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Related Experiment Video

Updated: Jul 13, 2026

Experimental Approach to Examine Leptin Signaling in the Carotid Bodies and its Effects on Control of Breathing
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Experimental Approach to Examine Leptin Signaling in the Carotid Bodies and its Effects on Control of Breathing

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Leptin responsiveness in chronically decerebrate rats.

Ruth B S Harris1, Timothy J Bartness, Harvey J Grill

  • 1Department of Foods and Nutrition, Dawson Hall, University of Georgia, Athens, GA 30602, USA. Harrisrb@uga.edu

Endocrinology
|July 7, 2007
PubMed
Summary

Leptin

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Area of Science:

  • Physiology
  • Endocrinology
  • Metabolism

Background:

  • Leptin's role in regulating body fat is complex.
  • It's unclear if leptin acts peripherally or centrally to reduce fat mass.

Purpose of the Study:

  • To investigate leptin's effects on body fat in decerebrate rats.
  • To determine if leptin's actions are independent of food intake and energy expenditure.

Main Methods:

  • Peripheral leptin infusions in chronically decerebrate (CD) rats and intact controls.
  • Rats were tube-fed varying amounts to control for energy status.
  • Body composition, energy expenditure, and hormone levels were measured.

Main Results:

  • Leptin altered body fat independently of food intake or energy expenditure.
  • The forebrain appears to modulate leptin's effects on energy expenditure.
  • Leptin's response varied based on the animal's energy status.

Conclusions:

  • Leptin can directly influence body fat stores.
  • Central mechanisms involving the forebrain regulate leptin's impact on energy expenditure.
  • An animal's energy status is a key determinant of its leptin response.

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