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Ethanol self-administration differentially upregulates BDNF expression within the DLS and the DMS. Rats were killed 30 min after the end of a 30 min self-administration session, and brain samples were collected for RT-PCR analysis and compared with naive animals (n = 4). To avoid inaccuracy of the analysis due to the low baseline levels of BDNF expression in the naive groups, quantification was not conducted.
