کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3070574 1580733 2008 15 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Gene–environment interactions modulating cognitive function and molecular correlates of synaptic plasticity in Huntington’s disease transgenic mice
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی عصب شناسی
پیش نمایش صفحه اول مقاله
Gene–environment interactions modulating cognitive function and molecular correlates of synaptic plasticity in Huntington’s disease transgenic mice
چکیده انگلیسی

Huntington’s disease (HD) is a fatal neurodegenerative disorder characterized by motor, cognitive and psychiatric symptoms. Here, we show that R6/1 (HD) mice have deficits in short-term hippocampal-dependent memory prior to onset of motor symptoms. HD mice also exhibit impaired performance on a test of long-term spatial memory, however, environmental enrichment enhanced spatial learning and significantly ameliorated this memory deficit in HD mice. Analysis of the presynaptic vesicle protein synaptophysin showed no differences between standard-housed wild-type and HD littermates, however, enrichment increased synaptophysin levels in the frontal cortex and hippocampus in both groups. In comparison, analysis of postsynaptic proteins revealed that HD animals show decreased levels of PSD-95 and GluR1, but no change in levels of gephyrin. Furthermore, at 12 weeks of age when we observe a beneficial effect of enrichment on spatial learning in HD mice, enrichment also delays the onset of a deficit in hippocampal PSD-95 levels. Our results show that cognitive deficits in HD mice can be ameliorated by environmental enrichment and suggest that changes in synaptic composition may contribute to the cognitive alterations observed.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neurobiology of Disease - Volume 29, Issue 3, March 2008, Pages 490–504
نویسندگان
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