A Database of Drosophila Genes & Genomes

FB2013_03, released May 7th, 2013
 

Allele Hsap\SNCAScer\UAS.cTa

General Information
SymbolHsap\SNCAScer\UAS.cTaSpeciesH. sapiens
NameFlyBase IDFBal0277666
Feature typealleleAssociated geneHsap\SNCA
Allele class
Mutagenin vitro construct - regulatory fusion
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Description
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FB2013_03
FB2013_02
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Allele class
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Mutations Mapped to the Genome
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Protein sequence
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Scer\UAS regulatory sequences are cloned upstream of Hsap\SNCA coding sequences.
Carried in construct
Cytology
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Statement
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Expression of Hsap\SNCA[Scer\UAS.cTa] under the control of Scer\GAL4[elav.PLu] or Scer\GAL4[ple.PF] causes age-dependent defects in the negative geotaxis response (i.e. the innate tendency to walk upwards after being tapped to the bottom of their containing vial). Brains from aged Hsap\SNCA[Scer\UAS.cTa]-expressing flies exhibit an average loss of 1.5-2 neurons per PPL1 cluster, relative to age-matched controls.
One-day old flies expressing two copies of Hsap\SNCA[Scer\UAS.cTa] under the control of two copies of Scer\GAL4[ple.PF] do not exhibit a loss of ple-positive neurons, relative to controls. In contrast, 20-day old flies carrying two copies of Hsap\SNCA[Scer\UAS.cTa] and two copies of Scer\GAL4[ple.PF] exhibit a statistically significant reduction in the number of ple-positive neurons in the protocerebral posterior lateral 1 (PPL1) cluster, relative to wild-type controls. Neuronal loss is not detected in flies bearing one or two copies of Hsap\SNCA[Scer\UAS.cTa] and Scer\GAL4[elav.PLu] at 20 or more days of age. Feeding sulforaphane or allyl disulfide to flies expressing Hsap\SNCA[Scer\UAS.cTa] under the control of Scer\GAL4[ple.PF] suppresses DA neuron loss.
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Co-expression of cnc[Scer\UAS.cSa] with Hsap\SNCA[Scer\UAS.cTa] (specifically at 2-5 days after eclosion), under the control of Scer\GAL4[ple.PF], prevents the deficit in locomotor performance induced by Hsap\SNCA[Scer\UAS.cTa] expression. Expression of cnc[Scer\UAS.cSa] at 25[o]C 2-5 days after eclosion has no effect on the age-associated decline in negative geotaxis found in flies expressing Hsap\SNCA[Scer\UAS.cTa] under the control of Scer\GAL4[ple.PF]. Flies expressing Hsap\SNCA[Scer\UAS.cTa] under the control of Scer\GAL4[ple.PF] in a Keap1[EY5]/+ background display locomotor activity similar to that of wild-type flies, indicating that the Keap1[EY5]/+ background suppresses the age-dependent decay in negative geotaxis response found in Hsap\SNCA[Scer\UAS.cTa]-expressing flies. A Keap1[EY5]/+ background, the neuron loss experienced in PPL1 clusters upon expression of Hsap\SNCA[Scer\UAS.cTa] under the control of Scer\GAL4[ple.PF] is restored to wild-type levels. Flies co-expressing Hsap\SNCA[Scer\UAS.cTa] and Keap1[dsRNA.Scer\UAS] under the control of Scer\GAL4[ple.PF] display locomotor activity similar to that of wild-type flies, indicating suppression of the age-dependent negative geotaxis response found in Hsap\SNCA[Scer\UAS.cTa]-expressing flies. Co-expression of maf-S[Scer\UAS.T:Ivir\HA1] with Hsap\SNCA[Scer\UAS.cTa], both under the control of Scer\GAL4[ple.PF], suppresses the age-dependent defects in negative geotaxis. Co-expression of maf-S[Scer\UAS.T:Ivir\HA1] in flies expressing Hsap\SNCA[Scer\UAS.cTa] under the control of Scer\GAL4[ple.PF], does not affect the number of PPL1 neurons in either young or old flies, but is sufficient to rescue the Hsap\SNCA-induced neurotoxicity in old flies.
A Df(3L)H99 background suppresses the neuronal loss seen upon expression of multiple copies of Hsap\SNCA[Scer\UAS.cTa] under the control of Scer\GAL4[ple.PF]. A GstS1[M26] mutant background enhances the DA neuron loss found in flies expressing Hsap\SNCA[Scer\UAS.cTa] under the control of Scer\GAL4[ple.PF]. Co-expression of GstS1[Scer\UAS.P\T.cWa] fully suppresses the neuronal loss observed in 2-day old flies expressing two copies of Hsap\SNCA[Scer\UAS.cTa] under the control of two copies of Scer\GAL4[ple.PF]. The decreased Gclm activity in Gclm[L0580] homozygotes is found to significantly enhance the DA neuron loss induced by expression of Hsap\SNCA[Scer\UAS.cTa] under the control of Scer\GAL4[ple.PF]. Expression of Gclm[Scer\UAS.cOa] completely rescues the neuronal loss induced by Hsap\SNCA[Scer\UAS.cTa] expression in 20- and 30-day old flies.
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Reported As
Symbol Synonym
Hsap\SNCAScer\UAS.cTa
 
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hide References ( 2 )
Research paper
Barone et al., 2011, Dis. Model Mech. 4(5): 701--707
Genetic activation of Nrf2 signaling is sufficient to ameliorate neurodegenerative phenotypes in a Drosophila model of Parkinson's disease. [FBrf0215025]
Trinh et al., 2008, J. Neurosci. 28(2): 465--472
Induction of the phase II detoxification pathway suppresses neuron loss in Drosophila models of Parkinson's disease. [FBrf0202781]