scholarly journals ELF1 upregulates MEIS1 to accelerate proliferation, migration and invasion of glioma cells through the GFI1/FBW7 axis

2020 ◽  
Author(s):  
Meixiong Cheng ◽  
Yi Zeng ◽  
Tian Zhang ◽  
Min Xu ◽  
Yaqiu Wu ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Transcription Factors ◽  
Nude Mice ◽  
Cell Apoptosis ◽  
Glioma Cells ◽  
Migration And Invasion ◽  
Differential Analysis ◽  
Regulatory Pathways ◽  
In Vivo Experiments

Abstract Background: To explore whether the transcription factor ELF1 affects the GFI1-FBW7 through MEIS1, thus participating in the occurrence and development of glioma. In this study, key transcription factors were identified by differential analysis of GEO database, and downstream regulatory pathways were predicted by available literature.Methods and results: Based on bioinformatics analysis and existing studies, we speculate that the transcription factor ELF1 may regulate FBW7 through MEIS1-mediated GFI1 and thus affect the occurrence of glioma. The expressions of transcription factors ELF1, MEIS1 and GFI1 were up-regulated in glioma tissues, and the prognosis of glioma patients with high expression of ELF1 was worse.We found that interfering with ELF1 expression in glioma cells can reduce the proliferation, migration and invasion of tumor cells and induce cell apoptosis. The results of Western-blot showed that the expressions of PCNA and MMP9 were decreased, while the expression of cleaved caspase-3 was up-regulated. ChIP experiments showed that ELF1 binds to the MEIS1 promoter region, and MEIS1 can activate the enhancer of GFI1. In vivo experiments were carried out in nude mice, the results showed that interfering ELF1 could inhibit tumor growth in nude mice through the MEIS1-GFI1/FBW7.Conclusion: Therefore, interference of ELF1 in glioma can reduce its ability to recruit the transcription factor MEIS1, and further impair the activation ability of MEIS1 to GFI1 enhancer, which resulting in suppression of proliferation, migration and invasion and induction of cell apoptosis in glioma cells.

scholarly journals Berberine Inhibits Glioma Cell Migration and Invasion by Suppressing TGF-β1/COL11A1 Pathway and Enhances Chemosensitivity

2021 ◽  
Author(s):  
Yuxue Sun ◽  
Haiyan Huang ◽  
Zhixin Zhan ◽  
Haijun Gao ◽  
Chaochao Zhang ◽  
...  
Keyword(s):  
Nude Mice ◽  
Glioma Cell ◽  
High Throughput Sequencing ◽  
Glioma Cells ◽  
Isoquinoline Alkaloid ◽  
Migration And Invasion ◽  
Collagen Accumulation ◽  
Glioma Cell Migration ◽  
Tgf Β1

Abstract Background: The expression of collagen type XI alpha 1 chain (COL11A1) is up-regulated in many cancers, affecting the risk of metastasis, drug resistance, and poor prognosis. Berberine is an isoquinoline alkaloid present in many traditional Chinese medicines and it has been shown to reduce collagen accumulation in pulmonary fibrosis, diabetic nephropathy and arthritis. However, its effect on COL11A1 in glioma needs to be further elucidated.Methods: Western blot was performed to detect the expression level of COL11A1 in several glioma cells, and siCOL11A1 was performed to investigate the effect of COL11A1 on the migration and invasion ability of glioma cells. CCK-8, wound healing experiment and transwell experiment were performed to detect the effect of berberine on the proliferation, migration and invasion of glioma cells. The xenografts experiment in nude mice was performed to test the effect of berberine on inhibiting glioma in vivo.Results: Our results showed that COL11A1 is highly expressed in glioma cell lines and associated with migration, invasion, and chemoresistance of glioma cells. Knocking down COL11A1 caused decreased expression of MMPs, Snail, and MGMT. Berberine could inhibit the migration and invasion of glioma cells by suppressing the TGF-β1/COL11A1 pathway and changes actin cytoskeleton arrangement. In addition, berberine increased the chemosensitivity of glioma cells to temozolomide, which may be related to the down-regulation of Snail and MGMT proteins caused by berberine. High-throughput sequencing of xenografts in nude mice also showed that berberine inhibited the expression of COL11A1 in vivo.Conclusions: Our results suggest that berberine that targets COL11A1 to inhibit glioma migration, invasion and chemoresistance, may serve as a promising candidate for the development of anti-glioma drugs in the future.

scholarly journals CircWHSC1 promotes ovarian cancer progression by regulating MUC1 and hTERT through sponging miR-145 and miR-1182

2019 ◽  
Vol 38 (1) ◽  
Author(s):  
Zhi-Hong Zong ◽  
Yu-Ping Du ◽  
Xue Guan ◽  
Shuo Chen ◽  
Yang Zhao
Keyword(s):  
Ovarian Cancer ◽  
Cancer Progression ◽  
Nude Mice ◽  
Cell Apoptosis ◽  
Cell Function ◽  
Luciferase Reporter ◽  
Migration And Invasion ◽  
Circular Rnas ◽  
Cancer Tissues

Abstract Background Circular RNAs are key regulators in human cancers, however, there is a lack of studies on circRNAs’ specific functions in ovarian cancer. Methods Our study used qRT-PCR to detect the differentially expressed circRNAs between normal ovaries and ovarian cancer tissues. Cell function experiments were performed to verify the role of overexpression and silence of circWHSC1, including MTT assay, cell apoptosis assay, wound healing and Matrigel-coated Transwell assay. In vivo tumorigenesis model was constructed by subcutaneous injection in nude mice. Bioinformatics analysis predicted the possible binding sites of circWHSC1 with miRNAs, and confirmed with dual-luciferase reporter assay and RNA pull-down assay. The exosomes were extracted with ultracentrifugation. HE staining was also used to detect morphology of nude mice peritoneum. Results We found that circWHSC1 was up-regulated in ovarian cancer tissues, and circWHSC1 expression was higher in moderate & poor differentiation ovarian cancer tissues than in well differentiation ovarian cancer tissues. Overexpression of circWHSC1 increased cell proliferation, migration and invasion, and inhibited cell apoptosis. Silence of circWHSC1 exerted the opposite effects. Additionally, circWHSC1 could sponge miR-145 and miR-1182 and up-regulate the expression of downstream targets MUC1 and hTERT. Exosomal circWHSC1 can be transferred to peritoneal mesothelial cells and promotes peritoneal dissemination. Conclusions Our study demonstrates the highly expressed circWHSC1 in ovarian cancer promotes tumorigenesis by sponging miR-145 and miR-1182, and its exosome forms induce tumor metastasis through acting on peritoneal mesothelium.

scholarly journals Long Non-Coding RNA LINC00663 Promotes Gliomagenesis and Progression

2020 ◽  
Author(s):  
Meichen Pan ◽  
Jingren Shi ◽  
Shangqi Yin ◽  
Huan Meng ◽  
Chaonan He ◽  
...  
Keyword(s):  
Glioma Cells ◽  
Migration And Invasion ◽  
High Morbidity ◽  
Akt Activation ◽  
In Vivo Experiments ◽  
Dismal Prognosis ◽  
Non Coding Rna ◽  
Long Non Coding Rna

Abstract Background: Glioma is the most frequent primary malignant brain tumor, characterized by high morbidity, high mortality and dismal prognosis. Numerous analyses have revealed the abnormal expression of long non-coding RNAs (lncRNAs) in glioma cells. This study aims to explore its role in glioma development and prognosis.Methods: The gene expression in cell lines were measured by qRT-PCR. The role of LINC00663 in glioma was confirmed by CCK8, EdU assay, transwell and western blot as well as by in vivo experiments. Besides, Pearson's correlation analysis and Kyoto Encyclopedia of Genes and Genomes (KEGG) analysis were also performed as needed.Results: Firstly, data from our preliminary work (NSFC NO. 81572474) showed that LINC00663 might be largely implicated in glioma. Meanwhile, LINC00663 upregulation confirmed in glioma predicted poor clinical outcomes. Functionally, LINC00663 knockdown restrained cell proliferation, migration and invasion in vitro. Mechanistic investigations validated that LINC00663 silencing decreased AKT activation in glioma cells.Conclusions: LINC00663 promotes glioma development and progression through regulating AKT pathway, suggesting LINC00663 as a probable target for glioma treatment.

scholarly journals Long non-coding RNA PAXIP1-AS1 facilitates cell invasion and angiogenesis of glioma by recruiting transcription factor ETS1 to upregulate KIF14 expression

2019 ◽  
Vol 38 (1) ◽  
Author(s):  
Haiyang Xu ◽  
Guifang Zhao ◽  
Yu Zhang ◽  
Hong Jiang ◽  
Weiyao Wang ◽  
...  
Keyword(s):  
Transcription Factor ◽  
Cell Invasion ◽  
Promoter Activity ◽  
Umbilical Vein ◽  
Glioma Cells ◽  
Migration And Invasion ◽  
Interacting Protein ◽  
Umbilical Vein Endothelial Cells

Abstract Background Gliomas are common life-threatening cancers, mainly due to their aggressive nature and frequent invasiveness and long non-coding RNAs (lncRNAs) are emerging as promising molecular targets. Therefore, we explored the regulatory mechanisms underlying the putative involvement of the lncRNA PAX-interacting protein 1- antisense RNA1/ETS proto-oncogene 1/kinesin family member 14 (PAXIP1-AS1/ETS1/KIF14) axis in glioma cell invasion and angiogenesis. Methods Firstly, we identified differentially expressed lncRNA PAXIP1-AS1 as associated with glioma based on bioinformatic data. Then, validation experiments were conducted to confirm a high expression level of lncRNA PAXIP1-AS1 in glioma tissues and cells, accompanied by upregulated KIF14. We further examined the binding between lncRNA PAXIP1-AS1, KIF14 promoter activity, and transcription factor ETS1. Next, overexpression vectors and shRNAs were delivered to alter the expression of lncRNA PAXIP1-AS1, KIF14, and ETS1 to analyze their effects on glioma progression in vivo and in vitro. Results LncRNA PAXIP1-AS1 was mainly distributed in the nucleus of glioma cells. LncRNA PAXIP1-AS1 could upregulate the KIF14 promoter activity by recruiting transcription factor ETS1. Overexpression of lncRNA PAXIP1-AS1 enhanced migration, invasion, and angiogenesis of human umbilical vein endothelial cells in glioma by recruiting the transcription factor ETS1 to upregulate the expression of KIF14, which was further confirmed by accelerated tumor growth in nude mice. Conclusions The key findings of this study highlighted the potential of the lncRNA PAXIP1-AS1/ETS1/KIF14 axis as a therapeutic target for glioma treatment, due to its role in controlling the migration and invasion of glioma cells and its angiogenesis.

scholarly journals Obesity Potentiates Esophageal Squamous Cell Carcinoma Growth and Invasion by AMPK-YAP Pathway

2020 ◽  
Vol 2020 ◽  
pp. 1-9
Author(s):  
Jia-Huang Liu ◽  
Qi-Fei Wu ◽  
Jun-Ke Fu ◽  
Xiang-Ming Che ◽  
Hai-Jun Li
Keyword(s):  
Cell Proliferation ◽  
Squamous Cell Carcinoma ◽  
Esophageal Squamous Cell Carcinoma ◽  
Cell Carcinoma ◽  
Nude Mice ◽  
Serum Glucose ◽  
Migration And Invasion ◽  
Endocrine Effect

Obesity could increase the risk of esophageal squamous cell carcinoma (ESCC) and affect its growth and progression, but the mechanical links are unclear. The objective of the study was to explore the impact of obesity on ESCC growth and progression utilizing in vivo trials and cell experiments in vitro. Diet-induced obese and lean nude mice were inoculated with TE-1 cells, then studied for 4 weeks. Serum glucose, insulin, leptin, and visfatin levels were assayed. Sera of nude mice were obtained and then utilized to culture TE-1. MTT, migration and invasion assays, RT-PCR, and Western blotting were used to analyze endocrine effect of obesity on cell proliferation, migration, invasion, and related genes expression of TE-1. Obese nude mice bore larger tumor xenografts than lean animals, and were hyperglycemic and hyperinsulinemic with an elevated level of leptin and visfatin in sera, and also were accompanied by a fatty liver. As for the subcutaneous tumor xenograft model, tumors were more aggressive in obese nude mice than lean animals. Tumor weight correlated positively with mouse body weight, liver weight of mice, serum glucose, HOMA-IR, leptin, and visfatin. Obesity prompted significant TE-1 cell proliferation, migration, and invasion by endocrine mechanisms and impacted target genes. The expression of AMPK and p-AMPK protein decreased significantly ( P < 0.05 ); MMP9, total YAP, p-YAP, and nonphosphorylated YAP protein increased significantly ( P < 0.05 ) in the cells cultured with conditioned media and xenograft tumor from the obese group; the mRNA expression of AMPK decreased significantly ( P < 0.05 ); YAP and MMP9 mRNA expression increased significantly ( P < 0.05 ) in the cells exposed to conditioned media from the obese group. In conclusion, the altered adipokine milieu and metabolites in the context of obesity may promote ESCC growth in vivo; affect proliferation, migration, and invasion of ESCC cells in vitro; and regulate MMP9 and AMPK-YAP signaling pathway through complex effects including the endocrine effect.

Subnuclear compartmentalization of sequence-specific transcription factors and regulation of eukaryotic gene expression

2005 ◽  
Vol 83 (4) ◽  
pp. 535-547 ◽  
Author(s):  
Gareth N Corry ◽  
D Alan Underhill
Keyword(s):  
Gene Expression ◽  
Transcription Factor ◽  
Transcription Factors ◽  
Transcriptional Activation ◽  
Current Knowledge ◽  
Nuclear Architecture ◽  
Subnuclear Localization ◽  
Modular Structures

To date, the majority of the research regarding eukaryotic transcription factors has focused on characterizing their function primarily through in vitro methods. These studies have revealed that transcription factors are essentially modular structures, containing separate regions that participate in such activities as DNA binding, protein–protein interaction, and transcriptional activation or repression. To fully comprehend the behavior of a given transcription factor, however, these domains must be analyzed in the context of the entire protein, and in certain cases the context of a multiprotein complex. Furthermore, it must be appreciated that transcription factors function in the nucleus, where they must contend with a variety of factors, including the nuclear architecture, chromatin domains, chromosome territories, and cell-cycle-associated processes. Recent examinations of transcription factors in the nucleus have clarified the behavior of these proteins in vivo and have increased our understanding of how gene expression is regulated in eukaryotes. Here, we review the current knowledge regarding sequence-specific transcription factor compartmentalization within the nucleus and discuss its impact on the regulation of such processes as activation or repression of gene expression and interaction with coregulatory factors.Key words: transcription, subnuclear localization, chromatin, gene expression, nuclear architecture.

scholarly journals Sevoflurane inhibits malignant progression of colorectal cancer via hsa_circ_0000231-mediated miR-622

2021 ◽  
Vol 28 (1) ◽  
Author(s):  
Jingpeng Wang ◽  
Shuyuan Li ◽  
Gaofeng Zhang ◽  
Huihua Han
Keyword(s):  
Colorectal Cancer ◽  
Cell Proliferation ◽  
Cell Apoptosis ◽  
Volatile Anesthetic ◽  
Tumor Formation ◽  
Luciferase Reporter ◽  
Migration And Invasion ◽  
Circular Rnas

Abstract Background Sevoflurane (Sev), a commonly used volatile anesthetic, has been reported to inhibit the process of colorectal cancer (CRC). Circular RNAs (circRNAs) are revealed to participate in the pathogenesis of CRC. This study aims to reveal the mechanism of hsa_circ_0000231 in Sev-mediated CRC progression. Methods The expression of hsa_circ_0000231 and microRNA-622 (miR-622) was detected by quantitative real-time polymerase chain reaction (qRT-PCR). Protein level was determined by western blot analysis. Cell proliferation was investigated by 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT), cell colony formation and DNA content quantitation assays. Cell apoptosis was detected by Annexin V-fluorescein isothiocyanate and propidium iodide double staining and caspase 3 activity assays. Cell migration and invasion were investigated by wound-healing and transwell invasion assays, respectively. The putative relationship between hsa_circ_0000231 and miR-622 was predicted by circular RNA Interactome online database, and identified by dual-luciferase reporter and RNA immunoprecipitation assays. The impacts of hsa_circ_0000231 on Sev-mediated tumor formation in vivo were presented by in vivo assay. Results Hsa_circ_0000231 expression was upregulated, while miR-622 was downregulated in CRC tissues and cells compared with control groups. Sev treatment decreased hsa_circ_0000231 expression, but increased miR-622 expression in CRC cells. Sev treatment suppressed cell proliferation, migration and invasion, and induced cell apoptosis. Hsa_circ_0000231 overexpression restored Sev-mediated CRC progression in vitro. Additionally, hsa_circ_0000231 acted as a sponge of miR-622, and miR-622 inhibitors reversed the impacts of hsa_circ_0000231 silencing on CRC process. Furthermore, Sev treatment inhibited tumor growth by regulating hsa_circ_0000231 in vivo. Conclusion Hsa_circ_0000231 attenuated Sev-aroused repression impacts on CRC development by sponging miR-622. This findings may provide an appropriate anesthetic protocol for CRC sufferers undergoing surgery.

Anti-glioma Efficacy and Mechanism of Action of Tripolinolate A from Tripolium pannonicum

Planta Medica ◽  
2018 ◽  
Vol 84 (11) ◽  
pp. 786-794
Author(s):  
Weiyun Chai ◽  
Lu Chen ◽  
Xiao-Yuan Lian ◽  
Zhizhen Zhang
Keyword(s):  
Cell Cycle ◽  
Transcription Factors ◽  
Glioma Cells ◽  
Inhibitory Effect ◽  
Cell Cycle Regulators ◽  
Expression Levels ◽  
Multiple Tumor ◽  
Glioma Growth

AbstractTripolinolate A as a new bioactive phenolic ester was previously isolated from a halophyte of Tripolium pannonicum. However, the in vitro and in vivo anti-glioma effects and mechanism of tripolinolate A have not been investigated. This study has demonstrated that (1) tripolinolate A inhibited the proliferation of different glioma cells with IC50 values of 7.97 to 14.02 µM and had a significant inhibitory effect on the glioma growth in U87MG xenograft nude mice, (2) tripolinolate A induced apoptosis in glioma cells by downregulating the expressions of antiapoptotic proteins and arrested glioma cell cycle at the G2/M phase by reducing the expression levels of cell cycle regulators, and (3) tripolinolate A also remarkably reduced the expression levels of several glioma metabolic enzymes and transcription factors. All data together suggested that tripolinolate A had significant in vitro and in vivo anti-glioma effects and the regulation of multiple tumor-related regulators and transcription factors might be responsible for the activities of tripolinolate A against glioma.

scholarly journals RON Mediates Tumor-Promoting Effects in Endometrial Adenocarcinoma

2021 ◽  
Vol 2021 ◽  
pp. 1-10
Author(s):  
Qin Yu ◽  
Jianzhang Wang ◽  
Tiantian Li ◽  
Xinxin Xu ◽  
Xinyue Guo ◽  
...  
Keyword(s):  
Nude Mice ◽  
Reproductive Tract ◽  
Epithelial Mesenchymal Transition ◽  
Endometrial Adenocarcinoma ◽  
Female Reproductive Tract ◽  
Migration And Invasion ◽  
Smad Pathway ◽  
Mesenchymal Transition ◽  
Adenocarcinoma Cells

Endometrial adenocarcinoma is one of the most prevalent female reproductive tract cancers in the world, and the development of effective treatment is still the main goal of its current research. Epithelial-mesenchymal transition (EMT) plays a significant part in the occurrence and development of epithelial carcinoma, including endometrial adenocarcinoma. Recepteur d’origine nantais (RON) induces EMT and promotes proliferation, migration, and invasion in various epithelial-derived cancers, but its role in endometrial adenocarcinoma is still poorly studied. The purpose of this study is to verify the overexpression of RON in endometrial adenocarcinoma and to explore its specific roles. RON expression in tumor lesions was verified by immunohistochemical staining, HEC-1B cells were used to construct stable cell lines with RON overexpression or knockdown to investigate the effects of RON on the function of endometrial adenocarcinoma cells, and xenotransplantation experiment was carried out in nude mice to explore the effect of RON on the growth of endometrial adenocarcinoma in vivo. This study revealed that RON could promote the proliferation, migration, and invasion of HEC-1B cells and induce EMT, and these effects were regulated through the Smad pathway. RON overexpression could promote growth of endometrial adenocarcinoma cells in nude mice, while its inhibitor BMS777607 could restrict this role. RON played an important role in endometrial adenocarcinoma and had a potential to become a new therapeutic target for endometrial adenocarcinoma.

scholarly journals Curcumol inhibits malignant biological behaviors and TMZ-resistance of glioma cells via reducing long noncoding RNA FoxD2-As1 promoted EZH2 activation

2021 ◽  
Author(s):  
Xuyang Lv ◽  
Jiangchuan Sun ◽  
Linfeng Hu ◽  
Ying Qian ◽  
Chunlei Fan ◽  
...  
Keyword(s):  
Cell Proliferation ◽  
Noncoding Rna ◽  
Glioma Cell ◽  
Glioma Cells ◽  
Migration And Invasion ◽  
Dependent Manner ◽  
Antitumor Effects ◽  
Self Renewal

Abstract Background: Although curcumol has been shown to possess antitumor effects in several cancers, its effects on glioma are largely unknown. Recently, lncRNAs have been reported to play an oncogenic role through epigenetic modifications. Therefore, here, we investigated whether curcumol inhibited glioma progression by reducing FOXD2-AS1-mediated enhancer of zeste homolog 2 (EZH2) activation.Methods: MTT, colony formation, flow cytometry, Transwell, and neurosphere formation assays were used to assess cell proliferation, cell cycle, apoptosis, the percentage of CD133+ cells, the migration and invasion abilities, and the self-renewal ability. qRT-PCR, western blotting, immunofluorescence, and immunohistochemical staining were used to detect mRNA and protein levels. Isobologram analysis and methylation-specific PCR were used to analyze the effects of curcumol on TMZ resistance in glioma cells. DNA pull-down and Chip assays were employed to explore the molecular mechanism underlying the functions of curcumol in glioma cells. Tumorigenicity was determined using a xenograft formation assay. Results: Curcumol inhibited the proliferation, metastasis, self-renewal ability, and TMZ resistance of glioma cells in vitro and in vivo. FOXD2-AS1 was highly expressed in glioma cell lines, and its expression was suppressed by curcumol treatment in a dose- and time-dependent manner. The forced expression of FOXD2-AS1 abrogated the effect of curcumol on glioma cell proliferation, metastasis, self-renewal ability, and TMZ resistance. Moreover, the forced expression of FOXD2-AS1 reversed the inhibitory effect of curcumol on EZH2 activation.Conclusions: We showed for the first time that curcumol is effective in inhibiting malignant biological behaviors and TMZ-resistance of glioma cells by suppressing FOXD2-AS1-mediated EZH2 activation on anti-oncogenes. Our findings offer the possibility of exploiting curcumol as a promising therapeutic agent for glioma treatment and may provide an option for the clinical application of this natural herbal medicine.

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