Amphetamine induction of c-fos in the nucleus accumbens is not inhibited by glutamate antagonists

Brain Research
A Dalia, L J Wallace

Abstract

Systemic administration of relatively high doses of amphetamine or cocaine induces expression of c-fos in the rat striatum and nucleus accumbens. The doses of drugs used in such experiments are substantially higher than those needed to produce reward or sensitization. Therefore, it was determined if low doses of amphetamine capable of eliciting reward and sensitization increase levels of c-Fos protein in the nucleus accumbens. Amphetamine, 1 mg/kg, stimulated locomotor activity and increased the number of nucleus accumbens cells immunohistochemically positive for c-Fos protein to approximately 800 cells per section from a control of approximately 100 cells per section. Since glutamate antagonists modify various responses to amphetamine, it was then determined whether activation of glutamate receptors is involved in the induction of c-Fos protein by low doses of amphetamine. The NMDA receptor antagonist MK-801 by itself stimulated locomotor activity but did not alter baseline levels of c-Fos protein. When given before amphetamine, both locomotor activity and extent of c-fos induction were greater than from amphetamine alone. The AMPA receptor antagonist NBQX by itself had no effect on locomotor activity but increased slightly th...Continue Reading

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Citations

Jun 17, 1998·Molecular Neurobiology·R E Harlan, M M Garcia
Aug 27, 2005·Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology·Pia Bäckström, Petri Hyytiä
Jan 11, 2008·Neuropsychopharmacology : Official Publication of the American College of Neuropsychopharmacology·Amy J RamseyMarc G Caron
Jun 10, 2008·European Neuropsychopharmacology : the Journal of the European College of Neuropsychopharmacology·Arturo R ZavalaJanet L Neisewander
Nov 1, 2007·The European Journal of Neuroscience·David J RademacherGloria E Meredith
Aug 21, 2007·Biochemical Pharmacology·Justin T Gass, M Foster Olive

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