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- W2911675194 endingPage "19.2019" @default.
- W2911675194 startingPage "ENEURO.0007" @default.
- W2911675194 abstract "Low-threshold mechanosensitive C fibers (C-LTMRs) that express the vesicular glutamate transporter VGLUT3 are thought to signal affective touch, and may also play a role in mechanical allodynia. However, the nature of the central termination of C-LTMRs in the dorsal horn remains largely unexplored. Here, we used light and electron microscopy in combination with VGLUT3 immunolabeling as a marker of C-LTMR terminations to investigate this issue. VGLUT3 + C-LTMRs formed central terminals of Type II glomeruli in the inner part of lamina II of the dorsal horn, often establishing multiple asymmetric synapses with postsynaptic dendrites but also participating in synaptic configurations with presynaptic axons and dendrites. Unexpectedly, essentially all VGLUT3 + C-LTMR terminals showed substantial VGLUT1 expression in the rat, whereas such terminals in mice lacked VGLUT1. Most VGLUT3 + C-LTMR terminals exhibited weak-to-moderate VGLUT2 expression. Further, C-LTMR terminals formed numerous synapses with excitatory protein kinase Cγ (PKCγ) interneurons and inhibitory parvalbumin neurons, whereas synapses with calretinin neurons were scarce. C-LTMR terminals rarely if ever established synapses with neurokinin 1 receptor (NK1R)-possessing dendrites traversing lamina II. Thus, VGLUT3 + C-LTMR terminals appear to largely correspond to neurofilament-lacking central terminals of Type II glomeruli in inner lamina II and can thus be identified at the ultrastructural level by morphological criteria. The participation of C-LTMR terminals in Type II glomeruli involving diverse populations of interneuron indicates highly complex modes of integration of C-LTMR mediated signaling in the dorsal horn. Furthermore, differences in VGLUT1 expression indicate distinct species differences in synaptic physiology of C-LTMR terminals." @default.
- W2911675194 created "2019-02-21" @default.
- W2911675194 creator A5034285165 @default.
- W2911675194 creator A5068836593 @default.
- W2911675194 date "2019-01-01" @default.
- W2911675194 modified "2023-09-25" @default.
- W2911675194 title "Synaptic Organization of VGLUT3 Expressing Low-Threshold Mechanosensitive C Fiber Terminals in the Rodent Spinal Cord" @default.
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- W2911675194 doi "https://doi.org/10.1523/eneuro.0007-19.2019" @default.
- W2911675194 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6378328" @default.
- W2911675194 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/30783617" @default.
- W2911675194 hasPublicationYear "2019" @default.
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