کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
3069773 1580701 2010 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enhanced dentate gyrus synaptic plasticity but reduced neurogenesis in a mouse model of amyloidosis
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی عصب شناسی
پیش نمایش صفحه اول مقاله
Enhanced dentate gyrus synaptic plasticity but reduced neurogenesis in a mouse model of amyloidosis
چکیده انگلیسی

Long-term potentiation (LTP) and neurogenesis in the dentate gyrus (DG) are correlated forms of hippocampal plasticity which share, under physiological conditions, common regulatory mechanisms. In Alzheimer's disease (AD), their alterations are potentially associated with the early cellular pathology and cognitive decline. We analyzed DG LTP and neurogenesis in B6.152H mice, an amyloid precursor protein and presenilin 2 double-transgenic mouse model of amyloidosis and observed that DG LTP was strongly enhanced before and after amyloid plaque formation. Whereas proliferation of DG neuronal progenitor cells was unchanged, survival of newborn neurons was strongly decreased already before plaque formation. As similar alteration of neurogenesis was observed in PS2APP mice without changes in DG LTP (Richards et al. 2003), this study suggests that enhanced synaptic plasticity did not rescue impaired neurogenesis, and supports decreased survival of newborn neurons as an early event associated with AD detectable even before plaque formation.

Research Highlights
► 1. Novel hyperexcitation phenotype for an Alzheimer mouse model
► 2. Presenilin overexpression levels trigger LTP increase
► 3. Disconnect between plasticity and neurogenesis supports pathological mode of action
► 4. New mouse model of synaptic dysfunction in Alzheimer's Disease

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Neurobiology of Disease - Volume 40, Issue 2, November 2010, Pages 386–393
نویسندگان
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