Evidence map›Paper›PMID 27418682›Full record

Trial reportAmerican journal of physiology. Gastrointestinal and liver physiology2016

Effect of nitrate supplementation on hepatic blood flow and glucose homeostasis: a double-blind, placebo-controlled, randomized control trial.

Anthony I Shepherd, Daryl P Wilkerson, Jon Fulford, Paul G Winyard, Nigel Benjamin, Angela C Shore, Mark Gilchrist

Open access · bronzeAbstract readRandomized Controlled Trial
In one paragraph

Trial report in American journal of physiology. Gastrointestinal and liver physiology, 2016. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers, 2 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed, 2 pooled it
3.1field-weighted citation impact, top 9% 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

15 citing papers in PubMed, 2 syntheses or guidelines pooled it, 31 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Trial
  4. Trial
  5. Trial
  6. Trial
  7. Trial
  8. Article
  9. Article
  10. Review
  11. Article
  12. Review
  13. Functional properties of beetroot (Nutrition & metabolism · 2020
    Review
  14. Article
  15. Nitrite and nitrate chemical biology and signalling.British journal of pharmacology · 2019
    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

7 authors at 1 institution in 1 country.

Anthony I ShepherdCollege of Life and Environmental Sciences, Sport and Health Sciences, University of Exeter, Devon, United Kingdom; University of Exeter Medical School and NIHR Exeter Clinical Research Facility, Royal Devon and Exeter Hospital, Exeter, Devon, United Kingdom; Department of Sport and Exercise Science, Portsmouth, United Kingdom ant.shepherd@port.ac.uk.ORCID 0000-0001-6392-7944
Daryl P WilkersonCollege of Life and Environmental Sciences, Sport and Health Sciences, University of Exeter, Devon, United Kingdom;
Jon FulfordUniversity of Exeter Medical School and NIHR Exeter Clinical Research Facility, Royal Devon and Exeter Hospital, Exeter, Devon, United Kingdom;
Paul G WinyardUniversity of Exeter Medical School and NIHR Exeter Clinical Research Facility, Royal Devon and Exeter Hospital, Exeter, Devon, United Kingdom;
Nigel BenjaminUniversity of Exeter Medical School and NIHR Exeter Clinical Research Facility, Royal Devon and Exeter Hospital, Exeter, Devon, United Kingdom; Torbay Hospital, Heart and Lung Unit, Torquay, Devon, United Kingdom; and.
Angela C ShoreUniversity of Exeter Medical School and NIHR Exeter Clinical Research Facility, Royal Devon and Exeter Hospital, Exeter, Devon, United Kingdom;
Mark GilchristUniversity of Exeter Medical School and NIHR Exeter Clinical Research Facility, Royal Devon and Exeter Hospital, Exeter, Devon, United Kingdom;ORCID 0000-0002-0284-6048
University of Exeter · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Nitric oxide alters gastric blood flow, improves vascular function, and mediates glucose uptake within the intestines and skeletal muscle. Dietary nitrate, acting as a source of nitric oxide, appears to be a potential low-cost therapy that may help maintain glucose homeostasis. In a randomized, double-blind, placebo-controlled crossover study, 31 young and older adult participants had a standardized breakfast, supplemented with either nitrate-rich beetroot juice (11.91 mmol nitrate) or nitrate-depleted beetroot juice as placebo (0.01 mmol nitrate). MRI was used to assess apparent diffusion coefficient (ADC), portal vein flux, and velocity. Plasma glucose, incretin, and C-peptide concentrations and blood pressure were assessed. Outcome variables were measured at baseline and hourly for 3 h. Compared with a placebo, beetroot juice resulted in a significant elevation in plasma nitrate and plasma nitrite concentration. No differences were seen for the young or older adult cohorts between placebo and beetroot juice for ADC, or portal vein flux. There was an interaction effect in the young adults between visits for portal vein velocity. Nitrate supplementation did not reduce plasma glucose, active GLP-1, total GLP-1, or plasma C-peptide concentrations for the young or older adult cohorts. Despite a significant elevation in plasma nitrite concentration following an acute dose of (11.91 mmol) nitrate, there was no effect on hepatic blood flow, plasma glucose, C-peptide, or incretin concentration in healthy adults.

Indexed as

AdultAgedBlood Flow VelocityBlood GlucoseDouble-Blind MethodFemaleHumansLiverMaleMiddle AgedNitratesNitric OxidePortal VeinYoung AdultBlood GlucoseNitratesNitric OxideC-peptideglucoseincretinnitratenitric oxide

Identifiers

PMID27418682
PMCPMC5076007
OpenAlexW2465859700

What OpenQuestion holds

Textmetadata
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.