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Genome-wide DNA methylation in 1-year-old infants of mothers with major depressive disorder

Published online by Cambridge University Press:  30 September 2016

Dante Cicchetti ,
Susan Hetzel ,
Fred A. Rogosch ,
Elizabeth D. Handley  and
Sheree L. Toth
Dante Cicchetti*
Affiliation:
University of Minnesota Institute of Child Development University of Rochester Mt. Hope Family Center
Susan Hetzel
Affiliation:
University of Minnesota Institute of Child Development
Fred A. Rogosch
Affiliation:
University of Rochester Mt. Hope Family Center
Elizabeth D. Handley
Affiliation:
University of Rochester Mt. Hope Family Center
Sheree L. Toth
Affiliation:
University of Rochester Mt. Hope Family Center
*
Address correspondence and reprint requests to: Dante Cicchetti, Institute of Child Development, University of Minnesota, 51 East River Road, Minneapolis, MN 55455; E-mail: cicchett@umn.edu.
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Abstract

A genome-wide methylation study was conducted among a sample of 114 infants (M age = 13.2 months, SD = 1.08) of low-income urban women with (n = 73) and without (n = 41) major depressive disorder. The Illumina HumanMethylation450 BeadChip array with a GenomeStudio Methylation Module and Illumina Custom model were used to conduct differential methylation analyses. Using the 5.0 × 10–7p value, 2,119 loci were found to be significantly different between infants of depressed and nondepressed mothers. Infants of depressed mothers had greater methylation at low methylation sites (0%–29%) compared to infants of nondepressed mothers. At high levels of methylation (70%–100%), the infants of depressed mothers were predominantly hypomethylated. The mean difference in methylation between the infants of depressed and infants of nondepressed mothers was 5.23%. Disease by biomarker analyses were also conducted using GeneGo MetaCore Software. The results indicated significant cancer-related differences in biomarker networks such as prostatic neoplasms, ovarian and breast neoplasms, and colonic neoplasms. The results of a process networks analysis indicated significant differences in process networks associated with neuronal development and central nervous system functioning, as well as cardiac development between infants of depressed and nondepressed mothers. These findings indicate that early in development, infants of mothers with major depressive disorder evince epigenetic differences relative to infants of well mothers that suggest risk for later adverse health outcomes.

Type
Regular Articles
Information
Development and Psychopathology , Volume 28 , Special Issue 4pt2: Epigenetics: Development, Psychopathology, Resilience, and Preventive Intervention , November 2016 , pp. 1413 - 1419
Copyright
Copyright © Cambridge University Press 2016 

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