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• W2751208840 abstract "During endocytosis, fused synaptic vesicles are retrieved at nerve terminals, allowing for vesicle recycling and thus the maintenance of synaptic transmission during repetitive nerve firing. Impaired endocytosis in pathological conditions leads to decreases in synaptic strength and brain functions. Here, we describe methods used to measure synaptic vesicle endocytosis at the mammalian hippocampal synapse in neuronal culture. We monitored synaptic vesicle protein endocytosis by fusing a synaptic vesicular membrane protein, including synaptophysin and VAMP2/synaptobrevin, at the vesicular lumenal side, with pHluorin, a pH-sensitive green fluorescent protein that increases its fluorescence intensity as the pH increases. During exocytosis, vesicular lumen pH increases, whereas during endocytosis vesicular lumen pH is re-acidified. Thus, an increase of pHluorin fluorescence intensity indicates fusion, whereas a decrease indicates endocytosis of the labelled synaptic vesicle protein. In addition to using the pHluorin imaging method to record endocytosis, we monitored vesicular membrane endocytosis by electron microscopy (EM) measurements of Horseradish peroxidase (HRP) uptake by vesicles. Finally, we monitored the formation of nerve terminal membrane pits at various times after high potassium-induced depolarization. The time course of HRP uptake and membrane pit formation indicates the time course of endocytosis." @default.
• W2751208840 created "2017-09-15" @default.
• W2751208840 creator A5030878771 @default.
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• W2751208840 date "2017-09-04" @default.
• W2751208840 modified "2023-10-12" @default.
• W2751208840 title "Measuring Synaptic Vesicle Endocytosis in Cultured Hippocampal Neurons" @default.
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• W2751208840 doi "https://doi.org/10.3791/55862" @default.
• W2751208840 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5614399" @default.
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