Evidence map›Paper›PMID 31898050›Full record

ArticleObesity surgery2020

Effects and Mechanisms of Vagal Nerve Stimulation on Body Weight in Diet-Induced Obese Rats.

Fei Dai, Jieyun Yin, Jiande D Z Chen

Abstract read
PubMed Publisher
In one paragraph

Article in Obesity surgery, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed, 1 pooled it
1.1field-weighted citation impact, top 22% 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

20 citing papers in PubMed, 1 synthesis or guideline pooled it, 25 citations in OpenAlex.

  1. Pooled it
  2. Hypertension: a missing piece in HFpEF?Hypertension research : official journal of the Japanese Society of Hypertension · 2026
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  14. 2023 update and perspectives.Hypertension research : official journal of the Japanese Society of Hypertension · 2024
    Review
  15. Article
  16. Review
  17. Article
  18. Clinical perspectives on vagus nerve stimulation: present and future.Clinical science (London, England : 1979) · 2022
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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

3 authors at 2 institutions in 2 countries.

Fei DaiDivision of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, 710004, China.
Jieyun YinVeterans Research and Education Foundation, Veterans Affairs Medical Center, Oklahoma City, OK, 73104, USA.
Jiande D Z ChenVeterans Research and Education Foundation, Veterans Affairs Medical Center, Oklahoma City, OK, 73104, USA. jchen184@jhmi.edu.ORCID http://orcid.org/0000-0002-0191-5697
Veterans Health Administration · USJohns Hopkins University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

backgroundVagal nerve stimulation (VNS) has recently been indicated as a novel method for treating obesity. However, the optimal stimulation parameters were unknown and mechanisms were poorly understood. The aim of this study was to investigate the effects of VNS on food intake and body weight in diet-induced obesity (DIO) rats and its possible mechanism involving autonomic functions and gut hormones.

methodsTen control rats and 16 DIO rats were chronically implanted with one pair of electrodes in the subdiaphragmatic vagal nerve. VNS with different stimulation parameters and sham-VNS were performed in control rats. In a chronic study, 8 DIO rats were applied with VNS and another 8 DIO rats were treated with sham-VNS for 4 weeks. Food intake, body weight, gastric emptying, heart rate variability (HRV), and gut hormones were evaluated.

resultsIn DIO rats, the food intake (p < 0.001) and body weight (p < 0.001) were significantly decreased in the VNS group, compared with the sham-VNS group. VNS decreased the sympathovagal ratio (p = 0.003) and increased vagal activity (p = 0.032) assessed from the spectral analysis of HRV. It also increased plasma levels of glucagon-like peptide-1 (p = 0.012), polypeptide YY (p = 0.008), and pancreatic polypeptide (p = 0.008) in DIO rats. Physiologically, VNS delayed solid gastric emptying (p < 0.001) and increased gastric volume (p = 0.004).

conclusionVNS with appropriate parameters reduced food intake and body weight by delaying gastric emptying mediated via the enhancement of vagal activity and release of anorexigenic hormones.

Indexed as

Body WeightVagus Nerve StimulationAnimalsDiet, High-FatEatingGastric EmptyingGastrointestinal HormonesGlucagon-Like Peptide 1MaleObesityRatsRats, Sprague-DawleyVagus NerveGastrointestinal HormonesGlucagon-Like Peptide 1Autonomic functionsDiet-induced obesityGastric emptyingGut hormonesVagal nerve stimulation

Identifiers

PMID31898050
OpenAlexW2998525054

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.