Increased expression of miRNA-146a in Alzheimer's disease transgenic mouse models |
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Authors: | Li Y Y Cui J G Hill J M Bhattacharjee S Zhao Y Lukiw W J |
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Institution: | LSU Neuroscience Center, Louisiana State University Health Sciences Center, New Orleans, LA 70112-2272, USA. |
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Abstract: | A mouse and human brain-enriched micro-RNA-146a (miRNA-146a) is known to be important in modulating the innate immune response and inflammatory signaling in certain immunological and brain cell types. In this study we examined miRNA-146a levels in early-, moderate- and late-stage Alzheimer's disease (AD) neocortex and hippocampus, in several human primary brain and retinal cell lines, and in 5 different transgenic mouse models of AD including Tg2576, TgCRND8, PSAPP, 3xTg-AD and 5xFAD. Inducible expression of miRNA-146a was found to be significantly up-regulated in a primary co-culture of human neuronal-glial (HNG) cells stressed using interleukin1-beta (IL-1β), and this up-regulation was quenched using specific NF-кB inhibitors including curcumin. Expression of miRNA-146a correlated with senile plaque density and synaptic pathology in Tg2576 and in 5xFAD transgenic mouse models used in the study of this common neurodegenerative disorder. |
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Keywords: | 5xFAD Alzheimer's disease CAY10512 Curcumin miRNA-146a Neurodegeneration NF-кB PDTC Tg2576 Transgenic models of Alzheimer's disease |
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