More than a FAD: The In Vivo Effects of Disease-Linked Presenilin-1 Mutations
نویسندگان
چکیده
Mutations in presenilins are linked to familial autosomal dominant Alzheimer's disease. In this issue of Neuron, Xia et al. (2015) show that a disease-linked mutation leads to loss of γ-secretase function, cognitive decline, and neurodegeneration when knocked into the mouse genome.
منابع مشابه
Accelerated Amyloid Deposition in the Brains of Transgenic Mice Coexpressing Mutant Presenilin 1 and Amyloid Precursor Proteins
Missense mutations in two related genes, termed presenilin 1 (PS1) and presenilin 2 (PS2), cause dementia in a subset of early-onset familial Alzheimer's disease (FAD) pedigrees. In a variety of experimental in vitro and in vivo settings, FAD-linked presenilin variants influence the processing of the amyloid precursor protein (APP), leading to elevated levels of the highly fibrillogenic Abeta1-...
متن کاملFamilial Alzheimer disease-linked mutations specifically disrupt Ca2+ leak function of presenilin 1.
Mutations in presenilins are responsible for approximately 40% of all early-onset familial Alzheimer disease (FAD) cases in which a genetic cause has been identified. In addition, a number of mutations in presenilin-1 (PS1) have been suggested to be associated with the occurrence of frontal temporal dementia (FTD). Presenilins are highly conserved transmembrane proteins that support cleavage of...
متن کاملModeling Clinically Heterogeneous Presenilin Mutations with Transgenic Drosophila
To assess the potential of Drosophila to analyze clinically graded aspects of human disease, we developed a transgenic fly model to characterize Presenilin (PS) gene mutations that cause early-onset familial Alzheimer's disease (FAD). FAD exhibits a wide range in severity defined by ages of onset from 24 to 65 years . PS FAD mutants have been analyzed in mammalian cell culture, but conflicting ...
متن کاملPresenilin mutations in familial Alzheimer disease and transgenic mouse models accelerate neuronal lysosomal pathology.
The neuronal lysosomal system is a major degradative pathway, induced by cell stress and closely linked to Alzheimer disease (AD) and other neurodegenerative diseases. Here, we show that mutations of presenilin (PS) 1 and 2, which cause familial early-onset AD (FAD), induce more severe lysosomal system neuropathology in humans than does sporadic AD (SAD). Cathepsin D and B levels were higher in...
متن کاملPresenilins in synaptic function and disease.
The presenilin genes harbor approximately 90% of mutations linked to early-onset familial Alzheimer's disease (FAD), but how these mutations cause the disease is still being debated. Genetic analysis in Drosophila and mice demonstrate that presenilin plays essential roles in synaptic function, learning and memory, as well as neuronal survival in the adult brain, and the FAD-linked mutations alt...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
- Neuron
دوره 85 شماره
صفحات -
تاریخ انتشار 2015