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- W2740173637 abstract "<ns4:p><ns4:bold>Background:</ns4:bold> High-throughput next generation sequencing (NGS) technologies enable the detection of biomarkers used for tumor classification, disease monitoring and cancer therapy. Whole-transcriptome analysis using RNA-seq is important, not only as a means of understanding the mechanisms responsible for complex diseases but also to efficiently identify novel genes/exons, splice isoforms, RNA editing, allele-specific mutations, differential gene expression and fusion-transcripts or chimeric RNA (chRNA).</ns4:p><ns4:p> <ns4:bold>Methods:</ns4:bold> We used <ns4:ext-link xmlns:ns3=http://www.w3.org/1999/xlink ext-link-type=uri ns3:href=http://crac.gforge.inria.fr/>Crac</ns4:ext-link>, a tool that uses genomic locations and local coverage to classify biological events and directly infer splice and chimeric junctions within a single read. Crac’s algorithm extracts transcriptional chimeric events irrespective of annotation with a high sensitivity, and <ns4:ext-link xmlns:ns3=http://www.w3.org/1999/xlink ext-link-type=uri ns3:href=http://cractools.gforge.inria.fr/>CracTools</ns4:ext-link> was used to aggregate, annotate and filter the chRNA reads. The selected chRNA candidates were validated by real time PCR and sequencing. In order to check the tumor specific expression of chRNA, we analyzed a publicly available dataset using a new tag search approach.</ns4:p><ns4:p> <ns4:bold>Results:</ns4:bold> We present data related to acute myeloid leukemia (AML) RNA-seq analysis. We highlight novel biological cases of chRNA, in addition to previously well characterized leukemia chRNA. We have identified and validated 17 chRNAs among 3 AML patients: 10 from an AML patient with a translocation between chromosomes 15 and 17 (AML-t(15;17), 4 from patient with normal karyotype (AML-NK) 3 from a patient with chromosomal 16 inversion (AML-inv16). The new fusion transcripts can be classified into four groups according to the exon organization.</ns4:p><ns4:p> <ns4:bold>Conclusions:</ns4:bold> All groups suggest complex but distinct synthesis mechanisms involving either collinear exons of different genes, non-collinear exons, or exons of different chromosomes. Finally, we check tumor-specific expression in a larger RNA-seq AML cohort and identify new AML biomarkers that could improve diagnosis and prognosis of AML.</ns4:p>" @default.
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- W2740173637 date "2017-12-19" @default.
- W2740173637 modified "2023-10-18" @default.
- W2740173637 title "New chimeric RNAs in acute myeloid leukemia" @default.
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- W2740173637 doi "https://doi.org/10.12688/f1000research.11352.2" @default.
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