“…An important finding was that these 25 transcripts encode for a wide variety of proteins involved in neuronal growth, apoptosis, neurotransmission, transcription, translation and cell metabolism. This is consistent with reports from others, showing that addictive drugs are able to induce (long-lasting) alterations in neuronal morphology (Robinson and Kolb, 1999a,b;Robinson et al, 2001), neurotransmission (Vanderschuren and , transcription (Cha et al, 1997;Kelz and Nestler, 2000;Mackler et al, 2000) and cell metabolism (Couceyro et al, 1997) in the NAc. Also, drug-induced apoptosis-related processes have been shown in the brain (Boronat et al, 2001;Hu et al, 2002).…”