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Mijač S, Banić I, Genc AM, Lipej M, Turkalj M. The Effects of Environmental Exposure on Epigenetic Modifications in Allergic Diseases. MEDICINA (KAUNAS, LITHUANIA) 2024; 60:110. [PMID: 38256371 PMCID: PMC10820670 DOI: 10.3390/medicina60010110] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2023] [Revised: 12/27/2023] [Accepted: 01/05/2024] [Indexed: 01/24/2024]
Abstract
Allergic diseases are one of the most common chronic conditions and their prevalence is on the rise. Environmental exposure, primarily prenatal and early life influences, affect the risk for the development and specific phenotypes of allergic diseases via epigenetic mechanisms. Exposure to pollutants, microorganisms and parasites, tobacco smoke and certain aspects of diet are known to drive epigenetic changes that are essential for immune regulation (e.g., the shift toward T helper 2-Th2 cell polarization and decrease in regulatory T-cell (Treg) differentiation). DNA methylation and histone modifications can modify immune programming related to either pro-allergic interleukin 4 (IL-4), interleukin 13 (IL-13) or counter-regulatory interferon γ (IFN-γ) production. Differential expression of small non-coding RNAs has also been linked to the risk for allergic diseases and associated with air pollution. Certain exposures and associated epigenetic mechanisms play a role in the susceptibility to allergic conditions and specific clinical manifestations of the disease, while others are thought to have a protective role against the development of allergic diseases, such as maternal and early postnatal microbial diversity, maternal helminth infections and dietary supplementation with polyunsaturated fatty acids and vitamin D. Epigenetic mechanisms are also known to be involved in mediating the response to common treatment in allergic diseases, for example, changes in histone acetylation of proinflammatory genes and in the expression of certain microRNAs are associated with the response to inhaled corticosteroids in asthma. Gaining better insight into the epigenetic regulation of allergic diseases may ultimately lead to significant improvements in the management of these conditions, earlier and more precise diagnostics, optimization of current treatment regimes, and the implementation of novel therapeutic options and prevention strategies in the near future.
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Affiliation(s)
- Sandra Mijač
- Department of Medical Research, Srebrnjak Children’s Hospital, Srebrnjak 100, HR-10000 Zagreb, Croatia; (S.M.); (A.-M.G.)
| | - Ivana Banić
- Department of Medical Research, Srebrnjak Children’s Hospital, Srebrnjak 100, HR-10000 Zagreb, Croatia; (S.M.); (A.-M.G.)
- Department of Innovative Diagnostics, Srebrnjak Children’s Hospital, Srebrnjak 100, HR-10000 Zagreb, Croatia
| | - Ana-Marija Genc
- Department of Medical Research, Srebrnjak Children’s Hospital, Srebrnjak 100, HR-10000 Zagreb, Croatia; (S.M.); (A.-M.G.)
| | - Marcel Lipej
- IT Department, Srebrnjak Children’s Hospital, Srebrnjak 100, HR-10000 Zagreb, Croatia;
| | - Mirjana Turkalj
- Department of Pediatric Allergy and Pulmonology, Srebrnjak Children’s Hospital, Srebrnjak 100, HR-10000 Zagreb, Croatia;
- Faculty of Medicine, J.J. Strossmayer University of Osijek, J. Huttlera 4, HR-31000 Osijek, Croatia
- Faculty of Medicine, Catholic University of Croatia, Ilica 242, HR-10000 Zagreb, Croatia
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Zhong Z, Chen M, Dai S, Wang Y, Yao J, Shentu H, Huang J, Yu C, Zhang H, Wang T, Ren W. Association of cesarean section with asthma in children/adolescents: a systematic review and meta-analysis based on cohort studies. BMC Pediatr 2023; 23:571. [PMID: 37974127 PMCID: PMC10652517 DOI: 10.1186/s12887-023-04396-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Accepted: 10/29/2023] [Indexed: 11/19/2023] Open
Abstract
BACKGROUND Whether cesarean section (CS) is a risk factor for asthma in offspring is controversial. The purpose of this study was to investigate the association between CS and asthma in children/adolescents. METHODS Pubmed, Embase, Web of Science, and Cochrane Library electronic databases were searched for cohort studies on the relationship between mode of delivery and asthma in children/adolescents up to February 2023. Birth via CS was considered an exposure factor. Asthma incidence was taken as a result. RESULTS Thirty-five cohort studies (thirteen prospective and twenty-two retrospective cohort studies) were included. The results showed that the incidence of asthma was higher in CS offspring (odds ratio (OR) = 1.18, P < 0.001) than in the vaginal delivery (VD) group. Partial subgroup analyses showed a higher incidence of asthma in female offspring born via CS (OR = 1.26, P < 0.001) compared with the VD group, while there was no difference in males (OR = 1.07, P = 0.325). Asthma incidence was higher in CS offspring than in the VD group in Europe (OR = 1.20, P < 0.001), North America (OR = 1.15, P < 0.001), and Oceania (OR = 1.06, P = 0.008). This trend was not found in the Asian population (OR = 1.17, P = 0.102). The incidence of atopic asthma was higher in offspring born via CS (OR = 1.14, P < 0.001) compared to the VD group. The CS group had a higher incidence of persistent asthma, but the difference did not reach statistical significance (OR = 1.15, P = 0.063). CONCLUSION In this meta-analysis, CS may be a risk factor for asthma in offspring children/adolescents compared with VD. The relationship between CS and asthma was influenced by sex and region.
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Affiliation(s)
- Ziwei Zhong
- Emergency Medical Center, Ningbo Yinzhou No. 2 Hospital, Ningbo, Zhejiang, China
| | - Meiling Chen
- The Public Health College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Senjie Dai
- The Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Yu Wang
- College of Pharmacy, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Jie Yao
- The Public Health College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Haojie Shentu
- The Medical Imaging College, Hangzhou Medical College, Hangzhou, Zhejiang, China
| | - Jianing Huang
- The Public Health College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Chiyuan Yu
- The Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Hongrui Zhang
- The Medical Technology and Information Engineering College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Tianyue Wang
- The Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, Zhejiang, China
| | - Wei Ren
- General Family Medicine, Ningbo Yinzhou No. 2 Hospital, 998 North Qianhe Road, Yinzhou District, Ningbo, 315100, Zhejiang, China.
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Bai J, Tang L, Luo Y, Han Z, Li C, Sun Y, Sun Q, Lu J, Qiu H, Zhao Z, Huo T, Xiong W, Zhang Q. Vitamin B complex blocks the dust fall PM 2 .5 -induced acute lung injury through DNA methylation in rats. ENVIRONMENTAL TOXICOLOGY 2023; 38:403-414. [PMID: 36282901 DOI: 10.1002/tox.23689] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/30/2022] [Revised: 10/09/2022] [Accepted: 10/13/2022] [Indexed: 06/16/2023]
Abstract
This study aimed to explore whether vitamin B complex (folic acid, B6 , and B12 ) could avert DNA methylation changes associated with inflammation induced by acute PM2.5 exposure. Sprague-Dawley rats were administered by gavage with different concentrations of vitamin B complex once a day for 28 days, and then by intratracheal instillation with saline or PM2.5 once every 2 days for three times. Vitamin B continued to be taken during the PM2.5 exposure. Rats were sacrificed 24 h after the last exposure. The results showed that vitamin B complex could block the pathological changes and injury in lungs induced by PM2.5 . Meanwhile, vitamin B complex could prevent the abnormal DNA methylation of IL-4 and IFN-γ to antagonize the imbalance of IL-4/IFN-γ associated with inflammation. It was further found that vitamin B complex could regulate DNA methyltransferases (DNMTs) and increase the S-adenosylmethionine (SAM)/S-Adenosyl-L-homocysteine (SAH) ratio to reverse the hypomethylation of genomic DNA and the abnormal DNA methylation of IL-4 and IFN-γ. In conclusion, vitamin B complex has a protective effect on acute lung injury by attenuating abnormal DNA methylation induced by PM2.5 in rats. This study may provide a new insight into the physiological function of vitamin B to prevent the health effects induced by PM2.5 .
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Affiliation(s)
- Jun Bai
- School of Public Health, Southwest Medical University, Luzhou, China
| | - Lanlan Tang
- School of Public Health, Southwest Medical University, Luzhou, China
- Chengdu Jintang Municipal Center for Disease Control and Prevention, Chengdu, China
| | - Yajun Luo
- School of Public Health, Southwest Medical University, Luzhou, China
| | - Zhixia Han
- School of Public Health, Southwest Medical University, Luzhou, China
| | - Chenwen Li
- School of Public Health, Southwest Medical University, Luzhou, China
| | - Yaochuan Sun
- State Key Laboratory of Coal Mine Disaster Dynamics and Control, Chongqing University, Chongqing, China
| | - Qian Sun
- Luzhou Ecological Environment Monitoring Center of Sichuan Province, Luzhou, China
| | - Ji Lu
- School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Hao Qiu
- School of Pharmacy, Southwest Medical University, Luzhou, China
| | - Zhenhu Zhao
- School of Public Health, Southwest Medical University, Luzhou, China
| | - Tingting Huo
- School of Environmental and Resource, Southwest University of Science and Technology, Mianyang, China
| | - Wei Xiong
- School of Public Health, Southwest Medical University, Luzhou, China
| | - Qingbi Zhang
- School of Public Health, Southwest Medical University, Luzhou, China
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Chen X, Lin L, Huang L, Wu M, Tan T, Li Q, Zhong C, Wang H, Wang W, Sun G, Yi N, Yang X, Hao L, Yang H, Yang N. Association of maternal low-carbohydrate-diet score during pregnancy with allergic diseases at 2 years of age. Pediatr Allergy Immunol 2022; 33:e13842. [PMID: 36156822 DOI: 10.1111/pai.13842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 07/22/2022] [Accepted: 08/12/2022] [Indexed: 11/30/2022]
Abstract
BACKGROUND We prospectively evaluated the association between low-carbohydrate-diet (LCD) score during pregnancy and the risk of allergic diseases in infants up to 2 years. METHODS Participants were from a prospective mother-offspring cohort study in Wuhan, China. LCD score was calculated according to the percentage of dietary energy intake from carbohydrate, protein, and fat assessed in late pregnancy using validated food frequency questionnaires. Allergic diseases, including immunoglobulin E (IgE)-mediated allergic diseases, allergic contact dermatitis, and food allergy, were recorded at 3, 6, 12, and 24 months postpartum follow-up. Poisson regression models were used to calculate relative risks (RRs) and 95% confidence intervals (CIs). RESULTS Among 1636 mother-infant pairs included in the present analysis, 230 infants (14.1%) with IgE-mediated allergic diseases, 77 (4.7%) with allergic contact dermatitis, and 488 (29.8%) with food allergy were, respectively, reported. Independent of total energy intake and other potential confounders, both the lowest quintile (RR, 1.77; 95% CI, 1.13-2.77) and the highest quintile (RR, 1.72; 95% CI, 1.22-2.63), were associated with the risk of IgE-mediated allergic diseases compared with the middle quintile. Among high-carbohydrate-diet pregnant women, substituting 5% of energy from either protein or fat for carbohydrate was associated with a lower risk of IgE-mediated allergic diseases. While among low-carbohydrate-diet pregnant women, substituting 5% of energy from carbohydrate, especially high-quality carbohydrate, for fat was associated with a lower risk of IgE-mediated allergic diseases. CONCLUSION Maternal low carbohydrate-high protein and fat, and high carbohydrate-low protein and fat diet were both associated with an increased risk of allergic diseases in the infants up to 2 years. This study may provide an intervention strategy for allergy prevention in early childhood.
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Affiliation(s)
- Xi Chen
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Lixia Lin
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Li Huang
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Meng Wu
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Tianqi Tan
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qian Li
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Chunrong Zhong
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Huanzhuo Wang
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Weiming Wang
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Guoqiang Sun
- Maternal and Child Health Hospital of Hubei Province, Wuhan, China
| | - Nianhua Yi
- Maternal and Child Health Hospital of Hubei Province, Wuhan, China
| | - Xuefeng Yang
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Liping Hao
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Hongying Yang
- Institute of Health Education, Hubei Provincial Center for Disease Control and Prevention, Wuhan, China
| | - Nianhong Yang
- Department of Nutrition and Food Hygiene, Hubei Key Laboratory of Food Nutrition and Safety, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Ministry of Education Key Laboratory of Environment and Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
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5
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Cahill KM, Johnson TK, Perveen Z, Schexnayder M, Xiao R, Heffernan LM, Langohr IM, Paulsen DB, Penn AL, Noël A. In utero exposures to mint-flavored JUUL aerosol impair lung development and aggravate house dust mite-induced asthma in adult offspring mice. Toxicology 2022; 477:153272. [PMID: 35878681 DOI: 10.1016/j.tox.2022.153272] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 07/04/2022] [Accepted: 07/21/2022] [Indexed: 11/18/2022]
Abstract
There are few reports concerning electronic nicotine delivery system (ENDS) use during pregnancy and no studies on asthma in prenatally JUUL-exposed offspring. Here, we tested the hypothesis that in utero JUUL exposure causes unfavorable birth outcomes and lasting pulmonary health effects in adult offspring. BALB/c dams were exposed to either air or mint-flavored JUUL aerosol, 1-hr/d, 20 consecutive days during gestation. Offspring were sacrificed on post-natal day (PND) 0 or at 11-week of age, following house dust mite (HDM) challenge. Gene expression was assessed in the uterine/placental tissue of the dams and lung responses were assessed in offspring at PND0 and at 11 weeks of age. JUUL-exposed offspring exhibited decreased body weights and lengths at PND0. These birth outcomes were accompanied by dysregulation of 54 genes associated with hypoxia and oxidative stress in the uterine/placental tissues of JUUL-exposed dams, as well as 24 genes in the lungs of the offspring related to Wnt signaling, plus 9 genes related to epigenetics, and 7 genes related to inflammation. At 11 weeks of age, JUUL + HDM exposed mice exhibited pulmonary inflammation when compared to their respective air + HDM controls. Additionally, the JUUL + HDM exposure dysregulated several genes associated with allergies and asthma. Further, the JUUL + HDM females showed decreased methylation of the promoter region of the Il10ra gene. Taken together, our mouse model shows that inhalation of JUUL aerosols during pregnancy affects the intrauterine environment, impairs lung development, and heightens the effects of allergic airway responses later in life.
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Affiliation(s)
- Kerin M Cahill
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Trenton K Johnson
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Zakia Perveen
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Matthew Schexnayder
- Lincoln Memorial University, College of Veterinary Medicine, 6965 Cumberland Gap Parkway, Harrogate, TN, USA
| | - Rui Xiao
- Department of Anesthesiology, Columbia University Medical Center, 630 West 168th Street, New York, NY 10032, USA
| | - Linda M Heffernan
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Ingeborg M Langohr
- Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Daniel B Paulsen
- Department of Pathobiological Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Arthur L Penn
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Alexandra Noël
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA.
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Ruan F, Zhang J, Liu J, Sun X, Li Y, Xu S, Xia W. Association between prenatal exposure to metal mixtures and early childhood allergic diseases. ENVIRONMENTAL RESEARCH 2022; 206:112615. [PMID: 34968434 DOI: 10.1016/j.envres.2021.112615] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 12/19/2021] [Accepted: 12/20/2021] [Indexed: 06/14/2023]
Abstract
The association between prenatal exposure to the metal mixture and allergic diseases is poorly understood. We aimed to explore the individual effect and the combined effect of prenatal exposure to vanadium (V), chromium (Cr), nickel (Ni), arsenic (As), cadmium (Cd), thallium (Tl), and lead (Pb) on early childhood allergic diseases based on a birth cohort study that included 628 mother-infant pairs. Metals were measured in maternal urine samples collected in the first, second, and third trimesters. Children were prospectively followed up at age 4 years to collect information on allergic rhinitis, wheeze, and eczema status. By applying logistic regression models, weighted quantile sum (WQS) regression, and Bayesian kernel machine regression (BKMR), the different statistical analyses revealed urinary metals were only associated with early childhood allergic rhinitis. The averaged prenatal As exposure was significantly associated with an increased OR for allergic rhinitis in both single-metal (OR = 2.04, 95% CI: 1.35, 3.07) and multiple-metal logistic regression models (OR = 1.78, 95% CI: 1.15, 2.78). The WQS index of mixed metal exposure was positively associated with allergic rhinitis (OR = 1.66, 95% CI: 1.26, 2.19), and As and Tl had the largest weights in the WQS index (weighted 0.51 and 0.29, respectively). The BKMR analysis also showed the overall effect of the metal mixture was significantly associated with allergic rhinitis when all the metals were at their 55th percentile or above, compared to their 50th percentile. The effect of As and Tl on the risk of allergic rhinitis was significant when all of the other metals were fixed at the specific percentiles. Our findings suggest that prenatal co-exposure to higher levels of the seven metals increases the risk of allergic rhinitis in children, and As and Tl may contribute most to the combined risk.
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Affiliation(s)
- Fengyu Ruan
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Jingjing Zhang
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Juan Liu
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Xiaojie Sun
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Yuanyuan Li
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Shunqing Xu
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China
| | - Wei Xia
- Key Laboratory of Environment and Health, Ministry of Education & Ministry of Environmental Protection, and State Key Laboratory of Environmental Health, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, People's Republic of China.
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7
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Moroishi Y, Signes-Pastor AJ, Li Z, Cottingham KL, Jackson BP, Punshon T, Madan J, Nadeau K, Gui J, Karagas MR. Infant infections, respiratory symptoms, and allergy in relation to timing of rice cereal introduction in a United States cohort. Sci Rep 2022; 12:4450. [PMID: 35292690 PMCID: PMC8924265 DOI: 10.1038/s41598-022-08354-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2020] [Accepted: 02/28/2022] [Indexed: 01/03/2023] Open
Abstract
Rice products marketed in the USA, including baby rice cereal, contain inorganic arsenic, a putative immunotoxin. We sought to determine whether the timing of introduction of rice cereal in the first year of life influences occurrence of infections, respiratory symptoms, and allergy. Among 572 infants from the New Hampshire Birth Cohort Study, we used generalized estimating equation, adjusted for maternal smoking during pregnancy, marital status, education attainment, pre-pregnancy body mass index, maternal age at enrollment, infant birth weight, and breastfeeding history. Among 572 infants, each month earlier of introduction to rice cereal was associated with increased risks of subsequent upper respiratory tract infections (relative risk, RR = 1.04; 95% CI: 1.00-1.09); lower respiratory tract infections (RR = 1.19; 95% CI: 1.02-1.39); acute respiratory symptoms including wheeze, difficulty breathing, and cough (RR = 1.10; 95% CI: 1.00-1.22); fever requiring a prescription medicine (RR = 1.22; 95% CI: 1.02-1.45) and allergy diagnosed by a physician (RR = 1.20; 95% CI: 1.06-1.36). No clear associations were observed with gastrointestinal symptoms. Our findings suggest that introduction of rice cereal earlier may influence infants' susceptibility to respiratory infections and allergy.
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Affiliation(s)
- Yuka Moroishi
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Hanover, NH, USA
- Department of Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, NH, USA
| | | | - Zhigang Li
- Department of Biostatistics, University of Florida, Gainesville, FL, USA
| | - Kathryn L Cottingham
- Department of Biological Sciences, Dartmouth College, Hanover, NH, USA
- Children's Environmental Health and Disease Prevention Research Center at Dartmouth, Hanover, NH, USA
| | - Brian P Jackson
- Department of Earth Sciences, Dartmouth College, Hanover, NH, USA
| | - Tracy Punshon
- Department of Biological Sciences, Dartmouth College, Hanover, NH, USA
- Children's Environmental Health and Disease Prevention Research Center at Dartmouth, Hanover, NH, USA
| | - Juliette Madan
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Hanover, NH, USA
- Children's Environmental Health and Disease Prevention Research Center at Dartmouth, Hanover, NH, USA
- Department of Pediatrics, Children's Hospital at Dartmouth, Lebanon, NH, USA
| | - Kari Nadeau
- Sean N. Parker Center for Allergy and Asthma Research, Stanford University School of Medicine, Stanford, CA, USA
| | - Jiang Gui
- Department of Biomedical Data Science, Geisel School of Medicine at Dartmouth, Hanover, NH, USA
| | - Margaret R Karagas
- Department of Epidemiology, Geisel School of Medicine at Dartmouth, Hanover, NH, USA.
- Children's Environmental Health and Disease Prevention Research Center at Dartmouth, Hanover, NH, USA.
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8
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Ali A, Hamzaid NH, Ismail NAS. The Interplay of Nutriepigenomics, Personalized Nutrition and Clinical Practice in Managing Food Allergy. Life (Basel) 2021; 11:1275. [PMID: 34833150 PMCID: PMC8623511 DOI: 10.3390/life11111275] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2021] [Revised: 10/25/2021] [Accepted: 11/05/2021] [Indexed: 11/16/2022] Open
Abstract
Food allergy in children has been a common issue due to the challenges of prescribing personalized nutrition with a lack of nutriepigenomics data. This has indeed further influenced clinical practice for appropriate management. While allergen avoidance is still the main principle in food allergy management, we require more information to advance the science behind nutrition, genes, and the immune system. Many researchers have highlighted the importance of personalized nutrition but there is a lack of data on how the decision is made. Thus, this review highlights the relationship among these key players in identifying the solution to the clinical management of food allergy with current nutriepigenomics data. The discussion integrates various inputs, including clinical assessments, biomarkers, and epigenetic information pertaining to food allergy, to curate a holistic and personalized approach to food allergy management in particular.
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Affiliation(s)
- Adli Ali
- Department of Pediatrics, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia;
| | - Nur Hana Hamzaid
- Dietetic Program & Centre for Rehabilitation and Special Needs Studies (iCaRehab), Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Kuala Lumpur 50300, Malaysia;
| | - Noor Akmal Shareela Ismail
- Department of Biochemistry, Faculty of Medicine, Universiti Kebangsaan Malaysia, Kuala Lumpur 56000, Malaysia
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9
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Tsai TL, Wang SL, Hsieh CJ, Wen HJ, Kuo CC, Liu HJ, Sun CW, Chen ML, Wu MT. Association Between Prenatal Exposure to Metals and Atopic Dermatitis Among Children Aged 4 Years in Taiwan. JAMA Netw Open 2021; 4:e2131327. [PMID: 34705012 PMCID: PMC8552055 DOI: 10.1001/jamanetworkopen.2021.31327] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/20/2023] Open
Abstract
IMPORTANCE The prevalence of atopic dermatitis has substantially increased in recent decades, and atopic dermatitis could lead to allergic airway inflammation later in life. A previous study found that inorganic arsenic exposure was associated with allergic airway inflammation in children aged 8 to 14 years. However, the association between prenatal exposure to arsenic and other metals and the risk of atopic dermatitis among young children remains unknown. OBJECTIVE To assess the association between prenatal exposure to arsenic and other metals and the occurrence of atopic dermatitis in children at age 4 years. DESIGN, SETTING, AND PARTICIPANTS In total, 1152 pregnant women were enrolled in the original Taiwan Maternal and Infant Cohort Study (TMICS), a multicenter birth cohort study conducted at 9 hospitals in northern, central, southern, and eastern Taiwan from October 2012 to May 2015. Of those, 586 mothers and children aged 4 years participated in follow-up questionnaire interviews from August 2016 to January 2019. After excluding 216 participants with missing data, the final statistical analysis of follow-up data included 370 mother and child pairs from the central and eastern regions of Taiwan. Data were analyzed from February 2 to August 12, 2021. EXPOSURES Arsenic, cadmium, lead, cobalt, copper, nickel, thallium, and zinc during pregnancy. MAIN OUTCOMES AND MEASURES The outcome was parent-reported atopic dermatitis history among children aged 4 years. The presence of atopic dermatitis was defined as a positive response to the question, "Has your child ever had atopic dermatitis diagnosed by a physician?" During the initial TMICS study period, concentrations of arsenic, cadmium, lead, cobalt, copper, nickel, thallium, and zinc were measured in maternal urine during the third trimester of pregnancy using an inductively coupled plasma mass spectrometer. Estimated total inorganic arsenic exposure was calculated using a model that included data on both total arsenic and arsenic species (arsenite, arsenate, monomethylarsonate, and dimethylarsenate) obtained from a previous TMICS cohort. RESULTS Among 370 children included in the analysis, the mean (SD) age was 3.94 (0.59) years; 208 children (56.2%) were male, and 267 children (72.2%) were from the central region of Taiwan. A total of 110 children (29.7%) had atopic dermatitis at age 4 years. Maternal estimated total inorganic arsenic exposure during pregnancy was associated with increased odds of atopic dermatitis among children at age 4 years (odds ratio [OR], 2.42 [95% CI, 1.33-4.39] for every doubled increase of total inorganic arsenic) after adjusting for parental allergies, child's sex, geographic area, maternal educational level, and exposure to tobacco smoke. Every increased unit in the weighted quantile sum index of maternal metal exposure was significantly associated with atopic dermatitis (OR, 1.63; 95% CI, 1.28-2.07). Arsenic (40.1%) and cadmium (20.5%) accounted for most of the metal mixture index. CONCLUSIONS AND RELEVANCE This cohort study found that prenatal exposure to inorganic arsenic and coexposure to inorganic arsenic and cadmium were associated with a higher risk of atopic dermatitis in young children. These findings suggest that prevention of exposure to inorganic arsenic and cadmium during pregnancy may be helpful for the control of atopic dermatitis and other potential allergies in children.
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Affiliation(s)
- Tsung-Lin Tsai
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
- Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan
- Department of Healthcare Administration, Asia University, Taichung, Taiwan
| | - Shu-Li Wang
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
- Graduate Institute of Life Science, National Defense Medical Center, Taipei, Taiwan
- Department of Safety, Health, and Environmental Engineering, National United University, Miaoli, Taiwan
| | - Chia-Jung Hsieh
- Department of Public Health, Tzu Chi University, Hualien, Taiwan
| | - Hui-Ju Wen
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Chin-Chi Kuo
- Big Data Center, China Medical University Hospital, Taichung, Taiwan
- Division of Nephrology, Department of Internal Medicine, China Medical University Hospital, Taichung, Taiwan
| | - Huei-Ju Liu
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Chien-Wen Sun
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan
| | - Mei-Lien Chen
- Institute of Environmental and Occupational Health Sciences, College of Medicine, National Yang Ming Chiao Tung University, Taipei, Taiwan
| | - Ming-Tsang Wu
- Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan
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10
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Murphy DM, Mills KHG, Basdeo SA. The Effects of Trained Innate Immunity on T Cell Responses; Clinical Implications and Knowledge Gaps for Future Research. Front Immunol 2021; 12:706583. [PMID: 34489958 PMCID: PMC8417102 DOI: 10.3389/fimmu.2021.706583] [Citation(s) in RCA: 22] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2021] [Accepted: 07/30/2021] [Indexed: 12/16/2022] Open
Abstract
The burgeoning field of innate immune training, also called trained immunity, has given immunologists new insights into the role of innate responses in protection against infection and in modulating inflammation. Moreover, it has led to a paradigm shift in the way we think about immune memory and the interplay between innate and adaptive immune systems in conferring immunity against pathogens. Trained immunity is the term used to describe the medium-term epigenetic and metabolic reprogramming of innate immune cells in peripheral tissues or in the bone marrow stem cell niche. It is elicited by an initial challenge, followed by a significant period of rest that results in an altered response to a subsequent, unrelated challenge. Trained immunity can be associated with increased production of proinflammatory mediators, such as IL-1β, TNF and IL-6, and increased expression of markers on innate immune cells associated with antigen presentation to T cells. The microenvironment created by trained innate immune cells during the secondary challenge may have profound effects on T cell responses, such as altering the differentiation, polarisation and function of T cell subtypes, including Th17 cells. In addition, the Th1 cytokine IFN-γ plays a critical role in establishing trained immunity. In this review, we discuss the evidence that trained immunity impacts on or can be impacted by T cells. Understanding the interplay between innate immune training and how it effects adaptive immunity will give insights into how this phenomenon may affect the development or progression of disease and how it could be exploited for therapeutic interventions or to enhance vaccine efficacy.
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Affiliation(s)
- Dearbhla M Murphy
- Human and Translational Immunology Group, Department of Clinical Medicine, Trinity Translational Medicine Institute, St James's Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Kingston H G Mills
- Immune Regulation Research Group, School of Biochemistry and Immunology, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, Dublin, Ireland
| | - Sharee A Basdeo
- Human and Translational Immunology Group, Department of Clinical Medicine, Trinity Translational Medicine Institute, St James's Hospital, Trinity College Dublin, The University of Dublin, Dublin, Ireland
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11
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Kohno C, Kaneko K, Takahashi K, Ohya Y, Nakajima H, Murashima A. Intrauterine exposure to immunosuppressants influences the development of postnatal allergic diseases. Allergy 2021; 76:2890-2893. [PMID: 33905116 DOI: 10.1111/all.14878] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2021] [Revised: 03/26/2021] [Accepted: 04/13/2021] [Indexed: 11/29/2022]
Affiliation(s)
- Chie Kohno
- Division of Maternal Medicine Center for Maternal‐Fetal, Neonatal and Reproductive Medicine National Center for Child Health and Development Tokyo Japan
- Department of Allergy and Clinical Immunology Graduate School of Medicine Chiba University Chiba Japan
| | - Kayoko Kaneko
- Division of Maternal Medicine Center for Maternal‐Fetal, Neonatal and Reproductive Medicine National Center for Child Health and Development Tokyo Japan
| | - Kunihiko Takahashi
- Department of Biostatistics M&D Data Science Center Tokyo Medical and Dental University Tokyo Japan
| | - Yukihiro Ohya
- Allergy Center National Center for Child Health and Development Tokyo Japan
| | - Hiroshi Nakajima
- Department of Allergy and Clinical Immunology Graduate School of Medicine Chiba University Chiba Japan
| | - Atsuko Murashima
- Division of Maternal Medicine Center for Maternal‐Fetal, Neonatal and Reproductive Medicine National Center for Child Health and Development Tokyo Japan
- Japan Drug Information Institute in Pregnancy National Center for Child Health and Development Tokyo Tokyo Japan
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12
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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] [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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13
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Ma Z, Chen L, Xian R, Fang H, Wang J, Hu Y. Time trends of childhood food allergy in China: Three cross-sectional surveys in 1999, 2009, and 2019. Pediatr Allergy Immunol 2021; 32:1073-1079. [PMID: 33651447 DOI: 10.1111/pai.13490] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Revised: 02/23/2021] [Accepted: 02/25/2021] [Indexed: 12/19/2022]
Abstract
BACKGROUND Many countries have recorded the trends of food allergy (FA) prevalence. Little is known about epidemiologic trends of childhood FA in China. METHODS In three cross-sectional surveys conducted in 1999, 2009, and 2019, the prevalence of and characteristic changes in FA in children aged ≤ 2 years were assessed and the outcomes were compared. All the children were recruited during well-baby check-ups at the Children's Hospital of Chongqing Medical University. All participants had a detailed medical history taken and underwent skin prick tests using ten commercial food extracts. Open food challenges were used for confirmation of FA. RESULTS The three studies included 1228 children (314 in 1999, 401 in 2009, and 513 in 2019; response rate > 95%). The prevalence of FA in 2009 (7.7%) and 2019 (11.1%) was significantly higher than that in 1999 (3.5%). However, there was no statistically significant difference in prevalence between 2009 and 2019 (P = .086). There was evidence of increased prevalence in CMPA between 1999 and 2019 (1.6% versus 5.7%; P = .004). However, no statistic difference was found in egg allergy (2.9% versus 5.5%; P = .21). The incidence of skin symptoms did not differ significantly over the study period, while the incidence of gastrointestinal symptoms increased significantly (18.2% in 1999, 12.9% in 2009, and 43.9% in 2019; P < .05). CONCLUSIONS The prevalence of FA in children rapidly increased after the 1990s and gradually stabilized after 2010. Cow's milk has become the most common food allergen among children in Chongqing. The incidence of gastrointestinal symptoms as a manifestation of FA has increased significantly since 2010.
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Affiliation(s)
- Zhuoying Ma
- Department of Child Health Care, Children's Hospital of Chongqing Medical University, Chongqing, China.,National Clinical Research Center for Child Health and Disorders, Chongqing, China.,Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China
| | - Lin Chen
- National Clinical Research Center for Child Health and Disorders, Chongqing, China.,Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China
| | - Ruoling Xian
- National Clinical Research Center for Child Health and Disorders, Chongqing, China.,Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China
| | - Heping Fang
- National Clinical Research Center for Child Health and Disorders, Chongqing, China.,Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China
| | - Juan Wang
- Department of Child Health Care, Children's Hospital of Chongqing Medical University, Chongqing, China.,National Clinical Research Center for Child Health and Disorders, Chongqing, China.,Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China
| | - Yan Hu
- Department of Child Health Care, Children's Hospital of Chongqing Medical University, Chongqing, China.,National Clinical Research Center for Child Health and Disorders, Chongqing, China.,Ministry of Education Key Laboratory of Child Development and Disorders, Chongqing, China.,Chongqing Key Laboratory of Child Health and Nutrition, Chongqing, China
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14
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Zeng J, Wu W, Tang N, Chen Y, Jing J, Cai L. Maternal Dietary Protein Patterns During Pregnancy and the Risk of Infant Eczema: A Cohort Study. Front Nutr 2021; 8:608972. [PMID: 34150822 PMCID: PMC8206490 DOI: 10.3389/fnut.2021.608972] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2020] [Accepted: 05/11/2021] [Indexed: 12/24/2022] Open
Abstract
Background: Previous studies have suggested that maternal dietary protein was associated with allergic diseases in offspring, but few studies have evaluated the influence of dietary protein patterns. This study aimed to explore the prospective association between maternal dietary protein patterns during pregnancy and the risk of infant eczema. Methods: A total of 713 mother-child pairs from a prospective cohort in Guangzhou, China were recruited. Maternal dietary protein was estimated using a validated face-to-face food frequency questionnaire at 20–28 weeks' gestation from 2017 to 2018. Dietary protein patterns were calculated based on the sources of protein. The data of infant eczema was assessed at 6 months of age using the symptom questionnaire of eczema. Logistic regression was carried out to examine the associations between maternal dietary protein patterns and infant eczema. Results: The cumulative incidence of infant eczema at 6 months of age was 51.19%. Mothers of infants with eczema consumed more protein from poultry source during pregnancy than mothers of infants without eczema, while no statistical differences were observed in maternal intakes of protein from cereals and tubers, vegetables, fruits, red meat, fish and seafood, eggs, dairy, soybean, and nuts and seeds. Four dietary protein patterns were identified and termed poultry, plant, dairy and eggs, and red meat and fish. The cumulative incidence of eczema was 61.2, 45.8, 48.0, 51.4% for these four patterns, respectively. Compared to the poultry dietary pattern, the plant pattern and the dairy and eggs pattern were associated with a reduced risk of infant eczema, and the adjusted odds ratios (95% confidence interval) were 0.572 (0.330–0.992), 0.478 (0.274–0.837), respectively. No such association was observed for the red meat and fish dietary protein pattern. Conclusion: This is the first study that focused on the association between maternal dietary protein during pregnancy from a whole-diet perspective and infant eczema. Compared with the poultry dietary protein pattern, the maternal plant pattern and the dairy and eggs pattern during pregnancy were associated with a reduced risk of infant eczema.
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Affiliation(s)
- Jingjing Zeng
- Department of Maternal and Child Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Weijia Wu
- Department of Scientific Research, Hainan Women and Children's Medical Center, Haikou, China
| | - Nu Tang
- Department of Maternal and Child Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Yajun Chen
- Department of Maternal and Child Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Jin Jing
- Department of Maternal and Child Health, School of Public Health, Sun Yat-sen University, Guangzhou, China
| | - Li Cai
- Department of Maternal and Child Health, School of Public Health, Sun Yat-sen University, Guangzhou, China.,Guangdong Key Laboratory of Nutrition, Diet and Health, Guangzhou, China
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15
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Tsai TL, Lei WT, Kuo CC, Sun HL, Su PH, Wang SL. Maternal and childhood exposure to inorganic arsenic and airway allergy - A 15-Year birth cohort follow-up study. ENVIRONMENT INTERNATIONAL 2021; 146:106243. [PMID: 33161204 DOI: 10.1016/j.envint.2020.106243] [Citation(s) in RCA: 23] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/30/2020] [Revised: 10/20/2020] [Accepted: 10/22/2020] [Indexed: 06/11/2023]
Abstract
BACKGROUND The prevalence of allergic diseases in children has increased globally. Early-life exposure to inorganic arsenic has been found to be associated with impaired immune function and decreased lung function in children; however, the results are inconsistent. We aimed to evaluate the effect of prenatal and childhood exposure to inorganic arsenic on allergic diseases in children, through a 15-year follow-up birth cohort study, conducted in central Taiwan. METHODS Children born to women enrolled in the Taiwan Maternal and Infant Cohort Study (TMICS-pilot) from December 2000 to November 2001 were recruited and followed every 2-3 years until the age of 14 years. Urinary specimens were collected in the pregnant women during the 3rd trimester and the followed children. Diagnoses of allergic diseases were based on physician diagnoses using the International Study of Asthma and Allergies in Childhood questionnaire. Urinary arsenic speciation was performed using high-performance liquid chromatography and inductively coupled plasma dynamic reaction cell mass spectrophotometry. RESULTS Of the 261 children from 358 mother-infant pairs for this study, those with asthma and allergic rhinitis reported a higher prevalence of maternal allergy (49.47%) than did non-allergic children (29.81%). In the fully adjusted model, levels of maternal urine (iAs + MMA + DMA) greater than the median were found to be significantly associated with an increased risk of asthma (OR = 4.28; 95% CI 1.32, 13.85). Levels of urinary (iAs + MMA + DMA) in children higher than the median were associated with an increased risk of allergic rhinitis (OR = 2.26; 95% CI 1.20, 4.26). CONCLUSION Prenatal and childhood exposure to inorganic arsenic were found to be significantly associated with the occurrence of asthma and allergic rhinitis in children, respectively. Further large cohort follow-up studies are important to validate the association between inorganic arsenic exposure and allergic diseases in children.
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Affiliation(s)
- Tsung-Lin Tsai
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan; Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan; Department of Healthcare Administration, Asia University, Taichung, Taiwan
| | - Wei-Te Lei
- Section of Immunology, Rheumatology, and Allergy Department of Pediatrics, Hsinchu Mackay Memorial Hospital, Hsinchu City, Taiwan; Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan City, Taiwan
| | - Chin-Chi Kuo
- Big Data Center, China Medical University Hospital, Taichung, Taiwan; Division of Nephrology, Department of Internal Medicine, China Medical University Hospital and China Medical University, Taichung, Taiwan
| | - Hai-Lun Sun
- Department of Pediatrics, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Pen-Hua Su
- Department of Pediatrics, Chung Shan Medical University Hospital, Taichung, Taiwan
| | - Shu-Li Wang
- National Institute of Environmental Health Sciences, National Health Research Institutes, Miaoli, Taiwan; Department of Safety, Health, and Environmental Engineering, National United University, Miaoli, Taiwan; Department of Public Health, National Defense Medical Center, Taipei, Taiwan; Research Center for Environmental Medicine, Kaohsiung Medical University, Kaohsiung, Taiwan.
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16
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van Esch BCAM, Porbahaie M, Abbring S, Garssen J, Potaczek DP, Savelkoul HFJ, van Neerven RJJ. The Impact of Milk and Its Components on Epigenetic Programming of Immune Function in Early Life and Beyond: Implications for Allergy and Asthma. Front Immunol 2020; 11:2141. [PMID: 33193294 PMCID: PMC7641638 DOI: 10.3389/fimmu.2020.02141] [Citation(s) in RCA: 48] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2020] [Accepted: 08/06/2020] [Indexed: 12/12/2022] Open
Abstract
Specific and adequate nutrition during pregnancy and early life is an important factor in avoiding non-communicable diseases such as obesity, type 2 diabetes, cardiovascular disease, cancers, and chronic allergic diseases. Although epidemiologic and experimental studies have shown that nutrition is important at all stages of life, it is especially important in prenatal and the first few years of life. During the last decade, there has been a growing interest in the potential role of epigenetic mechanisms in the increasing health problems associated with allergic disease. Epigenetics involves several mechanisms including DNA methylation, histone modifications, and microRNAs which can modify the expression of genes. In this study, we focus on the effects of maternal nutrition during pregnancy, the effects of the bioactive components in human and bovine milk, and the environmental factors that can affect early life (i.e., farming, milk processing, and bacterial exposure), and which contribute to the epigenetic mechanisms underlying the persistent programming of immune functions and allergic diseases. This knowledge will help to improve approaches to nutrition in early life and help prevent allergies in the future.
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Affiliation(s)
- Betty C. A. M. van Esch
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
- Danone Nutricia Research, Utrecht, Netherlands
| | - Mojtaba Porbahaie
- Cell Biology and Immunology Group, Wageningen University & Research, Wageningen, Netherlands
| | - Suzanne Abbring
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Johan Garssen
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
- Danone Nutricia Research, Utrecht, Netherlands
| | - Daniel P. Potaczek
- Institute of Laboratory Medicine, Member of the German Center for Lung Research (DZL), The Universities of Giessen and Marburg Lung Center (UGMLC), Philipps-University Marburg, Marburg, Germany
- John Paul II Hospital, Krakow, Poland
| | - Huub F. J. Savelkoul
- Cell Biology and Immunology Group, Wageningen University & Research, Wageningen, Netherlands
| | - R. J. Joost van Neerven
- Cell Biology and Immunology Group, Wageningen University & Research, Wageningen, Netherlands
- FrieslandCampina, Amersfoort, Netherlands
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17
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Oral Administration of Live and Dead Cells of Lactobacillus sakei proBio65 Alleviated Atopic Dermatitis in Children and Adolescents: a Randomized, Double-Blind, and Placebo-Controlled Study. Probiotics Antimicrob Proteins 2020; 13:315-326. [PMID: 32949011 DOI: 10.1007/s12602-020-09654-7] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Several studies suggest that probiotics might be useful in the management of atopic dermatitis (AD). However, the efficacy and comparison between both the administration of viable and non-viable probiotics on alleviation of AD is not well studied. Therefore, the purpose of this study was to evaluate the effect of L. sakei proBio65 live and dead cells when administered (1 × 1010 cells/day) for 12 weeks to children and adolescents (aged 3 to 18) with atopic dermatitis. In this randomized double-blind, placebo-controlled study, ninety patients were recruited and randomly allocated to either the L. sakei proBio65 live cells, L. sakei proBio65 dead cells, or placebo groups. Assessment of efficacy was based on the change in SCORing Atopic Dermatitis (SCORAD) score, Investigators Global Assessment (IGA) score, serum inflammatory markers such as the serum eosinophil (count), IgE, eosinophil cationic protein (ECP), CCL17 (thymus and activation-regulated chemokine [TARC]), and CCL27 (cutaneous T cell-attracting chemokine [CTACK]), and changes in skin condition (moisture and sebum) at baseline, week 6 and week 12. The SCORAD total score decreased in the live cells (p = 0.0015) and dead cell group (p = 0.0017) from the baseline after 12 weeks, whereas there were no significant changes in the placebo group when compared with baseline. The skin sebum content increased in both the live cell (p < 0.0001) and the dead cell group (p < 0.0001), suggesting potential improvements in skin barrier functions. Current data suggested a positive improvement in alleviation of AD symptoms upon oral administration of L. sakei proBio65 in both viable and non-viable forms.
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18
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Imran S, Neeland MR, Shepherd R, Messina N, Perrett KP, Netea MG, Curtis N, Saffery R, Novakovic B. A Potential Role for Epigenetically Mediated Trained Immunity in Food Allergy. iScience 2020; 23:101171. [PMID: 32480123 PMCID: PMC7262566 DOI: 10.1016/j.isci.2020.101171] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2020] [Revised: 03/01/2020] [Accepted: 05/12/2020] [Indexed: 12/13/2022] Open
Abstract
The prevalence of IgE-mediated food allergy is increasing at a rapid pace in many countries. The association of high food allergy rates with Westernized lifestyles suggests the role of gene-environment interactions, potentially underpinned by epigenetic variation, in mediating this process. Recent studies have implicated innate immune system dysfunction in the development and persistence of food allergy. These responses are characterized by increased circulating frequency of innate immune cells and heightened inflammatory responses to bacterial stimulation in food allergic patients. These signatures mirror those described in trained immunity, whereby innate immune cells retain a “memory” of earlier microbial encounters, thus influencing subsequent immune responses. Here, we propose that a robust multi-omics approach that integrates immunological, transcriptomic, and epigenomic datasets, combined with well-phenotyped and longitudinal food allergy cohorts, can inform the potential role of trained immunity in food allergy.
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Affiliation(s)
- Samira Imran
- Murdoch Children's Research Institute, and Department of Paediatrics, University of Melbourne, Royal Children's Hospital, Flemington Road, Parkville, VIC 3052, Australia
| | - Melanie R Neeland
- Murdoch Children's Research Institute, and Department of Paediatrics, University of Melbourne, Royal Children's Hospital, Flemington Road, Parkville, VIC 3052, Australia
| | - Rebecca Shepherd
- Murdoch Children's Research Institute, and Department of Paediatrics, University of Melbourne, Royal Children's Hospital, Flemington Road, Parkville, VIC 3052, Australia
| | - Nicole Messina
- Murdoch Children's Research Institute, and Department of Paediatrics, University of Melbourne, Royal Children's Hospital, Flemington Road, Parkville, VIC 3052, Australia
| | - Kirsten P Perrett
- Murdoch Children's Research Institute, and Department of Paediatrics, University of Melbourne, Royal Children's Hospital, Flemington Road, Parkville, VIC 3052, Australia; Department of Allergy and Immunology, Royal Children's Hospital, Melbourne, Australia
| | - Mihai G Netea
- Department of Internal Medicine and Radboud Center for Infectious Diseases, Radboud University Medical Center, Nijmegen, Netherlands; Department for Genomics and Immunoregulation, Life and Medical Sciences Institute (LIMES), University of Bonn, Bonn, Germany
| | - Nigel Curtis
- Murdoch Children's Research Institute, and Department of Paediatrics, University of Melbourne, Royal Children's Hospital, Flemington Road, Parkville, VIC 3052, Australia
| | - Richard Saffery
- Murdoch Children's Research Institute, and Department of Paediatrics, University of Melbourne, Royal Children's Hospital, Flemington Road, Parkville, VIC 3052, Australia
| | - Boris Novakovic
- Murdoch Children's Research Institute, and Department of Paediatrics, University of Melbourne, Royal Children's Hospital, Flemington Road, Parkville, VIC 3052, Australia.
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19
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Fereidouni M, Nami FA, Serki E, Arefi M. Evaluation of cord blood immunoglobulin E and its association with maternal factors in a group of Iranian newborns. J Cell Biochem 2019; 120:13658-13663. [PMID: 30937964 DOI: 10.1002/jcb.28639] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 12/25/2018] [Accepted: 01/14/2019] [Indexed: 11/05/2022]
Abstract
Allergic disorders are among the most common diseases around the world especially in children. Many factors contribute to the pathogenesis of atopic disorders, but early events during the pregnancy are very important. The aim of this study was to evaluate the level of cord blood immunoglobulin E (CB-IgE) and its association with maternal in a group of Iranian newborns. In a cross-sectional study, 163 pregnant women randomly selected and information about pregnancy and atopy were taken by questionnaire. Blood samples of mothers and matched cord blood were collected and total serum IgE levels were measured by enzyme-linked immunosorbent assay (ELISA) method. To rolling out the possibility of contamination with maternal blood, total IgA was checked for all the cord blood samples. Sixteen percent of mothers had the history of atopic diseases and the mean IgE level was significantly higher in an atopic than nonatopic mothers (241 vs 102, P < 0.001). About 73.9% of cord blood samples, had high IgE level (>0.9 IU/mL). The level of cord blood IgE (CB-IgE) was not significantly different in male and female newborns (2.14 vs 2.15 IU/mL). There was no significant correlation between maternal factors such as age, pregnancy variables, allergens exposure, smoking, and maternal IgE with cord blood IgE. The results of this study showed that CB-IgE is high in a remarkable number of samples; independent of maternal or fetal factors. Further studies need to evaluate the reasons for the high level of IgE in cord blood in our area.
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Affiliation(s)
- Mohammad Fereidouni
- Cellular and Molecular Research Center, Medical School, Birjand University of Medical Sciences, Birjand, Iran
| | - Fateme Arefe Nami
- Asthma, Allergy & Immunology Research Center, Medical School, Birjand University of Medical Sciences, Birjand, Iran
| | - Elham Serki
- Asthma, Allergy & Immunology Research Center, Medical School, Birjand University of Medical Sciences, Birjand, Iran
| | - Majid Arefi
- Institute of Genetics Medicine, Newcastle University, Newcastle upon Tyne, United Kingdom
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20
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Loo EXL, Chew LJM, Zulkifli AB, Ta LDH, Kuo IC, Goh A, Teoh OH, Van Bever H, Gluckman PD, Yap F, Tan KH, Chong YS, Lee BW, Shek LPC. Comparison of microbiota and allergen profile in house dust from homes of allergic and non-allergic subjects- results from the GUSTO study. World Allergy Organ J 2018; 11:37. [PMID: 30534340 PMCID: PMC6280478 DOI: 10.1186/s40413-018-0212-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Accepted: 10/04/2018] [Indexed: 02/08/2023] Open
Abstract
Background The prevalence of allergic diseases, such as asthma, allergic rhinitis, eczema and food allergy, has been increasing worldwide, as shown in a large number of studies, including the International Study of Asthma and Allergies in Childhood (ISAAC). However, there is significant variation in the prevalence of these diseases in different regions, suggesting that there may be location-specific factors such as environment and microbial exposure affecting allergic disease prevalence. Hence, in this study we determine if there is a difference in microbiota composition and allergen concentration of household dust collected from the homes of non-allergic and allergic subjects from the Growing Up in Singapore Towards Healthy Outcomes (GUSTO) cohort. Methods From the Growing Up in Singapore Towards Healthy Outcomes (GUSTO) cohort, 25 allergic subjects and 25 non-allergic subjects were selected at the year 5.5 follow up. Definitions of allergic outcomes were standardized in the questionnaires administered at 3, 6, 9, 12, 15, 18, 24, 36, 48 and 60 months to ensure consistency during interviews and home visits. Allergen sensitization was determined by skin prick testing (SPT) at 18, 36 and 60 months. Dust samples were collected from the subject’s bed, sofa, and play area. DNA extraction was carried out and V3-V4 hypervariable regions of bacterial 16S rRNA gene were sequenced. Protein extraction was performed and allergens assayed by using multiplex assay and ELISA. Results The most abundant phyla in house dust were Actinobacteria (29.8%), Firmicutes (27.7%), and Proteobacteria (22.4%). Although there were no differences in bacteria abundance and diversity between house dust samples of allergic and non-allergic subjects, the relative abundance of Anaplasmataceae, Bacteroidaceae, and Leptospiraceae were significantly higher in dust samples of allergic subjects as compared to non-allergic subjects in 2 or more locations. The concentration of Der p 1 was significantly lower in bed dust samples of allergic subjects (Median [Interquartile range], 174 ng/g [115–299 ng/g]) as compared to non-allergic subjects (309 ng/g [201–400 ng/g]; P < 0.05). The concentration of tropomyosin was significantly higher in sofa dust samples of allergic subjects (175 ng/g [145–284 ng/g] as compared to non-allergic subjects (116 ng/g [52.8–170 ng/g]; P < 0.05). Conclusion In conclusion, we found a differential microbiota and allergen profile between homes of allergic and non-allergic subjects. Trial registration NCT01174875 Registered 1 July 2010, retrospectively registered. Electronic supplementary material The online version of this article (10.1186/s40413-018-0212-5) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Evelyn Xiu Ling Loo
- 1Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (ASTAR), Singapore, Singapore
| | - Lamony Jian Ming Chew
- 2Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Atiqa Binte Zulkifli
- 2Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Le Duc Huy Ta
- 2Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - I-Chun Kuo
- 2Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Anne Goh
- 3Allergy Service, Department of Paediatrics, KK Women's and Children's Hospital, Singapore, Singapore
| | - Oon Hoe Teoh
- 10Respiratory Medicine Service, Department of Paediatrics, KK Women's and Children's Hospital, Singapore, Singapore
| | - Hugo Van Bever
- 2Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,7Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, National University Health System, Singapore, Singapore
| | - Peter D Gluckman
- 5Growth, Development and Metabolism Programme, Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (ASTAR), Singapore, Singapore.,6Liggins Institute, University of Auckland, Auckland, New Zealand
| | - Fabian Yap
- 9Department of Endocrinology, KK Women's and Children's Hospital, Singapore, Singapore
| | - Kok Hian Tan
- 8Department of Maternal Fetal Medicine, KK Women's and Children's Hospital, Singapore, Singapore
| | - Yap Seng Chong
- 1Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (ASTAR), Singapore, Singapore.,4Department of Obstetrics & Gynaecology, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Bee Wah Lee
- 2Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore
| | - Lynette Pei-Chi Shek
- 1Singapore Institute for Clinical Sciences (SICS), Agency for Science, Technology and Research (ASTAR), Singapore, Singapore.,2Department of Paediatrics, Yong Loo Lin School of Medicine, National University of Singapore, Singapore, Singapore.,7Khoo Teck Puat-National University Children's Medical Institute, National University Hospital, National University Health System, Singapore, Singapore
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21
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Francis A, Bosio E, Stone SF, Fatovich DM, Arendts G, MacDonald SPJ, Burrows S, Brown SGA. Markers Involved in Innate Immunity and Neutrophil Activation are Elevated during Acute Human Anaphylaxis: Validation of a Microarray Study. J Innate Immun 2018; 11:63-73. [PMID: 30189430 DOI: 10.1159/000492301] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Accepted: 07/20/2018] [Indexed: 12/31/2022] Open
Abstract
BACKGROUND We have previously identified the upregulation of the innate immune response, neutrophil activation, and apoptosis during anaphylaxis using a microarray approach. This study aimed to validate the differential gene expression and investigate protein concentrations of "hub genes" and upstream regulators during anaphylaxis. METHODS Samples were collected from patients with anaphylaxis on their arrival at the emergency department, and after 1 and 3 h. mRNA levels of 11 genes (interleukin-6 [IL-6], IL-10, oncostatin M [OSM], S100A8, S100A9, matrix metalloproteinase 9 [MMP9], FASL, toll-like receptor 4 [TLR4], MYD88, triggering receptor expressed on myeloid cells 1 [TREM1], and cluster of differentiation 64 [CD64]) were measured in peripheral blood leucocytes using qPCR. Serum protein concentrations were measured by ELISA or cytometric bead array for 6 of these candidates. RESULTS Of 69 anaphylaxis patients enrolled, 36 (52%) had severe reactions, and 38 (55%) were female. Increases in both mRNA and protein of IL-10, S100A9, MMP9, and TREM1 were observed. OSM, S100A8, TLR4, and CD64 were upregulated and IL-6 protein concentrations were increased during anaphylaxis. Both FASL and soluble Fas ligand decreased during anaphylaxis. CONCLUSION These results provide evidence for the involvement of innate immune pathways and myeloid cells during human anaphylaxis, validating previous microarray findings. Elevated S100A8, S100A9, TLR4, and TREM1 expression, and increased S100A9 and soluble TREM1 protein concentrations strongly suggest that neutrophils are activated during acute anaphylaxis.
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Affiliation(s)
- Abbie Francis
- Centre for Clinical Research in Emergency Medicine, Harry Perkins Institute of Medical Research, Perth, Washington, .,Division of Emergency Medicine, Medical School, University of Western Australia, Perth, Washington,
| | - Erika Bosio
- Centre for Clinical Research in Emergency Medicine, Harry Perkins Institute of Medical Research, Perth, Washington, Australia.,Division of Emergency Medicine, Medical School, University of Western Australia, Perth, Washington, Australia
| | - Shelley F Stone
- Centre for Clinical Research in Emergency Medicine, Harry Perkins Institute of Medical Research, Perth, Washington, Australia.,Division of Emergency Medicine, Medical School, University of Western Australia, Perth, Washington, Australia
| | - Daniel M Fatovich
- Centre for Clinical Research in Emergency Medicine, Harry Perkins Institute of Medical Research, Perth, Washington, Australia.,Division of Emergency Medicine, Medical School, University of Western Australia, Perth, Washington, Australia.,Emergency Department, Royal Perth Hospital, Perth, Washington, Australia
| | - Glenn Arendts
- Centre for Clinical Research in Emergency Medicine, Harry Perkins Institute of Medical Research, Perth, Washington, Australia.,Division of Emergency Medicine, Medical School, University of Western Australia, Perth, Washington, Australia.,Emergency Department, Royal Perth Hospital, Perth, Washington, Australia.,Emergency Department, Fiona Stanley Hospital, Murdoch, Washington, Australia
| | - Stephen P J MacDonald
- Centre for Clinical Research in Emergency Medicine, Harry Perkins Institute of Medical Research, Perth, Washington, Australia.,Division of Emergency Medicine, Medical School, University of Western Australia, Perth, Washington, Australia.,Emergency Department, Royal Perth Hospital, Perth, Washington, Australia.,Emergency Department, Armadale-Kelmscott Memorial Hospital, Mount Nasura, Washington, Australia
| | - Sally Burrows
- School of Medicine and Pharmacology, University of Western Australia, Perth, Washington, Australia
| | - Simon G A Brown
- Centre for Clinical Research in Emergency Medicine, Harry Perkins Institute of Medical Research, Perth, Washington, Australia.,Division of Emergency Medicine, Medical School, University of Western Australia, Perth, Washington, Australia.,Emergency Department, Royal Perth Hospital, Perth, Washington, Australia.,Emergency Department, Royal Hobart Hospital, Hobart, Tasmania, Australia
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22
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Gamazo C, D'Amelio C, Gastaminza G, Ferrer M, Irache JM. Adjuvants for allergy immunotherapeutics. Hum Vaccin Immunother 2018; 13:2416-2427. [PMID: 28825867 DOI: 10.1080/21645515.2017.1348447] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Allergic diseases are reaching epidemic proportions in developed countries. In particular, food allergy is increasing in prevalence and severity, thus becoming an important socioeconomic burden. Numerous cell types and cell populations, which form an intricate and balanced network, are involved in an immune response. This balance is occasionally disturbed, leading to the onset of different diseases, such as allergic diseases. Antihistamines and corticosteroids provide some degree of relief from the symptoms of allergic conditions. However, the only treatment that can revert the disease is immunotherapy. Nevertheless, specific immunotherapy has at least 2 major drawbacks: it is time-consuming, and it can produce local and even systemic allergic side effects. Immunotherapy's potential goes beyond our current knowledge of the immune response; nevertheless, we can still design strategies to reach a safer immune modulation for treating allergies. This review deals with the use of adjuvants to reduce the undesirable side effects associated with specific allergen immunotherapy. For example, nanoparticles used as immunoadjuvants are offering promising results in preclinical assays.
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Affiliation(s)
- Carlos Gamazo
- a Dept. Microbiology , Instituto de Investigación Sanitaria de Navarra (Idisna), University of Navarra , Pamplona , Spain
| | - Carmen D'Amelio
- b Department of Allergology and Clinical Immunology , Clínica Universidad de Navarra-Pamplona , Pamplona , Spain
| | - Gabriel Gastaminza
- c Department of Allergology and Clinical Immunology , Clínica Universidad de Navarra-Pamplona , Pamplona , Spain
| | - Marta Ferrer
- d Department of Allergology and Clinical Immunology , Clínica Universidad de Navarra-Pamplona , Pamplona , Spain
| | - Juan M Irache
- e Dept. Pharmacy and Pharmaceutical Technology , University of Navarra , Pamplona , Spain
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23
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Li Y, Mu Z, Wang H, Liu J, Jiang F. The role of particulate matters on methylation of IFN-γ and IL-4 promoter genes in pediatric allergic rhinitis. Oncotarget 2018; 9:17406-17419. [PMID: 29707116 PMCID: PMC5915124 DOI: 10.18632/oncotarget.24227] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Accepted: 12/27/2017] [Indexed: 01/23/2023] Open
Abstract
Allergic rhinitis (AR) is a chronic inflammatory disorder driven by T cell activation. How particulate matter contributes to epigenetic changes that in turn influence cytokine gene expression in CD4+T cells remains unclear. In this study, 105 children diagnosed with AR and 90 healthy controls were recruited to explore the possible mechanism of particulate matter (PM) on the epigenetic regulation of CD4+T IFN-γ and IL-4 promoter genes. Daily average PM10 and PM2.5 were obtained from five state-controlled monitoring stations, and activity-based dynamic exposure and personal exposure data were collected. DNA methylation patterns of IFN-γ and IL-4 promoter regions were analyzed using bisulfite sequencing. mRNA levels were detected by real-time quantitative reverse transcription polymerase chain reaction. We found that the methylation rate in IFN-γ was higher in AR CD4+T cells than in the controls. IFN-γ mRNA expression was significantly decreased in CD4+T cells, and negatively correlated with the mean methylation level of IFN-γ. However, no correlation between IL-4 methylation and IL-4 mRNA expression was found. After adjusting for age, gender, exclusive breastfeeding within 4 months after birth and parental history of allergic disease, out data showed that PM2.5 exposure level was positively correlated with methylation level in IFN-γ promoter region and decreased cytokine expression. We conclude that the effect of PM2.5 on pediatric AR may be mediated through epigenetic modification of IFN-γ promoter region.
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Affiliation(s)
- Youjin Li
- Department of Otorhinolaryngology-Head and Neck Surgery, Children's Medical Center, Shanghai Jiaotong University, Shanghai 200127, China
| | - Zhe Mu
- School of Public Health, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.,Shanghai Key Laboratory of Meteorology and Health, Shanghai Meteorological Bureau, Shanghai 200030, China
| | - Hongyang Wang
- Chinese PLA Institute of Otolaryngology, Chinese PLA General Hospital, Medical School of Chinese PLA, Beijing 100853, China
| | - Jinfen Liu
- Department of Pediatrics, Children's Medical Center, Shanghai Jiaotong University, Shanghai Jiaotong University Pediatric Institute, Shanghai 200127, China
| | - Fan Jiang
- Department of Child Development and Behavior, Children's Medical Center, Shanghai Jiaotong University, Shanghai 200127, China.,MOE-Shanghai Key Laboratory of Children's Environmental Health, Shanghai 200127, China
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24
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Liu HX, Chen T, Wen X, Qu W, Liu S, Yan HY, Hou LF, Ping J. Maternal Glucocorticoid Elevation and Associated Fetal Thymocyte Apoptosis are Involved in Immune Disorders of Prenatal Caffeine Exposed Offspring Mice. Sci Rep 2017; 7:13746. [PMID: 29062003 PMCID: PMC5653827 DOI: 10.1038/s41598-017-14103-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2017] [Accepted: 10/03/2017] [Indexed: 02/03/2023] Open
Abstract
Our previous study showed that prenatal caffeine exposure (PCE) could induce intrauterine growth retardation (IUGR) and glucocorticoid elevation in the fetus. Researchers suggested that IUGR is a risk factor for T helper cell (Th)1/Th2 deviation. However, whether PCE can induce these immune disorders and the underlying mechanisms of that induction remain unknown. This study aimed to observe the effects of PCE on the Th1/Th2 balance in offspring and further explore the developmental origin mechanisms from the perspective of glucocorticoid overexposure-induced thymocyte apoptosis. An IUGR model was established by caffeine administration from gestational day (GD) 9 to GD 18, and the offspring were immunized on postnatal day (PND) 42. The results show that maternal glucocorticoid overexposure increased fetal thymocyte apoptosis by activating both the Fas-mediated and the Bim-regulated apoptotic pathways. After birth, accelerated thymocyte apoptosis and Th1 suppression were also found in the PCE offspring at PND 14 and PND 49. Moreover, the PCE offspring showed immune disorders after immunization, manifesting as increased IgG1/IgG2a ratio and IL-4 production in the serum. In conclusion, PCE could induce fetal overexposure to maternal glucocorticoids and increase thymocyte apoptosis, which could persist into postnatal life and be implicated in Th1 inhibition and further immune disorders.
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Affiliation(s)
- Han-Xiao Liu
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China
| | - Ting Chen
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China
| | - Xiao Wen
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China
| | - Wen Qu
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China
| | - Sha Liu
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China
| | - Hui-Yi Yan
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China
| | - Li-Fang Hou
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China
| | - Jie Ping
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan, 430071, China.
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25
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Liu HX, Liu S, Qu W, Yan HY, Wen X, Chen T, Hou LF, Ping J. α7 nAChR mediated Fas demethylation contributes to prenatal nicotine exposure-induced programmed thymocyte apoptosis in mice. Oncotarget 2017; 8:93741-93756. [PMID: 29212186 PMCID: PMC5706832 DOI: 10.18632/oncotarget.21526] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Accepted: 09/20/2017] [Indexed: 01/19/2023] Open
Abstract
This study aimed to investigate the effects of prenatal nicotine exposure (PNE) on thymocyte apoptosis and postnatal immune impairments in vivo and further explore the epigenetic mechanisms of the pro-apoptotic effect of nicotine in vitro. The results showed that PNE caused immune impairments in offspring on postnatal day 49, manifested as increased IL-4 production and an increased IgG1/IgG2a ratio in serum. Enhanced apoptosis of total and CD4+SP thymocytes was observed both in fetus and in offspring. Further, by exposing thymocytes to 0–100 μM of nicotine in vitro for 48 h, we found that nicotine increased α7 nicotinic acetylcholine receptor (nAChR) expression, activated the Fas apoptotic pathway, and promoted thymocyte apoptosis in concentration-dependent manners. In addition, nicotine could induce Tet methylcytosine dioxygenase (TET) 2 expression and Fas promoter demethylation, which can be abolished by TET2 siRNA transfection. Moreover, the α7 nAChR specific antagonist α-bungarotoxin can abrogate nicotine-induced TET2 increase, and the following Fas demethylation and Fas-mediated apoptosis. In conclusion, our findings showed, for the first time, that α7 nAChR activation could induce TET2-mediated Fas demethylation in thymocytes and results in the upregulation of Fas apoptotic pathway, which provide evidence for elucidating the PNE-induced programmed thymocyte apoptosis.
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Affiliation(s)
- Han-Xiao Liu
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Sha Liu
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Wen Qu
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Hui-Yi Yan
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Xiao Wen
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Ting Chen
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Li-Fang Hou
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Jie Ping
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
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26
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Wooldridge AL, Bischof RJ, Liu H, Heinemann GK, Hunter DS, Giles LC, Simmons RA, Lien YC, Lu W, Rabinowitz JD, Kind KL, Owens JA, Clifton VL, Gatford KL. Late-gestation maternal dietary methyl donor and cofactor supplementation in sheep partially reverses protection against allergic sensitization by IUGR. Am J Physiol Regul Integr Comp Physiol 2017; 314:R22-R33. [PMID: 28978515 DOI: 10.1152/ajpregu.00549.2016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Perinatal exposures are associated with altered risks of childhood allergy. Human studies and our previous work suggest that restricted growth in utero (IUGR) is protective against allergic disease. The mechanisms are not clearly defined, but reduced fetal abundance and altered metabolism of methyl donors are hypothesized as possible underlying mechanisms. Therefore, we examined whether late-gestation maternal dietary methyl donor and cofactor supplementation of the placentally restricted (PR) sheep pregnancy would reverse allergic protection in progeny. Allergic outcomes were compared between progeny from control pregnancies (CON; n = 49), from PR pregnancies without intervention (PR; n = 28), and from PR pregnancies where the dam was fed a methyl donor plus cofactor supplement from day 120 of pregnancy until delivery (PR + Methyl; n = 25). Both PR and PR + Methyl progeny were smaller than CON; supplementation did not alter birth size. PR was protective against cutaneous hypersensitivity responses to ovalbumin (OVA; P < 0.01 in singletons). Cutaneous hypersensitivity responses to OVA in PR + Methyl progeny were intermediate to and not different from the responses of CON and PR sheep. Cutaneous hypersensitivity responses to house dust mites did not differ between treatments. In singleton progeny, upper dermal mast cell density was greater in PR + Methyl than in PR or CON (each P < 0.05). The differences in the cutaneous allergic response were not explained by treatment effects on circulating immune cells or antibodies. Our results suggest that mechanisms underlying in utero programming of allergic susceptibility by IUGR and methyl donor availability may differ and imply that late-gestation methyl donor supplementation may increase allergy risk.
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Affiliation(s)
- Amy L Wooldridge
- Robinson Research Institute, University of Adelaide , Adelaide, South Australia , Australia.,Adelaide Medical School, University of Adelaide , Adelaide, South Australia , Australia
| | - Robert J Bischof
- The Ritchie Centre, Hudson Institute of Medical Research , Clayton, Victoria , Australia.,Department of Physiology, Monash University , Melbourne, Victoria , Australia
| | - Hong Liu
- Robinson Research Institute, University of Adelaide , Adelaide, South Australia , Australia.,Adelaide Medical School, University of Adelaide , Adelaide, South Australia , Australia
| | - Gary K Heinemann
- Robinson Research Institute, University of Adelaide , Adelaide, South Australia , Australia.,Adelaide Medical School, University of Adelaide , Adelaide, South Australia , Australia
| | - Damien S Hunter
- Robinson Research Institute, University of Adelaide , Adelaide, South Australia , Australia.,Adelaide Medical School, University of Adelaide , Adelaide, South Australia , Australia
| | - Lynne C Giles
- Robinson Research Institute, University of Adelaide , Adelaide, South Australia , Australia.,School of Population Health, University of Adelaide , Adelaide, South Australia , Australia
| | - Rebecca A Simmons
- Perelman School of Medicine, University of Pennsylvania , Philadelphia, Pennsylvania
| | - Yu-Chin Lien
- Perelman School of Medicine, University of Pennsylvania , Philadelphia, Pennsylvania
| | - Wenyun Lu
- Lewis-Sigler Institute for Integrative Genomics and Department of Chemistry, Princeton University , Princeton, New Jersey
| | - Joshua D Rabinowitz
- Lewis-Sigler Institute for Integrative Genomics and Department of Chemistry, Princeton University , Princeton, New Jersey
| | - Karen L Kind
- Robinson Research Institute, University of Adelaide , Adelaide, South Australia , Australia.,School of Animal and Veterinary Sciences, University of Adelaide , Adelaide, South Australia , Australia
| | - Julie A Owens
- Robinson Research Institute, University of Adelaide , Adelaide, South Australia , Australia.,Adelaide Medical School, University of Adelaide , Adelaide, South Australia , Australia
| | - Vicki L Clifton
- Robinson Research Institute, University of Adelaide , Adelaide, South Australia , Australia.,Adelaide Medical School, University of Adelaide , Adelaide, South Australia , Australia.,Mater Research Institute-University of Queensland and Translational Research Institute, South Brisbane, Queensland, Australia
| | - Kathryn L Gatford
- Robinson Research Institute, University of Adelaide , Adelaide, South Australia , Australia.,Adelaide Medical School, University of Adelaide , Adelaide, South Australia , Australia
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27
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Barton SJ, Ngo S, Costello P, Garratt E, El-Heis S, Antoun E, Clarke-Harris R, Murray R, Bhatt T, Burdge G, Cooper C, Inskip H, van der Beek EM, Sheppard A, Godfrey KM, Lillycrop KA. DNA methylation of Th2 lineage determination genes at birth is associated with allergic outcomes in childhood. Clin Exp Allergy 2017; 47:1599-1608. [PMID: 28756630 DOI: 10.1111/cea.12988] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Revised: 07/08/2017] [Accepted: 07/12/2017] [Indexed: 12/24/2022]
Abstract
BACKGROUND There is now increasing evidence that asthma and atopy originate in part in utero, with disease risk being associated with the altered epigenetic regulation of genes. OBJECTIVE AND METHODS To determine the relationship between variations in DNA methylation at birth and the development of allergic disease, we examined the methylation status of CpG loci within the promoter regions of Th1/2 lineage commitment genes (GATA3, IL-4, IL-4R, STAT4 and TBET) in umbilical cord DNA at birth in a cohort of infants from the Southampton Women's Survey (n = 696) who were later assessed for asthma, atopic eczema and atopy. RESULTS We found that higher methylation of GATA3 CpGs -2211/-2209 at birth was associated with a reduced risk of asthma at ages 3 (median ratio [median methylation in asthma group/median methylation in non-asthma group] = 0.74, P = .006) and 6-7 (median ratio 0.90, P = .048) years. Furthermore, we demonstrated that the GATA3 CpG loci associated with later risk of asthma lie within a NF-κB binding site and that methylation here blocks transcription factor binding to the GATA3 promoter in the human Jurkat T-cell line. Associations between umbilical cord methylation of CpG loci within IL-4R with atopic eczema at 12 months (median ratio 1.02, P = .028), and TBET with atopy (median ratio 0.98, P = .017) at 6-7 years of age were also observed. CONCLUSIONS AND CLINICAL RELEVANCE Our findings provide further evidence of a developmental contribution to the risk of later allergic disorders and suggest that involvement of epigenetic mechanisms in childhood asthma is already demonstrable at birth.
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Affiliation(s)
- S J Barton
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
| | - S Ngo
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | - P Costello
- Human Development and Health Academic Unit, University of Southampton, Southampton, UK
| | - E Garratt
- Human Development and Health Academic Unit, University of Southampton, Southampton, UK
| | - S El-Heis
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK
| | - E Antoun
- Human Development and Health Academic Unit, University of Southampton, Southampton, UK
| | - R Clarke-Harris
- Human Development and Health Academic Unit, University of Southampton, Southampton, UK.,NIHR Southampton Biomedical Research Centre, Southampton General Hospital, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton, UK
| | - R Murray
- Human Development and Health Academic Unit, University of Southampton, Southampton, UK
| | - T Bhatt
- Human Development and Health Academic Unit, University of Southampton, Southampton, UK
| | - G Burdge
- Human Development and Health Academic Unit, University of Southampton, Southampton, UK
| | - C Cooper
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK.,NIHR Southampton Biomedical Research Centre, Southampton General Hospital, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton, UK
| | - H Inskip
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK.,NIHR Southampton Biomedical Research Centre, Southampton General Hospital, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton, UK
| | - E M van der Beek
- Nutricia Research, Danone Nutricia Early Life Nutrition, Utrecht, The Netherlands.,Department of Pediatrics, University medical Centre Groningen, Groningen, The Netherlands
| | - A Sheppard
- Liggins Institute, University of Auckland, Auckland, New Zealand
| | - K M Godfrey
- MRC Lifecourse Epidemiology Unit, University of Southampton, Southampton, UK.,Human Development and Health Academic Unit, University of Southampton, Southampton, UK.,NIHR Southampton Biomedical Research Centre, Southampton General Hospital, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton, UK
| | - K A Lillycrop
- NIHR Southampton Biomedical Research Centre, Southampton General Hospital, University Hospital Southampton NHS Foundation Trust and University of Southampton, Southampton, UK.,Centre for Biological Sciences, University of Southampton, Southampton, UK
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Sardecka I, Krogulska A, Toporowska-Kowalska E. The influence of dietary immunomodulatory factors on development of food allergy in children. Postepy Dermatol Alergol 2017; 34:89-96. [PMID: 28507485 PMCID: PMC5420598 DOI: 10.5114/pdia.2016.63955] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Accepted: 04/20/2016] [Indexed: 02/08/2023] Open
Abstract
In the last few years many studies have been conducted on the role of dietary and environmental factors in the prevention of allergic diseases among children. Many studies have shown that the diet of pregnant women and children in their early postnatal life, rich in antioxidants, vitamin D, and fatty acids is beneficial as it reduces the risk of allergy in their future life. Moreover, there are many reports about the main role of gut microbiota and probiotics in the allergy prevention, what can indicate new ways of procedures in allergic diseases.
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Affiliation(s)
- Izabela Sardecka
- Department of Paediatric Allergology, Gastroenterology and Nutrition, 3 Chair of Paediatrics, Medical University of Lodz, Lodz, Poland
| | - Aneta Krogulska
- Department of Paediatry, Allergology and Gastroenterology, Ludwik Rydygier Collegium Medicum in Bydgoszcz, Nicolaus Copernicus University in Torun, Poland
| | - Ewa Toporowska-Kowalska
- Department of Paediatric Allergology, Gastroenterology and Nutrition, 3 Chair of Paediatrics, Medical University of Lodz, Lodz, Poland
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29
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Zmora N, Bashiardes S, Levy M, Elinav E. The Role of the Immune System in Metabolic Health and Disease. Cell Metab 2017; 25:506-521. [PMID: 28273474 DOI: 10.1016/j.cmet.2017.02.006] [Citation(s) in RCA: 182] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/23/2016] [Revised: 01/04/2017] [Accepted: 02/10/2017] [Indexed: 12/15/2022]
Abstract
In addition to the immune system's traditional roles of conferring anti-infectious and anti-neoplastic protection, it has been recently implicated in the regulation of systemic metabolic homeostasis. This cross-talk between the immune and the metabolic systems is pivotal in promoting "metabolic health" throughout the life of an organism and plays fundamental roles in its adaptation to ever-changing environmental makeups and nutritional availability. Perturbations in this intricate immune-metabolic cross-talk contribute to the tendency to develop altered metabolic states that may culminate in metabolic disorders such as malnutrition, obesity, type 2 diabetes mellitus (T2DM), and other features of the metabolic syndrome. Regulators of immune-metabolic interactions include host genetics, nutritional status, and the intestinal microbiome. In this Perspective, we highlight current understanding of immune-metabolism interactions, illustrate differences among individuals and between populations in this respect, and point toward future avenues of research possibly enabling immune harnessing as means of personalized treatment for common metabolic disorders.
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Affiliation(s)
- Niv Zmora
- Immunology Department, Weizmann Institute of Science, Rehovot 7610001, Israel; Internal Medicine Department, Tel Aviv Sourasky Medical Center, Tel Aviv 6423906, Israel; Research Center for Digestive Tract and Liver Diseases, Tel Aviv Sourasky Medical Center, Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6423906, Israel
| | - Stavros Bashiardes
- Immunology Department, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Maayan Levy
- Immunology Department, Weizmann Institute of Science, Rehovot 7610001, Israel
| | - Eran Elinav
- Immunology Department, Weizmann Institute of Science, Rehovot 7610001, Israel.
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30
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Yang HJ. Impact of perinatal environmental tobacco smoke on the development of childhood allergic diseases. KOREAN JOURNAL OF PEDIATRICS 2016; 59:319-27. [PMID: 27610180 PMCID: PMC5014911 DOI: 10.3345/kjp.2016.59.8.319] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2015] [Revised: 08/24/2015] [Accepted: 09/03/2015] [Indexed: 12/11/2022]
Abstract
Allergic diseases such as asthma, allergic rhinitis, atopic dermatitis, and food allergy, are most common chronic, noncommunicable diseases in childhood. In the past few decades, the prevalence has increased abruptly worldwide. There are 2 possible explanations for the rising prevalence of allergic diseases worldwide, that an increased disease-awareness of physician, patient, or caregivers, and an abrupt exposure to unknown hazards. Unfortunately, the underlying mechanisms remain largely unknown. Despite the continuing efforts worldwide, the etiologies and rising prevalence remain unclear. Thus, it is important to identify and control risk factors in the susceptible individual for the best prevention and management. Genetic susceptibility or environments may be a potential background for the development of allergic disease, however they alone cannot explain the rising prevalence worldwide. There is growing evidence that epigenetic change depends on the gene, environment, and their interactions, may induce a long-lasting altered gene expression and the consequent development of allergic diseases. In epigenetic mechanisms, environmental tobacco smoke (ETS) exposure during critical period (i.e., during pregnancy and early life) are considered as a potential cause of the development of childhood allergic diseases. However, the causal relationship is still unclear. This review aimed to highlight the impact of ETS exposure during the perinatal period on the development of childhood allergic diseases and to propose a future research direction.
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Affiliation(s)
- Hyeon-Jong Yang
- Pediatric Allergy and Respiratory Center, Department of Pediatrics, Soonchunhyang University Hospital, Soonchunhyang University College of Medicine, Seoul, Korea
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31
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"Cumulative Stress": The Effects of Maternal and Neonatal Oxidative Stress and Oxidative Stress-Inducible Genes on Programming of Atopy. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2016; 2016:8651820. [PMID: 27504149 PMCID: PMC4967692 DOI: 10.1155/2016/8651820] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 01/25/2016] [Revised: 05/27/2016] [Accepted: 06/22/2016] [Indexed: 12/16/2022]
Abstract
Although extensive epidemiological and laboratory studies have been performed to identify the environmental and immunological causes of atopy, genetic predisposition seems to be the biggest risk factor for allergic diseases. The onset of atopic diseases may be the result of heritable changes of gene expression, without any alteration in DNA sequences occurring in response to early environmental stimuli. Findings suggest that the establishment of a peculiar epigenetic pattern may also be generated by oxidative stress (OS) and perpetuated by the activation of OS-related genes. Analyzing the role of maternal and neonatal oxidative stress and oxidative stress-inducible genes, the purpose of this review was to summarize what is known about the relationship between maternal and neonatal OS-related genes and the development of atopic diseases.
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32
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Kuo HC, Yang YL, Ho SC, Guo MMH, Jiang JH, Huang YH. General anesthesia exposure in early life reduces the risk of allergic diseases: A nationwide population-based cohort study. Medicine (Baltimore) 2016; 95:e4269. [PMID: 27428241 PMCID: PMC4956835 DOI: 10.1097/md.0000000000004269] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
General anesthesia (GA) has been used for second line treatment strategy for status asthmaticus in pediatric patients. The association between GA in children and risk of followed-up allergic diseases is unclear. This study aims to assess the risk of allergic diseases after GA in children.We did a nationwide retrospective cohort study by analyzing data from the National Health Insurance Research Database (NHIRD) in Taiwan. The subsequent risks for allergic diseases, including asthma (ICD-9: 493.X), allergic rhinitis (AR; ICD-9 CM code 477.X), and atopic dermatitis (AD; ICD-9-CM code 691.X), were compared between exposure to GA and none before 1 year of age throughout the follow-up period using the Cox proportional hazards model.Insurance claims data for 32,742 children younger than 1 year old from all insured children in the NHIRD. Of those, 2358 subjects were exposed to GA; 414 and 1944 children exposed to mask and intubation ventilation, respectively, served as the study cohort, whereas the remaining 30,384 children made up the comparison cohort. Children in the GA group were at a lower risk of developing asthma, AR and AD, with adjusted hazard ratios of 0.67 (0.62-0.72, 95%CI), 0.72 (0.68-0.77, 95%CI), 0.60 (0.56-0.64, 95%CI), respectively.Children who were exposed to GA in early life before 1 year of age had reduced risk of subsequently developing allergic diseases such as asthma, AD, and AR, when compared with general population.
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Affiliation(s)
- Ho-Chang Kuo
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung
- Kawasaki Disease Center, Kaohsiung Chang Gung Memorial Hospital, Taiwan University
| | - Ya-Ling Yang
- Department of Anesthesiology, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung
| | - Shu-Chen Ho
- Department of Public Health, College of Health Sciences, Kaohsiung Medical University
| | - Mindy Ming-Huey Guo
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung
- Kawasaki Disease Center, Kaohsiung Chang Gung Memorial Hospital, Taiwan University
| | - Jyun-Hong Jiang
- Department of Surgery, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Ying-Hsien Huang
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital and Chang Gung University College of Medicine, Kaohsiung
- Kawasaki Disease Center, Kaohsiung Chang Gung Memorial Hospital, Taiwan University
- Correspondence: Ying-Hsien Huang, Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Taiwan, #123 Ta-Pei Road, Niaosung, Kaohsiung, Taiwan (e-mail: )
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33
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Chen T, Liu HX, Yan HY, Wu DM, Ping J. Developmental origins of inflammatory and immune diseases. Mol Hum Reprod 2016; 22:858-65. [PMID: 27226490 DOI: 10.1093/molehr/gaw036] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 05/18/2016] [Indexed: 12/23/2022] Open
Abstract
Epidemiological and experimental animal studies show that suboptimal environments in fetal and neonatal life exert a profound influence on physiological function and risk of diseases in adult life. The concepts of the 'developmental programming' and Developmental Origins of Health and Diseases (DOHaD) have become well accepted and have been applied across almost all fields of medicine. Adverse intrauterine environments may have programming effects on the crucial functions of the immune system during critical periods of fetal development, which can permanently alter the immune function of offspring. Immune dysfunction may in turn lead offspring to be susceptible to inflammatory and immune diseases in adulthood. These facts suggest that inflammatory and immune disorders might have developmental origins. In recent years, inflammatory and immune disorders have become a growing health problem worldwide. However, there is no systematic report in the literature on the developmental origins of inflammatory and immune diseases and the potential mechanisms involved. Here, we review the impacts of adverse intrauterine environments on the immune function in offspring. This review shows the results from human and different animal species and highlights the underlying mechanisms, including damaged development of cells in the thymus, helper T cell 1/helper T cell 2 balance disturbance, abnormal epigenetic modification, effects of maternal glucocorticoid overexposure on fetal lymphocytes and effects of the fetal hypothalamic-pituitary-adrenal axis on the immune system. Although the phenomena have already been clearly implicated in epidemiologic and experimental studies, new studies investigating the mechanisms of these effects may provide new avenues for exploiting these pathways for disease prevention.
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Affiliation(s)
- Ting Chen
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Han-Xiao Liu
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Hui-Yi Yan
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Dong-Mei Wu
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
| | - Jie Ping
- Department of Pharmacology, Wuhan University School of Basic Medical Sciences, Wuhan 430071, China
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34
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Serini S, Ottes Vasconcelos R, Fasano E, Calviello G. Epigenetic regulation of gene expression and M2 macrophage polarization as new potential omega-3 polyunsaturated fatty acid targets in colon inflammation and cancer. Expert Opin Ther Targets 2016; 20:843-58. [PMID: 26781478 DOI: 10.1517/14728222.2016.1139085] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
INTRODUCTION It has become increasingly clear that dietary habits may affect the risk/progression of chronic diseases with a pathogenic inflammatory component, such as colorectal cancer. Considerable attention has been directed toward the ability of nutritional agents to target key molecular pathways involved in these inflammatory-related diseases. AREAS COVERED ω-3 Polyunsaturated fatty acids (PUFA) and their oxidative metabolites have attracted considerable interest as possible anti-inflammatory and anti-cancer agents, especially in areas such as the large bowel, where the influence of orally introduced substances is high and tumors show deranged PUFA patterns. On this basis, we have analyzed pre-clinical findings that have recently revealed new insight into the molecular pathways targeted by ω-3 PUFA. EXPERT OPINION The findings analyzed herein demonstrate that ω-3 PUFA may exert beneficial effects by targeting the epigenetic regulation of gene expression and altering M2 macrophage polarization during the inflammatory response. These mechanisms need to be better explored in the large bowel, and further studies could better clarify their role and the potential of dietary interventions with ω-3 PUFA in the large bowel. The epigenomic mechanism is discussed in view of the potential of ω-3 PUFA to enhance the efficacy of other agents used in the therapy of colorectal cancer.
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Affiliation(s)
- Simona Serini
- a Institute of General Pathology , Università Cattolica del Sacro Cuore , Rome , Italy
| | - Renata Ottes Vasconcelos
- a Institute of General Pathology , Università Cattolica del Sacro Cuore , Rome , Italy.,b Institute of Biological Sciences , Federal University of Rio Grande - FURG , Rio Grande , Brazil
| | - Elena Fasano
- c Department of Internal Medicine, Unit of Medical Oncology , Università Cattolica del Sacro Cuore , Rome , Italy
| | - Gabriella Calviello
- a Institute of General Pathology , Università Cattolica del Sacro Cuore , Rome , Italy
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35
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Bodajko-Grochowska A, Bednarek A, Markut-Miotła E. Asthma in children - current recommendations and education options for nurses. PIELEGNIARSTWO XXI WIEKU / NURSING IN THE 21ST CENTURY 2015. [DOI: 10.12923/p21w-2015-3/35] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/16/2023]
Abstract
Introduction. Poland’s accession to the European Union led to huge alterations in the way the professions of a nurse or midwife are being perceived. Such changes were obligatory, since the Polish legal regulations should have complied with those issued by the EC. Nurses are expected to permanently upgrade their skills as well as keep their general and occupational knowledge up to date. Possessing both professional and interpersonal skills is particularly important for providing care to a chronically ill child. The most crucial activities performed by nurses/midwives include educational and preventive actions, since they play a great role in the therapeutic process of a pediatric patient.
Aim. The aim of the article was to describe the current knowledge and recommendations of diagnosis, treatment and prevention of the most common chronic diseases in children, such as asthma. The study also discusses available forms of nursing care provided to children with asthma.
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Affiliation(s)
- Anna Bodajko-Grochowska
- Klinika Chorób Płuc i Reumatologii Dziecięcej II Katedry Pediatrii Uniwersytet Medyczny w Lublinie
| | - Anna Bednarek
- Studenckie Koło Naukowe przy Katedrze i Zakładzie Pielęgniarstwa Pediatrycznego Wydział Nauk o Zdrowiu, Uniwersytet Medyczny w Lublinie
| | - Ewa Markut-Miotła
- Katedra i Zakład Pielęgniarstwa Pediatrycznego, Wydział Nauk o Zdrowiu Uniwersytet Medyczny w Lublinie
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36
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West CE, Jenmalm MC, Prescott SL. The gut microbiota and its role in the development of allergic disease: a wider perspective. Clin Exp Allergy 2015; 45:43-53. [PMID: 24773202 DOI: 10.1111/cea.12332] [Citation(s) in RCA: 125] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
The gut microbiota are critical in the homoeostasis of multiple interconnected host metabolic and immune networks. If early microbial colonization is delayed, the gut-associated lymphoid tissues (GALT) fail to develop, leading to persistent immune dysregulation in mice. Microbial colonization has also been proposed as a major driver for the normal age-related maturation of both Th1 and T regulatory (Treg) pathways that appear important in suppressing early propensity for Th2 allergic responses. There is emerging evidence that resident symbionts induce tolerogenic gut-associated Treg cells and dendritic cells that ensure the preferential growth of symbionts; keeping pathogenic strains in check and constraining proinflammatory Th1, Th2, and Th17 clones. Some effects of symbionts are mediated by short-chain fatty acids, which play a critical role in mucosal integrity and local and systemic metabolic function and stimulate the regulatory immune responses. The homoeostatic IL-10/TGF-β dominated tolerogenic response within the GALT also signals the production of secretory IgA, which have a regulating role in mucosal integrity. Contrary to the 'sterile womb' paradigm, recent studies suggest that maternal microbial transfer to the offspring begins during pregnancy, providing a pioneer microbiome. It is likely that appropriate microbial stimulation both pre- and postnatally is required for optimal Th1 and Treg development to avoid the pathophysiological processes leading to allergy. Disturbed gut colonization patterns have been associated with allergic disease, but whether microbial variation is the cause or effect of these diseases is still under investigation. We are far from understanding what constitutes a 'healthy gut microbiome' that promotes tolerance. This remains a major limitation and might explain some of the inconsistency in human intervention studies with prebiotics and probiotics. Multidisciplinary integrative approaches with researchers working in networks, using harmonized outcomes and methodologies, are needed to advance our understanding in this field.
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Affiliation(s)
- C E West
- International Inflammation (in-FLAME) network of the World Universities Network, Umeå, Sweden; Department of Clinical Sciences, Pediatrics, Umeå University, Umeå, Sweden
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37
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Amarasekera M, Noakes P, Strickland D, Saffery R, Martino DJ, Prescott SL. Epigenome-wide analysis of neonatal CD4(+) T-cell DNA methylation sites potentially affected by maternal fish oil supplementation. Epigenetics 2015; 9:1570-6. [PMID: 25484023 DOI: 10.4161/15592294.2014.983366] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Supplementation of fish oil rich in omega-3 polyunsaturated fatty acids (n-3 PUFA) during pregnancy has been shown to confer favorable health outcomes in the offspring. In a randomized controlled trial, we have previously shown that n-3 PUFA supplementation in pregnancy was associated with modified immune responses and some markers of immune maturation. However, the molecular mechanisms underlying these heritable effects are unclear. To determine whether the biological effects of maternal n-3 PUFA supplementation are mediated through DNA methylation, we analyzed CD4(+) T-cells purified from cryo-banked cord blood samples from a previously conducted clinical trial. Of the 80 mother-infant pairs that completed the initial trial, cord blood samples of 70 neonates were available for genome-wide DNA methylation profiling. Comparison of purified total CD4(+) T-cell DNA methylation profiles between the supplement and control groups did not reveal any statistically significant differences in CpG methylation, at the single-CpG or regional level. Effect sizes among top-ranked probes were lower than 5% and did not warrant further validation. Tests for association between methylation levels and key n-3 PUFA parameters, docosahexaenoic acid (DHA), eicosapentaenoic acid (EPA), or total n-3 PUFAs were suggestive of dose-dependent effects, but these did not reach genome-wide significance. Our analysis of the microarray data did not suggest strong modifying effects of in utero n-3 PUFA exposure on CD4(+) T-cell methylation profiles, and no probes on the array met our criteria for further validation. Other epigenetic mechanisms may be more relevant mediators of functional effects induced by n-3 PUFA in early life.
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Affiliation(s)
- Manori Amarasekera
- a School of Pediatrics and Child Health ; University of Western Australia ; Perth , Australia
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38
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van Berkel AC, den Dekker HT, Jaddoe VWV, Reiss IK, Gaillard R, Hofman A, de Jongste JC, Duijts L. Mode of delivery and childhood fractional exhaled nitric oxide, interrupter resistance and asthma: the Generation R study. Pediatr Allergy Immunol 2015; 26:330-6. [PMID: 25845270 DOI: 10.1111/pai.12385] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/31/2015] [Indexed: 12/31/2022]
Abstract
BACKGROUND Previous studies suggest that caesarean section may influence the risk of childhood asthma. We examined the associations of different modes of delivery with childhood wheezing patterns, asthma, fractional exhaled nitric oxide (FeNO) and airway interrupter resistance (Rint) up to school age. METHODS This study among 6,128 children was embedded in a population-based prospective cohort study. Information on mode of delivery was obtained from midwives and hospital registries. Wheezing patterns from birth onwards and ever physician-diagnosed asthma at age 6 yr were assessed by questionnaires. FeNO and Rint were measured at age 6 yr. We used multivariate polynomial, logistic and linear regression models. RESULTS Compared with vaginal delivery, caesarean section was associated with increased risks of early and persistent wheezing up to school age [odds ratios (95% confidence interval): 1.36 (1.06, 1.75) and 1.73 (1.24, 2.40), respectively]. The effect sizes of elective and emergency caesarean section with wheezing outcomes were similar. Only elective caesarean section was associated with a higher FeNO level [sympercent (95% CI): 12.7 (0.6, 24.8)]. We did not observe associations of mode of delivery with asthma or Rint. Also, vacuum- or forceps-assisted vaginal delivery was not associated with any asthma or related outcome. CONCLUSIONS Both elective and emergency caesarean sections are associated with increased risks of early and persistent wheezing up to school age. This might be explained by increased airway inflammation reflected by higher FeNO levels.
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Affiliation(s)
- Annemaria C van Berkel
- The Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands.,Division of Respiratory Medicine, Department of Paediatrics, Erasmus Medical Center, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Herman T den Dekker
- The Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands.,Division of Respiratory Medicine, Department of Paediatrics, Erasmus Medical Center, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Vincent W V Jaddoe
- The Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands.,Department of Paediatrics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Irwin K Reiss
- Division of Neonatology, Department of Paediatrics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Romy Gaillard
- The Generation R Study Group, Erasmus Medical Center, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Albert Hofman
- Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Johan C de Jongste
- Division of Respiratory Medicine, Department of Paediatrics, Erasmus Medical Center, Rotterdam, The Netherlands
| | - Liesbeth Duijts
- Division of Respiratory Medicine, Department of Paediatrics, Erasmus Medical Center, Rotterdam, The Netherlands.,Department of Epidemiology, Erasmus Medical Center, Rotterdam, The Netherlands.,Division of Neonatology, Department of Paediatrics, Erasmus Medical Center, Rotterdam, The Netherlands
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39
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McFadden J, Thyssen J, Basketter D, Puangpet P, Kimber I. T helper cell 2 immune skewing in pregnancy/early life: chemical exposure and the development of atopic disease and allergy. Br J Dermatol 2015; 172:584-91. [DOI: 10.1111/bjd.13497] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/21/2014] [Indexed: 12/28/2022]
Affiliation(s)
- J.P. McFadden
- Department of Cutaneous Allergy; St John's Institute of Dermatology; Kings College; St Thomas Hospital; London SE1 7EH U.K
| | - J.P. Thyssen
- National Allergy Research Centre, Department of Dermatology and Allergology; Gentofte University Hospital; Hellerup DK 2900 Denmark
| | | | | | - I. Kimber
- Faculty of Life Sciences; University of Manchester; Manchester U.K
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40
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Maas T, Nieuwhof C, Passos VL, Robertson C, Boonen A, Landewé RB, Voncken JW, Knottnerus JA, Damoiseaux JG. Transgenerational occurrence of allergic disease and autoimmunity: general practice-based epidemiological research. PRIMARY CARE RESPIRATORY JOURNAL : JOURNAL OF THE GENERAL PRACTICE AIRWAYS GROUP 2014; 23:14-21. [PMID: 24449016 PMCID: PMC6442276 DOI: 10.4104/pcrj.2013.00108] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Background: Corresponding with the T helper cell type 1/T helper cell type 2 hypothesis, autoimmune and allergic diseases are considered pathologically distinct and mutually exclusive conditions. Co-occurrence of autoimmune disorders and allergy within patients, however, has been reported. Transgenerational co-occurrence of autoimmune and allergic disease has been less often described and may differ from the intra-patient results. Aims: To test the hypothesis that autoimmune disorders in parents are a risk factor for the development of an allergic disease in their offspring. Methods: Prospectively registered (by academic general practitioners) International Classifications of Primary Care (ICPC) for diagnoses of autoimmune disorders and allergy within families were evaluated (n=5,604 families) by performing multiple logistic regression analyses. Results: The presence of any ICPC-encoded autoimmune disorder in fathers appeared to be associated with an increased risk in their eldest children of developing an allergy (odds ratio (OR) 1.4, 95% CI 1.042 to 1.794). Psoriasis in fathers was particularly shown to be of influence (OR 1.5, 95% CI 1.061 to 2.117) and, although any ICPC-encoded autoimmune disease in mothers was found not to be of significance, the combined international code for registering rheumatoid arthritis/ankylosing spondylitis in mothers was OR 1.7 (95% CI 1.031 to 2.852). Conclusions: The occurrence of ICPC-encoded autoimmune disorders in parents, especially psoriasis and rheumatoid arthritis/ankylosing spondylitis, significantly increases the occurrence of allergic disease in their children. After validation in follow-up research in a larger sample, these results may lead to the inclusion of ‘parental autoimmune condition’ as a risk factor in the general practitioner's diagnostics of allergic disease.
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Affiliation(s)
- Tanja Maas
- Department of General Practice, Maastricht University, CAPHRI, Maastricht, The Netherlands
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Kuo HC, Guo MMH, Liu SF, Chen CC, Sheen JM, Yu HR, Tiao MM, Tain YL, Huang LT. Cross-fostering increases TH1/TH2 expression in a prenatal dexamethasone exposure rat model. PLoS One 2014; 9:e115554. [PMID: 25526616 PMCID: PMC4272273 DOI: 10.1371/journal.pone.0115554] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2014] [Accepted: 11/25/2014] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Prenatal dexamethasone exposure has been reported to increase allergy potential in childhood possibly by interference with normal immunological development in utero. This study investigated the effects of prenatal dexamethasone on T helper cell immune responses in a rat model. METHODS Pregnant rats received either dexamethasone 0.1 mg/kg/day or normal saline from gestational day 14-21. Off-springs were cared for by their biological mother, or cross-fostered by the opposing group. Spleen and blood samples were collected at post-natal day 7 and 120 and tested for mRNA expression and plasma cytokine levels of Th1/Th2/Th17 immune response. RESULTS Both Th1 (T-bet) and Th2 (GATA-3) mRNA expression were shown to have a significant increase in the prenatal dexamethasone exposure group at day 120 (p<0.05). The plasma levels for Th1 (IFNγ and IL-2) and Th2 (IL-4, IL-5, IL-13) were found to have no significant differences between the two group (p>0.05). The mRNA expression of Th17 (RORγt) showed a significant decrease at post-natal day 120 as well as the plasma level of IL-17A at day 7 (11.21±1.67 vs. 6.23±1.06 pg/ml, p = 0.02). Cross-fostering by a dexamethasone exposed mother resulted in a significant increase in Th1/Th2 mRNA expression (p<0.05) and decrease of Th17. CONCLUSIONS Prenatal dexamethasone exposure increased Th1, Th2 and decreased Th17 expression. Cross-fostering by a dexamethasone exposed mother results in more prominent increase of Th1 and Th2 expression.
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Affiliation(s)
- Ho-Chang Kuo
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Mindy Ming-Huey Guo
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Shih-Feng Liu
- Department of Respiratory Therapy and Internal Medicine, Kaohsiung Chang Gung Memorial Hospital, and Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Chih-Cheng Chen
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Jiunn-Ming Sheen
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Hong-Ren Yu
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Mao-Meng Tiao
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - You-Lin Tain
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Chang Gung University College of Medicine, Kaohsiung, Taiwan
| | - Li-Tung Huang
- Department of Pediatrics, Kaohsiung Chang Gung Memorial Hospital, Kaohsiung, Taiwan
- Department of Traditional Chinese Medicine, Chang Gung University, Taoyuan, Taiwan
- * E-mail:
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Nadeau KC, Li Z, Farzan S, Koestler D, Robbins D, Fei DL, Malipatlolla M, Maecker H, Enelow R, Korrick S, Karagas MR. In utero arsenic exposure and fetal immune repertoire in a US pregnancy cohort. Clin Immunol 2014; 155:188-97. [PMID: 25229165 DOI: 10.1016/j.clim.2014.09.004] [Citation(s) in RCA: 59] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2014] [Revised: 09/02/2014] [Accepted: 09/04/2014] [Indexed: 12/25/2022]
Abstract
Arsenic has wide-ranging effects on human health and there is evidence that it alters the immune response by influencing CD4+/CD8+ T cell ratios, IL-2 cytokine levels, and the expression of immune-response genes. We investigated the impact of in utero environmental arsenic exposure on immune development and function in newborns participating in a pregnancy cohort in New Hampshire, U.S., where arsenic levels have exceeded the current EPA maximum contaminant level of 10 μg/L. Our results showed that maternal urinary arsenic concentrations were inversely related to absolute total CD45RA+ CD4+ cord blood CD69+ T cell counts (N=116, p=0.04) and positively associated with CD45RA+ CD69- CD294+ cell counts (p=0.01). In placental samples (N=70), higher in utero urinary arsenic concentrations were positively associated with the expression of IL1β (p=0.03). These data provide evidence that relatively low-level arsenic exposure in utero may alter the fetal immune system and lead to immune dysregulation.
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Affiliation(s)
- Kari C Nadeau
- Division of Immunology and Allergy, Stanford University, 730 Welch Road, Stanford, CA, USA.
| | - Zhigang Li
- Geisel School of Medicine at Dartmouth, 1 Rope Ferry Road, Hanover, NH 03755, USA.
| | - Shohreh Farzan
- Geisel School of Medicine at Dartmouth, 1 Rope Ferry Road, Hanover, NH 03755, USA.
| | - Devin Koestler
- Geisel School of Medicine at Dartmouth, 1 Rope Ferry Road, Hanover, NH 03755, USA.
| | - David Robbins
- University of Miami, Miller School of Medicine, 1600 NW 10th Ave #1140, Miami, FL 33136, USA.
| | - Dennis Liang Fei
- University of Miami, Miller School of Medicine, 1600 NW 10th Ave #1140, Miami, FL 33136, USA.
| | - Meena Malipatlolla
- Institute for Immunity, Transplantation, and Infection, Stanford University, 299 Campus Drive, Stanford, CA 94305, USA
| | - Holden Maecker
- Institute for Immunity, Transplantation, and Infection, Stanford University, 299 Campus Drive, Stanford, CA 94305, USA
| | - Richard Enelow
- Geisel School of Medicine at Dartmouth, 1 Rope Ferry Road, Hanover, NH 03755, USA.
| | - Susan Korrick
- Brigham and Women's Hospital, Department of Medicine, Channing Division of Network Medicine, Harvard Medical School, 181 Longwood Ave, Boston, MA 02115, USA; Harvard School of Public Health, Department of Environmental Health, 677 Huntington Ave, Boston, MA 02115, USA.
| | - Margaret R Karagas
- Geisel School of Medicine at Dartmouth, 1 Rope Ferry Road, Hanover, NH 03755, USA.
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Maslova E, Hansen S. Prenatal Dietary Determinants of Asthma and Related Allergic Disorders in Childhood. Curr Nutr Rep 2014. [DOI: 10.1007/s13668-014-0089-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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44
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Martinez de Tejada B. Antibiotic use and misuse during pregnancy and delivery: benefits and risks. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2014; 11:7993-8009. [PMID: 25105549 PMCID: PMC4143845 DOI: 10.3390/ijerph110807993] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Revised: 07/25/2014] [Accepted: 07/28/2014] [Indexed: 11/17/2022]
Abstract
Although pregnancy is considered as a physiological state, most pregnant women in developed countries receive multiple medications to prevent maternal or neonatal complications, with antibiotics among the most frequently prescribed. During pregnancy, antibiotics are often prescribed in the context of preterm labor, intrapartum fever, prevention of neonatal Group B Streptococcus fever, and cesarean section. Outside this period, they are commonly prescribed in the community setting for respiratory, urinary, and ear, nose and throat infection symptoms. Whereas some of the current indications have insightful reasons to justify their use, potential risks related to overuse and misuse may surpass the benefits. Of note, the recent 2014 World Health Assembly expressed serious concern regarding antibiotic resistance due to antibiotic overuse and misuse and urged immediate action to combat antibiotic resistance on a global scale. Most studies in the obstetrics field have focused on the benefits of antibiotics for short-term maternal and neonatal complications, but with very little (if any) interest in long-term consequences.
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45
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Neonatal immunology: responses to pathogenic microorganisms and epigenetics reveal an "immunodiverse" developmental state. Immunol Res 2014; 57:246-57. [PMID: 24214026 DOI: 10.1007/s12026-013-8439-2] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Neonatal animals have heightened susceptibility to infectious agents and are at increased risk for the development of allergic diseases, such as asthma. Experimental studies using animal models have been quite useful for beginning to identify the cellular and molecular mechanisms underlying these sensitivities. In particular, results from murine neonatal models indicate that developmental regulation of multiple immune cell types contributes to the typically poor responses of neonates to pathogenic microorganisms. Surprisingly, however, animal studies have also revealed that responses at mucosal surfaces in early life may be protective against primary or secondary disease. Our understanding of the molecular events underlying these processes is less well developed. Emerging evidence indicates that the functional properties of neonatal immune cells and the subsequent maturation of the immune system in ontogeny may be regulated by epigenetic phenomena. Here, we review recent findings from our group and others describing cellular responses to infection and developmentally regulated epigenetic processes in the newborn.
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Zetstra-van der Woude PA, De Walle HEK, Hoek A, Bos HJ, Boezen HM, Koppelman GH, de Jong-van den Berg LTW, Scholtens S. Maternal high-dose folic acid during pregnancy and asthma medication in the offspring. Pharmacoepidemiol Drug Saf 2014; 23:1059-65. [PMID: 24930442 DOI: 10.1002/pds.3652] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 04/29/2014] [Accepted: 05/13/2014] [Indexed: 12/13/2022]
Abstract
PURPOSE Low-dose folic acid supplementation (0.5 mg) taken during pregnancy has been associated with an increased risk for childhood asthma. The effect of high-dose folic acid (5 mg) advised to women at risk for having a child with neural tube defect has not been assessed so far. Our aim was to investigate the effect of dispensed high-dose folic acid during pregnancy and asthma medication in the offspring. METHODS We used data from the pregnancy database IADB.nl, which contains pharmacy-dispensing data of mothers and children from community pharmacies in the Netherlands from 1994 until 2011. The dispension of asthma medication in children exposed in utero to high-dose folic acid was compared with children who were not exposed to this high dose. Incidence rate ratios (IRRs) with 95% confidence intervals (CIs) were calculated. RESULTS In 2.9% (N = 913) of the 39,602 pregnancies in the database, the mother was dispensed high-dose folic acid. Maternal high-dose folic acid was associated with an increased rate of asthma medication among children: recurrent asthma medication IRR = 1.14 (95%CI: 1.04-1.30) and recurrent inhaled corticosteroids IRR = 1.26 (95%CI: 1.07-1.47). Associations were clustered on the mother and adjusted for maternal age, maternal asthma medication, and dispension of benzodiazepines during pregnancy. CONCLUSION Almost 3% of the children were prenatally exposed to high-dose folic acid. This study suggests that supplementation of high-dose folic acid during pregnancy might increase the risk of childhood asthma.
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Wickens K, Stanley TV, Mitchell EA, Barthow C, Fitzharris P, Purdie G, Siebers R, Black PN, Crane J. Early supplementation with Lactobacillus rhamnosus HN001 reduces eczema prevalence to 6 years: does it also reduce atopic sensitization? Clin Exp Allergy 2014; 43:1048-57. [PMID: 23957340 DOI: 10.1111/cea.12154] [Citation(s) in RCA: 91] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 04/25/2013] [Accepted: 06/02/2013] [Indexed: 12/24/2022]
Abstract
BACKGROUND The role of probiotics in prevention of allergic disease is still not clear; efficacy may depend on the timing, dose, duration, and specific probiotic used. Using a double-blind randomized placebo-controlled trial (Australian New Zealand Clinical Trials Registry: ACTRN12607000518460), we have shown that in a high-risk birth cohort, maternal supplementation from 35 weeks gestation until 6 months if breastfeeding and infant supplementation from birth until 2 years with Lactobacillus rhamnosus HN001 (HN001) (6 × 10(9) cfu/day) halved the cumulative prevalence of eczema at 2 and 4 years. Bifidobacterium animalis subsp lactis HN019 (HN019) (9 × 10(9) cfu/day) had no significant effect. OBJECTIVE To determine whether differences in effects of HN001 and HN019 on eczema persist to age 6 years, and to investigate effects on sensitization. METHODS Standard procedures were used to assess eczema (The UK Working Party's Criteria), eczema severity (SCORAD), atopic sensitization [skin prick tests (SPT), total and specific IgE] and standard questions used for asthma, wheeze, and rhinoconjunctivitis. RESULTS HN001 was associated with significantly lower cumulative prevalence of eczema (HR = 0.56, 95% CI 0.39-0.80), SCORAD ≥ 10 (HR = 0.69, 0.49-0.98) and SPT sensitization (HR = 0.69, 95% CI 0.48-0.99). The point prevalence of eczema (RR = 0.66, 95% CI 0.44-1.00), SCORAD ≥ 10 (RR = 0.62, 95% CI 0.38-1.01) and SPT sensitization (RR = 0.72, 95% CI 0.53-1.00) were also reduced among children taking HN001. HN019 had no significant effect on any outcome. CONCLUSION AND CLINICAL RELEVANCE This study provides evidence for the efficacy of the probiotic L. rhamnosus HN001 in preventing the development of eczema and possibly also atopic sensitization in high risk infants to age 6 years. The absence of a similar effect for HN019 indicates that benefits may be species specific.
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Affiliation(s)
- K Wickens
- Wellington Asthma Research Group, Wellington School of Medicine and Health Sciences, University of Otago, Wellington, New Zealand.
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Kretschmer A, Möller G, Lee H, Laumen H, von Toerne C, Schramm K, Prokisch H, Eyerich S, Wahl S, Baurecht H, Franke A, Claussnitzer M, Eyerich K, Teumer A, Milani L, Klopp N, Hauck SM, Illig T, Peters A, Waldenberger M, Adamski J, Reischl E, Weidinger S. A common atopy-associated variant in the Th2 cytokine locus control region impacts transcriptional regulation and alters SMAD3 and SP1 binding. Allergy 2014; 69:632-42. [PMID: 24661001 DOI: 10.1111/all.12394] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/12/2014] [Indexed: 01/17/2023]
Abstract
BACKGROUND Type 2 immune responses directed by Th2 cells and characterized by the signature cytokines IL4, IL5, and IL13 play major pathogenic roles in atopic diseases. Single nucleotide polymorphisms in the human Th2 cytokine locus in particular in a locus control region within the DNA repair gene RAD50, containing several RAD50 DNase1-hypersensitive sites (RHS), have been robustly associated with atopic traits in genome-wide association studies (GWAS). Functional variants in IL13 have been intensely studied, whereas no causative variants for the IL13-independent RAD50 signal have been identified yet. This study aimed to characterize the functional impact of the atopy-associated polymorphism rs2240032 located in the human RHS7 on cis-regulatory activity and differential binding of transcription factors. METHODS Differential transcription factor binding was analyzed by electrophoretic mobility shift assays (EMSAs) with Jurkat T-cell nuclear extracts. Identification of differentially binding factors was performed using mass spectrometry (LC-MS/MS). Reporter vector constructs carrying either the major or minor allele of rs2240032 were tested for regulating transcriptional activity in Jurkat and HeLa cells. RESULTS The variant rs2240032 impacts transcriptional activity and allele-specific binding of SMAD3, SP1, and additional putative protein complex partners. We further demonstrate that rs2240032 is located in an RHS7 subunit which itself encompasses repressor activity and might be important for the fine-tuning of transcription regulation within this region. CONCLUSION The human RHS7 critically contributes to the regulation of gene transcription, and the common atopy-associated polymorphism rs2240032 impacts transcriptional activity and transcription factor binding.
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Brown SB, Reeves KW, Bertone-Johnson ER. Maternal folate exposure in pregnancy and childhood asthma and allergy: a systematic review. Nutr Rev 2014; 72:55-64. [PMID: 24551950 DOI: 10.1111/nure.12080] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Adequate folate status in early pregnancy is critical to prevent congenital malformations, yet little is known about whether exposure to folate, specifically folic acid supplementation beyond the recommended dose, influences chronic health outcomes. The link between maternal folate levels and risk of childhood asthma and allergic disease has been investigated in 10 large prospective cohort studies that reported conflicting results. While the majority of studies reported no association, those supporting a positive relationship found a small increase in risk that was generally transient in nature, confined to early childhood, and associated with folic acid supplementation in late pregnancy. This systematic review presents background information on maternal folate exposure and childhood asthma, synthesizes the current epidemiologic evidence in the context of the methodological differences among studies and their potential limitations, and offers direction for future research.
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Epigenetic modification of FOXP3 in patients with chronic HIV infection. J Acquir Immune Defic Syndr 2014; 65:19-26. [PMID: 23846566 DOI: 10.1097/qai.0b013e3182a1bca4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
OBJECTIVES HIV-1 modulates host cell epigenetic machinery to control its own replication and induce immune suppression. HIV-1 infection leads to activation of T regulatory cell (T(reg)), but the mechanism underlying this immune modulation is unclear. T(reg) plays a prominent role in gut-mucosal immune tolerance by restraining excessive effector T-cell responses, a mechanism that is known to be disturbed in chronic HIV-1 infection. DNA methylation plays a major role in T(reg) lineage commitment and immune homeostasis, which may be regulated by HIV. To investigate the mechanisms of aberrant methylation of the T(reg) marker FOXP3 in HIV-1 infection, we evaluated the expression pattern of methylation-related enzymes and its correlation to FOXP3 methylation. METHODS FOXP3 promoter methylation in the colon mucosa and peripheral blood from HIV-infected patients and control subjects was measured using Pyrosequencing. Gene expression pattern of DNA methylation enzymes in the colon mucosa was investigated by Microarray and quantitative reverse transcriptase-polymerase chain reaction analysis in the same subjects. RESULTS FOXP3 promoter was significantly (P ≤ 0.0001) demethylated in HIV-infected patients compared with control subjects in both tissues. Expression of DNA methyltransferase 1 (DNAMT1), DNA methyltransferase 1-associated protein 1(DMAP1), methyltransferase-like 7B (METTL7B), and methyltransferase-like 10 (METTL10) were significantly down regulated in HIV-infected patients compared with controls and had a significant positive correlation to FOXP3 promoter methylation. CONCLUSIONS We present evidence suggesting that altered methylation pattern of FOXP3 and accordingly higher T(reg) frequency in gut mucosa of HIV-infected patients may be because of aberrant methylation processing in HIV.
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