ArticleProceedings of the National Academy of Sciences of the United States of America2025
Synaptic transmission is dispensable for selecting the winner input but is crucial for the subsequent events of synapse elimination.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 3 papers.
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Who cites it
3 citing papers in PubMed.
- Molecular and Cellular Mechanisms of Synaptogenesis and Synaptic Refinement During Cerebellar Circuit Formation.International journal of molecular sciences · 2026Review
- Competitive Olivocerebellar Input Selection Promotes Resilient Circuit Formation.bioRxiv : the preprint server for biology · 2026Article
- mGluR1 signaling is necessary for strengthening winner climbing fiber inputs in the developing mouse cerebellum.Proceedings of the National Academy of Sciences of the United States of America · 2026Article
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Authors and funding
6 authors.
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Abstract
Synaptic transmission has long been thought to regulate neuronal wiring during postnatal development, but this assumption remains largely untested. Selective strengthening of a single "winner" climbing fiber (CF) afferent to each Purkinje cell (PC) and elimination of the other "loser" CF axons in the cerebellum has been a representative model of neural circuit refinement. Here, we examined the role of neurotransmission at CF-PC synapses in their postnatal development. We labeled a subset of CFs in neonatal mice with fluorescent markers and the tetanus toxin light chain to ablate neurotransmitter release from these CFs. Surprisingly, we found that such neurotransmitter release-deficient CFs were able to become the winners. However, synaptic transmission was crucial for the winning CF to extend its synaptic territory along the PC dendritic arbor and eliminate the loser CFs. These findings reveal how synaptic transmission governs multiple steps of synapse elimination but not the selection of the winner input that persists throughout life.
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