology and paediatric intensive care, Respiratory epidemiology and Bronchology) are presented in the context of the current literature.
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Affiliation(s)
- E Eber
- Department of Paediatrics, University Children's Hospital, Medical University of Graz, Auenbruggerplatz 34/2, 8036 Graz, Austria.
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Hedlin G, Eber E, Aurora P, Lødrup Carlsen KC, Ratjen F, Dankert-Roelse JE, Ross-Russell RI, Turner S, Midulla F, Baraldi E, Bush A. Paediatric respiratory disease: past, present and future. Eur Respir J 2010; 36:225-8. [PMID: 20675775 DOI: 10.1183/09031936.00085510] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Lødrup Carlsen KC, Hedlin G, Bush A, Wennergren G, de Benedictis FM, De Jongste JC, Baraldi E, Pedroletti C, Barbato A, Malmström K, Pohunek P, Pedersen S, Piacentini GL, Middelveld RJM, Carlsen KH. Assessment of problematic severe asthma in children. Eur Respir J 2010; 37:432-40. [PMID: 21030450 DOI: 10.1183/09031936.00091410] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Assessment of problematic severe asthma in children should be performed in a step-wise manner to ensure an optimal approach. A four-step assessment scheme is proposed. First, a full diagnostic work-up is performed to exclude other diseases which mimic asthma. Secondly, a multi-disciplinary assessment is performed to identify issues that may need attention, including comorbidities. Thirdly, the pattern of inflammation is assessed, and finally steroid responsiveness is documented. Based upon these four steps an optimal individualised treatment plan is developed. In this article the many gaps in our current knowledge in all these steps are highlighted, and recommendations for current clinical practice and future research are made. The lack of good data and the heterogeneity of problematic severe asthma still limit our ability to optimise the management on an individual basis in this small, but challenging group of patients.
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Affiliation(s)
- K C Lødrup Carlsen
- Dept of Paediatrics, Women and Children's Division, Oslo University Hospital and the Faculty of Medicine, University of Oslo, Oslo, Norway.
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Hedlin G, Bush A, Lødrup Carlsen K, Wennergren G, De Benedictis FM, Melén E, Paton J, Wilson N, Carlsen KH. Problematic severe asthma in children, not one problem but many: a GA2LEN initiative. Eur Respir J 2010; 36:196-201. [PMID: 20595164 DOI: 10.1183/09031936.00104809] [Citation(s) in RCA: 98] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Although most children with asthma are easy to treat with low doses of safe medications, many remain symptomatic despite every therapeutic effort. The nomenclature regarding this group is confusing, and studies are difficult to compare due to the proliferation of terms describing poorly defined clinical entities. In this review of severe asthma in children, the term problematic severe asthma is used to describe children with any combination of chronic symptoms, acute severe exacerbations and persistent airflow limitation despite the prescription of multiple therapies. The approach to problematic severe asthma may vary with the age of the child, but, in general, three steps need to be taken in order to separate difficult-to-treat from severe therapy-resistant asthma. First, confirmation that the problem is really due to asthma requires a complete diagnostic re-evaluation. Secondly, the paediatrician needs to systematically exclude comorbidity, as well as personal or family psychosocial disorders. The third step is to re-evaluate medication adherence, inhaler technique and the child's environment. There is a clear need for a common international approach, since there is currently no uniform agreement regarding how best to approach children with problematic severe asthma. An essential first step is proper attention to basic care.
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Affiliation(s)
- G Hedlin
- Astrid Lindgren Children's Hospital, Q2:05, Karolinska University Hospital, 17176 Stockholm, Sweden.
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Asarnoj A, Movérare R, Ostblom E, Poorafshar M, Lilja G, Hedlin G, van Hage M, Ahlstedt S, Wickman M. IgE to peanut allergen components: relation to peanut symptoms and pollen sensitization in 8-year-olds. Allergy 2010; 65:1189-95. [PMID: 20146729 DOI: 10.1111/j.1398-9995.2010.02334.x] [Citation(s) in RCA: 44] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
BACKGROUND Allergen-specific IgE testing is often performed with crude peanut extract, but the results may be difficult to interpret because of cross-reactions between peanut and other plant allergens. The aim was to investigate IgE reactivity to peanut allergen components in children from a birch-rich region in relation to pollen sensitization and peanut symptoms. METHODS From a birth cohort, clinical parameters were obtained through questionnaires and IgE antibody levels to peanut and birch pollen were measured. Different peanut/birch sensitization phenotypes were defined among 200 selected children. IgE reactivity to peanut and pollen allergen components was analysed using microarray technique. RESULTS Peanut symptoms were reported in 87% of the children with IgE reactivity to any of the peanut allergens Ara h 1, 2 or 3 but not to Ara h 8 (n = 46) vs 17% of children with IgE reactivity to Ara h 8 but not to Ara h 1, 2 or 3 (n = 23), P < 0.001. Furthermore, symptoms were more severe in children with Ara h 1, 2 or 3 reactivity. Children with IgE reactivity both to Ara h 2 and to Ara h 1 or 3 more often reported peanut symptoms than children with IgE only to Ara h 2 (97%vs 70%, P = 0.016), particularly respiratory symptoms (50%vs 9%, P = 0.002). CONCLUSIONS IgE analysis to peanut allergen components may be used to distinguish between peanut-sensitized individuals at risk of severe symptoms and those likely to have milder or no symptoms to peanut if sensitized to pollen allergens and their peanut homologue allergens.
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MESH Headings
- 2S Albumins, Plant/immunology
- Antigens, Plant/immunology
- Arachis/immunology
- Betula/immunology
- Child
- Cohort Studies
- Cross Reactions
- Female
- Glycoproteins/immunology
- Humans
- Immunoglobulin E/blood
- Male
- Peanut Hypersensitivity/complications
- Peanut Hypersensitivity/epidemiology
- Peanut Hypersensitivity/etiology
- Peanut Hypersensitivity/immunology
- Peanut Hypersensitivity/physiopathology
- Pollen/immunology
- Rhinitis, Allergic, Seasonal/complications
- Rhinitis, Allergic, Seasonal/epidemiology
- Rhinitis, Allergic, Seasonal/immunology
- Rhinitis, Allergic, Seasonal/physiopathology
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Affiliation(s)
- A Asarnoj
- National Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
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Lang AM, Konradsen J, Carlsen KH, Sachs-Olsen C, Mowinckel P, Hedlin G, Lødrup Carlsen KC. Identifying problematic severe asthma in the individual child--does lung function matter? Acta Paediatr 2010; 99:404-10. [PMID: 20040073 DOI: 10.1111/j.1651-2227.2009.01625.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
AIM Measures of lung function (usually FEV(1) <80% predicted) are used to classify asthma severity in both adults and children, despite evidence that lung function impairment is less pronounced in the paediatric asthma population. The present study assesses the relevance of lung function measurements as discriminators of severe childhood asthma. METHODS Fifty-one school-aged children with problematic severe asthma, 37 mild-to-moderate asthmatics and 29 healthy controls underwent a comprehensive clinical work-up. Problematic severe asthma was defined in patients exhibiting poor asthma control despite high-dose inhaled corticosteroid treatment and at least one other asthma controller drug. Mild-to-moderate asthmatic children used low-dose inhaled steroids and reported minimal asthma symptoms. RESULTS Baseline FEV(1) values were significantly reduced in children with problematic severe asthma, yet FEV(1) <80% predicted showed a low sensitivity (41%) for discriminating severe vs. mild-to-moderate asthma. Receiver-operated characteristic analysis estimated the optimal cut-off of FEV(1) to be 90% predicted in this population (sensitivity 61%, specificity 83%). Baseline FEV(1)/FVC and FEF(25-75) values were not superior to FEV(1) in discriminating problematic severe asthma, and neither exhaled nitric oxide levels nor bronchial hyperresponsiveness differentiated between the two asthmatic study populations. CONCLUSION Spirometric measurements are insensitive discriminators of problematic severe asthma in childhood.
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Affiliation(s)
- A M Lang
- Department of Paediatrics, Oslo University Hospital, Oslo, Norway.
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Asarnoj A, Ostblom E, Ahlstedt S, Hedlin G, Lilja G, van Hage M, Wickman M. Reported symptoms to peanut between 4 and 8 years among children sensitized to peanut and birch pollen - results from the BAMSE birth cohort. Allergy 2010; 65:213-9. [PMID: 19712120 DOI: 10.1111/j.1398-9995.2009.02138.x] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND Specific IgE tests are sometimes difficult to interpret due to structural similarities between certain food and pollen allergens. This may be the reason why concomitant sensitization to peanut and birch pollen is frequently seen. The aim of this study was to investigate reported symptoms to peanut- and birch pollen in relation to sensitization. METHODS The data originate from 1928 children in the BAMSE birth cohort. Background factors and clinical parameters were obtained and the levels of IgE antibodies to peanut and birch pollen measured at 4 and 8 years. RESULTS IgE antibodies to peanut were found in 5.5% and 7.4% of the children at 4 and 8 years, respectively. The IgE antibody levels to peanut were higher in children sensitized to peanut but not birch than in children sensitized to peanut and birch among both 4- and 8-year-olds (P = 0.093 and P = 0.003, respectively). Eight-year-olds sensitized to peanut but not birch, more often reported symptoms to peanut than children sensitized to both peanut and birch pollen (76%vs 46%, P = 0.002). The probability of reported symptoms to peanut increased significantly with increasing IgE levels to peanut, especially in 8-year-olds not sensitized to birch. CONCLUSIONS Children sensitized to both peanut and birch pollen are less likely to report symptoms to peanut than children sensitized to peanut but not to birch pollen at 8 years. This is likely due to cross reactions between birch pollen and peanut and can explain the high sensitization rate to peanut in areas where birch trees are common.
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Affiliation(s)
- A Asarnoj
- National Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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Konradsen J, Nordlund B, Pedroletti C, Dahlen B, Hedlin G. Identification Of Children With Severe Therapy Resistant Asthma. J Allergy Clin Immunol 2010. [DOI: 10.1016/j.jaci.2009.12.276] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Abstract
The aim of this article is to describe the paediatric highlights from the 2009 European Respiratory Society Annual Congress in Vienna, Austria. The best abstracts from the seven groups of the Paediatric Assembly (asthma and allergy, respiratory epidemiology, cystic fibrosis, respiratory physiology, respiratory infections and immunology, neonatology and paediatric intensive care, and bronchology) are presented alongside findings from the current literature.
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Affiliation(s)
- P L P Brand
- Princess Amalia Children's Clinic, Isala Klinieken, Zwolle, The Netherlands.
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Bush A, de Benedictis FM, Hedlin G, Paton JY, Wennergren G, Wilson NM. Re: A new perspective on concepts of asthma severity and control. Eur Respir J 2009; 33:705-6; author reply 706. [PMID: 19251813 DOI: 10.1183/09031936.00177408] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Asarnoj A, Ostblom E, Kull I, Lilja G, Pershagen G, Hedlin G, van Hage M, Wickman M. Sensitization to inhalant allergens between 4 and 8 years of age is a dynamic process: results from the BAMSE birth cohort. Clin Exp Allergy 2008; 38:1507-13. [PMID: 18644026 PMCID: PMC2610395 DOI: 10.1111/j.1365-2222.2008.03046.x] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
BACKGROUND There is limited knowledge of the development of IgE-antibody levels over time in childhood, with respect to persistency and co-sensitization to specific inhalant allergens. METHODS Data from 2033 children participating in the BAMSE birth cohort was used. Background factors and clinical parameters were obtained and IgE antibody (ab) levels to eight common airborne allergens were measured (>or=0.35 kU(A)/L) when the children were 4 and 8 years of age. RESULTS Between 4 and 8 years the proportion of children sensitized to any of the inhalant allergens tested increased from 15% to 25%. At 4 years IgE-ab to birch and cat dominated, whereas at the age of 8, there was a considerable increase in the proportion of sensitization to timothy and dog. Except for mites and moulds, IgE-ab levels to all aeroallergens increased significantly between 4 and 8 years among those already sensitized at 4. Transient sensitization to inhalant allergen was uncommon. Furthermore, sensitization to birch pollen at 4 years increased the risk for becoming sensitized to timothy, cat and dog later in life. Such an association was not observed among those sensitized primarily to animal dander. CONCLUSIONS There is a prominent process of sensitization at pre-school age to inhalant allergens, and in Northern Europe sensitization to birch pollen early in life seems to be important for this process. Such a process has a probable impact on the development of allergic disease in the growing child.
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Affiliation(s)
- A Asarnoj
- National Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden.
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Grönlund H, Adédoyin J, Reininger R, Varga EM, Zach M, Fredriksson M, Kronqvist M, Szepfalusi Z, Spitzauer S, Grönneberg R, Valenta R, Hedlin G, van Hage M. Higher immunoglobulin E antibody levels to recombinant Fel d 1 in cat-allergic children with asthma compared with rhinoconjunctivitis. Clin Exp Allergy 2008; 38:1275-81. [PMID: 18477016 DOI: 10.1111/j.1365-2222.2008.03003.x] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
BACKGROUND Current diagnosis of allergy and asthma to cat is confirmed using cat dander extract (CDE). We have previously engineered a recombinant major cat allergen, rFel d 1, with properties identical to the natural molecule. OBJECTIVE The aim of the study was to evaluate IgE and IgG4 antibodies to rFel d 1 among sera from cat-allergic children and adults suffering from asthma and/or rhinoconjunctivitis (RC) in populations from Sweden and Austria. METHODS Cat-allergic children and adults from Sweden (n=27 and 31, respectively) and Austria (n=41 and 41) with RC and/or asthma were selected. Sera were tested for IgE and IgG4 antibodies to CDE and rFel d 1 by CAP, and IgE to rFel d 1 by ELISA. Healthy subjects and non-cat-allergic patients (n=75) were included as controls. RESULTS There was a high correlation between IgE responses to rFel d 1 and CDE among the 140 patients (r(s)=0.85, P<0.001); however, measured levels to rFel d 1 were on average 30% higher (P<0.0001). Ninety-eight percent of patients and none of the controls showed IgE to rFel d 1 and there was a threefold increased risk of asthma for half of the children with the highest IgE levels [odds ratio 3.23; 95% confidence interval (CI), 1.19-8.79] by ELISA. IgE responses to rFel d 1 among children with asthma were higher (median 19.4 kU/L) compared with children with RC (median 6.6 kU/L, P<0.05) and adults with asthma (median 3.0 kU/L, P<0.01). Furthermore, children with asthma displayed higher IgG4 levels than the asthmatic adults. CONCLUSION A single recombinant molecule, rFel d 1, is at least as sensitive for in vitro diagnostics of cat allergy as the current extract-based test. Elevated IgE antibody levels to Fel d 1 are suggested to be a risk factor for asthma in cat-allergic children.
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Affiliation(s)
- H Grönlund
- Department of Medicine, Clinical Immunology and Allergy Unit, Karolinska Institutet and University Hospital, Stockholm, Sweden.
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Bisgaard H, Pedersen S, Anhøj J, Agertoft L, Hedlin G, Gulsvik A, Bjermer L, Carlsen KH, Nordvall L, Lundbäck B, Wennergren G, Werner S, Bønnelykke K, Weiss ST. Determinants of lung function and airway hyperresponsiveness in asthmatic children. Respir Med 2007; 101:1477-82. [PMID: 17336509 DOI: 10.1016/j.rmed.2007.01.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2006] [Accepted: 01/09/2007] [Indexed: 11/26/2022]
Abstract
BACKGROUND Asthma patients exhibit an increased rate of loss of lung function. Determinants to such decline are largely unknown and the modifying effect of steroid therapy is disputed. This cross-sectional study aimed to elucidate factors contributing to such decline and the possible modifying effect of steroid treatment. METHODS We analyzed determinants of lung function and airway hyperresponsiveness (AHR) in a Scandinavian study of 2390 subjects from 550 families. Families were selected for the presence of two or more asthmatic children as part of a genetic study, Scandinavian Asthma Genetic Study (SAGA). RESULTS The primary analysis studied the association between the lung function and delay of inhaled corticosteroids (ICS) after asthma diagnosis among asthmatic children and young adults with a history of regular ICS treatment (N=919). FEV(1) percent predicted (FEV(1)% pred) was 0.25% lower per year of delay from diagnosis until treatment (p=0.039). This association was significantly greater in allergy skin prick test negative children. There was no significant influence of gender, age at asthma onset, or smoking. In the secondary analysis of the whole population of 2390 asthmatics and non-asthmatics, FEV(1)% pred was inversely related to having asthmatic siblings (-7.9%; p<0.0001), asthma diagnosis (-2.7%; p=0.0007), smoking (-3.5%; p=0.0027), and positive allergy skin prick test (-0.47% per test; p=0.012), while positively related to being of female gender (1.8%; p=0.0029). Risk of AHR was higher by having asthmatic siblings (OR 2.7; p<0.0001), being of female gender (OR 2.0; p<0.0001), and having asthma (OR 2.0; p<0.0001). CONCLUSIONS These data suggest that lung function is lower in asthmatics with delayed introduction of ICS therapy, smoking, and positive allergy skin prick test. Lung function is lower and AHR higher in female asthmatics and subjects with asthmatic siblings or established asthma.
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Affiliation(s)
- H Bisgaard
- Danish Paediatric Asthma Center, Copenhagen University Hospital, Gentofte, DK-2900 Copenhagen, Denmark.
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Landgren E, Bråbäck L, Hedlin G, Hjern A, Rasmussen F. Psoriasis in Swedish conscripts: time trend and association with T-helper 2-mediated disorders. Br J Dermatol 2006; 154:332-6. [PMID: 16433805 DOI: 10.1111/j.1365-2133.2005.07004.x] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND According to the T-helper (Th)1/Th2 paradigm, it has been argued that Th1-dominated diseases such as psoriasis and Th2-dominated diseases such as asthma and hay fever should be mutually exclusive, as the immune regulatory cells, Th1 and Th2, cross-regulate each other. An increase in asthma and hay fever has occurred in Sweden over the past four to five decades, but the time trend for psoriasis is not clear. OBJECTIVES To assess the prevalence of psoriasis in young Swedish men over a period of three decades and the association between psoriasis and allergic disorders. METHODS Register study based on data from the Swedish Military Service Conscription Register and the Total Population and the Population and Housing Censuses. Psoriasis, asthma (with and without allergic rhinitis) and allergic rhinitis at conscription were studied in 1 226 193 male conscripts in successive cohorts born between 1952 and 1977. RESULTS The prevalence of psoriasis was about 0.5% and it remained stable over three decades. Conscripts with psoriasis and their siblings were less likely to have eczema. The reduced risk of eczema in conscripts with psoriasis was unchanged over time. A reduced risk of allergic rhinitis was also demonstrated in conscripts with psoriasis and their siblings but only in the most recent birth cohort born between 1970 and 1977. CONCLUSIONS A strong genetic influence may explain the unchanged prevalence of psoriasis in Swedish conscripts. A genetic predisposition for psoriasis may confer partial protection from eczema and allergic rhinitis. The inverse relationship between allergic rhinitis and psoriasis appeared to be a recent phenomenon.
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Affiliation(s)
- E Landgren
- Public Health and Research, Sundsvall Hospital, Sundsvall, Sweden
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Kihlström A, Hedlin G, Pershagen G, Troye-Blomberg M, Härfast B, Lilja G. Immunoglobulin G4-antibodies to rBet v 1 and risk of sensitization and atopic disease in the child. Clin Exp Allergy 2005; 35:1542-9. [PMID: 16393319 DOI: 10.1111/j.1365-2222.2005.02373.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
BACKGROUND In 1993 extremely high levels of birch-pollen were recorded in Stockholm, Sweden. This provided an opportunity to evaluate the effects of aeroallergen exposure (exp.) on the early immune response. OBJECTIVE To assess the influence of exp. to birch-pollen during pregnancy and infancy on the allergen-specific IgE- and IgG4-antibody (ab) response and the development of atopic disease in children. METHODS A total of 970 children with atopic heredity and born in Stockholm 1992, 1993 or 1994 were investigated at age 4.5-5 years. They were divided into five groups; high-dose exp. at 1 year of age, high-dose exp. at 0-3 months, low-dose exp. at 0-3 months, high-dose exp. during pregnancy and low-dose exp. during pregnancy. The children were examined and skin prick tested with inhalant and food allergens. IgE abs (against birch-pollen and recombinant Bet v 1(rBet v1)) and IgG4 abs (against rBet v 1) were analysed in serum. All children were assembled in one group to assess the effects of different ab responses (IgE/IgG4) on the development of atopic disease. RESULTS Children exposed to high doses of birch-pollen during the first 3 months of life more often had detectable levels of IgG4 abs to rBet v 1 than the children in the other groups (P < 0.001), independent of sensitization to birch. Overall, the risk of allergic rhinoconjunctivitis was increased among children sensitized to birch-pollen and appeared more pronounced in children without detectable levels of IgG4 ab to rBet v 1 (Odds ratio 9.4; 95% Confidence interval: 5.5-16.1). IgE sensitization to birch-pollen seemed to have a stronger influence on the development of atopic disease than the IgG4-ab response. CONCLUSION Exposure to high doses of inhalant allergens during the early postnatal period is associated with detectable levels of allergen-specific IgG4 ab even at 5 years of age. An immune modulating effect by IgG4 on symptoms of allergic rhinoconjunctivitis is suggested in children sensitized to birch.
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MESH Headings
- Air Pollutants/immunology
- Allergens/immunology
- Betula
- Chi-Square Distribution
- Child, Preschool
- Conjunctivitis, Allergic/diagnosis
- Conjunctivitis, Allergic/immunology
- Environmental Exposure
- Female
- Humans
- Hypersensitivity, Immediate/diagnosis
- Hypersensitivity, Immediate/immunology
- Immunoglobulin E/blood
- Immunoglobulin G/blood
- Infant
- Infant, Newborn
- Logistic Models
- Male
- Pollen
- Pregnancy
- Prenatal Exposure Delayed Effects
- Rhinitis, Allergic, Seasonal/diagnosis
- Rhinitis, Allergic, Seasonal/immunology
- Seasons
- Skin Tests
- Sweden
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Affiliation(s)
- A Kihlström
- Department of Paediatrics, B57, Karolinska University Hospital, Huddinge, S-14186 Stockholm, Sweden.
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Abstract
AIM To investigate if an intervention with extra information and support in a group setting to parents of preschool children could improve adherence and clinical outcome. METHODS This is a controlled, prospective study where the parents of 60 newly diagnosed preschool asthmatic children aged 3 mo-6 y were randomized to either a control group or to an intervention that consisted of four group sessions in close connection with the diagnosis. The basic education on asthma and the written treatment plan were the same in both groups. The outcome measures were questionnaires to the parents and classification of the children according to symptoms and medication. The adherence rate and the burden of asthma were calculated with the help of diaries and weighing of the MDIs used between 12 and 18 mo after inclusion. RESULTS The follow-up rate was 85% after 18 mo. The parents' presence in the sessions was around 70%, with no gender difference. The parents' view on adherence issues improved significantly in the intervention group. In the control group, 30% had poor adherence compared to 8% in the intervention group (p=0.015). Both the parents and the paediatricians underestimated the number of children with poor adherence. The children in the intervention group had significantly fewer exacerbation days during the last 6 mo-2.1 compared to 3.9 d/child-although they had lower inhaled steroid doses after 18 mo. An economic calculation showed that the intervention was profitable. CONCLUSION This intervention resulted in an improvement in the parents' view on adherence, in the measured adherence rates and in the clinical outcome.
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Affiliation(s)
- C-A Hederos
- Barn-ungdomsmedicin mottagningen, Primary Care Research Unit, Karlstad, Sweden.
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Pedroletti C, Lundahl J, Alving K, Hedlin G. Effect of nasal steroid treatment on airway inflammation measured by exhaled nitric oxide in allergic schoolchildren with perennial rhinitis and asthma. J Allergy Clin Immunol 2005. [DOI: 10.1016/j.jaci.2004.12.217] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Almqvist C, Egmar AC, Hedlin G, Lundqvist M, Nordvall SL, Pershagen G, Svartengren M, van Hage-Hamsten M, Wickman M. Direct and indirect exposure to pets - risk of sensitization and asthma at 4 years in a birth cohort. Clin Exp Allergy 2003; 33:1190-7. [PMID: 12956738 DOI: 10.1046/j.1365-2222.2003.01764.x] [Citation(s) in RCA: 113] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
INTRODUCTION There are conflicting data on the association between early exposure to pets and allergic diseases. Bias related to retrospective information on pet ownership has been addressed as a reason for distorted study results. OBJECTIVE To elucidate how early exposure to cat and dog relates to IgE-sensitization and asthma in children at 2 and 4 years of age, in a prospective birth-cohort study. METHODS Four thousand and eighty-nine families with children born 1994-1996 in predefined areas of Stockholm answered questionnaires on environmental factors and symptoms of allergic disease at birth, one, two and four years of age. Dust samples collected from the mothers' beds at birth were analysed for Fel d 1 and Can f 1 in a subgroup of the cohort. Blood samples taken at four years from 2614 children were analysed for allergen-specific IgE to common airborne allergens. Risk associations were calculated with a multiple logistic regression model, with adjustment for potential confounders. RESULTS A correlation was seen between allergen levels and reported exposure to cat and dog. Exposure to cat seemed to increase the risk of cat sensitization, OR (odds ratio) 1.44 (95% confidence interval 1.03-2.01), whereas dog exposure did not have any effect on dog sensitization, OR 1.16 (0.79-1.72). Dog ownership was related to a reduced risk of sensitization to other airborne allergens, OR 0.36 (0.15-0.83), and a similar tendency was seen for cat ownership OR 0.63 (0.37-1.07). Early dog ownership seemed to be associated with a lower risk of asthma, OR 0.50 (0.24-1.03), with no corresponding effect after cat ownership, OR 0.88 (0.56-1.38). CONCLUSION Early exposure to cat seems to increase the risk of sensitization to cat but not of asthma at 4 years of age. Dog ownership, on the other hand, appears to be associated with lowered risk of sensitization to airborne allergens and asthma. Both aetiological relationships and selection effects have to be considered in the interpretation of these findings.
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Affiliation(s)
- C Almqvist
- Occupational and Environmental Health, Karolinska Hospital, Stockholm, Sweden.
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Abstract
BACKGROUND The role of maternal allergen exposure during pregnancy in sensitization and development of atopic disease in the child remains controversial. In the spring of 1993, extremely high levels of birch pollen were recorded in Stockholm, Sweden. In 1994, the corresponding pollen levels were low. The aim of this study was to assess the influence of exposure during pregnancy to high/low doses of birch pollen on the risk of sensitization and development of atopic disease in children. In addition, a comparison was made with children exposed to birch pollen in early infancy. METHODS Three hundred and eighty-seven children with atopic heredity, born in Stockholm in July-October 1993 or 1994 (mothers exposed during pregnancy), were investigated at age 4.5 years. The children were clinically examined and were skin prick tested (SPT) with inhalant and food allergens. IgE antibodies (RAST) against birch pollen and recombinant birch pollen allergen (rBet v 1) were analysed in serum. A comparison was made with a similar group of children exposed during the same incident, but in the first 3 months of life, in 1993. RESULTS The children of mothers high-dose exposed during pregnancy in 1993 tended to be more sensitized (SPT > or = 3 mm) to birch pollen than the children with low-dose exposure during the corresponding period in 1994 (7.6 and 4.6%, respectively, OR: 1.7; 95% CI: 0.7-4.1). A similar but weak tendency was seen for positive RAST analyses (> or =0.35 kU/l) against birch pollen and rBet v 1. Children of mothers high-dose exposed during pregnancy were significantly less sensitized to birch pollen than the children high-dose exposed in early infancy (17.9%, OR: 0.4; 95% CI: 0.2-0.7). There was an overall trend towards a slightly increased prevalence of bronchial asthma, allergic rhinoconjunctivitis and atopic dermatitis in the group with mothers high-dose exposed during pregnancy, compared to those with low exposure. CONCLUSION Exposure of the mother during pregnancy to high levels of birch pollen resulted in a tendency towards increased risk of sensitization to the same allergen and symptoms of atopic disease in children with atopic heredity. Furthermore, our data indicate that exposure of the mother during pregnancy to inhalant allergens is less likely to result in sensitization in the child than exposure of the child in early infancy.
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Affiliation(s)
- A Kihlström
- Department of Paediatrics B57, Huddinge University Hospital, S-14186 Stockholm, Sweden
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Almqvist C, Egmar A, van Hage-Hamsten M, Hedlin G, Nordvall L, Pershagen G, Svartengren M, Wickman M. Risk of sensitization and asthma at four years in a birth cohort with selection of pet ownership. J Allergy Clin Immunol 2003. [DOI: 10.1016/s0091-6749(03)80981-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Lönnkvist K, Moshfegh A, Pedroletti C, Hedlin G, Halldén G, Lundahl J. Increased eosinophil transmigration after nasal allergen challenge in children with allergic asthma and rhinitis. Allergy 2002; 57:1200-4. [PMID: 12464051 DOI: 10.1034/j.1398-9995.2002.23714.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
BACKGROUND Eotaxin and interleukin-5 together provide the signal essential for eosinophil transmigration to airway tissue in allergic reactions. However, it is not known whether peripheral blood eosinophils (PBE) possess an increased transmigration capacity in vitro after allergen challenge in vivo before they leave the circulation. We aimed to determine whether PBE in cat-sensitized children have increased spontaneous and/or eotaxin-induced transmigration capacity in vitro, and to what extent allergen challenge alters this feature. METHODS Fourteen cat-allergic children and four healthy controls underwent nasal challenge with cat-allergen. Blood samples were drawn prechallenge and at 2 h and 24 h postchallenge. We analyzed the in vitro transmigration of PBE, with and without eotaxin as a chemoattractant. We used a transmigration assay with fibronectin-coated membranes. Eosinophil cationic protein (ECP) and PBE counts were run in parallel. RESULTS The spontaneous transmigration capacity of eosinophils in vitro was significantly higher at 2 h after allergen challenge (P < 0.01 vs. prechallenge) and returned to prechallenge levels at 24 h postchallenge (P < 0.02 vs. 2 h postchallenge). Addition of eotaxin further augmented the increased transmigration. In concordance, no accompanying changes were measured in the levels of eosinophils in blood or ECP in serum. Furthermore no spontaneous or eotaxin-induced eosinophil transmigration was detected in healthy controls. CONCLUSION PBE possess increased spontaneous (and eotaxin-induced) capacity to transmigrate as early as 2 h after allergen challenge in allergic children, without accompanying signs of eosinophil activation in terms of increased PBE count or ECP level. This is probably due to the increased stage of activation of the eosinophil, often referred to as "priming".
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Affiliation(s)
- K Lönnkvist
- Astrid Lindgren Children's Hospital, Karolinska Hospital, Karolinska Institutet, Stockholm, Sweden
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Hellman C, Lönnkvist K, Hedlin G, Halldén G, Lundahl J. Down-regulated IL-5 receptor expression on peripheral blood eosinophils from budesonide-treated children with asthma. Allergy 2002; 57:323-8. [PMID: 11906363 DOI: 10.1034/j.1398-9995.2002.1o3482.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND The expression and function of cytokine receptors on peripheral blood eosinophils (PBE) from healthy and asthmatic children are poorly characterized. METHODS The PBE count and expression of IL-5 receptor (R) and GM-CSFR positive PBE was analyzed in nonsteroid-treated asthmatic children (n = 13), budesonide-treated asthmatic children (n = 24) and healthy children (n = 16) by flow cytometry. Alterations in intracellular EG2-epitope expression were used to measure the in vitro responsiveness of PBE to recombinant IL-5 and GM-CSF. RESULTS The PBE count was increased (P < 0.05) in both asthmatic groups, independent of treatment, as compared to healthy children. The IL-5R expression on PBE, as well as the in vitro responsiveness of PBE to recombinant IL-5, was reduced (P < 0.05), in budesonide-treated asthmatic children compared to nonsteroid-treated asthmatic children and healthy children. The proportion of GM-CSFR positive PBE and in vitro responsiveness of PBE to recombinant GM-CSF were not different between the groups. In vitro treatment with budesonide did not down-regulate the proportion of IL-5R positive PBE. CONCLUSIONS Budesonide-treatment of asthmatic children induces a selectively reduced IL-5R expression on PBE, concomitant with a reduced in vitro responsiveness of PBE to IL-5. We suggest that this budesonide-related down-regulation of the IL-5R might be a mechanism by which steroid treatment inhibits the action of IL-5 on eosinophil accumulation and activation in vivo.
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Affiliation(s)
- C Hellman
- Department of Medicine, Division of Clinical Immunology and Allergy, Stockholm, Sweden
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Formgren H, Bergström SE, Boman G, Foucard T, Hedlin G, Hörte LG, Spetz-Nyström U. [Can asthma deaths in young people be predicted and prevented?]. Lakartidningen 2001; 98:5314-5, 5318-21. [PMID: 11763629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/23/2023]
Abstract
UNLABELLED In spite of increased asthma prevalence, the mortality in the disease has decreased during the last two decades in Sweden and in some other countries. However, in the age group 15-24 years an increased death rate was noted at the end of the 1980s. Therefore we started a prospective study from 1994 with the aim of trying to analyse the precipitating factors of all deaths in the ages 1-34 years in which the death certificate alleged asthma or anaphylaxis as the main or contributing cause of death. We conducted a confidential telephone enquiry of the next of kin of the deceased using a modified questionnaire developed by the British Thoracic Association. When available, patient records and post mortem protocols were obtained. RESULTS The mortality in asthma in the ages 1-34 years has decreased from around 5 per million/year to 0.5/million/year over the period 1987-1998. The main preventable factors found in this analysis are undertreatment, non-compliance, psychosocial factors including alcohol/drug abuse, food allergy and inhalation allergy. Lacking awareness of the risks and underestimation of the severity of the asthma both by the physician and the patient seem to be dominating factors.
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Lönnkvist K, Hellman C, Lundahl J, Halldén G, Hedlin G. Eosinophil markers in blood, serum, and urine for monitoring the clinical course in childhood asthma: impact of budesonide treatment and withdrawal. J Allergy Clin Immunol 2001; 107:812-7. [PMID: 11344347 DOI: 10.1067/mai.2001.114246] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND Markers of airway inflammation are needed for prediction of asthma deterioration and evaluation of disease severity. Few studies have focused on the dynamics of airway inflammation as reflected by the activity of the eosinophils and their proteins after withdrawal of inhaled corticosteroids. OBJECTIVE Our goal was to investigate the effect of withdrawal of inhaled budesonide on eosinophil count in blood and eosinophil proteins in serum and urine and to relate the levels of these markers to the risk of symptoms of asthma, increased bronchial hyperresponsiveness, and deterioration of lung function. METHODS Thirty-three children were randomly selected to continue or discontinue use of inhaled budesonide in a double-blind, placebo-controlled study. They were followed up for 4 months with regular analysis of blood, serum, and urine samples; lung function; and methacholine challenges. Eosinophil activity markers were analyzed. Age-matched healthy children provided reference data for all parameters measured. RESULTS The eosinophil number in blood and eosinophil protein levels in serum (serum eosinophil cationic protein [ECP] and serum eosinophil peroxidase [EPO]) increased significantly in the withdrawal group, and the difference between the groups was significant (P =.02 for all). Twenty-nine percent of the children in the withdrawal group remained symptom free. This subgroup had eosinophil counts at baseline below 350/microL, a serum ECP level below 15 microg/L, and a serum EPO level below 25 microg/L, each of which was related to a low risk of exacerbation (relative risk = 0.37, 0.48, and 0.37 respectively; P <.05 for all). All eosinophil markers were lower in the healthy children than in the symptom-free children with asthma. CONCLUSION Our data indicate that eosinophil count and/or ECP and EPO levels can be used to estimate the short-term risk of deterioration and the need for corticosteroid treatment in cases of mild and moderate allergic asthma.
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Affiliation(s)
- K Lönnkvist
- Astrid Lindgren Children's Hospital, Stockholm; and the Department of Laboratory Medicine, Division of Clinical Immunology, Karolinska Hospital, Stockholm
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Almqvist C, Wickman M, Perfetti L, Berglind N, Renström A, Hedrén M, Larsson K, Hedlin G, Malmberg P. Worsening of asthma in children allergic to cats, after indirect exposure to cat at school. Am J Respir Crit Care Med 2001; 163:694-8. [PMID: 11254526 DOI: 10.1164/ajrccm.163.3.2006114] [Citation(s) in RCA: 165] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Exposure to cat allergen at school might exacerbate symptoms in asthmatic children with cat allergy. To study this, we identified 410 children, 6-12 yr of age, who were being treated for asthma (inhaled steroids and beta-agonists), were allergic to cats, and had no cat at home. Peak expiratory flow (PEF), asthma symptoms, medication, fever and/or sore throat, and contact with furred pets were recorded twice daily during the last week of summer holidays and the second and third weeks of school. The number of cat owners in each class was recorded. Ninety-two children with asthma reported no contact with furred pets. Among these, children who attended classes with > 18% (median value) cat owners reported significantly decreased PEF, more days with asthma symptoms, and increased use of medication after school started. Those in classes with < or = 18% cat owners reported no change. Children in classes with many cat owners ran a 9-fold increased risk of exacerbated asthma after school start compared with children in classes with few cat owners, after adjusting for age, sex, and fever and/or sore throat. Thus, asthma symptoms, PEF, and the use of asthma medication in children with cat allergy may be affected by indirect cat exposure at school.
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Affiliation(s)
- C Almqvist
- Department of Environmental Health, Karolinska Hospital, Stockholm, Sweden.
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Abstract
BACKGROUND The International Study of Asthma and Allergies in Childhood (ISAAC) has demonstrated large differences in the prevalence of atopic disorders in children between different regions in the world. Populations with a higher standard of living and a more westernized lifestyle tend to have higher rates of atopy and asthma. Many hypotheses regarding environmental causes of atopic disorder focus on the early childhood environment. OBJECTIVE To study the influence of ethnicity and country of birth for the prevalence of atopic disorders. METHODS The prevalence of atopic disorders in Swedish residents born in Turkey and Chile, who settled in Sweden as adults in the 1980s, was compared with their own Swedish-born children and a sample of Swedish-born parents and their children in interview data from the Survey of Living Conditions in 1996. The study group included 1734 adults 27-60 years of age and their 2964 children aged 3-15. RESULTS The Chilean-born parents and their children had the highest risk for allergic asthma; adjusted odds ratios (ORs) 2.2 (1.2-4.0) and 2.7 (1.6-4.5), respectively, and allergic rhino-conjunctivitis; OR 1.6 (1.1-3) and 1.6 (1.1-2.5) in both groups, when compared with the Swedish-born parents and their children. The Turkish-born parents and their children had the lowest risk for allergic rhino-conjunctivitis; both groups had OR 0.6 (0. 4-0.9) and the children in this group also had the lowest risk for eczema; OR; 0.4 (0.3-0.7). The risk for all atopic disorders was lower in the Turkish group compared with the Chileans. CONCLUSION This study demonstrates that ethnicity is an important determinant of atopic disorder independent of the external childhood environment. The value of international comparisons of environment and risk for atopic disorders can be questioned until more is known about factors related to ethnicity, such as genetic susceptibility and diet, for the development of atopy.
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Affiliation(s)
- A Hjern
- Department of Clinical Sciences, Huddinge University Hospital, Karolinska Institutet, Stockholm; Centre for Epidemiology, National Board of Health and Welfare, Stockholm, Sweden
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Montan PG, Ekström K, Hedlin G, van Hage-Hamsten M, Hjern A, Herrmann B. Vernal keratoconjunctivitis in a Stockholm ophthalmic centre--epidemiological, functional, and immunologic investigations. Acta Ophthalmol Scand 1999; 77:559-63. [PMID: 10551301 DOI: 10.1034/j.1600-0420.1999.770516.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
PURPOSE To classify a cohort of 62 patients with vernal keratoconjunctivitis (VKC) in immunologic, functional, and epidemiological terms. METHODS A retrospective chart review was conducted to establish the patients' ethnic origin and to ascertain the results of standard in vitro and in vivo testing for atopic allergy. The latter data were compared with tear Phadiatop, an allergy screening test, in 31 subjects. Further subgroup analyses included methacholine bronchial provocations, serum screening for chlamydial antibodies and epidemiological calculations of the observed prevalence of VKC in the Stockholm area in 1994. RESULTS Thirty-seven subjects (59.7%) were sensitised to common allergens. No additional allergic subjects were diagnosed with the tear Phadiatop test. The serology for ocular chlamydial disease was negative. Only 6 out of 17 subjects displayed bronchial reactivity to methacholine of whom 4 had a history of asthma. VKC was clearly more common in individuals with an Asian and African origin. CONCLUSIONS Sensitivity to allergens is a strong determinant for the disease but in a large proportion of the subjects this immunologic abnormality is absent. The varying prevalence of the condition in different ethnic groups indicates a genetic predisposing factor.
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Affiliation(s)
- P G Montan
- Department of Ophthalmology, St Eriks Hospital, Stockholm, Sweden.
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Marcus C, Hedlin G. [Asthma, inhalation steroids and growth of children. Effects on the body height are rare but growth check ups are justified]. Lakartidningen 1999; 96:3241-4. [PMID: 10434506] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/13/2023]
Affiliation(s)
- C Marcus
- Sektionen för endokrinologi, diabetes och metabolism, barnkliniken, Huddinge sjukhus
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