نتایج جستجو برای: aβ1
تعداد نتایج: 893 فیلتر نتایج به سال:
OBJECTIVE To compare the predictive accuracy of β-amyloid (Aβ)1-42 and total tau in CSF, hippocampal volume (HCV), and APOE genotype for Alzheimer disease (AD)-type dementia in subjects with amnestic mild cognitive impairment (aMCI) and nonamnestic mild cognitive impairment (naMCI). METHODS We selected 399 subjects with aMCI and 226 subjects with naMCI from a multicenter memory clinic-based c...
OBJECTIVE To determine whether cerebrospinal fluid (CSF) biomarkers for Alzheimer disease fluctuate significantly over time in a cohort of older, mildly symptomatic individuals. DESIGN Biomarker validation in a clinical cohort. SETTING University hospital inpatient unit. PARTICIPANTS Ten patients admitted for CSF drainage for diagnostic purposes. MAIN OUTCOME MEASURES The CSF levels of ...
Aberrant increases in neuronal network excitability may contribute to the cognitive deficits in Alzheimer's disease (AD). However, the mechanisms underlying hyperexcitability are not fully understood. Such overexcitation of neuronal networks has been detected in the brains of APP/PS1 mice. In the present study, using current-clamp recording techniques, we observed that 12 days in vitro (DIV) pr...
Alzheimer's disease (AD) is the most common form of dementia, with no disease-modifying treatment yet available. Early detection of patients at risk of developing AD is of central importance. Blood-based genetic signatures can serve as early detection and as population-based screening tools. In this study, we aimed to identify genetic markers and gene signatures associated with cerebrospinal fl...
We developed a novel therapeutic strategy for Alzheimer's disease (AD) exploiting the properties of a natural variant of Amyloid-β (Aβ) carrying the A2V substitution, which protects heterozygous carriers from AD by its ability to interact with wild-type Aβ, hindering conformational changes and assembly thereof. As prototypic compound we designed a six-mer mutated peptide (Aβ1-6A2V), linked to t...
Alzheimer's disease is the most fatal neurodegenerative disorder characterized by the aggregation and deposition of Amyloid β (Aβ) oligomers in the brain of patients. Two principal variants of Aβ exist in humans: Aβ1-40 and Aβ1-42. The former is the most abundant in the plaques, while the latter is the most toxic species and forms fibrils more rapidly. Interestingly, fibrils of Aβ1-40 peptides ...
IMPORTANCE Cerebrospinal fluid (CSF) and positron emission tomographic (PET) amyloid biomarkers have been proposed for the detection of Alzheimer disease (AD) pathology in living patients and for the tracking of longitudinal changes, but the relation between biomarkers needs further study. OBJECTIVE To determine the association between CSF and PET amyloid biomarkers (cross-sectional and longi...
Reduced levels of naturally occurring autoantibodies against amyloid-β (Aβ) have been described in Alzheimer's disease (AD). Lifetime depression doubles the risk of AD, thus these autoantibodies may also be reduced in this group. We measured serum IgG autoantibody titers against Aβ1-42, S100b and α-synuclein in 214 individuals with depression and 419 controls. Titers against Aβ1-42 were lower i...
There is a growing interest in identifying natural food ingredients that may serve to prevent dementia such as that due to Alzheimer disease (AD). Peptides derived from food proteins have been demonstrated to have various physiological activities such as a hypotensive action. Recent findings have indicated possible associations of hypertension with AD progression, and suggest that angiotensin c...
سابقه و هدف: هدف از تحقیق حاضر بررسی اثر 8 هفته تمرین هوازی بر سطوح آمیلوئید بتا 42 (aβ 1-42)، نپریلیزین و γ-سکرتاز هیپوکامپ موش های نر مدل آلزایمری با تزریق هوموسیستئین بود. مواد و روش ها: بدین منظور 50 سر موش صحرایی نر (سن 12 هفته) در 5 گروه آلزایمر کنترل، آلزایمر تمرین، سالم کنترل، سالم تمرین و شم قرار داده شدند. برای القای آلزایمر، از تزریق هوموسیستئین با دوز 6/0 مولار به درون بطن مغز موش ه...
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