Serotonin (5-HT) functions both as a neurotransmitter and as a growth factor to modulate brain function and brain development. In addition, 5-HT has been implicated in the etiology and treatment of numerous neuropsychiatric disorders. Specifically, drugs which target the 5-HT system, such as selective 5-HT reuptake inhibitors (SSRIs) are currently used as the first-line treatment for depression and anxiety disorders. Furthermore, several lines of evidence suggest that commonly occurring functional polymorphisms in the promoter region of the serotonin transporter gene (5htt) are associated with increased susceptibility to neuropsychiatric disorders such as neuroticism, depression, and anxiety. Others and we have hypothesized that these variants exert their effects on adult emotional behavior during early brain development. We have preiviously shown that this genetic predisposition can be modeled in mice by constitutive 5htt ablation. Furthermore, we have demonstrated that developmental 5-HTT blockade (PNFLX treatment) mimics the effect of genetic 5htt ablation, supporting the hypothesis that developmental disruption of 5-HTT function elicits changes in adult emotional behavior. Yet, knowledge of how serotonin acts to alter brain development, especially as it relates to adult anxiety and depression-related behaviors, is still hampered by multiple gaps in knowledge. Our proposed experiments aim at filling these gaps and focus on investigating the effects of early-life 5-HTT blockade on the development of raphe function.
The first aim v yill investigate the physiology of raphe serotonergic neurons in PNFLX treated mice.
The second aim will investigate circuitry mediated modulation of raphe physiology in PNFLX treated mice.
The third aim will investigate the anatomy of the serotonin system in PNFLX treated mice. Finally, our fourth aim will investigate the causal involvement of raphe activity in the etiology of depression and anxiety-like behaviors.

Agency
National Institute of Health (NIH)
Institute
National Institute of Mental Health (NIMH)
Type
Research Transition Award (R00)
Project #
5R00MH083044-05
Application #
8265678
Study Section
Special Emphasis Panel (NSS)
Program Officer
Panchision, David M
Project Start
2008-09-30
Project End
2013-05-31
Budget Start
2012-06-01
Budget End
2013-05-31
Support Year
5
Fiscal Year
2012
Total Cost
$240,946
Indirect Cost
$17,848
Name
New York State Psychiatric Institute
Department
Type
DUNS #
167204994
City
New York
State
NY
Country
United States
Zip Code
10032