Association between birth weight and DNA methylation of IGF2, glucocorticoid receptor and repetitive elements LINE-1 and Alu

作者：Burris Heather H^*; Braun Joe M; Byun Hyang Min; Tarantini Letizia; Mercado Adriana; Wright Rosalind J; Schnaas Lourdes; Baccarelli Andrea A; Wright Robert O; Tellez Rojo Martha M

来源：Epigenomics, 2013, 5(3): 271-281.

DOI：10.2217/EPI.13.24

• Alu
• birth weight
• DNA methylation
• fetal growth
• glucocorticoid receptor
• IGF2
• imprinting
• LINE-1
• NR3C1
• SNP

We examined the association between birth weight and methylation in the imprinted IGF/H19 loci, the nonimprinted gene NR3C1 and repetitive element DNA (LINE-1 and Alu). Materials %26 methods: We collected umbilical cord venous blood from 219 infants born in Mexico City (Mexico) as part of a prospective birth cohort study and analyzed DNA methylation using pyrosequencing. Results: Birth weight was not associated with DNA methylation of the regions studied. One of the CpG dinucleotides in the IGF2 imprinting control region (ICR) 1 includes a potential C-T SNP. Among individuals with an absence of methylation at this site, probably due to a paternally inherited T allele, birth weight was associated with mean methylation status of both IGF2 ICR1 and ICR2. However, this association would not have survived adjustment for multiple testing. Conclusion: While we did not detect an association between DNA methylation and birth weight, our study suggests a potential gene-epigene interaction between a T allele in the IGF2 ICR1 and methylation of ICRs of IGF2, and fetal growth.

• 出版日期2013-6