Long-term depression induction and maintenance across regions of the apical branch of CA1 dendrites.
early-LTD
hippocampal slice in vitro
late-LTD
protein synthesis
synaptic cross-tagging
Journal
Hippocampus
ISSN: 1098-1063
Titre abrégé: Hippocampus
Pays: United States
ID NLM: 9108167
Informations de publication
Date de publication:
09 2023
09 2023
Historique:
revised:
10
05
2023
received:
16
06
2022
accepted:
10
05
2023
medline:
23
8
2023
pubmed:
31
5
2023
entrez:
31
5
2023
Statut:
ppublish
Résumé
Well known as the center for learning and memory, hippocampus is the crucial brain region to study synaptic plasticity in the context of cellular fundamental mechanisms such as long-term depression (LTD) and long-term potentiation (LTP). However, despite years of extensive research, the key to our LTD queries and their induction mechanisms has not been fully understood. Previously, we reported the induction of late-LTD (L-LTD) in the distally located synapses of apical branch of hippocampal CA1 dendrites using strong low-frequency stimulation (SLFS). In contrast synapses at the proximal site could not express L-LTD. Thus, in the present study, we wanted to investigate whether or not synapses of apical dendritic branch at the proximal location could induce and maintain LTD and its related properties in in vitro rat hippocampal slices. Results indicated that the SLFS in the distal and proximal region triggered the plasticity related proteins (PRP) synthesis in both regions, as evident by the induction and maintenance of L-LTD in the distal region by virtue of synaptic and cross-tagging. In addition, the application of emetine at the time of proximal input stimulation prevented the transition of early-LTD (E-LTD) into L-LTD at the distal region, proving PRP synthesis at the proximal site. Further, it was observed that weak low-frequency stimulation (WLFS) could induce E-LTD in the proximal region along with LTD-specific tag-setting at the synapses. In conclusion, the current study suggests unique findings that the synaptic and cross-tagging mediate L-LTD expression is maintained in the proximal location of hippocampus apical CA1 dendrites.
Types de publication
Journal Article
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1058-1066Informations de copyright
© 2023 Wiley Periodicals LLC.
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