Epigenetics and the biological basis of gene x environment interactions.

Abstract:

OBJECTIVE:Child and adolescent psychiatry is rife with examples of the sustained effects of early experience on brain function. The study of behavioral genetics provides evidence for a relation between genomic variation and personality and with the risk for psychopathology. A pressing challenge is that of conceptually integrating findings from genetics into the study of personality without regressing to arguments concerning the relative importance of genomic variation versus nongenomic or environmental influences. METHOD:Epigenetics refers to functionally relevant modifications to the genome that do not involve a change in nucleotide sequence. This review examines epigenetics as a candidate biological mechanism for gene x environment interactions, with a focus on environmental influences that occur during early life and that yield sustained effects on neural development and function. RESULTS:The studies reviewed suggest that epigenetic remodeling occurs in response to the environmental activation of cellular signalling pathways associated with synaptic plasticity, epigenetic marks are actively remodeled during early development in response to environmental events that regulate neural development and function, and epigenetic marks are subject to remodeling by environmental influences even at later stages in development. CONCLUSION:Epigenetic remodeling might serve as an ideal mechanism for phenotypic plasticity--the process whereby the environment interacts with the genome to produce individual differences in the expression of specific traits.

authors

Bagot RC,Meaney MJ

doi

10.1016/j.jaac.2010.06.001

subject

Has Abstract

pub_date

2010-08-01 00:00:00

pages

752-71

issue

8

eissn

0890-8567

issn

1527-5418

pii

S0890-8567(10)00455-7

journal_volume

49

pub_type

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