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Related Experiment Videos

Magnesium-induced conditioned place preference in mice.

S I Lawley1, K M Kantak

  • 1Department of Psychology, Boston University, MA 02115.

Pharmacology, Biochemistry, and Behavior
|July 1, 1990
PubMed
Summary
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Magnesium chloride (MgCl2) shows reinforcing properties in mice, with 15 mg/kg inducing the strongest conditioned place preference. Other drugs like amphetamine and cocaine interact with this effect, suggesting shared properties with stimulants.

Area of Science:

  • Neuroscience
  • Pharmacology
  • Behavioral Science

Background:

  • The reinforcing properties of substances are crucial for understanding addiction.
  • Magnesium's potential role in reward pathways is not fully understood.

Purpose of the Study:

  • To investigate the reinforcing properties of magnesium chloride (MgCl2) in a mouse model.
  • To examine how other drugs interact with MgCl2-induced conditioned place preference.

Main Methods:

  • A conditioned place preference (CPP) paradigm was employed using a three-compartment shuttle box.
  • Mice received alternating injections of MgCl2 and saline, with varying doses (0-125 mg/kg) and trial numbers (8 or 16).
  • Post-conditioning, mice were challenged with drugs like cocaine, amphetamine, pentobarbital, and haloperidol to assess effects on CPP.

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Main Results:

  • 15 mg/kg MgCl2 produced the most significant conditioned place preference.
  • Increasing conditioning trials decreased the overall conditioning effect.
  • Amphetamine potentiated MgCl2-induced CPP, while cocaine and pentobarbital maintained it, and haloperidol blocked it.

Conclusions:

  • Magnesium chloride exhibits primary reinforcing properties in mice.
  • MgCl2 shares stimulus characteristics with other reinforcing substances and stimulants, indicating potential interactions within reward circuitry.