Publication Date:
2010-11-30
Description:
Amyloid-beta oligomers may cause cognitive deficits in Alzheimer's disease by impairing neuronal NMDA-type glutamate receptors, whose function is regulated by the receptor tyrosine kinase EphB2. Here we show that amyloid-beta oligomers bind to the fibronectin repeats domain of EphB2 and trigger EphB2 degradation in the proteasome. To determine the pathogenic importance of EphB2 depletions in Alzheimer's disease and related models, we used lentiviral constructs to reduce or increase neuronal expression of EphB2 in memory centres of the mouse brain. In nontransgenic mice, knockdown of EphB2 mediated by short hairpin RNA reduced NMDA receptor currents and impaired long-term potentiation in the dentate gyrus, which are important for memory formation. Increasing EphB2 expression in the dentate gyrus of human amyloid precursor protein transgenic mice reversed deficits in NMDA receptor-dependent long-term potentiation and memory impairments. Thus, depletion of EphB2 is critical in amyloid-beta-induced neuronal dysfunction. Increasing EphB2 levels or function could be beneficial in Alzheimer's disease.〈br /〉〈br /〉〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3030448/" target="_blank"〉〈img src="https://static.pubmed.gov/portal/portal3rc.fcgi/4089621/img/3977009" border="0"〉〈/a〉 〈a href="https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3030448/" target="_blank"〉This paper as free author manuscript - peer-reviewed and accepted for publication〈/a〉〈br /〉〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Cisse, Moustapha -- Halabisky, Brian -- Harris, Julie -- Devidze, Nino -- Dubal, Dena B -- Sun, Binggui -- Orr, Anna -- Lotz, Gregor -- Kim, Daniel H -- Hamto, Patricia -- Ho, Kaitlyn -- Yu, Gui-Qiu -- Mucke, Lennart -- AG011385/AG/NIA NIH HHS/ -- AG022074/AG/NIA NIH HHS/ -- K08 AG034531/AG/NIA NIH HHS/ -- NS041787/NS/NINDS NIH HHS/ -- P01 AG022074/AG/NIA NIH HHS/ -- P01 AG022074-09/AG/NIA NIH HHS/ -- R01 AG011385/AG/NIA NIH HHS/ -- R01 AG011385-08/AG/NIA NIH HHS/ -- R01 NS041787/NS/NINDS NIH HHS/ -- R01 NS041787-09/NS/NINDS NIH HHS/ -- RR18928-01/RR/NCRR NIH HHS/ -- England -- Nature. 2011 Jan 6;469(7328):47-52. doi: 10.1038/nature09635. Epub 2010 Nov 28.〈br /〉〈span class="detail_caption"〉Author address: 〈/span〉Gladstone Institute of Neurological Disease, San Francisco, California 94158, USA.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/21113149" target="_blank"〉PubMed〈/a〉
Keywords:
Alzheimer Disease/*physiopathology/*therapy
;
Amyloid beta-Peptides/metabolism
;
Animals
;
Cell Line
;
Cells, Cultured
;
Cognition/*physiology
;
Dentate Gyrus/metabolism
;
Disease Models, Animal
;
Humans
;
Long-Term Potentiation
;
Memory/physiology
;
Mice
;
Mice, Transgenic
;
Neuronal Plasticity
;
Proteasome Endopeptidase Complex/metabolism
;
Protein Binding
;
Protein Structure, Tertiary
;
Rats
;
Receptor, EphB2/chemistry/*deficiency/genetics/*metabolism
;
Receptors, N-Methyl-D-Aspartate/metabolism
;
Synapses/metabolism
Print ISSN:
0028-0836
Electronic ISSN:
1476-4687
Topics:
Biology
,
Chemistry and Pharmacology
,
Medicine
,
Natural Sciences in General
,
Physics
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