Source:http://linkedlifedata.com/resource/pubmed/id/21431475
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Predicate | Object |
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rdf:type | |
lifeskim:mentions | |
pubmed:issue |
2
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pubmed:dateCreated |
2011-3-24
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pubmed:abstractText |
The mediator neuroprotectin D1 (NPD1) is an enzymatic derivative of the omega-3 essential fatty acid docosahexaenoic acid. NPD1 stereoselectively and specifically binds to human retinal pigment epithelium (RPE) cells and neutrophils. In turn, this lipid mediator induces dephosphorylation of Bcl-x(L) in a PP2A-dependent manner and induces PI3K/Akt and mTOR/p70S6K pathways leading to RPE cell survival during oxidative stress-induced apoptosis. As a proof of principle of its systemic in vivo bioactivity, NPD1 attenuates laser-induced choroidal neovascularization in mice. Using human neural cells transfected with amyloid precursor protein (APP)sw (Swedish double mutation APP695sw, K595N, M596L), NPD1 was shown to regulate secretase-mediated production of A? peptide, downregulates pro-inflammatory gene expression, and promotes cell survival. In human neural cells overexpressing beta-amyloid precursor protein (?APP), the lipid mediator suppressed A?42 shedding by downregulating ?-secretase (BACE1) while activating the ?-secretase (ADAM10), thus shifting the ?APP cleavage from the noxious amyloidogenic pathway into a non-amyloidogenic, neurotrophic pathway. Furthermore, downregulation of A?42 peptide release by NPD1 may be dependent upon PPAR? activation. In conclusion, NPD1 exhibits anti-inflammatory, anti-amyloidogenic, and anti-apoptotic bioactivities in human neural cells in part via PPAR? signaling and through the targeting of ?- and ?-secretase systems.
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pubmed:grant | |
pubmed:language |
eng
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pubmed:journal | |
pubmed:citationSubset |
IM
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pubmed:chemical | |
pubmed:status |
MEDLINE
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pubmed:month |
Apr
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pubmed:issn |
1559-1182
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pubmed:author | |
pubmed:issnType |
Electronic
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pubmed:volume |
43
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
131-8
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pubmed:meshHeading |
pubmed-meshheading:21431475-Alzheimer Disease,
pubmed-meshheading:21431475-Amyloid,
pubmed-meshheading:21431475-Cell Survival,
pubmed-meshheading:21431475-Docosahexaenoic Acids,
pubmed-meshheading:21431475-Down-Regulation,
pubmed-meshheading:21431475-Humans,
pubmed-meshheading:21431475-Models, Biological,
pubmed-meshheading:21431475-Neurons
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pubmed:year |
2011
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pubmed:articleTitle |
Neuroprotectin D1 induces neuronal survival and downregulation of amyloidogenic processing in Alzheimer's disease cellular models.
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pubmed:affiliation |
Neuroscience Center of Excellence, Louisiana State University Health Sciences Center, 2020 Gravier Street, Suite D, New Orleans, LA 70112, USA.
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pubmed:publicationType |
Journal Article,
Review,
Research Support, Non-U.S. Gov't,
Research Support, N.I.H., Extramural
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