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@ARTICLE{Hoffmann:255148,
author = {Hoffmann, Sheila and Orlando, Marta and Andrzejak, Ewa and
Trimbuch, Thorsten and Rosenmund, Christian and Ackermann,
Frauke and Garner, Craig C.},
title = {{L}ight induced synaptic vesicle autophagy},
reportid = {DZNE-2023-00264},
year = {2018},
abstract = {The regulated turnover of synaptic vesicle (SV) proteins is
thought to involve the ubiquitin dependent tagging and
degradation through endo-lysosomal and autophagy pathways.
Yet, it remains unclear which of these pathways are used,
when they become activated and whether SVs are cleared
en-mass together with SV proteins or whether both are
degraded selectively. Equally puzzling is how quickly these
systems can be activated and whether they function in real
time to support synaptic health. To address these questions,
we have developed an imaging based system that
simultaneously tags presynaptic proteins while monitoring
autophagy. Moreover, by tagging SV proteins with a light
activated reactive oxygen species (ROS) generator,
Supernova, it was possible to temporally control the damage
to specific SV proteins and assess their consequence to
autophagy mediated clearance mechanisms and synaptic
function. Our results show that, in mouse hippocampal
neurons, presynaptic autophagy can be induced in as little
as 5-10 minutes and eliminates primarily the damaged protein
rather than the SV en-mass. Importantly, we also find that
autophagy is essential for synaptic function, as
light-induced damage to e.g. Synaptophysin only compromises
synaptic function when autophagy is simultaneously blocked.
These data support the concept that presynaptic boutons have
a robust highly regulated clearance system to maintain not
only synapse integrity, but also synaptic function.},
cin = {AG Garner / AG Ackermann},
cid = {I:(DE-2719)1810001 / I:(DE-2719)1813004},
pnm = {899 - ohne Topic (POF4-899)},
pid = {G:(DE-HGF)POF4-899},
typ = {PUB:(DE-HGF)25},
doi = {10.1101/440719},
url = {https://pub.dzne.de/record/255148},
}