alexa Expression of the cAMP response element binding protein (CREB) in hippocampus produces an antidepressant effect.
Medicine

Medicine

Evidence based Medicine and Practice

Author(s): Chen AC, Shirayama Y, Shin KH, Neve RL, Duman RS, Chen AC, Shirayama Y, Shin KH, Neve RL, Duman RS

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Abstract BACKGROUND: Recent studies have demonstrated that chronic antidepressant treatment increases the expression of the cyclic amp (cAMP) response element binding protein (CREB) in rat hippocampus. The study presented here was conducted to determine if CREB is a relevant target that produces an antidepressant-like effect. METHODS: We employed the herpes simplex virus (HSV)-mediated gene transfer technique to overexpress CREB and determined its effect on the learned helplessness and forced swim tests, two established models used for pharmacological screening of antidepressant drugs. RESULTS: In the learned helplessness model, rats that received bilateral microinjection of HSV-CREB into the dentate gyrus showed significantly fewer escape failures in the subsequent conditioned avoidance test than those injected with control vector (HSV-LacZ). In contrast, microinjection of HSV-CREB in either the CA1 pyramidal cell layer of hippocampus or the prefrontal cortex did not produce an antidepressant response. In the forced swim test, CREB expression in the dentate gyrus resulted in a significantly shorter immobility time than those injected with HSV-LacZ. CONCLUSIONS: These results demonstrate that over-expression of CREB in hippocampus results in an antidepressant effect and suggest that CREB may serve as a potential molecular target for novel therapeutic agents.
This article was published in Biol Psychiatry and referenced in Evidence based Medicine and Practice

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