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Dopaminergic neuronal loss and motor deficits in Caenorhabditis elegans overexpressing human α‐synuclein
Author(s) -
Lakso Merja,
Vartiainen Suvi,
Moilanen AnuMaarit,
Sirviö Jouni,
Thomas James H.,
Nass Richard,
Blakely Randy D.,
Wong Garry
Publication year - 2003
Publication title -
journal of neurochemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.75
H-Index - 229
eISSN - 1471-4159
pISSN - 0022-3042
DOI - 10.1046/j.1471-4159.2003.01809.x
Subject(s) - caenorhabditis elegans , dopaminergic , biology , transgene , neuron , motor neuron , neuroscience , alpha synuclein , genetically modified mouse , dopamine , parkinson's disease , microbiology and biotechnology , gene , medicine , genetics , disease , spinal cord
Overexpression of human α‐synuclein in model systems, including cultured neurons, drosophila and mice, leads to biochemical and pathological changes that mimic synucleopathies including Parkinson's disease. We have overexpressed both wild‐type (WT) and mutant alanine53→threonine (A53T) human α‐synuclein by transgenic injection into Caenorhabditis elegans . Motor deficits were observed when either WT or A53T α‐synuclein was overexpressed with a pan‐neuronal or motor neuron promoter. Neuronal and dendritic loss were accelerated in all three sets of C. elegans dopaminergic neurons when human α‐synuclein was overexpressed under the control of a dopaminergic neuron or pan‐neuronal promoter, but not with a motor neuron promoter. There were no significant differences in neuronal loss between overexpressed WT and A53T forms or between worms of different ages (4 days, 10 days or 2 weeks). These results demonstrate neuronal and behavioral perturbations elicited by human α‐synuclein in C. elegans that are dependent upon expression in specific neuron subtypes. This transgenic model in C. elegans , an invertebrate organism with excellent experimental resources for further genetic manipulation, may help facilitate dissection of pathophysiologic mechanisms of various synucleopathies.