Identification of Predictive Gene Markers for Multipotent Stromal Cell Proliferation
ABSTRACT: This SuperSeries is composed of the SubSeries listed below. Identification of genes that can predict the proliferation potential of multipotent stromal cells. Gene expression study by microarray and confirmation with RT-qPCR. Gene expression by microarray includes the 54 arrays originally present in GSE56362 and 9 additional arrays added to GSE56362 on October 23, 2015. These additional microarray datasets were completed in a randomized block design in combination with the microarray data originally present in GSE56362.
Project description:Gene Markers of Cellular Aging in Human Multipotent Stromal Cells in Culture Identifying gene markers of cellular aging as determined by cellular passaging of human multipotent stromal cells (MSCs) derived from bone marrow Repeated Measures Experiment; MSC from 6 different donors at 3 passages (passages 3, 5, & 7) with 3 technical replicates at each passage; a total of 54 microarrays
Project description:Transcriptional profiling of COLO 320 xenograft tumor cells comparing control COLO 320 xenograft without co-implanted rat MSCs with COLO 320 xenograft with co-implanted rat MSCs. The latter makes co-implanted MSCs visualization possible by using MSCs labeled by GFP under FACS and single cell microscopy. Two-condition experiment, COLO 320 xenograft without rat MSCs [COLO320 MSC(-)] vs. COLO 320 xenograft with rat MSCs [COLO320 MSC(+)]. Biological replicates: 1 control, 1 sample, paired xengraft tumor cells grown and harvested from the same mouse host. One replicate per array.
Project description:The COP9 signalosome (CSN) is a highly conserved eukaryotic protein complex which regulates the Cullin-RING family of ubiquitin ligases and carries out a deneddylase activity that resides in subunit 5 (CSN5). The budding yeast CSN is biochemically active and deletion mutants of each of its subunits exhibit deficiency in deneddylation of cullins, although the biological context of this activity is still unknown in this organism. To further characterize CSN function in budding yeast, we present here a transcriptomic analysis of a S. cerevisiae strain deleted in CSN5/RRI1 gene (hereafter referred to as CSN5), coding for the only canonical subunit of the complex. We show that Csn5 is involved in the modulation of the genes controlling aminoacid and lipid metabolism, and especially ergosterol biosynthesis. These alterations in gene expression correlate with the lower ergosterol levels and increased intracellular zinc content which we observed in csn5 null mutant cells. Two biological replicates, csn5 deleted strain vs. isogenic wild-type strain W303
Project description:Characterization of the lsm1a lsm1b transcriptional profile. LSM1 protein is involved in RNA decay through decapping facilitation. The performed array help us to understand the transcription level alterations produced by the absence of LSM1. One-condition experiment, Col-0 vs. lsm1a lsm1b plants. Biological replicates: 3 control replicates.
Project description:The cell cycle transcription factor E2FB has been overexpressed in tomato plants (Solanum lycopersicum cv. Micro-Tom). This overexpression accelerates plant development and increases fruit yield. Total RNA was purified from true leaves and apical meristem of 14 days-old WT or E2FB-OE seedlings.
Project description:Using diamagnetic levitation, we have exposed A. thaliana in vitro callus cultures to five environments with different levels of effective gravity (from levitation i.e. simulated mg* to 2g*) and magnetic fields (10.1 to 16.5 Tesla) and we have compared the results with those of similar experiments done in a Random Position Machine (simulated micro g) and a Large Diameter Centrifuge (2g) free of high magnetic fields. Microarray analysis indicates that there are changes in overall gene expression of the cultured cells exposed to these unusual environments but also that gravitational and magnetic field produce synergic variations in the steady state of the transcriptional profile of A. thaliana. Significant changes in the expression of structural, abiotic stress and secondary metabolism genes were observed into the magnet field. These results confirm that the strong magnetic field, both at micro g* or 2g*, has a significant effect on the expression of these genes but subtle gravitational effects are still observable. These subtle responses to microgravity environments are opposite to the ones observed in a hypergravity one. seven-condition experiment, MM2D Arabidopsis culture callus control vs. Treatment (altered gravity simulation, GBF). Three GBF were used (LDC (2g) + control, RPM (mg) + control and Magnet (mg*, 0.1g*, 1g*, 1.9g*, 2g*) + control). Biological replicates: 3 replicates in all conditions and controls except 1.9g* (2 replicates)
Project description:To determine whether IYO is not only necessary but also sufficient to activate transcription of developmental programs, we compared the transcriptome of shoot apices from 35S::IYO-GFP plants to that of 35S::GFP plants at the time of inflorescence emergence. Our results strongly suggest that IYO activates the transcription of key developmental regulators driving differentiation. Shoot apices RNA sample is a pool from RNAs from four independent experiments, and the RNA from each experiment was a pool of RNAs extracted from 12 individuals Arabidopsis 35S:IYO-GFP or 35S:GFP plants.
Project description:NINJA (At4g28910) and TOPLESS proteins function as negative regulators of jasmonate responses. Our results point to TPL proteins as general co-repressors that affect multiple signalling pathways through the interaction with specific adaptor proteins. This new insight reveals how stress- and growth-related signalling cascades use common molecular mechanisms to regulate gene expression in plants. Two-condition experiment, Col-0 vs. plants silencing NINJA (RNAi-NINJA) and both Col-0 vs RNAi NINJA treated with coronatine . Biological replicates: 4 control replicates untreated , 4 RNAi NINJA untreated replicates, 4 control treated replicates and 4 RNAi NINJA treated replicates
Project description:Plant 9-lipoxygenases (9-LOX) and α-dioxygenases (α-DOX) initiate the synthesis of oxylipins after bacterial infection. Here, the role of these enzymes in plant’s defense was investigated using individual Arabidopsis thaliana lox1 and dox1 mutants and a double lox1 dox1 mutant. Studies with Pseudomonas syringae pv tomato (Pst) revealed the enhanced susceptibility of lox1 to the virulent strain Pst DC3000 and the partial impairment of lox1 and dox1 mutants to activate systemic acquired resistance. Notably, both defects were enhanced in the lox1 dox1 plants as compared with individual mutants. We found that pre-treatment with 9-LOX- and -DOX-generated oxylipins protected plant tissues against bacterial infection. The strongest effect in this respect was exerted by 9-ketooctadecatrienoic acid (9-KOT), which is produced from linolenic acid by 9-LOX. Quantification of 9-KOT revealed its accumulation after bacterial infection. The levels were reduced in lox1 and lox1 dox1 plants but strongly increased in the dox1 mutant due to metabolic interaction of the two pathways. Transcriptional analyses indicated that 9-KOT pre-treatment modifies hormone homeostasis during bacterial infection. The nature of the changes detected suggested that 9-KOT interfers the hormonal changes caused by bacterial effectors. This notion was substantiated by the finding that 9-KOT failed to reduce the growth of PstDC3000hrpA, a mutant compromised in effector secretion, and of the avirulent strain Pst DC3000 avrRpm1. Further support to the action of the 9-LOX- and -DOX-oxylipin pathways as modulators of hormone homeostasis was the observation that lox1 dox1 seedlings are hypersensitive to the growth-inhibitory effect of ABA and showed enhanced activation of ABA-inducible marker genes. Two experiments, Col-0 treated with 9-KOT vs. Col-0 treated with water and Col-0 treated with 9-KOT vs. Col-0 treated with water after treatment with Pst DC3000. Biological replicates: 4 control replicates treated , 4 9-KOT treated replicates; 4 control treated and Pst DC3000 replicates and 4 9-KOT treated and Pst DC3000 replicates
Project description:Comparison of expression profiles in adipose derived MSCs (AD-MSCs) without or with transfection of siR-EID1 and shR-EID1 and cord blood-derived HSCs (CB-HSCs). After MSCs were transfected with sRNA-EID1, they could be converted into HSCs. The goal was to determine possible molecular mechanisms of MSC transdetermination. Two-condition experiments: AD-MSCs vs CB-HSCs, and AD-MSCs transfected with the combination of siR-EID1 and shR-EID1 vs AD-MSCs transfected with shR-EID1.