In nerve cells, regulated local synthesis in dendrites of a number of key postsynaptic proteins may be of critical relevance for the long-term structural and functional plasticity of synaptic connections. An essential prerequisite for such a mechanism is the targeted transport of select RNAs to dendritic sites of translation. The notion of specific RNA transport in dendrites has gained support by the recent observation in the applicant's lab that a cis-acting signaling element that is contained with a dendritic RNA is responsible for the targeting of the RNA to dendrites. Based on these data, the central objectives of this research project are defined as the dissection of RNA transport mechanisms in dendrites and the analysis of feedback mechanisms that would allow the local regulation of dendritic RNA transport through physiological events at the synapse.
In Specific Aim 1 it is planned to define, in terms of primary and/or higher order structure, the physical fine structure of minimal essential targeting module(s). In the Second Aim, it will be established whether and how transport of dendritic RNAs is regulated through neuronal activity. Under this Specific Aim is the question of what mechanisms are being used by neurons to modulate the diversity of dendritic proteins in response to functional input at the synapse. The overall goal of this research project is thus to ascertain the functional significance of dendritic RNA transport mechanisms that are likely to be of vital importance in the regulation of mosaic postsynaptic protein repertoires, and thus for the development and long-term plasticity of synaptic connections between nerve cells.

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
3R01NS034158-06S1
Application #
6322289
Study Section
Neurology B Subcommittee 2 (NEUB)
Program Officer
Chiu, Arlene Y
Project Start
1994-08-01
Project End
2002-04-30
Budget Start
2000-05-01
Budget End
2001-04-30
Support Year
6
Fiscal Year
2000
Total Cost
$50,000
Indirect Cost
Name
Suny Downstate Medical Center
Department
Physiology
Type
Schools of Medicine
DUNS #
068552207
City
Brooklyn
State
NY
Country
United States
Zip Code
11203
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Wang, Huidong; Iacoangeli, Anna; Popp, Susanna et al. (2002) Dendritic BC1 RNA: functional role in regulation of translation initiation. J Neurosci 22:10232-41

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