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Subcellular profiling of macrophage long non-coding RNAs

ABSTRACT: Recent advances in next generation sequencing have improved human genome annotations and revealed thousands of previosly unknown long non-coding RNA loci. Here, we characterized immune-responsive long non-coding RNAs (lncRNAs) and determined their subcellular localization and co-sedimentation with protein complexes in primary human macrophages. To this end, we profiled LPS-responsive lncRNAs, isolated cytoplasmic and nuclear RNA fractions from mock- and LPS-treated cells and seperated cell lysates on 10-60 % glycerol gradients, followed by gradient fractionation. All samples were subjected to RNA-Seq analysis. LPS-responsive lncRNAs were found to be mostly cytoplasmic. Glycerol gradient datasets revealed that a substantial fraction of LPS-responsive lncRNAs, similar to mRNAs, co-sediments with ribosomal RNAs and also ribosomal proteins, as confirmed by mass-spectrometry analysis. LncRNAs not co-sedimenting with ribosomes displayed a highly heterogenous gradient distriubtion. Among these truly non-coding RNAs we identified lncRNA MaIL1 as a novel element of the macrophage TLR-TRIF signaling pathway contributing to antibacterial defense.

ORGANISM(S): Homo sapiens

PROVIDER: GSE101409 | GEO | 2020/03/16

REPOSITORIES: GEO

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