How neurosecretory vesicles release their cargo.
Neurons and related cell types often contain two major classes of neurosecretory vesicles, synaptic vesicles (SVs) and dense-core granules (DCGs), which store and release distinct cargo. SVs store and release classic neurotransmitters, which facilitate propagation of action potentials across the synaptic cleft, whereas DCGs transport, store, and release hormones, proteins, and neuropeptides, which facilitate neuronal survival, synaptic transmission, and learning. Over the past few years, there has been a major surge in our understanding of many of the key molecular mechanisms underlying cargo release from SVs and DCGs. This surge has been driven largely by the use of fluorescence microscopy (especially total internal reflection fluorescence microscopy) to visualize SVs or DCGs in living cells. This review highlights some of the recent insights into cargo release from neurosecretory vesicles provided by fluorescence microscopy, with emphasis on DCGs.
Scalettar
Bethe A
BA
Department of Physics, Lewis & Clark College, Portland, OR 97219, USA. bethe@lclark.edu
D000818:Animals; D001370:Axonal Transport / Q000502:physiology; D005089:Exocytosis / Q000502:physiology*; D006801:Humans; D008856:Microscopy, Fluorescence / Q000295:instrumentation / Q000379:methods / Q000639:trends; D009489:Neurosecretion / Q000502:physiology*; D009490:Neurosecretory Systems / Q000378:metabolism; D018377:Neurotransmitter Agents / Q000378:metabolism; D017729:Presynaptic Terminals / Q000378:metabolism*; D022142:Secretory Vesicles / Q000378:metabolism*; D009435:Synaptic Transmission / Q000502:physiology; D013572:Synaptic Vesicles / Q000378:metabolism*
D018377:Neurotransmitter Agents