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Maternal exposure t...
Maternal exposure to cadmium during pregnancy is associated with changes in DNA methylation that are persistent at 9 years of age
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- Gliga, Anda R. (författare)
- Karolinska Institutet,Karolinska Institute,International Centre for Diarrhoeal Disease Research, Bangladesh
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- Malin Igra, Annachiara (författare)
- Karolinska Institutet,Karolinska Institute
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- Hellberg, Alexander (författare)
- Karolinska Institute
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- Engström, Karin (författare)
- Lund University,Lunds universitet,Avdelningen för arbets- och miljömedicin,Institutionen för laboratoriemedicin,Medicinska fakulteten,EPI@LUND,Forskargrupper vid Lunds universitet,Division of Occupational and Environmental Medicine, Lund University,Department of Laboratory Medicine,Faculty of Medicine,Lund University Research Groups
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- Raqib, Rubhana (författare)
- International Centre for Diarrhoeal Disease Research, Bangladesh
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- Rahman, Anisur (författare)
- International Centre for Diarrhoeal Disease Research, Bangladesh
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- Vahter, Marie (författare)
- Karolinska Institutet,Karolinska Institute
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- Kippler, Maria (författare)
- Karolinska Institutet,Karolinska Institute
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- Broberg, Karin (författare)
- Karolinska Institutet,Karolinska Institute
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(creator_code:org_t)
- Elsevier BV, 2022
- 2022
- Engelska.
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Ingår i: Environment International. - : Elsevier BV. - 0160-4120 .- 1873-6750. ; 163
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
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- Background: Cadmium (Cd) exposure during gestation has been associated with altered DNA methylation at birth, but it is not known if the changes in methylation persist into childhood. Objectives: To evaluate whether gestational Cd-related changes of DNA methylation persist from birth to 9 years of age. Methods: We studied mother–child dyads in a longitudinal cohort in rural Bangladesh. Cadmium concentrations in maternal blood (erythrocyte fraction; Ery-Cd) at gestational week 14 and in child urine (U-Cd, long-term exposure marker) at 9 years were measured using inductively coupled plasma mass spectrometry. The epigenome-wide DNA methylation was measured in mononuclear cells (PBMCs) prepared from cord blood and peripheral blood at 9 years in 71 children (hereafter referred to as the explorative group) by Infinium HumanMethylation450K BeadChip. Replication of one differentially methylated region (DMR; 9 CpG sites) was performed in PBMCs of 160 9-year-old children (validation group) by EpiTyper MALDI-TOF mass spectrometry. Results: The median maternal Ery-Cd concentration was 1.24 µg/kg (range 0.35, 4.55) in the explorative group and 0.83 µg/kg (0.08, 2.97) in the validation group. The median U-Cd concentration in the 9-year-old children was 0.26 µg/L (0.09, 1.06) in the explorative group and 0.32 µg/L (0.07, 1.33) in the validation group. In the explorative group, we identified ten DMRs, both in cord blood and in PBMCs at 9 years, that were associated with maternal Ery-Cd. Eight out of the ten DMRs were hypomethylated and three of the hypomethylated DMRs were located in the HLA region on chromosome 6. One of the DMRs (hypomethylated) in the HLA region (upstream of the zinc finger protein 57 homolog, ZFP57 gene) was replicated in the validation group, and we found that it was hypomethylated in relation to maternal Ery-Cd, but not child U-Cd. Conclusion: Gestational exposure to Cd appears to be associated with regional changes, especially hypomethylated, in DNA methylation that linger from birth up to prepubertal age.
Ämnesord
- MEDICIN OCH HÄLSOVETENSKAP -- Klinisk medicin -- Cancer och onkologi (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Clinical Medicine -- Cancer and Oncology (hsv//eng)
Nyckelord
- Cadmium exposure
- Child development
- DMR
- Epigenetic
- EWAS
- Programming
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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