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Ye H, Yang X, Hanna F. The Impact of Prenatal Environmental Tobacco Smoking (ETS) and Exposure on Chinese Children: A Systematic Review. Children (Basel) 2023; 10:1354. [PMID: 37628353 PMCID: PMC10453662 DOI: 10.3390/children10081354] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/01/2023] [Revised: 07/28/2023] [Accepted: 08/04/2023] [Indexed: 08/27/2023]
Abstract
Background: There is considerable evidence to support the association between exposure to environmental tobacco smoke (ETS) and children's burden of disease. However, the literature on the health outcomes of prenatal ETS exposure among Chinese children has not yet been comprehensively reviewed. Objective: This systematic review examines the currently available evidence and identifies gaps for further research on the health consequences of prenatal ETS exposure on Chinese children. Methods: Following the JBI systematic-scoping review methodological framework, we conducted a computer-aided search of three electronic databases-PubMed, EBSCOhost, and ProQuest to include studies from January 2011 to May 2023 that addressed the health outcomes of Chinese children whose mothers were exposed to ETS at any stage of pregnancy. Furthermore, a methodological quality assessment of the selected articles was conducted using JBI critical appraisal checklists. Results: A total of 30 articles were reviewed, including eleven high-quality studies and nineteen moderate-quality studies. Five main themes, including hypertension, fetal and children's development, behavioural disorders, respiratory outcomes, and "other health outcomes", were encompassed. The majority of the studies showed a positive link between prenatal ETS exposure and an increased risk of preterm birth, and moderate risk of fetal growth restriction. A few studies explored other potential adverse outcomes of ETS, including hypertension, respiratory morbidity, lung function, and asthma in children. Conclusions: The currently available evidence on prenatal ETS exposure in Chinese children has unveiled a wide range of health outcomes, including preterm birth, fetal development, behavioural disorders, and much more. However, Chinese studies in this area are still lacking and a gap still exists in relation to the strength of association between prenatal ETS exposure and some health risks. Efficient anti-smoking policies and smoking cessation programs should be developed to promote maternal and child health. Further research is also needed to provide better evidence in this field.
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Affiliation(s)
| | | | - Fahad Hanna
- Public Health Program, Department of Health and Education, Torrens University Australia, Melbourne, VIC 3000, Australia; (H.Y.); (X.Y.)
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Li X, Jing R, Feng S, Zhang H, Zhang J, Li J, Cao W, Jiang M, Liu Y. Association between prenatal or postpartum exposure to
tobacco smoking and allergic rhinitis in the offspring:
An updated meta-analysis of nine cohort studies. Tob Induc Dis 2022; 20:37. [PMID: 35498955 PMCID: PMC8996217 DOI: 10.18332/tid/146905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 02/08/2022] [Accepted: 02/23/2022] [Indexed: 11/24/2022] Open
Affiliation(s)
- Xinrong Li
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Ran Jing
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Shenglan Feng
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Hui Zhang
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jianfeng Zhang
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Jiulin Li
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Wencan Cao
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Mingjun Jiang
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
| | - Yang Liu
- Hospital of Chengdu University of Traditional Chinese Medicine, Chengdu, China
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Mohamad Zainal NH, Mohd Nor NH, Saat A, Clifton VL. Childhood allergy susceptibility: The role of the immune system development in the in-utero period. Hum Immunol 2022; 83:437-446. [DOI: 10.1016/j.humimm.2022.02.002] [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] [Received: 08/09/2021] [Revised: 01/20/2022] [Accepted: 02/07/2022] [Indexed: 11/30/2022]
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Sunde RB, Thorsen J, Pedersen CET, Stokholm J, Bønnelykke K, Chawes B, Bisgaard H. Prenatal tobacco exposure and risk of asthma and allergy outcomes in childhood. Eur Respir J 2022; 59:2100453. [PMID: 34244319 DOI: 10.1183/13993003.00453-2021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2021] [Accepted: 06/21/2021] [Indexed: 11/05/2022]
Abstract
BACKGROUND Harmful effects of prenatal tobacco exposure and possible interaction with 17q12-21 genetic variants have been shown for some asthma outcomes in childhood, whereas findings related to allergy outcomes are more inconsistent. This study aimed to examine the effect of prenatal tobacco exposure and relation to 17q12-21 genotype on a wide array of asthma and allergy-related outcomes in early childhood. METHODS Prenatal tobacco exposure was determined by maternal smoking during the third trimester (yes/no) in 411 children from the phenotyped Copenhagen Prospective Studies on Asthma in Childhood 2000 (COPSAC2000) birth cohort with clinical follow-up to age 7 years. The rs7216389 single nucleotide polymorphism was used as main representative of the 17q12-21 locus. Asthma end-points included asthma diagnosis, exacerbations, episodes with troublesome lung symptoms and lower respiratory tract infections, spirometry, plethysmography, bronchial responsiveness to methacholine, exercise and cold dry air. Allergy-related endpoints included aeroallergen sensitisation, allergic rhinitis, fractional exhaled nitric oxide, blood eosinophil count and urine eosinophil protein X levels. Statistical analyses were done using Cox regression, linear regression, logistic regression and quasi-Poisson regression. RESULTS Prenatal tobacco exposure increased the risk of asthma (adjusted hazard ratio (aHR) 2.05, 95% CI 1.13-3.73; p=0.02), exacerbations (aHR 3.76, 95% CI 2.05-6.91; p<0.001), number of LRTIs (adjusted incidence rate ratio 1.87, 95% CI 1.34-2.55; p<0.001), and was associated with decreased spirometry indices (forced expiratory volume in 1 s (FEV1) adjusted mean difference (aMD) -0.07 L, 95% CI -0.13- -0.005 L, p=0.03; maximal mid-expiratory flow aMD -0.19 L·s-1, -0.34- -0.04 L·s-1, p=0.01) and increased bronchial responsiveness to methacholine (provocative dose of methacholine causing a 20% drop in FEV1 adjusted geometric mean ratio 0.55, 95% CI 0.31-0.96; p=0.04). In contrast, there was no association with any allergy-related end-points. The effect on asthma depended on 17q12-21 genotype with an increased risk only among children without risk alleles. CONCLUSION Prenatal tobacco exposure was associated with asthma dependent on 17q12-21 genotype and with exacerbations, lung function and bronchial responsiveness, but not with any allergy-related outcomes. This suggests that tobacco exposure in utero leads to adverse lung developmental/structural effects rather than susceptibility to develop allergy and type 2 inflammation.
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Affiliation(s)
- Rikke Bjersand Sunde
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
- Dept of Pediatrics, Slagelse Sygehus, Slagelse, Denmark
| | - Jonathan Thorsen
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Casper-Emil Tingskov Pedersen
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Jakob Stokholm
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
- Dept of Pediatrics, Slagelse Sygehus, Slagelse, Denmark
| | - Klaus Bønnelykke
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Bo Chawes
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
| | - Hans Bisgaard
- COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Copenhagen, Denmark
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Abstract
Background and objective An increasing trend of asthma prevalence was observed in Asia; however, contributions of environmental and host-related risk factors to the development of this disease remain uncertain. This study aimed to perform a systematic review and meta-analysis for asthma-associated risk factors reported in Asia. Methods We systematically searched three public databases (Web of Science, PubMed, and Scopus) in Feb 2021. We only included articles that reported environmental and host-related risk factors associated with asthma in the Asian population. Random-effect meta-analyses were conducted for frequently reported asthma-associated risk factors to provide an overall risk estimate of asthma development. Results Of 4030 records obtained from public databases, 289 articles were selected for review. The most frequently reported asthma-associated risk factor was the family history of allergy-related conditions. The random-effect asthma risk estimates (pooled odds ratio, OR) were 4.66 (95% confidence interval (CI): 3.73–5.82) for the family history of asthma, 3.50 (95% CI: 2.62–4.67) for the family history of atopy, 3.57 (95% CI: 3.03–4.22) for the family history of any allergic diseases, 1.96 (95% CI: 1.47–2.61) for the family history of allergic rhinitis, and 2.75 (95% CI: 1.12–6.76) for the family history of atopic dermatitis. For housing-related factors, including the presence of mold, mold spots, mold odor, cockroach, water damage, and incense burning, the random-effect pooled OR ranged from 1.43 to 1.73. Other risk factors with significant pooled OR for asthma development included male gender (1.30, 95% CI: 1.23–1.38), cigarette smoke exposure (1.44, 95% CI: 1.30–1.60), cigarette smoking (1.66, 95% CI: 1.44–1.90), body mass index (BMI)–related parameters (pooled OR ranged from 1.06 to 2.02), various types of air pollution (NO2, PM10, and O3; pooled OR ranged from 1.03 to 1.22), and pre- and perinatal factors (low birth weight, preterm birth, and cesarean section; pooled OR ranged from 1.14 to 1.32). Conclusions The family history of asthma was the most frequently reported risk factor for asthma development in Asia with the highest risk estimate for asthma development. This suggests a major role of the genetic component in asthma pathogenesis. Further study on asthma genetics is required to improve the current understanding of asthma etiology. Supplementary Information The online version contains supplementary material available at 10.1186/s40101-021-00273-x.
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Affiliation(s)
- Yang Yie Sio
- Allergy and Molecular Immunology Laboratory, Lee Hiok Kwee Functional Genomics Laboratories, Department of Biological Sciences, National University of Singapore, Block S2, Level 5, 14 Science Drive 4, off Lower Kent Ridge Road, 117543, Singapore, Singapore
| | - Fook Tim Chew
- Allergy and Molecular Immunology Laboratory, Lee Hiok Kwee Functional Genomics Laboratories, Department of Biological Sciences, National University of Singapore, Block S2, Level 5, 14 Science Drive 4, off Lower Kent Ridge Road, 117543, Singapore, Singapore.
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Zhou Y, Chen J, Dong Y, Shen J, Tian M, Yang Y, Song L, Li J. Maternal tobacco exposure during pregnancy and allergic rhinitis in offspring: A systematic review and meta-analysis. Medicine (Baltimore) 2021; 100:e26986. [PMID: 34449468 PMCID: PMC8389918 DOI: 10.1097/md.0000000000026986] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/13/2020] [Accepted: 07/26/2021] [Indexed: 01/04/2023] Open
Abstract
BACKGROUND Maternal tobacco exposure during pregnancy is known to cause a potential hazard to the offspring's health. So far, published studies have shown no consistent results with whether tobacco exposure in utero is causally linked to the development of allergic rhinitis in offspring. The aim of this study was to comprehensively evaluate the association between maternal tobacco exposure during pregnancy and allergic rhinitis in offspring by meta-analysis and to provide reference for clinical work. METHODS Literatures were searched in CNKI, Wanfang Data, VIP, SinoMed, PubMed, Web of science and Embase up to September 30,2020. Screening, inclusion, quality assessment, data extraction and data analysis of the literatures were conducted. Meta-analysis was performed with Revman 5.3 and State15.1 software. Odds ratio (OR) and 95%CI were used as observation indicators. RESULTS We had retrieved 16 articles with 22 independent datasets and 11,49,879 sample size. When all the studies were analyzed together, the results showed that maternal smoking exposure during pregnancy would increase the risk of allergic rhinitis in offspring (OR = 1.13, 95%CI:1.02-1.26), especially maternal passive smoking during pregnancy (OR = 1.39, 95%CI:1.05-1.84). But subgroup analysis showed that maternal active smoking during pregnancy was only significantly associated with offspring allergic rhinitis in cross-sectional studies (OR = 1.24, 95%CI:1.07-1.45) and study done in America study (OR = 1.22, 95%CI:1.05-1.42). CONCLUSIONS Tobacco exposure during pregnancy could increase the risk of allergic rhinitis in offspring. The importance of avoiding prenatal tobacco exposure should be emphasized more for the health of next generation in the public.
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Affiliation(s)
- Yaqian Zhou
- Key Laboratory of Model Animals and Stem Cell Biology in Hunan Province, School of Medicine, Hunan Normal University, Hunan, China
| | - JunRong Chen
- Key Laboratory of Model Animals and Stem Cell Biology in Hunan Province, School of Medicine, Hunan Normal University, Hunan, China
| | - Yunpeng Dong
- Department of Otolatyngoloty-Head and Neck Surgery, Yichang Central People's Hospital, the First College of Clinical Medical Science, Three Gorges University, Hubei, China
| | - Jinhua Shen
- Key Laboratory of Model Animals and Stem Cell Biology in Hunan Province, School of Medicine, Hunan Normal University, Hunan, China
| | - Mei Tian
- Key Laboratory of Model Animals and Stem Cell Biology in Hunan Province, School of Medicine, Hunan Normal University, Hunan, China
| | - Yide Yang
- Key Laboratory of Molecular Epidemiology of Hunan Province, School of Medicine, Hunan Normal University, Hunan, China
| | - Liujiang Song
- Gene Therapy Center, University of North Carolina at Chapel Hill, North Carolina, USA
| | - Jian Li
- Key Laboratory of Model Animals and Stem Cell Biology in Hunan Province, School of Medicine, Hunan Normal University, Hunan, China
- Key Laboratory of Study and Discovery of Small Targeted Molecules of Hunan Province, School of Medicine, Hunan Normal University, Hunan, China
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Tanaka K, Arakawa M, Miyake Y. Perinatal smoking exposure and risk of asthma in the first three years of life: A prospective prebirth cohort study. Allergol Immunopathol (Madr) 2020; 48:530-6. [PMID: 32439145 DOI: 10.1016/j.aller.2020.03.008] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 03/10/2020] [Accepted: 03/17/2020] [Indexed: 11/20/2022]
Abstract
BACKGROUND There is limited evidence on the association between prenatal smoking exposure and the risk of asthma in children. The aim of this prebirth cohort study was to investigate the association between prenatal and postnatal tobacco smoke exposure and the risk of asthma in Japanese children. METHODS Study subjects were 1304 mother-child pairs. Information on the variables under study was obtained using repeated questionnaires that were completed by mothers, first prior to delivery, then shortly after birth and subsequently around 4, 12, 24, and 36 months after delivery. Ever asthma was defined as a maternal report of physician-diagnosed asthma at any time since birth. Current asthma was defined as the use of asthma medication at the time of the sixth survey. RESULTS Logistic regression models revealed that maternal active smoking, either before pregnancy or during pregnancy, was not associated with the risk of ever asthma or current asthma. Further, no association was observed between postnatally living with at least one household smoker and the risk of asthma. Among children whose mothers are never smokers, maternal second-hand smoke (SHS) exposure at work and/or at home during pregnancy increased the risk of ever asthma and current asthma in children; adjusted odds ratio (95% confidence intervals) for ever asthma and current asthma were 2.41 (1.13-5.05) and 4.82 (1.68-13.43), respectively. CONCLUSIONS Our findings suggest that maternal SHS exposure during pregnancy might be associated with an increased risk of ever asthma and current asthma in young children whose mothers have never smoked.
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Granum B, Oftedal B, Agier L, Siroux V, Bird P, Casas M, Warembourg C, Wright J, Chatzi L, de Castro M, Donaire D, Grazuleviciene R, Småstuen Haug L, Maitre L, Robinson O, Tamayo-Uria I, Urquiza J, Nieuwenhuijsen M, Slama R, Thomsen C, Vrijheid M. Multiple environmental exposures in early-life and allergy-related outcomes in childhood. Environ Int 2020; 144:106038. [PMID: 32854059 PMCID: PMC8768577 DOI: 10.1016/j.envint.2020.106038] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Revised: 06/10/2020] [Accepted: 08/03/2020] [Indexed: 05/15/2023]
Abstract
INTRODUCTION Early onset and high prevalence of allergic diseases result in high individual and socio-economic burdens. Several studies provide evidence for possible effects of environmental factors on allergic diseases, but these are mainly single-exposure studies. The exposome provides a novel holistic approach by simultaneously studying a large set of exposures. The aim of the study was to evaluate the association between a broad range of prenatal and childhood environmental exposures and allergy-related outcomes in children. MATERIAL AND METHODS Analyses of associations between 90 prenatal and 107 childhood exposures and allergy-related outcomes (last 12 months: rhinitis and itchy rash; ever: doctor-diagnosed eczema and food allergy) in 6-11 years old children (n = 1270) from the European Human Early-Life Exposome cohort were performed. Initially, we used an exposome-wide association study (ExWAS) considering the exposures independently, followed by a deletion-substitution-addition selection (DSA) algorithm considering all exposures simultaneously. All the exposure variables selected in the DSA were included in a final multi-exposure model using binomial general linear model (GLM). RESULTS In ExWAS, no exposures were associated with the outcomes after correction for multiple comparison. In multi-exposure models for prenatal exposures, lower distance of residence to nearest road and higher di-iso-nonyl phthalate level were associated with increased risk of rhinitis, and particulate matter absorbance (PMabs) was associated with a decreased risk. Furthermore, traffic density on nearest road was associated with increased risk of itchy rash and diethyl phthalate with a reduced risk. DSA selected no associations of childhood exposures, or between prenatal exposures and eczema or food allergy. DISCUSSION This first comprehensive and systematic analysis of many environmental exposures suggests that prenatal exposure to traffic-related variables, PMabs and phthalates are associated with rhinitis and itchy rash.
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Affiliation(s)
- Berit Granum
- Norwegian Institute of Public Health, Oslo, Norway.
| | | | - Lydiane Agier
- Team of Environmental Epidemiology, IAB, Institute for Advanced Biosciences, Inserm, CNRS, CHU-Grenoble-Alpes, University Grenoble-Alpes, Grenoble, France
| | - Valerie Siroux
- Team of Environmental Epidemiology, IAB, Institute for Advanced Biosciences, Inserm, CNRS, CHU-Grenoble-Alpes, University Grenoble-Alpes, Grenoble, France
| | - Philippa Bird
- Bradford Institute for Health Research, Bradford Teaching Hospitals NHS Foundation Trust, Bradford UK
| | - Maribel Casas
- ISGlobal, Barcelona, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Charline Warembourg
- ISGlobal, Barcelona, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - John Wright
- Bradford Institute for Health Research, Bradford Teaching Hospitals NHS Foundation Trust, Bradford UK
| | - Leda Chatzi
- Department of Preventive Medicine, Keck School of Medicine, University of Southern California, Los Angeles, USA; Department of Social Medicine, University of Crete, Greece; Department of Genetics & Cell Biology, Faculty of Health, Medicine and Life Sciences, Maastricht University, Maastricht, Netherlands
| | - Montserrat de Castro
- ISGlobal, Barcelona, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - David Donaire
- ISGlobal, Barcelona, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Regina Grazuleviciene
- Department of Environmental Sciences, Vytauto Didziojo Universitetas, Kaunas, Lithuania
| | | | - Lea Maitre
- ISGlobal, Barcelona, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Oliver Robinson
- ISGlobal, Barcelona, Spain; MRC-PHE Centre for Environment and Health, School of Public Health, Imperial College London, London, United Kingdom
| | | | | | - Mark Nieuwenhuijsen
- ISGlobal, Barcelona, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
| | - Remy Slama
- Team of Environmental Epidemiology, IAB, Institute for Advanced Biosciences, Inserm, CNRS, CHU-Grenoble-Alpes, University Grenoble-Alpes, Grenoble, France
| | | | - Martine Vrijheid
- ISGlobal, Barcelona, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain; CIBER Epidemiología y Salud Pública (CIBERESP), Madrid, Spain
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He Z, Wu H, Zhang S, Lin Y, Li R, Xie L, Li Z, Sun W, Huang X, Zhang CJP, Ming WK. The association between secondhand smoke and childhood asthma: A systematic review and meta-analysis. Pediatr Pulmonol 2020; 55:2518-2531. [PMID: 32667747 DOI: 10.1002/ppul.24961] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [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: 01/19/2020] [Revised: 07/10/2020] [Accepted: 07/12/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Secondhand smoke (SHS) exposure can trigger asthma exacerbations in children. Different studies have linked increased asthma symptoms and even deaths in children with SHS, but the risk has not been quantified uniformly across studies. We aimed to investigate the role of SHS exposure as a risk factor of asthma among children. METHODS We performed a systematic review in PubMed, Scopus, and Google Scholar from June 1975 to 10 March 2020. We included cohort, case-control, and cross-sectional studies reporting odds ratio (OR) or relative risk estimates and confidence intervals of all types of SHS exposure and childhood asthma. RESULTS Of the 26 970 studies identified, we included 93 eligible studies (42 cross-sectional, 41 cohort, and 10 case-control) in the meta-analysis. There were significantly positive associations between SHS exposure and doctor-diagnosed asthma (OR = 1.24; 95% confidence interval (CI) = 1.20-1.28), wheezing (OR = 1.27; 95% CI = 1.23-1.32) and asthma-like syndrome (OR = 1.34; 95% CI = 1.34-1.64). The funnel plots of all three outcomes skewed to the right, indicating that the studies generally favor a positive association of the disease with tobacco exposure. Subgroup analysis demonstrated that younger children tended to suffer more from developing doctor-diagnosed asthma, but older children (adolescents) suffered more from wheezing. There was no evidence of significant publication or small study bias using Egger's and Begg's tests. CONCLUSION The results show a positive association between prenatal and postnatal secondhand smoking exposure and the occurrence of childhood asthma, asthma-like syndrome, and wheezing. These results lend support to continued efforts to reduce childhood exposure to secondhand smoke.
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Affiliation(s)
- Zonglin He
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou, Guangdong, China.,Faculty of Medicine, International School, Jinan University, Guangzhou, Guangdong, China
| | - Huailiang Wu
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou, Guangdong, China.,Faculty of Medicine, International School, Jinan University, Guangzhou, Guangdong, China
| | - Siyu Zhang
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou, Guangdong, China.,Faculty of Medicine, International School, Jinan University, Guangzhou, Guangdong, China
| | - Yuchen Lin
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou, Guangdong, China.,Faculty of Medicine, International School, Jinan University, Guangzhou, Guangdong, China
| | - Rui Li
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou, Guangdong, China.,Faculty of Medicine, International School, Jinan University, Guangzhou, Guangdong, China
| | - Lijie Xie
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou, Guangdong, China.,Faculty of Medicine, International School, Jinan University, Guangzhou, Guangdong, China
| | - Zibo Li
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou, Guangdong, China.,Faculty of Medicine, International School, Jinan University, Guangzhou, Guangdong, China
| | - Weiwei Sun
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou, Guangdong, China.,Faculty of Medicine, International School, Jinan University, Guangzhou, Guangdong, China
| | - Xinyu Huang
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou, Guangdong, China.,Faculty of Medicine, International School, Jinan University, Guangzhou, Guangdong, China
| | - Casper J P Zhang
- School of Public Health, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong
| | - Wai-Kit Ming
- Department of Public Health and Preventive Medicine, School of Medicine, Jinan University, Guangzhou, Guangdong, China.,Faculty of Medicine, International School, Jinan University, Guangzhou, Guangdong, China.,School of Biomedical Sciences, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong.,Harvard Medical School, Harvard University, Boston, Massachusetts
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10
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Huang CC, Chiang TL, Chen PC, Lin SJ, Wen HJ, Guo YL. Risk factors for asthma occurrence in children with early-onset atopic dermatitis: An 8-year follow-up study. Pediatr Allergy Immunol 2018; 29:159-165. [PMID: 29168282 DOI: 10.1111/pai.12835] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [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] [Accepted: 11/17/2017] [Indexed: 12/29/2022]
Abstract
BACKGROUND Children with early-onset atopic dermatitis (AD) are at substantial risk of developing asthma later in life, and identifying the critical window of detrimental exposure is advantageous for implementing preventive actions. The aim of this study was to evaluate the role of exposure to environmental modifiers during pregnancy and early childhood in asthma occurrence in an infantile AD cohort. METHODS Eligible study participants were selected from the Taiwan Birth Cohort Study, which enrolled 24 200 newborns in 2005. We enrolled those cases who had been diagnosed as having AD before 3 years of age and followed them up till age 8. We excluded those ever diagnosed with asthma before AD onset. The dependent variable was defined in terms of whether the participant was diagnosed as having asthma before 8 years of age. We applied logistic regression models to evaluate the risks of exposure to different determinants in asthma occurrence. RESULTS A total of 1549 children with AD had completed the 8-year follow-up, and 334 (21.6%) of them had asthma. The results revealed that male sex, lower birth order, maternal asthma history, maternal obesity before pregnancy, and environmental tobacco smoke exposure before 3 years of age were significant risk factors for further development of asthma. Furthermore, food allergy during early life, lower respiratory tract infection, and longer durations of symptomatic AD influenced asthma development later in life. CONCLUSIONS The findings confirmed the critical determinants for asthma occurrence in infantile AD, which may enable a more personalized approach to the prevention of asthma.
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Affiliation(s)
- Ching-Chun Huang
- Environmental and Occupational Medicine, National Taiwan University and National Taiwan University Hospital, Taipei, Taiwan.,Institute of Occupational Medicine and Industrial Hygiene, National Taiwan University, Taipei, Taiwan
| | - Tung-Liang Chiang
- Institute of Health Policy and Management, National Taiwan University, Taipei, Taiwan
| | - Pau-Chung Chen
- Environmental and Occupational Medicine, National Taiwan University and National Taiwan University Hospital, Taipei, Taiwan.,Institute of Occupational Medicine and Industrial Hygiene, National Taiwan University, Taipei, Taiwan
| | - Shio-Jean Lin
- Department of Pediatrics, Chi Mei Hospital, Tainan, Taiwan
| | - Hui-Ju Wen
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Yue Leon Guo
- Environmental and Occupational Medicine, National Taiwan University and National Taiwan University Hospital, Taipei, Taiwan.,Institute of Occupational Medicine and Industrial Hygiene, National Taiwan University, Taipei, Taiwan.,National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
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11
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Tanaka K, Miyake Y, Furukawa S, Arakawa M. Secondhand smoke exposure and risk of wheeze in early childhood: a prospective pregnancy birth cohort study. Tob Induc Dis 2017; 15:30. [PMID: 28729819 PMCID: PMC5516318 DOI: 10.1186/s12971-017-0138-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2017] [Accepted: 07/12/2017] [Indexed: 11/18/2022] Open
Abstract
Background Evidence regarding the independent and additive effects of both pre- and postnatal smoking exposure on the risk of wheeze in children is limited. The purpose of this prospective pregnancy birth cohort study was to examine the association between prenatal and postnatal tobacco smoke exposure during the first year of life and the risk of wheeze in Japanese children aged 23 to 29 months. Methods Study subjects were 1354 Japanese mother-child pairs. Information on the variables under study was obtained using repeated questionnaires that were completed by mothers, first prior to delivery, then shortly after birth and subsequently around 4, 12, and 24 months after delivery. Wheeze was defined according to the criteria of the International Study of Asthma and Allergies in Childhood. Results Compared with no maternal smoking during pregnancy, maternal smoking throughout pregnancy was significantly associated with an increased risk of wheeze in children, yet there were no associations between maternal smoking in the first trimester only or in the second and/or third trimesters and the risk of wheeze. No association was observed between postnatally living with at least one household smoker and the risk of wheeze. An analysis to assess the additive effect of prenatal and postnatal smoking exposure revealed that, compared with children not exposed to maternal smoking during pregnancy and not postnatally living with at least one household smoker, those who were both exposed to maternal smoking during pregnancy and postnatally living with at least one household smoker had twofold odds of developing wheeze. Conclusions Our findings suggest that maternal smoking throughout pregnancy might be associated with an increased risk of wheeze in children. There is also the possibility of a positive additive effect of pre- and postnatal smoking exposure on the risk of childhood wheeze. Electronic supplementary material The online version of this article (doi:10.1186/s12971-017-0138-7) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Keiko Tanaka
- Department of Epidemiology and Preventive Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, 791-0295 Japan.,Epidemiology and Medical Statistics Unit, Translational Research Center, Ehime University Hospital, Ehime, Japan
| | - Yoshihiro Miyake
- Department of Epidemiology and Preventive Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, 791-0295 Japan.,Epidemiology and Medical Statistics Unit, Translational Research Center, Ehime University Hospital, Ehime, Japan
| | - Shinya Furukawa
- Department of Epidemiology and Preventive Medicine, Ehime University Graduate School of Medicine, Shitsukawa, Toon, Ehime, 791-0295 Japan.,Epidemiology and Medical Statistics Unit, Translational Research Center, Ehime University Hospital, Ehime, Japan
| | - Masashi Arakawa
- Health Tourism Research Fields, Graduate School of Tourism Sciences, University of the Ryukyus, Okinawa, Japan
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12
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Faraldo-García A, Lopez-Silvarrey A, Pertega S, Cruz MJ, Sampedro M, Sánchez-Lastres J, San-José Gónzalez MA, Bamonde L, Garnelo L, Pérez-Castro T, Valdés-Cuadrado L, Gonzalez-Barcala FJ. Cross-sectional study about impact of parental smoking on rhinitis symptoms in children. Clin Otolaryngol 2017; 42:1275-1280. [PMID: 28306200 DOI: 10.1111/coa.12868] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/12/2017] [Indexed: 11/30/2022]
Abstract
OBJECTIVE Assess the prevalence of rhinitis and exposure to environmental tobacco smoke (ETS) of children in our community and its relationship with symptoms of rhinitis METHODS (DESIGN, SETTING, PARTICIPANTS, MAIN OUTCOME MEASURES): Cross-sectional study using questionnaire on rhinitis of the International Study of Asthma and Allergies in Childhood, in children (6-7 years) and adolescents (13-14 years). Categories: "rhinitis ever", "recent rhinitis", "recent rhinoconjunctivitis", "severe rhinoconjunctivitis". Parental smoking: (i) neither parent smokes; (ii) only the mother smokes; (iii) only the father smokes; and (iv) both parents smoke. Odds ratio of the prevalence of symptoms of rhinitis according to ETS exposure was calculated using logistic regression. RESULTS 10 690 children and 10 730 adolescents. The prevalence of "rhinitis ever" in children: 29.4%, "recent rhinitis" 24%, "recent rhinoconjunctivitis" 11.5% and "severe rhinoconjunctivitis" 0.1%. In adolescents: 46.2%, 34.5%, 16.2% and 0.2%, respectively. Environmental tobacco smoke exposure in the home occurred in 51% of cases. Parental smoking was associated with a higher prevalence of forms of rhinitis in adolescents when only the mother was a smoker. In children when both parents were smokers. CONCLUSION Rhinitis is highly prevalent in our community. Environmental tobacco smoke exposure is still very common. The relationship between ETS and rhinitis symptoms in children of this community is not as robust as that found for asthma.
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Affiliation(s)
- A Faraldo-García
- Departament of Otorhinolaryngology, University Hospital of Santiago de Compostela, Santiago de Compostela, Spain
| | | | - S Pertega
- Clinical Epidemiology and Biostatistics Unit, University Hospital Complex, A Coruña, Spain
| | - M-J Cruz
- Spanish Biomedical Research Networking Centre-CIBERES, Madrid, Spain.,Department of Respiratory Medicine, Hospital Universitari Vall d'Hebron, Barcelona, Spain
| | - M Sampedro
- Departament of Pediatrics, Servicio Galego de Saúde, A Coruña, Spain
| | - J Sánchez-Lastres
- Departament of Pediatrics, Servicio Galego de Saúde, A Coruña, Spain
| | | | - L Bamonde
- Departament of Pediatrics, Servicio Galego de Saúde, A Coruña, Spain
| | - L Garnelo
- Departament of Pediatrics, Servicio Galego de Saúde, A Coruña, Spain
| | - T Pérez-Castro
- Grupo de investigación Cardiovascular (GRINCAR), Instituto de Investigación Biomédica de A Coruña (INIBIC), Instituto Universitario de Ciencias de la Salud, Universidade da Coruña, A Coruña, Spain
| | - L Valdés-Cuadrado
- Department of Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain.,Department of Respiratory Medicine, University Hospital of Santiago de Compostela, Santiago de Compostela, Spain.,Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
| | - F-J Gonzalez-Barcala
- Spanish Biomedical Research Networking Centre-CIBERES, Madrid, Spain.,Department of Medicine, University of Santiago de Compostela, Santiago de Compostela, Spain.,Department of Respiratory Medicine, University Hospital of Santiago de Compostela, Santiago de Compostela, Spain.,Health Research Institute of Santiago de Compostela (IDIS), Santiago de Compostela, Spain
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13
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Pirini F, Goldman LR, Soudry E, Halden RU, Witter F, Sidransky D, Guerrero-Preston R. Prenatal exposure to tobacco smoke leads to increased mitochondrial DNA content in umbilical cord serum associated to reduced gestational age. Int J Environ Health Res 2017; 27:52-67. [PMID: 28002977 PMCID: PMC5532520 DOI: 10.1080/09603123.2016.1268677] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2016] [Accepted: 11/11/2016] [Indexed: 05/22/2023]
Abstract
We investigated if prenatal exposures to tobacco smoke lead to changes in mitochondrial DNA content (mtDNA) in cord serum and adversely affect newborns' health. Umbilical cord serum cotinine levels were used to determine in utero exposure to smoking. Cord serum mtDNA was measured by quantitative polymerase chain reaction analysis of the genes coding for cytochrome c oxidase1 (MT-CO1) and cytochrome c oxidase2 (MT-CO2). Log transformed levels of mtDNA coding for MT-CO1 and MT-CO2 were significantly higher among infants of active smokers with higher serum level of cotinine (p < 0.05) and inversely associated with gestational age (p = 0.08; p = 0.02). Structural equation modeling results confirmed a positive association between cotinine and MT-CO1 and2 (p < 0.01) and inverse associations with gestational age (p = 0.02) and IGF-1 (p < 0.01). We identified a dose-dependent increase in the level of MT-CO1 and MT-CO2 associated to increased cord serum cotinine and decreased gestational age.
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Affiliation(s)
- Francesca Pirini
- The Johns Hopkins University, School of Medicine, Otolaryngology Department, Head and Neck Cancer Research Division, Baltimore, USA
| | - Lynn R. Goldman
- The George Washington University, Milken Institute School of Public Health, Washington, District of Columbia, USA
| | - Ethan Soudry
- The Johns Hopkins University, School of Medicine, Otolaryngology Department, Head and Neck Cancer Research Division, Baltimore, USA
| | - Rolf U. Halden
- Arizona State University, The Biodesign Institute and Global Security Initiative, Center for Environmental Security, Tempe, Arizona
| | - Frank Witter
- The Johns Hopkins University, School of Medicine, Obstetrics and Gynecology Department, Baltimore, USA
| | - David Sidransky
- The Johns Hopkins University, School of Medicine, Otolaryngology Department, Head and Neck Cancer Research Division, Baltimore, USA
- Co-corresponding authors: Rafael Guerrero-Preston, DrPH, MPH, . David Sidransky, MD, , Johns Hopkins School of Medicine, Head and Neck Cancer Research Division, 1550 Orleans Street, Cancer Research Building II, Room 5M, Baltimore. MD, 21231, 410-502-5153
| | - Rafael Guerrero-Preston
- The Johns Hopkins University, School of Medicine, Otolaryngology Department, Head and Neck Cancer Research Division, Baltimore, USA
- University of Puerto Rico School of Medicine, Department of Obstetrics and Gynecology, San Juan, Puerto Rico
- Co-corresponding authors: Rafael Guerrero-Preston, DrPH, MPH, . David Sidransky, MD, , Johns Hopkins School of Medicine, Head and Neck Cancer Research Division, 1550 Orleans Street, Cancer Research Building II, Room 5M, Baltimore. MD, 21231, 410-502-5153
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14
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Gopal SH, Mukherjee S, Das SK. Direct and Second Hand Cigarette Smoke Exposure and Development of Childhood Asthma. J Environ Health Sci 2016; 2:Direct and Second Hand Cigarette Smoke Exposure and Development of Childhood Asthma. [PMID: 29399637 PMCID: PMC5791751 DOI: 10.15436/2378-6841.16.1122] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
This is a comprehensive review about the role of direct and second hand cigarette smoke exposure in the development of childhood asthma. Smoking, both during pregnancy and postnatal have an adverse impact on the infant's chances of developing respiratory illness. Second hand smoke exposure has also known to cause worsening of childhood asthma with an impact on hospital admissions. Correlation between maternal second hand smoke exposure during pregnancy and development of childhood asthma has also been investigated. It is, thus essential to address this prenatally as well as post-natal by reducing smoking as well as smoke exposure.
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Affiliation(s)
- Srirupa Hari Gopal
- Department of Biochemistry and Cancer Biology, Meharry Medical College, Nashville, TN, USA
| | - Shyamali Mukherjee
- Department of Professional Education, Neurosciences & Pharmacology, Meharry Medical College, Nashville, TN, USA
| | - Salil K. Das
- Department of Biochemistry and Cancer Biology, Meharry Medical College, Nashville, TN, USA
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15
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Thacher JD, Gruzieva O, Pershagen G, Neuman Å, Hage M, Wickman M, Kull I, Melén E, Bergström A. Parental smoking and development of allergic sensitization from birth to adolescence. Allergy 2016; 71:239-48. [PMID: 26475651 PMCID: PMC5063181 DOI: 10.1111/all.12792] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/12/2015] [Indexed: 11/27/2022]
Abstract
Background The relation between secondhand tobacco smoke (SHS) exposure and the development of allergic sensitization in children is unclear. The aim of this study was to determine whether maternal smoking during pregnancy and postnatal SHS exposure contributes to the development of allergic sensitization in children and adolescents up to 16 years of age. Methods We included 3316 children from a birth cohort followed up for 16 years. SHS exposure and symptoms of allergic disease were assessed using repeated parental questionnaires. Serum immunoglobulin E against eight common inhalant and six food allergens was assessed at ages 4, 8, and 16 years with ImmunoCAP. The association between SHS exposure and sensitization was explored using logistic regression and generalized estimating equations. Results Exposure to SHS in infancy without prior exposure in utero was associated with an excess risk of food sensitization at age 4 years (OR 1.47, 95% CI 1.08–2.00), with comparable ORs at ages 8 and 16 years. In longitudinal analyses, an overall association was indicated between SHS in infancy and food sensitization up to age 16 years (OR 1.24, 95% CI 0.98–1.56). Maternal smoking during pregnancy was unrelated to sensitization up to 16 years of age. When sensitization was combined with concurrent symptoms of allergic disease, SHS in infancy was associated with an overall elevated risk of eczema with sensitization (OR 1.62, 95% CI 1.20–2.18). Conclusions SHS exposure in infancy appears to increase the risk of sensitization to food allergens up to age 16 years, as well as eczema in combination with sensitization.
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Affiliation(s)
- J. D. Thacher
- Institute of Environmental Medicine Karolinska Institutet Stockholm Sweden
| | - O. Gruzieva
- Institute of Environmental Medicine Karolinska Institutet Stockholm Sweden
| | - G. Pershagen
- Institute of Environmental Medicine Karolinska Institutet Stockholm Sweden
- Centre for Occupational and Environmental Medicine Stockholm County Council Stockholm Sweden
| | - Å. Neuman
- Institute of Environmental Medicine Karolinska Institutet Stockholm Sweden
- Department of Women's and Children's Health Uppsala University Hospital Uppsala Sweden
| | - M. Hage
- Clinical Immunology and Allergy Unit Department of Medicine Solna Karolinska Institutet and University Hospital Stockholm Sweden
| | - M. Wickman
- Institute of Environmental Medicine Karolinska Institutet Stockholm Sweden
- Sachs’ Children's Hospital Södersjukhuset Stockholm Sweden
| | - I. Kull
- Institute of Environmental Medicine Karolinska Institutet Stockholm Sweden
- Sachs’ Children's Hospital Södersjukhuset Stockholm Sweden
- Department of Clinical Science and Education Karolinska Institutet at Södersjukhuset Stockholm Sweden
| | - E. Melén
- Institute of Environmental Medicine Karolinska Institutet Stockholm Sweden
- Sachs’ Children's Hospital Södersjukhuset Stockholm Sweden
| | - A. Bergström
- Institute of Environmental Medicine Karolinska Institutet Stockholm Sweden
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16
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Cao J, Xu X, Hylkema MN, Zeng EY, Sly PD, Suk WA, Bergman Å, Huo X. Early-life Exposure to Widespread Environmental Toxicants and Health Risk: A Focus on the Immune and Respiratory Systems. Ann Glob Health 2016; 82:119-31. [PMID: 27325070 DOI: 10.1016/j.aogh.2016.01.023] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Evidence has accumulated that exposure to widespread environmental toxicants, such as heavy metals, persistent organic pollutants, and tobacco smoke adversely affect fetal development and organ maturation, even after birth. The developing immune and respiratory systems are more sensitive to environmental toxicants due to their long-term physical development, starting from the early embryonic stage and persisting into early postnatal life, which requires complex signaling pathways that control proliferation and differentiation of highly heterogeneous cell types. In this review, we summarize the effect of early-life exposure to several widespread environmental toxicants on immune and lung development before and after birth, including the effects on immune cell counts, baseline characteristics of cell-mediated and humoral immunity, and alteration of lung structure and function in offspring. We also review evidence supporting the association between early-life exposure to environmental toxicants and risk for immune-related diseases and lung dysfunction in offspring in later life.
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Affiliation(s)
- Junjun Cao
- Laboratory of Environmental Medicine and Developmental Toxicology, Shantou University Medical College, Shantou, China; Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands; GRIAC Research Institute, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Xijin Xu
- Laboratory of Environmental Medicine and Developmental Toxicology, Shantou University Medical College, Shantou, China.
| | - Machteld N Hylkema
- Department of Pathology and Medical Biology, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands; GRIAC Research Institute, University of Groningen, University Medical Center Groningen, Groningen, The Netherlands
| | - Eddy Y Zeng
- School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou, China
| | - Peter D Sly
- Children's Health and Environment Program, Child Health Research Centre, The University of Queensland, Queensland, Australia
| | - William A Suk
- Hazardous Substances Research Branch, Superfund Research Program, National Institute for Environmental Health Sciences, National Institutes of Health, Bethesda, MD
| | - Åke Bergman
- Swedish Toxicology Sciences Research Center (Swetox), Södertälje, Sweden
| | - Xia Huo
- Laboratory of Environmental Medicine and Developmental Toxicology, Shantou University Medical College, Shantou, China; School of Environment, Guangzhou Key Laboratory of Environmental Exposure and Health, Guangdong Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou, China
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17
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Abstract
Allergic disease development is affected by both genes and the environment, and epigenetic mechanisms are hypothesized to mediate these environmental effects. In this article, we discuss the link between the environment, DNA methylation and allergic disease, as well as questions of causality inherent to analyses of DNA methylation. From the practical side, we describe characteristics of allergic phenotypes and contrast different epidemiologic study designs used in epigenetic research. We examine methodological considerations, how best to conduct preprocessing and analysis of DNA methylation data sets, and the latest methods, technologies and discoveries in this rapidly advancing field. DNA methylation and other epigenetic marks are firmly entwined with allergic disease, a link that may hold the basis for future allergic disease diagnosis and treatment.
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Affiliation(s)
- Gabrielle A Lockett
- Human Development & Health, Faculty of Medicine, University of Southampton, Southampton, UK
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18
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Abstract
This thesis explores the contribution of twin studies, particularly those studies originating from the Danish Twin Registry, to the understanding of the aetiology of asthma. First, it is explored how twin studies have established the contribution of genetic and environmental factors to the variation in the susceptibility to asthma, and to the variation in several aspects of the clinical expression of the disease such as its age at onset, its symptomatology, its intermediate phenotypes, and its relationship with other atopic diseases. Next, it is explored how twin studies have corroborated theories explaining asthma's recent increase in prevalence, and last, how these fit with the explanations of the epidemiological trends in other common chronic diseases of modernity.
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19
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Charoenca N, Kungskulniti N, Tipayamongkholgul M, Sujirarat D, Lohchindarat S, Mock J, Hamann SL. Determining the burden of secondhand smoke exposure on the respiratory health of Thai children. Tob Induc Dis 2013; 11:7. [PMID: 23506470 DOI: 10.1186/1617-9625-11-7] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2012] [Accepted: 03/12/2013] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND The impact of secondhand smoke (SHS) on Southeast Asian children's health has been assessed by a limited number of studies. The purpose of this study was to determine whether in Thailand, pre- and postnatal exposure to SHS is associated with acute lower respiratory conditions in young children. METHODS We conducted a case control study of 462 children under age five admitted with acute lower respiratory illnesses, including asthma and pneumonia, at a major hospital in Bangkok. We selected 462 comparison controls from the well-child clinic at the hospital and matched them by sex and age. We used a structured questionnaire to collect information about exposure to SHS and other factors. We conducted bivariate and multivariate analyses to identify risk factors for acute lower respiratory conditions. RESULTS The number of cigarettes smoked at home per day by household members was significantly greater among cases. A greater number of household caregivers of cases held and carried children while smoking as compared to controls (26% versus 7%, p <0.05). Cases were more likely to have been exposed to SHS in the household (adjusted OR = 3.82, 95% CI = 2.47-5.9), and outside (adjusted OR = 2.99, 95% CI = 1.45-6.15). Parental lower educational level and low household income were also associated with respiratory illnesses in Thai children under five. CONCLUSIONS Thai children who are exposed to SHS are at nearly 4 times greater risk of developing acute lower respiratory conditions. Continued effort is needed in Thailand to eliminate children's exposure to SHS, especially at home.
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