Abstract
The glutamate hypothesis of schizophrenia postulates NMDA receptor hypofunction as important pathophysiological mechanism. In rodents, NMDA receptor antagonists induce together with psychosis-like effects cortical injury. Stress during adolescence can trigger schizophrenia by unknown mechanisms. Here we show in rats that juvenile chronic isolation significantly increases MK-801-triggered expression of heat shock protein 70, a marker of neuronal injury, in the retrosplenial cortex. These data suggest an additive effect of juvenile stress and NMDA receptor blockade, with possible relevance for schizophrenia.
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