Loss of the serum response factor in the dopaminesystem leads to hyperactivity
2010 (English)In: The FASEB Journal, ISSN 0892-6638, E-ISSN 1530-6860, Vol. 24, 2427-2435 p.Article in journal (Refereed) Published
The serum response factor (SRF) is a key regulator of neural development and cellular plasticity, which enables it to act as a regulator of long-term adaptations in neurons. Here we performed a comprehensive analysis of SRF function in the murine dopamine system. We found that loss of SRF in dopaminoceptive, but not dopaminergic, neurons is responsible for the development of a hyperactivity syndrome, characterized by reduced body weight into adulthood, enhanced motor activity, and deficits in habituation processes. Most important, the hyperactivity also develops when the ablation of SRF is induced in adult animals. On the molecular level, the loss of SRF in dopaminoceptive cells is associated with altered expression of neuronal plasticity-related genes, in particular transcripts involved in calcium ion binding, formation of the cytoskeleton, and transcripts encoding neuropeptide precursors. Furthermore, abrogation of SRF causes specific deficits in activity-dependent transcription, especially a complete lack of psychostimulant-induced expression of the Egr genes. We inferred that alterations in SRFdependent gene expression underlie the observed hyperactive behavior. Thus, SRF depletion in dopaminoceptive neurons might trigger molecular mechanisms responsible for development of psychopathological conditions involving hyperactivity.
Place, publisher, year, edition, pages
Federation of American Societies for Experimental Biology , 2010. Vol. 24, 2427-2435 p.
National CategoryMedical and Health Sciences
IdentifiersURN: urn:nbn:se:liu:diva-65545DOI: 10.1096/fj.09-151423OAI: oai:DiVA.org:liu-65545DiVA: diva2:396666