Persistent ER stress in maize seedlings engages ZmIRE1 in a multiphasic process that transitions from prosurvival activities to cell death [ATAC-Seq]
Ontology highlight
ABSTRACT: Nucleus was isolated from flash frozen from tunicamycin treated (0,6 and 12 hours) maize root samples, purified, then transposition reaction and and purification steps were carried out following the standard ATAC-seq protocol
Project description:We tracked the gene expression events following treatment of maize seedlings with the endoplasmic reticulum (ER) stress agent tunicamycin. ER stress elicits the unfolded protein response (UPR) and when plants are faced with persistent stress, the UPR transitions from an adaptive or cell survival phase to programmed cell death.
Project description:GFP-tagged nuclear localized versions of Zmbzip60 & Zmbzip91 were overexpressed & pulled downed with GFP Ab to look for promoter binding elements
Project description:Persistent ER stress in maize seedlings engages ZmIRE1 in a multiphasic process that transitions from prosurvival activities to cell death
Project description:Persistent ER stress in maize seedlings engages ZmIRE1 in a multiphasic process that transitions from prosurvival activities to cell death [ChIP-Seq]
Project description:Persistent ER stress in maize seedlings engages ZmIRE1 in a multiphasic process that transitions from prosurvival activities to cell death [RNA-Seq]
Project description:Persistent ER stress in maize seedlings engages ZmIRE1 in a multiphasic process that transitions from prosurvival activities to cell death [ATAC-Seq]
Project description:Ribosome profiling (RiboSeq) analysis of murine 17 clone 1 (17Cl-1) cells with and without Tunicamycin treatment. Tunicamycin is known to induce the unfolded protein response, and the objective of this work was to assess the impact of Tunicamycin on cellular translation. Additionally, we sought to assess the impact of differing library preparation methods by using three separate approaches: flash freezing, 1X Cycloheximide, and 100X Cycloheximide.
Project description:Decidual stromal cells differentiate from endometrial stromal fibroblasts (ESFs) under the influence of progesterone and cyclic adenosine monophosphate (cAMP) and are essential for implantation and the maintenance of pregnancy. They evolved in the stem lineage of placental (eutherian) mammals coincidental with the evolution of implantation. Here we use the well-established in vitro decidualization protocol to compare early (3 days) and late (8 days) gene transcription patterns in immortalized human ESF. We document extensive, dynamic changes in the early and late decidual cell transcriptomes. The data suggest the existence of an early signal transducer and activator of transcription (STAT) pathway dominated state and a later nuclear factor ?B (NFKB) pathway regulated state. Transcription factor expression in both phases is characterized by putative or known progesterone receptor ( PGR) target genes, suggesting that both phases are under progesterone control. Decidualization leads to proliferative quiescence, which is reversible by progesterone withdrawal after 3 days but to a lesser extent after 8 days of decidualization. In contrast, progesterone withdrawal induces cell death at comparable levels after short or long exposure to progestins and cAMP. We conclude that decidualization is characterized by a biphasic gene expression dynamic that likely corresponds to different phases in the establishment of the fetal-maternal interface.
Project description:Change is ubiquitous in living beings. In particular, the connectome and neural representations can change. Nevertheless, behaviors and memories often persist over long times. In a standard model, associative memories are represented by assemblies of strongly interconnected neurons. For faithful storage these assemblies are assumed to consist of the same neurons over time. Here we propose a contrasting memory model with complete temporal remodeling of assemblies, based on experimentally observed changes of synapses and neural representations. The assemblies drift freely as noisy autonomous network activity and spontaneous synaptic turnover induce neuron exchange. The gradual exchange allows activity-dependent and homeostatic plasticity to conserve the representational structure and keep inputs, outputs, and assemblies consistent. This leads to persistent memory. Our findings explain recent experimental results on temporal evolution of fear memory representations and suggest that memory systems need to be understood in their completeness as individual parts may constantly change.