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Intracellular injections of EGTA block induction of hippocampal long-term potentiation
Abstract
Hippocampal long-term potentiation (LTP) is a remarkably stable facilitation of synaptic responses resulting from very brief trains of high-frequency stimulation. Because of its persistence and modest induction conditions, LTP represents a promising candidate for a substrate of memory. Some progress has been made in localizing the changes responsible for the effect; for example, it has been shown that LTP is not accompanied by changes in the fibre volleys of the test afferents or by generalized alterations of the dendrites of their target cells. However, it is unknown whether the potentiation is due to pre- or postsynaptic changes and there is evidence in favour of each (for example, see refs 5, 6). We now report that intracellular injections of the calcium chelator EGTA block the development of LTP. These results strongly suggest that LTP is caused by a modification of the postsynaptic neurone and that its induction depends on the level of free calcium.
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“loading postsynaptic cells with the Ca2+ chelator EGTA blocked LTP (176), suggesting that Ca2+ is necessary for LTP.”
From Synaptic memory and CaMKII (2023) · cites this paper as [176]
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Metadata
- Authors
- Lynch, G., Larson, J., Kelso, S., Barrionuevo, G., & Schottler, F.
- Affiliations
- University of California, Irvine (US)
- ORCID
- Lynch, Gary
- Venue
- Nature
- Published
- 1983-10
- Volume
- 305
- Issue
- 5936
- Pages
- 719-721
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W2031739172
- Cited by
- 1,116
- References
- 16
- Citations by year
- 2026: 6 · 2025: 9 · 2024: 11 · 2023: 7 · 2022: 10 · 2021: 9 · 2020: 9 · 2019: 25 · 2018: 18 · 2017: 14 · 2016: 16 · 2015: 19 · 2014: 17 · 2013: 19 · 2012: 28
- FWCI
- 6.65
- Type
- journal article
- Language
- en
- Open access
- closed
- Licence
- www.springer.com/tdm (tdm)
- Locations
- Nature (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Neuroscience and Neuropharmacology Research
- Life Sciences › Neuroscience › Cognitive Neuroscience › Memory and Neural Mechanisms
- Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
- Keywords
- long-term potentiation, hippocampus, EGTA, calcium chelation, intracellular injection, free calcium, synaptic plasticity, memory substrate, high-frequency stimulation
- MeSH terms
- Animals, Calcium, Egtazic Acid, Electric Stimulation, Ethylene Glycols, Evoked Potentials, Hippocampus, Membrane Potentials, Time Factors, Rats
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