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The accumulation of amyloid-β (Aβ) as amyloid fibrils and toxic oligomers is an important step in the development of Alzheimer’s disease (AD). However, there are numerous potentially toxic oligomers and little is known about their neurological effects when generated in the living brain. Here we show that Aβ oligomers can be assigned to one of at least two classes (type 1 and type 2) based on their...
The microtubule-associated protein tau accumulates in Alzheimer's and other fatal dementias, which manifest when forebrain neurons die. Recent advances in understanding these disorders indicate that brain dysfunction precedes neurodegeneration, but the role of tau is unclear. Here, we show that early tau-related deficits develop not from the loss of synapses or neurons, but rather as a result of synaptic...
The most widely used mouse model of Alzheimer's disease is the Tg2576 (APP SWE ) model. While general agreement about their neuropathology prevails, disparate results concerning cognitive changes have been reported. To resolve this controversy, we combined Morris water maze data collected over >10 years to determine the extent of memory impairment. APP SWE mice exhibited an age-dependent...
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