Evidence map›Paper›PMID 42608785›Full record

ArticlePhysiological reports2026

Reorganization of synchronous and asynchronous release in developing hippocampal autaptic neurons of mice.

Kouya Uchino, Hiroyuki Kawano, Risako Fujikawa, Takuya Watanabe, Katsunori Iwasaki, Shin-Ya Kawaguchi, Shutaro Katsurabayashi

Abstract read
In one paragraph

Article in Physiological reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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3 · Its place in the literature

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4 · The record

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5 · Who and what money

Authors and funding

7 authors.

Kouya UchinoDepartment of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan.
Hiroyuki KawanoDepartment of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan.
Risako FujikawaDepartment of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan.
Takuya WatanabeDepartment of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan.
Katsunori IwasakiDepartment of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan.
Shin-Ya KawaguchiDepartment of Biophysics, Graduate School of Science, Kyoto University, Kyoto, Japan.
Shutaro KatsurabayashiDepartment of Neuropharmacology, Faculty of Pharmaceutical Sciences, Fukuoka University, Fukuoka, Japan.ORCID https://orcid.org/0000-0002-8595-5820

Funding

MEXT | Japan Society for the Promotion of Science (JSPS) 23K27496MEXT | Japan Society for the Promotion of Science (JSPS) 24H02336MEXT | Japan Society for the Promotion of Science (JSPS) 25H02611MEXT | Japan Society for the Promotion of Science (JSPS) 25K02362MEXT | Japan Society for the Promotion of Science (JSPS) 25K23755Mochida Memorial Foundation for Medical and Pharmaceutical Research ( )
6 · The paper itself

Abstract

Presynaptic vesicle pools, particularly the readily releasable pool (RRP), are essential for synaptic transmission. The RRP comprises fast-release pool (FRP) and slow-release pool (SRP) subpopulations that mediate synchronous and asynchronous neurotransmitter release, respectively, yet their developmental regulation remains unclear. To investigate this question, we utilized a hippocampal autaptic culture system to analyze synaptic function in individual excitatory neurons at 1, 2, and 3 weeks in vitro. We observed significant enhancements in both synaptic transmission efficiency and the size of RRP with neuronal maturation. Despite the increase in vesicle availability, the probability of vesicular release (Pvr) decreased during development, suggesting a shift in RRP composition or priming status. Although both synchronous and asynchronous release increased in absolute magnitude during development, the relative contribution of asynchronous release to total release declined with maturation, indicating a shift toward synchronous release in mature neurons. Furthermore, while the overall RRP refilling rate remained constant across development, early recovery of EPSCs after depletion was modestly faster in mature neurons. This finding may suggest preferential recruitment of vesicles into the FRP in mature neurons. These findings demonstrate a developmental reorganization of presynaptic vesicle pools that optimizes synchronous release and enhances temporal precision in mature synapses.

Indexed as

HippocampusNeuronsSynaptic TransmissionSynaptic VesiclesAnimalsCells, CulturedExcitatory Postsynaptic PotentialsMiceNeurodevelopmentasynchronous releasesynaptic developmentsynaptic transmissionsynchronous releasevesicle pool dynamics

Identifiers

PMID42608785
PMCPMC13481710

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.