Cited by 155Epigenetics and DNA MethylationNeurotransmitter Receptor Influence on BehaviorStress Responses and Cortisol

Epigenetic regulation of serotonin transporter expression and behavior in infant rhesus macaques

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Kinnally, E. L., Capitanio, J. P., Leibel, R., Deng, L., LeDuc, C., Haghighi, F., Mann, J. J.·2010·Genes, Brain and Behavior

Abstract

Epigenetic mechanisms may moderate genetic and environmental risk ( G × E ) for mood disorders. We used an experimental rhesus macaque model of early life stress to test whether epigenetic regulation of serotonin transporter ( 5‐HTT) may contribute to G × E interactions that influence behavior and emotion. We hypothesized that peripheral blood mononuclear cell (PBMC) DNA methylation within an 800 bp cytosine–phosphate–guanosine (CpG) island that overlaps with the 5‐HTT transcription initiation start site, a hypothesized model of the same genomic region in brain tissue, would mediate or moderate the effects of early life stress and a functional 5‐HTT promoter polymorphism ( rh5‐HTTLPR) on two outcomes: PBMC 5‐HTT expression and behavioral stress reactivity. Eighty‐seven infant rhesus macaques (3–4 months of age) were either mother reared in large social groups ( n = 70) or nursery reared ( n = 17). During a maternal/social separation, infants' blood was sampled and behavioral stress reactivity recorded. PBMC DNA and RNA samples were used to determine rh5‐HTTLPR genotype, 5‐HTT mRNA expression using quantitative reverse transcription polymerase chain reaction (qRT‐PCR) and 5‐HTT CpG methylation status using sodium bisulfite pyrosequencing. Consistent with human data, carriers of the low‐expressing rh5‐HTTLPR alleles exhibited higher mean 5‐HTT CpG methylation, which was associated with lower PBMC 5‐HTT expression. Higher 5‐HTT CpG methylation, but not rh5‐HTTLPR genotype, exacerbated the effects of early life stress on behavioral stress reactivity in infants. 5‐HTT CpG methylation may be an important regulator of 5 ‐HTT expression early in development and may contribute to the risk for mood disorders observed in ‘high‐risk’ 5‐HTTLPR carriers.

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  • Recent studies on humans and macaque monkeys showed that higher methylation levels of the 5-HTT gene were associated with stronger effects of stress.

    “recent studies on humans and macaque monkeys showed that higher methylation levels of the 5-HTT gene were associated with stronger effects of stress 133, 134.”

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  1. Heils A Teufel A Petri S Stober G Riederer P Bengel D Lesch KP Allelic variation of human serotonin transporter gene expression Journal of Neurochemistry 1996 2621 2624 8632190
  2. Lu J Le François B Burns AM Stockmeier CA Austin MC Overholser JC Jurjus G Meltzer HY Albert PR Increased DNA methylation of the 5-HT1A receptor promoter in suicide brain. CINP 50th Meeting, July 14–17, Munich, Germany International Journal of Neuropsychopharmacology 2008 11 Suppl. 1 105
  3. Nemeroff C Early-Life Adversity, CRF Dysregulation, and Vulnerability to Mood and Anxiety Disorders Psychopharmacology Bulletin 2004 38 14 20 15278013

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Authors
Kinnally, E. L., Capitanio, J. P., Leibel, R., Deng, L., LeDuc, C., Haghighi, F., & Mann, J. J.
Affiliations
  • Columbia University (US)
  • University of California, Davis (US)
Corresponding author
Kinnally, E. L.
Venue
Genes, Brain and Behavior
Publisher
Wiley
Published
2010-08
Volume
9
Issue
6
Pages
575-582
ISSN
  • 1601-183X (ISSN-L)
  • 1601-1848
OpenAlex
W2089883957
Cited by
155
References
44
Citations by year
2026: 3 · 2025: 2 · 2024: 4 · 2023: 4 · 2022: 5 · 2021: 4 · 2020: 4 · 2019: 5 · 2018: 11 · 2017: 15 · 2016: 14 · 2015: 18 · 2014: 14 · 2013: 16 · 2012: 19
FWCI
6.77
Type
journal article
Language
en
Open access
Locations
  • Genes Brain & Behavior (publishedVersion)
  • PubMed (publishedVersion)
  • PubMed Central (acceptedVersion)
Funders
  • National Institutes of Health (R24OD010962)
  • National Institute of Mental Health (T32MH015174, P50MH062185)
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK052431)
  • National Center for Research Resources (P51RR000169, RR 000169, RR019970, S10RR016924, R24RR019970)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neurotransmitter Receptor Influence on Behavior
  • Life Sciences › Neuroscience › Behavioral Neuroscience › Stress Responses and Cortisol
Keywords
serotonin transporter, DNA methylation, early life stress, gene-environment interaction, 5-HTTLPR, mood disorders, rhesus monkeys, CpG islands, peripheral blood mononuclear cells, infant development
MeSH terms
Animals, Animals, Newborn, Behavior, Animal, Female, Gene Expression Regulation, Genotype, Humans, Macaca mulatta, Maternal Deprivation, Polymorphism, Genetic, Promoter Regions, Genetic, Serotonin, Social Behavior, Social Environment, Stress, Psychological, Serotonin Plasma Membrane Transport Proteins

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