Published in:
Open Access
01-12-2011 | Research
Activity-dependent brain-derived neurotrophic factor expression regulates cortistatin-interneurons and sleep behavior
Authors:
Keri Martinowich, Robert J Schloesser, Dennisse V Jimenez, Daniel R Weinberger, Bai Lu
Published in:
Molecular Brain
|
Issue 1/2011
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Abstract
Background
Sleep homeostasis is characterized by a positive correlation between sleep length and intensity with the duration of the prior waking period. A causal role for brain-derived neurotrophic factor (BDNF) in sleep homeostasis has been suggested, but the underlying mechanisms remain unclear. Cortistatin, a neuropeptide expressed primarily in a subset of cortical GABAergic interneurons, is another molecule implicated in sleep homeostasis.
Results
We confirmed that sleep deprivation leads to an increase in cortical cortistatin mRNA expression. Disruption of activity-dependent BDNF expression in a genetically modified mouse line impairs both baseline levels of cortistatin mRNA as well as its levels following sleep deprivation. Disruption of activity-dependent BDNF also leads to a decrease in sleep time during the active (dark) phase.
Conclusion
Our studies suggest that regulation of cortistatin-expressing interneurons by activity-dependent BDNF expression may contribute to regulation of sleep behavior.