Evidence map›Paper›PMID 28803324›Full record

ArticlePsychopharmacology2017

Decreased serum L-arginine and L-citrulline levels in major depression.

S Hess, G Baker, G Gyenes, R Tsuyuki, S Newman, Jean-Michel Le Melledo

Abstract read
PubMed Publisher
In one paragraph

Article in Psychopharmacology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 30 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
30citing papers in PubMed, 1 pooled it
2.2field-weighted citation impact, top 12% 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

30 citing papers in PubMed, 1 synthesis or guideline pooled it, 53 citations in OpenAlex.

  1. Pooled it
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  15. Altered Arginine/Nitric Oxide Pathway in Children Diagnosed Attention Deficit Hyperactivity Disorder, and the Effect of 10 Weeks Methylphenidate Treatment.Clinical psychopharmacology and neuroscience : the official scientific journal of the Korean College of Neuropsychopharmacology · 2022
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  19. Post-translational Modifications in Brain Diseases: A Future for Biomarkers.Advances in experimental medicine and biology · 2022
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4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

6 authors at 2 institutions in 1 country.

S HessDepartment of Psychiatry, University of Alberta, 114th street, Edmonton, AB, T6G 2B7, Canada.
G BakerDepartment of Psychiatry, Neurochemical Research Unit, University of Alberta, 114th street, Edmonton, AB, T6G 2B7, Canada.
G GyenesDepartment of Cardiology, University of Alberta, 114th street, Edmonton, AB, T6G 2B7, Canada.
R TsuyukiDepartment of Cardiology, University of Alberta, 114th street, Edmonton, AB, T6G 2B7, Canada.
S NewmanDepartment of Psychiatry, University of Alberta, 114th street, Edmonton, AB, T6G 2B7, Canada.
Jean-Michel Le MelledoDepartment of Psychiatry, University of Alberta, 114th street, Edmonton, AB, T6G 2B7, Canada. jmlemelledo@gmail.com.
University of Alberta · CAUniversity of Alberta Hospital · CA

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

rationaleIt has been suggested that endothelial dysfunction caused by a decreased endothelial production of nitric oxide (NO) may contribute to the consistently observed increased risk of developing cardiovascular disease (CVD) in physically healthy patients suffering from major depression (MD). NO is a gas synthesized from Larginine (a conditionally essential amino acid) and oxygen by endothelial nitric oxide synthase (eNOS). The end products of NO production include both NO and L-citrulline. NO is rapidly reduced to the anions nitrite and nitrate, classically referred to as NO metabolites. Their measurement has been used as a surrogate measurement for endothelial NO production. We and others have shown decreased levels of NO metabolites in the serum of MD patients. The mechanism of this decreased production of NO by the endothelium has not yet been elucidated.

objectivesThe purpose of this study is to assess serum levels of L-arginine and L-citrulline in patients with MD.

methodsLevels of L-arginine and L-citrulline were measured in 35 unmedicated physically healthy MD patients and 36 healthy controls (HCs).

resultsL-arginine and L-citrulline concentrations were significantly lower in MD patients than in healthy controls (L-arginine, 73.54 + 21.53 μmol/L and 84.89 + 25.16, p = 0.04 μmol/L and L-citrulline 31.58 + 6.05 μmol/L and 35.19 + 6.85 μmol/L, p = 0.03, respectively).

conclusionsThe decrease in L-arginine levels in MD patients is a possible explanation for the decrease in NO metabolites in MD patients and therefore may contribute, through endothelial dysfunction, to the increased CV risk associated with MD.

Indexed as

AdolescentAdultArginineCardiovascular DiseasesCitrullineFemaleHumansMajor Depressive DisorderMaleNitric Oxide SynthaseNitric Oxide Synthase Type IIIReference ValuesRisk FactorsYoung AdultArginineCitrullineNitric Oxide SynthaseNitric Oxide Synthase Type IIINOS3 protein, humanCardiovascular riskL-arginineL-citrullineMajor depressionNitric oxide

Identifiers

PMID28803324
OpenAlexW2744004885

What OpenQuestion holds

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Read underepoch 390

Registered trials

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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.