Ontology highlight
ABSTRACT:
PROVIDER: PRJNA942044 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR23729800_1.fastq.gz | Fastqsanger.gz | |||
| SRR23729800_2.fastq.gz | Fastqsanger.gz | |||
| SRR23729801_1.fastq.gz | Fastqsanger.gz | |||
| SRR23729801_2.fastq.gz | Fastqsanger.gz | |||
| SRR23729802_1.fastq.gz | Fastqsanger.gz |
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Project description:Brassinosteroid (BR) and gibberellin (GA) promote many similar developmental responses in plants; but their relationship remains unclear. Here we show that BR and GA act interdependently through a direct interaction between the BR-activated BZR1 and GAinactivated DELLA transcription regulators. GA promotion of cell elongation required BR signaling, whereas BR or active BZR1 can suppresssed the GA-deficient dwarf phenotype. DELLAs directly interacted with BZR1 and inhibited BZR1-DNA binding both in vitro and in vivo. Genome-wide analysis defined a BZR1-dependent GA-regulated transcriptome, which is enriched with light-regulated genes and genes involved in cell wall synthesis and photosynthesis/chloroplast. GA promotion of hypocotyl elongation requires both BZR1 and the phytochrome interacting factors (PIFs), as well as their common downstream targets PREs. The results demonstrate that GA releases DELLA-mediated inhibition of BZR1, and that the DELLA-BZR1-PIF4 interaction defines a core transcription module that mediates coordinated growth regulation by GA, BR and light signals.
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Project description:Distinct transcriptome changes upon salt exposure are dependent on DELLA and GA-signaling. We performed RNA-sequencing on mock and NaCl- treated Arabidopsis plants to investigate the role of GA-levels and signaling, in particular DELLAs, on gene expression changes upon salt exposure
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Project description:Gallic acid (GA) is a natural phenolic compound with antioxidant, anti-inflammatory, and antineoplastic properties. Previous studies also revealed that GA supplementation inhibit the decline of rat embryonic and rejuvenate the immune function in D-gal-induced aging accelerated mice. However, the role of GA in regulating senescence of human premature aging stem cells is unknown. We have demonstrated that GA showed beneficial effects in alleviating human mesenchymal stem cell (hMSC) senescence: (1) GA alleviated senescence by promoting stem cell self-renewal ability and down-regulating the expression of aging markers, including P16 and P21, in Werner syndrome (WS) hMSCs; (2) High levels of reactive oxygen species in total cell as well as mitochondria were both rescued by GA treatment; (3) GA also maintained epigenetic features, enhanced cell stemness, and improved mitochondrial homeostasis in WS hMSCs. Our data provide substantial evidence supporting that GA is a promising candidate agent to
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Project description:Although abscisic acid (ABA) and gibberellins (GAs) play pivotal roles in many physiological processes in plants, their interaction in the control of leaf growth remains elusive. In this study, genetic analyses of ABA and GA interplay in leaf growth were performed in Arabidopsis thaliana. The results indicate that for ABA and GA interaction, leaf growth of both the aba2/ga20ox1 and aba2/GA20OX1-OE plants exhibits partially additive effects but is similar to the aba2 mutant. Consistent with this result, transcriptome analysis suggests that a substantial proportion (45-65%) of the gene expression profile of aba2/ga20ox1 and aba2/GA20OX1-OE plants overlaps and shares a similar pattern to the aba2 mutant. Thus, these data support that ABA deficiency dominates leaf growth regardless of GA levels. Moreover, gene ontology (GO) analysis indicates gene enrichment in the categories of hormone response, developmental and metabolic processes, and cell wall organization in these three genotypes. Leaf developmental genes are also involved in ABA-GA interaction. Collectively, these data support that the genetic relationship of ABA and GA interaction involves multiple coordinated pathways rather than a simple linear pathway in the regulation of leaf growth. To better understand the molecular basis of ABA and GA interaction, transcriptome analysis was performed among the genotypes used in this study.
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Project description:Gambogic acid (GA) is an anti-cancer agent in phase Ⅱb clinical trial in China. In HeLa cells, GA inhibited cell proliferation, induced cell cycle arrest at G2/M phase and apoptosis, as showed by results of MTT assay and flow cytometric analysis. Possible target-related proteins of GA were searched using comparative proteomic analysis (2-DE) and 9 proteins at early (3 h) stage together with 9 proteins at late (24 h) stage were found. Vimentin was the only target-related protein found at both early and late stage. Results of both 2-DE analysis and Western blotting assay suggested cleavage of vimentin induced by GA. MS/MS analysis of cleaved vimentin peptides indicated possible cleavage sites of vimentin at or near aa51 and aa425. Results of targeted proteomic analysis showed that GA induced change in phosphorylation state of the vimentin head domain (aa51-64). Caspase inhibitors could not abrogate GA-induced cleavage of vimentin. Over-expression of vimentin ameliorated cytotoxicity of GA in HeLa cells. The GA-activated signal transduction, from p38 MAPK, heat shock protein 27 (HSP27), vimentin, dysfunction of cytoskeleton, to cell death, was predicted and then confirmed. Results of animal study showed that GA treatment inhibited tumor growth in HeLa tumor-bearing mice and cleavage of vimentin could be observed in tumor xenografts of GA-treated animals. Results of immunohistochemical staining also showed down-regulated vimentin level in tumor xenografts of GA-treated animals. Furthermore, compared with cytotoxicity of GA in HeLa cells, cytotoxicity of GA in MCF-7 cells with low level of vimentin was weaker while cytotoxicity of GA in MG-63 cells with high level of vimentin was stronger. These results indicated the important role of vimentin in the cytotoxicity of GA. The effects of GA on vimentin and other epithelial-to-mesenchymal transition (EMT) markers provided suggestion for better usage of GA in clinic.
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