Project description:We describe a case of a child affected by a relapsed PML/RARA-negative acute promyelocytic leukemia (APL) rescued by a combination of all-trans retinoic acid (ATRA) and arsenic trioxide (ATO) and subsequent HSCT. We provide evidence of the presence of a chimeric viral transcript generated through genomic integration of a Torque Teno Mini Virus sequence into RARA intron 2, the recurrent breakpoint of all chimeric RARA fusions found in APL. This generates an in-frame TTMV/RARA chimeric fusion that is highly expressed at disease diagnosis and relapse and fully cleared at remission achievement.
2021-12-01 | GSE169521 | GEO
Project description:Viral Metagenomics analysis of kidney donors and recipients: Torque teno virus genotyping and prevalence
Project description:Microarray based CGH was conducted over a group of 29 strains of S. Enteritidis spanning different epidemiological periods in Uruguay, plus 6 other S. Enteritidis strains isolated from distant geographical regions. We also included 9 Salmonella enterica strains of other serovars isolated in Uruguay. A S. Enteritidis dispensable genome of 233 chromosomal genes and high extent of variation in virulence plasmid was found. Strains isolated before the epidemic show the highest genomic differences as compared with the PT4 reference strain. Comparison with the gene content of other serovars demonstrate extensive horizontal gene transfer between circulating strains beyond serovar definition. Our results show that the epidemic of S Enteritidis in Uruguay was produced by the introduction of strains closely related to PT4, and corroborate the extensive genetic homogeneity among S. Enteritidis isolates worldwide. Phage SE14 emerges as the only specific region for S. Enteritidis. Genetic differences detected in pre-epidemic strains, mainly associated with the absence of phage SE20, suggest that genetic features encoded in this phage may be related to particular epidemiological behavior.
Project description:Transcripts of the gill epithelium from three different stocks of Atlantic salmon (Salmo salar) migrating from freshwater river to lake (Saimaa stock, SS), brackish water (Neva stock, NS) or seawater (Teno stock, TS) were compared at three successive developmental stages (parr, smolt and postsmolt) using the 16K GRASP cDNA microarray platform.
