Cited by 34Epigenetics and DNA MethylationGenomics and Chromatin DynamicsGenetics, Aging, and Longevity in Model Organisms

Hypermethylation of BDNF and SST Genes in the Orbital Frontal Cortex of Older Individuals: A Putative Mechanism for Declining Gene Expression with Age

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McKinney, Brandon C, Lin, Chien-Wei, Oh, Hyunjung, Tseng, George C, Lewis, David A, Sibille, Etienne·2015·Neuropsychopharmacology

Abstract

Expression of brain-derived neurotrophic factor (BDNF) and somatostatin (SST) mRNAs in the brain decreases progressively and robustly with age, and lower BDNF and SST expression in the brain has been observed in many brain disorders. BDNF is known to regulate SST expression; however, the mechanisms underlying decreased expression of both genes are not understood. DNA methylation (DNAm) is an attractive candidate mechanism. To investigate the contribution of DNAm to the age-related decline in BDNF and SST expression, the Illumina Infinium HumanMethylation450 Beadchip Array was used to quantify DNAm of BDNF (26 CpG loci) and SST (9 CpG loci) in the orbital frontal cortices of postmortem brains from 22 younger (age <42 years) and 22 older individuals (age >60 years) with known age-dependent BDNF and SST expression differences. Relative to the younger individuals, 10 of the 26 CpG loci in BDNF and 8 of the 9 CpG loci in SST were significantly hypermethylated in the older individuals. DNAm in BDNF exons/promoters I, II, and IV negatively correlated with BDNF expression (r=-0.37, p<0.05; r=-0.40, p<0.05; r=-0.24, p=0.07), and DNAm in SST 5' UTR and first exon/intron negatively correlated with SST expression (r=-0.48, p<0.01; r=-0.63, p<0.001), respectively. An expanded set of BDNF- and GABA-related genes exhibited similar age-related changes in DNAm and correlation with gene expression. These results suggest that DNAm may be a proximal mechanism for decreased expression of BDNF, SST, and other BDNF- and GABA-related genes with brain aging and, by extension, for brain disorders in which their expression is decreased.

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Authors
McKinney, B. C., Lin, C.-W., Oh, H., Tseng, G. C., Lewis, D. A., & Sibille, E.
Affiliations
  • University of Pittsburgh (US)
  • Centre for Addiction and Mental Health (CA)
Corresponding author
Sibille, Etienne
Venue
Neuropsychopharmacology
Published
2015-04-16
Volume
40
Issue
11
Pages
2604-2613
ISSN
  • 0893-133X (ISSN-L)
  • 1740-634X
OpenAlex
W2009590968
Cited by
34
References
38
Citations by year
2026: 1 · 2025: 5 · 2024: 1 · 2022: 1 · 2021: 3 · 2020: 3 · 2019: 5 · 2018: 5 · 2017: 5 · 2016: 3 · 2015: 1
FWCI
2.03
Type
journal article
Language
en
Open access
Locations
  • Neuropsychopharmacology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Bristol-Myers Squibb
  • Pfizer
  • University of Pittsburgh
  • Sunovion
  • Concert Pharmaceuticals
  • National Institute of Mental Health (R01MH093723, R01MH077159, K02MH084060, T32MH016804)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Epigenetics and DNA Methylation
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Genomics and Chromatin Dynamics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Aging › Genetics, Aging, and Longevity in Model Organisms
Keywords
DNA methylation, brain-derived neurotrophic factor, somatostatin, brain aging, orbitofrontal cortex, CpG sites, postmortem brain
MeSH terms
Adult, Aged, Aging, Brain, Female, Humans, Male, Middle Aged, RNA, Messenger, Somatostatin, Cohort Studies, Gene Expression, Prefrontal Cortex, DNA Methylation, Brain-Derived Neurotrophic Factor, Gene Expression Profiling

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