Evidence map›Paper›PMID 27716956›Full record

ArticleAlcoholism, clinical and experimental research2016

FAAH Gene Variation Moderates Stress Response and Symptom Severity in Patients with Posttraumatic Stress Disorder and Comorbid Alcohol Dependence.

Primavera A Spagnolo, Vijay A Ramchandani, Melanie L Schwandt, Laura E Kwako, David T George, Leah M Mayo, Cecilia J Hillard, Markus Heilig

Open access · greenAbstract read
In one paragraph

Article in Alcoholism, clinical and experimental research, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 54 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
54citing papers in PubMed, 2 pooled it
8.6field-weighted citation impact, top 2% 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

54 citing papers in PubMed, 2 syntheses or guidelines pooled it, 103 citations in OpenAlex.

  1. Pooled it
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  8. Observational
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  13. Understanding the Role of Endocannabinoids in Posttraumatic Stress Disorder.International journal of molecular sciences · 2025
    Review
  14. Article
  15. Article
  16. Article
  17. Article
  18. Biomarkers of stress resilience: A review.Neuroscience applied · 2024
    Article
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  20. Review
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 3 institutions in 2 countries.

Primavera A SpagnoloOffice of the Clinical Director, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, Maryland.
Vijay A RamchandaniSection on Human Psychopharmacology, Division of Intramural Clinical and Biomedical Research, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, Maryland.
Melanie L SchwandtOffice of the Clinical Director, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, Maryland.
Laura E KwakoOffice of the Clinical Director, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, Maryland.
David T GeorgeOffice of the Clinical Director, National Institute on Alcohol Abuse and Alcoholism, NIH, Bethesda, Maryland.
Leah M MayoCenter for Social and Affective Neuroscience, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden.
Cecilia J HillardDepartment of Pharmacology and Toxicology, Neuroscience Research Center, Medical College of Wisconsin, Milwaukee, Wisconsin.
Markus HeiligCenter for Social and Affective Neuroscience, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden. markus.heilig@liu.se.
National Institute on Alcohol Abuse and Alcoholism · USLinköping University · SEMedical College of Wisconsin · US

Funding

NIAAA Repository/Screening Database Management and ResearchZIAAA000130 · NIAAA · NATIONAL INSTITUTE ON ALCOHOL ABUSE AND ALCOHOLISM · PI SCHWANDT, MELANIE · 2017 to 2025
$60.1M
Alcohol Pharmacokinetics and Pharmacodynamics in HumansZIAAA000466 · NIAAA · NATIONAL INSTITUTE ON ALCOHOL ABUSE AND ALCOHOLISM · PI RAMCHANDANI, VIJAY ARJUN · 2009 to 2025
$31.2M
Intramural NIH HHS ZIA AA000466
6 · The paper itself

Abstract

backgroundA common single nucleotide polymorphism (C385A) in the human fatty acid amide hydrolase (FAAH) gene has been associated with decreased distress responses in healthy volunteers, but its role in psychiatric disorders remains unknown. Here, we obtained genotypes and carried out a secondary analysis of subjects from a trial of comorbid posttraumatic stress disorder (PTSD) and alcohol dependence (AD). We evaluated the effects of C385A variation on behavioral and biochemical biomarkers of distress responses.

methodsForty-nine patients with PTSD and AD were admitted for 4 weeks to an experimental medicine unit at the National Institutes of Health Clinical Center. Following detoxification, stress reactivity and peripheral endocannabinoid (eCB) levels were assessed in response to a challenge session using personalized auditory guided imagery. Over the course of the study, subjects were also evaluated for changes in PTSD symptom severity.

resultsFAAH C385A allele carriers showed a marked increase in serum anandamide levels at baseline and throughout the stress challenge procedure compared with C allele homozygotes, while levels of eCBs primarily metabolized through other enzymatic activity, such as 2-arachidonoylglycerol, did not differ between genotype groups. FAAH C385A carriers also had decreased subjective anxiety responses to the stress challenge. Similar effects of FAAH C385A genotype were found at the level of clinical PTSD symptom severity, in particular in the arousal domain.

conclusionsThis is to our knowledge the first study showing that FAAH C385A variation modulates stress responses in subjects with disorders characterized by increased stress reactivity. These findings point to the eCB pathway as a promising target for future antistress therapeutics.

Indexed as

AdultAlcoholismAmidohydrolasesAnxietyEndocannabinoidsFatty Acid Amide HydrolasesFemaleHumansMaleMiddle AgedPolymorphism, Single NucleotideStress Disorders, Post-TraumaticStress, PsychologicalAmidohydrolasesEndocannabinoidsFatty Acid Amide HydrolasesAlcohol Use DisordersEndocannabinoidsFatty Acid Amide HydrolasePost-traumatic Stress DisorderStress

Identifiers

PMID27716956
PMCPMC5748341
OpenAlexW2526667480

What OpenQuestion holds

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LicenceTDM
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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.