microRNA-137 downregulates MCL1 in ovarian cancer cells and mediates cisplatin-induced apoptosis

2020 ◽  
Vol 21 (3) ◽  
pp. 195-207 ◽  
Author(s):  
Wei Chen ◽  
Jingjie Du ◽  
Xiaodi Li ◽  
Ziming Zhi ◽  
Songshan Jiang
Keyword(s):  
Ovarian Cancer ◽  
Cancer Cells ◽  
Transcriptome Sequencing ◽  
Luciferase Reporter Assay ◽  
Luciferase Assay ◽  
Luciferase Reporter ◽  
Ovarian Cancer Cells ◽  
Reporter Assay ◽  
Apoptotic Proteins ◽  
Induced Apoptosis

Aim: miR-137 is downregulated in various cancers; however, its function in ovarian cancer remains unclear. Methods: The roles of miR-137 in apoptosis were accessed through IC50 values and DAPI assay. The regulation of MCL1 by miR-137 was investigated through luciferase reporter assay and immunoblot. Results: miR-137 mimic could decrease the IC50 value of cisplatin and promote apoptosis in OVCAR3 ovarian cancer cells. Using luciferase assay, results on a panel of anti-apoptotic proteins, we identified MCL1 as a target for miR-137 and the results were confirmed using immunoblot. Finally, the underlying pathway in which miR-137 may be involved was investigated by transcriptome sequencing. Conclusion: These results suggest that miR-137 downregulates MCL1 in ovarian cancer cells and mediates cisplatin-induced apoptosis.

scholarly journals MiR-425-5p accelerated the proliferation, migration, and invasion of ovarian cancer cells via targeting AFF4

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Zhihui Wu ◽  
Jianlin Guo ◽  
Ying Zhang ◽  
Jianhua Liu ◽  
Hongping Ma ◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Luciferase Reporter Assay ◽  
Cell Counting ◽  
Luciferase Assay ◽  
Luciferase Reporter ◽  
Migration And Invasion ◽  
Ovarian Cancer Cells ◽  
Reporter Assay ◽  
Matrigel Invasion

Abstract Background Accumulating data have established that microRNAs (miRNAs) play significant regulatory roles in the carcinogenesis and progression of ovarian cancer (OC). MiR-425-5p was reported to function in various tumors. However, the roles and underlying mechanism of miR-425-5p involvement in OC development and progression are unclear. Methods A comprehensive strategy of data mining, computational biology, and real-time polymerase chain reaction was employed to identify the involvement of miR-425-5p in OC progression. The effect of miR-425-5p on the proliferation, migration, and invasion of OC cells was determined using Cell Counting Kit-8, wound-healing, and Matrigel invasion assays, respectively. Luciferase assay was performed to evaluate the interactions between miR-425-5p and MAGI2-AS3 or AFF4. Results miR-425-5p was significantly up-regulated in OC tissues and cells. The luciferase reporter assay revealed that miR-425-5p was negatively regulated by MAGI2-AS3. Silencing miR-425-5p inhibited the proliferation, migration, and invasion of OC cells in vitro. Bioinformatics analysis and luciferase reporter assay revealed that AFF4 was the target gene of miR-425-5p. Moreover, AFF4 expression was significantly decreased in OC and was closely related to the good prognosis of patients with OC. AFF4 overexpression inhibited the proliferation, migration, and invasion of OC cells in vitro. By contrast, silencing AFF4 promoted the proliferation, migration, and invasion of OC cells in vitro. Finally, AFF4 suppression rescued the inhibitory effect of silencing miR-425-5p on the proliferation, migration, and invasion of OC cells. Conclusion To the best our knowledge, this is the first study to demonstrate that miR-425-5p overexpression in OC is negatively regulated by MAGI2-AS3. Moreover, miR-425-5p promotes the proliferation, migration, and invasion of OC cells by targeting AFF4, suggesting that miR-425-5p/AFF4 signaling pathway represented a novel therapeutic target for patients with OC.

scholarly journals Long Non-coding RNA CCAT1 Sponges miR-454 to Promote Chemoresistance of Ovarian Cancer Cells to Cisplatin by Regulation of Surviving

2020 ◽  
Vol 52 (3) ◽  
pp. 798-814 ◽  
Author(s):  
De-Ying Wang ◽  
Na Li ◽  
Yu-Lan Cui
Keyword(s):  
Ovarian Cancer ◽  
Cancer Cells ◽  
Ovarian Cancer Cell Line ◽  
Luciferase Reporter ◽  
Ovarian Cancer Cells ◽  
Qrt Pcr ◽  
Non Coding Rna ◽  
Induced Apoptosis ◽  
Long Non Coding Rna

PurposeColon cancer-associated transcript 1 (CCAT1) was identified as an oncogenic long non-coding RNA (lncRNA) in a variety of cancers. However, there was a lack of understanding of the mechanism by which CCAT1 conferred cisplatin (also known as DDP) resistance in ovarian cancer cells.Materials and MethodsCell viability of A2780, SKOV3, A2780/DDP, and SKOV3/DDP cells upon cisplatin treatment was monitored by MTT assay. Quantitative reverse transcription polymerase chain reaction (qRT-PCR) detected the expression levels of CCAT1 and miR-454. The effect of sh-CCAT1 on cisplatin response was investigated in xenografts study. Bioinformatic analysis, luciferase reporter assay and qRT-PCR were conducted to validate the direct interaction among CCAT1, miR-454, and survivin. Apoptosis was determined by flow cytometry after dual staining of Annexin-V-FITC/propidium iodide, and the expression of apoptosis-related proteins Bcl-2, Bax and survivin were detected by qRT-PCR and Western blotting. Xenograft study was conducted to monitor <i>in vivo</i> tumor formation.ResultsCCAT1 was highly expressed in cisplatin-resistant ovarian cancer cell line A2780/DDP and SKOV3/DDP. Knockdown of CCAT1 restored sensitivity to cisplatin <i>in vitro</i> and <i>in vivo</i>. Our data revealed that silencing of CCAT1 promoted cisplatin-induced apoptosis via modulating the expression of pro- or anti-apoptotic proteins Bax, Bcl-2, and survivin. CCAT1 directly interacted with miR-454, and miR-454 overexpression potentiated cisplatin-induced apoptosis. Survivin was identified as a functional target of miR-454, restoration of survivin attenuated the effect of miR-454 on cisplatin response. In addition, miR-454 inhibitor or overexpression of survivin was found to abolish sh-CCAT1–induced apoptosis upon cisplatin treatment.ConclusionCCAT1/miR-454/survivin axis conferred cisplatin resistance in ovarian cancer cells.

scholarly journals miR-454 suppresses the proliferation and invasion of ovarian cancer by targeting E2F6

2020 ◽  
Author(s):  
Yunhe An ◽  
Jun Zhang ◽  
Yanjie Tian ◽  
Baoming Li ◽  
Xiaoyan Cheng ◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Cell Proliferation ◽  
Cancer Cells ◽  
Cancer Patients ◽  
Luciferase Reporter ◽  
Ovarian Cancer Cells ◽  
Reporter Assay ◽  
Cancer Tissues ◽  
Dual Luciferase Reporter Assay

Abstract Background The aberrant expression of microRNA-454 (miR-454) has been confirmed to be involved in the development of cancers. However, the functional role of miR-454 in the progression of ovarian cancer remains unclear. Methods The expression of miR-454 in ovarian cancer cells and serum of ovarian cancer patients was detected by RT-PCR. CCK8, colony formation, transwell, and flow cytometry assays were conducted to assess the effects of miR-454 on ovarian cancer cell proliferation, migration, invasion, and apoptosis, respectively. Dual-luciferase reporter assay was used to confirm the targeting relationship between miR-454 and E2F6. The expression pattern of E2F6 in ovarian cancer tissues was detected using immunohistochemistry (IHC) assay. The relative expression of related proteins was examined using western blot analysis. Results miR-454 was markedly down-regulated by hypoxia in ovarian cancer cells. Compared with normal samples, the expression of miR-454 was up-regulated in the serum of ovarian cancer patients, and correlated with the clinicopathological stages of ovarian cancer. Next, we found that miR-454 overexpression inhibited the proliferation, migration and invasion of OVCAR3 and SKOV3 cells, as well as promoted apoptosis. In addition, the Akt/mTOR and Wnt/β-catenin signaling pathway were inhibited by miR-454 in ovarian cancer cells. Mechanically, bioinformatic analysis and dual-luciferase reporter assay confirmed that E2F6 was a direct target of miR-454 and negatively regulated by miR-454 in ovarian cancer cells. Moreover, IHC analysis showed that E2F6 was highly expressed in ovarian cancer tissues. Finally, we found that the increasing cell proliferation and migration triggered by E2F6 overexpression were abolished by miR-454 overexpression. Conclusion Taken together, these results highlight the role of miR-454 as a tumor suppressor in ovarian cancer cells by targeting E2F6, indicating that miR-454 may be a potential diagnostic biomarker and therapeutic target for ovarian cancer.

scholarly journals miR-454 suppresses the proliferation and invasion of ovarian cancer by targeting E2F6

2020 ◽  
Author(s):  
Yunhe An ◽  
Jun Zhang ◽  
Yanjie Tian ◽  
Baoming Li ◽  
Xiaoyan Cheng ◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Cell Proliferation ◽  
Cancer Cells ◽  
Cancer Patients ◽  
Luciferase Reporter ◽  
Ovarian Cancer Cells ◽  
Reporter Assay ◽  
Cancer Tissues ◽  
Dual Luciferase Reporter Assay

Abstract Background: It has been reported that hypoxia is closely related to the tumor malignancy and recurrence and regulates multiple hub genes in ovarian cancer. MicroRNA-454 (miR-454) has been confirmed to be involved in tumorigenesis and tumor development. However, the functional role of miR-454 in ovarian cancer remains unclear.Methods: The expression of miR-454 in ovarian cancer cells and serum of ovarian cancer patients was detected by RT-PCR. CCK8, colony formation, transwell, and flow cytometry assays were conducted to assess the effects of miR-454 on ovarian cancer cell proliferation, migration, invasion, and apoptosis. Dual-luciferase reporter assay was used to confirm the targeting relationship between miR-454 and E2F6. The expression pattern of E2F6 in ovarian cancer tissues was detected using immunohistochemistry assay. The relative expression of related proteins was examined using western blot analysis.Results: miR-454 was markedly down-regulated by hypoxia in ovarian cancer cells. Compared with normal serum, the expression of miR-454 was up-regulated in the serum of ovarian cancer patients, and was correlated with the clinicopathological stage of ovarian cancer patients. Next, we found that miR-454 overexpression inhibited the proliferation, migration and invasion of OVCAR3 and SKOV3 cells, as well as promoted apoptosis. In addition, the Akt/mTOR and Wnt/β-catenin signaling pathway were inhibited by miR-454. Bioinformatic analysis and dual-luciferase reporter assay confirmed that E2F6 was a target of miR-454 and negatively regulated by miR-454 in ovarian cancer cells. Moreover, immunohistochemical analysis showed that E2F6 was highly expressed in ovarian cancer tissues. Finally, we found that the increasing cell proliferation and migration triggered by E2F6 overexpression were abolished by miR-454 overexpression.Conclusion: Taken together, these results highlight the role of miR-454 as a tumor suppressor in ovarian cancer by targeting E2F6, indicating that the hypoxia/miR-454/E2F6 pathway may be a novel therapeutic approach for ovarian cancer.

Butein Shows Cytotoxic Effects and Induces Apoptosis in Human Ovarian Cancer Cells

2015 ◽  
Vol 43 (04) ◽  
pp. 769-782 ◽  
Author(s):  
Pei-Yu Yang ◽  
Dan-Ning Hu ◽  
I-Ching Lin ◽  
Fu-Shing Liu
Keyword(s):  
Ovarian Cancer ◽  
Cytochrome C ◽  
Cancer Cells ◽  
Mtt Assay ◽  
Human Cancer ◽  
Ovarian Cancer Cells ◽  
Human Ovarian Cancer ◽  
Dependent Manner ◽  
Apoptotic Proteins ◽  
Induced Apoptosis

Butein is a polyphenol, one of the compounds of chalcones, which are flavonoids that are widely biosynthesized in plants, and exhibits different pharmacological activities. Plants containing butein have been used in Chinese traditional medicine. Recently, it has been reported that butein suppresses proliferation and triggers apoptosis in various human cancer cells in vitro and in vivo. The aim of this study was to investigate its pro-apoptotic effect and mechanisms in two cultured human ovarian cancer cells (ES-2 and TOV-21G). The effects of butein on cell viability were assessed by a MTT assay at 3, 10, 30, and 100 μ/M. The apoptotic pathway related factors, including the mitochondrial transmembrane potential (MTP), cytochrome c, caspase cascade, and Bcl-2 family proteins, were examined. MTT assay revealed that butein was cytotoxic to both ovarian cancer cells in a dose- and time-dependent manner. JC-1 flow cytometry, cytochrome c, and caspase activity assays revealed that butein damaged the MTP, increased the level of cytosol cytochrome c and the activities of caspase-3, -8, and -9 in the two ovarian cancer cells. Western blot analysis revealed that butein down-regulated the anti-apoptotic proteins Bcl-2 and Bcl-xL and increased the pro-apoptotic proteins Bax and Bad. These findings suggest that butein-induced apoptosis in ovarian cancer cells via the activation of both extrinsic and intrinsic pathways. In addition, butein also down-regulated the expressions of the inhibitor of apoptosis (IAP) proteins, XIAP, survivin, CIAP-1, and CIAP-2. This indicates that the inhibition of IAP proteins was also involved in butein-induced apoptosis. The results of our study suggest that butein may be a promising anticancer agent in treating ovarian cancer.

scholarly journals Ginsenoside 20(S)-Rg3 Prevents PKM2-Targeting miR-324-5p from H19 Sponging to Antagonize the Warburg Effect in Ovarian Cancer Cells

2018 ◽  
Vol 51 (3) ◽  
pp. 1340-1353 ◽  
Author(s):  
Xia Zheng ◽  
Yuanyuan Zhou ◽  
Wei Chen ◽  
Lihong Chen ◽  
Jiaojiao Lu ◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Cancer Cells ◽  
Warburg Effect ◽  
Lactate Production ◽  
Glucose Consumption ◽  
Luciferase Reporter ◽  
Ovarian Cancer Cells ◽  
Reporter Assay ◽  
Dual Luciferase Reporter Assay ◽  
The Warburg Effect

Background/Aims: The Warburg effect is one of the main metabolic features for cancers, with long non-coding RNA (lncRNA) being involved as a class of crucial regulators. Our previous studies have shown that ginsenoside 20(S)-Rg3, an active saponin monomer extracted from red ginseng, inhibits the Warburg effect in ovarian cancer cells. However, the detailed lncRNA regulatory network modulated by 20(S)-Rg3 to prevent the Warburg effect in ovarian cancer cells has not been explored. Methods: High-throughput sequencing was used to screen out the differentially expressed lncRNAs between 20(S)-Rg3-treated and non-treated SKOV3 cells. The levels of lncRNA H19 and miR-324-5p were manipulated in SKOV3 and A2780, and the glucose consumption, lactate production and PKM2 protein level were detected. Dual-luciferase reporter assay and RIP were utilized to verify the direct binding of H19 to miR-324-5p and miR-324-5p to PKM2. Cell proliferation was examined by CCK8 and colony formation assay. Nude mice subcutaneous xenograft tumor models were established to evaluate the impact of miR-324-5p on tumor growth in vivo. Results: 20(S)-Rg3 downregulated 67 lncRNAs, and H19 was one of the most decreased lncRNAs. Suppression of H19 by siRNA transfection reduced glucose consumption, lactate production and PKM2 expression in ovarian cancer cells, while H19 overexpression in 20(S)-Rg3-treated ovarian cancer cells enhanced glucose consumption, lactate production and PKM2 expression. Dual-luciferase reporter assay and RIP results showed that H19 directly bound to miR-324-5p. Dual-luciferase reporter assay showed that miR-324-5p directly targeted PKM2, and miR-324-5p negatively regulated glucose consumption and lactate production in ovarian cancer cells. miR-324-5p overexpression inhibited cell proliferation in vitro and in vivo. Conclusion: Our study revealed that 20(S)-Rg3 blocked the competitive inhibition of H19 on miR-324-5p, which enhanced the suppression of miR-324-5p on PKM2 and therefore inhibited the Warburg effect and repressed tumorigenesis. In a word, 20(S)-Rg3 inhibited the Warburg effect in ovarian cancer cells via H19/miR-324-5p/PKM2 pathway.

scholarly journals Propofol suppresses cell viability, cell cycle progression and motility and induces cell apoptosis of ovarian cancer cells through suppressing MEK/ERK signaling via targeting circVPS13C/miR-145 axis

2021 ◽  
Vol 14 (1) ◽  
Author(s):  
Huan Lu ◽  
Guanlin Zheng ◽  
Xiang Gao ◽  
Chanjuan Chen ◽  
Min Zhou ◽  
...  
Keyword(s):  
Cell Cycle ◽  
Ovarian Cancer ◽  
Cancer Cells ◽  
Rna Binding ◽  
Erk Signaling ◽  
Luciferase Reporter ◽  
Migration And Invasion ◽  
Ovarian Cancer Cells ◽  
Dependent Manner ◽  
Vacuolar Protein

Abstract Background Propofol is a kind of common intravenous anaesthetic agent that plays an anti-tumor role in a variety of cancers, including ovarian cancer. However, the working mechanism of Propofol in ovarian cancer needs further exploration. Methods The viability and metastasis of ovarian cancer cells were assessed by 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay and transwell assays. Flow cytometry was used to evaluate the cell cycle and apoptosis. Quantitative real-time polymerase chain reaction (qRT-PCR) was used to examine the abundance of circular RNA vacuolar protein sorting 13 homolog C (circVPS13C) and microRNA-145 (miR-145). The target relationship between miR-145 and circVPS13C was predicted by circinteractome database and verified by dual-luciferase reporter assay, RNA-binding protein immunoprecipitation (RIP) assay and RNA-pull down assay. Western blot assay was used to detect the levels of phosphorylated extracellular regulated MAP kinase (p-ERK), ERK, p-MAP kinse-ERK kinase (p-MEK) and MEK, in ovarian cancer cells. Results Propofol treatment suppressed the viability, cell cycle and motility and elevated the apoptosis rate of ovarian cancer cells. Propofol up-regulated miR-145 in a dose-dependent manner. Propofol exerted an anti-tumor role partly through up-regulating miR-145. MiR-145 was a direct target of circVPS13C. Propofol suppressed the progression of ovarian cancer through up-regulating miR-145 via suppressing circVPS13C. Propofol functioned through circVPS13C/miR-145/MEK/ERK signaling in ovarian cancer cells. Conclusion Propofol suppressed the proliferation, cell cycle, migration and invasion and induced the apoptosis of ovarian cancer cells through circVPS13C/miR-145/MEK/ERK signaling in vitro.

scholarly journals Long non-coding RNA XIST regulates ovarian cancer progression via modulating miR-335/BCL2L2 axis

2021 ◽  
Vol 19 (1) ◽  
Author(s):  
Qingjuan Meng ◽  
Ningning Wang ◽  
Guanglan Duan
Keyword(s):  
Ovarian Cancer ◽  
Cancer Cells ◽  
Luciferase Reporter ◽  
Migration And Invasion ◽  
Ovarian Cancer Cells ◽  
Human Ovarian Cancer ◽  
Invasion And Migration ◽  
Non Coding Rna ◽  
And Migration ◽  
Long Non Coding Rna

Abstract Background X inactivation-specific transcript (XIST) is the long non-coding RNA (lncRNA) related to cancer, which is involved in the development and progression of various types of tumor. However, up to now, the exact role and molecular mechanism of XIST in the progression of ovarian cancer are not clear. We studied the function of XIST in ovarian cancer cells and clinical tumor specimens. Methods RT-qPCR was performed to detect the expression levels of miR-335 and BCL2L2 in ovarian cancer cells and tissues. MTT and transwell assays were carried out to detect cell proliferation, migration, and invasion abilities. Western blot was performed to analyze the expression level of BCL2L2. The interaction between miR-335 and XIST/BCL2L2 was confirmed using a luciferase reporter assay. Results The inhibition of XIST can inhibit the proliferation invasion and migration of human ovarian cancer cells. In addition, the miR-335/BCL2L2 axis was involved in the functions of XIST in ovarian cancer cells. These results suggested that XIST could regulate tumor proliferation and invasion and migration via modulating miR-335/BCL2L2. Conclusion XIST might be a carcinogenic lncRNA in ovarian cancer by regulating miR-335, and it can serve as a therapeutic target in human ovarian cancer.

scholarly journals LncRNA OIP5-AS1 Affects the Malignant Biological Behavior of Ovarian Cancer via the miR-153-3p/KLF5 Axis

2020 ◽  
Author(s):  
Shenglan Wang ◽  
Chuanchuan Liu ◽  
Yongchuan Li ◽  
Jinwan Qiao ◽  
Xinling Chen ◽  
...  
Keyword(s):  
Ovarian Cancer ◽  
Cancer Cells ◽  
Expression Patterns ◽  
Cell Activity ◽  
Scratch Test ◽  
Prognostic Indicator ◽  
Biological Behavior ◽  
Luciferase Reporter ◽  
Ovarian Cancer Cells ◽  
Klf5 Expression

Abstract Objectives: The purpose of this study was to investigate the expression and clinical significance of LncRNA OIP5-AS1 in ovarian cancer , as well as its effect on malignant biological behavior of ovarian cancer cells. Methods: The expression of OIP5-AS1, miR-153-3p and KLF5 in ovarian cancer (OC) tissues and cells were detected by RT-qPCR. Western Blotting was used to detect KLF5 expression. The expression patterns of OIP5-AS1, U6 and GAPDH in nuclear and cytoplasm fractions were detected using qRT-PCR. Besides, CCK-8 assay, clone formation assay, transwell, scratch test, and flow cytometry were respectively used to detect the cell activity, proliferation, invasiveness, healing of cells, and apoptosis rate of OC cells. Furthermore, The interaction between OIP5-AS1 and miR-153-3p and between miR-153-3p and KLF5 were verified by luciferase reporter assay, and the correlations among these three genes were analyzed.Results: OIP5-AS1 expression was up-regulated in ovarian cancer cell lines and tissues. Si-OIP5-AS1 inhibited cell proliferation, invasion and migration, and induced the apoptosis to a certain extent. Subcellular fraction assay revealed the location of OIP5-AS1 was mainly situated in the cytoplasm. In addition, miR-153-3p was a target of OIP5-AS1, and KLF5 was directly targeted by miR-153-3p. Si-OIP5-AS1 inhibited KLF5 expression, miR-153-3p inhibitor promoted KLF5 expression, and si-KLF5 inhibited OIP5-AS1 expression. Interestingly, expression of OIP5-AS1 and miR-153-3p, and expression of miR-153-3p and KLF5 were negatively correlated, while expression of OIP5-AS1 and KLF5 was positively correlated. In addition, si-KLF5 inhibited the malignant biological behavior of ovarian cancer cells, while miR-153-3p inhibitor had the opposite effect. Most importantly, the addition of si-OIP5-AS1 to mir-153-3p silenced cells could reverse the promotion effect of miR-153-3p inhibitor on the malignant biological behavior of ovarian cancer cells.Conclusions: OIP5-AS1 can be used as an effective prognostic indicator of ovarian cancer, which has the potential to be a new drug target.

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