This program project for Neuroscience Work Groups in Mental Health will be carried out at New York University Medical Center and Karolinska Institute, Stockholm, and will investigate the role of dopaminergic and peptidergic neuronal systems in CNS function in physiological and pathological states. The anatomical, biochemical and physiological heterogeneities of the dopamine (DA) neurons will be studied. Immunohistochemistry, in combination with in situ hybridization and retrograde tracing, will be used for studies on localization and cellular differentiation of DA and specific neuropeptides, as well nontransmitter proteins. These three procedures represent complementary methodology and are much more powerful in combination than any one alone. The colocalization of DA with other transmitter and nontransmitter substances will identify distinct subsets of DA neurons, and may serve as a marker for specific subsets of DA neurons which share certain regulatory mechanisms. It will be possible to quantitatively establish differences in tyrosine hydroxylase (TH) mRNA in different DA populations and define the rate of expression of TH in different midbrain DA cells in relation to coexistent peptides. The differences in responsiveness to acute and chronic neuroleptic treatment may be attributable to the density of autoreceptors regulating synthesis and/or release of DA in different forebrain DA innervation. It may therefore be possible to define distinct populations of midbrain DA neurons on the basis of immunohistochemical staining for the D2 DA receptor binding sites. Furthermore, the mechanisms involved in the desensitization of various DA receptor subtypes will be investigated and the coupling between D1 DA receptor binding protein and adenylate cyclase in postmortem non-schizophrenic and schizophrenic brain will be studied.

Agency
National Institute of Health (NIH)
Institute
National Institute of Mental Health (NIMH)
Type
Research Program Projects (P01)
Project #
5P01MH043230-05
Application #
3099084
Study Section
Special Emphasis Panel (SRCM)
Project Start
1988-01-01
Project End
1993-12-31
Budget Start
1992-03-01
Budget End
1993-12-31
Support Year
5
Fiscal Year
1992
Total Cost
Indirect Cost
Name
New York University
Department
Type
Schools of Medicine
DUNS #
004514360
City
New York
State
NY
Country
United States
Zip Code
10012
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