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Synaptic transmission is the biological process by which a neuron communicates with a target cell across a synapse. Chemical synaptic transmission involves the release of a neurotransmitter from the pre-synaptic neuron, and neurotransmitter binding to specific post-synaptic receptors. Electrical synapse transmission involves the transfer of electrical signals through gap junctions.
RoboEM, an artificial intelligence (AI)-based flight agent, automatically steers through three-dimensional electron microscopy (3D-EM) images of brain tissue to follow neurites. RoboEM substantially improves state-of-the-art automated reconstructions, eliminating manual proofreading needs in complex connectomic analysis problems and paving the way for high-throughput, cost-effective, large-scale mapping of neuronal networks — connectomes.
How synapses at dendrites are organized to optimize information processing remains elusive. Here, the authors found that intracellular magnesium optimizes transmission, plasticity, and coding capacity of synapses by reconfiguring their connectivity at dendrites.
SNARE-dependent membrane fusion underlies neurotransmission in the nervous system. Here, the authors demonstrate how, in mammalian neurons, the synaptic protein tomosyn controls secretion by increasing the energy barrier for fusion.
RoboEM enables automated proofreading of electron microscopy datasets using a strategy akin to that of self-steering cars. This decreases the need for manual proofreading of segmented datasets and facilitates connectomic analyses.
How synaptic vesicles (SVs) are clustered at the presynapse is suggestive of anchoring processes counteracting their diffusion. Here, the authors co-track recycling and reserve SVs in live neurons to find that Synapsin 2a tetramerization dynamically immobilizes reserve SVs at the presynapse.
RoboEM, an artificial intelligence (AI)-based flight agent, automatically steers through three-dimensional electron microscopy (3D-EM) images of brain tissue to follow neurites. RoboEM substantially improves state-of-the-art automated reconstructions, eliminating manual proofreading needs in complex connectomic analysis problems and paving the way for high-throughput, cost-effective, large-scale mapping of neuronal networks — connectomes.
Following synaptic vesicle exocytosis, synaptotagmin 1 recruits a lipid signalling pathway within the presynaptic plasma membrane that drives local dynamin recruitment and membrane retrieval by endocytosis, thus maintaining membrane homeostasis.
A co-released inhibitory neurotransmitter and stimulatory neuropeptide are shown to act on different timescales to enhance circuit output and optimize behaviour.
We developed, characterized and validated nLight sensors, a new family of genetically encoded green and red fluorescent norepinephrine indicators based on an alpha-1 adrenergic receptor. nLight probes can detect norepinephrine in living animals with superior sensitivity, ligand specificity and temporal resolution as compared with previous tools.