Allergy

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Review Article
Allergy
Practical issues of oral immunotherapy for egg or milk allergy
Sukyung Kim, Kangmo Ahn, Jihyun Kim
Clin Exp Pediatr. 2024;67(3):140-148.   Published online June 19, 2023
· Oral immunotherapy should be supervised by pediatricians with experience administering oral food challenge tests and managing allergic reactions.
· Food allergen intake is gradually increased and maintained for years.
· Patients may experience allergic reactions and psychological problems.
· Adjunctive therapies (biologics, antihistamines, and leukotriene receptor antagonists) may improve efficacy and safety.
· Contraindications include uncontrolled asthma, malignancy, active autoimmune disorders, and beta-blocker usage.
Moderate to severe atopic dermatitis in children: focus on systemic Th2 cytokine receptor antagonists and Janus kinase inhibitors
Jeong Hee Kim, Mona Salem Samra
Clin Exp Pediatr. 2024;67(2):64-79.   Published online June 14, 2023
· Atopic dermatitis (AD) is characterized by a strong T helper (Th)2 response, although the extents of Th22, Th17/ interleukin (IL)-23, and Th1 responses vary among disease subtypes.
· Children with moderate to severe AD may require early systemic therapy to reduce the systemic inflammation caused by increased Th2 cytokine levels.
· Dupilumab, which blocks IL-4/IL-13 receptor, has equivalent efficacy for extrinsic and intrinsic AD and a favorable safety profile in infants and children aged 6 months and older.
Natural course of IgE-mediated food allergy in children
Kyunguk Jeong, Sooyoung Lee
Clin Exp Pediatr. 2023;66(12):504-511.   Published online June 14, 2023
· Dendritic, regulatory T, and regulatory B cells significantly contribute to the natural course of food allergy.
· Cow’s milk and hen’s egg allergies tend to resolve in earlier childhood but recent studies show that 50% of patients still persist into school age.
· The potential factors affecting the natural course of food allergy are age at diagnosis, symptom severity, sensitization status and its change rate, and external factors such as diet and interventions.
· There is a considerable possibility of food allergy outgrow if specific IgE levels are 2–5 kUA/L or less, but other factors such as age and recent symptoms should be considered together.
· With a clear understanding of the natural course of food allergy, pediatricians can provide appropriate assessment and interventions to our patients, and consequently can help patients overcome their food allergy and improve the social safety net.
Letter to the Editor
Allergy
Increased serum eosinophilic cationic protein in children with nonspecific chronic cough
Young Hwan Kim, Yoon Young Jang, Jieun Jeong, Hai Lee Chung
Clin Exp Pediatr. 2023;66(10):455-457.   Published online September 14, 2023
Original Article
Allergy
Association between dyslipidemia and asthma in children: a systematic review and multicenter cohort study using a common data model
Ji Eun Lim, Hye Min Kim, Ju Hee Kim, Hey Sung Baek, Man Yong Han
Clin Exp Pediatr. 2023;66(8):357-365.   Published online June 14, 2023
Question: Is dyslipidemia a risk factor for asthma in children?
Finding: This was a comprehensive systematic review and retrospective multicenter study of the association between dyslipidemia and asthma in children. In a multicenter cohort analysis using the Observational Medical Outcomes Partnership Common Data Model, elevated total cholesterol levels were associated with increased risk of asthma development.
Meaning: These findings suggest an association between dyslipidemia and asthma in children.
Review Article
Allergy
Trends of vitamin D in asthma in the pediatric population for two decades: a systematic review
Myongsoon Sung
Clin Exp Pediatr. 2023;66(8):339-347.   Published online June 14, 2023
· Vitamin D may affect asthma via multiple mechanisms, including lung and optimal immune system functions.
· Many clinical trials have demonstrated the beneficial effects of vitamin D on asthma onset and aggravation. However, definitive clinical trials are lacking, and reports have detailed contradictory effects of vitamin D in children with asthma.
· Some exciting reports stated that obesity and vitamin D deficiency are associated with increased asthma symptoms in the pediatric population.
Recent topics on gastrointestinal allergic disorders
Yoshiyuki Yamada
Clin Exp Pediatr. 2023;66(6):240-249.   Published online January 9, 2023
Gastrointestinal (GI) allergies are divided into immunoglobulin E (IgE)-mediated, non-IgE-mediated, and mixed types. In addition to non-IgE-mediated, overlapping eosinophilic GI disorders (EGIDs) have increased in Japan. EGIDs, a mixed-type allergy category, include eosinophilic esophagitis (EoE) and non-EoE EGIDs. The number of EoE cases has increased in Western countries, followed by Asian countries. Recent GI allergies may also be associated with type 2 inflammation.
New approaches to immunotherapy in house dust mite allergy
In Sik Kim
Clin Exp Pediatr. 2023;66(4):161-168.   Published online October 25, 2022
Allergen immunotherapy (AIT) has developed over the last few decades and has emerged as a promising treatment. House dust mite (HDM) is a target allergen in AIT, and various modified HDM allergens have been improved for their efficacy. Moreover, clinical trials have proved their significantly therapeutic effects in allergy. This article review focuses on HDM allergens developed for AIT efficacy,...
Editorial
Allergy
Clinical considerations and practical issues of allergic diseases in COVID-19 era
Sungsu Jung
Clin Exp Pediatr. 2022;65(12):587-588.   Published online November 29, 2022
The risk of sudden acute respiratory syndrome coronavirus 2 infection and severe coronavirus disease 2019 (COVID-19) outcomes is not elevated in patients with the type 2 phenotype and well-controlled asthma. Inhaled corticosteroids, intranasal corticosteroids, and topical steroids can be safely used in COVID-19 patients. Biologics can be safely used by patients with allergic diseases without concern about antibody responses.
Review Article
Allergy
Diagnosis and management of asthma in infants and preschoolers
Hai Lee Chung
Clin Exp Pediatr. 2022;65(12):574-584.   Published online April 19, 2022
· Asthma in infants and preschoolers involves heterogeneous phenotypes.
· Asthma diagnosis is based on symptom patterns, therapeutic responses, and the presence of risk factors with careful consideration of differential diagnosis.
· Daily inhaled corticosteroid therapy remains the most effective strategy for managing persistent asthma symptoms irrespective of phenotype.
· Future research, including genetic and molecular studies, is needed to develop a clear definition of asthma and personalized therapeutic approaches.
Management of patients with allergic diseases in the era of COVID-19
Eun Lee
Clin Exp Pediatr. 2022;65(11):529-535.   Published online September 23, 2022
In the early days of the coronavirus disease 2019 (COVID-19) pandemic, allergic diseases, especially asthma, were considered to be risk factors for severe COVID-19 infection, hospitalization, and death. These concerns stemmed from the idea that individuals with allergic diseases are generally more susceptible to respiratory virus infections, which are major causes of exacerbation of allergic diseases. However, epidemiologic data with...
Editorial
Allergy
Dietary restriction misconceptions and food allergy education in children with atopic dermatitis
You Hoon Jeon
Clin Exp Pediatr. 2022;65(2):83-84.   Published online January 27, 2022
∙ Food intake strategies for preventing food allergies have undergone major changes over the past 20 years.
∙ In children with atopic dermatitis, indiscriminate food restrictions without diagnostic testing leads to nutritional imbalance and poor growth.
∙ When determining food restrictions for pediatric patients with atopic dermatitis, an accurate food allergy diagnosis must be preceded, and continuous parental education about food intake is required.
Letter to the Editor
Allergy
Environmental and dietary factors to be checked for treatment of atopic dermatitis in rural children
Sanghwa Youm, Eunjoo Lee, Jeongmin Lee
Clin Exp Pediatr. 2021;64(12):661-663.   Published online October 1, 2021
Question: What are the distinctive features of rural children with atopic dermatitis?
Finding: Birch and dog dander were the second most sensitized aeroallergens (32.6%), followed by house dust mites. Doctors and guardians reported food allergy comorbidities differently (19.9% and 43.5%, respectively). Dietary restrictions without medical evaluation were observed in 39.7% of patients.
Meaning: Effects of pollen distribution and indirect animal exposure should be evaluated. Evidence-based dietary restrictions must be implemented.
Original Article
Allergy
Cohort profile: National Investigation of Birth Cohort in Korea study 2008 (NICKs-2008)
Ju Hee Kim, Jung Eun Lee, So Min Shim, Eun Kyo Ha, Dong Keon Yon, Ok Hyang Kim, Ji Hyeon Baek, Hyun Yong Koh, Kyu Young Chae, Seung Won Lee, Man Yong Han
Clin Exp Pediatr. 2021;64(9):480-488.   Published online January 5, 2021
This national cohort study included all Korean children born in 2008 and 2009 observed over a period of more than 10 years. Our findings demonstrate that it is possible to analyze disease onset prior to hospitalization based on information such as lifestyle, eating habits, and risk factors by integrating National Health Insurance System data with national health screening data.
Influence of age at complementary food introduction on the development of asthma and atopic dermatitis in Korean children aged 1–3 years
Jihyun Lee, Meeyong Shin, Bora Lee
Clin Exp Pediatr. 2021;64(8):408-414.   Published online November 1, 2020
Question: Is age at the time of complementary food introduction associated with asthma and atopic dermatitis (AD) in early childhood?
Finding: We found no significant association between age at the time of complementary food introduction and the incidence of AD and asthma in Koreans aged 1–3 years.
Meaning: Our findings suggest that the influence of individual allergenic foods on the development of AD and asthma should be clarified.
Review Article
Allergy
Food allergies and food-induced anaphylaxis: role of cofactors
Meeyong shin
Clin Exp Pediatr. 2021;64(8):393-399.   Published online November 12, 2020
Question: What are the roles of cofactors in food allergies and food-induced anaphylaxis?
Finding: Cofactors reportedly play a role in approximately 14%–30% of anaphylactic reactions. Cofactors such as exercise, infection, nonsteroidal anti-inflammatory drugs, dehydration, and alcohol can increase intestinal permeability and antigen uptake, thereby causing allergic symptoms.
Meaning: Routine assessment of the possible involvement of cofactors is essential for the management of patients with food-induced anaphylaxis.
Prevalence, comorbidities, diagnosis, and treatment of nonallergic rhinitis: real-world comparison with allergic rhinitis
Hye Yung Yum, Eun Kyo Ha, Yoon Ho Shin, Man Yong Han
Clin Exp Pediatr. 2021;64(8):373-383.   Published online August 10, 2020
Rhinitis is among the most common respiratory diseases in children. Nonallergic rhinitis, which involves nasal symptoms without evidence of systemic allergic inflammation or infection, is a heterogeneous entity with diverse manifestations and intensities. Nonallergic rhinitis accounts for 16%–89% of the chronic rhinitis cases, affecting 1%–50% (median 10%) of the total pediatric population. The clinical course of nonallergic rhinitis is generally...
Original Article
Allergy
Sex-based differences in factors associated with bronchial hyperresponsiveness in adolescents with childhood asthma
Young Hwan Kim, Yoon Young Jang, Jieun Jeong, Hai Lee Chung
Clin Exp Pediatr. 2021;64(5):229-238.   Published online January 14, 2021
Question: What factors are associated with bronchial hyperresponsiveness (BHR) in adolescents with childhood asthma?
Finding: Age, mold sensitization, and increased eosinophil count were associated with BHR in boys versus a reduced forced expiratory volume in 1 second/forced vital capacity ratio in girls. Early mold sensitization was a risk factor for persistent BHR in boys only.
Meaning: Sex-specific differences were observed in the factors associated with BHR in adolescents.
Editorial
Allergy
Targeting eosinophils: another strategy for asthma treatment
Hye Mi Jee
Clin Exp Pediatr. 2021;64(5):223-224.   Published online March 5, 2021
Identifying phenotypes and endotypes of asthma patients is challenging, and eosinophilic phenotypes are generally characterized by severe or refractory asthma.
Biologicals targeting eosinophils are promising for the control of severe or refractory asthma symptoms.
To ensure proper treatment, increased understanding of the diverse phenotypes of high Th2 inflammation in pediatric asthma is needed.
Review Article
Allergy
Eosinophils and childhood asthma
Bong Seok Choi
Clin Exp Pediatr. 2021;64(2):60-67.   Published online January 6, 2021
•In allergic eosinophilic asthma, eosinophils act as important effector cells and antigen-presenting cells, while in nonallergic eosinophilic asthma, type 2 innate lymphoid cells play an important role in eosinophil activation.
•Sputum eosinophil counts can be helpful for evaluating allergic airway inflammation in asthma.
• Anti-interleukin-5 has broadened the scope of asthma treatment.
Editorial
Allergy
Insights into pediatric pollen food allergy syndrome
Jeong Hee Kim
Clin Exp Pediatr. 2020;63(12):483-484.   Published online June 1, 2020
Review Article
Allergy
Pollen-food allergy syndrome in children
You Hoon Jeon
Clin Exp Pediatr. 2020;63(12):463-468.   Published online May 14, 2020
The prevalence of pollen-food allergy syndrome (PFAS) in Korean children with pollen allergy was recently reported to be 42.7%. PFAS can cause a wide range of symptoms from mild allergy to severe anaphylaxis depending on the nature of food allergens that share the epitopes with pollen. Cases of anaphylaxis caused by PFAS have recently increased. Treatments for PFAS should be individualized for patients according to the severity of symptoms.
Clinical Note
Allergy
Recurrent urticaria caused by specific cat serum albumin IgE cross-reacting with pork serum albumin
Cheon Kim, Sung Won Kim, Yoon Ha Hwang
Clin Exp Pediatr. 2020;63(11):451-453.   Published online April 6, 2020
Question: What should be considered in children who complain of pork allergies?
Finding: History of raising a cat, the onset of symptoms after the ingestion of pork and specific IgE tests to pork, cat, milk, and Alpha-gal are needed.
Meaning: Pork cat syndrome could be the cause of pork allergies.
Editorial
Allergy
Should we prescribe montelukast to allergic pediatric patients?
Yong Mean Park
Clin Exp Pediatr. 2020;63(10):389-390.   Published online August 24, 2020
Review Article
Allergy
Montelukast use over the past 20 years: monitoring of its effects and safety issues
Yong Ju Lee, Chang-Keun Kim
Clin Exp Pediatr. 2020;63(10):376-381.   Published online February 5, 2020
Although the efficacy of montelukast is inferior to that of ICS, both physicians and parents prefer montelukast to ICSs.
EDN may be a useful biomarker for the treatment and monitoring of preschool children with asthma.
The US FDA requires boxed warning about serious neuropsychiatric events of montelukast, therefore, physicians should consider the benefits and risks of montelukast before prescribing it.
Original Article
Allergy
Ten-year trends and prevalence of asthma, allergic rhinitis, and atopic dermatitis among the Korean population, 2008–2017
Jihyun Ha, Seung Won Lee, Dong Keon Yon
Clin Exp Pediatr. 2020;63(7):278-283.   Published online January 29, 2020
Background: Major questions remain regarding the agestratified trends of allergic diseases and asthma in Korea.
Purpose: To identify the estimated recent prevalence and 10- year trends in asthma, allergic rhinitis, and atopic dermatitis among the Korean population from 2008 to 2017. Methods: This nationwide cross-sectional survey (Korean National Health and Nutrition Examination Survey) over 10 years (2008–2017) examined representative samples of the...
Editorial
Allergy
Trends in prevalence of allergic diseases in Korean children: how and why?
Kyung Suk Lee
Clin Exp Pediatr. 2020;63(7):263-264.   Published online April 13, 2020
Are you sure that it is a drug allergy?
Eun Hee Chung
Clin Exp Pediatr. 2020;63(6):213-214.   Published online June 1, 2020
Review Article
Allergy
Drug Allergy in Children: What Should We Know?
Ji Soo Park, Dong In Suh
Clin Exp Pediatr. 2020;63(6):203-210.   Published online November 12, 2019
The drug allergy “label” may have a lifetime of consequences for a child. Many children with alleged drug allergies are proven to be tolerant to the culprit medication when challenged. The field of drug hypersensitivity is a recently evolving field of research, but studies on its epidemiology and diagnostic tools are lacking in children. Clinical history is significant in the...
Original Article
Allergy
Asthma predictive index as a useful diagnostic tool in preschool children: a cross-sectional study in Korea
Dong Hyeon Lee, Ji-Won Kwon, Hyung Young Kim, Ju-Hee Seo, Hyo-Bin Kim, So-Yeon Lee, Gwang-Cheon Jang, Dae-Jin Song, Woo Kyung Kim, Young-Ho Jung, Soo-Jong Hong, Jung Yeon Shim
Clin Exp Pediatr. 2020;63(3):104-109.   Published online November 8, 2019
Question: Is physician-diagnosed current asthma in preschool children associated with the asthma predictive index, atopic sensitization, or pulmonary function test?
Finding: Physician-diagnosed current asthma in preschool children was associated with the asthma predictive index, but not with spirometry, methacholine provocation test, fractional expiratory nitric oxide level, and atopic sensitization.
Meaning: Physician-diagnosed asthma in preschool children may be different from classic atopic asthma in school children or adolescents.
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