Abstract:
:Posterior cingulate cortex (PCC) accumulates amyloid-β (Aβ) early in Alzheimer's disease (AD). The relative concentrations of full-length Aβ and truncated, pyroglutamate-modified Aβ (NpE3) forms, and their correlations to cognitive dysfunction in AD, are unknown. We quantified AβNpE3-42, AβNpE3-40, Aβ1-42, and Aβ1-40 concentrations in soluble (nonfibrillar) and insoluble (fibrillar) pools in PCC from subjects with an antemortem clinical diagnosis of no cognitive impairment, mild cognitive impairment, or mild-moderate AD. In clinical AD, increased PCC concentrations of Aβ were observed for all Aβ forms in the insoluble pool but only for Aβ1-42 in the soluble pool. Lower Mini-Mental State Exam and episodic memory scores correlated most strongly with higher concentrations of soluble and insoluble Aβ1-42. Greater neuropathology severity by Consortium to Establish a Registry for Alzheimer's Disease and National Institute on Aging-Reagan pathologic criteria was associated with higher concentrations of all measured Aβ forms, except soluble AβNpE3-40. Low concentrations of soluble pyroglutamate Aβ across clinical groups likely reflect its rapid sequestration into plaques, thus, the conversion to fibrillar Aβ may be a therapeutic target.
journal_name
Neurobiol Agingjournal_title
Neurobiology of agingauthors
Pivtoraiko VN,Abrahamson EE,Leurgans SE,DeKosky ST,Mufson EJ,Ikonomovic MDdoi
10.1016/j.neurobiolaging.2014.06.021subject
Has Abstractpub_date
2015-01-01 00:00:00pages
12-9issue
1eissn
0197-4580issn
1558-1497pii
S0197-4580(14)00454-0journal_volume
36pub_type
杂志文章abstract::Inflammation in the aging brain increases risk for neurodegenerative disease. In humans, the regulator of G-protein signaling-10 (RGS10) locus has been associated with age-related maculopathy. Chronic peripheral administration of lipopolysaccharide in the RGS10-null mice induces nigral dopaminergic (DA) degeneration, ...
journal_title:Neurobiology of aging
pub_type: 杂志文章
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abstract::Middle-aged and aged rats received dorsal hippocampal lesions before performance was evaluated on the radial-arm maze. The maze task contained simultaneous spatial working memory and visually cued reference memory components. Both middle-aged and aged rats that received lesions committed more errors of both types than...
journal_title:Neurobiology of aging
pub_type: 杂志文章
doi:10.1016/s0197-4580(99)00047-0
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abstract::The aim of this study was to estimate the number of new cells and neurons added to the dentate gyrus across the lifespan, and to compare the rate of age-associated decline in neurogenesis across species. Data from mice (Mus musculus), rats (Rattus norvegicus), lesser hedgehog tenrecs (Echinops telfairi), macaques (Mac...
journal_title:Neurobiology of aging
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doi:10.1016/j.neurobiolaging.2011.03.008
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abstract::Plaques found in the brains of patients suffering from Alzheimer's disease (AD) mainly consist of beta-amyloid (Abeta), which is produced by sequential cleaving of amyloid precursor protein (APP) by two proteolytic enzymes, beta- and gamma-secretases. Any change in the fine balance between these enzymes and their subs...
journal_title:Neurobiology of aging
pub_type: 杂志文章
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abstract::C9orf72 repeat expansions are a common cause of amyotrophic lateral sclerosis and frontotemporal dementia. To date, no large-scale study of dementia with Lewy bodies (DLB) has been undertaken to assess the role of C9orf72 repeat expansions in the disease. Here, we investigated the prevalence of C9orf72 repeat expansio...
journal_title:Neurobiology of aging
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doi:10.1016/j.neurobiolaging.2016.08.023
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abstract::Alzheimer's disease (AD) has been suggested to be a systemic disease, and signal transduction abnormalities have been reported in non-neuronal AD cells. We have previously quantified the protein kinase C (PKC) subtypes in AD and control brains using a two-site enzyme immunoassay (EIA), and have shown that type II PKC ...
journal_title:Neurobiology of aging
pub_type: 杂志文章
doi:10.1016/0197-4580(94)90047-7
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abstract::Compared to young rats, old age increases susceptibility and caloric restriction decreases susceptibility for the loss of retinal ganglion cells and displaced amacrine cells following retinal ischemia/reperfusion. In retinas of old animals before ischemia, reactive gliosis, including activation of Muller cells, microg...
journal_title:Neurobiology of aging
pub_type: 杂志文章
doi:10.1016/j.neurobiolaging.2003.07.005
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abstract::Visual short-term memory (vSTM) is a cognitive resource that declines with age. This study investigated whether electroencephalography (EEG) correlates of vSTM vary with cognitive development over individuals' lifespan. We measured vSTM performance and EEG in a lateralized whole-report task in a healthy birth cohort, ...
journal_title:Neurobiology of aging
pub_type: 杂志文章
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更新日期:2018-02-01 00:00:00
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journal_title:Neurobiology of aging
pub_type: 杂志文章
doi:10.1016/j.neurobiolaging.2011.11.005
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journal_title:Neurobiology of aging
pub_type: 杂志文章,meta分析,评审
doi:10.1016/j.neurobiolaging.2008.01.010
更新日期:2009-11-01 00:00:00
abstract::The knowledge base of nutrition and the brain is steadily expanding. Much of the research is aimed at ways to protect the brain from damage. In adults, the major causes of brain damage are aging and dementia. The most prominent dementia, and the condition that grabs the most public attention, is Alzheimer's disease. T...
journal_title:Neurobiology of aging
pub_type: 杂志文章,评审
doi:10.1016/j.neurobiolaging.2014.02.029
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abstract::An individual's genetic makeup plays an important role in determining susceptibility to cognitive aging. Identifying the specific genes that contribute to cognitive aging may aid in early diagnosis of at-risk patients, as well as identify novel therapeutics targets to treat or prevent development of symptoms. Challeng...
journal_title:Neurobiology of aging
pub_type: 杂志文章
doi:10.1016/j.neurobiolaging.2016.06.008
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journal_title:Neurobiology of aging
pub_type: 杂志文章,评审
doi:10.1016/s0197-4580(99)00095-0
更新日期:1999-09-01 00:00:00
abstract::Flexible instrumental learning is required to harness the appropriate behaviors to obtain rewards and to avoid punishments. The precise contribution of dopaminergic midbrain regions (substantia nigra/ventral tegmental area [SN/VTA]) to this form of behavioral adaptation remains unclear. Normal aging is associated with...
journal_title:Neurobiology of aging
pub_type: 杂志文章
doi:10.1016/j.neurobiolaging.2013.03.030
更新日期:2013-10-01 00:00:00
abstract::Alzheimer's disease (AD) is a late-onset and progressive neurodegenerative disorder characterized clinically by memory loss, impairment of other cognitive functions, and changes in behavior and personality. The overall aim of this review is to summarize recent advances in studies of AD progression and the use of anima...
journal_title:Neurobiology of aging
pub_type: 杂志文章,评审
doi:10.1016/j.neurobiolaging.2005.04.014
更新日期:2006-08-01 00:00:00
abstract::Cross-sectional studies show that elevated cerebral amyloid is associated with greater white-matter hyperintensity (WMH) burden in cognitively normal (CN) older adults. However, the relative time courses of amyloid and WMH accrual are unclear. To address this, we tested the associations between known WMH correlates-ag...
journal_title:Neurobiology of aging
pub_type: 杂志文章
doi:10.1016/j.neurobiolaging.2016.08.014
更新日期:2016-12-01 00:00:00
abstract::Diabetes may adversely affect cognitive function and, conversely, caloric restriction (CR) increases longevity and improves memory. To shed light on the unknown underlying mechanisms involved in these observations, we examined the effects of CR on serum metabolic parameters and hippocampal protein expression in the ob...
journal_title:Neurobiology of aging
pub_type: 杂志文章
doi:10.1016/j.neurobiolaging.2016.05.002
更新日期:2016-08-01 00:00:00
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journal_title:Neurobiology of aging
pub_type: 杂志文章
doi:10.1016/j.neurobiolaging.2004.06.015
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abstract::This study modeled predementia Alzheimer's disease clinical trials. Longitudinal data from cognitively normal (CN) and mild cognitive impairment (MCI) participants in the Alzheimer's Disease Neuroimaging Initiative were used to calculate sample size requirements for trials using outcome measures, including the Clinica...
journal_title:Neurobiology of aging
pub_type: 杂志文章
doi:10.1016/j.neurobiolaging.2012.03.006
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journal_title:Neurobiology of aging
pub_type: 杂志文章
doi:10.1016/0197-4580(87)90061-3
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journal_title:Neurobiology of aging
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journal_title:Neurobiology of aging
pub_type: 杂志文章
doi:10.1016/0197-4580(95)97327-d
更新日期:1995-05-01 00:00:00
abstract::Amyloid beta (A beta) immunization of amyloid precursor protein (APP)-transgenic (tg) mice with human A beta induces humoral immunity, however, the immune response to endogenous rodent A beta is unknown. Fourteen-month J20 APP-tg mice and non-tg littermates were immunized subcutaneously followed by chronic intranasal ...
journal_title:Neurobiology of aging
pub_type: 杂志文章
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journal_title:Neurobiology of aging
pub_type: 杂志文章
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abstract::Alzheimer's disease (AD) involves progressive neurodegeneration in the presence of misfolded proteins and poorly-understood inflammatory changes. However, research has shown that AD is genetically, clinically, and pathologically heterogeneous. In frozen brain samples of frontal cortex (diseased) and cerebellum (nondis...
journal_title:Neurobiology of aging
pub_type: 杂志文章
doi:10.1016/j.neurobiolaging.2012.09.012
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abstract::Decline in cerebrovascular health complicates brain aging, and development of cerebral microbleeds (CMBs) is one of its prominent indicators. In a large sample of healthy adults (N = 251, age 18-78 years at baseline, 70% women), the contributions of chronological age and vascular health indicators to the risk of devel...
journal_title:Neurobiology of aging
pub_type: 杂志文章
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abstract::Macrophages or activated microglia in the subretinal space are considered a hallmark of some retinal pathologies. We investigated the effects of age, pigmentation and CX(3)CR1 deficiency on the accumulation of macrophages/activated microglia in the outer retina of young and old Cx(3)cr1(gfp/gfp) (CX(3)CR1-deficient) o...
journal_title:Neurobiology of aging
pub_type: 杂志文章
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abstract::This paper describes regional brain energy metabolism, sensorimotor, and memory functions in mature (12 months) and old (24 months) C57BL/6 mice. Male mice were tested across a variety of sensorimotor procedures and in the Morris water maze before evaluating brain uptake of fluorodeoxyglucose (FDG) in the resting stat...
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