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10.1002/ana.22313

http://scihub22266oqcxt.onion/10.1002/ana.22313
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C4071456!4071456!21472769
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suck abstract from ncbi


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pmid21472769      Ann+Neurol 2011 ; 69 (5): 819-30
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  • Endogenous Amyloid-? is Necessary for Hippocampal Synaptic Plasticity and Memory #MMPMID21472769
  • Puzzo D; Privitera L; Fa' M; Staniszewski A; Hashimoto G; Aziz F; Sakurai M; Ribe EM; Troy CM; Mercken M; Jung SS; Palmeri A; Arancio O
  • Ann Neurol 2011[May]; 69 (5): 819-30 PMID21472769show ga
  • Objective: The goal of this study was to investigate the role of endogenous amyloid-? peptide (A?) in healthy brain. Methods: Long-term potentiation (LTP), a type of synaptic plasticity that is thought to be associated with learning and memory, was examined through extracellular field recordings from the CA1 region of hippocampal slices, whereas behavioral techniques were used to assess contextual fear memory and reference memory. Amyloid precursor protein (APP) expression was reduced through small interfering RNA (siRNA) technique. Results: We found that both antirodent A? antibody and siRNA against murine APP reduced LTP as well as contextual fear memory and reference memory. These effects were rescued by the addition of human A?42, suggesting that endogenously produced A? is needed for normal LTP and memory. Furthermore, the effect of endogenous A? on plasticity and memory was likely due to regulation of transmitter release, activation of ?7-containing nicotinic acetylcholine receptors, and A?42 production. Interpretation: Endogenous A?42 is a critical player in synaptic plasticity and memory within the normal central nervous system. This needs to be taken into consideration when designing therapies aiming at reducing A? levels to treat Alzheimer disease.
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