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
Neuronjournal_title
Neuronauthors
Fernández-Chacón R,Wölfel M,Nishimune H,Tabares L,Schmitz F,Castellano-Muñoz M,Rosenmund C,Montesinos ML,Sanes JR,Schneggenburger R,Südhof TCdoi
10.1016/s0896-6273(04)00190-4subject
Has Abstractpub_date
2004-04-22 00:00:00pages
237-51issue
2eissn
0896-6273issn
1097-4199pii
S0896627304001904journal_volume
42pub_type
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