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- W2969358468 abstract "Long-term potentiation (LTP), an increase in synaptic efficacy following high-frequency stimulation, is widely considered a mechanism of learning. LTP involves local remodeling of dendritic spines and synapses. Smooth endoplasmic reticulum (SER) and endosomal compartments could provide local stores of membrane and proteins, bypassing the distant Golgi apparatus. To test this hypothesis, effects of LTP were compared to control stimulation in rat hippocampal area CA1 at postnatal day 15 (P15). By two hours, small spines lacking SER increased after LTP, whereas large spines did not change in frequency, size, or SER content. Total SER volume decreased after LTP consistent with transfer of membrane to the added spines. Shaft SER remained more abundant in spiny than aspiny dendritic regions, apparently supporting the added spines. Recycling endosomes were elevated specifically in small spines after LTP. These findings suggest local secretory trafficking contributes to LTP-induced synaptogenesis and primes the new spines for future plasticity." @default.
- W2969358468 created "2019-08-29" @default.
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- W2969358468 date "2019-08-21" @default.
- W2969358468 modified "2023-10-17" @default.
- W2969358468 title "Structural plasticity of dendritic secretory compartments during LTP-induced synaptogenesis" @default.
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- W2969358468 doi "https://doi.org/10.7554/elife.46356" @default.
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