This thesis contributes to the deeper understanding of the processes of specification and maintenance of neural progenitor pools in the embryo and adult and to the mechanisms of reward and drug reinforcement in zebrafish. A novel member of the Hairy/Enhancer of Split family – Her8a – was isolated and shown to be a negative regulator of neurogenesis, with a cellular-context-dependent response to Notch. In addition, a molecular characterisation of a dominant mutant – no addiction (nad) – was carried out, using microarray approach, followed by validation work and bioinformatic analysis. This work implicates for the first time the reuse of developmental transcription factors in the plasticity events arising from drug use and reward. It also further strengthens links between drug reinforcement and adult neurogenesis.
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This thesis contributes to the deeper understanding of the processes of specification and maintenance of neural progenitor pools in the embryo and adult and to the mechanisms of reward and drug reinforcement in zebrafish. A novel member of the Hairy/Enhancer of Split family – Her8a – was isolated and shown to be a negative regulator of neurogenesis, with a cellular-context-dependent response to Notch. In addition, a molecular characterisation of a dominant mutant – no addiction (nad) – was carr...
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