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• W2034247498 abstract "In this report we provide evidence that repeated stress prevents cocaine-induced activation of BDNF expression and signaling in rat prefrontal cortex. A single injection of cocaine up-regulates BDNF expression in sham (i.e. unstressed) rats but not in repeatedly stressed rats. Similarly, the expression as well as trafficking of the high affinity BDNF receptor trkB promoted by the psychostimulant is impaired in chronically-stressed rats challenged with cocaine. Moreover, among the different intracellular signaling pathways that can be activated by the neurotrophin, i.e. ERK1/2-, Akt- and PLCgamma-pathway, we found that cocaine is able to selectively activate the ERK1/2 pathway in sham animals, but not in rats exposed to repeated stress. Notably, such changes take place in chronically-stressed animals although they still retain the ability to increase neuronal activity as measured by the enhancement of Arc gene expression. In summary, we have demonstrated that stress globally interferes with BDNF-mediated signaling responses to cocaine challenge, providing key insights into the molecular basis of stress-cocaine interaction and indicating the critical role of the prefrontal cortex in mediating such interaction." @default.
• W2034247498 created "2016-06-24" @default.
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• W2034247498 date "2009-06-01" @default.
• W2034247498 modified "2023-10-01" @default.
• W2034247498 title "Repeated stress prevents cocaine-induced activation of BDNF signaling in rat prefrontal cortex" @default.
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• W2034247498 doi "https://doi.org/10.1016/j.euroneuro.2009.01.003" @default.
• W2034247498 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/19223270" @default.
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