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Periconception maternal smoking and low education are associated with methylation of INSIGF in children at the age of 17 months

  • S. A. Obermann-Borst (a1), B. T. Heijmans (a2) (a3), P. H. C. Eilers (a4), E. W. Tobi (a2), E. A. P. Steegers (a1), P. E. Slagboom (a2) (a3) and R. P. M. Steegers-Theunissen (a1) (a5) (a6)...

Abstract

Maternal smoking during pregnancy and a low socioeconomic status (SES) lead to increased risks of adverse pregnancy outcome. Maternal education is often used as proxy for SES. We explored the programming of the insulin pathway genes IGF2 DMR (insulin growth factor 2 differentially methylated region), IGF2R (insulin growth factor 2 receptor) and INSIGF [the overlapping region of IGF2 and insulin (INS)] in the child through any periconception maternal smoking and education level. In 120 children at 17 months of age, methylation of DNA derived from white blood cells was measured. Periconception smoking and low education were independently associated with INSIGF methylation and showed a relative increase in methylation of +1.3%; P = 0.043 and +1.6%; P = 0.021. Smoking and low education showed an additive effect on INSIGF methylation (+2.8%; P = 0.011). There were no associations with IGF2 DMR and IGF2R methylation. Our data suggest that periconception maternal smoking and low education are associated with epigenetic marks on INSIGF in the very young child, this warrants further study in additional populations.

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Corresponding author

*Address for correspondence: Dr R. P. M. Steegers-Theunissen, Professor in Periconception Epidemiology, Erasmus MC, University Medical Centre, Department of Obstetrics and Gynaecology, Dr. Molewaterplein 50, 3015 GE Rotterdam, The Netherlands. (Email r.steegers@erasmusmc.nl)

References

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Keywords

Periconception maternal smoking and low education are associated with methylation of INSIGF in children at the age of 17 months

  • S. A. Obermann-Borst (a1), B. T. Heijmans (a2) (a3), P. H. C. Eilers (a4), E. W. Tobi (a2), E. A. P. Steegers (a1), P. E. Slagboom (a2) (a3) and R. P. M. Steegers-Theunissen (a1) (a5) (a6)...

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