scholarly journals Functionally heterogeneous synaptic vesicle pools support diverse synaptic signalling

2015 ◽  
Vol 594 (4) ◽  
pp. 825-835 ◽  
Author(s):  
Simon Chamberland ◽  
Katalin Tóth

2005 ◽  
Vol 51 (4) ◽  
pp. 435-443 ◽  
Author(s):  
Susumu Kumashiro ◽  
Yun-Fei Lu ◽  
Kazuhito Tomizawa ◽  
Masayuki Matsushita ◽  
Fan-Yan Wei ◽  
...  




2020 ◽  
Author(s):  
Camila Pulido ◽  
Timothy Aidan Ryan

The human brain is a uniquely vulnerable organ as interruption in fuel supply leads to acute cognitive impairment on rapid time scales. The reasons for this vulnerability are not well understood, but nerve terminals are likely loci of this vulnerability as they do not store sufficient ATP molecules and must synthesize them on-demand during activity or suffer acute degradation in performance. The requirements for on-demand ATP synthesis however depends in part on the magnitude of resting metabolic rates. We show here that, at rest, synaptic vesicle (SV) pools are a major source of presynaptic basal energy consumption. This basal metabolism arises from SV-resident V-ATPases compensating for a hidden resting H+ efflux from the SV lumen. We show that this steady-state H+ efflux is 1) mediated by vesicular neurotransmitter transporters, 2) independent of the SV cycle, 3) accounts for ~half of the resting synaptic energy consumption and 4) contributes to nerve terminal intolerance of fuel deprivation.



2021 ◽  
Vol 7 (49) ◽  
Author(s):  
Camila Pulido ◽  
Timothy A. Ryan


2001 ◽  
Vol 21 (12) ◽  
pp. 4195-4206 ◽  
Author(s):  
Yann Humeau ◽  
Frédéric Doussau ◽  
Francesco Vitiello ◽  
Paul Greengard ◽  
Fabio Benfenati ◽  
...  


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