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Du L, Zhang X, Wu C, Zhou R, Chen L, Gui R, Wang W, An M, Wang X. Association of food folate with asthma in US children and adolescents: a cross-sectional study. J Asthma 2024:1-9. [PMID: 39012758 DOI: 10.1080/02770903.2024.2380509] [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: 04/07/2024] [Revised: 06/21/2024] [Accepted: 07/10/2024] [Indexed: 07/18/2024]
Abstract
BACKGROUND Asthma is a chronic inflammatory disease. Currently, contradictory findings exist regarding the association between food folate and asthma. Therefore, we hypothesize a positive correlation between food folate and asthma. PURPOSE To investigate the possible relationship between food folate intake and the development of asthma in children and adolescents in the United States. METHODS Data from the U.S. National Health and Nutrition Examination Survey (NHANES) from 2009 to 2018 were analyzed cross-sectionally by covariate adjustment using multivariate logistic regression, restricted triple spline curves, threshold effects, and stratified analyses. RESULTS There were 8,821 participants, of whom 1,697 (19.2%) self-reported having received a diagnosis of asthma from a physician or other health professional. After accounting for potential confounders, the adjusted odds ratios (ORs) for asthma in the second (T2, 111-178 µg/day) and third (T3, >178 µg/day) groups were 1.15 (1-1.33) and 1.23 (1.04-1.46), respectively, compared with the group with the lowest food folate intake (T1, <111 µg/day). In addition, the association between food folate intake and asthma showed an inverse L-shaped curve (non-linear relationship, p = 0.003), and stratified analysis further validated the robustness of the results. The OR of asthma in subjects with food folate intake less than 263.9 µg/day was 1.002 (1.001-1.004). CONCLUSION In children and adolescents in the United States, there is a non-linear association (inverted "L" shape) between food folate intake and asthma, with an inflection point at 263.9 micrograms per day.
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Affiliation(s)
- Linjun Du
- The Third People's Hospital of Liaocheng City, Shandong Province, China
| | - Xiaolan Zhang
- The Third People's Hospital of Liaocheng City, Shandong Province, China
| | - Cuiqing Wu
- Maternal and Child Health Center, Chiping District, Liaocheng City, Shandong Province, China
| | | | - Lifang Chen
- The Third People's Hospital of Liaocheng City, Shandong Province, China
| | - Ruping Gui
- Maternal and Child Health Center, Chiping District, Liaocheng City, Shandong Province, China
| | - Wei Wang
- Tai'an Maternal and Child Health Hospital, Shandong Province, China
| | - Mouzhen An
- Tai'an Maternal and Child Health Hospital, Shandong Province, China
| | - Xia Wang
- Maternal and Child Health Center, Chiping District, Liaocheng City, Shandong Province, China
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2
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Zajac D, Wojciechowski P. The Role of Vitamins in the Pathogenesis of Asthma. Int J Mol Sci 2023; 24:ijms24108574. [PMID: 37239921 DOI: 10.3390/ijms24108574] [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: 02/28/2023] [Revised: 04/27/2023] [Accepted: 05/09/2023] [Indexed: 05/28/2023] Open
Abstract
Vitamins play a crucial role in the proper functioning of organisms. Disturbances of their levels, seen as deficiency or excess, enhance the development of various diseases, including those of the cardiovascular, immune, or respiratory systems. The present paper aims to summarize the role of vitamins in one of the most common diseases of the respiratory system, asthma. This narrative review describes the influence of vitamins on asthma and its main symptoms such as bronchial hyperreactivity, airway inflammation, oxidative stress, and airway remodeling, as well as the correlation between vitamin intake and levels and the risk of asthma in both pre- and postnatal life.
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Affiliation(s)
- Dominika Zajac
- Department of Respiration Physiology, Mossakowski Medical Research Institute, Polish Academy of Sciences, 02-106 Warszawa, Poland
| | - Piotr Wojciechowski
- Department of Respiration Physiology, Mossakowski Medical Research Institute, Polish Academy of Sciences, 02-106 Warszawa, Poland
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3
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Wen J, Wang C, Giri M, Guo S. Association between serum folate levels and blood eosinophil counts in American adults with asthma: Results from NHANES 2011-2018. Front Immunol 2023; 14:1134621. [PMID: 36911740 PMCID: PMC9993087 DOI: 10.3389/fimmu.2023.1134621] [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: 12/30/2022] [Accepted: 02/14/2023] [Indexed: 02/25/2023] Open
Abstract
Background To date, many researches have investigated the correlation of folate and asthma occurrence. Nevertheless, few studies have discussed whether folate status is correlated with dis-ease severity, control or progression of asthma. So, we explored the correlation of serum folate and blood eosinophil counts in asthmatic adults to gain the role of folate in the control, progression, and treatment of asthma. Methods Data were obtained from the 2011-2018 NHANES, in which serum folate, blood eosinophils, and other covariates were measured among 2332 asthmatic adults. The regression model, XGBoost algorithm model, and generalized linear model were used to explore the potential correlation. Moreover, we conducted stratified analyses to determine certain populations. Results Among three models, the multivariate regression analysis demonstrated serum folate levels were negatively correlated with blood eosinophil counts among asthmatic adults with statistical significance. And we observed that blood eosinophil counts decreased by 0.20 (-0.34, -0.06)/uL for each additional unit of serum folate (nmol/L) after adjusting for confounders. Moreover, we used the XGBoost Algorithm model to identify the relative significance of chosen variables correlated with blood eosinophil counts and observed the linear relationship between serum folate levels and blood eosinophil counts by constructing the generalized linear model. Conclusions Our study indicated that serum folate levels were inversely associated with blood eosinophil counts in asthmatic adult populations of America, which indicated serum folate might be correlated with the immune status of asthmatic adults in some way. We suggested that serum folate might affect the control, development, and treatment of asthma. Finally, we hope more people will recognize the role of folate in asthma.
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Affiliation(s)
- Jun Wen
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Changfen Wang
- Department of Cardiology, The First Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Mohan Giri
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
| | - Shuliang Guo
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Chongqing Medical University, Chongqing Medical University, Chongqing, China
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4
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Allam VSRR, Paudel KR, Gupta G, Singh SK, Vishwas S, Gulati M, Gupta S, Chaitanya MVNL, Jha NK, Gupta PK, Patel VK, Liu G, Kamal MA, Hansbro PM, Oliver BGG, Chellappan DK, Dua K. Nutraceuticals and mitochondrial oxidative stress: bridging the gap in the management of bronchial asthma. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:62733-62754. [PMID: 35796922 PMCID: PMC9477936 DOI: 10.1007/s11356-022-21454-w] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/04/2022] [Accepted: 06/10/2022] [Indexed: 02/05/2023]
Abstract
Asthma is a chronic inflammatory disease primarily characterized by inflammation and reversible bronchoconstriction. It is currently one of the leading causes of morbidity and mortality in the world. Oxidative stress further complicates the pathology of the disease. The current treatment strategies for asthma mainly involve the use of anti-inflammatory agents and bronchodilators. However, long-term usage of such medications is associated with severe adverse effects and complications. Hence, there is an urgent need to develop newer, novel, and safe treatment modalities for the management of asthma. This has therefore prompted further investigations and detailed research to identify and develop novel therapeutic interventions from potent untapped resources. This review focuses on the significance of oxidative stressors that are primarily derived from both mitochondrial and non-mitochondrial sources in initiating the clinical features of asthma. The review also discusses the biological scavenging system of the body and factors that may lead to its malfunction which could result in altered states. Furthermore, the review provides a detailed insight into the therapeutic role of nutraceuticals as an effective strategy to attenuate the deleterious effects of oxidative stress and may be used in the mitigation of the cardinal features of bronchial asthma.
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Affiliation(s)
| | - Keshav Raj Paudel
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, NSW, 2007, Australia
| | - Gaurav Gupta
- School of Pharmacy, Suresh Gyan Vihar University, Jagatpura, Jaipur, India
- Department of Pharmacology, Saveetha Dental College, Saveetha Institute of Medical and Technical Sciences, Saveetha University, Chennai, India
- Uttaranchal Institute of Pharmaceutical Sciences, Uttaranchal University, Dehradun, India
| | - Sachin Kumar Singh
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, India
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, P.O. Box: 123 Broadway, Ultimo, NSW, 2007, Australia
| | - Sukriti Vishwas
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, India
| | - Monica Gulati
- School of Pharmaceutical Sciences, Lovely Professional University, Phagwara, Punjab, India
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, P.O. Box: 123 Broadway, Ultimo, NSW, 2007, Australia
| | - Saurabh Gupta
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | | | - Niraj Kumar Jha
- Department of Biotechnology, School of Engineering & Technology (SET), Sharda University, Greater Noida, Uttar Pradesh, India
- Department of Biotechnology, School of Applied & Life Sciences (SALS), Uttaranchal University, Dehradun, 248007, India
| | - Piyush Kumar Gupta
- Department of Life Sciences, School of Basic Sciences and Research (SBSR), Sharda University, Greater Noida, Uttar Pradesh, Australia
| | - Vyoma K Patel
- School of Clinical Medicine, Faculty of Medicine and Health, University of New South Wales, Sydney, NSW, 2052, Australia
- Faculty of Health, Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, NSW, 2007, Australia
| | - Gang Liu
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, NSW, 2007, Australia
| | - Mohammad Amjad Kamal
- King Fahd Medical Research Center, King Abdulaziz University, P. O. Box 80216, Jeddah, 21589, Saudi Arabia
- Institutes for Systems Genetics, Frontiers Science Center for Disease related Molecular Network, West China Hospital, Sichuan University, Chengdu, China
- Enzymoics, Novel Global Community Educational Foundation, 7 Peterlee Place, Hebersham, NSW, 2770, Australia
- Department of Pharmacy, Faculty of Allied Health Sciences, Daffodil International University, Dhaka, 1207, Bangladesh
| | - Philip M Hansbro
- Centre for Inflammation, Centenary Institute and University of Technology Sydney, School of Life Sciences, Faculty of Science, Sydney, NSW, 2007, Australia
| | - Brian Gregory George Oliver
- School of Life Sciences, Faculty of Science, University of Technology Sydney, Ultimo, NSW, Australia
- Woolcock Institute of Medical Research, University of Sydney, Sydney, NSW, Australia
| | - Dinesh Kumar Chellappan
- Department of Life Sciences, School of Pharmacy, International Medical University, Bukit Jalil, Kuala Lumpur, 57000, Malaysia
| | - Kamal Dua
- Woolcock Institute of Medical Research, University of Sydney, Sydney, NSW, Australia.
- Discipline of Pharmacy, Graduate School of Health, University of Technology Sydney, P.O. Box: 123 Broadway, Ultimo, NSW, 2007, Australia.
- Faculty of Health, Australian Research Centre in Complementary and Integrative Medicine, University of Technology Sydney, Ultimo, NSW, 2007, Australia.
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5
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Wang Y, Hong X, Yao TC, Tsai HJ, Wang X. Interaction of maternal asthma history and plasma folate levels on child asthma risk in the Boston Birth Cohort. Pediatr Pulmonol 2021; 56:3728-3736. [PMID: 34607393 PMCID: PMC8629970 DOI: 10.1002/ppul.25680] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/15/2021] [Revised: 07/28/2021] [Accepted: 08/13/2021] [Indexed: 11/07/2022]
Abstract
BACKGROUND Previous studies on maternal folate status during pregnancy and child asthma risk yielded mixed results, and few considered maternal asthma history, a known risk factor of childhood asthma. This study examined whether the role of maternal folate in childhood asthma differs by maternal asthma history and whether there is an interaction between the two factors. METHODS This study included 1948 mother-child dyads from the Boston Birth Cohort. Childhood asthma was defined based on physician diagnosis documented in electronic medical records, and maternal asthma was based on standard questionnaire interview. Maternal plasma folate level within a few days of delivery was measured by chemiluminescent immunoassay. Logistic regression models were applied to examine individual and joint associations of maternal asthma history and plasma folate level with childhood asthma, adjusting for other covariables. RESULTS When stratified by maternal asthma history, an L-shaped relationship between maternal folate level and child asthma was observed in children born to mothers with asthma history (pinteraction = 0.03). The highest risk was found in children having maternal asthma history and low maternal folate level (odds ratio = 5.93; 95% confidence interval: 2.86-12.3) compared with children without maternal asthma history and with sufficient maternal folate levels. Sensitivity analyses using different definitions of asthma and stratified by major covariables yielded similar findings. CONCLUSION In this US prospective high-risk birth cohort, maternal asthma history and low folate level interactively increased the risk of child asthma. If further confirmed, optimizing maternal folate levels during pregnancy may mitigate child asthma risk in the setting of maternal asthma history.
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Affiliation(s)
- You Wang
- Department of Epidemiology, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Xiumei Hong
- Department of Population, Family and Reproductive Health, Center on Early Life Origins of Disease, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA
| | - Tsung-Chieh Yao
- Division of Allergy, Asthma, and Rheumatology, Department of Pediatrics, Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Taoyuan, Taiwan.,Community Medicine Research Center, Chang Gung Memorial Hospital at Keelung, Keelung, Taiwan.,Chang Gung Immunology Consortium, Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Hui-Ju Tsai
- Department of Population, Family and Reproductive Health, Center on Early Life Origins of Disease, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA.,Institute of Population Health Sciences, National Health Research Institutes, Zhunan, Taiwan
| | - Xiaobin Wang
- Department of Population, Family and Reproductive Health, Center on Early Life Origins of Disease, Johns Hopkins University Bloomberg School of Public Health, Baltimore, Maryland, USA.,Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, Maryland, USA
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6
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Grant T, Brigham EP, McCormack MC. Childhood Origins of Adult Lung Disease as Opportunities for Prevention. THE JOURNAL OF ALLERGY AND CLINICAL IMMUNOLOGY-IN PRACTICE 2021; 8:849-858. [PMID: 32147138 DOI: 10.1016/j.jaip.2020.01.015] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 12/26/2019] [Accepted: 01/16/2020] [Indexed: 02/06/2023]
Abstract
Prenatal and childhood exposures have been shown to impact lung development, lung function trajectory, and incidence and prevalence of respiratory disease. Early life may serve as a window of susceptibility to such exposures, with the potential to influence lifelong respiratory health. Risk factors encountered in early life with potentially durable impact on lung health include prematurity, respiratory viral illness, allergen sensitization and exposure, tobacco use and exposure, indoor and outdoor pollution, diet, and obesity. These exposures vary in the extent to which they are modifiable, and interventions aimed at reducing harmful exposures range from individual-level behavior modification to policy initiatives implemented to promote population health. For many exposures, including tobacco-related exposures, multilevel interventions are needed. Future research is needed to provide insight as to early-life interventions to promote optimal lung growth and prevent development of chronic respiratory disease. Clinicians should play an active role, assisting individual patients in avoiding known detrimental exposures including maternal smoking during pregnancy and initiation of active smoking. Clinicians can be empowered by evidence to support policies promoting reduction of population-level risk factors, such as restriction on electronic cigarette sales and legislation to uphold air quality standards, to encourage attainment of maximal lung function and reduce risk of chronic lung disease.
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Affiliation(s)
- Torie Grant
- Division of Pediatric Allergy/Immunology, Johns Hopkins University School of Medicine, Baltimore, Md
| | - Emily P Brigham
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Md
| | - Meredith C McCormack
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Md.
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7
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Molloy AM, Mills JL. Folic Acid and Infant Allergy: Avoiding Rash Judgments. J Nutr 2021; 151:1367-1368. [PMID: 33877314 PMCID: PMC8169806 DOI: 10.1093/jn/nxab084] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2021] [Revised: 03/01/2021] [Accepted: 03/02/2021] [Indexed: 11/14/2022] Open
Affiliation(s)
| | - James L Mills
- Division of Intramural Population Health Research, Eunice Kennedy Shriver National Institute for Child Health and Human Development, Bethesda, MD, USA
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8
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Serum folate metabolites, asthma, and lung function in a nationwide US study. J Allergy Clin Immunol 2020; 146:220-222.e8. [PMID: 32018028 DOI: 10.1016/j.jaci.2020.01.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2019] [Revised: 01/21/2020] [Accepted: 01/22/2020] [Indexed: 11/21/2022]
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9
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Liu J, Li Z, Ye R, Liu J, Ren A. Periconceptional folic acid supplementation and risk of parent-reported asthma in children at 4-6 years of age. ERJ Open Res 2020; 6:00250-2019. [PMID: 32280668 PMCID: PMC7132036 DOI: 10.1183/23120541.00250-2019] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2019] [Accepted: 01/19/2020] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Folic acid supplementation is universally recommended for women of child-bearing age to prevent fetal neural tube defects (NTDs). Concerns have arisen over the potential risk for childhood allergy and asthma due to folic acid supplementation. We examined whether periconceptional supplementation with low-dose folic acid only was associated with an increased risk for allergy symptoms or asthma in offspring at 4-6 years of age. METHODS Out of 247 831 participating women enrolled in 1993-1996, 9090 were randomly selected and their children were followed up in 2000-2001. Information on mothers' demographic characteristics, folic acid supplementation and allergic diseases among children was collected. We used logistic regression to evaluate the association between folic acid intake and risk for allergic disease while adjusting for potential confounding factors. RESULTS The rate of allergy symptoms was 1.54% among children whose mothers had taken folic acid compared with 2.04% among those whose mothers had not taken folic acid, and the rate of asthma was 0.92% and 0.88%, respectively. Maternal folic acid supplementation was not associated with risk for allergy symptoms or asthma, with odds ratios (95% CI) of 0.80 (0.58-1.11) and 1.04 (0.67-1.61), respectively. No differences in the occurrence of allergy symptoms or asthma were observed when data were analysed by timing of supplementation or compliance with folic acid supplementation. CONCLUSIONS Supplementation with low-dose folic acid only during the periconceptional period did not increase risk for allergy symptoms or asthma in children at 4-6 years of age in a population without staple fortification with folic acid.
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Affiliation(s)
- Jufen Liu
- Institute of Reproductive and Child Health/Key Laboratory of Reproductive Health, National Health Commission of the People's Republic of China, Peking University, Beijing, PR China
- Dept of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, PR China
| | - Zhiwen Li
- Institute of Reproductive and Child Health/Key Laboratory of Reproductive Health, National Health Commission of the People's Republic of China, Peking University, Beijing, PR China
- Dept of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, PR China
| | - Rongwei Ye
- Institute of Reproductive and Child Health/Key Laboratory of Reproductive Health, National Health Commission of the People's Republic of China, Peking University, Beijing, PR China
- Dept of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, PR China
| | - Jianmeng Liu
- Institute of Reproductive and Child Health/Key Laboratory of Reproductive Health, National Health Commission of the People's Republic of China, Peking University, Beijing, PR China
- Dept of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, PR China
| | - Aiguo Ren
- Institute of Reproductive and Child Health/Key Laboratory of Reproductive Health, National Health Commission of the People's Republic of China, Peking University, Beijing, PR China
- Dept of Epidemiology and Biostatistics, School of Public Health, Peking University, Beijing, PR China
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10
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Polk BI, Bacharier LB. Potential Strategies and Targets for the Prevention of Pediatric Asthma. Immunol Allergy Clin North Am 2019; 39:151-162. [PMID: 30954167 DOI: 10.1016/j.iac.2018.12.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Asthma is the most common chronic disease of childhood in developed countries, with a continually increasing prevalence. The paradigm of asthma control is shifting from disease management to primary prevention, and the modification of numerous host and external factors have been proposed as methods to prevent recurrent wheeze and asthma in children, some with promising preliminary results. This article reviews potential asthma prevention strategies and identifies future areas of research.
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Affiliation(s)
- Brooke I Polk
- Edward Mallinckrodt Department of Pediatrics, Division of Allergy, Immunology, and Pulmonary Medicine, Washington University in St. Louis, One Children's Place, Campus Box 8116, St Louis, MO 63110-1077, USA.
| | - Leonard B Bacharier
- Edward Mallinckrodt Department of Pediatrics, Division of Allergy, Immunology, and Pulmonary Medicine, Washington University in St. Louis, One Children's Place, Campus Box 8116, St Louis, MO 63110-1077, USA
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11
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Keagy CD. The potential role of folate metabolism in interstitial cystitis. Int Urogynecol J 2018; 30:363-370. [PMID: 30293165 DOI: 10.1007/s00192-018-3771-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2018] [Accepted: 09/14/2018] [Indexed: 12/30/2022]
Abstract
The topic of interstitial cystitis (IC), also known as painful bladder syndrome (PBS), and folate/one carbon metabolism has previously been unaddressed in research. This narrative review highlights a potential connection for those with mast cell-related IC and histamine-mediated pain that is explored through four conceptual sections. The first section focuses on the nature of mast cell involvement and histamine-mediated pain in some interstitial cystitis patients. The second section reviews the literature on folate status in wider allergic conditions. The third section addresses the role of folate and methylation in general in histamine excretion. Finally, folate metabolism and vascular function are addressed because of the vascular abnormalities present in some IC bladders.
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Affiliation(s)
- Carolyn D Keagy
- Kaiser Permanente, 1795 Second Street, Berkeley, CA, 94710, USA.
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12
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Saco TV, Breitzig MT, Lockey RF, Kolliputi N. Epigenetics of Mucus Hypersecretion in Chronic Respiratory Diseases. Am J Respir Cell Mol Biol 2018; 58:299-309. [PMID: 29096066 DOI: 10.1165/rcmb.2017-0072tr] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
Asthma, chronic obstructive pulmonary disease, and cystic fibrosis are three chronic pulmonary diseases that affect an estimated 420 million individuals across the globe. A key factor contributing to each of these conditions is mucus hypersecretion. Although management of these diseases is vastly studied, researchers have only begun to scratch the surface of the mechanisms contributing to mucus hypersecretion. Epigenetic regulation of mucus hypersecretion, other than microRNA post-translational modification, is even more scarcely researched. Detailed study of epigenetic mechanisms, such as DNA methylation and histone modification, could not only help to better the understanding of these respiratory conditions but also reveal new treatments for them. Because mucus hypersecretion is such a complex event, there are innumerable genes involved in the process, which are beyond the scope of a single review. Therefore, the purpose of this review is to narrow the focus and summarize specific epigenetic research that has been conducted on a few aspects of mucus hypersecretion in asthma, chronic obstructive pulmonary disease, cystic fibrosis, and some cancers. Specifically, this review emphasizes the contribution of DNA methylation and histone modification of particular genes involved in mucus hypersecretion to identify possible targets for the development of future therapies for these conditions. Elucidating the role of epigenetics in these respiratory diseases may provide a breath of fresh air to millions of affected individuals around the world.
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Affiliation(s)
- Tara V Saco
- Division of Allergy and Immunology, Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - Mason T Breitzig
- Division of Allergy and Immunology, Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - Richard F Lockey
- Division of Allergy and Immunology, Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida
| | - Narasaiah Kolliputi
- Division of Allergy and Immunology, Department of Internal Medicine, Morsani College of Medicine, University of South Florida, Tampa, Florida
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13
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Reznikov LR, Meyerholz DK, Abou Alaiwa M, Kuan SP, Liao YSJ, Bormann NL, Bair TB, Price M, Stoltz DA, Welsh MJ. The vagal ganglia transcriptome identifies candidate therapeutics for airway hyperreactivity. Am J Physiol Lung Cell Mol Physiol 2018; 315:L133-L148. [PMID: 29631359 PMCID: PMC6139658 DOI: 10.1152/ajplung.00557.2017] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
Mainstay therapeutics are ineffective in some people with asthma, suggesting a need for additional agents. In the current study, we used vagal ganglia transcriptome profiling and connectivity mapping to identify compounds beneficial for alleviating airway hyperreactivity (AHR). As a comparison, we also used previously published transcriptome data from sensitized mouse lungs and human asthmatic endobronchial biopsies. All transcriptomes revealed agents beneficial for mitigating AHR; however, only the vagal ganglia transcriptome identified agents used clinically to treat asthma (flunisolide, isoetarine). We also tested one compound identified by vagal ganglia transcriptome profiling that had not previously been linked to asthma and found that it had bronchodilator effects in both mouse and pig airways. These data suggest that transcriptome profiling of the vagal ganglia might be a novel strategy to identify potential asthma therapeutics.
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Affiliation(s)
- Leah R Reznikov
- Department of Physiological Sciences, University of Florida , Gainesville, Florida
| | | | - Mahmoud Abou Alaiwa
- Department of Internal Medicine, University of Iowa , Iowa City, Iowa.,Pappajohn Biomedical Institute, Roy J. and Lucille A. Carver College of Medicine, University of Iowa , Iowa City, Iowa
| | - Shin-Ping Kuan
- Department of Physiological Sciences, University of Florida , Gainesville, Florida
| | - Yan-Shin J Liao
- Department of Physiological Sciences, University of Florida , Gainesville, Florida
| | | | - Thomas B Bair
- Iowa Institute of Human Genetics, University of Iowa , Iowa City, Iowa
| | - Margaret Price
- Department of Internal Medicine, University of Iowa , Iowa City, Iowa.,Pappajohn Biomedical Institute, Roy J. and Lucille A. Carver College of Medicine, University of Iowa , Iowa City, Iowa
| | - David A Stoltz
- Department of Internal Medicine, University of Iowa , Iowa City, Iowa.,Molecular Physiology and Biophysics, University of Iowa , Iowa City, Iowa.,Pappajohn Biomedical Institute, Roy J. and Lucille A. Carver College of Medicine, University of Iowa , Iowa City, Iowa.,Department of Biomedical Engineering, College of Engineering, University of Iowa , Iowa City, Iowa
| | - Michael J Welsh
- Department of Internal Medicine, University of Iowa , Iowa City, Iowa.,Molecular Physiology and Biophysics, University of Iowa , Iowa City, Iowa.,Pappajohn Biomedical Institute, Roy J. and Lucille A. Carver College of Medicine, University of Iowa , Iowa City, Iowa.,Howard Hughes Medical Institute, University of Iowa , Iowa City, Iowa
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14
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Trivedi MK, Sharma S, Rifas-Shiman SL, Camargo CA, Weiss ST, Oken E, Gillman MW, Gold DR, DeMeo DL, Litonjua AA. Folic Acid in Pregnancy and Childhood Asthma: A US Cohort. Clin Pediatr (Phila) 2018; 57:421-427. [PMID: 28884603 PMCID: PMC5823746 DOI: 10.1177/0009922817729482] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Prenatal folic acid exposure has been linked to higher risk of childhood asthma in countries that do not fortify the food supply with folic acid. This study seeks to examine this association in the United States, where the food supply is generally fortified with folic acid. Participants were 1279 mother-child pairs from Project Viva, an ongoing prospective birth cohort, with folic acid intake in pregnancy assessed through validated food frequency questionnaires. The primary outcome was physician-diagnosed asthma at mid-childhood. In an unadjusted logistic regression model, higher folic acid intake was associated with lower odds of asthma in mid-childhood (odds ratio [OR] 0.48; 95% CI 0.31-0.76). However, in the adjusted analysis this association was attenuated (adjusted OR [aOR] 0.80; 95% CI 0.49-1.33). Our results suggest that in the United States, where there is generalized folic acid fortification of food, maternal folic acid intake during pregnancy is not associated with asthma development in offspring.
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Affiliation(s)
- Michelle K. Trivedi
- Brigham and Women’s Hospital, Boston, MA, USA,Massachusetts General Hospital, Boston, MA, USA,University of Massachusetts Medical School, Worcester, MA, USA
| | - Sunita Sharma
- Brigham and Women’s Hospital, Boston, MA, USA,University of Colorado School of Medicine, Aurora, CO, USA
| | | | - Carlos A. Camargo
- Brigham and Women’s Hospital, Boston, MA, USA,Massachusetts General Hospital, Boston, MA, USA,Harvard School of Public Health, Boston, MA, USA
| | | | - Emily Oken
- Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA
| | - Matthew W. Gillman
- Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA,National Institutes of Health, Bethesda, MD, USA
| | - Diane R. Gold
- Brigham and Women’s Hospital, Boston, MA, USA,Harvard School of Public Health, Boston, MA, USA
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15
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den Dekker HT, Jaddoe VWV, Reiss IK, de Jongste JC, Duijts L. Maternal folic acid use during pregnancy, methylenetetrahydrofolate reductase gene polymorphism, and child's lung function and asthma. Clin Exp Allergy 2017; 48:175-185. [PMID: 29117460 DOI: 10.1111/cea.13056] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Revised: 09/18/2017] [Accepted: 10/14/2017] [Indexed: 11/27/2022]
Abstract
BACKGROUND Folic acid supplement use during pregnancy might affect childhood respiratory health, potentially mediated by methylenetetrahydrofolate reductase polymorphism C677T (MTHFR-C677T) carriership. OBJECTIVES We examined the associations of maternal folic acid supplement use and folate, vitamin B12 and homocysteine concentrations during pregnancy with childhood lung function and asthma. METHODS This study was embedded in a population-based prospective cohort study among 5653 children. Folic acid supplement use was assessed by questionnaires. Folate, vitamin B12 and homocysteine plasma concentrations were measured in early pregnancy and at birth. At age 10 years, forced expiratory volume in 1 second (FEV1 ), forced vital capacity (FVC), FEV1 /FVC, forced expiratory flow between 25% and 75% (FEF25-75 ), at 75% of FVC (FEF75 ), and asthma were examined. RESULTS Maternal folic acid supplement use during pregnancy was associated with higher childhood FEV1 and FVC and with a lower FEV1 /FVC, compared with no folic acid supplement use. Among mothers carrying MTHFR-C677T variants, preconceptional start of folic acid supplement use was associated with lower FEV1 /FVC (-0.17 [-0.32, -0.02]) and FEF25-75 (-0.24 [-0.40, -0.07]). Among children carrying MTHFR-C677T wild-type, a higher vitamin B12 level at birth was associated with a lower FEV1 (-0.07 [-0.12, -0.01]) and FVC (-0.09 [-0.15, -0.04]). Folate and homocysteine concentrations were not consistently associated with lower childhood lung function or asthma. CONCLUSIONS Preconceptional start of maternal folic acid supplement use and higher vitamin B12 concentrations at birth might adversely affect childhood lung function depending on MTHFR-C677T carriership. The clinical implications need to be evaluated.
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Affiliation(s)
- H T den Dekker
- The Generation R Study Group, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.,Department of Pediatrics, Division of Respiratory Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - V W V Jaddoe
- The Generation R Study Group, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.,Department of Pediatrics, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - I K Reiss
- Department of Pediatrics, Division of Neonatology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - J C de Jongste
- Department of Pediatrics, Division of Respiratory Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
| | - L Duijts
- Department of Pediatrics, Division of Respiratory Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands.,Department of Pediatrics, Division of Neonatology, Erasmus MC, University Medical Center Rotterdam, Rotterdam, The Netherlands
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16
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Han YY, Celedón JC. Maternal Folate Intake during Pregnancy and Childhood Asthma. Am J Respir Crit Care Med 2017; 195:155-156. [PMID: 28084816 DOI: 10.1164/rccm.201608-1713ed] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- Yueh-Ying Han
- 1 Children's Hospital of Pittsburgh of University of Pittsburgh Medical Center University of Pittsburgh Pittsburgh, Pennsylvania
| | - Juan C Celedón
- 1 Children's Hospital of Pittsburgh of University of Pittsburgh Medical Center University of Pittsburgh Pittsburgh, Pennsylvania
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17
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Nicholson A, Pollard SL, Lima JJ, Romero KM, Tarazona-Meza C, Malpartida-Guzmán G, Mougey E, Hansel NN, Checkley W. Serum folate concentrations, asthma, atopy, and asthma control in Peruvian children. Respir Med 2017; 133:29-35. [PMID: 29173446 PMCID: PMC5844363 DOI: 10.1016/j.rmed.2017.10.026] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2017] [Revised: 10/20/2017] [Accepted: 10/31/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND The relationship between folate status and asthma-related outcomes has not been carefully examined in low- and middle-income countries where folate deficiency is common. METHODS Ancillary analysis of an unmatched case-control study in which we analyzed serum folate concentrations in 412 children with asthma and 342 controls living in peri-urban communities in Lima, Peru. We examined baseline associations between folate and asthma, atopy, total serum IgE, pulmonary function, and fractional exhaled nitric oxide. We then followed children with asthma longitudinally for 6-9 months and assessed associations between folate and odds of uncontrolled asthma (defined as Asthma Control Test score ≤ 19) and of ≥1 emergency visits during follow-up. RESULTS A 10 ng/mL decrease in serum folate was associated with 45% higher adjusted odds of asthma (OR = 1.45, 95% CI 1.05-2.02). The folate-asthma relationship differed by atopic status: a 10 ng/mL decrease in serum folate was associated with a 2.4-fold higher odds of asthma among children without atopy (2.38, 1.20-4.72) and 23% higher odds of asthma in children with atopy (1.23, 0.85-1.80). Among children with asthma, a 10 ng/mL decrease in serum folate was associated with 62% higher odds of uncontrolled asthma (1.62, 1.02-2.56) and 73% higher odds of ≥1 emergency visits during follow-up (1.73, 1.05-2.85). CONCLUSIONS Serum folate concentrations were inversely associated with asthma, but this effect was stronger in children without atopy. Among children with asthma, lower serum folate concentrations were associated with higher risk of uncontrolled asthma.
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Affiliation(s)
- Andrew Nicholson
- Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, USA
| | - Suzanne L Pollard
- Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, USA; Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, USA
| | - John J Lima
- Center for Pharmacogenomics and Translational Research, Nemours Children's Health System, Jacksonville, FL, USA
| | - Karina M Romero
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, USA; Biomedical Research Unit, A.B. PRISMA, Lima, Peru
| | | | | | - Edward Mougey
- Center for Pharmacogenomics and Translational Research, Nemours Children's Health System, Jacksonville, FL, USA
| | - Nadia N Hansel
- Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, USA
| | - William Checkley
- Department of International Health, Bloomberg School of Public Health, Johns Hopkins University, Baltimore, USA; Division of Pulmonary and Critical Care, School of Medicine, Johns Hopkins University, Baltimore, USA.
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18
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Guilleminault L, Williams EJ, Scott HA, Berthon BS, Jensen M, Wood LG. Diet and Asthma: Is It Time to Adapt Our Message? Nutrients 2017; 9:E1227. [PMID: 29117118 PMCID: PMC5707699 DOI: 10.3390/nu9111227] [Citation(s) in RCA: 117] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2017] [Revised: 10/30/2017] [Accepted: 11/06/2017] [Indexed: 12/21/2022] Open
Abstract
Asthma is a chronic respiratory disorder which is associated with airway inflammation. Environmental factors, in association with genetic susceptibility, play a critical role in asthma pathophysiology. Inhaled allergens, smoke exposure, indoor and outdoor air pollution are common triggers of asthma symptoms. Although the role of diet has clearly established mechanisms in diseases such as cardiovascular disease, type 2 diabetes, and cancer, it is not commonly identified as a causal factor in asthma. However, some dietary patterns, such as the Western diet, which includes a high intake of refined grains, processed and red meats, and desserts, have pro-inflammatory effects. On the contrary, the Mediterranean diet, with high intake of fruits and vegetables has anti-inflammatory properties. The influence of food on asthma outcomes is of growing interest, but dietary habits of asthma patients are not commonly investigated in clinical practice. In this review, we focus on the impact of diet on asthma risk and asthma control. We also detail the influence of diet on obese patients with asthma.
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Affiliation(s)
- Laurent Guilleminault
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Evan J Williams
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Hayley A Scott
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Bronwyn S Berthon
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Megan Jensen
- Priority Research Centre Grow Up Well, Hunter Medical Research Institute, University of Newcastle, Callaghan, NSW 2308, Australia.
| | - Lisa G Wood
- Priority Research Centre for Healthy Lungs, Hunter Medical Research Institute, University of Newcastle, Callaghan, NSW 2308, Australia.
- Priority Research Centre Grow Up Well, Hunter Medical Research Institute, University of Newcastle, Callaghan, NSW 2308, Australia.
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19
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Gatford KL, Wooldridge AL, Kind KL, Bischof R, Clifton VL. Pre-birth origins of allergy and asthma. J Reprod Immunol 2017; 123:88-93. [PMID: 28760578 DOI: 10.1016/j.jri.2017.07.002] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2016] [Accepted: 07/15/2017] [Indexed: 12/18/2022]
Abstract
Allergy is a chronic disease that can develop as early as infancy, suggesting that early life factors are important in its aetiology. Variable associations between size at birth, a crude marker of the fetal environment, and allergy have been reported in humans and require comprehensive review. Associations between birth weight and allergy are however confounded in humans, and we and others have therefore begun exploring the effects of early life events on allergy in experimental models. In particular, we are using ovine models to investigate whether and how a restricted environment before birth protects against allergy, whether methyl donor availability contributes to allergic protection in IUGR, and why maternal asthma during pregnancy is associated with increased risks of allergic disease in children. We found that experimental intrauterine growth restriction (IUGR) in sheep reduced cutaneous responses to antigens in progeny, despite normal or elevated IgE responses. Furthermore, maternal methyl donor supplementation in late pregnancy partially reversed effects of experimental IUGR, consistent with the proposal that epigenetic pathways underlie some but not all effects of IUGR on allergic susceptibility. Ovine experimental allergic asthma with exacerbations reduces relative fetal size in late gestation, with some changes in immune populations in fetal thymus suggestive of increased activation. Maternal allergic asthma in mice also predisposes progeny to allergy development. In conclusion, these findings in experimental models provide direct evidence that a perturbed environment before birth alters immune system development and postnatal function, and provide opportunities to investigate underlying mechanisms and develop and evaluate interventions.
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Affiliation(s)
- K L Gatford
- Robinson Research Institute, Australia; Adelaide Medical School, Australia.
| | - A L Wooldridge
- Robinson Research Institute, Australia; Adelaide Medical School, Australia; School of Anatomy, Physiology and Human Biology, University of Western Australia, Australia
| | - K L Kind
- Robinson Research Institute, Australia; School of Animal and Veterinary Sciences, University of Adelaide, Australia
| | - R Bischof
- Department of Physiology, Monash University, Australia; Hudson Institute of Medical Research, Melbourne, Australia
| | - V L Clifton
- Robinson Research Institute, Australia; Adelaide Medical School, Australia; Mater Research Institute and Translational Research Institute, University of Queensland, Australia
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20
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Parr CL, Magnus MC, Karlstad Ø, Haugen M, Refsum H, Ueland PM, McCann A, Nafstad P, Håberg SE, Nystad W, London SJ. Maternal Folate Intake during Pregnancy and Childhood Asthma in a Population-based Cohort. Am J Respir Crit Care Med 2017; 195:221-228. [PMID: 27518161 DOI: 10.1164/rccm.201604-0788oc] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
RATIONALE A potential adverse effect of high folate intake during pregnancy on children's asthma development remains controversial. OBJECTIVES To prospectively investigate folate intake from both food and supplements during pregnancy and asthma at age 7 years when the diagnosis is more reliable than at preschool age. METHODS This study included eligible children born 2002-2006 from the Norwegian Mother and Child Cohort Study, a population-based pregnancy cohort, linked to the Norwegian Prescription Database. Current asthma at age 7 was defined by asthma medications dispensed at least twice in the year (1,901 cases; n = 39,846) or by maternal questionnaire report (1,624 cases; n = 28,872). Maternal folate intake was assessed with a food frequency questionnaire validated against plasma folate. We used log-binomial and multinomial regression to calculate adjusted relative risks with 95% confidence intervals. MEASUREMENTS AND MAIN RESULTS Risk of asthma was increased in the highest versus lowest quintile of total folate intake with an adjusted relative risk of 1.23 (95% confidence interval, 1.06-1.44) that was similar for maternally reported asthma. Mothers in the highest quintile had a relatively high intake of food folate (median, 308; interquartile range, 241-366 μg/d) and nearly all took at least 400 μg/d of supplemental folic acid (median, 500; interquartile range, 400-600 μg/d). CONCLUSIONS In this large prospective population-based cohort with essentially complete follow-up, pregnant women taking supplemental folic acid at or above the recommended dose, combined with a diet rich in folate, reach a total folate intake level associated with a slightly increased risk of asthma in children.
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Affiliation(s)
- Christine L Parr
- 1 Department of Mental and Physical Health and.,2 Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina
| | - Maria C Magnus
- 1 Department of Mental and Physical Health and.,3 Medical Research Council Integrative Epidemiology Unit and.,4 School of Social and Community Medicine, University of Bristol, Bristol, United Kingdom
| | | | - Margaretha Haugen
- 5 Department of Exposure and Risk Assessment, Norwegian Institute of Public Health, Oslo, Norway
| | - Helga Refsum
- 6 Institute of Basic Medical Sciences, Department of Nutrition, and
| | - Per M Ueland
- 7 Department of Clinical Science, University of Bergen, Bergen, Norway.,8 Laboratory of Clinical Biochemistry, Haukeland University Hospital, Bergen, Norway; and
| | | | - Per Nafstad
- 1 Department of Mental and Physical Health and.,10 Department of Community Medicine, University of Oslo, Oslo, Norway
| | | | | | - Stephanie J London
- 2 Epidemiology Branch, National Institute of Environmental Health Sciences, National Institutes of Health, Department of Health and Human Services, Research Triangle Park, North Carolina
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21
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Montrose L, Ward TJ, Semmens EO, Cho YH, Brown B, Noonan CW. Dietary intake is associated with respiratory health outcomes and DNA methylation in children with asthma. Allergy Asthma Clin Immunol 2017; 13:12. [PMID: 28261276 PMCID: PMC5327515 DOI: 10.1186/s13223-017-0187-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2016] [Accepted: 02/17/2017] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Asthma is an increasingly common chronic disease among children, and data point toward a complex mechanism involving genetic, environmental and epigenetic factors. Epigenetic modifications such as DNA hypo- or hyper-methylation have been shown to occur in response to environmental exposures including dietary nutrients. METHODS Within the context of the asthma randomized trial of indoor wood smoke (ARTIS) study, we investigated relationships between diet, asthma health measures, and DNA methylation. Asthma health measures included a quality of life instrument, diurnal peak flow variability (dPFV) and forced expiratory volume in the first second (FEV1). Dietary intake was assessed with a food frequency questionnaire. Methylation levels of LINE-1 repetitive element and two promoter CpG sites for interferon gamma (IFNγ, -186 and -54) from buccal cell DNA were measured using pyrosequencing assays. RESULTS Data were collected on 32 children with asthma living in western Montana who were recruited to the ARTIS study. Selenium and several methyl donor dietary nutrients were positively associated with the asthma quality of life measure. Intake of methyl donating nutrients including folate was positively associated LINE-1 methylation and negatively associated with IFNγ CpG-186. Higher levels of LINE-1 methylation were associated with greater dPFV. CONCLUSION We identified several nutrients that were associated with improved quality of life measures among children with asthma. The IFNγ promoter CpG site -186 but not -54 was associated with the intake of selected dietary nutrients. However, in this small population of children with asthma, the IFNγ promoter CpG sites were not associated with respiratory health measures so it remains unclear through which epigenetic mechanism these nutrients are impacting the quality of life measure. These findings add to the evidence that dietary nutrients, particularly foods containing methyl donors, may be important for epigenetic regulation as it pertains to the control of asthma. Trial registration ClincialTrials.gov NCT00807183. Registered 10 December 2008.
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Affiliation(s)
- L Montrose
- School of Public Health, University of Michigan, 1420 Washington Heights, Ann Arbor, MI 48109 USA
| | - T J Ward
- Center for Environmental Health Sciences, University of Montana, 32 Campus Drive-159 Skaggs, Missoula, MT 59812 USA
| | - E O Semmens
- Center for Environmental Health Sciences, University of Montana, 32 Campus Drive-159 Skaggs, Missoula, MT 59812 USA
| | - Y H Cho
- Center for Environmental Health Sciences, University of Montana, 32 Campus Drive-159 Skaggs, Missoula, MT 59812 USA
| | - B Brown
- Department of Health and Human Performance, University of Montana, 32 Campus Drive, Missoula, MT 59812 USA
| | - C W Noonan
- Center for Environmental Health Sciences, University of Montana, 32 Campus Drive-159 Skaggs, Missoula, MT 59812 USA
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22
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Folate Deficiency, Atopy, and Severe Asthma Exacerbations in Puerto Rican Children. Ann Am Thorac Soc 2016; 13:223-30. [PMID: 26561879 DOI: 10.1513/annalsats.201508-549oc] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
BACKGROUND Little is known about folate and atopy or severe asthma exacerbations. We examined whether folate deficiency is associated with number of positive skin tests to allergens or severe asthma exacerbations in a high-risk population and further assessed whether such association is explained or modified by vitamin D status. METHODS Cross-sectional study of 582 children aged 6 to 14 years with (n = 304) and without (n = 278) asthma in San Juan, Puerto Rico. Folate deficiency was defined as plasma folate less than or equal to 20 ng/ml. Our outcomes were the number of positive skin tests to allergens (range, 0-15) in all children and (in children with asthma) one or more severe exacerbations in the previous year. Logistic and negative binomial regression models were used for the multivariate analysis. All multivariate models were adjusted for age, sex, household income, residential proximity to a major road, and (for atopy) case/control status; those for severe exacerbations were also adjusted for use of inhaled corticosteroids and vitamin D insufficiency (a plasma 25[OH]D < 30 ng/ml). MEASUREMENTS AND MAIN RESULTS In a multivariate analysis, folate deficiency was significantly associated with an increased degree of atopy and 2.2 times increased odds of at least one severe asthma exacerbation (95% confidence interval for odds ratio, 1.1-4.6). Compared with children who had normal levels of both folate and vitamin D, those with both folate deficiency and vitamin D insufficiency had nearly eightfold increased odds of one or more severe asthma exacerbation (95% confidence interval for adjusted odds ratio, 2.7-21.6). CONCLUSIONS Folate deficiency is associated with increased degree of atopy and severe asthma exacerbations in school-aged Puerto Ricans. Vitamin D insufficiency may further increase detrimental effects of folate deficiency on severe asthma exacerbations.
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23
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Maternal Folic Acid Supplementation During Pregnancy and Early Childhood Asthma. Epidemiology 2016; 26:934-41. [PMID: 26360371 DOI: 10.1097/ede.0000000000000380] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
BACKGROUND Asthma is one of the most common chronic childhood diseases. While folic acid supplementation around conception helps prevent neural tube defects, an animal model suggests that it may be a risk factor for respiratory diseases, although epidemiologic studies have had conflicting results. We investigated the timing of folic acid-containing prescription filling during pregnancy and child asthma. METHODS In a retrospective cohort study of 104,428 children, born 1996-2005, and their mothers enrolled in Tennessee Medicaid, we investigated the association of filling folic acid-containing prescriptions during pregnancy and childhood asthma at ages 4.5-6 years. We categorized women into exposure groups based on prescription filling centered around the first trimester: no folic acid prescription exposure, exposure in first trimester only, exposure after first trimester, and exposure in first trimester and beyond. We defined asthma using asthma-specific healthcare visits and medication fills. Using logistic regression models, we investigated the relationship adjusting for potential confounders. RESULTS Overall 15% of children had asthma. Compared with children born to women with no folic acid prescription exposure, children born to women with exposures in the first trimester only or first trimester and later had increased relative odds of asthma (adjusted odds ratios = 1.2, 95% confidence interval = 1.1, 1.3, and 1.2, 95% confidence interval = 1.2, 1.3); no association was seen in children born to women exposed after the first trimester. CONCLUSION Timing of folic acid-containing prescription filling during pregnancy was associated with childhood asthma. Our findings contribute to understanding of the role of prenatal nutritional supplements on child respiratory health.
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24
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Affiliation(s)
- D B Peden
- Center for Environmental Medicine, Asthma and Lung Biology & Department of Pediatrics, The School of Medicine, The University of North Carolina, Chapel Hill, NC, USA
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25
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Abstract
PURPOSE OF REVIEW Our objective was to provide an overview and discussion of recent experimental studies, epidemiologic studies, and clinical trials of diet and asthma. We focus on dietary sources and vitamins with antioxidant properties [vitamins (A, C, and E), folate, and omega-3 and omega-6 polyunsaturated fatty acids (n-3 and n-6 PUFAs)]. RECENT FINDINGS Current evidence does not support the use of vitamin A, vitamin C, vitamin E, or PUFAs for the prevention or treatment of asthma or allergies. Current guidelines for prenatal use of folate to prevent neural tube defects should be followed, as there is no evidence of major effects of this practice on asthma or allergies. Consumption of a balanced diet that is rich in sources of antioxidants (e.g. fruits and vegetables) may be beneficial in the primary prevention of asthma. SUMMARY None of the vitamins or nutrients examined is consistently associated with asthma or allergies. In some cases, further studies of the effects of a vitamin or nutrient on specific asthma phenotypes (e.g. vitamin C to prevent viral-induced exacerbations) are warranted. Clinical trials of 'whole diet' interventions to prevent asthma are advisable on the basis of existing evidence.
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Affiliation(s)
- Yueh-Ying Han
- Division of Pediatric Pulmonary Medicine, Allergy and Immunology, Children's Hospital of Pittsburgh of the University of Pittsburgh Medical Center, Pittsburgh, PA
| | - Erick Forno
- Division of Pediatric Pulmonary Medicine, Allergy and Immunology, Children's Hospital of Pittsburgh of the University of Pittsburgh Medical Center, Pittsburgh, PA
| | - Fernando Holguin
- Division of Pediatric Pulmonary Medicine, Allergy and Immunology, Children's Hospital of Pittsburgh of the University of Pittsburgh Medical Center, Pittsburgh, PA
- Division of Pulmonary, Allergy and Critical Care Medicine, Department of Medicine, University of Pittsburgh Medical Center, Pittsburgh, PA
| | - Juan C. Celedón
- Division of Pediatric Pulmonary Medicine, Allergy and Immunology, Children's Hospital of Pittsburgh of the University of Pittsburgh Medical Center, Pittsburgh, PA
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26
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Wang T, Zhang HP, Zhang X, Liang ZA, Ji YL, Wang G. Is Folate Status a Risk Factor for Asthma or Other Allergic Diseases? ALLERGY, ASTHMA & IMMUNOLOGY RESEARCH 2015; 7:538-46. [PMID: 26333700 PMCID: PMC4605926 DOI: 10.4168/aair.2015.7.6.538] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/10/2015] [Revised: 05/03/2015] [Accepted: 05/12/2015] [Indexed: 02/05/2023]
Abstract
PURPOSE It is controversial whether folate status is a risk factor for the development of asthma or other allergic diseases. This study was conducted to investigate whether indirect or direct exposure to folate and impaired folate metabolism, reflected as methylene-tetrahydrofolate reductase (MTHFR) C677T polymorphism, would contribute to the development of asthma and other allergic diseases. METHODS Electronic databases were searched to identify all studies assessing the association between folate status and asthma or other allergic diseases. Two reviewers independently assessed the eligibility of studies and extracted data. The relative risk (RR) or odds ratio (OR) with 95% confidence intervals (CI) was calculated and pooled. RESULTS Twenty-six studies (16 cohort, 7 case-control, and 3 cross-sectional studies) were identified. Maternal folic acid supplementation was not associated with the development of asthma, atopic dermatitis (AD), eczema, and sensitization in the offspring, whereas exposure during early pregnancy was related to wheeze occurrence in the offspring (RR=1.06, 95% CI=[1.02-1.09]). The TT genotype of MTHFR C677T polymorphism was at high risk of asthma (OR=1.41, 95% CI=[1.07-1.86]). CONCLUSIONS It is indicated that maternal folic acid supplementation during early pregnancy may increase the risk of wheeze in early childhood and that the TT genotype of MTHFR C677T polymorphism impairing folic acid metabolism would be at high risk of asthma development. These results might provide additional information for recommendations regarding forced folate consumption or folic acid supplements during pregnancy based on its well-established benefits for the prevention of congenital malformations. However, currently available evidence is of low quality which is needed to further elucidate.
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Affiliation(s)
- Ting Wang
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu 610041, PR China
| | - Hong Ping Zhang
- Pneumology Group, Department of Integrated Traditional Chinese and Western Medicine, State Key Laboratory of Biotherapy of China, West China Hospital, Sichuan University, Chengdu 610041, PR China
| | - Xin Zhang
- Pneumology Group, Department of Integrated Traditional Chinese and Western Medicine, State Key Laboratory of Biotherapy of China, West China Hospital, Sichuan University, Chengdu 610041, PR China
| | - Zong An Liang
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu 610041, PR China
| | - Yu Lin Ji
- Department of Respiratory and Critical Care Medicine, West China Hospital, Sichuan University, Chengdu 610041, PR China
| | - Gang Wang
- Pneumology Group, Department of Integrated Traditional Chinese and Western Medicine, State Key Laboratory of Biotherapy of China, West China Hospital, Sichuan University, Chengdu 610041, PR China.
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27
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Taube C. Bronchial asthma: is personalized therapy on the horizon? ACTA ACUST UNITED AC 2014; 23:246-251. [PMID: 26120534 PMCID: PMC4479476 DOI: 10.1007/s40629-014-0028-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2014] [Accepted: 08/27/2014] [Indexed: 12/22/2022]
Abstract
In the last years there is an increasing trend towards personalized medicine for patients with asthma. This is due to the availability of novel specific therapies. These new compounds are supposed to be used in well-defined patient groups, which are likely to respond to these interventions. In addition to already used anti-IgE, novel monoclonal antibodies such as anti-IL-5 and anti-IL-13 are becoming available. Currently clinical trials are ongoing to identify which patient population will respond to these novel therapies.
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Affiliation(s)
- Christian Taube
- Department of Pulmonology, Leiden University Medical Center, P.O. Box 9600, 2300 RC Leiden, The Netherlands
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28
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Carraro S, Scheltema N, Bont L, Baraldi E. Early-life origins of chronic respiratory diseases: understanding and promoting healthy ageing. Eur Respir J 2014; 44:1682-96. [PMID: 25323240 DOI: 10.1183/09031936.00084114] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
Chronic obstructive respiratory disorders such as asthma and chronic obstructive pulmonary disease often originate early in life. In addition to a genetic predisposition, prenatal and early-life environmental exposures have a persistent impact on respiratory health. Acting during a critical phase of lung development, these factors may change lung structure and metabolism, and may induce maladaptive responses to harmful agents, which will affect the whole lifespan. Some environmental factors, such as exposure to cigarette smoke, type of childbirth and diet, may be modifiable, but it is more difficult to influence other factors, such as preterm birth and early exposure to viruses or allergens. Here, we bring together recent literature to analyse the critical aspects involved in the early stages of lung development, going back to prenatal and perinatal events, and we discuss the mechanisms by which noxious factors encountered early on may have a lifelong impact on respiratory health. We briefly comment on the need for early disease biomarkers and on the possible role of "-omic" technologies in identifying risk profiles predictive of chronic respiratory conditions. Such profiles could guide the ideation of effective preventive strategies and/or targeted early lifestyle or therapeutic interventions.
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Affiliation(s)
- Silvia Carraro
- Women's and Children's Health Dept, University of Padua, Padua, Italy
| | - Nienke Scheltema
- Dept of Pediatrics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Louis Bont
- Dept of Pediatrics, University Medical Center Utrecht, Utrecht, The Netherlands
| | - Eugenio Baraldi
- Women's and Children's Health Dept, University of Padua, Padua, Italy
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29
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Bortolus R, Blom F, Filippini F, van Poppel MNM, Leoncini E, de Smit DJ, Benetollo PP, Cornel MC, de Walle HEK, Mastroiacovo P. Prevention of congenital malformations and other adverse pregnancy outcomes with 4.0 mg of folic acid: community-based randomized clinical trial in Italy and the Netherlands. BMC Pregnancy Childbirth 2014; 14:166. [PMID: 24884885 PMCID: PMC4045958 DOI: 10.1186/1471-2393-14-166] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2014] [Accepted: 04/25/2014] [Indexed: 01/16/2023] Open
Abstract
BACKGROUND In 2010 a Cochrane review confirmed that folic acid (FA) supplementation prevents the first- and second-time occurrence of neural tube defects (NTDs). At present some evidence from observational studies supports the hypothesis that FA supplementation can reduce the risk of all congenital malformations (CMs) or the risk of a specific and selected group of them, namely cardiac defects and oral clefts. Furthermore, the effects on the prevention of prematurity, foetal growth retardation and pre-eclampsia are unclear.Although the most common recommendation is to take 0.4 mg/day, the problem of the most appropriate dose of FA is still open.The aim of this project is to assess the effect a higher dose of peri-conceptional FA supplementation on reducing the occurrence of all CMs. Other aims include the promotion of pre-conceptional counselling, comparing rates of selected CMs, miscarriage, pre-eclampsia, preterm birth, small for gestational age, abruptio placentae. METHODS/DESIGN This project is a joint effort by research groups in Italy and the Netherlands. Women of childbearing age, who intend to become pregnant within 12 months are eligible for the studies. Women are randomly assigned to receive 4 mg of FA (treatment in study) or 0.4 mg of FA (referent treatment) daily. Information on pregnancy outcomes are derived from women-and-physician information.We foresee to analyze the data considering all the adverse outcomes of pregnancy taken together in a global end point (e.g.: CMs, miscarriage, pre-eclampsia, preterm birth, small for gestational age). A total of about 1,000 pregnancies need to be evaluated to detect an absolute reduction of the frequency of 8%. Since the sample size needed for studying outcomes separately is large, this project also promotes an international prospective meta-analysis. DISCUSSION The rationale of these randomized clinical trials (RCTs) is the hypothesis that a higher intake of FA is related to a higher risk reduction of NTDs, other CMs and other adverse pregnancy outcomes. Our hope is that these trials will act as catalysers, and lead to other large RCTs studying the effects of this supplementation on CMs and other infant and maternal outcomes. TRIAL REGISTRATION Italian trial: ClinicalTrials.gov Identifier: NCT01244347.Dutch trial: Dutch Trial Register ID: NTR3161.
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Affiliation(s)
- Renata Bortolus
- Office for Research Promotion, Department of the Hospital Management and Pharmacy, Verona University Hospital, P.le A. Stefani, 1-37126 Verona, Italy
| | - Fenneke Blom
- Community Genetics, Department of Clinical Genetics, EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, the Netherlands
| | - Francesca Filippini
- Office for Research Promotion, Department of the Hospital Management and Pharmacy, Verona University Hospital, P.le A. Stefani, 1-37126 Verona, Italy
| | - Mireille NM van Poppel
- Department of Public and Occupational Health, EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, the Netherlands
| | - Emanuele Leoncini
- Alessandra Lisi International Centre on Birth Defects and Prematurity-ICBD, WHO Collaborating Centre, Rome, Italy
| | | | | | - Martina C Cornel
- Community Genetics, Department of Clinical Genetics, EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, the Netherlands
| | - Hermien EK de Walle
- Department of Genetics, University Medical Center Groningen, University of Groningen, Groningen, the Netherlands
| | - Pierpaolo Mastroiacovo
- Alessandra Lisi International Centre on Birth Defects and Prematurity-ICBD, WHO Collaborating Centre, Rome, Italy
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30
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Sharma S, Litonjua A. Asthma, allergy, and responses to methyl donor supplements and nutrients. J Allergy Clin Immunol 2014; 133:1246-54. [PMID: 24360248 PMCID: PMC4004707 DOI: 10.1016/j.jaci.2013.10.039] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2013] [Revised: 10/17/2013] [Accepted: 10/22/2013] [Indexed: 01/14/2023]
Abstract
After a brief period of stabilization, recent data have shown that the prevalence of asthma and allergic diseases continues to increase. Atopic diseases are major public health problems resulting in significant disability and resource use globally. Although environmental factors influence the development of atopic disease, dietary changes might partially explain the high burden of atopic disease. Potential mechanisms through which diet is suspected to effect asthma and allergy susceptibility are through epigenetic changes, including DNA methylation. Dietary methyl donors are important in the one-carbon metabolic pathway that is essential for DNA methylation. Findings from both observational studies and interventional trials of dietary methyl donor supplementation on the development and treatment of asthma and allergy have produced mixed results. Although issues related to the differences in study design partially explain the heterogeneous results, 2 other issues have been largely overlooked in these studies. First, these nutrients affect one of many pathways and occur in many of the same foods. Second, it is now becoming clear that the human intestinal microbiome is involved in the metabolism and production of the B vitamins and other methyl donor nutrients. Future studies will need to account for both the interrelationships between these nutrients and the effects of the microbiome.
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Affiliation(s)
- Sunita Sharma
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, Mass; Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Mass.
| | - Augusto Litonjua
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, and Harvard Medical School, Boston, Mass; Division of Pulmonary and Critical Care Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, Mass
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31
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Veeranki SP, Gebretsadik T, Dorris SL, Mitchel EF, Hartert TV, Cooper WO, Tylavsky FA, Dupont W, Hartman TJ, Carroll KN. Association of folic acid supplementation during pregnancy and infant bronchiolitis. Am J Epidemiol 2014; 179:938-46. [PMID: 24671071 DOI: 10.1093/aje/kwu019] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Viral bronchiolitis affects 20%-30% of infants; because there is no known effective treatment, it is important to identify risk factors that contribute to its pathogenesis. Although adequate folate intake during the periconceptional period prevents neural tube defects, animal data suggest that higher supplementation may be a risk factor for child respiratory diseases. Using a population-based retrospective cohort of 167,333 women and infants, born in 1995-2007 and enrolled in the Tennessee Medicaid program, we investigated the association between the filling of folic acid-containing prescriptions and infant bronchiolitis. We categorized women into the following 4 groups in relation to the first trimester: "none" (no prescription filled), "first trimester only," "after first trimester," and "both" (prescriptions filled both during and after the first trimester). Overall, 21% of infants had a bronchiolitis diagnosis, and 5% were hospitalized. Most women filled their first prescriptions after the fifth to sixth weeks of pregnancy, and most prescriptions contained 1,000 µg of folic acid. Compared with infants born to women in the "none" group, infants born to women in the "first trimester only" group had higher relative odds of bronchiolitis diagnosis (adjusted odds ratio = 1.17, 95% confidence interval: 1.11, 1.22) and greater severity (adjusted odds ratio = 1.16, 95% confidence interval: 1.11, 1.22). This study's findings contribute to an understanding of the implications of prenatal nutritional supplement recommendations for infant bronchiolitis.
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32
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Sharma S, Chhabra D, Kho AT, Hayden LP, Tantisira KG, Weiss ST. The genomic origins of asthma. Thorax 2014; 69:481-7. [PMID: 24668408 DOI: 10.1136/thoraxjnl-2014-205166] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Lung function tracks from the earliest age that it can be reliably measured. Genome wide association studies suggest that most variants identified for common complex traits are regulatory in function and active during fetal development. Fetal programming of gene expression during development is critical to the formation of a normal lung. An understanding of how fetal developmental genes related to diseases of the lungs and airways is a critical area for research. This review article considers the developmental origins hypothesis, the stages of normal lung development and a variety of environmental exposures that might influence the developmental process: in utero cigarette smoke exposure, vitamin D and folate. We conclude with some information on developmental genes and asthma.
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Affiliation(s)
- Sunita Sharma
- Channing Division of Network Medicine, Brigham and Women's Hospital, , Boston, Massachusetts, USA
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