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• W2802370901 abstract "In developing sensory systems, elaborate morphological connectivity between peripheral cells and first-order central neurons emerges via genetic programming before the onset of sensory activities. However, how the first-order central neurons acquire the capacity to interface with peripheral cells remains elusive. By making patch-clamp recordings from mouse brainstem slices, we found that a subset of neurons in the cochlear nuclei, the first central station to receive peripheral acoustic impulses, exhibits spontaneous firings (SFs) as early as at birth, and the fraction of such neurons increases during the prehearing period. SFs are reduced but not eliminated by a cocktail of blockers for excitatory and inhibitory synaptic inputs, implicating the involvement of intrinsic pacemaker channels. Furthermore, we demonstrate that these intrinsic firings (IFs) are largely driven by hyperpolarization- and cyclic nucleotide-gated channel (HCN) mediated currents (Ih), as evidenced by their attenuation in the presence of HCN blockers or in neurons from HCN1 knockout mice. Interestingly, genetic deletion of HCN1 cannot be fully compensated by other pacemaker conductances and precludes age-dependent up regulation in the fraction of spontaneous active neurons and their firing rate. Surprisingly, neurons with SFs show accelerated development in excitability, spike waveform and firing pattern as well as synaptic pruning towards mature phenotypes compared to those without SFs. Our results imply that SFs of the first-order central neurons may reciprocally promote their wiring and firing with peripheral inputs, potentially enabling the correlated activity and crosstalk between the developing brain and external environment." @default.
• W2802370901 created "2018-05-17" @default.
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• W2802370901 date "2018-05-31" @default.
• W2802370901 modified "2023-09-25" @default.
• W2802370901 title "Accelerated Development of the First-Order Central Auditory Neurons With Spontaneous Activity" @default.
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• W2802370901 doi "https://doi.org/10.3389/fnmol.2018.00183" @default.
• W2802370901 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5990604" @default.
• W2802370901 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29904342" @default.
• W2802370901 hasPublicationYear "2018" @default.
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