scholarly journals Over-expression of transcription factor ARK1 gene leads to down-regulation of lignin synthesis related genes in hybrid poplar ‘717’

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Qinxia Ye ◽  
Xiaozhen Liu ◽  
Wen Bian ◽  
Zhiming Zhang ◽  
Hanyao Zhang
Keyword(s):  
Transcription Factor ◽  
Hybrid Poplar ◽  
Down Regulation ◽  
Over Expression ◽  
Lignin Synthesis

scholarly journals Transgelin interacts with PARP1 and affects Rho signaling pathway in human colon cancer cells

2020 ◽  
Author(s):  
Zhen-xian Lew ◽  
Hui-min Zhou ◽  
Yuan-yuan Fang ◽  
Zhen Ye ◽  
Wa Zhong ◽  
...  
Keyword(s):  
Mass Spectrometry ◽  
Colon Cancer ◽  
Transcription Factor ◽  
High Performance Liquid Chromatography ◽  
Cancer Cells ◽  
Signaling Pathway ◽  
High Performance ◽  
Colon Cancer Cells ◽  
Over Expression ◽  
Key Genes

Abstract Background: Transgelin, an actin-binding protein, is associated with the cytoskeleton remodeling. Our previous studies found that transgelin was up-regulated in node-positive colorectal cancer versus in node-negative disease. Over-expression of TAGLN affected the expression of 256 downstream transcripts and increased the metastatic potential of colon cancer cells in vitro and in vivo. This study aims to explore the mechanisms that transgelin participates in the metastasis of colon cancer cells.Methods: Immunofluorescence and immunoblotting analysis were used to determine the cellular localization of the endogenous and exogenous transgelin in colon cancer cells. Co-immunoprecipitation and subsequent high performance liquid chromatography/tandem mass spectrometry were performed to identify the proteins potentially interacting with transgelin. Bioinformatics methods were used to analyze the 256 downstream transcripts regulated by transgelin to discriminate the specific key genes and signaling pathways. By analyzing the promoter region of these key genes, GCBI tools were used to predict the potential transcription factor(s) for these genes. The predicted transcription factors were matching to the proteins that have been identified to potentially interact with transgelin. The interaction between transgelin and these transcription factors was verified by co-immunoprecipitation and immunoblotting.Results: Transgelin was found to localize both in the cytoplasm and the nucleus of colon cancer cells. 297 proteins have been identified to interact with transgelin by co-immunoprecipitation and subsequent high performance liquid chromatography/mass spectrometry. Over-expression of TAGLN could lead to differential expression of 184 downstream genes. By constructing the network of gene-encoded proteins, 7 genes (CALM1, MYO1F, NCKIPSD, PLK4, RAC1, WAS and WIPF1) have been discriminated as key genes using network topology analysis. They are mostly involved in the Rho signaling pathway. Poly ADP-ribose polymerase-1 (PARP1) was predicted as the unique transcription factor for the key genes and concurrently matching to the DNA-binding proteins potentially interacting with transgelin. Immunoprecipitation validated that PARP1 interacted with transgelin in human RKO colon cancer cells.Conclusions: The results of this study suggest that transgelin binds to PARP1 and regulates the expression of the downstream key genes mainly involving Rho signaling pathway, thus participates in the metastasis of colon cancer.

The over-expression of a chrysanthemum WRKY transcription factor enhances aphid resistance

2015 ◽  
Vol 95 ◽  
pp. 26-34 ◽  
Author(s):  
Peiling Li ◽  
Aiping Song ◽  
Chunyan Gao ◽  
Jiafu Jiang ◽  
Sumei Chen ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Wrky Transcription Factor ◽  
Aphid Resistance ◽  
Over Expression

scholarly journals MicroRNAs in mouse models of lymphoid malignancies

2010 ◽  
Vol 1 (1) ◽  
pp. 8 ◽  
Author(s):  
Nicola A. O. Zanesi ◽  
Yuri Pekarsky ◽  
Francesco Trapasso ◽  
George Calin ◽  
Carlo M. Croce
Keyword(s):  
Gene Expression ◽  
Mouse Models ◽  
Gene Expression Regulation ◽  
Human Leukemia ◽  
Down Regulation ◽  
Over Expression ◽  
Lymphoid Malignancies ◽  
Knockout Animals ◽  
Mouse Modeling

<!--StartFragment--> <p class="MsoBodyText"><span style="mso-tab-count: 1;"> </span>The discovery of microRNAs (miRNAs) has revealed a new layer of gene expression regulation that affects many normal and pathologic biological systems. Among the malignancies affected by the dysregulation of miRNAs there are cancers of lymphoid origin, in which miRNAs are thought to have tumor suppressive or tumor promoting activities, depending on the nature of their specific targets. In the last 4-5 years, the experimental field that provided the deepest insights into the <em>in vivo</em><span style="font-style: normal;"> biology of miRNAs is that of mouse modeling in which transgenic and knockout animals mimic, respectively, over-expression or down-regulation of specific miRNAs involved in human leukemia/lymphoma. This review discusses recent advances in our understanding of lymphoid malignancies based on the natural and engineered mouse models of three different miRNAs, miR-15a/16-1 cluster, miR-155, and miR-17-92 cluster.</span></p> <!--EndFragment-->

scholarly journals MicroRNA-101 inhibits growth and metastasis of human ovarian cancer cells by targeting PI3K/AKT

2021 ◽  
Vol 17 (1) ◽  
pp. 127-134
Author(s):  
Min Wei ◽  
Hongjuan Jin ◽  
ShuLi Yang ◽  
Zhuo Li ◽  
Xinlei Wang ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Ovarian Cancer ◽  
Cancer Cells ◽  
Quantitative Polymerase Chain Reaction ◽  
Pten Expression ◽  
Cell Cycle Analysis ◽  
Ovarian Cancer Cells ◽  
G1 Arrest ◽  
Down Regulation ◽  
Over Expression

IntroductionOvarian cancer is the most frequent cause of gynecological cancer related mortality in woman. This study was designed to investigate the role and therapeutic potential of miRNA-101 in ovarian cancer.Material and methodsExpression analysis was carried out by real-time quantitative polymerase chain reaction. Transfections were performed with the help of Lipofectamine 2000 reagent. AO/EB and annexin V/PI staining was used to detect apoptosis and flow cytometry was used for cell cycle analysis. Western blotting was employed for cell cycle analysis.ResultsIt was found that miRNA-101 was significantly down-regulated in ovarian cancer cells. The over-expression of miRNA-101 causes a significant decrease in the viability of ovarian cancer cells via the initiation of apoptosis and sub-G1 arrest of OVACAR-3 cells. It was indicated that PTEN was the potential target of miRNA-101 in OVACAR-3 cells. There was 4.5-fold up-regulation of PTEN expression in ovarian cancer cell lines and the over-expression of miRNA-101 in OVACAR-3 cells resulted in the down-regulation of PTEN expression. The inhibition of PTEN in the OVACAR-3 cells arrested the proliferation of these cells. The over-expression of miRNA-101 causes significant down-regulation in PI3K and AKT expression of OVACAR-3 cells.ConclusionsIt can be concluded that miRNA-101 acts as a tumor suppressor which may be beneficial in the treatment of ovarian cancer.

scholarly journals Hypoxia inducible factor down-regulation, cancer and cancer stem cells (CSCs): ongoing success stories

MedChemComm ◽  
2017 ◽  
Vol 8 (1) ◽  
pp. 21-52 ◽  
Author(s):  
Anthony R. Martin ◽  
Cyril Ronco ◽  
Luc Demange ◽  
Rachid Benhida
Keyword(s):  
Stem Cells ◽  
Transcription Factor ◽  
Cancer Stem Cells ◽  
Hypoxia Inducible Factor ◽  
Large Set ◽  
Down Regulation ◽  
Self Renewal ◽  
Hypoxia Inducible Factor 1 ◽  
Success Stories ◽  
Tumour Vascularization

In cancers, hypoxia inducible factor 1 (HIF-1) is an over-expressed transcription factor, which regulates a large set of genes involved in tumour vascularization, metastases, and cancer stem cells (CSCs) formation and self-renewal.

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