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1. Development and validation of a porcine artificial colonic mucus model reflecting the properties of native colonic mucus in pigs

Author

Barmpatsalou, Vicky, Rodler, Agnes, Jacobson, Magdalena, Karlsson, Eva Marie-Louise, Pedersen, Betty Lomstein, Bergström, Christel Anna Sofie, Barmpatsalou, Vicky, Rodler, Agnes, Jacobson, Magdalena, Karlsson, Eva Marie-Louise, Pedersen, Betty Lomstein, and Bergström, Christel Anna Sofie

Abstract

Colonic mucus plays a key role in colonic drug absorption. Mucus permeation assays could therefore provide useful insights and support rational formulation development in the early stages of drug development. However, the collection of native colonic mucus from animal sources is labor-intensive, does not yield amounts that allow for routine experimentation, and raises ethical concerns. In the present study, we developed an in vitro porcine artificial colonic mucus model based on the characterization of native colonic mucus. The structural properties of the artificial colonic mucus were validated against the native secretion for their ability to capture key diffusion patterns of macromolecules in native mucus. Moreover, the artificial colonic mucus could be stored under common laboratory conditions, without compromising its barrier properties. In conclusion, the porcine artificial colonic mucus model can be considered a biorelevant way to study the diffusion behavior of drug candidates in colonic mucus. It is a cost-efficient screening tool easily incorporated into the early stages of drug development and it contributes to the implementation of the 3Rs (refinement, reduction, and replacement of animals) in the drug development process.

Published
2023
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3. DNA methylation and body mass index from birth to adolescence: meta-analyses of epigenome-wide association studies

Author

Vehmeijer, F.O.L. (Florianne O.L.), Küpers, A.M. (Marlijn), Sharp, G.C. (Gemma C.), Salas, L.A. (Lucas A.), Lent, S. (Samantha), Jima, D.D. (Dereje D.), Tindula, G. (Gwen), Reese, S.E. (Sarah E.), Qi, C. (Cancan), Gruzieva, O. (Olena), Page, C. (Christian), Rezwan, F.I. (Faisal I.), Melton, P.E. (Philip E.), Nohr, C. (Christian), Escaramís, G. (Geòrgia), Rzehak, P. (Peter), Heiskala, A. (Anni), Gong, T. (Tong), Tuominen, S.T. (Samuli T.), Gao, L. (Lu), Ross, J.P. (Jason P.), Starling, A.P. (Anne P.), Holloway, J.W. (John W.), Yousefi, P. (Paul), Aasvang, G.M. (Gunn Marit), Beilin, L.J. (Lawrence), Bergström, A. (Anna), Binder, E.B. (Elisabeth), Chatzi, L. (Leda), Corpeleijn, E. (Eva), Czamara, D. (Darina), Eskenazi, B. (B.), Ewart, S. (Susan), Ferre, N. (Natalia), Grote, V. (Veit), Gruszfeld, D. (Dariusz), Håberg, S.E. (Siri E), Hoyo, C. (Cathrine), Huen, K. (Karen), Karlsson, R. (Robert), Kull, C.A. (Christian), Langhendries, J.P. (Jean Paul), Lepeule, J. (Johanna), Magnus, M.C. (Maria C.), Maguire, R.L. (Rachel L.), Molloy, P.L. (Peter L.), Poppelaars-Monnereau, C. (Claire), Mori, T.A. (Trevor A.), Oken, E. (Emily), Räikkönen, K. (Katri), Rifas-Shiman, S.L. (Sheryl), Ruiz-Arenas, C. (Carlos), Sebert, S. (Sylvain), Ullemar, V. (Vilhelmina), Verduci, E. (Elvira), Vonk, J.M. (Judith), Xu, C.-J. (Cheng-Jian), Yang, I.V. (Ivana V.), Zhang, H. (Hongmei), Zhang, W. (Weiming), Karmaus, W. (Wilfried), Dabelea, D. (Dana), Muhlhausler, B.S. (Beverly S.), Breton, C. (Carrie), Lahti, J. (Jari), Almqvist, C. (Catarina), Jarvelin, M.-R. (Marjo-Riitta), Koletzko, B. (Berthold), Vrijheid, M. (Martine), Sørensen, T.I.A. (Thorkild), Huang, R.-C. (Rae-Chi), Arshad, S.H. (Syed), Nystad, W. (Wenche), Melén, E. (Erik), Koppelman, G.H. (Gerard), London, S.J. (Stephanie J.), Holland, N. (Nina), Bustamante, M. (Mariona), Murphy, S.K. (Susan K.), Hivert, M.-F. (Marie-France), Baccarelli, A.A. (Andrea), Relton, C.L. (Caroline), Snieder, H. (Harold), Jaddoe, V.W.V. (Vincent), Felix, J.F. (Janine), Vehmeijer, F.O.L. (Florianne O.L.), Küpers, A.M. (Marlijn), Sharp, G.C. (Gemma C.), Salas, L.A. (Lucas A.), Lent, S. (Samantha), Jima, D.D. (Dereje D.), Tindula, G. (Gwen), Reese, S.E. (Sarah E.), Qi, C. (Cancan), Gruzieva, O. (Olena), Page, C. (Christian), Rezwan, F.I. (Faisal I.), Melton, P.E. (Philip E.), Nohr, C. (Christian), Escaramís, G. (Geòrgia), Rzehak, P. (Peter), Heiskala, A. (Anni), Gong, T. (Tong), Tuominen, S.T. (Samuli T.), Gao, L. (Lu), Ross, J.P. (Jason P.), Starling, A.P. (Anne P.), Holloway, J.W. (John W.), Yousefi, P. (Paul), Aasvang, G.M. (Gunn Marit), Beilin, L.J. (Lawrence), Bergström, A. (Anna), Binder, E.B. (Elisabeth), Chatzi, L. (Leda), Corpeleijn, E. (Eva), Czamara, D. (Darina), Eskenazi, B. (B.), Ewart, S. (Susan), Ferre, N. (Natalia), Grote, V. (Veit), Gruszfeld, D. (Dariusz), Håberg, S.E. (Siri E), Hoyo, C. (Cathrine), Huen, K. (Karen), Karlsson, R. (Robert), Kull, C.A. (Christian), Langhendries, J.P. (Jean Paul), Lepeule, J. (Johanna), Magnus, M.C. (Maria C.), Maguire, R.L. (Rachel L.), Molloy, P.L. (Peter L.), Poppelaars-Monnereau, C. (Claire), Mori, T.A. (Trevor A.), Oken, E. (Emily), Räikkönen, K. (Katri), Rifas-Shiman, S.L. (Sheryl), Ruiz-Arenas, C. (Carlos), Sebert, S. (Sylvain), Ullemar, V. (Vilhelmina), Verduci, E. (Elvira), Vonk, J.M. (Judith), Xu, C.-J. (Cheng-Jian), Yang, I.V. (Ivana V.), Zhang, H. (Hongmei), Zhang, W. (Weiming), Karmaus, W. (Wilfried), Dabelea, D. (Dana), Muhlhausler, B.S. (Beverly S.), Breton, C. (Carrie), Lahti, J. (Jari), Almqvist, C. (Catarina), Jarvelin, M.-R. (Marjo-Riitta), Koletzko, B. (Berthold), Vrijheid, M. (Martine), Sørensen, T.I.A. (Thorkild), Huang, R.-C. (Rae-Chi), Arshad, S.H. (Syed), Nystad, W. (Wenche), Melén, E. (Erik), Koppelman, G.H. (Gerard), London, S.J. (Stephanie J.), Holland, N. (Nina), Bustamante, M. (Mariona), Murphy, S.K. (Susan K.), Hivert, M.-F. (Marie-France), Baccarelli, A.A. (Andrea), Relton, C.L. (Caroline), Snieder, H. (Harold), Jaddoe, V.W.V. (Vincent), and Felix, J.F. (Janine)

Abstract

Background: DNA methylation has been shown to be associated with adiposity in adulthood. However, whether similar DNA methylation patterns are associated with childhood and adolescent body mass index (BMI) is largely unknown. More insight into this relationship at younger ages may have implications for future prevention of obesity and its related traits. Methods: We examined whether DNA methylation in cord blood and whole blood in childhood and adolescence was associated with BMI in the age range from 2 to 18 years using both cross-sectional and longitudinal models. We performed meta-analyses of epigenome-wide association studies including up to 4133 children from 23 studies. We examined the overlap of findings reported in previous studies in children and adults with those in our analyses and calculated enrichment. Results: DNA methylation at three CpGs (cg05937453, cg25212453, and cg10040131), each in a different age range, was associated with BMI at Bonferroni significance, P < 1.06 × 10−7, with a 0.96 standard deviation score (SDS) (standard error (SE) 0.17), 0.32 SDS (SE 0.06), and 0.32 BMI SDS (SE 0.06) higher BMI per 10% increase in methylation, respectively. DNA methylation at nine additional CpGs in the cross-sectional childhood model was associated with BMI at false discovery rate significance. The strength of the associations of DNA methylation at the 187 CpGs previously identified to be associated with adult BMI, increased with advancing age across childhood and adolescence in our analyses. In addition, correlation coefficients between effect estimates for those CpGs in adults and in children and adolescents also increased. Among the top findings for each age range, we observed increasing enrichment for the CpGs that were previously identified in adults (birth Penrichment = 1; childhood Penrichment = 2.00 × 10−4; adolescence Penrichment = 2.10 × 10−7). Conclusions: There were only minimal associations of DNA methylation with childhood and adolescent BMI.

Published
2020
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4. Changes in parental smoking during pregnancy and risks of adverse birth outcomes and childhood overweight in Europe and North America

Author

Philips, E.M. (Elise), Santos, S.M.S. (Susana), Trasande, L. (Leonardo), Aurrekoetxea, J.J. (Juan José), Barros, A.I. (Ana), Berg, A. (Andrea) von, Bergström, A. (Anna), Bird, P.K. (Philippa K.), Brescianini, S. (Sonia), Ní Chaoimh, C. (Carol), Charles, M.A., Chatzi, L. (Leda), Chevrier, C. (Cécile), Chrousos, G.P., Costet, N. (Nathalie), Criswell, R. (Rachel), Crozier, S. (Sarah), Eggesbø, M. (Merete), Fantini, M.P. (Maria), Farchi, S. (Sara), Forastiere, F. (Francesco), van Gelder, M.M.H.J. (Marleen M H J), Georgiu, V. (Vagelis), Godfrey, N., Gori, D. (Davide), Hanke, W. (Wojciech), Heude, B. (Barbara), Hryhorczuk, D.O. (Daniel), Iñiguez, C. (Carmen), Inskip, H.M. (Hazel), Karvonen, S.L., Kenny, L.C. (Louise C.), Kull, C.A. (Christian), Lawlor, D.A. (Debbie), Lehmann, I. (Irina), Magnus, P. (Per), Manios, Y., Melén, E. (Erik), Mommers, M. (Monique), Morgen, C.S. (Camilla S.), Moschonis, G. (George), Murray, D. (Deirdre), Nohr, C. (Christian), Nybo Andersen, A.-M. (Anne-Marie), Oken, E. (Emily), Oostvogels, A.J.J.M. (Adriëtte J J M), Papadopoulou, E. (Eleni), Pekkanen, J. (Juha), Pizzi, C. (Costanza), Polanska, K. (Kinga), Porta, D. (Daniela), Richiardi, L. (Lorenzo), Rifas-Shiman, S.L. (Sheryl), Roeleveld, N. (Nel), Rusconi, F. (Franca), Santos, A.C. (Ana Cristina), Sørensen, T.I.A. (Thorkild), Standl, M. (Marie), Stoltenberg, C. (Camilla), Sunyer, J. (Jordi), Thiering, E. (Elisabeth), Thijs, C. (Carel), Torrent, M. (Maties), Vrijkotte, T.G.M. (Tanja), Wright, J. (John), Zvinchuk, O. (Oleksandr), Gaillard, R. (Romy), Jaddoe, V.W.V. (Vincent), Philips, E.M. (Elise), Santos, S.M.S. (Susana), Trasande, L. (Leonardo), Aurrekoetxea, J.J. (Juan José), Barros, A.I. (Ana), Berg, A. (Andrea) von, Bergström, A. (Anna), Bird, P.K. (Philippa K.), Brescianini, S. (Sonia), Ní Chaoimh, C. (Carol), Charles, M.A., Chatzi, L. (Leda), Chevrier, C. (Cécile), Chrousos, G.P., Costet, N. (Nathalie), Criswell, R. (Rachel), Crozier, S. (Sarah), Eggesbø, M. (Merete), Fantini, M.P. (Maria), Farchi, S. (Sara), Forastiere, F. (Francesco), van Gelder, M.M.H.J. (Marleen M H J), Georgiu, V. (Vagelis), Godfrey, N., Gori, D. (Davide), Hanke, W. (Wojciech), Heude, B. (Barbara), Hryhorczuk, D.O. (Daniel), Iñiguez, C. (Carmen), Inskip, H.M. (Hazel), Karvonen, S.L., Kenny, L.C. (Louise C.), Kull, C.A. (Christian), Lawlor, D.A. (Debbie), Lehmann, I. (Irina), Magnus, P. (Per), Manios, Y., Melén, E. (Erik), Mommers, M. (Monique), Morgen, C.S. (Camilla S.), Moschonis, G. (George), Murray, D. (Deirdre), Nohr, C. (Christian), Nybo Andersen, A.-M. (Anne-Marie), Oken, E. (Emily), Oostvogels, A.J.J.M. (Adriëtte J J M), Papadopoulou, E. (Eleni), Pekkanen, J. (Juha), Pizzi, C. (Costanza), Polanska, K. (Kinga), Porta, D. (Daniela), Richiardi, L. (Lorenzo), Rifas-Shiman, S.L. (Sheryl), Roeleveld, N. (Nel), Rusconi, F. (Franca), Santos, A.C. (Ana Cristina), Sørensen, T.I.A. (Thorkild), Standl, M. (Marie), Stoltenberg, C. (Camilla), Sunyer, J. (Jordi), Thiering, E. (Elisabeth), Thijs, C. (Carel), Torrent, M. (Maties), Vrijkotte, T.G.M. (Tanja), Wright, J. (John), Zvinchuk, O. (Oleksandr), Gaillard, R. (Romy), and Jaddoe, V.W.V. (Vincent)

Abstract

BACKGROUND: Fetal smoke exposure is a common and key avoidable risk factor for birth complications and seems to influence later risk of overweight. It is unclear whether this increased risk is also present if mothers smoke during the first trimester only or reduce the number of cigarettes during pregnancy, or when only fathers smoke. We aimed to assess the associations of parental smoking during pregnancy, specifically of quitting or reducing smoking and maternal and paternal smoking combined, with preterm birth, small size for gestational age, and childhood overweight. METHODS AND FINDINGS: We performed an individual participant data meta-analysis among 229,158 families from 28 pregnancy/birth cohorts from Europe and North America. All 28 cohorts had information on maternal smoking, and 16 also had information on paternal smoking. In total, 22 cohorts were population-based, with birth years ranging from 1991 to 2015. The mothers' median age was 30.0 years, and most mothers were medium or highly educated. We used multilevel binary logistic regression models adjusted for maternal and paternal sociodemographic and lifestyle-related characteristics. Compared with nonsmoking mothers, maternal first trimester smoking only was not associated with adverse birth outcomes but was associated with a higher risk of childhood overweight (odds ratio [OR] 1.17 [95% CI 1.02-1.35], P value = 0.030). Children from mothers who continued smoking during pregnancy had higher risks of preterm birth (OR 1.08 [95% CI 1.02-1.15], P value = 0.012), small size for gestational age (OR 2.15 [95% CI 2.07-2.23], P value < 0.001), and childhood overweight (OR 1.42 [95% CI 1.35-1.48], P value < 0.001). Mothers who reduced the number of cigarettes between the first and third trimester, without quitting, still had a higher risk of small size for gestational age. However, the corresponding risk estimates were smaller than for women who continued the same amount of cigarettes throughout pregnancy (OR 1.

Published
2020
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5. Epigenome-wide meta-analysis of blood DNA methylation in newborns and children identifies numerous loci related to gestational age

Author

Merid, S.K. (Simon Kebede), Novoloaca, A. (Alexei), Sharp, G.C. (Gemma C.), Küpers, A.M. (Marlijn), Kho, A.T. (Alvin T.), Roy, R. (Ritu), Gao, L. (Lu), Annesi-Maesano, I. (Isabella), Jain, P. (Pooja), Plusquin, M. (Michelle), Kogevinas, M. (Manolis), Allard, C. (Catherine), Vehmeijer, F.O.L. (Florianne O.L.), Kazmi, N. (Nabila), Salas, L.A. (Lucas A.), Rezwan, F.I. (Faisal I.), Zhang, H. (Hongmei), Sebert, S. (Sylvain), Czamara, D. (Darina), Rifas-Shiman, S.L. (Sheryl), Melton, P.E. (Phillip E.), Lawlor, D.A. (Debbie A.), Pershagen, G. (Göran), Breton, C. (Carrie), Huen, K. (Karen), Baïz, N. (Nour), Gagliardi, L. (Luigi), Nawrot, T.S. (Tim S.), Corpeleijn, E. (Eva), Perron, P. (Patrice), Duijts, L. (Liesbeth), Nohr, C. (Christian), Bustamante, M. (Mariona), Ewart, S. (Susan), Karmaus, W. (Wilfried), Zhao, S. (Shanshan), Page, C.M. (Christian M.), Herceg, Z. (Zdenko), Jarvelin, M.-R. (Marjo-Riitta), Lahti, J. (Jari), Baccarelli, A.A. (Andrea), Anderson, D. (Denise), Kachroo, P. (Priyadarshini), Relton, C.L. (Caroline), Bergström, A. (Anna), Eskenazi, B. (B.), Soomro, M.H. (Munawar Hussain), Vineis, P. (Paolo), Snieder, H. (Harold), Bouchard, L. (Luigi), Jaddoe, V.W.V. (Vincent), Sørensen, T.I.A. (Thorkild), Vrijheid, M. (Martine), Arshad, S.H. (Syed), Holloway, J.W. (John W.), Håberg, S.E. (Siri E), Magnus, P. (Per), Dwyer, T. (Terence), Binder, E.B. (Elisabeth), Demeo, D.L. (Dawn), Vonk, J.M. (Judith), Newnham, J.P. (John), Tantisira, K.G. (Kelan G.), Kull, C.A. (Christian), Wiemels, J. (Joseph), Heude, B. (Barbara), Sunyer, J. (Jordi), Nystad, W. (Wenche), Munthe-Kaas, M.C. (Monica Cheng), Räikkönen, K. (Katri), Oken, E. (Emily), Huang, R.-C. (Rae-Chi), Weiss, S.T. (Scott T.), Antó, J.M. (Josep Maria), Bousquet, J. (Jean), Kumar, A. (Ashish), Söderhäll, C. (Cilla), Almqvist, C. (Catarina), Cardenas, A. (Andres), Gruzieva, O. (Olena), Xu, C.-J. (Cheng-Jian), Reese, S.E. (Sarah E.), Kere, J. (Juha), Brodin, P. (Petter), Solomon, O. (Olivia), Wielscher, M. (Matthias), Holland, N. (Nina), Ghantous, A. (Akram), Hivert, M.-F. (Marie-France), Felix, J.F. (Janine), Koppelman, G.H. (Gerard), London, S.J. (Stephanie J.), Melén, E. (Erik), Merid, S.K. (Simon Kebede), Novoloaca, A. (Alexei), Sharp, G.C. (Gemma C.), Küpers, A.M. (Marlijn), Kho, A.T. (Alvin T.), Roy, R. (Ritu), Gao, L. (Lu), Annesi-Maesano, I. (Isabella), Jain, P. (Pooja), Plusquin, M. (Michelle), Kogevinas, M. (Manolis), Allard, C. (Catherine), Vehmeijer, F.O.L. (Florianne O.L.), Kazmi, N. (Nabila), Salas, L.A. (Lucas A.), Rezwan, F.I. (Faisal I.), Zhang, H. (Hongmei), Sebert, S. (Sylvain), Czamara, D. (Darina), Rifas-Shiman, S.L. (Sheryl), Melton, P.E. (Phillip E.), Lawlor, D.A. (Debbie A.), Pershagen, G. (Göran), Breton, C. (Carrie), Huen, K. (Karen), Baïz, N. (Nour), Gagliardi, L. (Luigi), Nawrot, T.S. (Tim S.), Corpeleijn, E. (Eva), Perron, P. (Patrice), Duijts, L. (Liesbeth), Nohr, C. (Christian), Bustamante, M. (Mariona), Ewart, S. (Susan), Karmaus, W. (Wilfried), Zhao, S. (Shanshan), Page, C.M. (Christian M.), Herceg, Z. (Zdenko), Jarvelin, M.-R. (Marjo-Riitta), Lahti, J. (Jari), Baccarelli, A.A. (Andrea), Anderson, D. (Denise), Kachroo, P. (Priyadarshini), Relton, C.L. (Caroline), Bergström, A. (Anna), Eskenazi, B. (B.), Soomro, M.H. (Munawar Hussain), Vineis, P. (Paolo), Snieder, H. (Harold), Bouchard, L. (Luigi), Jaddoe, V.W.V. (Vincent), Sørensen, T.I.A. (Thorkild), Vrijheid, M. (Martine), Arshad, S.H. (Syed), Holloway, J.W. (John W.), Håberg, S.E. (Siri E), Magnus, P. (Per), Dwyer, T. (Terence), Binder, E.B. (Elisabeth), Demeo, D.L. (Dawn), Vonk, J.M. (Judith), Newnham, J.P. (John), Tantisira, K.G. (Kelan G.), Kull, C.A. (Christian), Wiemels, J. (Joseph), Heude, B. (Barbara), Sunyer, J. (Jordi), Nystad, W. (Wenche), Munthe-Kaas, M.C. (Monica Cheng), Räikkönen, K. (Katri), Oken, E. (Emily), Huang, R.-C. (Rae-Chi), Weiss, S.T. (Scott T.), Antó, J.M. (Josep Maria), Bousquet, J. (Jean), Kumar, A. (Ashish), Söderhäll, C. (Cilla), Almqvist, C. (Catarina), Cardenas, A. (Andres), Gruzieva, O. (Olena), Xu, C.-J. (Cheng-Jian), Reese, S.E. (Sarah E.), Kere, J. (Juha), Brodin, P. (Petter), Solomon, O. (Olivia), Wielscher, M. (Matthias), Holland, N. (Nina), Ghantous, A. (Akram), Hivert, M.-F. (Marie-France), Felix, J.F. (Janine), Koppelman, G.H. (Gerard), London, S.J. (Stephanie J.), and Melén, E. (Erik)

Abstract

BACKGROUND: Preterm birth and shorter duration of pregnancy are associated with increased morbidity in neonatal and later life. As the epigenome is known to have an important role during fetal development, we investigated associations between gestational age and blood DNA methylation in children. METHODS: We performed meta-analysis of Illumina's HumanMethylation450-array associations between gestational age and cord blood DNA methylation in 3648 newborns from 17 cohorts without common pregnancy complications, induced delivery or caesarean section. We also explored associations of gestational age with DNA methylation measured at 4-18 years in additional pediatric cohorts. Follow-up analyses of DNA methylation and gene expression correlations were performed in cord blood. DNA methylation profiles were also explored in tissues relevant for gestational age health effects: fetal brain and lung. RESULTS: We identified 8899 CpGs in cord blood that were associated with gestational age (range 27-42 weeks), at Bonferroni significance, P < 1.06 × 10- 7, of which 3343 were novel. These were annotated to 4966 genes. After restricting findings to at least three significant adjacent CpGs, we identified 1276 CpGs annotated to 325 genes. Results were generally consistent when analyses were restricted to term births. Cord blood findings tended not to persist into childhood and adolescence. Pathway analyses identified enrichment for biological processes critical to embryonic development. Follow-up of identified genes showed correlations between gestational age and DNA methylation levels in fetal brain and lung tissue, as well as correlation with expression levels. CONCLUSIONS: We identified numerous CpGs differentially methylated in relation to gestational age at birth that appear to reflect fetal developmental processes across tissues. These findings may contribute to understanding mechanisms linking gestational age to health effects.

Published
2020
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6. Epigenome-wide meta-analysis of DNA methylation and childhood asthma

Author

Reese, S. E. (Sarah E.), Xu, C.-J. (Cheng-Jian), den Dekker, H. T. (Herman T.), Lee, M. K. (Mi Kyeong), Sikdar, S. (Sinjini), Ruiz-Arenas, C. (Carlos), Merid, S. K. (Simon K.), Rezwan, F. I. (Faisal I.), Page, C. M. (Christian M.), Ullemar, V. (Vilhelmina), Melton, P. E. (Phillip E.), Oh, S. S. (Sam S.), Yang, I. V. (Ivana V.), Burrows, K. (Kimberley), Söderhäll, C. (Cilla), Jima, D. D. (Dereje D.), Gao, L. (Lu), Arathimos, R. (Ryan), Küpers, L. K. (Leanne K.), Wielscher, M. (Matthias), Rzehak, P. (Peter), Lahti, J. (Jari), Laprise, C. (Catherine), Madore, A.-M. (Anne-Marie), Ward, J. (James), Bennett, B. D. (Brian D.), Wang, T. (Tianyuan), Bell, D. A. (Douglas A.), T. B. (The BIOS consortium), Vonk, J. M. (Judith M.), Håberg, S. E. (Siri E.), Zhao, S. (Shanshan), Karlsson, R. (Robert), Hollams, E. (Elysia), Hu, D. (Donglei), Richards, A. J. (Adam J.), Bergström, A. (Anna), Sharp, G. C. (Gemma C.), Felix, J. F. (Janine F.), Bustamante, M. (Mariona), Gruzieva, O. (Olena), Maguire, R. L. (Rachel L.), Gilliland, F. (Frank), Baïz, N. (Nour), Nohr, E. A. (Ellen A.), Corpeleijn, E. (Eva), Sebert, S. (Sylvain), Karmaus, W. (Wilfried), Grote, V. (Veit), Kajantie, E. (Eero), Magnus, M. C. (Maria C.), Örtqvist, A. K. (Anne K.), Eng, C. (Celeste), Liu, A. H. (Andrew H.), Kull, I. (Inger), Jaddoe, V. W. (Vincent W.V.), Sunyer, J. (Jordi), Kere, J. (Juha), Hoyo, C. (Cathrine), Annesi-Maesano, I. (Isabella), Arshad, S. H. (Syed Hasan), Koletzko, B. (Berthold), Brunekreef, B. (Bert), Binder, E. B. (Elisabeth B.), Räikkönen, K. (Katri), Reischl, E. (Eva), Holloway, J. W. (John W.), Järvelin, M.-R. (Marjo-Riitta), Snieder, H. (Harold), Kazmi, N. (Nabila), Breton, C. V. (Carrie V.), Murphy, S. K. (Susan K.), Pershagen, G. (Göran), Anto, J. M. (Josep Maria), Relton, C. L. (Caroline L.), Schwartz, D. A. (David A.), Burchard, E. G. (Esteban G.), Huang, R.-C. (Rae-Chi), Nystad, W. (Wenche), Almqvist, C. (Catarina), Henderson, A. J. (A. John), Melén, E. (Erik), Duijts, L. (Liesbeth), Koppelman, G. H. (Gerard H.), and London, S. J. (Stephanie J.)

Subjects
epigenetics, newborn, methylation, asthma, drug development, childhood
Abstract

Background: Epigenetic mechanisms, including methylation, can contribute to childhood asthma. Identifying DNA methylation profiles in asthmatic patients can inform disease pathogenesis. Objective: We sought to identify differential DNA methylation in newborns and children related to childhood asthma. Methods: Within the Pregnancy And Childhood Epigenetics consortium, we performed epigenome-wide meta-analyses of school-age asthma in relation to CpG methylation (Illumina450K) in blood measured either in newborns, in prospective analyses, or cross-sectionally in school-aged children. We also identified differentially methylated regions. Results: In newborns (8 cohorts, 668 cases), 9 CpGs (and 35 regions) were differentially methylated (epigenome-wide significance, false discovery rate < 0.05) in relation to asthma development. In a cross-sectional meta-analysis of asthma and methylation in children (9 cohorts, 631 cases), we identified 179 CpGs (false discovery rate < 0.05) and 36 differentially methylated regions. In replication studies of methylation in other tissues, most of the 179 CpGs discovered in blood replicated, despite smaller sample sizes, in studies of nasal respiratory epithelium or eosinophils. Pathway analyses highlighted enrichment for asthma-relevant immune processes and overlap in pathways enriched both in newborns and children. Gene expression correlated with methylation at most loci. Functional annotation supports a regulatory effect on gene expression at many asthma-associated CpGs. Several implicated genes are targets for approved or experimental drugs, including IL5RA and KCNH2. Conclusion: Novel loci differentially methylated in newborns represent potential biomarkers of risk of asthma by school age. Cross-sectional associations in children can reflect both risk for and effects of disease. Asthma-related differential methylation in blood in children was substantially replicated in eosinophils and respiratory epithelium.

Published
2019

7. Prenatal Particulate Air Pollution and DNA Methylation in Newborns: An Epigenome-Wide Meta-Analysis

Author

Gruzieva, O. (Olena), Xu, C.-J. (Cheng-Jian), Yousefi, P. (Paul), Relton, C.L. (Caroline), Merid, S.K. (Simon Kebede), Breton, C. (Carrie), Gao, L. (Lu), Volk, H.E. (Heather E.), Feinberg, J.I. (Jason I.), Ladd-Acosta, C. (Christine), Bakulski, K. (Kelly), Auffray, C. (C.), Lemonnier, N. (Nathanaël), Plusquin, M. (Michelle), Ghantous, A. (Akram), Herceg, Z. (Zdenko), Nawrot, T.S. (Tim S.), Pizzi, C. (Costanza), Richiardi, L. (Lorenzo), Rusconi, F. (Franca), Vineis, P. (Paolo), Kogevinas, M. (Manolis), Felix, J.F. (Janine), Duijts, L. (Liesbeth), Dekker, H.T. (Herman) den, Jaddoe, V.W.V. (Vincent), Ruiz, J.L. (José L), Bustamante, M. (Mariona), Anto, J.M. (Josep), Sunyer, J. (Jordi), Vrijheid, M. (Martine), Gutzkow, K.B. (Kristine B.), Grazuleviciene, R. (Regina), Hernandez-Ferrer, C. (Carles), Annesi-Maesano, I. (Isabella), Lepeule, J. (Johanna), Bousquet, J. (Jean), Bergström, A. (Anna), Kull, C.A. (Christian), Söderhäll, C. (Cilla), Kere, J. (Juha), Gehring, U. (Ulrike), Brunekreef, B. (Bert), Just, A.C. (Allan C.), Wright, R.J. (Rosalind J.), Peng, C. (Cheng), Gold, D.R. (Diane), Kloog, I. (Itai), Demeo, D.L. (Dawn), Pershagen, G. (Göran), Koppelman, G.H. (Gerard), London, S.J. (Stephanie J.), Baccarelli, A.A. (Andrea), Melén, E. (Erik), Gruzieva, O. (Olena), Xu, C.-J. (Cheng-Jian), Yousefi, P. (Paul), Relton, C.L. (Caroline), Merid, S.K. (Simon Kebede), Breton, C. (Carrie), Gao, L. (Lu), Volk, H.E. (Heather E.), Feinberg, J.I. (Jason I.), Ladd-Acosta, C. (Christine), Bakulski, K. (Kelly), Auffray, C. (C.), Lemonnier, N. (Nathanaël), Plusquin, M. (Michelle), Ghantous, A. (Akram), Herceg, Z. (Zdenko), Nawrot, T.S. (Tim S.), Pizzi, C. (Costanza), Richiardi, L. (Lorenzo), Rusconi, F. (Franca), Vineis, P. (Paolo), Kogevinas, M. (Manolis), Felix, J.F. (Janine), Duijts, L. (Liesbeth), Dekker, H.T. (Herman) den, Jaddoe, V.W.V. (Vincent), Ruiz, J.L. (José L), Bustamante, M. (Mariona), Anto, J.M. (Josep), Sunyer, J. (Jordi), Vrijheid, M. (Martine), Gutzkow, K.B. (Kristine B.), Grazuleviciene, R. (Regina), Hernandez-Ferrer, C. (Carles), Annesi-Maesano, I. (Isabella), Lepeule, J. (Johanna), Bousquet, J. (Jean), Bergström, A. (Anna), Kull, C.A. (Christian), Söderhäll, C. (Cilla), Kere, J. (Juha), Gehring, U. (Ulrike), Brunekreef, B. (Bert), Just, A.C. (Allan C.), Wright, R.J. (Rosalind J.), Peng, C. (Cheng), Gold, D.R. (Diane), Kloog, I. (Itai), Demeo, D.L. (Dawn), Pershagen, G. (Göran), Koppelman, G.H. (Gerard), London, S.J. (Stephanie J.), Baccarelli, A.A. (Andrea), and Melén, E. (Erik)

Abstract

BACKGROUND: Prenatal exposure to air pollution has been associated with childhood respiratory disease and other adverse outcomes. Epigenetics is a suggested link between exposures and health outcomes. OBJECTIVES: We aimed to investigate associations between prenatal exposure to particulate matter (PM) with diameter [Formula: see text] ([Formula: see text]) or [Formula: see text] ([Formula: see text]) and DNA methylation in newborns and children. METHODS: We meta-analyzed associations between exposure to [Formula: see text] ([Formula: see text]) and [Formula: see text] ([Formula: see text]) at maternal home addresses during pregnancy and newborn DNA methylation assessed by Illumina Infinium HumanMethylation450K BeadChip in nine European and American studies, with replication in 688 independent newborns and look-up analyses in 2,118 older children. We used two approaches, one focusing on single cytosine-phosphate-guanine (CpG) sites and another on differentially methylated regions (DMRs). We also related PM exposures to blood mRNA expression. RESULTS: Six CpGs were significantly associa

Published
2019
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8. DNA Methylation in Newborns and Maternal Smoking in Pregnancy: Genome-wide Consortium Meta-analysis

Author

Joubert, B.R. (Bonnie), Felix, J.F. (Janine), Yousefi, P. (Paul), Bakulski, K.M. (Kelly M.), Just, A.C. (Allan C.), Breton, C. (Carrie), Reese, S.E. (Sarah E.), Markunas, C.A. (Christina A.), Richmond, R.C. (Rebecca C.), Xu, C.-J. (Cheng-Jian), Küpers, L.K. (Leanne), Oh, S.S. (Sam S.), Hoyo, C. (Cathrine), Gruzieva, O. (Olena), Söderhäll, C. (Cilla), Salas, L.A. (Lucas A.), Baïz, N. (Nour), Zhang, H. (Hongmei), Lepeule, J. (Johanna), Ruiz, C. (Carlos), Ligthart, S. (Symen), Wang, T. (Tianyuan), Taylor, J.A. (Jack A.), Duijts, L. (Liesbeth), Sharp, G.C. (Gemma C.), Jankipersadsing, S.A. (Soesma A.), Nilsen, R.M. (Roy M.), Vaez, A. (Ahmad), Fallin, M.D. (M. Daniele), Hu, D. (Donglei), Litonjua, A.A. (Augusto), Fuemmeler, B.F. (Bernard F.), Huen, K. (Karen), Kere, J. (Juha), Kull, C.A. (Christian), Munthe-Kaas, M.C. (Monica Cheng), Gehring, U. (Ulrike), Bustamante, M. (Mariona), Saurel-Coubizolles, M.J. (Marie José), Quraishi, B.M. (Bilal M.), Ren, J. (Jie), Tost, J. (Jörg), Gonzalez, J.R. (Juan R.), Peters, M.J. (Marjolein), Håberg, S.E. (Siri E), Xu, Z. (Zongli), Meurs, J.B.J. (Joyce) van, Gaunt, T.R. (Tom), Kerkhof, M. (Marjan), Corpeleijn, W.E. (Willemijn), Feinberg, A.P. (Andrew P.), Eng, C. (Celeste), Baccarelli, A.A. (Andrea), Benjamin Neelon, S.E. (Sara E.), Bradman, A. (Asa), Merid, S.K. (Simon Kebede), Bergström, A. (Anna), Herceg, Z. (Zdenko), Hernandez-Vargas, H. (Hector), Brunekreef, B. (Bert), Pinart, M. (Mariona), Heude, B. (Barbara), Ewart, S. (Susan), Yao, J. (Jin), Lemonnier, N. (Nathanaël), Franco, O.H. (Oscar), Wu, M.C. (Michael), Hofman, A. (Albert), McArdle, W.L. (Wendy), Vlies, P. (P.) van der, Falahi, F. (Fahimeh), Gillman, M.W. (Matthew W.), Barcellos, L.F. (Lisa), Kumar, A. (Ashish), Wickman, M. (Magnus), Guerra, S. (S.), Charles, M.-A. (Marie-Aline), Holloway, J. (John), Auffray, C. (C.), Tiemeier, H.W. (Henning), Smith, A.V. (Davey), Postma, D.S. (Dirkje), Hivert, M.-F. (Marie-France), Eskenazi, B. (Brenda), Vrijheid, M. (Martine), Arshad, H. (Hasan), Anto, J.M. (Josep), Dehghan, A. (Abbas), Karmaus, W. (Wilfried), Annesi-Maesano, I. (Isabella), Sunyer, J. (Jordi), Ghantous, A. (Akram), Pershagen, G. (Göran), Holland, N. (Nina), Murphy, S.K. (Susan K.), Demeo, D.L. (Dawn), Burchard, E.G. (Esteban), Ladd-Acosta, C. (Christine), Snieder, H. (Harold), Nystad, W. (Wenche), Koppelman, G.H. (Gerard), Relton, C.L. (Caroline), Jaddoe, V.W.V. (Vincent), Wilcox, A.J. (Allen), Melén, E. (Erik), London, S.J. (Stephanie J.), Joubert, B.R. (Bonnie), Felix, J.F. (Janine), Yousefi, P. (Paul), Bakulski, K.M. (Kelly M.), Just, A.C. (Allan C.), Breton, C. (Carrie), Reese, S.E. (Sarah E.), Markunas, C.A. (Christina A.), Richmond, R.C. (Rebecca C.), Xu, C.-J. (Cheng-Jian), Küpers, L.K. (Leanne), Oh, S.S. (Sam S.), Hoyo, C. (Cathrine), Gruzieva, O. (Olena), Söderhäll, C. (Cilla), Salas, L.A. (Lucas A.), Baïz, N. (Nour), Zhang, H. (Hongmei), Lepeule, J. (Johanna), Ruiz, C. (Carlos), Ligthart, S. (Symen), Wang, T. (Tianyuan), Taylor, J.A. (Jack A.), Duijts, L. (Liesbeth), Sharp, G.C. (Gemma C.), Jankipersadsing, S.A. (Soesma A.), Nilsen, R.M. (Roy M.), Vaez, A. (Ahmad), Fallin, M.D. (M. Daniele), Hu, D. (Donglei), Litonjua, A.A. (Augusto), Fuemmeler, B.F. (Bernard F.), Huen, K. (Karen), Kere, J. (Juha), Kull, C.A. (Christian), Munthe-Kaas, M.C. (Monica Cheng), Gehring, U. (Ulrike), Bustamante, M. (Mariona), Saurel-Coubizolles, M.J. (Marie José), Quraishi, B.M. (Bilal M.), Ren, J. (Jie), Tost, J. (Jörg), Gonzalez, J.R. (Juan R.), Peters, M.J. (Marjolein), Håberg, S.E. (Siri E), Xu, Z. (Zongli), Meurs, J.B.J. (Joyce) van, Gaunt, T.R. (Tom), Kerkhof, M. (Marjan), Corpeleijn, W.E. (Willemijn), Feinberg, A.P. (Andrew P.), Eng, C. (Celeste), Baccarelli, A.A. (Andrea), Benjamin Neelon, S.E. (Sara E.), Bradman, A. (Asa), Merid, S.K. (Simon Kebede), Bergström, A. (Anna), Herceg, Z. (Zdenko), Hernandez-Vargas, H. (Hector), Brunekreef, B. (Bert), Pinart, M. (Mariona), Heude, B. (Barbara), Ewart, S. (Susan), Yao, J. (Jin), Lemonnier, N. (Nathanaël), Franco, O.H. (Oscar), Wu, M.C. (Michael), Hofman, A. (Albert), McArdle, W.L. (Wendy), Vlies, P. (P.) van der, Falahi, F. (Fahimeh), Gillman, M.W. (Matthew W.), Barcellos, L.F. (Lisa), Kumar, A. (Ashish), Wickman, M. (Magnus), Guerra, S. (S.), Charles, M.-A. (Marie-Aline), Holloway, J. (John), Auffray, C. (C.), Tiemeier, H.W. (Henning), Smith, A.V. (Davey), Postma, D.S. (Dirkje), Hivert, M.-F. (Marie-France), Eskenazi, B. (Brenda), Vrijheid, M. (Martine), Arshad, H. (Hasan), Anto, J.M. (Josep), Dehghan, A. (Abbas), Karmaus, W. (Wilfried), Annesi-Maesano, I. (Isabella), Sunyer, J. (Jordi), Ghantous, A. (Akram), Pershagen, G. (Göran), Holland, N. (Nina), Murphy, S.K. (Susan K.), Demeo, D.L. (Dawn), Burchard, E.G. (Esteban), Ladd-Acosta, C. (Christine), Snieder, H. (Harold), Nystad, W. (Wenche), Koppelman, G.H. (Gerard), Relton, C.L. (Caroline), Jaddoe, V.W.V. (Vincent), Wilcox, A.J. (Allen), Melén, E. (Erik), and London, S.J. (Stephanie J.)

Abstract

Epigenetic modifications, including DNA methylation, represent a potential mechanism for environmental impacts on human disease. Maternal smoking in pregnancy remains an important public health problem that impacts child health in a myriad of ways and has potential lifelong consequences. The mechanisms are largely unknown, but epigenetics most likely plays a role. We formed the Pregnancy And Childhood Epigenetics (PACE) consortium and meta-analyzed, across 13 cohorts (n = 6,685), the association between maternal smoking in pregnancy and newborn blood DNA methylation at over 450,000 CpG sites (CpGs) by using the Illumina 450K BeadChip. Over 6,000 CpGs were differentially methylated in relation to maternal smoking at genome-wide statistical significance (false discovery rate, 5%), including 2,965 CpGs corresponding to 2,017 genes not previously related to smoking and methylation in either newborns or adults. Several genes are relevant to diseases that can be caused by maternal smoking (e.g., orofacial clefts and asthma) or adult smoking (e.g., certain cancers). A number of differentially methylated CpGs were associated with gene expression. We observed enrichment in pathwa

Published
2016
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10. European birth cohorts for environmental health research

Author

Vrijheid, M. (Martine), Casas, M. (Maribel), Bergström, A. (Anna), Carmichael, A. (Amanda), Cordier, S. (Sylvaine), Eggesbø, M. (Merete), Eller, E. (Esben), Fantini, M.P. (Maria), Fernandez, M.F. (Mariana), Fernández-Somoano, A. (Ana), Gehring, U. (Ulrike), Grazuleviciene, R. (Regina), Hohmann, C. (C.), Karvonen, S.L., Keil, M. (Mark), Kogevinas, M. (Manolis), Koppen, G. (Gudrun), Krämer, U. (Ursula), Kuehni, C. (Claudia), Magnus, P. (Per), Majewska, R. (Renata), Nybo Andersen, A.-M. (Anne-Marie), Patelarou, E. (Evridiki), Petersen, M.S. (Maria Skaalum), Pierik, F.H. (Frank), Polanska, K. (Kinga), Porta, D. (Daniela), Richiardi, L. (Lorenzo), Santos, A.C. (Ana Cristina), Slama, R. (Rémy), Sram, R.J. (Radim), Thijs, C. (Carel), Tischer, C. (Christina), Toft, G. (Gunnar), Trnovec, T. (Tomáš), Vandentorren, S. (Stéphanie), Vrijkotte, T.G.M. (Tanja), Wilhelm, M. (Michael), Wright, J. (Juliet), Nieuwenhuijsen, M. (Mark), Vrijheid, M. (Martine), Casas, M. (Maribel), Bergström, A. (Anna), Carmichael, A. (Amanda), Cordier, S. (Sylvaine), Eggesbø, M. (Merete), Eller, E. (Esben), Fantini, M.P. (Maria), Fernandez, M.F. (Mariana), Fernández-Somoano, A. (Ana), Gehring, U. (Ulrike), Grazuleviciene, R. (Regina), Hohmann, C. (C.), Karvonen, S.L., Keil, M. (Mark), Kogevinas, M. (Manolis), Koppen, G. (Gudrun), Krämer, U. (Ursula), Kuehni, C. (Claudia), Magnus, P. (Per), Majewska, R. (Renata), Nybo Andersen, A.-M. (Anne-Marie), Patelarou, E. (Evridiki), Petersen, M.S. (Maria Skaalum), Pierik, F.H. (Frank), Polanska, K. (Kinga), Porta, D. (Daniela), Richiardi, L. (Lorenzo), Santos, A.C. (Ana Cristina), Slama, R. (Rémy), Sram, R.J. (Radim), Thijs, C. (Carel), Tischer, C. (Christina), Toft, G. (Gunnar), Trnovec, T. (Tomáš), Vandentorren, S. (Stéphanie), Vrijkotte, T.G.M. (Tanja), Wilhelm, M. (Michael), Wright, J. (Juliet), and Nieuwenhuijsen, M. (Mark)

Published
2012
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