Repeated administration of MK-801 produces sensitization to its own locomotor stimulant effects but blocks sensitization to amphetamine - PubMed (original) (raw)

Repeated administration of MK-801 produces sensitization to its own locomotor stimulant effects but blocks sensitization to amphetamine

M E Wolf et al. Brain Res. 1991.

Abstract

Repeated amphetamine administration produced behavioral sensitization to subsequent amphetamine challenge. The development of sensitization was blocked by coadministration of the N-methyl-D-aspartate (NMDA) antagonist MK-801. Conditioned locomotion, as revealed by saline challenge, was also blocked by MK-801, suggesting that behavioral sensitization and conditioned locomotion may share a requirement for NMDA receptor stimulation. Repeated MK-801 administration produced behavioral sensitization to MK-801 but not amphetamine challenge, suggesting that MK-801 itself produces sensitization through a different mechanism than amphetamine.

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