The proposed work will investigate alterations in molecular and structural properties of the morphological synapse during brain maturation. In previous studies we have identified and characterized carbohydrates, lipids, proteins, glycoproteins and enzymes that are present in mature synaptic junctions. This information, in part, represents a strong foundation on which our studies of the developing synapse can be based. First, we will systematically optimize conditions for isolating highly purified and morphologically intact synaptic junctions from immature cerebral cortex. In preliminary studies, we have successfully isolated synaptic junctions at different times during the course of in vivo synaptogenesis. Second, we will examine age-dependent changes in proteins and glycoproteins of isolated synaptic junctions. Using membrane surface labeling we will examine the appearance and topographical orientation of developmentally regulated synaptic membrane surface components. Special attention will be paid to determining differences in the molecular composition between extrajunctional and synaptic junctional plasma membranes. Covalent cross-linking studies will be used to investigate protein-protein interactions that are related to changes in the molecular organization of synaptic junctions during development. Cyto- and immunohistochemical methods will be used to examine the distribution of the filamentous proteins tubulin and actin and cell surface glycoproteins that bind Con A. Furthermore, we will determine if these components constitute a postsynaptic """"""""surface modulating assembly.""""""""

Agency
National Institute of Health (NIH)
Institute
National Institute of Neurological Disorders and Stroke (NINDS)
Type
Research Project (R01)
Project #
7R01NS022452-01
Application #
3404852
Study Section
Neurological Sciences Subcommittee 1 (NLS)
Project Start
1984-12-01
Project End
1986-11-30
Budget Start
1984-12-01
Budget End
1985-11-30
Support Year
1
Fiscal Year
1985
Total Cost
Indirect Cost
Name
University of Texas Health Science Center Houston
Department
Type
Schools of Medicine
DUNS #
City
Houston
State
TX
Country
United States
Zip Code
77225
Chen, J; Kelly, P T (1996) Retinoic acid stimulates alpha-CAMKII gene expression in PC12 cells at a distinct transcription initiation site. J Neurosci 16:5704-14
Cormier, R J; Kelly, P T (1996) Glutamate-induced long-term potentiation enhances spontaneous EPSC amplitude but not frequency. J Neurophysiol 75:1909-18
Huber, K M; Mauk, M D; Thompson, C et al. (1995) A critical period of protein kinase activity after tetanic stimulation is required for the induction of long-term potentiation. Learn Mem 2:81-100
Huber, K M; Mauk, M D; Kelly, P T (1995) Distinct LTP induction mechanisms: contribution of NMDA receptors and voltage-dependent calcium channels. J Neurophysiol 73:270-9
Huber, K M; Mauk, M D; Kelly, P T (1995) LTP induced by activation of voltage-dependent Ca2+ channels requires protein kinase activity. Neuroreport 6:1281-4
Norling, L L; Colca, J R; Kelly, P T et al. (1994) Activation of calcium and calmodulin dependent protein kinase II during stimulation of insulin secretion. Cell Calcium 16:137-50
Cormier, R J; Mauk, M D; Kelly, P T (1993) Glutamate iontophoresis induces long-term potentiation in the absence of evoked presynaptic activity. Neuron 10:907-19
Burgin, K E; Waxham, M N; Rickling, S et al. (1990) In situ hybridization histochemistry of Ca2+/calmodulin-dependent protein kinase in developing rat brain. J Neurosci 10:1788-98
Yip, R K; Kelly, P T (1989) In situ protein phosphorylation in hippocampal tissue slices. J Neurosci 9:3618-30
Kelly, P T; Weinberger, R P; Waxham, M N (1988) Active site-directed inhibition of Ca2+/calmodulin-dependent protein kinase type II by a bifunctional calmodulin-binding peptide. Proc Natl Acad Sci U S A 85:4991-5

Showing the most recent 10 out of 13 publications