Abstract
The molecular pathways involved in retrograde signal transduction at synapses and the function of retrograde communication are poorly understood. Here, we demonstrate that postsynaptic calcium 2 + ion (Ca 2+ ) influx through glutamate receptors and subsequent postsynaptic vesicle fusion trigger a robust induction of presynaptic miniature release after high-frequency stimulation at Drosophila neuromuscular junctions. An isoform of the synaptotagmin family, synaptotagmin 4 (Syt 4), serves as a postsynaptic Ca 2+ sensor to release retrograde signals that stimulate enhanced presynaptic function through activation of the cyclic adenosine monophosphate (cAMP)–cAMP-dependent protein kinase pathway. Postsynaptic Ca 2+ influx also stimulates local synaptic differentiation and growth through Syt 4–mediated retrograde signals in a synapse-specific manner.
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Dates
Type | When |
---|---|
Created | 19 years, 10 months ago (Nov. 3, 2005, 4:48 p.m.) |
Deposited | 1 year, 7 months ago (Jan. 9, 2024, 9:09 p.m.) |
Indexed | 1 month, 1 week ago (July 27, 2025, 3:21 a.m.) |
Issued | 19 years, 10 months ago (Nov. 4, 2005) |
Published | 19 years, 10 months ago (Nov. 4, 2005) |
Published Print | 19 years, 10 months ago (Nov. 4, 2005) |
@article{Yoshihara_2005, title={Retrograde Signaling by Syt 4 Induces Presynaptic Release and Synapse-Specific Growth}, volume={310}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.1117541}, DOI={10.1126/science.1117541}, number={5749}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Yoshihara, Motojiro and Adolfsen, Bill and Galle, Kathleen T. and Littleton, J. Troy}, year={2005}, month=nov, pages={858–863} }