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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Carew, T. J. Marcus, E. A. |
| Description | Author Affiliation: Marcus EA ( Department of Cellular, Molecular and Developmental Biology, Yale University, New Haven, CT 06520-8205, USA.); |
| Abstract | The capacity for neuromodulation and biophysical plasticity is a defining feature of most mature neuronal cell types. In several cases, modulation at the level of the individual neuron has been causally linked to changes in the functional output of a neuronal circuit and subsequent adaptive changes in the organism's behavioral responses. Understanding how such capacity for neuromodulation develops therefore may provide insights into the mechanisms both of neuronal development and learning and memory. We have examined the development of multiple forms of neuromodulation triggered by a common neurotransmitter, serotonin, in the pleural sensory neurons of Aplysia californica. We have found that multiple signaling cascades within a single neuron develop sequentially, with some being expressed only very late in development. In addition, our data suggest a model in which, within a single neuromodulatory pathway, the elements of the signaling cascade are developmentally expressed in a 'retrograde' manner with the ionic channel that is modulated appearing early in development, functional elements in the second messenger cascade appearing later, and finally, coupling of the second messenger cascade to the serotonin receptor appearing quite late. These studies provide the characterization of the development of neuromodulation at the level of an identified cell type and offer insights into the potential roles of neuromodulatory processes in development and adult plasticity. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 8 |
| Volume Number | 95 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 1998-05-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Ganglia, Invertebrate Physiology Neurons, Afferent Action Potentials Aging Animals Aplysia Embryology Growth & Development Cyclic AMP Metabolism Embryo, Nonmammalian Memory Neuronal Plasticity Drug Effects Phorbol Esters Pharmacology Protein Kinase C Second Messenger Systems Serotonin Signal Transduction Tail Tetraethylammonium Research Support, U.S. Gov't, Non-P.H.S. Research Support, U.S. Gov't, P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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