behavior/neurological
• mice exhibit decreased motor skill learning
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• mice exhibit an increase in the number of slips while traversing a mesh beam, indicating impaired balance and coordination
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• mice perform worse on the rotarod than wild-type mice or Tg(Prnp-HTRA2*G399S)1Olri mice from 6 months of age
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cellular
• increase in steady-state levels of heat shock protein 60, total ubiquitin and XIAP, indicating a cellular stress response
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• mitochondria consume less oxygen in response to ADP (lower state III respiration) and in response to the uncoupler carbonyl cyanide-4-(trifluoromethoxy)phenylhydrazone (maximal respiration) compared to wild-type mice, resulting in lower spare respiratory capacity
• reduction of Complex I activity
• mitochondrial membrane potential in cells isolated from brains is about 35% lower than in wild-type mice, although this is not statistically significant
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nervous system
• about 50% increase in the amount of cell death in the cerebellum
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• mice exhibit a reduction of tyrosine hydroxylase+ neurons (dopaminergic neurons)
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