Unknown,Transcriptomics,Genomics,Proteomics

Dataset Information

MicroRNA Targetome Analysis of Latently KSHV-infected Primary Effusion Lymphoma Cell lines Using PAR-CLIP [Illumina]

ABSTRACT: Primary effusion lymphoma (PEL) is caused by Kaposi's sarcoma-associated herpesvirus (KSHV) and frequently also harbors Epstein-Barr virus (EBV). The expression of KSHV- and, often, EBV-encoded microRNAs (miRNAs) in PELs suggests a role for these miRNAs in viral latency and lymphomagenesis. Here we report the direct and transcriptome-wide identification of miRNA target sites for all miRNAs expressed in PEL cell lines. The resulting dataset revealed that KSHV miRNAs directly target more than 2000 cellular mRNAs encoding proteins that function in pathways with relevance to KSHV pathogenesis. Moreover, ~50% of these mRNAs are also targeted by EBV miRNAs, via distinct binding sites. In addition to a known viral analog of miR-155, we show that KSHV encodes a viral miRNA that mimics cellular miR-142-3p function. In summary, these experiments identify an extensive list of mRNAs targeted by KSHV miRNAs and indicate that these are likely to strongly influence viral replication and pathogenesis. small RNA sequencing, 3 samples Ago2 (EIF2C2) PAR-CLIP, 2 samples

ORGANISM(S): Homo sapiens

SUBMITTER: Eva Gottwein

PROVIDER: E-GEOD-32109 | biostudies-arrayexpress |

REPOSITORIES: biostudies-arrayexpress

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Publications

Viral microRNA targetome of KSHV-infected primary effusion lymphoma cell lines.

Gottwein Eva E Corcoran David L DL Mukherjee Neelanjan N Skalsky Rebecca L RL Hafner Markus M Nusbaum Jeffrey D JD Shamulailatpam Priscilla P Love Cassandra L CL Dave Sandeep S SS Tuschl Thomas T Ohler Uwe U Cullen Bryan R BR

Cell host & microbe 20111101 5

Primary effusion lymphoma (PEL) is caused by Kaposi's sarcoma-associated herpesvirus (KSHV) and frequently also harbors Epstein-Barr virus (EBV). The expression of KSHV- and EBV-encoded microRNAs (miRNAs) in PELs suggests a role for these miRNAs in latency and lymphomagenesis. Using PAR-CLIP, a technology which allows the direct and transcriptome-wide identification of miRNA targets, we delineate the target sites for all viral and cellular miRNAs expressed in PEL cell lines. The resulting data s ...[more]

PMID: 22100165

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Project description:We have used genome editing to generate inactivating deletion mutations in all three copies of the dicer (hdcr) gene present in the human cell line 293T. As previously shown in murine ES cells lacking Dicer function, hDcr-deficient 293T cells are severely impaired for the production of mature microRNAs (miRNAs). Nevertheless, RNA-induced silencing complexes (RISCs) present in these hDcr-deficient cells are readily programmed by transfected, synthetic miRNA duplexes to repress mRNAs bearing either fully or partially complementary targets, including targets bearing incomplete seed homology to the introduced miRNA. Using these hDcr-deficient 293T cells, we demonstrate that human pre-miRNA processing can be effectively rescued by ectopic expression of the Drosophila Dicer 1 protein, but only in the presence of the PB isoform of Loquacious (Loqs-PB), the fly homolog of the hDcr co-factor TRBP. In contrast, Drosophila Dicer 2, even in the presence of its co-factors Loqs-PD and R2D2, was unable to support human pre-miRNA processing. Interestingly, although ectopic Drosophila Dicer 1/Loqs-PB or hDcr both rescued pre-miRNA processing effectively in these hDcr-deficient cells, there were significant differences in the ratio of the miRNA isoforms that were produced, especially in the case of miR-30 family members, and we also noted differences in the relative expression level of miRNAs versus passenger strands for a subset of human miRNAs. These data demonstrate that the mechanisms underlying the accurate processing of pre-miRNAs are largely, but not entirely, conserved between mammalian and insect cells. Series includes three datasets of total small RNA reads from wild type and Dicer negative 293T cells. Also included are total small RNA reads of the Dicer-negative cell line NoDice(4-25) transfected with a vector expressing human Dicer, Drosophila Dicer1, or mock transfected. RISC-associated small RNAs identified by ribonucleoprotein immunoprecipitation (RIP-Seq) in wild type 293T, Dicer-negative NoDice(4-25) line, and NoDice(4-25) transfected with either hsa-miR-155 or kshv-miR-K12-11 miRNA duplexes. The final data series are PAR-CLIP libraries which identified microRNA targets in untransfected NoDice(4-25) cells and NoDice(4-25) cells transfected with either hsa-miR-92a, hsa-miR-155, kshv-miR-K12-11 miRNA duplexes

Dataset Information

MicroRNA Targetome Analysis of Latently KSHV-infected Primary Effusion Lymphoma Cell lines Using PAR-CLIP [Illumina]

Publications

Viral microRNA targetome of KSHV-infected primary effusion lymphoma cell lines.

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