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Yamamoto-Hanada K, Ohya Y. Overviewing allergy epidemiology in Japan - Findings from birth cohorts (JECS and T-Child study). Allergol Int 2024; 73:20-30. [PMID: 38044191 DOI: 10.1016/j.alit.2023.11.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2023] [Accepted: 11/10/2023] [Indexed: 12/05/2023] Open
Abstract
The escalating global allergy epidemic has emerged as a pressing and persistent challenge, exerting a profound impact on human health systems across centuries. This burgeoning predicament can be attributed to contemporary lifestyles, environmental influences, and genetic predispositions. The manifestation of allergy-related factors exhibits dynamic fluctuations contingent on temporal shifts, geographical distinctions, cultural variances, and diverse demographic strata. In this review, we present recent epidemiological insights derived from two distinct birth cohorts: the Japan Environment and Children's Study (JECS), encompassing the entirety of Japan, and the Tokyo Children's Health, Illness, and Development Study (T-Child Study) within Tokyo. Through this comprehensive review, we offer a comprehensive overview of the latest epidemiological discoveries stemming from these pivotal Japanese birth cohorts, thereby affording a unique opportunity to deliberate on imperative strategies for the optimal management of the allergy epidemic.
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Affiliation(s)
- Kiwako Yamamoto-Hanada
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan; Medical Suport Center for Japan Environment and Children's Study, National Center for Child Health and Development, Tokyo, Japan.
| | - Yukihiro Ohya
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan; Medical Suport Center for Japan Environment and Children's Study, National Center for Child Health and Development, Tokyo, Japan
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Miyaji Y, Yamamoto-Hanada K, Yang L, Saito-Abe M, Sato M, Mezawa H, Nishizato M, Ochiai M, Ohga S, Oda M, Mitsubuchi H, Shimono M, Suga R, Mise N, Sekiyama M, Nakayama SF, Ohya Y. Sex steroid hormones and allergic diseases in children: a pilot birth cohort study in the Japan Environment and Children's Study cohort. BMC Pediatr 2023; 23:479. [PMID: 37735641 PMCID: PMC10512488 DOI: 10.1186/s12887-023-04302-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2022] [Accepted: 09/09/2023] [Indexed: 09/23/2023] Open
Abstract
BACKGROUND Numerous studies suggest that sex steroids might play a role in sex disparity observed in allergic diseases in adults. However, whether sex hormones influence allergic diseases in children remains unclear. The aim of the present study was to examine the association of sex steroid hormones with allergic disease in Japanese children. METHODS The present cross-sectional study included 145 6-year-old children participating in a pilot birth cohort study in the Japan Environment and Children's Study. Data on allergic diseases were obtained from questionnaires, and serum levels of sex steroid hormones and allergen-specific IgE were measured. Logistic regression was performed to evaluate the association of sex hormones with allergic diseases. RESULTS After adjusted sex, amount of body fat at 6 years, parental history of allergic disease, and exposure to tobacco smoke, serum dehydroepiandrosterone sulfate level was significantly associated with reduced odds of any allergic disease (adjusted odds ratio, 0.58; 95% confidence interval, 0.36-0.93; P = 0.024) and serum follicle-stimulating hormone level was significantly associated with increased odds of any allergic disease (adjusted odds ratio, 2.04; 95% confidence interval, 1.01-4.11, P = 0.046). Dehydroepiandrosterone sulfate level showed a significant association with number of allergic diseases. CONCLUSIONS The current study findings suggest that sex hormones may play an important role in the development of allergic diseases in prepubertal children.
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Affiliation(s)
- Yumiko Miyaji
- Allergy Center, National Center for Child Health and Development, 2-10-1 Okura, Setagaya-Ku, Tokyo, 157-8535, Japan
- Medical Support Center for the Japan Environment and Children's Study, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-Ku, Tokyo, 157-8535, Japan
| | - Kiwako Yamamoto-Hanada
- Allergy Center, National Center for Child Health and Development, 2-10-1 Okura, Setagaya-Ku, Tokyo, 157-8535, Japan.
- Medical Support Center for the Japan Environment and Children's Study, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-Ku, Tokyo, 157-8535, Japan.
| | - Limin Yang
- Medical Support Center for the Japan Environment and Children's Study, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-Ku, Tokyo, 157-8535, Japan
| | - Mayako Saito-Abe
- Allergy Center, National Center for Child Health and Development, 2-10-1 Okura, Setagaya-Ku, Tokyo, 157-8535, Japan
- Medical Support Center for the Japan Environment and Children's Study, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-Ku, Tokyo, 157-8535, Japan
| | - Miori Sato
- Allergy Center, National Center for Child Health and Development, 2-10-1 Okura, Setagaya-Ku, Tokyo, 157-8535, Japan
- Medical Support Center for the Japan Environment and Children's Study, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-Ku, Tokyo, 157-8535, Japan
| | - Hidetoshi Mezawa
- Medical Support Center for the Japan Environment and Children's Study, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-Ku, Tokyo, 157-8535, Japan
| | - Minaho Nishizato
- Medical Support Center for the Japan Environment and Children's Study, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-Ku, Tokyo, 157-8535, Japan
| | - Masayuki Ochiai
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Shouichi Ohga
- Department of Pediatrics, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan
- Research Center for Environment and Developmental Medical Sciences, Kyushu University, Fukuoka, Japan
| | - Masako Oda
- The South Kyushu Okinawa Unit Center, Faculty of Life Sciences, Kumamoto University, Kumamoto, Japan
| | - Hiroshi Mitsubuchi
- Department of Neonatology, Kumamoto University Hospital, Kumamoto, Japan
| | - Masayuki Shimono
- Regional Center for Pilot Study of Japan Environment and Children's Study, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Reiko Suga
- Regional Center for Pilot Study of Japan Environment and Children's Study, University of Occupational and Environmental Health, Fukuoka, Japan
| | - Nathan Mise
- Department of Environmental and Preventive Medicine, Jichi Medical University, Tochigi, Japan
| | - Makiko Sekiyama
- Japan Environment and Children's Study Programme Office, National Institute for Environmental Studies, Ibaraki, Japan
| | - Shoji F Nakayama
- Japan Environment and Children's Study Programme Office, National Institute for Environmental Studies, Ibaraki, Japan
| | - Yukihiro Ohya
- Allergy Center, National Center for Child Health and Development, 2-10-1 Okura, Setagaya-Ku, Tokyo, 157-8535, Japan
- Medical Support Center for the Japan Environment and Children's Study, National Research Institute for Child Health and Development, 2-10-1 Okura, Setagaya-Ku, Tokyo, 157-8535, Japan
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Relationship between Food Allergy and Endotoxin Concentration and the Toleration Status at 2 Years: The Japan Environment and Children's Study. Nutrients 2023; 15:nu15040968. [PMID: 36839328 PMCID: PMC9959381 DOI: 10.3390/nu15040968] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2023] [Revised: 02/06/2023] [Accepted: 02/13/2023] [Indexed: 02/17/2023] Open
Abstract
Changes in household endotoxin concentration may affect the prognosis of food allergy (FA), but data on the association between household endotoxin concentration and an already-developed FA are scarce. Thus, we investigated the association between environmental endotoxin exposure and tolerance to hen's egg (HE) and cow's milk (CM) using data from children participating in the Japan Environment and Children's Study who had HE allergies (n = 204) and CM allergy (n = 72) in their first year of life. We grouped the endotoxin results into quartiles 1-4 (Q1-Q4). In children with HE allergy and with CM allergy, there was no significant difference in the prevalence of tolerance to HE and CM at 2 years old when comparing endotoxin levels of the children in Q1 with those in Q2, Q3, and Q4, respectively. However, subgroup analyses by the presence of eczema and causal foods revealed that children in Q1 had a lower prevalence of tolerance to foods in some subgroup analyses and lower causal allergen-specific immunoglobulin G4 levels. Although an individually based approach against endotoxin according to background characteristics, such as eczema and causal foods, is necessary, preventing excessive endotoxin removal might contribute to FA resolution in some children.
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Eczema phenotypes and IgE component sensitization in adolescents: A population-based birth cohort. Allergol Int 2023; 72:107-115. [PMID: 35781407 DOI: 10.1016/j.alit.2022.05.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 05/14/2022] [Accepted: 05/22/2022] [Indexed: 01/25/2023] Open
Abstract
BACKGROUND Eczema patients are commonly immunoglobulin (Ig)E polysensitized. Although atopic dermatitis (AD) phenotypes have been recognized, IgE sensitization patterns based on AD phenotypes have not been well illustrated. We aimed to investigate how eczema phenotypes impact IgE component sensitization patterns. METHODS This birth cohort study investigated a general population in the Tokyo Children's Health, Illness, and Development Study (T-Child Study) until children reached the age of 13 years. Eczema was assessed using the International Study of Asthma and Allergies in Childhood (ISAAC) questionnaire. Allergen component specific IgE antibody titers were measured using a multiplex array ImmunoCAP ISAC. RESULTS Persistent eczema phenotype until adolescence was strongly associated with allergic march symptoms, such as wheezing and hay fever, and oral allergy symptoms, and IgE component sensitizations of airborne (Japanese cedar, house dust mite, Timothy, cat, and dog) and cross-reactive allergens (Bet v 1 family) compared to early-remission and late-onset eczema. On the other hand, late-onset eczema did not show any strong associations with allergic symptoms and IgE sensitization. Adolescents with persistent eczema have high comorbidity of symptoms of pollen-food allergy syndrome. CONCLUSIONS Early-onset eczema is deeply connected with the later allergic march, and late-onset eczema differs from the phenotype of allergic march. Early-onset eczema characterizing IgE sensitization was likely to be an extrinsic type, and late-onset eczema, which was not related to IgE sensitization, was likely an intrinsic type. Pollen-Food Allergy Syndrome is one of the allergic features in allergic march.
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Irahara M, Yamamoto-Hanada K, Sato M, Saito-Abe M, Miyaji Y, Yang L, Nishizato M, Kumasaka N, Mezawa H, Ohya Y. Endotoxin concentration and persistent eczema in early childhood. J Dermatol 2022; 50:646-655. [PMID: 36578125 DOI: 10.1111/1346-8138.16686] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Revised: 11/16/2022] [Accepted: 12/05/2022] [Indexed: 12/30/2022]
Abstract
Although endotoxin concentration in the environment is negatively associated with atopic dermatitis (AD) onset in early childhood, the association between endotoxin concentration in the environment and eczema resolution in children with preexisting eczema is unclear. The aim of this study was to evaluate the association between endotoxin concentration in house dust and eczema persistence in young children. The authors used data from children participating in JECS (Japan Environment and Children's Study). In children who had AD or AD-like lesions at the age of 1 year, the authors investigated the association between the prevalence of eczema at the age of 3 years and endotoxin concentration (categorized by quartiles) in the dust on children's mattresses at the ages of 1.5 and 3 years. This study included 605 children. Eczema was significantly less prevalent among children whose mattresses were in the second and third quartiles of endotoxin concentration when they were 18 months old than among children whose mattresses were in the first quartile (adjusted odds ratio, 0.57 [95% confidence interval, 0.35-0.93] and adjusted odds ratio, 0.49 [95% confidence interval, 0.29-0.83], respectively). Moreover, of the children with eczema at age 3 years, those whose mattresses had endotoxin concentrations in the first quartile had significantly worse sleep disturbance caused by itchy rash (>1 time per week) than did those whose mattresses were in the third and fourth quartiles (20.0% vs 3.3% and 3.7%, both p values < 0.01). The findings indicate that low endotoxin exposure is associated with a higher prevalence of persistent eczema during early childhood.
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Affiliation(s)
- Makoto Irahara
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan.,Medical Support Center for the Japan Environment and Children's Study, National Center for Child Health and Development, Tokyo, Japan
| | - Kiwako Yamamoto-Hanada
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan.,Medical Support Center for the Japan Environment and Children's Study, National Center for Child Health and Development, Tokyo, Japan
| | - Miori Sato
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan.,Medical Support Center for the Japan Environment and Children's Study, National Center for Child Health and Development, Tokyo, Japan
| | - Mayako Saito-Abe
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan.,Medical Support Center for the Japan Environment and Children's Study, National Center for Child Health and Development, Tokyo, Japan
| | - Yumiko Miyaji
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan.,Medical Support Center for the Japan Environment and Children's Study, National Center for Child Health and Development, Tokyo, Japan
| | - Limin Yang
- Medical Support Center for the Japan Environment and Children's Study, National Center for Child Health and Development, Tokyo, Japan
| | - Minaho Nishizato
- Medical Support Center for the Japan Environment and Children's Study, National Center for Child Health and Development, Tokyo, Japan
| | - Natsuhiko Kumasaka
- Medical Support Center for the Japan Environment and Children's Study, National Center for Child Health and Development, Tokyo, Japan
| | - Hidetohi Mezawa
- Medical Support Center for the Japan Environment and Children's Study, National Center for Child Health and Development, Tokyo, Japan
| | - Yukihiro Ohya
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan.,Medical Support Center for the Japan Environment and Children's Study, National Center for Child Health and Development, Tokyo, Japan
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