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https://www.readbyqxmd.com/read/28634077/depdc1-promotes-cell-proliferation-and-tumor-growth-via-activation-of-e2f-signaling-in-prostate-cancer
#1
Lin Huang, Keng Chen, Zhao-Peng Cai, Fu-Chao Chen, Hui-Yong Shen, Wei-Hua Zhao, Song-Jie Yang, Xu-Biao Chen, Guo-Xue Tang, Xi Lin
DEP domain containing 1 (DEPDC1) is recently reported to be overexpressed in several types of human cancer; however the role of DEPDC1 in prostate cancer remains to be investigated. Herein, we identified that the DEPDC1 mRNA and protein expression levels were dramatically increased in prostate cancer tissues and cell lines. Overexpression of DEPDC1 promoted, but depletion of DEPDC1 inhibited cell proliferation by regulating the G1-S phase cell cycle transition. Importantly, we found that DEPDC1 was essential for the tumor growth and formation of bone metastases of prostate cancer cells in vivo...
June 17, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28634044/mir-218-suppresses-gastric-cancer-cell-cycle-progression-through-the-cdk6-cyclin-d1-e2f1-axis-in-a-feedback-loop
#2
Min Deng, Chao Zeng, Xihong Lu, Xiusheng He, Ruixin Zhang, Qinwei Qiu, Guopei Zheng, Xiaoting Jia, Hao Liu, Zhimin He
Studies in several cancers have suggested that miR-218 has anti-tumor activities, but its function is yet to be elucidated. In this study, we investigated the regulation and function of miR-218 (miR-218-5p) in the cell cycle progression of gastric cancer (GC). We found that miR-218 could suppress proliferation of gastric cancer cells, induce cell cycle arrest at the G1 phase and inhibit tumor growth and metastasis in vivo. We also demonstrated that miR-218 specifically targeted the 3'-UTR regions of CDK6 and cyclin D1 and inhibited the expression of these molecules, which in turn repressesed the pRb/E2F1 signaling pathway...
June 17, 2017: Cancer Letters
https://www.readbyqxmd.com/read/28627618/hypoxia-inducible-factor-1%C3%AE-regulates-autophagy-via-the-p27-e2f1-signaling-pathway
#3
Pan Wang, Meijing Long, Shijie Zhang, Zhenyun Cheng, Xin Zhao, Fucheng He, Hongchun Liu, Liang Ming
Autophagy is a highly conserved process by which the cell contents are delivered to lysosomes for degradation, or are used to provide macromolecules for energy generation under conditions of nutritional starvation. It has previously been demonstrated that cancer cells in hypoxic regions, with an oxygen concentration below the normal physiological level, express hypoxia inducible factor (HIF)‑1α, in order to adapt and survive. HIF‑1α is important in the regulation of oxygen homeostasis and the transcription of hundreds of genes in response to conditions of hypoxia, hence maintaining energy and redox homeostasis...
June 15, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28616572/reversible-lysine-acetylation-regulates-nuclear-translocation-of-tyrrs-to-counteract-genotoxic-oxidative-stress
#4
Chaoqun Li, Wei Yu
Aminoacyl-tRNA synthetases, catalyzing the first step of protein synthesis, have been shown to involve with multiple additional physiologic responses. Here, we summarize our findings that p300/CBP-Associated Factor and Sirtuin 1 play the reversible acetylation role in regulating the nuclear translocation of Tyrosyl-tRNA synthetase and activating transcription factor E2F1, thus facilitating the repair of damaged DNA.
2017: Molecular & Cellular Oncology
https://www.readbyqxmd.com/read/28615518/estrogen-activated-mdm2-disrupts-mammary-tissue-architecture-through-a-p53-independent-pathway
#5
Nandini Kundu, Angelika Brekman, Jun Yeob Kim, Gu Xiao, Chong Gao, Jill Bargonetti
The Cancer Genome Atlas (TCGA) data indicate that high MDM2 expression correlates with all subtypes of breast cancer. Overexpression of MDM2 drives breast oncogenesis in the presence of wild-type or mutant p53 (mtp53). Importantly, estrogen-receptor positive (ER+) breast cancers overexpress MDM2 and estrogen mediates this expression. We previously demonstrated that this estrogen-MDM2 axis activates the proliferation of breast cancer cell lines T47D (mtp53 L194F) and MCF7 (wild-type p53) in a manner independent of increased degradation of wild-type p53 (ie, p53-independently)...
May 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/28612512/the-germline-factor-ddx4-functions-in-blood-derived-cancer-cell-phenotypes
#6
Natalie Schudrowitz, Satoshi Takagi, Gary M Wessel, Mamiko Yajima
DDX4 (the human ortholog of Drosophila Vasa) is an RNA helicase and is present in the germ lines of all metazoans tested. It was historically thought to be expressed specifically in germline cells, but with additional organisms studied, it is now clear that in some animals DDX4/Vasa functions outside of the germline, in a variety of somatic cells in the embryo and adult. In this report, we document that DDX4 is widely expressed in soma-derived cancer cell lines, including myeloma (IM-9) and leukemia (THP-1) cells...
June 14, 2017: Cancer Science
https://www.readbyqxmd.com/read/28607595/e2f8-is-a-potential-therapeutic-target-for-hepatocellular-carcinoma
#7
REVIEW
Yi Lv, Jia Xiao, Jing Liu, Feiyue Xing
E2F transcriptional factors are widely expressed in a number of tissues and organs, possessing many regulatory functions related to cellular proliferation, differentiation, DNA repair, cell-cycle and cell apoptosis. E2F8 is a recently identified member of the E2F family with a duplicated DNA-binding domain feature discriminated from E2F1-6, controlling gene expression in a dimerization partner-independent manner. It is indispensable for angiogenesis, lymphangiogenesis and embryonic development. Although E2F8 and E2F7 perform complementary and overlapping functions in many cell metabolisms, E2F8, but not E2F7, overexpresses remarkably in hepatocellular carcinoma (HCC) to facilitate the HCC occurrence and development via activating a E2F1/ Cyclin D1 signaling pathway to regulate the G1- to S-phase transition of cell cycle progression or transcriptionally suppressing CDK1 to induce hepatocyte polyploidization...
2017: Journal of Cancer
https://www.readbyqxmd.com/read/28598999/lymphatic-endothelial-progenitors-originate-from-plastic-myeloid-cells-activated-by-toll-like-receptor-4
#8
Lisa D Volk-Draper, Kelly L Hall, Andrew C Wilber, Sophia Ran
BACKGROUND: Myeloid-derived lymphatic endothelial cells (M-LECP) are induced by inflammation and play an important role in adult lymphangiogenesis. However, the mechanisms driving M-LECP differentiation are currently unclear. We previously showed that activation of Toll-like receptor-4 (TLR4) induces myeloid-lymphatic transition (MLT) of immortalized mouse myeloid cells. Here the goals were to assess the potential of different TLR4 ligands to induce pro-lymphatic reprogramming in human and mouse primary myeloid cells and to identify transcriptional changes regulating this process...
2017: PloS One
https://www.readbyqxmd.com/read/28588641/the-significant-pathways-and-genes-underlying-the-colon-cancer-treatment-by-the-traditional-chinese-medicine-phy906
#9
Ziyuan Su, Changyu Zhou, Shaoyou Qin, Erna Jia, Zhenting Wu
BACKGROUND: We attempted to explore the molecular mechanism underlying PHY906 intervention of colon cancer. METHODS: The microarray data of tumors treated by PHY906 and PBS alone were downloaded from the public Gene Expression Omnibus database. The dataset was further analyzed for the differentially expressed genes (DEGs) and their related biological functions were analyzed, followed by function and pathways. Protein-protein interaction (PPI) network was constructed and the significant nodes were screened by network centralities and then the significant modules analysis...
2017: Evidence-based Complementary and Alternative Medicine: ECAM
https://www.readbyqxmd.com/read/28575848/identification-of-srf-e2f1-fusion-transcript-in-ewsr-negative-myoepithelioma-of-the-soft-tissue
#10
Milena Urbini, Annalisa Astolfi, Valentina Indio, Giuseppe Tarantino, Salvatore Serravalle, Maristella Saponara, Margherita Nannini, Alessandro Gronchi, Marco Fiore, Roberta Maestro, Monica Brenca, Angelo Paolo Dei Tos, Gian Paolo Dagrada, Tiziana Negri, Silvana Pilotti, Paolo Giovanni Casali, Guido Biasco, Andrea Pession, Silvia Stacchiotti, Maria Abbondanza Pantaleo
Myoepithelial neoplasms (MN) are rare and not well-circumstanced entities displaying a heterogeneous spectrum of genetic abnormalities, including EWSR1, FUS and PLAG1 rearrangements. However, in the remaining MN no other fusion gene has been described and knowledge concerning secondary acquired molecular alterations is still poor. Therefore, we screened 5 cases of MN of the soft tissue by RNA sequencing with the aim of identifying novel fusion transcripts.A novel SRF-E2F1 fusion was detected in two cases: one was negative for other fusions while the other showed also the presence of FUS-KLF17...
May 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28572744/berberine-regulates-the-protein-expression-of-multiple-tumorigenesis-related-genes-in-hepatocellular-carcinoma-cell-lines
#11
Tung-Yueh Chuang, Hsiao-Li Wu, Jie Min, Michael Diamond, Ricardo Azziz, Yen-Hao Chen
BACKGROUND: Hepatocellular carcinoma (HCC) is the seventh most common malignancy and the third leading cause of cancer-related death worldwide with an extremely grim prognosis. Berberine (BBR) has been found to inhibit proliferation of human HCC cells, although the underlying mechanism(s) are unclear. METHODS: Protein expression was detected by Western blots. Cell viability was determined by using the CellTiter Assay kit. RESULTS: We confirm that BBR treatment inhibits HepG2, Hep3B, and SNU-182 cell viability, and suggest that it regulates this proliferation via the modulation of multiple tumorigenesis-related genes protein expression...
2017: Cancer Cell International
https://www.readbyqxmd.com/read/28569791/e2f1-induces-tincr-transcriptional-activity-and-accelerates-gastric-cancer-progression-via-activation-of-tincr-stau1-cdkn2b-signaling-axis
#12
Tong-Peng Xu, Yan-Fen Wang, Wei-Liang Xiong, Pei Ma, Wen-Yu Wang, Wen-Ming Chen, Ming-De Huang, Rui Xia, Rong Wang, Er-Bao Zhang, Yan-Wen Liu, Wei De, Yong-Qian Shu
Recent evidence indicates that E2F1 transcription factor have pivotal roles in the regulation of cellular processes, and is found to be dysregulated in a variety of cancers. Long non-coding RNAs (lncRNAs) are also reported to exert important effect on tumorigenesis. E2F1 is aberrantly expressed in gastric cancer (GC), and biology functions of E2F1 in GC are controversial. The biological characteristics of E2F1 and correlation between E2F1 and lncRNAs in GC remain to be found. In this study, integrated analysis revealed that E2F1 expression was significantly increased in GC cases and its expression was positively correlated with the poor pathologic stage, large tumor size and poor prognosis...
June 1, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28566697/down-regulated-gata-1-up-regulates-interferon-regulatory-factor-3-in-lung-adenocarcinoma
#13
Lu-Lu Wang, Zheng-Sen Chen, Wen-Di Zhou, Jin Shu, Xiao-Hua Wang, Rui Jin, Li-Li Zhuang, Mir Alireza Hoda, Hao Zhang, Guo-Ping Zhou
Interferon regulatory factor 3 (IRF-3) is widely known for its prompt response against viral infection by activating the interferon system. We previously reported that E2F1, Sp1 and Sp3 regulated transcriptional activity of IRF-3. Recently, different expression patterns of IRF-3 were found in lung cancer, leading to the alternation of the immunomodulatory function in tumorigenesis. However, the mechanism of transcriptional regulation of IRF-3 in lung cancer has not been extensively studied. Here, we investigated the characterization of IRF-3 promoter and found that GATA-1 bound to a specific domain of IRF-3 promoter in vitro and in vivo...
May 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28559983/feedback-between-e2f1-and-cip2a-regulated-by-human-papillomavirus-e7-in-cervical-cancer-implications-for-prognosis
#14
Xiao Wang, Peng Gao, Meng Wang, Jing Liu, Jiaxiang Lin, Shule Zhang, Yiwei Zhao, Jingwen Zhang, Wei Pan, Zeyu Sun, Feifei Sun, Weiming Zhao, Chenghao Guo, Qingwei Wang
Previously, we found that cancerous inhibitor of protein phosphatase 2A (CIP2A) plays a key role in the malignant transformation of cervical cancer. Here, we further explore whether and how CIP2A is regulated by human papillomavirus E7 (HPV E7) and the prognostic value of CIP2A in cervical cancer. We demonstrated a positive feedback loop between the E2F transcription factor 1 (E2F1) and CIP2A at the transcription level in HeLa and SiHa cells by real-time PCR and western blot analysis. The feedback, regulated by HPV E7, was further confirmed by their sub-cellular co-expression seen on immunofluorescence and immunohistochemistry staining in vitro and in vivo...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28542928/crosstalk-between-e2f1-and-p53-transcription-factors-in-doxorubicin-induced-dna-damage-evidence-for-preventive-protective-effects-of-silymarin
#15
Seyedeh-Khadijeh Shafiei-Roudbari, Hassan Malekinejad, Hamed Janbaz-Aciabar, Mazdak Razi
OBJECTIVES: To study the effects of silymarin in various forms of applications on the molecular mechanism(s) of doxorubicin-induced testicular toxicity in male rats. METHODS: Following DOX administration with or without SMN in male rats, sperm quality assays were conducted. Moreover, total antioxidant capacity and nitric oxide content of testis were determined. Expression profile of p53 and E2F1 was analysed by PCR technique. Ultimately, the rate of DNA fragmentation in the testes was quantitatively measured...
May 23, 2017: Journal of Pharmacy and Pharmacology
https://www.readbyqxmd.com/read/28542143/dna-damage-and-s-phase-dependent-e2f1-stabilization-requires-the-ciap1-e3-ubiquitin-ligase-and-is-associated-with-k63-poly-ubiquitination-on-lysine-161-164-residues
#16
Valérie Glorian, Jennifer Allègre, Jean Berthelet, Baptiste Dumetier, Pierre-Marie Boutanquoi, Nathalie Droin, Cémile Kayaci, Jessy Cartier, Simon Gemble, Guillaume Marcion, Daniel Gonzalez, Romain Boidot, Carmen Garrido, Olivier Michaud, Eric Solary, Laurence Dubrez
The E2F transcription factor 1 is subtly regulated along the cell cycle progression and in response to DNA damage by post-translational modifications. Here, we demonstrated that the E3-ubiquitin ligase cellular inhibitor of apoptosis 1 (cIAP1) increases E2F1 K63-poly-ubiquitination on the lysine residue 161/164 cluster, which is associated with the transcriptional factor stability and activity. Mutation of these lysine residues completely abrogates the binding of E2F1 to CCNE, TP73 and APAF1 promoters, thus inhibiting transcriptional activation of these genes and E2F1-mediated cell proliferation control...
May 25, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28515357/e2f1-inhibits-circulating-cholesterol-clearance-by-regulating-pcsk9-expression-in-the-liver
#17
Qiuwen Lai, Albert Giralt, Cédric Le May, Lianjun Zhang, Bertrand Cariou, Pierre-Damien Denechaud, Lluis Fajas
Cholesterol accumulation in the liver is an early event in nonalcoholic fatty liver disease (NAFLD). Here, we demonstrate that E2F1 plays a crucial role in maintaining cellular cholesterol homeostasis by regulating cholesterol uptake via proprotein convertase subtilisin/kexin 9 (PCSK9), an enzyme that promotes low-density lipoprotein receptor (LDLR) degradation upon activation. E2f1-/- mice display reduced total plasma cholesterol levels and increased cholesterol content in the liver. In this study, we show that E2f1 deletion in cellular and mouse models leads to a marked decrease in Pcsk9 expression and an increase in LDLR expression...
May 18, 2017: JCI Insight
https://www.readbyqxmd.com/read/28511966/identification-of-potential-target-genes-and-related-regulatory-transcription-factors-in-spontaneous-hairline-fracture-induced-by-hypervitaminosis-a
#18
Chuangang Peng, Qi Yang, Bo Wei, Yong Liu, Yuxiang Li, Dawei Gu, Guochao Yin, Bo Wang, Dehui Xu, Xuebing Zhang, Daliang Kong
BACKGROUND: The aim was to research the molecular changes of bone cells induced by excessive dose of vitamin A, and analyze molecular mechanism underlying spontaneous fracture. METHODS: The gene expression profile of GSE29859, including 4 cortical bone marrow samples with excessive doses of Vitamin A and 4 control cortical bone marrow samples, was obtained from the Gene Expression Omnibus (GEO) database. Differentially expressed genes (DGEs) between cortical bone marrow samples and control samples were screened out and pathway enrichment analysis was undertaken...
May 2, 2017: Injury
https://www.readbyqxmd.com/read/28504694/the-prohibitin-repressive-interaction-with-e2f1-is-rapidly-inhibited-by-androgen-signalling-in-prostate-cancer-cells
#19
S Koushyar, G Economides, S Zaat, W Jiang, C L Bevan, D A Dart
Prohibitin (PHB) is a tumour suppressor molecule with pleiotropic activities across several cellular compartments including mitochondria, cell membrane and the nucleus. PHB and the steroid-activated androgen receptor (AR) have an interplay where AR downregulates PHB, and PHB represses AR. Additionally, their cellular locations and chromatin interactions are in dynamic opposition. We investigated the mechanisms of cell cycle inhibition by PHB and how this is modulated by AR in prostate cancer. Using a prostate cancer cell line overexpressing PHB, we analysed the gene expression changes associated with PHB-mediated cell cycle arrest...
May 15, 2017: Oncogenesis
https://www.readbyqxmd.com/read/28500630/e2f-is-involved-in-radioresistance-of-carbon-ion-induced-apoptosis-via-bax-caspase-3-signal-pathway-in-human-hepatoma-cell
#20
Xie Yi, S I Jing, Wang Yu-Pei, L I Hong-Yan, D I Cui-Xia, Yan Jun-Fang, Y E Yan-Cheng, Zhang Yan-Shan, Zhang Hong
Deletion of p53, most common genetic alteration, is observed in human tumors and reported to lead to improve in cell radioresistance. Heavy-ion irradiation (IR) could induce p53-/- cancer cells apoptosis. However, little is known regarding the molecular mechanism in this type of cell apoptosis. The present studies have focused on mechanisms state of signaling pathways as an activator of the cell fate decisions induced by heavy ion IR without p53. Carbon ion IR could induce up-regulation of E2F1 expression in cancer cells...
May 13, 2017: Journal of Cellular Physiology
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