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ABSTRACT: Maedi Visna in Sheep

PROVIDER: PRJNA780532 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR16949327_1.fastq.gz	Fastqsanger.gz
	SRR16949327_2.fastq.gz	Fastqsanger.gz
	SRR16949328_1.fastq.gz	Fastqsanger.gz
	SRR16949328_2.fastq.gz	Fastqsanger.gz
	SRR16949329_1.fastq.gz	Fastqsanger.gz

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MVV vector integration in sheep cells

Project description:To test if LEDGF/p75 influences distribution of Maedi-visna virus (MVV) integration sites, we infected sheep CPT3, LKO1 (PSIP1-null), LHKO1 and LHKO2 (PSIP1/HDGFL2-null) cells with MVV-derived vector. Genomic DNA was isolated from infected cells, and chromosomal junctions at integrated U5 vDNA ends were amplified using linker-mediated PCR, sequenced using Illumina technology and mapped to sheep genome.

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Expression analysis of lung miRNAs responding to ovine VM virus infection by RNAseq

Project description:MicroRNAs (miRNAs) are short endogenous, single-stranded, non-coding small RNA molecules of about 22 nucleotides in length. They regulate gene expression post-transcriptionally by silencing mRNA molecules and they regulate many physiological processes. Visna-Maedi virus (VMV) is a lentivirus that causes Visna-Maedi disease (VM) in sheep characterised by pneumonia, mastitis, arthritis and encephalitis; and affects cells of the monocyte/macrophage lineage. So far, there are no studies in the role of miRNAs in this viral disease. Using RNAseq technology and bioinformatics analysis the expression of miRNAs in different phases of the disease were studied. A total of 212 miRNAs were found, of which 46 were conserved sequences found for the first time in sheep and 12 were completely novel. Differential expression analysis showed changes in several miRNAs comparing uninfected and seropositive groups, but did not detect significant differences between seropositive asymptomatic and diseased sheep. The high increase in expression of oar-miR-21 agrees with the increase of the same miRNA detected in other viral diseases. In addition, the target prediction of dysregulated miRNAs revealed that they control genes involved in proliferation-related signalling pathways like PI3K-Akt, AMPK and ErbB.

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Project description:We carried out a cross species cattle-sheep array comparative genome hybridization (aCGH) experiment in order to identify copy number variations (CNVs) in the sheep genome analysing animals of Italian dairy breeds (Sarda, Bagnolese, Laticauda, Massese and Valle del Belice) using a tiling oligonucleotide array with ~385,000 probes designed on the bovine genome. We identified 135 CNV regions (CNVRs) covering about 10.5 Mb of the virtual sheep genome referred to the bovine genome (0.398%) with a mean and median equal to 77.6 kb and 55.9 kb, respectively. A comparative analysis between the identified sheep CNVRs and those reported in the cattle and goat genomes indicated that overlaps between sheep and goat and sheep and cattle CNVRs are highly significant (P<0.0001) suggesting that several chromosome regions might contain recurrent interspecies CNVRs. Many sheep CNVs affect genes with important biological functions. Further studies are needed to evaluate the functional relevance of these CNVs.

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