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Toyokuni K, Yamamoto-Hanada K, Yang L, Hagino K, Harama D, Omori M, Matsumoto Y, Suzuki D, Umezawa K, Takada K, Shimada M, Hirai S, Ishikawa F, Hamaguchi S, Saito-Abe M, Sato M, Miyaji Y, Kabashima S, Fukuie T, Noguchi E, Suzuki K, Ohya Y. Influence of household pet ownership and filaggrin loss-of-function mutations on eczema prevalence in children: A birth cohort study. Allergol Int 2024:S1323-8930(24)00004-2. [PMID: 38302328 DOI: 10.1016/j.alit.2024.01.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2023] [Revised: 12/05/2023] [Accepted: 01/04/2024] [Indexed: 02/03/2024] Open
Abstract
BACKGROUND The association between pet exposure in infancy, early childhood eczema, and FLG mutations remains unclear. METHODS This was a birth cohort study performed in Tokyo, Japan. The primary outcome was current eczema based on questionnaire responses collected repeatedly from birth to 5 years of age. Generalized estimating equations and generalized linear modeling were used to evaluate the association. RESULTS Data from 1448 participants were used for analyses. Household dog ownership during gestation, early infancy, and 18 months of age significantly reduced the risk of current eczema. Household cat ownership also reduced the risk of current eczema, albeit without statistical significance. The combined evaluation of children from households with pets, be it cats, dogs or both, the risk of current eczema at 1-5 years of age was lower in those with household pet exposure ownership during gestation (RR = 0.59, 95 % CI 0.45-0.77) and at 6 months (RR = 0.49, 95 % CI 0.36-0.68). , Reduced risks of eczema were also observed at 2-5 (RR = 0.52, 95 % CI 0.37-0.73) and 3-5 years of age (RR = 0.50 95 % CI 0.35-0.74) when the respective household pet ownership were evaluated at 18 months and 3 years of age. These protective associations of reduced risk of eczema were only observed in children without FLG mutations. CONCLUSIONS Household dog and pet (dog, cat, or both) ownership was protective against early childhood eczema in a birth cohort dataset. This protective association was observed only in children without FLG mutations, which should be confirmed in studies with larger cohorts.
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Affiliation(s)
- Kenji Toyokuni
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan; Department of Health and Psychosocial Medicine, Aichi Medical University School of Medicine, Aichi, Japan
| | | | - Limin Yang
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Kouhei Hagino
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Daisuke Harama
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Marei Omori
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Yasuaki Matsumoto
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Daichi Suzuki
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Kotaro Umezawa
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Kazuma Takada
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Mami Shimada
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Seiko Hirai
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Fumi Ishikawa
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan; Department of Health and Psychosocial Medicine, Aichi Medical University School of Medicine, Aichi, Japan
| | - Sayaka Hamaguchi
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Mayako Saito-Abe
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Miori Sato
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan; Department of Health and Psychosocial Medicine, Aichi Medical University School of Medicine, Aichi, Japan
| | - Yumiko Miyaji
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Shigenori Kabashima
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Tatsuki Fukuie
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Emiko Noguchi
- Department of Medical Genetics, Faculty of Medicine, University of Tsukuba, Ibaraki, Japan
| | - Kohta Suzuki
- Department of Health and Psychosocial Medicine, Aichi Medical University School of Medicine, Aichi, Japan
| | - Yukihiro Ohya
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
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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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Yi J, Shin HS, Han MY, Choi HJ, Lee MS, Sung M. Associations Between Phthalate, Eosinophil, and Aeroallergen Sensitization in Schoolchildren. J Korean Med Sci 2023; 38:e391. [PMID: 37987110 PMCID: PMC10659924 DOI: 10.3346/jkms.2023.38.e391] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 08/17/2023] [Indexed: 11/22/2023] Open
Abstract
BACKGROUND Phthalates and bisphenol A (BPA) are endocrine-disrupting chemicals and may cause immunological disorders in children. Therefore, according to the region, we investigated urinary phthalates and BPA levels and the relationship between urinary phthalate, aeroallergen sensitization, and eosinophil count during the coronavirus disease 2019 pandemic. METHODS In total, 203 schoolchildren (134 residential and 69 industrial) aged 7-10 years were enrolled between July 2021 and July 2022. The BPA, metabolites of four high-molecular-weight phthalates (Σ4HMWP) and three low-molecular-weight phthalates (Σ3LMWP), were measured in the urine samples. Total eosinophil count and transepidermal water loss (TEWL) were also measured along with the skin prick test. RESULTS The two groups had no differences in terms of BPA. The industrial group had significantly more plastic container usage, and there was a difference in the Σ3LMWP (P < 0.001) between the two groups but no difference in the Σ4HMWP (P = 0.234). The quartiles of urinary Σ4HMWP and Σ3LMWP (P < were not associated with the total eosinophil count, vitamin D level, or TEWL. After adjusting for cofactors, the quartiles of urinary Σ4HMWP and Σ3LMWP were significantly associated with total eosinophil count (P < 0.001) but not with aeroallergen sensitization or vitamin D. CONCLUSION Exposure to phthalates was significantly associated with eosinophil count but not with aeroallergen sensitization or vitamin D. Therefore, reducing the use of plastic containers may effectively prevent exposure to phthalates and reduce Th2 cell-mediated inflammation in children.
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Affiliation(s)
- Jeongsik Yi
- Department of Emergency Medicine, Gumi CHA Medical Center, CHA University, Gumi, Korea
| | - Ho-Sang Shin
- Department of Environmental Education, Kongju National University, Gongju, Korea
| | - Man Yong Han
- Department of Pediatrics, CHA Bundang Medical Center, CHA University School of Medicine, Seongnam, Korea
| | - Hee Jin Choi
- Department of Biostatistics, Soonchunhyang University Gumi Hospital, Gumi, Korea
| | - Mi Seon Lee
- Department of Pediatrics, Soonchunhyang University Gumi Hospital, Gumi, Korea
| | - Myongsoon Sung
- Department of Pediatrics, Soonchunhyang University Gumi Hospital, Gumi, Korea.
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Miyaji Y, Yamamoto-Hanada K, Fukuie T, Narita M, Ohya Y. Risk factors of admission in school children with severe atopic dermatitis. J Dermatol 2023; 50:72-81. [PMID: 36258264 DOI: 10.1111/1346-8138.16612] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Revised: 09/06/2022] [Accepted: 09/28/2022] [Indexed: 01/04/2023]
Abstract
There are no data about risk factor of admission and long-term (>1 year) prognosis of proactive therapy using topical corticosteroids (TCSs) in school children. This study aims to identify the prognosis of school children over 3 years treated with proactive therapy after hospitalization due to atopic dermatitis (AD). This retrospective cohort study used electronic medical record data of schoolchildren (aged 5-19 years) with a long-term admission program for AD at the National Center for Child Health and Development from January 2008 to December 2013. Long-term prognosis at 1 and 3 years after discharge were retrospectively identified from their medical records. The most common exacerbation factor was poor adherence (51.8%). At 1 and 3 years after hospitalization, 87.3% and 74.3%, respectively, of the children used TCSs on their trunk and limbs less than twice a week. Investigator's Global Assessment of AD scores were ≤1 for 81.0%and 75.7% at 1 and 3 years after discharge, respectively. AD was well-controlled during follow-up. Rehospitalization due to AD was observed in 11.8% children. Poor adherence was biggest risk factor for admission. Children with severe AD could achieve well-controlled AD with a long-term admission AD program and home-based proactive therapy using TCSs for 3 years after discharge. Maintaining good adherence for AD treatment is required to prevent exacerbation and improve future prognosis in school children. However, we need to engage for the children who required rehospitalization.
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Affiliation(s)
- Yumiko Miyaji
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | | | - Tatsuki Fukuie
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Masami Narita
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
| | - Yukihiro Ohya
- Allergy Center, National Center for Child Health and Development, Tokyo, Japan
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