Document Detail

Serotonin transporter allelic variation in mothers predicts maternal sensitivity, behavior and attitudes toward 6-month-old infants.
MedLine Citation:
PMID:  21232011     Owner:  NLM     Status:  MEDLINE    
Maternal behavior in the new mother is a multidimensional set of responses to infant cues that are influenced by the mother's early life experiences. In this study, we wanted to test if mothers' early life experiences and mothers' genotype have interactive effects on maternal behaviors and attitudes, something which has not been previously explored. In a sample of 204 mothers, we assessed maternal genotype at the serotonin transporter-linked polymorphic region (5-HTTLPR) and an adjacent upstream polymorphism (rs25531), together giving rise to three alleles: short (S), L(G) and L(A). Controlling for maternal age and parity, we showed that this genotype can predict differences in maternal sensitivity at 6 months postpartum: mothers with an S (or the functionally similar L(G)) allele were more sensitive than mothers who lacked the allele during a 30-min recorded mother-infant interaction (F (4,140) = 3.43; P = 0.01). Furthermore, we found highly significant gene-environment interactions in association with maternal behavior, such that mothers with no S or L(G) alleles oriented away more frequently from their babies if they also reported more negative early care quality (F (5,138) = 3.28; P = 0.008). Finally, we found significant gene-environment associations with maternal attitudes; mothers with the S allele and with greater early care quality scored higher on ratings of their perceived attachment to their baby (F (5,125) = 3.27; P = 0.008). The regression results show significant interactions between the reported quality of care mothers received from their own parents and genotype on both their frequency of orienting away from the infant during the interaction (F(5, 138) = 3.28; P = 0.008, Fig. 1a) and their perceived attachment feelings to the infant (F(5, 125) = 3.27; P = 0.008, Fig. 1b); however the direction of the effects for these two outcome measures were different from one another. With increasing care quality, mothers with the L(A)L(A) genotype (no S or L(G) allele) oriented away less frequently, while S or L(G) allele carriers showed no significant change. In contrast, with increasing early care quality. L(A)L(A) (no S or L(G) allele) mothers scored lower on perceived attachment to their infants, whereas S or L(G) allele carrying mothers scored higher. [corrected].
V Mileva-Seitz; J Kennedy; L Atkinson; M Steiner; R Levitan; S G Matthews; M J Meaney; M B Sokolowski; A S Fleming
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2011-01-13
Journal Detail:
Title:  Genes, brain, and behavior     Volume:  10     ISSN:  1601-183X     ISO Abbreviation:  Genes Brain Behav.     Publication Date:  2011 Apr 
Date Detail:
Created Date:  2011-04-01     Completed Date:  2012-03-06     Revised Date:  2012-04-06    
Medline Journal Info:
Nlm Unique ID:  101129617     Medline TA:  Genes Brain Behav     Country:  England    
Other Details:
Languages:  eng     Pagination:  325-33     Citation Subset:  IM    
Copyright Information:
© 2011 The Authors. Genes, Brain and Behavior © 2011 Blackwell Publishing Ltd and International Behavioural and Neural Genetics Society.
Institute of Medical Sciences, University of Toronto, Mississauga, Ontario.
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MeSH Terms
Brain Chemistry / genetics*
Child, Preschool
Cohort Studies
Gene Frequency / genetics*
Genetic Variation / genetics*
Infant, Newborn
Longitudinal Studies
Maternal Behavior / physiology*
Mother-Child Relations*
Polymorphism, Genetic / genetics
Predictive Value of Tests
Serotonin / metabolism
Serotonin Plasma Membrane Transport Proteins / genetics*
Grant Support
//Canadian Institutes of Health Research
Reg. No./Substance:
0/Serotonin Plasma Membrane Transport Proteins; 50-67-9/Serotonin
Erratum In:
Genes Brain Behav. 2012 Feb;11(1):125

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