The synaptic vesicle protein CSP alpha prevents presynaptic degeneration.

Abstract:

:Cysteine string protein alpha (CSPalpha)--an abundant synaptic vesicle protein that contains a DNA-J domain characteristic of Hsp40 chaperones--is thought to regulate Ca2+ channels and/or synaptic vesicle exocytosis. We now show that, in young mice, deletion of CSPalpha does not impair survival and causes no significant changes in presynaptic Ca2+ currents or synaptic vesicle exocytosis as measured in the Calyx of Held synapse. At 2-4 weeks of age, however, CSPalpha-deficient mice develop a progressive, fatal sensorimotor disorder. The neuromuscular junctions and Calyx synapses of CSPalpha-deficient mice exhibit increasing neurodegenerative changes, synaptic transmission becomes severely impaired, and the mutant mice die at approximately 2 months of age. Our data suggest that CSPalpha is not essential for the normal operation of Ca2+ channels or exocytosis but acts as a presynaptic chaperone that maintains continued synaptic function, raising the possibility that enhanced CSPalpha function could attenuate neurodegenerative diseases.

journal_name

Neuron

journal_title

Neuron

authors

Fernández-Chacón R,Wölfel M,Nishimune H,Tabares L,Schmitz F,Castellano-Muñoz M,Rosenmund C,Montesinos ML,Sanes JR,Schneggenburger R,Südhof TC

doi

10.1016/s0896-6273(04)00190-4

subject

Has Abstract

pub_date

2004-04-22 00:00:00

pages

237-51

issue

2

eissn

0896-6273

issn

1097-4199

pii

S0896627304001904

journal_volume

42

pub_type

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