Evidence map›Paper›PMID 33446759›Full record

Trial reportScientific reports2021

Vasoactive intestinal polypeptide plasma levels associated with affective symptoms and brain structure and function in healthy females.

Rozalyn A Simon, Nawroz Barazanji, Michael P Jones, Olga Bednarska, Adriane Icenhour, Maria Engström, J Paul Hamilton, Åsa V Keita, Susanna Walter

Open access · goldAbstract readClinical Trial
In one paragraph

Trial report in Scientific reports, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.

0numbers the graph read from it
0cells of the map it votes in
6citing papers in PubMed
0.8field-weighted citation impact, top 34% 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

6 citing papers in PubMed, 10 citations in OpenAlex.

  1. Article
  2. Article
  3. Neuropeptidergic systems in psychiatric disorders.Frontiers in endocrinology · 2025
    Review
  4. Article
  5. Review
  6. Article
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

9 authors at 3 institutions in 3 countries.

Rozalyn A SimonCenter for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden.
Nawroz BarazanjiDivision of Inflammation and Infection, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.
Michael P JonesDepartment of Psychology, Macquarie University, Sydney, Australia.
Olga BednarskaDivision of Inflammation and Infection, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.
Adriane IcenhourCenter for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden.
Maria EngströmCenter for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden.
J Paul HamiltonDepartment of Biomedical and Clinical Sciences, Center for Social and Affective Neuroscience, Linköping University, Linköping, Sweden.
Åsa V KeitaDivision of Surgery, Orthopedics and Oncology, Department of Biomedical and Clinical Sciences, Linköping University, Linköping, Sweden.
Susanna WalterCenter for Medical Image Science and Visualization (CMIV), Linköping University, Linköping, Sweden. susanna.walter@liu.se.
Linköping University · SEMacquarie University · AUUniversity of Duisburg-Essen · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Vasoactive intestinal polypeptide (VIP) is a neuroendocrine peptide distributed throughout the human body, including the CNS, where it is particularly abundant in brain regions associated with anxiety and depression. Based on earlier studies indicating that peripheral VIP may cross through the blood-brain barrier, we hypothesized plasma VIP levels to be associated with symptoms of anxiety and depression, as well as brain volume and resting-state functional connectivity in the amygdala, hippocampus, parahippocampus, and orbitofrontal cortex. Plasma VIP concentrations and anxiety/depression symptoms were measured in 37 healthy females. Functional and structural magnetic resonance imaging were used to evaluate functional connectivity and brain volume respectively, and their associations with VIP concentrations within brain regions associated with anxiety and depression. Negative correlations were found between VIP levels and symptoms of anxiety (r = - 0.44, p = 0.002) and depression (r = - 0.50, p = 0.001). Functional connectivity demonstrated significant VIP-dependent positive associations between the amygdala seed region with both the right parahippocampus (t

Indexed as

AnxietyBrainDepressionMagnetic Resonance ImagingAdultFemaleHumansMiddle AgedVasoactive Intestinal PeptideVasoactive Intestinal Peptide

Identifiers

PMID33446759
PMCPMC7809454
OpenAlexW3125345699

What OpenQuestion holds

Textmetadata
LicenceCC BY
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.