Evidence map›Paper›PMID 25355443›Full record

ArticleAmerican journal of medical genetics. Part B, Neuropsychiatric genetics : the official publication of the International Society of Psychiatric Genetics2015

DNA extracted from saliva for methylation studies of psychiatric traits: evidence tissue specificity and relatedness to brain.

Alicia K Smith, Varun Kilaru, Torsten Klengel, Kristina B Mercer, Bekh Bradley, Karen N Conneely, Kerry J Ressler, Elisabeth B Binder

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In one paragraph

Article in American journal of medical genetics. Part B, Neuropsychiatric genetics : the official publication of the International Society of Psychiatric Genetics, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 213 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
213citing papers in PubMed, 4 pooled it
11.5field-weighted citation impact, top 1% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

213 citing papers in PubMed, 4 syntheses or guidelines pooled it, 351 citations in OpenAlex.

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  13. Investigating PeripheralBiomolecules · 2026
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153 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors at 4 institutions in 2 countries.

Alicia K SmithDepartment of Psychiatry and Behavioral Sciences, Emory University School of Medicine, Atlanta, Georgia; Genetics and Molecular Biology Program, Emory University, Atlanta, Georgia.
Varun Kilaru
Torsten Klengel
Kristina B Mercer
Bekh Bradley
Karen N Conneely
Kerry J Ressler
Elisabeth B Binder
Emory University · USAtlanta VA Medical Center · USHoward Hughes Medical Institute · USMax Planck Institute of Psychiatry · DE

Funding

Genetic and Trauma-Related Risk Factors for PTSDR01MH071537 · NIMH · EMORY UNIVERSITY · PI RESSLER, KERRY J. · 2005 to 2014
$8.5M
2 of 2 Prospective Determination of Psychobiological Risk Factors for PTSDR01MH094757 · NIMH · EMORY UNIVERSITY · PI RESSLER, KERRY J. · 2012 to 2016
$2.3M
Genetic and estrogen-dependent regulation of the human PAC1R receptor and PTSDR01MH096764 · NIMH · MCLEAN HOSPITAL · PI RESSLER, KERRY J. · 2012 to 2016
$2.1M
Mechanisms of Intergenerational Impact of Maternal TraumaR01HD071982 · NICHD · EMORY UNIVERSITY · PI BRADLEY, BEKH · 2013 to 2017
$2.1M
Genetic & Environmental Risk Factors that Contribute to Childhood PsychopathologyK01MH085806 · NIMH · EMORY UNIVERSITY · PI SMITH, ALICIA K · 2010 to 2013
$522k
Genetic and Trauma-Related Risk Factors for PTSD: From GWAS to FunctionR56MH071537 · NIMH · EMORY UNIVERSITY · PI RESSLER, KERRY J. · 2015 to 2015
$148k
European Research Council 281338Howard Hughes Medical InstituteNICHD NIH HHS HD071982NICHD NIH HHS R01 HD071982NIMH NIH HHS K01 MH085806NIMH NIH HHS MH071537NIMH NIH HHS MH085806NIMH NIH HHS MH096764NIMH NIH HHS R01 MH071537NIMH NIH HHS R01 MH094757NIMH NIH HHS R01 MH096764NIMH NIH HHS R56 MH071537
6 · The paper itself

Abstract

DNA methylation has become increasingly recognized in the etiology of psychiatric disorders. Because brain tissue is not accessible in living humans, epigenetic studies are most often conducted in blood. Saliva is often collected for genotyping studies but is rarely used to examine DNA methylation because the proportion of epithelial cells and leukocytes varies extensively between individuals. The goal of this study was to evaluate whether saliva DNA is informative for studies of psychiatric disorders. DNA methylation (HumanMethylation450 BeadChip) was assessed in saliva and blood samples from 64 adult African Americans. Analyses were conducted using linear regression adjusted for appropriate covariates, including estimated cellular proportions. DNA methylation from brain tissues (cerebellum, frontal cortex, entorhinal cortex, and superior temporal gyrus) was obtained from a publically available dataset. Saliva and blood methylation was clearly distinguishable though there was positive correlation overall. There was little correlation in CpG sites within relevant candidate genes. Correlated CpG sites were more likely to occur in areas of low CpG density (i.e., CpG shores and open seas). There was more variability in CpG sites from saliva than blood, which may reflect its heterogeneity. Finally, DNA methylation in saliva appeared more similar to patterns from each of the brain regions examined overall than methylation in blood. Thus, this study provides a framework for using DNA methylation from saliva and suggests that DNA methylation of saliva may offer distinct opportunities for epidemiological and longitudinal studies of psychiatric traits.

Indexed as

AdultBlack or African AmericanBrainCpG IslandsDNADNA MethylationFemaleHumansMaleMental DisordersSalivaDNAbiomarkerepigeneticEWASHumanMethylation450oragene

Identifiers

PMID25355443
PMCPMC4610814
OpenAlexW2010390756

What OpenQuestion holds

Textmetadata
LicenceTDM
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.