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Vilcins D, Lee WR, Pham C, Tanner S, Knibbs LD, Burgner D, Blake TL, Mansell T, Ponsonby AL, Sly PD. Association of maternal air pollution exposure and infant lung function is modified by genetic propensity to oxidative stress. MEDRXIV : THE PREPRINT SERVER FOR HEALTH SCIENCES 2023:2023.10.13.23296994. [PMID: 37873073 PMCID: PMC10592989 DOI: 10.1101/2023.10.13.23296994] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/25/2023]
Abstract
Introduction The association between air pollution and poor respiratory health outcomes is well established, however less is known about the biological mechanisms, especially in early life. Children are particularly at risk from air pollution, especially during the prenatal period as their organs and systems are still undergoing crucial development. Therefore, our study aims to investigate if maternal exposure to air pollution during pregnancy is associated with oxidative stress (OS) and inflammation in pregnancy or infant lung function at 4 weeks of age, and the extent to which the association is modified by an infant's genetic risk of OS. Methods The Barwon Infant Study (BIS) is a longitudinal study of Australian children from the region of Geelong, Victoria. A total of 314 infants had available lung function and maternal OS markers. Exposure to annual air pollutants (NO 2 and PM 2.5 ) were estimated using validated, satellite-based, land-use regression models. Infant lung function was measured by multiple-breath washout, and the ratio of peak tidal expiratory flow over expiratory time was calculated at 4 weeks of age. An inflammation biomarker, glycoprotein acetyls (GlycA), was measured in maternal (36 weeks) and cord blood, and oxidative stress (OS) biomarkers, 8-hydroxyguanine (8-OHGua) and 8-hydroxy-2'-deoxyguanosine (8-OHdG) were measured in maternal urine at 28 weeks. A genetic pathway score for OS (gPFS ox ) was calculated for each infant participant in the BIS cohort, and high risk defined as score >8. Linear regression was used to explore the association of maternal air pollution exposure with infant lung function, and potential modification by OS genotype was tested through use of interaction terms and other methods. Results There was no evidence of a relationship between maternal exposure to air pollution and infant lung function in the whole population. We did not find an association between air pollution and GlycA or OS during pregnancy. We found evidence of an association between NO 2 and lower in functional residual capacity (FRC) for children with a high genetic risk of OS (β=-5.3 mls, 95% CI (-9.3, -1.3), p=0.01). We also found that when NO 2 was considered in tertiles, the highest tertile of NO 2 was associated with increase in lung clearance index (LCI) (β=0.46 turnovers, (95% CI 0.10, 0.82), p=0.01) in children with a genetic propensity to OS. Conclusion Our study found that high prenatal levels of exposure to ambient NO 2 levels is associated with lower FRC and higher LCI in infants with a genetic propensity to oxidative stress. There was no relationship between maternal exposure to air pollution with maternal and cord blood inflammation or OS biomarkers.
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Pham C, Thomson S, Chin ST, Vuillermin P, O'Hely M, Burgner D, Tanner S, Saffery R, Mansell T, Bong S, Holmes E, Sly PD, Gray N, Ponsonby AL. Maternal oxidative stress during pregnancy associated with emotional and behavioural problems in early childhood: implications for foetal programming. Mol Psychiatry 2023; 28:3760-3768. [PMID: 37845496 PMCID: PMC10730421 DOI: 10.1038/s41380-023-02284-9] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/18/2022] [Revised: 09/10/2023] [Accepted: 09/21/2023] [Indexed: 10/18/2023]
Abstract
Childhood mental disorders, including emotional and behavioural problems (EBP) are increasingly prevalent. Higher maternal oxidative stress (OS) during pregnancy (matOSpreg) is linked to offspring mental disorders. Environmental factors contribute to matOSpreg. However, the role of matOSpreg in childhood EBP is unclear. We investigated the associations between (i) matOSpreg and offspring EBP; (ii) social and prenatal environmental factors and matOSpreg; and (iii) social and prenatal factors and childhood EBP and evaluated whether matOSpreg mediated these associations. Maternal urinary OS biomarkers, 8-hydroxyguanosine (8-OHGua; an oxidative RNA damage marker) and 8-hydroxy-2'-deoxyguanosine (8-OHdG; an oxidative DNA damage marker), at 36 weeks of pregnancy were quantified by liquid chromatography-mass spectrometry in a population-derived birth cohort, Barwon Infant Study (n = 1074 mother-infant pairs). Social and prenatal environmental factors were collected by mother-reported questionnaires. Offspring total EBP was measured by Child Behavior Checklist Total Problems T-scores at age two (n = 675) and Strengths and Difficulties Questionnaire Total Difficulties score at age four (n = 791). Prospective associations were examined by multivariable regression analyses adjusted for covariates. Mediation effects were evaluated using counterfactual-based mediation analysis. Higher maternal urinary 8-OHGua at 36 weeks (mat8-OHGua36w) was associated with greater offspring total EBP at age four (β = 0.38, 95% CI (0.07, 0.69), P = 0.02) and age two (β = 0.62, 95% CI (-0.06, 1.30), P = 0.07). Weaker evidence of association was detected for 8-OHdG. Five early-life factors were associated with both mat8-OHGua36w and childhood EBP (P-range < 0.001-0.05), including lower maternal education, socioeconomic disadvantage and prenatal tobacco smoking. These risk factor-childhood EBP associations were partly mediated by higher mat8-OHGua36w (P-range = 0.01-0.05). Higher matOSpreg, particularly oxidant RNA damage, is associated with later offspring EBP. Effects of some social and prenatal lifestyle factors on childhood EBP were partly mediated by matOSpreg. Future studies are warranted to further elucidate the role of early-life oxidant damage in childhood EBP.
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Affiliation(s)
- Cindy Pham
- Murdoch Children's Research Institute, Royal Children's Hospital, University of Melbourne, Parkville, VIC, 3052, Australia
- Florey Institute, University of Melbourne, Parkville, VIC, 3052, Australia
- Melbourne School of Population and Global Health, University of Melbourne, Parkville, VIC, 3052, Australia
| | - Sarah Thomson
- Florey Institute, University of Melbourne, Parkville, VIC, 3052, Australia
| | - Sung-Tong Chin
- Australian National Phenome Centre, Health Futures Institute, Harry Perkins Institute, Murdoch University, Perth, WA, 6150, Australia
| | - Peter Vuillermin
- School of Medicine, Deakin University, Geelong, VIC, 3220, Australia
- Barwon Health, Geelong, VIC, 3220, Australia
| | - Martin O'Hely
- Murdoch Children's Research Institute, Royal Children's Hospital, University of Melbourne, Parkville, VIC, 3052, Australia
- School of Medicine, Deakin University, Geelong, VIC, 3220, Australia
| | - David Burgner
- Murdoch Children's Research Institute, Royal Children's Hospital, University of Melbourne, Parkville, VIC, 3052, Australia
- Department of Paediatrics, University of Melbourne, Parkville, VIC, 3052, Australia
| | - Samuel Tanner
- Florey Institute, University of Melbourne, Parkville, VIC, 3052, Australia
| | - Richard Saffery
- Murdoch Children's Research Institute, Royal Children's Hospital, University of Melbourne, Parkville, VIC, 3052, Australia
- Department of Paediatrics, University of Melbourne, Parkville, VIC, 3052, Australia
| | - Toby Mansell
- Murdoch Children's Research Institute, Royal Children's Hospital, University of Melbourne, Parkville, VIC, 3052, Australia
- Department of Paediatrics, University of Melbourne, Parkville, VIC, 3052, Australia
| | - Sze Bong
- Australian National Phenome Centre, Health Futures Institute, Harry Perkins Institute, Murdoch University, Perth, WA, 6150, Australia
| | - Elaine Holmes
- Australian National Phenome Centre, Health Futures Institute, Harry Perkins Institute, Murdoch University, Perth, WA, 6150, Australia
| | - Peter D Sly
- School of Medicine, Deakin University, Geelong, VIC, 3220, Australia
- Child Health Research Centre, University of Queensland, South Brisbane, QLD, 4101, Australia
| | - Nicola Gray
- Australian National Phenome Centre, Health Futures Institute, Harry Perkins Institute, Murdoch University, Perth, WA, 6150, Australia
| | - Anne-Louise Ponsonby
- Murdoch Children's Research Institute, Royal Children's Hospital, University of Melbourne, Parkville, VIC, 3052, Australia.
- Florey Institute, University of Melbourne, Parkville, VIC, 3052, Australia.
- Melbourne School of Population and Global Health, University of Melbourne, Parkville, VIC, 3052, Australia.
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Silveira PP, Meaney MJ. Examining the biological mechanisms of human mental disorders resulting from gene-environment interdependence using novel functional genomic approaches. Neurobiol Dis 2023; 178:106008. [PMID: 36690304 DOI: 10.1016/j.nbd.2023.106008] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 12/30/2022] [Accepted: 01/18/2023] [Indexed: 01/21/2023] Open
Abstract
We explore how functional genomics approaches that integrate datasets from human and non-human model systems can improve our understanding of the effect of gene-environment interplay on the risk for mental disorders. We start by briefly defining the G-E paradigm and its challenges and then discuss the different levels of regulation of gene expression and the corresponding data existing in humans (genome wide genotyping, transcriptomics, DNA methylation, chromatin modifications, chromosome conformational changes, non-coding RNAs, proteomics and metabolomics), discussing novel approaches to the application of these data in the study of the origins of mental health. Finally, we discuss the multilevel integration of diverse types of data. Advance in the use of functional genomics in the context of a G-E perspective improves the detection of vulnerabilities, informing the development of preventive and therapeutic interventions.
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Affiliation(s)
- Patrícia Pelufo Silveira
- Department of Psychiatry, Faculty of Medicine and Health Sciences, McGill University, Montreal, QC, Canada; Ludmer Centre for Neuroinformatics and Mental Health, Douglas Mental Health University Institute, McGill University, Montreal, QC, Canada.
| | - Michael J Meaney
- Department of Psychiatry, Faculty of Medicine and Health Sciences, McGill University, Montreal, QC, Canada; Translational Neuroscience Program, Singapore Institute for Clinical Sciences, Agency for Science, Technology and Research (ASTAR), Singapore; Brain - Body Initiative, Agency for Science, Technology and Research (ASTAR), Singapore.
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Thomson S, Drummond K, O'Hely M, Symeonides C, Chandran C, Mansell T, Saffery R, Sly P, Mueller J, Vuillermin P, Ponsonby AL. Increased maternal non-oxidative energy metabolism mediates association between prenatal di-(2-ethylhexyl) phthalate (DEHP) exposure and offspring autism spectrum disorder symptoms in early life: A birth cohort study. ENVIRONMENT INTERNATIONAL 2023; 171:107678. [PMID: 36516674 DOI: 10.1016/j.envint.2022.107678] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 11/08/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
Prenatal phthalate exposure has previously been linked to the development of autism spectrum disorder (ASD). However, the underlying biological mechanisms remain unclear. We investigated whether maternal and child central carbon metabolism is involved as part of the Barwon Infant Study (BIS), a population-based birth cohort of 1,074 Australian children. We estimated phthalate daily intakes using third-trimester urinary phthalate metabolite concentrations and other relevant indices. The metabolome of maternal serum in the third trimester, cord serum at birth and child plasma at 1 year were measured by nuclear magnetic resonance. We used the Small Molecule Pathway Database and principal component analysis to construct composite metabolite scores reflecting metabolic pathways. ASD symptoms at 2 and 4 years were measured in 596 and 674 children by subscales of the Child Behavior Checklist and the Strengths and Difficulties Questionnaire, respectively. Multivariable linear regression analyses demonstrated (i) prospective associations between higher prenatal di-(2-ethylhexyl) phthalate (DEHP) levels and upregulation of maternal non-oxidative energy metabolism pathways, and (ii) prospective associations between upregulation of these pathways and increased offspring ASD symptoms at 2 and 4 years of age. Counterfactual mediation analyses indicated that part of the mechanism by which higher prenatal DEHP exposure influences the development of ASD symptoms in early childhood is through a maternal metabolic shift in pregnancy towards non-oxidative energy pathways, which are inefficient compared to oxidative metabolism. These results highlight the importance of the prenatal period and suggest that further investigation of maternal energy metabolism as a molecular mediator of the adverse impact of prenatal environmental exposures such as phthalates is warranted.
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Affiliation(s)
- Sarah Thomson
- Florey Institute of Neuroscience and Mental Health, 30 Royal Parade, Parkville, VIC 3052, Australia
| | - Katherine Drummond
- Florey Institute of Neuroscience and Mental Health, 30 Royal Parade, Parkville, VIC 3052, Australia
| | - Martin O'Hely
- Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, 299 Ryrie Street, Geelong, VIC 3220, Australia; Murdoch Children's Research Institute, Royal Children's Hospital, The University of Melbourne, 50 Flemington Rd, Parkville, VIC 3052, Australia
| | - Christos Symeonides
- Murdoch Children's Research Institute, Royal Children's Hospital, The University of Melbourne, 50 Flemington Rd, Parkville, VIC 3052, Australia
| | - Chitra Chandran
- Florey Institute of Neuroscience and Mental Health, 30 Royal Parade, Parkville, VIC 3052, Australia
| | - Toby Mansell
- Murdoch Children's Research Institute, Royal Children's Hospital, The University of Melbourne, 50 Flemington Rd, Parkville, VIC 3052, Australia
| | - Richard Saffery
- Murdoch Children's Research Institute, Royal Children's Hospital, The University of Melbourne, 50 Flemington Rd, Parkville, VIC 3052, Australia
| | - Peter Sly
- Murdoch Children's Research Institute, Royal Children's Hospital, The University of Melbourne, 50 Flemington Rd, Parkville, VIC 3052, Australia; Child Health Research Centre, The University of Queensland, 62 Graham St, South Brisbane, QLD 4101, Australia
| | - Jochen Mueller
- Queensland Alliance for Environmental Health Sciences (QAEHS), The University of Queensland, Brisbane, QLD 4072, Australia
| | - Peter Vuillermin
- Deakin University, IMPACT - the Institute for Mental and Physical Health and Clinical Translation, School of Medicine, Barwon Health, 299 Ryrie Street, Geelong, VIC 3220, Australia; Murdoch Children's Research Institute, Royal Children's Hospital, The University of Melbourne, 50 Flemington Rd, Parkville, VIC 3052, Australia
| | - Anne-Louise Ponsonby
- Florey Institute of Neuroscience and Mental Health, 30 Royal Parade, Parkville, VIC 3052, Australia; Murdoch Children's Research Institute, Royal Children's Hospital, The University of Melbourne, 50 Flemington Rd, Parkville, VIC 3052, Australia.
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Parenti M, Schmidt RJ, Ozonoff S, Shin HM, Tancredi DJ, Krakowiak P, Hertz-Picciotto I, Walker CK, Slupsky CM. Maternal Serum and Placental Metabolomes in Association with Prenatal Phthalate Exposure and Neurodevelopmental Outcomes in the MARBLES Cohort. Metabolites 2022; 12:829. [PMID: 36144233 PMCID: PMC9500898 DOI: 10.3390/metabo12090829] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2022] [Revised: 08/26/2022] [Accepted: 08/27/2022] [Indexed: 01/16/2023] Open
Abstract
Prenatal exposure to phthalates, a family of endocrine-disrupting plasticizers, is associated with disruption of maternal metabolism and impaired neurodevelopment. We investigated associations between prenatal phthalate exposure and alterations of both the maternal third trimester serum metabolome and the placental metabolome at birth, and associations of these with child neurodevelopmental outcomes using data and samples from the Markers of Autism Risk in Babies Learning Early Signs (MARBLES) cohort. The third trimester serum (n = 106) and placental (n = 132) metabolomes were investigated using 1H nuclear magnetic resonance spectroscopy. Children were assessed clinically for autism spectrum disorder (ASD) and cognitive development. Although none of the urinary phthalate metabolite concentrations were associated with maternal serum metabolites after adjustment for covariates, mixture analysis using quantile g-computation revealed alterations in placental metabolites with increasing concentrations of phthalate metabolites that included reduced concentrations of 2-hydoxybutyrate, carnitine, O-acetylcarnitine, glucitol, and N-acetylneuraminate. Child neurodevelopmental outcome was not associated with the third trimester serum metabolome, but it was correlated with the placental metabolome in male children only. Maternal phthalate exposure during pregnancy is associated with differences in the placental metabolome at delivery, and the placental metabolome is associated with neurodevelopmental outcomes in males in a cohort with high familial ASD risk.
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Affiliation(s)
- Mariana Parenti
- Department of Nutrition, University of California, Davis, CA 95616, USA
| | - Rebecca J. Schmidt
- Department of Public Health Sciences, University of California, Davis, CA 95616, USA
- Medical Investigation of Neurodevelopmental Disorders (MIND) Institute, University of California, Davis, CA 95616, USA
| | - Sally Ozonoff
- Medical Investigation of Neurodevelopmental Disorders (MIND) Institute, University of California, Davis, CA 95616, USA
- Department of Psychiatry and Behavioral Sciences, University of California, Davis, CA 95616, USA
| | - Hyeong-Moo Shin
- Department of Environmental Science, Baylor University, Waco, TX 76798, USA
| | - Daniel J. Tancredi
- Department of Pediatrics, School of Medicine, University of California, Davis, CA 95616, USA
| | - Paula Krakowiak
- Department of Public Health Sciences, University of California, Davis, CA 95616, USA
| | - Irva Hertz-Picciotto
- Department of Public Health Sciences, University of California, Davis, CA 95616, USA
- Medical Investigation of Neurodevelopmental Disorders (MIND) Institute, University of California, Davis, CA 95616, USA
| | - Cheryl K. Walker
- Medical Investigation of Neurodevelopmental Disorders (MIND) Institute, University of California, Davis, CA 95616, USA
- Department of Obstetrics & Gynecology, School of Medicine, University of California, Davis, CA 95616, USA
| | - Carolyn M. Slupsky
- Department of Nutrition, University of California, Davis, CA 95616, USA
- Department of Food Science and Technology, University of California, Davis, CA 95616, USA
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