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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Greengard, P. Schaeffer, E. Alder, J. Poo, M. M. |
| Description | Author Affiliation: Schaeffer E ( Laboratory of Molecular and Cellular Neuroscience, Rockefeller University, New York, NY 10021.); |
| Abstract | We have investigated the possible involvement of the synaptic vesicle protein synapsin IIa in synapse development. Synapsin IIa was introduced into Xenopus embryonic spinal neurons by early blastomere injection, and nerve-muscle cultures were prepared. Synaptic currents were measured by comparing synapses in which the presynaptic neuron either contained [syn IIa (+)] or lacked (control) exogenous synapsin IIa. Syn IIa (+) synapses had a 3.6-fold increase in the frequency and a 2.1-fold increase in the amplitude of spontaneous synaptic currents, compared to controls, after 2 days in culture. Synapsin IIa also increased the amplitude of evoked synaptic currents by 2.3-fold in 2-day cultures. The evoked synaptic current amplitudes of syn IIa (+) synapses had a lower coefficient of variation indicating a more stable evoked response. These enhanced synaptic activities were independent of the presence or absence of the protein in the postsynaptic muscle cell. The findings indicate a role for synapsin IIa in synapse maturation. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 9 |
| Volume Number | 91 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1994-06-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Neuromuscular Junction Physiology Synapses Synapsins Acetylcholine Animals Cell Differentiation Cells, Cultured Electrophysiology In Vitro Techniques Cytology Recombinant Proteins Pharmacology Synaptic Transmission Xenopus Laevis Embryology Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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