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Related Experiment Videos

Systemic stress increases serum leptin level.

Noriaki Konishi1, Michiro Otaka, Masaru Odashima

  • 1Department of Internal Medicine, Akita University School of Medicine, Akita, Japan.

Journal of Gastroenterology and Hepatology
|July 11, 2006
PubMed
Summary
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Water-immersion stress significantly impacts leptin levels. Serum leptin increased, while gastric leptin decreased, suggesting stress influences eating behavior regulation through leptin.

Area of Science:

  • Endocrinology
  • Neuroscience
  • Physiology

Background:

  • Leptin, a peptide hormone primarily from adipocytes, regulates body weight and food intake.
  • Emerging evidence suggests the gastric mucosa also produces leptin, potentially influencing serum levels.
  • The relationship between stress, leptin, and eating behavior requires further investigation.

Purpose of the Study:

  • To examine the impact of acute water-immersion stress on serum, gastric, and adipose tissue leptin levels in rats.
  • To elucidate the role of stress in modulating leptin production and secretion.
  • To understand the potential link between stress-induced leptin changes and eating behavior regulation.

Main Methods:

  • Male Sprague-Dawley rats were subjected to water-immersion stress.

Related Experiment Videos

  • Leptin concentrations in serum, gastric mucosa, and adipose tissue were quantified using the ELISA system.
  • Measurements were taken at various time points before and after stress initiation.

    • Main Results:

    • Water-immersion stress led to a significant increase in serum leptin levels, peaking at 9 hours.
    • Gastric leptin levels showed a significant decrease at 6 and 9 hours post-stress.
    • Adipose tissue leptin levels significantly increased 3 hours after the initiation of stress.

    Conclusions:

    • Stress significantly alters leptin levels across different tissues.
    • Stress may stimulate gastric leptin secretion and adipose tissue leptin production.
    • These findings suggest stress-related events play a role in regulating leptin and potentially eating behavior.