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Liu H, Liao J, Jiang Y, Zhang B, Yu H, Kang J, Hu C, Li Y, Xu S. Maternal exposure to fine particulate matter and the risk of fetal distress. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2019; 170:253-258. [PMID: 30529920 DOI: 10.1016/j.ecoenv.2018.11.068] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/13/2018] [Revised: 11/14/2018] [Accepted: 11/16/2018] [Indexed: 06/09/2023]
Abstract
Prenatal life exposure to fine particulate matter (aerodynamic diameter less than or equal to 2.5 µm, PM2.5) has been linked with increased risk of adverse fetal development and birth outcomes in previous studies. However, to our knowledge, no study has investigated the association of maternal PM2.5 with the risk of fetal distress, which is a harmful fetal status and may lead to fetal brain damage, even fetal death. Therefore, we conducted a study to determine the association between maternal PM2.5 and fetal distress among 7835 mother-infant pairs from a birth cohort, in Wuhan, China, 2013-2015. The individual daily PM2.5 level was assessed using land use regression model. We evaluated the association of maternal PM2.5 level over the whole pregnancy with fetal distress by logistic regression model, and estimated the risk between PM2.5 exposure in specific trimester and fetal distress using generalized estimating equations. We observed that per 10 µg/m3 change of maternal PM2.5 level over the whole pregnancy was associated with 25% increased risk of fetal distress (95% confidence interval: 1.09-1.44). Further, we found PM2.5 level in the 2nd trimester, but not in the 1st and 3rd trimesters, was associated with fetal distress. Stratified analyses indicated that the association was only significant among infants who were born in cold seasons. Our study suggested that PM2.5 exposure during the whole pregnancy exhibited significant associations with the risk of fetal distress, and exposure in the 2nd trimester maybe the susceptible window. Further stratified analyses indicated that birth season is a possible modifier in the association.
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Affiliation(s)
- Hongxiu Liu
- Key Laboratory of Environment and Health (HUST), Ministry of Education & Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China; State Key Laboratory of Environmental Health (Incubation), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China
| | - Jiaqiang Liao
- Key Laboratory of Environment and Health (HUST), Ministry of Education & Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China; State Key Laboratory of Environmental Health (Incubation), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China
| | - Yangqian Jiang
- Key Laboratory of Environment and Health (HUST), Ministry of Education & Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China; State Key Laboratory of Environmental Health (Incubation), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China
| | - Bin Zhang
- Women and Children Medical and Healthcare Center of Wuhan, Wuhan 430000, Hubei, China
| | - Huifang Yu
- Key Laboratory of Environment and Health (HUST), Ministry of Education & Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China; State Key Laboratory of Environmental Health (Incubation), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China
| | - Jiawei Kang
- Key Laboratory of Environment and Health (HUST), Ministry of Education & Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China; State Key Laboratory of Environmental Health (Incubation), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China
| | - Cheng Hu
- Key Laboratory of Environment and Health (HUST), Ministry of Education & Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China; State Key Laboratory of Environmental Health (Incubation), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China
| | - Yuanyuan Li
- Key Laboratory of Environment and Health (HUST), Ministry of Education & Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China; State Key Laboratory of Environmental Health (Incubation), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China
| | - Shunqing Xu
- Key Laboratory of Environment and Health (HUST), Ministry of Education & Ministry of Environmental Protection, School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China; State Key Laboratory of Environmental Health (Incubation), School of Public Health, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, Hubei, China.
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Zhang CM, Sun ZX, Wang ZL, Chen JS, Chang Z, Wang Z, Zhu L, Ma ZH, Peng YJ, Xu ZA, Wang SQ. Abnormal methylation of spermatozoa induced by benzo(a)pyrene in rats. Hum Exp Toxicol 2019; 38:846-856. [PMID: 30982342 DOI: 10.1177/0960327119836230] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Epigenetic mutations caused by pollutants are possibly linked to many diseases. Benzo(a)pyrene (BaP) is one of the most representative air pollutants and has aroused wide concern because of its strong carcinogenicity. The reproductive toxicity induced by BaP has been identified, but little is known about the characteristics of the methylation changes induced by BaP. In this study, a methylated DNA immunoprecipitation sequencing method was used to detect the methylation of sperm DNA of rats exposed to BaP. Compared with the respective genes in normal rats, there were 3227 hypomethylated genes and 828 hypermethylated genes after BaP exposure. Gene ontology enrichment analysis reported that differentially methylated genes (DMGs) were enriched in the localization, single-multicellular organism process and plasma membrane. Kyoto Encyclopedia of Genes and Genomes pathway analysis showed that the DMGs were significantly enriched in the Ras signalling pathway, Rap1 signalling pathway, pancreatic secretion and neuroactive ligand-receptor interaction. DisGeNET disease spectrum analysis showed that DMGs were associated with infertility and certain genetic diseases. Further research needs to be done to explore whether these abnormal methylation are transgenerational.
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Affiliation(s)
- C M Zhang
- 1 Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Z X Sun
- 2 Henan Province Hospital of Traditional Chinese Medicine, Zhengzhou, Henan, China
| | - Z L Wang
- 1 Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - J S Chen
- 2 Henan Province Hospital of Traditional Chinese Medicine, Zhengzhou, Henan, China
| | - Z Chang
- 1 Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Z Wang
- 2 Henan Province Hospital of Traditional Chinese Medicine, Zhengzhou, Henan, China
| | - L Zhu
- 1 Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Z H Ma
- 3 Pain Department of Henan Provincial Hospital, Zhengzhou, Henan, China
| | - Y J Peng
- 1 Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - Z A Xu
- 1 Henan University of Chinese Medicine, Zhengzhou, Henan, China
| | - S Q Wang
- 1 Henan University of Chinese Medicine, Zhengzhou, Henan, China
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Liu C, Li Q, Yan L, Wang H, Yu J, Tang J, Yao H, Li S, Zhang Y, Guo Y. The association between maternal exposure to ambient particulate matter of 2.5 μm or less during pregnancy and fetal congenital anomalies in Yinchuan, China: A population-based cohort study. ENVIRONMENT INTERNATIONAL 2019; 122:316-321. [PMID: 30455103 DOI: 10.1016/j.envint.2018.11.030] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2018] [Revised: 10/26/2018] [Accepted: 11/12/2018] [Indexed: 05/28/2023]
Abstract
BACKGROUND Few studies from western countries have linked prenatal exposure to ambient particulate matter <2.5 μm (PM2.5) with increased risk of congenital anomalies. However, the results are mixed. Particularly, evidence is limited for Chinese pregnant women. METHODS In this retrospective cohort study, we matched the data of all pregnant women laboured in public hospitals during 2015-2016 in Yinchuan, a capital city of northwest China and the data of daily average PM2.5, nitrogen dioxide (NO2), sulphur dioxide (SO2) and ozone (O3) concentrations of the nearest monitor station. We calculated a time-dependent exposure over the entire pregnancy for each woman. We used a time varying Cox proportional hazards model to explore the association between PM2.5 exposure and the risk of congenital anomalies, after adjusting for individual confounders and other pollutants. RESULTS A total of 39,386 singleton live births were included in the study, and 530 (1.35%) were with congenital anomalies. An increase of 10 μg/m3 in PM2.5 exposure over the entire pregnancy was significantly associated with increased risk of congenital anomalies, with hazard ratio (HR) of 1.35 [95% confidence interval (95%CI): 1.16, 1.58]. For subtype analyses, PM2.5 exposure exhibited a significant association with cardiac anomalies and other unclassifiable anomalies, with HRs of 1.60 (95%CI: 1.24, 2.08) and 1.42 (95%CI: 1.07, 1.89), respectively. The impacts of PM2.5 exposure on orofacial anomalies and musculoskeletal anomalies were not significant. CONCLUSION Our results indicate high concentration of PM2.5 could increase the risk of congenital anomalies among Chinese, especially for cardiac anomalies. Self-protective measures involving reducing PM2.5 pollution exposure during pregnancy as well as environmental policies aiming to restrict PM2.5 emission could be helpful to reduce the burden of cognitional anomalies.
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Affiliation(s)
- Can Liu
- Department of Scientific Research, Peking University Third Hospital, Beijing, China
| | - Qin Li
- Department of Maternal and Child Health, School of Public Health, Peking University, Beijing, China; Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
| | - Lailai Yan
- Department of Laboratorial Science and Technology, School of Public Health, Peking University, Beijing, China
| | - Huijun Wang
- Yinchuan Maternal and Child Health Care Hospital, Yinchuan, Ningxia, China
| | - Jing Yu
- Yinchuan Maternal and Child Health Care Hospital, Yinchuan, Ningxia, China
| | - Juxiang Tang
- Yinchuan Maternal and Child Health Care Hospital, Yinchuan, Ningxia, China
| | - Haiyan Yao
- Yinchuan Maternal and Child Health Care Hospital, Yinchuan, Ningxia, China
| | - Shanshan Li
- Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia.
| | - Yajuan Zhang
- Key Laboratory of Fertility Preservation and Maintenance of Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, School of Public Health and Management, Ningxia Medical University, Yinchuan, Ningxia, China.
| | - Yuming Guo
- Department of Epidemiology and Preventive Medicine, School of Public Health and Preventive Medicine, Monash University, Melbourne, Australia
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Alfano R, Herceg Z, Nawrot TS, Chadeau-Hyam M, Ghantous A, Plusquin M. The Impact of Air Pollution on Our Epigenome: How Far Is the Evidence? (A Systematic Review). Curr Environ Health Rep 2018; 5:544-578. [PMID: 30361985 DOI: 10.1007/s40572-018-0218-8] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
PURPOSE OF REVIEW This systematic review evaluated existing evidence linking air pollution exposure in humans to major epigenetic mechanisms: DNA methylation, microRNAs, long noncoding RNAs, and chromatin regulation. RECENT FINDINGS Eighty-two manuscripts were eligible, most of which were observational (85%), conducted in adults (66%) and based on DNA methylation (79%). Most observational studies, except panel, demonstrated modest effects of air pollution on the methylome. Panel and experimental studies revealed a relatively large number of significant methylome alterations, though based on smaller sample sizes. Particulate matter levels were positively associated in several studies with global or LINE-1 hypomethylation, a hallmark of several diseases, and with decondensed chromatin structure. Several air pollution species altered the DNA methylation clock, inducing accelerated biological aging. The causal nature of identified associations is not clear, however, especially that most originate from countries with low air pollution levels. Existing evidence, gaps, and perspectives are highlighted herein.
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Affiliation(s)
- Rossella Alfano
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium
| | - Zdenko Herceg
- Epigenetics Group, International Agency for Research on Cancer (IARC), 150 Cours Albert-Thomas, 69008, Lyon, France
| | - Tim S Nawrot
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium
- Environment & Health Unit, Leuven University, Leuven, Belgium
| | - Marc Chadeau-Hyam
- Department of Epidemiology and Biostatistics, The School of Public Health, Imperial College London, London, UK
| | - Akram Ghantous
- Epigenetics Group, International Agency for Research on Cancer (IARC), 150 Cours Albert-Thomas, 69008, Lyon, France.
| | - Michelle Plusquin
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium.
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Tian FY, Rifas-Shiman SL, Cardenas A, Baccarelli AA, DeMeo DL, Litonjua AA, Rich-Edwards JW, Gillman MW, Oken E, Hivert MF. Maternal corticotropin-releasing hormone is associated with LEP DNA methylation at birth and in childhood: an epigenome-wide study in Project Viva. Int J Obes (Lond) 2018; 43:1244-1255. [PMID: 30464231 PMCID: PMC6529291 DOI: 10.1038/s41366-018-0249-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 08/22/2018] [Accepted: 09/26/2018] [Indexed: 12/19/2022]
Abstract
Background: Corticotropin-releasing hormone (CRH) plays a central role in regulating the secretion of cortisol which controls a wide range of biological processes. Fetuses overexposed to cortisol have increased risks of disease in later life. DNA methylation may be the underlying association between prenatal cortisol exposure and health effects. We investigated associations between maternal CRH levels and epigenome-wide DNA methylation of cord blood in offsprings and evaluated whether these associations persisted into mid-childhood. Methods: We investigated mother-child pairs enrolled in the prospective Project Viva pre-birth cohort. We measured DNA methylation in 257 umbilical cord blood samples using the HumanMethylation450 Bead Chip. We tested associations of maternal CRH concentration with cord blood cells DNA methylation, adjusting the model for maternal age at enrollment, education, maternal race/ethnicity, pre-pregnancy body mass index, parity, gestational age at delivery, child sex, and cell-type composition in cord blood. We further examined the persistence of associations between maternal CRH levels and DNA methylation in children’s blood cells collected at mid-childhood (N = 239, age: 6.7–10.3 years) additionally adjusting for the children’s age at blood drawn. Results: Maternal CRH levels are associated with DNA methylation variability in cord blood cells at 96 individual CpG sites (False Discovery Rate < 0.05). Among the 96 CpG sites, we identified 3 CpGs located near the LEP gene. Regional analyses confirmed the association between maternal CRH and DNA methylation near LEP. Moreover, higher maternal CRH levels were associated with higher blood-cell DNA methylation of the promoter region of LEP in mid-childhood (P < 0.05, β = 0.64, SE = 0.30). Conclusion: In our cohort, maternal CRH was associated with DNA methylation levels in newborns at multiple loci, notably in the LEP gene promoter. The association between maternal CRH and LEP DNA methylation levels persisted into mid-childhood.
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Affiliation(s)
- Fu-Ying Tian
- Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA.,Department of Medical Statistics and Epidemiology, School of Public Health, Sun Yat-sen University, Guangzhou, Guangdong, China
| | - Sheryl L Rifas-Shiman
- Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA
| | - Andres Cardenas
- Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA
| | - Andrea A Baccarelli
- Department of Environmental Health Sciences, Columbia University Mailman School of Public Health, New York, NY, USA
| | - Dawn L DeMeo
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA
| | - Augusto A Litonjua
- Channing Division of Network Medicine, Department of Medicine, Brigham and Women's Hospital, Boston, MA, USA
| | - Janet W Rich-Edwards
- Connors Center for Women's Health and Gender Biology, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, USA.,Department of Epidemiology, Harvard T. H. Chan School of Public Health, Boston, MA, USA
| | - Matthew W Gillman
- Environmental Influences on Child Health Outcomes (ECHO) Office of the Director, National Institutes of Health, Department of Health and Human Services, Rockville, MD, USA
| | - Emily Oken
- Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA
| | - Marie-France Hivert
- Division of Chronic Disease Research Across the Lifecourse, Department of Population Medicine, Harvard Medical School and Harvard Pilgrim Health Care Institute, Boston, MA, USA. .,Diabetes Research Center, Massachusetts General Hospital, 50 Staniford Street, Boston, MA, USA. .,Department of Medicine, Université de Sherbrooke, Sherbrooke, Québec, Canada. .,Centre de recherche du Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Québec, Canada.
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56
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Hu P, Fan L, Ding P, He YH, Xie C, Niu Z, Tian FY, Yuan S, Jia D, Chen WQ. Association between prenatal exposure to cooking oil fumes and full-term low birth weight is mediated by placental weight. ENVIRONMENTAL RESEARCH 2018; 167:622-631. [PMID: 30172195 DOI: 10.1016/j.envres.2018.08.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/30/2018] [Revised: 08/08/2018] [Accepted: 08/09/2018] [Indexed: 06/08/2023]
Abstract
OBJECTIVE Evidence regarding the association between prenatal exposure to cooking oil fumes (COF) and full-term low birth weight (FTLBW) is still controversial, and the mechanism remains unclear. This study thus aims to explore the association of prenatal COF exposure with off-spring FT-LBW as well as the mediating role of placenta in their association. METHODS A case-control study enrolling 266 pregnant women delivering FTLBW newborns (cases) and 1420 delivering normal birth weight (NBW) newborns (controls) was conducted. Information on prenatal COF exposure, socio-demographics, and obstetric conditions were collected at the Women's and Children's Hospitals of Shenzhen and Foshan in Guangdong, China. Linear and hierarchical logistic regression models were undertaken to explore the associations among COF exposure, placenta and birth weight, as well as the mediation effect of placental weight. RESULTS After controlling for potential confounders, prenatal COF exposure was significantly associated with the higher risk of FT-LBW (OR = 1.31, 95% CI= 1.06-1.63) and the lower placental weight (ß = -0.12, 95% CI= -0.23 ~ -0.005). Compared with mothers who never cooked, those cooking sometimes (OR= 2.99, 95% CI= 1.48-6.04) or often (OR= 3.41, 95% CI= 1.40-8.34) showed a higher risk of FT-LBW, and likewise, those cooking for less than half an hour (OR= 2.08, 95% CI= 1.14-3.79) or cooking between half to an hour (OR= 2.48, 95% CI= 1.44-4.29) were also more likely to exhibit FT-LBW. Different cooking methods including pan-frying (OR= 2.24, 95% CI= 1.30-3.85) or deep-frying (OR= 1.78, 95% CI= 1.12-2.85) during pregnancy were associated with increased FT-LBW risks as well. The further mediation analysis illustrated that placental weight mediated 15.96% (95% CI: 12.81~28.80%) and 15.90% (95% CI= 14.62%~16.66%) of the associations of cooking during pregnancy and frequency of prenatal COF exposure, respectively, with FT-LBW.
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Affiliation(s)
- Pian Hu
- Department of Medical Statistics and Epidemiology, Guangzhou Key Laboratory of Environmental Pollution and Health Assessment,Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou,China
| | - Lijun Fan
- Department of Medical Statistics and Epidemiology, Guangzhou Key Laboratory of Environmental Pollution and Health Assessment,Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou,China
| | - Peng Ding
- Department of Medical Statistics and Epidemiology, Guangzhou Key Laboratory of Environmental Pollution and Health Assessment,Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou,China
| | - Yan-Hui He
- Department of Medical Statistics and Epidemiology, Guangzhou Key Laboratory of Environmental Pollution and Health Assessment,Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou,China
| | - Chuanbo Xie
- Department of Medical Statistics and Epidemiology, Guangzhou Key Laboratory of Environmental Pollution and Health Assessment,Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou,China
| | - Zhongzheng Niu
- Department of Medical Statistics and Epidemiology, Guangzhou Key Laboratory of Environmental Pollution and Health Assessment,Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou,China
| | - Fu-Ying Tian
- Department of Medical Statistics and Epidemiology, Guangzhou Key Laboratory of Environmental Pollution and Health Assessment,Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou,China
| | - Shixin Yuan
- Shenzhen Women's and Children's Hospital, Shenzhen, China
| | - Deqin Jia
- Foshan Women's and Children's Hospital, Foshan, China
| | - Wei-Qing Chen
- Department of Medical Statistics and Epidemiology, Guangzhou Key Laboratory of Environmental Pollution and Health Assessment,Guangdong Provincial Key Laboratory of Food, Nutrition and Health, School of Public Health, Sun Yat-Sen University, Guangzhou,China; Department of Information Management, Xinhua College, Sun Yat-Sen University, Guangzhou, China.
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57
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Luyten LJ, Saenen ND, Janssen BG, Vrijens K, Plusquin M, Roels HA, Debacq-Chainiaux F, Nawrot TS. Air pollution and the fetal origin of disease: A systematic review of the molecular signatures of air pollution exposure in human placenta. ENVIRONMENTAL RESEARCH 2018; 166:310-323. [PMID: 29908461 DOI: 10.1016/j.envres.2018.03.025] [Citation(s) in RCA: 63] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/05/2018] [Revised: 03/13/2018] [Accepted: 03/14/2018] [Indexed: 05/24/2023]
Abstract
BACKGROUND Fetal development is a crucial window of susceptibility in which exposure-related alterations can be induced on the molecular level, leading to potential changes in metabolism and development. The placenta serves as a gatekeeper between mother and fetus, and is in contact with environmental stressors throughout pregnancy. This makes the placenta as a temporary organ an informative non-invasive matrix suitable to investigate omics-related aberrations in association with in utero exposures such as ambient air pollution. OBJECTIVES To summarize and discuss the current evidence and define the gaps of knowledge concerning human placental -omics markers in association with prenatal exposure to ambient air pollution. METHODS Two investigators independently searched the PubMed, ScienceDirect, and Scopus databases to identify all studies published until January 2017 with an emphasis on epidemiological research on prenatal exposure to ambient air pollution and the effect on placental -omics signatures. RESULTS From the initial 386 articles, 25 were retained following an a priori set inclusion and exclusion criteria. We identified eleven studies on the genome, two on the transcriptome, five on the epigenome, five on the proteome category, one study with both genomic and proteomic topics, and one study with both genomic and transcriptomic topics. Six studies discussed the triple relationship between exposure to air pollution during pregnancy, the associated placental -omics marker(s), and the potential effect on disease development later in life. So far, no metabolomic or exposomic data discussing associations between the placenta and prenatal exposure to air pollution have been published. CONCLUSIONS Integration of placental biomarkers in an environmental epidemiological context enables researchers to address fundamental questions essential in unraveling the fetal origin of disease and helps to better define the pregnancy exposome of air pollution.
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Affiliation(s)
- Leen J Luyten
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium; Unité de Recherche en Biologie Cellulaire (URBC) - Namur Research Institute for Life Sciences (Narilis), University of Namur, Belgium
| | - Nelly D Saenen
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium
| | - Bram G Janssen
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium
| | - Karen Vrijens
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium
| | - Michelle Plusquin
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium
| | - Harry A Roels
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium; Louvain Centre for Toxicology and Applied Pharmacology, Université catholique de Louvain, Brussels, Belgium
| | - Florence Debacq-Chainiaux
- Unité de Recherche en Biologie Cellulaire (URBC) - Namur Research Institute for Life Sciences (Narilis), University of Namur, Belgium
| | - Tim S Nawrot
- Centre for Environmental Sciences, Hasselt University, Hasselt, Belgium; Department of Public Health & Primary Care, Occupational and Environmental Medicine, Leuven University (KULeuven), Leuven, Belgium.
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58
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Chen Q, Dai W, Sun Y, Zhao F, Liu J, Liu H. Methionine Partially Replaced by Methionyl-Methionine Dipeptide Improves Reproductive Performance over Methionine Alone in Methionine-Deficient Mice. Nutrients 2018; 10:nu10091190. [PMID: 30200399 PMCID: PMC6165284 DOI: 10.3390/nu10091190] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 08/13/2018] [Accepted: 08/27/2018] [Indexed: 11/23/2022] Open
Abstract
Decreased protein breakdown in pregnant women results in lower concentration of methionine (Met) in plasma, causing pregnancy-related metabolic disturbance. Its dipeptide methionyl-methionine (Met-Met) may exert positive influence in fetal development. This study mainly investigated whether Met-Met can be used as part of free Met to promote reproductive outcomes in mice and the underlying mechanisms. Met-deficient pregnant mice were treated with Met alone or with Met-Met during pregnancy. Daily intraperitoneal injection of 35% dietary Met in pregnant mice was the best dose among the 15–45% doses. Embryo development and newborn birth weight were enhanced when 25% of the Met in the 35% Met group was replaced with Met-Met. Met-Met replacement had higher plasma insulin, glucose, and free amino acids (AA) concentrations. Besides, in the placenta, the AA transporter mRNA abundances and peptide transporters (PhT1 and PepT1) protein levels were higher in Met-Met treatment group. Moreover, Met-Met increased 4E-BP1, S6K1 and AKT/mTOR phosphorylation. These results suggest that Met-Met could be used as a partial source of Met to promote reproductive outcomes in Met-restricted pregnant mice, which might be mediated by promoting nutrient availability and activating AKT/mTOR-mediated signaling pathway.
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Affiliation(s)
- Qiong Chen
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Wenting Dai
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Yalu Sun
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Fengqi Zhao
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
- Department of Animal and Veterinary Sciences, University of Vermont, Burlington, VT 05405, USA.
| | - Jianxin Liu
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
| | - Hongyun Liu
- College of Animal Sciences, Zhejiang University, Hangzhou 310058, China.
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Air pollution during pregnancy and placental adaptation in the levels of global DNA methylation. PLoS One 2018; 13:e0199772. [PMID: 29979694 PMCID: PMC6034814 DOI: 10.1371/journal.pone.0199772] [Citation(s) in RCA: 75] [Impact Index Per Article: 12.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Accepted: 06/13/2018] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Health in early life is crucial for health later in life. Exposure to air pollution during embryonic and early-life development can result in placental epigenetic modification and foetus reprogramming, which can influence disease susceptibility in later life. Objectives: The aim of this paper was to investigate the placental adaptation in the level of global DNA methylation and differential gene expression in the methylation cycle in new-borns exposed to high fine particulate matter in the foetal stage. STUDY DESIGN This is a nested case-control study. We enrolled pregnant healthy women attending prenatal care clinics in Tehran, Iran, who were residents of selected polluted and unpolluted regions, before the 14th week of pregnancy. We calculated the regional background levels of particle mass- particles with aerodynamics diameter smaller than 2.5 μm (PM2.5) and 10 μm (PM10)-of two regions of interest. At the time of delivery, placental tissue was taken for gene expression and DNA methylation analyses. We also recorded birth outcomes (the new-born's sex, birth date, birth weight and length, head and chest circumference, gestational age, Apgar score, and level of neonatal care required). RESULTS As regards PM2.5 and PM10 concentrations in different time windows of pregnancy, there were significantly independent positive correlations between PM10 and PM2.5 in the first trimester of all subjects and placental global DNA methylation levels (p-value = 0.01, p-value = 0.03, respectively). The gene expression analysis showed there was significant correlation between S-adenosylmethionine expression and PM2.5 (p = 0.003) and PM10 levels in the first trimester (p = 0.03). CONCLUSION Our data showed prenatal exposures to air pollutants in the first trimester could influence placental adaptation by DNA methylation.
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Alderete TL, Song AY, Bastain T, Habre R, Toledo-Corral CM, Salam MT, Lurmann F, Gilliland FD, Breton C. Prenatal traffic-related air pollution exposures, cord blood adipokines and infant weight. Pediatr Obes 2018; 13:348-356. [PMID: 29098799 PMCID: PMC5934325 DOI: 10.1111/ijpo.12248] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2017] [Revised: 08/16/2017] [Accepted: 08/21/2017] [Indexed: 01/24/2023]
Abstract
OBJECTIVE Studies suggest that prenatal exposure to traffic-related air pollution (TRAP) may contribute to childhood obesity. While exact mechanisms for this association are unknown, circulating adipokines are hypothesized to contribute to early-life weight gain. METHODS The Maternal and Child Health Study birth cohort included 136 women from the Los Angeles County + University of Southern California Medical Center. This study estimated prenatal residential TRAP exposure and used linear regression analysis to examine associations between adipokines with TRAP exposure and infant weight change (birth to 6 months). RESULTS A one standard deviation (1-SD: 2 ppb) increase in prenatal non-freeway nitrogen oxides was associated with 33% (P = 0.01) higher leptin and 9% higher high molecular weight adiponectin levels (P = 0.07) in cord blood. Leptin levels were 71% higher in mothers who lived <75 m than those living >300 m from major roadways (P = 0.03). A 1-SD (10 ng mL-1 ) increase in leptin was associated with a significant increase in infant weight change in female infants (0.62 kg, P = 0.02) but not male infants (0.11 kg, P = 0.48). CONCLUSIONS Higher TRAP exposures were associated with higher cord blood levels of leptin and high molecular weight adiponectin. These adipokines were associated with increased infant weight change in female infants, which may have implications for future obesity risk.
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Affiliation(s)
- Tanya L. Alderete
- University of Southern California, Department of Preventive Medicine, Division of Environmental Health, Los Angeles, California, USA
| | - Ashley Y. Song
- University of Southern California, Department of Preventive Medicine, Division of Environmental Health, Los Angeles, California, USA
| | - Theresa Bastain
- University of Southern California, Department of Preventive Medicine, Division of Environmental Health, Los Angeles, California, USA
| | - Rima Habre
- University of Southern California, Department of Preventive Medicine, Division of Environmental Health, Los Angeles, California, USA
| | - Claudia M. Toledo-Corral
- California State University, Los Angeles, Department of Public Health, Los Angeles California, USA
| | - Muhammad T. Salam
- Kern Medical, University of Southern California, Los Angeles, California, USC
| | | | - Frank D. Gilliland
- University of Southern California, Department of Preventive Medicine, Division of Environmental Health, Los Angeles, California, USA
| | - Carrie Breton
- University of Southern California, Department of Preventive Medicine, Division of Environmental Health, Los Angeles, California, USA
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Plusquin M, Chadeau-Hyam M, Ghantous A, Alfano R, Bustamante M, Chatzi L, Cuenin C, Gulliver J, Herceg Z, Kogevinas M, Nawrot TS, Pizzi C, Porta D, Relton CL, Richiardi L, Robinson O, Sunyer J, Vermeulen R, Vriens A, Vrijheid M, Henderson J, Vineis P. DNA Methylome Marks of Exposure to Particulate Matter at Three Time Points in Early Life. ENVIRONMENTAL SCIENCE & TECHNOLOGY 2018; 52:5427-5437. [PMID: 29597345 DOI: 10.1021/acs.est.7b06447] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Maternal exposure to airborne particulate matter (PM) has been associated with restricted fetal growth and reduced birthweight. Here, we performed methylome-wide analyses of cord and children's blood DNA in relation to residential exposure to PM smaller than 10 μm (PM10). This study included participants of the Avon Longitudinal Study of Pregnancy and Childhood (ALSPAC, cord blood, n = 780; blood at age 7, n = 757 and age 15-17, n = 850) and the EXPOsOMICS birth cohort consortium including cord blood from ENVIR ONAGE ( n = 197), INMA ( n = 84), Piccolipiù ( n = 99) and Rhea ( n = 75). We could not identify significant CpG sites, by meta-analyzing associations between maternal PM10 exposure during pregnancy and DNA methylation in cord blood, nor by studying DNA methylation and concordant annual exposure at 7 and 15-17 years. The CpG cg21785536 was inversely associated with PM10 exposure using a longitudinal model integrating the three studied age groups (-1.2% per 10 μg/m3; raw p-value = 3.82 × 10-8). Pathway analyses on the corresponding genes of the 100 strongest associated CpG sites of the longitudinal model revealed enriched pathways relating to the GABAergic synapse, p53 signaling and NOTCH1. We provided evidence that residential PM10 exposure in early life affects methylation of the CpG cg21785536 located on the EGF Domain Specific O-Linked N-Acetylglucosamine Transferase gene.
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Affiliation(s)
- Michelle Plusquin
- Centre for Environmental Sciences , Hasselt University , Hasselt , Belgium
- Department of Epidemiology and Biostatistics, The School of Public Health , Imperial College London , London , United Kingdom
- Medical Research Council-Health Protection Agency Centre for Environment and Health , Imperial College London , London , United Kingdom
| | - Marc Chadeau-Hyam
- Department of Epidemiology and Biostatistics, The School of Public Health , Imperial College London , London , United Kingdom
- Medical Research Council-Health Protection Agency Centre for Environment and Health , Imperial College London , London , United Kingdom
- Institute for Risk Assessment Sciences (IRAS), Division of Environmental Epidemiology , Utrecht University , Utrecht , The Netherlands
| | - Akram Ghantous
- International Agency for Research on Cancer (IARC) , 150 Cours Albert-Thomas , 69008 Lyon , France
| | - Rossella Alfano
- Centre for Environmental Sciences , Hasselt University , Hasselt , Belgium
- Department of Epidemiology and Biostatistics, The School of Public Health , Imperial College London , London , United Kingdom
- Medical Research Council-Health Protection Agency Centre for Environment and Health , Imperial College London , London , United Kingdom
| | - Mariona Bustamante
- Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology , Barcelona , Spain
- Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP) , Madrid , Spain
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL) , Barcelona , Spain
- Universitat Pompeu Fabra (UPF) , Barcelona, Catalonia , Spain
| | - Leda Chatzi
- Department of Preventive Medicine , University of Southern California , Los Angeles , California 90007 , United States
- Department of Social Medicine , University of Crete , Heraklion, Crete , Greece
| | - Cyrille Cuenin
- International Agency for Research on Cancer (IARC) , 150 Cours Albert-Thomas , 69008 Lyon , France
| | - John Gulliver
- Medical Research Council-Health Protection Agency Centre for Environment and Health , Imperial College London , London , United Kingdom
| | - Zdenko Herceg
- International Agency for Research on Cancer (IARC) , 150 Cours Albert-Thomas , 69008 Lyon , France
| | - Manolis Kogevinas
- Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP) , Madrid , Spain
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL) , Barcelona , Spain
- Universitat Pompeu Fabra (UPF) , Barcelona, Catalonia , Spain
- IMIM (Hospital del Mar Medical Research Institute) , Barcelona , Spain
| | - Tim S Nawrot
- Centre for Environmental Sciences , Hasselt University , Hasselt , Belgium
- Environment & Health Unit Leuven University , Leuven , Belgium
| | - Costanza Pizzi
- Cancer Epidemiology Unit-CERMS, Department of Medical Sciences , University of Turin and CPO-Piemonte , Torino , Italy
| | - Daniela Porta
- Department of Epidemiology of the Lazio Regional Health Service , Rome , Italy
| | - Caroline L Relton
- MRC Integrative Epidemiology Unit, Department of Population Health Sciences, Bristol Medical School , University of Bristol , Bristol , U.K
| | - Lorenzo Richiardi
- Cancer Epidemiology Unit-CERMS, Department of Medical Sciences , University of Turin and CPO-Piemonte , Torino , Italy
| | - Oliver Robinson
- Department of Epidemiology and Biostatistics, The School of Public Health , Imperial College London , London , United Kingdom
- Medical Research Council-Health Protection Agency Centre for Environment and Health , Imperial College London , London , United Kingdom
| | - Jordi Sunyer
- Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP) , Madrid , Spain
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL) , Barcelona , Spain
- IMIM (Hospital del Mar Medical Research Institute) , Barcelona , Spain
| | - Roel Vermeulen
- Medical Research Council-Health Protection Agency Centre for Environment and Health , Imperial College London , London , United Kingdom
- Institute for Risk Assessment Sciences (IRAS), Division of Environmental Epidemiology , Utrecht University , Utrecht , The Netherlands
| | - Annette Vriens
- Centre for Environmental Sciences , Hasselt University , Hasselt , Belgium
| | - Martine Vrijheid
- Consortium for Biomedical Research in Epidemiology and Public Health (CIBERESP) , Madrid , Spain
- ISGlobal, Centre for Research in Environmental Epidemiology (CREAL) , Barcelona , Spain
- Universitat Pompeu Fabra (UPF) , Barcelona, Catalonia , Spain
| | - John Henderson
- Department of Population Health Sciences, Bristol Medical School , University of Bristol , Bristol , U.K
| | - Paolo Vineis
- Centre for Environmental Sciences , Hasselt University , Hasselt , Belgium
- Department of Epidemiology and Biostatistics, The School of Public Health , Imperial College London , London , United Kingdom
- IIGM, Italian Institute for Genomic Medicine , Turin , Italy
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Martin EM, Fry RC. Environmental Influences on the Epigenome: Exposure- Associated DNA Methylation in Human Populations. Annu Rev Public Health 2018; 39:309-333. [PMID: 29328878 DOI: 10.1146/annurev-publhealth-040617-014629] [Citation(s) in RCA: 371] [Impact Index Per Article: 61.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
DNA methylation is the most well studied of the epigenetic regulators in relation to environmental exposures. To date, numerous studies have detailed the manner by which DNA methylation is influenced by the environment, resulting in altered global and gene-specific DNA methylation. These studies have focused on prenatal, early-life, and adult exposure scenarios. The present review summarizes currently available literature that demonstrates a relationship between DNA methylation and environmental exposures. It includes studies on aflatoxin B1, air pollution, arsenic, bisphenol A, cadmium, chromium, lead, mercury, polycyclic aromatic hydrocarbons, persistent organic pollutants, tobacco smoke, and nutritional factors. It also addresses gaps in the literature and future directions for research. These gaps include studies of mixtures, sexual dimorphisms with respect to environmentally associated methylation changes, tissue specificity, and temporal stability of the methylation marks.
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Affiliation(s)
- Elizabeth M Martin
- Department of Environmental Sciences and Engineering, and Curriculum in Toxicology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina 27599, USA; ,
| | - Rebecca C Fry
- Department of Environmental Sciences and Engineering, and Curriculum in Toxicology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, North Carolina 27599, USA; ,
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Palma-Gudiel H, Cirera F, Crispi F, Eixarch E, Fañanás L. The impact of prenatal insults on the human placental epigenome: A systematic review. Neurotoxicol Teratol 2018; 66:80-93. [PMID: 29307795 DOI: 10.1016/j.ntt.2018.01.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 12/20/2017] [Accepted: 01/01/2018] [Indexed: 02/07/2023]
Abstract
The placenta is the first human organ to reach full development during pregnancy. It serves as a barrier but also as an interchange surface. Epigenetic changes observed in placental tissue may reflect intrauterine insults while also pointing to physiological pathways altered under exposure to such environmental threats. By means of a systematic search of the literature, 39 papers assessing human placental epigenetic signatures in association with either (i) psychosocial stress, (ii) maternal psychopathology, (iii) maternal smoking during pregnancy, and (iv) exposure to environmental pollutants, were identified. Their findings revealed placental tissue as a unique source of epigenetic variability that does not correlate with epigenetic patterns observed in maternal or newborn blood, tissues which are typically analyzed regarding prenatal stress. Studies regarding prenatal stress and psychopathology during pregnancy were scarce and exploratory in nature revealing inconsistent findings. Of note, there was a marked tendency towards placental hypomethylation in studies assessing either tobacco use during pregnancy or exposure to environmental pollutants suggesting the interaction between contaminant-derived metabolites and epigenetic machinery. This review highlights the need for further prospective longitudinal studies assessing long-term health effects of placental epigenetic signatures derived from exposure to several prenatal stressors.
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Affiliation(s)
- Helena Palma-Gudiel
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of Barcelona, Spain; Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Spain
| | - Flors Cirera
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of Barcelona, Spain; Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Spain
| | - Fátima Crispi
- Fetal i+D Fetal Medicine Research Center, BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), Barcelona, Spain; Centre for Biomedical Research on Rare Diseases (CIBER-ER), Madrid, Spain
| | - Elisenda Eixarch
- Fetal i+D Fetal Medicine Research Center, BCNatal - Barcelona Center for Maternal-Fetal and Neonatal Medicine (Hospital Clínic and Hospital Sant Joan de Deu), Barcelona, Spain; Centre for Biomedical Research on Rare Diseases (CIBER-ER), Madrid, Spain
| | - Lourdes Fañanás
- Department of Evolutionary Biology, Ecology and Environmental Sciences, Faculty of Biology, University of Barcelona, Spain; Centro de Investigación Biomédica en Red de Salud Mental (CIBERSAM), Spain.
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Cai J, Zhao Y, Liu P, Xia B, Zhu Q, Wang X, Song Q, Kan H, Zhang Y. Exposure to particulate air pollution during early pregnancy is associated with placental DNA methylation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 607-608:1103-1108. [PMID: 28724248 DOI: 10.1016/j.scitotenv.2017.07.029] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2017] [Revised: 07/02/2017] [Accepted: 07/03/2017] [Indexed: 05/06/2023]
Abstract
Maternal exposure to particulate matter with aerodynamic diameter <10μm (PM10) during pregnancy results in adverse birth outcomes. Changes in placental DNA methylation might mediate those adverse effects. In this study, we examined the associations between prenatal PM10 exposure and DNA methylation of LINE1, HSD11B2 and NR3C1 in human placenta. One hundred and eighty-one mother newborn pairs (80 fetal growth restriction newborns, 101 normal newborns) participated in this study. The average PM10 exposure of each trimester and of the whole pregnancy was calculated using daily air pollution concentration data. Placental DNA methylation was measured by quantitative polymerase chain reaction-pyrosequencing. Placental LINE-1 DNA methylation was reversely associated with first trimester PM10 exposure 1.78% (-β=1.78, 95% CI: -3.35, -0.22%), while placental HSD11B2 DNA methylation was associated with both first and second trimester PM10 exposure, and relatively increased by 1.03% (95% CI: 0.07, 1.98%) and 2.33% (95% CI: 0.69, 3.76%) for each 10μg/m3 increase in exposure to PM10. Those associations were much more evident in fetal growth restriction newborns than those in normal newborns. In summary, early pregnancy PM10 exposure was associated with placental DNA methylation of LINE1 and HSD11B2, suggesting that such methylation alterations might mediate PM-induced reproductive and developmental toxicity.
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Affiliation(s)
- Jing Cai
- Key Laboratory of Public Health Safety, Ministry of Education, School of Public Health, Fudan University, Shanghai, China
| | - Yan Zhao
- Key Laboratory of Public Health Safety, Ministry of Education, School of Public Health, Fudan University, Shanghai, China
| | | | - Bin Xia
- Key Laboratory of Public Health Safety, Ministry of Education, School of Public Health, Fudan University, Shanghai, China
| | - Qingyang Zhu
- Key Laboratory of Public Health Safety, Ministry of Education, School of Public Health, Fudan University, Shanghai, China
| | - Xiu Wang
- Key Laboratory of Public Health Safety, Ministry of Education, School of Public Health, Fudan University, Shanghai, China
| | - Qi Song
- Key Laboratory of Public Health Safety, Ministry of Education, School of Public Health, Fudan University, Shanghai, China
| | - Haidong Kan
- Key Laboratory of Public Health Safety, Ministry of Education, School of Public Health, Fudan University, Shanghai, China.
| | - Yunhui Zhang
- Key Laboratory of Public Health Safety, Ministry of Education, School of Public Health, Fudan University, Shanghai, China.
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Madhloum N, Janssen BG, Martens DS, Saenen ND, Bijnens E, Gyselaers W, Penders J, Vanpoucke C, Lefebvre W, Plusquin M, Nawrot TS. Cord plasma insulin and in utero exposure to ambient air pollution. ENVIRONMENT INTERNATIONAL 2017; 105:126-132. [PMID: 28545656 DOI: 10.1016/j.envint.2017.05.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Revised: 04/25/2017] [Accepted: 05/12/2017] [Indexed: 05/25/2023]
Abstract
INTRODUCTION Cardio-metabolic risk factors including insulin levels are at young age barely perceived as harmful, but over time these risk factors may track and lead to higher risk of metabolic syndrome. Studies showed that exposure to air pollution is associated with an increased risk of insulin resistance in childhood. We determined whether the origin of type 2 diabetes can be found in the early childhood by examining the levels of insulin in the neonatal cord blood and whether this can be considered as a disease marker for later life. METHODS In the ENVIRONAGE (ENVIRonmental influence ON early AGEing) birth cohort, we recruited 620 mother-infant pairs between February 2nd 2010 until August 12th 2014 at the East-Limburg Hospital in Genk, Belgium. We investigated in 590 newborns the association between cord plasma insulin levels and exposure to particulate matter (PM2.5 and PM10) and nitrogen dioxide (NO2) in various exposure windows during pregnancy. Trimester-specific air pollutant exposure levels were estimated for each mother's home address using a spatiotemporal model. RESULTS Cord plasma insulin levels averaged 33.1pmol/L (25-75th percentile: 20.1-53.5), while PM2.5 exposure during pregnancy averaged (SD) 13.7μg/m3 (2.4). Independent of maternal age, newborn's sex, birth weight, gestational age, parity, early-pregnancy BMI, ethnicity, smoking status, time of the day, maternal education, time of delivery, and season of delivery, cord plasma insulin levels increased with 15.8% (95% CI 7.8 to 24.4, p<0.0001) for each SD increment in PM2.5 levels during the entire pregnancy and was most pronounced in the 2nd trimester (13.1%, 95% CI 3.4 to 23.7, p=0.007) of pregnancy. The results for PM10 exposure were similar with those of PM2.5 exposure but we did not observe an association between cord blood insulin levels and NO2 exposure. CONCLUSIONS Exposure to particulate air pollution during pregnancy is associated with increased levels of cord plasma insulin at birth. The public health relevance of this association is demonstrated by the fact that a 2.4μg/m3 (SD) increase in PM2.5 during pregnancy on cord plasma insulin levels corresponds to the effect-size of a 9kg/m2 higher early-pregnancy BMI on cord plasma. Particulate air pollution induced changes in cord plasma insulin levels during early life and might be a risk factor in the development of metabolic disease, such as glucose intolerance or type 2 diabetes, later in life.
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Affiliation(s)
- Narjes Madhloum
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - Bram G Janssen
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - Dries S Martens
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - Nelly D Saenen
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - Esmée Bijnens
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - Wilfried Gyselaers
- Department of Obstetrics, East-Limburg Hospital, Genk, Belgium; Biomedical Research Institute, Hasselt University, Diepenbeek, Belgium
| | - Joris Penders
- Biomedical Research Institute, Hasselt University, Diepenbeek, Belgium; Laboratory of Clinical Biology, East-Limburg Hospital, Genk, Belgium
| | | | - Wouter Lefebvre
- Flemish Institute for Technological Research (VITO), Mol, Belgium
| | - Michelle Plusquin
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium
| | - Tim S Nawrot
- Centre for Environmental Sciences, Hasselt University, Diepenbeek, Belgium; Department of Public Health & Primary Care, Occupational & Environmental Medicine, Leuven University, Leuven, Belgium.
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66
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Blum JL, Chen LC, Zelikoff JT. Exposure to Ambient Particulate Matter during Specific Gestational Periods Produces Adverse Obstetric Consequences in Mice. ENVIRONMENTAL HEALTH PERSPECTIVES 2017; 125:077020. [PMID: 28893721 PMCID: PMC5744697 DOI: 10.1289/ehp1029] [Citation(s) in RCA: 57] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/26/2016] [Revised: 12/12/2016] [Accepted: 01/23/2017] [Indexed: 05/28/2023]
Abstract
BACKGROUND Epidemiological studies associate inhalation of fine-sized particulate matter (PM2.5) during pregnancy with preterm birth (PTB) and low birth weight (LBW) but disagree over which time frames are most sensitive, or if effects are cumulative. OBJECTIVES Our objective was to provide experimental plausibility for epidemiological observations by testing the hypothesis that exposure to PM2.5 during discrete periods of pregnancy results in PTB and LBW. METHODS For the first study, timed-pregnant B6C3F1 mice were exposed to concentrated ambient PM2.5 (CAPs) or filtered air (FA) throughout pregnancy [6 h/d from gestational day (GD) 0.5 through GD16.5]. A follow-up study examined the effects of CAPs exposure during discrete gestational periods (1: GD0.5–5.5; 2: GD6.5–14.5; 3: GD14.5–16.5; 4: GD0.5–16.5) aligning to milestones during human development. RESULTS In the first experiment, exposure to 160 μg CAPs/m3 throughout pregnancy decreased gestational term by 0.5 d (∼1.1 wk decrease for humans) and birth weight by 11.4% compared with FA. The follow-up experiment investigated timing of CAPs exposure (mean concentrations at 178, 193, 171, and 173 μg/m3 for periods 1–4, respectively). Pregnancy was significantly shortened (vs. FA) by ∼0.4d when exposure occurred during gestational periods 2 and 4, and by ∼0.5d if exposure occurred during period 3. Exposure during periods 1, 2, and 4 reduced birth weight by ∼10% compared with FA, and placental weight was reduced (∼8%) on GD17.5 if exposure occurred only during period 3. CONCLUSIONS Adverse PM2.5-induced outcomes such as PTB and LBW are dependent upon the periods of maternal exposure. The results of these experimental studies could contribute significantly to air pollution policy decisions in the future. https://doi.org/10.1289/EHP1029.
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Affiliation(s)
- Jason L Blum
- Department of Environmental Medicine, New York University School of Medicine , Tuxedo, New York, USA
| | - Lung-Chi Chen
- Department of Environmental Medicine, New York University School of Medicine , Tuxedo, New York, USA
| | - Judith T Zelikoff
- Department of Environmental Medicine, New York University School of Medicine , Tuxedo, New York, USA
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Maghbooli Z, Hossein-Nezhad A, Ramezani M, Moattari S. Epigenetic Alterations and Exposure to Air Pollutants: Protocol for a Birth Cohort Study to Evaluate the Association Between Adverse Birth Outcomes and Global DNA Methylation. JMIR Res Protoc 2017; 6:e29. [PMID: 28232302 PMCID: PMC5344983 DOI: 10.2196/resprot.7114] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Revised: 01/22/2017] [Accepted: 01/23/2017] [Indexed: 12/17/2022] Open
Abstract
Background Prenatal exposure to air pollutants can increase the risk of adverse birth outcomes and susceptibility to a number of complex disorders later in life. Despite this general understanding, the molecular and cellular responses to air pollution exposure during early life are not completely clear. Objective The aims of this study are to test the association between air pollution and adverse pregnancy outcomes, and to determine whether the levels of maternal and cord blood and of placental DNA methylation during pregnancy predict adverse birth outcomes in polluted areas. Methods This is a birth cohort study. We will enroll pregnant healthy women attending prenatal care clinics in Tehran, Iran, who are resident in selected polluted and unpolluted regions before the 14th week of pregnancy. We will calculate the regional background levels of fine particulate matter (particles with a diameter between 2.5 and 10 μm) and nitrogen dioxide for all regions of by using data from the Tehran Air Quality Control Company. Then, we will select 2 regions as the polluted and unpolluted areas of interest. Healthy mothers living in the selected polluted and non polluted regions will be enrolled in this study. A maternal health history questionnaire will be completed at each trimester. During the first and second trimester, we will draw mothers’ blood for biochemical and DNA methylation analyses. At the time of delivery time, we will collect maternal and cord blood for biochemical, gene expression, and DNA methylation analyses. We will also record birth outcomes (the newborn’s sex, birth date, birth weight and length, gestational age, Apgar score, and level of neonatal care required). Results The project was funded in March 2016 and enrollment will be completed in August 2017. Data analysis is under way, and the first results are expected to be submitted for publication in November 2017. Conclusions We supposed that prenatal exposures to air pollutants can influence fetal reprogramming by epigenetic modifications such as DNA methylation. This could explain the association between air pollution and adverse pregnancy outcomes.
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Affiliation(s)
- Zhila Maghbooli
- Osteoporosis Research Center, Endocrinology and Metabolism Research Institute of Tehran University of Medical Sciences, Tehran, Islamic Republic Of Iran
| | - Arash Hossein-Nezhad
- Osteoporosis Research Center, Endocrinology and Metabolism Research Institute of Tehran University of Medical Sciences, Tehran, Islamic Republic Of Iran.,Department of Medicine, Section of Endocrinology, Nutrition, and Diabetes, Vitamin D, Skin and Bone Research Laboratory, Boston University Medical Center, Boston, MA, United States
| | - Majid Ramezani
- Department of Endocrinology, Baghiatallah University of Medical Sciences, Tehran, Islamic Republic Of Iran
| | - Syamak Moattari
- Osteoporosis Research Center, Endocrinology and Metabolism Research Institute of Tehran University of Medical Sciences, Tehran, Islamic Republic Of Iran.,Health Science Department, Worcester State University, Worcester, MA, United States
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