Project description:Primary hematopoietic cells were transformed by retrovirally transduced MLL-ENL. The resulting cell population was either cultured in full medium or under starvation conditions without serine and glycine. In addition a spontaneously arising ser/gly starvation resistant clone was included in this experiment. Nascent RNA was isolated by labeling cells for 1h with 4-thio-uridine and subsequent biotinylation of labeled RNA followed by streptavidin chromatography as described in Garcia-Cuellar et al. CellReports S22111247(16)30259-5.
Project description:We report the application of next-generation RNA and ATAC sequencing technology for high-throughput profiling of MLL-ENL transformed cell lines. According to our results, the C/EBP transcription factors coordinate the expression of the MLL-ENL/Hoxa target genes. Genetic removal of both Cebpa and Cebpb revealed a surrogate function of C/EBPε for myeloid MLL-ENL transformation.
Project description:We report the application of next-generation RNA and ATAC sequencing technology for high-throughput profiling of MLL-ENL transformed cell lines. According to our results, the C/EBP transcription factors coordinate the expression of the MLL-ENL/Hoxa target genes. Genetic removal of both Cebpa and Cebpb revealed a surrogate function of C/EBPε for myeloid MLL-ENL transformation.
Project description:RNA-Seq of 1) human AML samples; 2) sorted, uncultured distinct population from human cord blood (CB); 3) short-term (ST) cultured sorted CB cells transduced with MLL-ENL, MLL-AF6 or untransduced; and 4) cultured (LT) sorted CB cells transformed with MLL-ENL or MLL-AF6. Cells from MLL-fusion AML patients are bulk. Several cords were used for the sorting (CB1, CB2, CB3, 135, 141...) and these represent biological replicates. Several samples were sequenced several times in different lanes and results were merged together for the analysis (rep1,rep2...). Samples were used to determine the different effect of MLL-fusions in different celltypes just after the transduction, and after a longer time period when cells were transformed. Sorted CB samples, uncultured as well as transformed by MLL-fusions, were used in machine learning approach to predict which of the patients originated from which cell-type of origin.
Project description:To investigate the contribution of ENL YEATS domain and downstream sequences in MLL-ENL leukemogenesis program, we generated MLL-ENL and MLL-ENL ∆YEATS (ENL aa372-559) cell lines by retrovirally introducing these constructs into lineage negative hematopoietic stem and progenitor cells (HSPCs).
Project description:We report the discovery of a simple environmental sensing mechanism for biofilm formation in the bacterium Bacillus subtilis that operates without the involvement of a dedicated RNA or protein. Certain serine codons, the four UCN codons, in the gene for the biofilm repressor SinR caused a lowering of SinR levels under biofilm-inducing conditions. Synonymous substitutions of these UCN codons with AGC or AGU impaired biofilm formation and gene expression. Conversely, switching AGC or AGU to UCN codons upregulated biofilm formation. Genome-wide ribosome profiling showed that ribosomes paused longer at UCN codons than at AGC or AGU during biofilm formation. Serine starvation recapitulated the effect of biofilm-inducing conditions on ribosome pausing and SinR production. As serine is one of the first amino acids to be exhausted at the end of exponential phase growth, ribosome pausing at serine codons may be exploited by other microbes in adapting to stationary phase. 4 samples for ribosome profiling and 2 samples for total mRNA profiling