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Related Experiment Videos

Endocannabinoids, feeding and suckling--from our perspective.

R Mechoulam1, E M Berry, Y Avraham

  • 1Department of Medicinal Chemistry and Natural Products, Pharmacy School, Medical Faculty, Hebrew University, Jerusalem, Israel. mechou@cc.huji.ac.il

International Journal of Obesity (2005)
|March 30, 2006
PubMed
Summary

The endocannabinoid system influences appetite and infant feeding behaviors. Anandamide boosts appetite, while 2-arachidonoyl glycerol (2-AG) levels change with food deprivation, and CB1 receptor blockade impacts suckling.

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Area of Science:

  • Neuroscience
  • Endocrinology
  • Physiology

Background:

  • The endocannabinoid system plays a role in regulating feeding behaviors.
  • Key endocannabinoids include anandamide and 2-arachidonoyl glycerol (2-AG).

Purpose of the Study:

  • To investigate the effects of the endocannabinoid system on appetite and suckling behaviors in mice.
  • To examine the impact of food deprivation on 2-AG levels in the brain.

Main Methods:

  • Administration of anandamide to assess appetite.
  • Induction of partial or full food deprivation for 24 hours and longer periods.
  • Measurement of 2-arachidonoyl glycerol (2-AG) levels in mouse brain.
  • Administration of a CB1 antagonist at different postnatal ages to evaluate suckling behavior.

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Main Results:

  • Anandamide was found to enhance appetite in mice.
  • Short-term food deprivation initially elevated brain 2-AG levels, while prolonged deprivation reduced them.
  • Blocking the endocannabinoid system with a CB1 antagonist inhibited suckling when administered on the first day after birth; later administration also affected suckling but did not completely block it.

Conclusions:

  • The endocannabinoid system significantly influences appetite and suckling.
  • Anandamide promotes feeding, while 2-AG levels are dynamically regulated by nutritional status.
  • CB1 receptor activity is crucial for normal suckling behavior, particularly during early development.