behavior/neurological
• mice exhibit a behavioral flexibility deficit in bowl reversal test
• mice exhibit increased latency to choose between two odors in single discrimination reversal trials
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• memory impairment is observed in the eight-arm radial win-shift delayed non-match to sample (DNMTS) maze
• impaired acquisition of task is observed in the DNMTS T-maze; controls reach preset criterion more quickly than transgenic mice
• performance deficit in the T maze exists in the presence or absence of doxycycline
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homeostasis/metabolism
• increase in dopamine levels
• decrease in dopamine turnover as determined by DOPAC:DA and HVA:DA ratios
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• decrease in basal metabolic activity in the caudate putamen as measured by glucose uptake
• increase in activity in primary motor and somatosensory cortices
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