Cited by 49Circadian rhythm and melatoninCardiac Ischemia and ReperfusionCardiac Fibrosis and Remodeling

Short‐term melatonin consumption protects the heart of obese rats independent of body weight change and visceral adiposity

Nduhirabandi, Frederic, Huisamen, Barbara, Strijdom, Hans, Blackhurst, Dee, Lochner, Amanda·2014·Journal of Pineal Research

Abstract

Chronic melatonin treatment has been shown to prevent the harmful effects of diet‐induced obesity and reduce myocardial susceptibility to ischaemia‐reperfusion injury (IRI). However, the exact mechanism whereby it exerts its beneficial actions on the heart in obesity/insulin resistance remains unknown. Herein, we investigated the effects of relatively short‐term melatonin treatment on the heart in a rat model of diet‐induced obesity. Control and diet‐induced obese Wistar rats (fed a high calorie diet for 20 wk) were each subdivided into three groups receiving drinking water with or without melatonin (4 mg/kg/day) for the last 6 or 3 wk of experimentation. A number of isolated hearts were perfused in the working mode, subjected to regional or global ischaemia‐reperfusion; others were nonperfused. Metabolic parameters, myocardial infarct sizes (IFS), baseline and postischaemic activation of PKB/Akt, ERK42/44, GSK‐3β and STAT‐3 were determined. Diet‐induced obesity caused increases in body weight gain, visceral adiposity, fasting blood glucose, serum insulin and triglyceride (TG) levels with a concomitant cardiac hypertrophy, large postischaemic myocardial IFS s and a reduced cardiac output. Melatonin treatment (3 and 6 wk) decreased serum insulin levels and the HOMA index (P < 0.05) with no effect on weight gain (after 3 wk), visceral adiposity, serum TG and glucose levels. It increased serum adiponectin levels, reduced myocardial IFSs in both groups and activated baseline myocardial STAT‐3 and PKB/Akt, ERK42/44 and GSK‐3β during reperfusion. Overall, short‐term melatonin administration to obese/insulin resistant rats reduced insulin resistance and protected the heart against ex vivo myocardial IRI independently of body weight change and visceral adiposity.

Integrity signals

Registry

Crossref · 10.1111/jpi.12171

Cites

71 of 71 references verified0 citation errors · 0 not checkable

Statistics

Recomputing p-values needs the paper’s full text.

Claims the paper makes

This paper’s full text isn’t openly available, so its claims and self-check weren’t run. The registry and citation checks still apply.

Claims other papers make about this one

Each is checked against this paper’s own text: does it say what the citing paper says it does?

Cites

Flagged first, then by citations

Cited by

Sorted by citations

Authors
Nduhirabandi, F., Huisamen, B., Strijdom, H., Blackhurst, D., & Lochner, A.
Affiliations
  • Stellenbosch University (ZA)
  • University of Cape Town (ZA)
Corresponding author
Nduhirabandi, Frederic
Venue
Journal of Pineal Research
Publisher
Wiley
Published
2014-09-20
Volume
57
Issue
3
Pages
317-332
ISSN
  • 0742-3098 (ISSN-L)
  • 1600-079X
OpenAlex
W2028739777
Cited by
48
References
71
Citations by year
2026: 1 · 2024: 2 · 2023: 3 · 2022: 2 · 2021: 4 · 2020: 5 · 2019: 6 · 2018: 7 · 2017: 7 · 2016: 6 · 2015: 5
FWCI
2.92
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Pineal Research (publishedVersion)
  • PubMed (publishedVersion)
Funders
South African National Research Fundation and Harry Crossley Foundation
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Medicine › Pathology and Forensic Medicine › Cardiac Ischemia and Reperfusion
  • Health Sciences › Medicine › Cardiology and Cardiovascular Medicine › Cardiac Fibrosis and Remodeling
Keywords
melatonin, diet-induced obesity, insulin resistance, myocardial ischemia-reperfusion injury, cardioprotection, visceral fat, adiponectin, STAT3 signaling, Akt signaling, GSK3β, myocardial infarct size, cardiac hypertrophy, HOMA index
MeSH terms
Animals, Body Weight, Heart, Melatonin, Obesity, Intra-Abdominal Fat, Rats

About these checks

Registry, retraction, Cites and statistics results are computed, not judged, with one exception: a printed reference that no index lists is read once by a model before it counts as a citation error. Claims are extracted by a model and kept only when their quote appears verbatim in the text; each cited source is then checked, with a model’s help, for whether it says what the claim relies on. Those verdicts can be wrong — read the claim’s quote and the cited source before relying on one.

Statistics and arithmetic are recomputed, not judged.

Confidence bands are shown only for fields calibrated on our annotated test set. None is calibrated yet, so no band is shown.

What counts as a claim ›How we measure confidence ›How we check this ›

Are you an author, or do you see a problem with this page? Request a review