Malat1 is a neuron‐enriched nuclear‐retained ncRNA that is localized to nuclear speckles. Malat1 is a neuron‐enriched nuclear‐retained ncRNA that is localized.

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Date of download: 7/7/2016 Copyright © 2016 American Medical Association. All rights reserved. From: Up-regulation of Brain-Derived Neurotrophic Factor.

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Malat1 is a neuron‐enriched nuclear‐retained ncRNA that is localized to nuclear speckles. Malat1 is a neuron‐enriched nuclear‐retained ncRNA that is localized to nuclear speckles. (A) Northern blot analysis of various mouse tissues indicating that Malat1 is detected as a single ∼6.7 kb band with elevated levels in heart, kidney and brain. (B) Malat1 expression is restricted to neurons in the adult mouse hippocampus. RNA‐FISH shows the strongest expression in pyramidal neurons of CA1 and CA3 and in granular neurons of the dentate gyrus (dg). Weaker expression can be detected in neurons of the cortex (cx) and in hippocampal interneurons (arrows). Insets show FISH signal with a sense probe (lower) and DAPI staining (upper) in CA3 region. Scale bar, 100 μm. (C–E) Triple labelling of CA3 region showing Malat1 ncRNA by in situ hybridization (C), neuron‐specific NeuN immunoreactivity (D) and DAPI labelling of cell nuclei (E). Closed arrowheads indicate cells double positive for Malat1 and NeuN staining. Open arrowheads indicate non‐neuronal cells. In a few cases (arrow), weak Malat1 ncRNA signal could be detected in NeuN negative cells. Scale bar, 25 μm. (F–J) Malat1 ncRNA is enriched in nuclear speckles. In wild‐type mouse embryonic fibroblasts (wt‐MEFs) and in mouse cultured hippocampal neurons, Malat1 ncRNA signal (F, H) co‐localizes with SF2/ASF (G) or CC3 immunoreactivity (I), respectively. (J) DAPI staining. Scale bar, 10 μm. Delphine Bernard et al. EMBO J. 2010;29:3082-3093 © as stated in the article, figure or figure legend