Cited by 51Regulation of Appetite and ObesityAdipokines, Inflammation, and Metabolic DiseasesHypothalamic control of reproductive hormones

Endurance exercise is a leptin signaling mimetic in hypothalamus of Wistar rats

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Zhao, Jiexiu, Tian, Ye, Xu, Jincheng, Liu, Dongsen, Wang, Xiaofang, Zhao, Binxiu·2011·Lipids in Health and Disease

Abstract

BACKGROUND: Endurance exercise is known to promote a substantial effect on the energy balance in rats and humans. However, little is known about the exact mechanisms for the appetite-suppressive effects of endurance exercise. We hypothesized that endurance training might activate signaling cascades in the hypothalamus known to be involved in leptin signaling. METHODS: 16 male Wistar rats were randomly assigned to two groups: sedentary (n = 8) and exercise groups (n = 8). Animals in the exercise group started treadmill running at 30 m/min, 0% grade, for 1 min/bout. Running time was gradually increased by 2 min/bout every day. The training plan was one bout per day during initial two weeks, and two bouts per day during 3rd-9th week. At the end of nine-week experiment, blood was analyzed for low-density lipoprotein cholesterol (LDL-C), triglyceride (TG), total cholesterol (TC), free fatty acid (FFA), interleukin (IL)-6, and leptin in both groups. Activations of janus kinase 2-signaling transducer and activator of transcription 3 (JAK2-STAT3), protein kinase B (Akt), extracellular regulated kninase (ERKs), and suppressor of cytokine signaling 3 (SOCS3) in hypothalamus were measured in the end of nine weeks of exercise protocol. RESULTS: Nine-week endurance exercise induced lower concentrations of LDL-C, TG, TC, FFA, and leptin in rats (P < 0.05 or P < 0.01). Nine-week endurance exercise significantly increased the circulating IL-6 concentration compared with sedentary group (239.6 ± 37.2 pg/ml vs. 151.8 ± 31.5 pg/ml, P < 0.01). Exercise rats showed significant increases in JAK2, STAT3, Akt, ERKs, and SOCS3 phosphorylations compared with sedentary rats (P < 0.01). CONCLUSION: The data suggest that endurance exercise is a leptin signaling mimetic in hypothalamus of Wistar rats.

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Authors
Zhao, J., Tian, Y., Xu, J., Liu, D., Wang, X., & Zhao, B.
Affiliations
  • China Institute of Sport Science (CN)
  • Beijing Sport University (CN)
  • Texas A&M University System (US)
  • First Hospital of Shijiazhuang (CN)
Corresponding author
Tian, Ye
Venue
Lipids in Health and Disease
Published
2011-12
Volume
10
Issue
1
Pages
225-225
ISSN
1476-511X (ISSN-L)
OpenAlex
W2107797697
Cited by
51
References
57
Citations by year
2025: 6 · 2024: 1 · 2023: 5 · 2022: 5 · 2020: 1 · 2018: 5 · 2017: 5 · 2016: 4 · 2015: 3 · 2014: 6 · 2013: 9
FWCI
2.36
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Lipids in Health and Disease (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • OakTrust (Texas A&M University Libraries) (submittedVersion)
Funders
National Natural Science Foundation of China (30270642)
Topics
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
  • Health Sciences › Medicine › Epidemiology › Adipokines, Inflammation, and Metabolic Diseases
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
Keywords
endurance exercise, leptin signaling, hypothalamus, appetite suppression, energy balance, JAK2/STAT3 signaling, Akt signaling, ERK signaling, SOCS3, interleukin-6, lipid metabolism, Wistar rats
MeSH terms
Suppressor of Cytokine Signaling 3 Protein, Animals, Fatty Acids, Nonesterified, Hypothalamus, Cholesterol, LDL, Male, Phosphorylation, Physical Conditioning, Animal, Random Allocation, Triglycerides, Signal Transduction, Rats, Wistar, Leptin, Extracellular Signal-Regulated MAP Kinases, Lipid Metabolism, STAT3 Transcription Factor, Suppressor of Cytokine Signaling Proteins, Proto-Oncogene Proteins c-akt, Rats, Janus Kinase 2

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