Project description:In ischemic stroke, DWI-T2 mismatch (positive signals on DWI but negative signals on T2) indicates ischemia within 4.5 h. However, the molecular expression pattern of this region remains elusive. This project aimed to reveal the proteomics profiling of the brain tissues at DWI-T2 mismatch, T2(+), and contralateral regions of brain within 4.5 h after middle cerebral artery occlusion compared with naïve brains of mice.
Project description:The experiments are done with three libraries by introducing base-pair perturbations on Widom 601: (1) poly(dA:dT) tract library (2) mismatch library (3) insertion library. And additional two more libraries based on native yeast genomic sequences: (4) Park97 mismatch library (5) Park97 insertion library. And we measured the nucleosome positioining in the base-pair resolution for before and after sliding by Chd1 chromatin remodeler.
Project description:Purpose: We report expression of a new Cas13 enzyme in retinal cells and evaluate its efficacy in targeting the VEGFA mRNA to establish safety and efficacy of the enzyme for anti-VEGFA therapy. Methods: Mammalian cells (HEK293FT) or mouse retina were treated with shRNA, CasRx or Cas13bt3 carrying VEGFA targeting sgRNA. Total RNA was collected for RNA seqeuencing to study VEGFA mRNA expression and well as off-target genes. Results: Significant knockdown of VEGFA mRNA was observed with no effect on predicted off-target genes in mammalina cells and mouse retina. No loss of mouse VEGFA was also detected. Conclusions: AAV2.7m8 can be used for retina-wide transduction, and Cas13bt3 may be a potential new tool for control of VEGFA.
Project description:We have characterized gene expression changes in HeLa cells following long term depletion of Cyclin T2 or Cyclin T1 using shRNA HeLa cells were transduced with VSV-G pseudotyped lentiviral vectors expressing shRNA against either Cyclin T2 or Cyclin T1. As a control, cells were transduced with shRNA vector with four nucleotides mismatch in the Cyclin T1 mRNA that has been previously shown to have minimal effects on mRNA expression levels. The vectors have a GFP reporter that can be used to estimate transduction efficiency. Five days post-transduction, cells were harvested and total RNA extracted. Transcriptional profiling was carried out on these RNA samples. Two independent biological replicate experiments were carried out in this analysis and the xpression values normalized by GC-RMA and averaged. The following comparisons were made: MM to Cyclin T2 and MM to Cyclin T1.
Project description:This experiment aims at analyzing genotype profiles of wild-type and apomictic BRS CIRAD-302 rice. Leaf samples from plants of the parental, F1, F2, T0, T1, and T2 were used for DNA purification and library preparation for Illumina sequencing (2x150 bp), performed by the Max Planck-Genome-centre Cologne, Germany (https://mpgc.mpipz.mpg.de/home/).
Project description:VEGFA signaling is crucial for physiological and pathological angiogenesis and hematopoiesis. Although many context-dependent signaling pathways downstream of VegfA have been uncovered, vegfa transcriptional regulation in vivo is unclear. Here, we show that ETS transcription factor Etv6 positively regulates vegfa expression during blood stem cell development through multiple transcriptional inputs. In agreement with its established repressive functions, Etv6 directly inhibits expression of vegfa repressor foxo3. Surprisingly, it also directly activates expression of vegfa activator klf4. Finally, it indirectly binds to vegfa promoter by the recruiment of Klf4. Thus, our work uncovers a dual function for Etv6, as both a transcriptional repressor and activator, in controlling a major signaling pathway.