Abstract:
:Soluble amyloid beta (Abeta) oligomers might trigger early cognitive impairment in Alzheimer's Disease (AD) through the impairment of proper neuronal network function. We have recently shown that the short sequence Abeta(25-35) affects the spontaneous activity in hippocampal slices, when was added to the bath, at high nanomolar concentrations. In the present study, we aimed to characterize the effects of the oligomerized full length sequence Abeta(1-42) on the spontaneous network activity in the CA1 hippocampal area testing whether such effects are age dependent. By performing extracellular field recordings of spontaneous network activity of hippocampal slices, we found that an oligomerized solution of Abeta(1-42) (osAbeta) potently inhibit, in a dose-dependent manner, the spontaneous hippocampal network activity with an IC(50) of 0.4 +/- 3.2 nM and a maximal effect reached around 10 nM. While spontaneous hippocampal network activity is unaffected by age, the sensitivity of spontaneous hippocampal network activity to osAbeta (10 nM) appears to be increased in slices from older animals. Moreover, to see a significant reduction in spontaneous network activity in slices from animals in their second week of life 100nM osAbeta was needed. The osAbeta-induced reduction in hippocampal network activity is accompanied by a presynaptic reduction in both spontaneous and miniature synaptic potentials. Finally, we demonstrated that the effect produced by osAbeta on spontaneous network activity was specific, reversible and unrelated with cell death. In conclusion, our data show that osAbeta alters hippocampal network activity at concentrations commonly observed in AD patients and that such effect of osAbeta increase with age.
journal_name
Curr Alzheimer Resjournal_title
Current Alzheimer researchauthors
Balleza-Tapia H,Huanosta-Gutiérrez A,Márquez-Ramos A,Arias N,Peña Fdoi
10.2174/156720510791383859subject
Has Abstractpub_date
2010-08-01 00:00:00pages
453-62issue
5eissn
1567-2050issn
1875-5828pii
CAR -58journal_volume
7pub_type
杂志文章abstract::The currently available experimental data supports the hypothesis that the neuroprotective effect of dimebon is related to the protection of the brain-mitochondria from neurodegeneration. In this study, the influence of dimebon on mitochondria was investigated to gain a better understanding of the neuroprotective effe...
journal_title:Current Alzheimer research
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doi:10.2174/1567205011666140505094808
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journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
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journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
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更新日期:2016-01-01 00:00:00
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journal_title:Current Alzheimer research
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doi:10.2174/1567205015666180613113924
更新日期:2018-01-01 00:00:00
abstract::Features of autoimmunity have been associated with both Alzheimer's disease (AD) and with diabetes. In both diseases high levels of advanced glycation end products (AGEs) and their receptor (RAGE) have been detected in tissues and in the circulation. In addition high titers of antibodies directed against a RAGE-like p...
journal_title:Current Alzheimer research
pub_type: 杂志文章
doi:10.2174/156720506777632899
更新日期:2006-07-01 00:00:00
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journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
doi:10.2174/156720508786898424
更新日期:2008-12-01 00:00:00
abstract::Metabotropic glutamate receptor 5 (mGluR5) is highly expressed throughout the forebrain and hippocampus. Several lines of evidence support the role of this receptor in brain development and developmental disorders, as well as in neurodegenerative disorders like Alzheimer's disease (AD). In the present study, the expre...
journal_title:Current Alzheimer research
pub_type: 杂志文章
doi:10.2174/1567205011666140812115423
更新日期:2014-01-01 00:00:00
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journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
doi:10.2174/1567205013666160219112712
更新日期:2016-01-01 00:00:00
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journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
doi:10.2174/1567205014666170203095802
更新日期:2018-01-01 00:00:00
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journal_title:Current Alzheimer research
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doi:10.2174/1567205013666161201202520
更新日期:2017-01-01 00:00:00
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journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
doi:10.2174/15672050113109990132
更新日期:2013-07-01 00:00:00
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journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
doi:10.2174/1567205016666191023114015
更新日期:2019-01-01 00:00:00
abstract::Acetylcholinesterase (AChE) plays a crucial physiological role in termination of impulse transmission at cholinergic synapses through rapid hydrolysis of acetylcholine. In addition, it was implicated in amyloid plaque formation, a hallmark of Alzheimer's disease (AD), and most of the drugs used in AD treatment are ACh...
journal_title:Current Alzheimer research
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doi:10.2174/1567205053585909
更新日期:2005-04-01 00:00:00
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journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
doi:10.2174/156720509788929237
更新日期:2009-08-01 00:00:00
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journal_title:Current Alzheimer research
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doi:10.2174/1567205011666140110112608
更新日期:2014-02-01 00:00:00
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journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
doi:10.2174/156720509789207967
更新日期:2009-10-01 00:00:00
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journal_title:Current Alzheimer research
pub_type: 杂志文章
doi:10.2174/156720512804142921
更新日期:2012-12-01 00:00:00
abstract::Alzheimer's disease is a neurodegenerative disorder characterized by amyloid deposits and neurofibrillary tangles. Cholinergic dysfunction is also a main pathological feature of the disease. Nevertheless, the links between cholinergic dysfunction and neuropathological hallmarks of Alzheimer's are still unknown. In the...
journal_title:Current Alzheimer research
pub_type: 杂志文章
doi:10.2174/156720509787602843
更新日期:2009-04-01 00:00:00
abstract::Changes in rRNA and rDNA expression have been associated with cellular and organism aging and have been linked to Alzheimer's disease (AD) pathogenesis. In this study, we investigated the mRNA expression of ribosomal genes (28S/18S) and β-amyloid precursor protein (APP) in different post mortem brain tissue regions (t...
journal_title:Current Alzheimer research
pub_type: 杂志文章
doi:10.2174/1567205012666151027124017
更新日期:2015-01-01 00:00:00
abstract::Serum levels of β-amyloid (Aβ) peptides may represent an early biomarker in the diagnosis of Alzheimer's disease (AD). In the present study, we investigated the temporal kinetic changes in the levels of serum Aβ 1-42 and 40 in an amyloid precursor protein (APP)/presenilin (PS)1 double transgenic mouse model of AD. Ser...
journal_title:Current Alzheimer research
pub_type: 杂志文章
doi:10.2174/15672050113106660159
更新日期:2013-11-01 00:00:00
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journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
doi:10.2174/1567205013666160314145347
更新日期:2017-01-01 00:00:00
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journal_title:Current Alzheimer research
pub_type: 杂志文章
doi:10.2174/1567205016666190805155230
更新日期:2019-01-01 00:00:00
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journal_title:Current Alzheimer research
pub_type: 杂志文章
doi:
更新日期:2013-01-01 00:00:00
abstract:BACKGROUND:The design of new heterodimeric dual binding site acetylcholinesterase inhibitors constitutes the main goal-directed to the development of new anticholinesterase agents with the expanded pharmacological profile. Multi-target compounds are usually designed by combining in a hybrid molecule with two or more ph...
journal_title:Current Alzheimer research
pub_type: 杂志文章
doi:10.2174/1567205015666180711110750
更新日期:2018-01-01 00:00:00
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journal_title:Current Alzheimer research
pub_type: 杂志文章
doi:10.2174/156720511795745357
更新日期:2011-06-01 00:00:00
abstract:OBJECTIVE:Centrifuges are the principal means of generating physiological hypergravity and have been used for many medical purposes, including the therapy of psychiatric diseases and evaluation of vestibular system in the pilots. In particular, modern centrifuges have evolved into mechanically sophisticated precision i...
journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
doi:10.2174/1567205015666171229225501
更新日期:2018-01-01 00:00:00
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journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
doi:10.2174/156720506778249425
更新日期:2006-09-01 00:00:00
abstract::Alzheimer's disease (AD) is a progressive degenerative disorder of the brain and is the most common form of dementia. To-date no simple, inexpensive and minimally invasive procedure is available to confirm with certainty the early diagnosis of AD prior to the manifestations of symptoms characteristic of the disease. T...
journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
doi:10.2174/1567205011666140618103827
更新日期:2014-01-01 00:00:00
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journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
doi:10.2174/156720507781788873
更新日期:2007-09-01 00:00:00
abstract::Today, the most reliable diagnosis for Alzheimer's disease (AD) is the post mortem identification of amyloid plaques, consisting of the Amyloid-beta (Abeta) peptide, (and neurofibrillary tangles) in the brain of the patient. Great efforts are being made to identify reliable biomarkers for AD that are suitable for mini...
journal_title:Current Alzheimer research
pub_type: 杂志文章,评审
doi:10.2174/156720509788486536
更新日期:2009-06-01 00:00:00