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Li J, Gao H, Chen B, Li L, Wang Q, Gao Z. lncRNA DARS-AS1 Modulates TSPAN1-Mediated ITGA2 Hypomethylation by Interaction with miR-194-5p Thus Promoting Ovarian Cancer Progression. Stem Cells Int 2022; 2022:4041550. [PMID: 36187230 PMCID: PMC9522497 DOI: 10.1155/2022/4041550] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/27/2022] [Accepted: 09/01/2022] [Indexed: 11/18/2022] Open
Abstract
Objective Ovarian cancer (OC) is usually called the "silent killer" due to its asymptomatic characteristics until advanced stages, thus being a significant threat to female health worldwide. In this work, we characterized an oncogenic DARS-AS1 role in OC. Methods The aggressiveness behaviors of the OC cell model were examined by CCK-8 assay, transwell invasion assay, flow cytometry, and immunoblotting analysis of apoptosis-related proteins. Interactions of miR-194-5p with lncRNA DARS-AS1 or TSPAN1 and of TSPAN1 with ITGA2 were validated by using a luciferase activity assay and chromatin immunoprecipitation (ChIP) assay. Results The OC cell model exhibited overexpressed lncRNA DARS-AS1 compared to normal cells. lncRNA DARS-AS1 knockdown led to reduced OC cell growth and metastasis while inducing the apoptosis in the OC cell model. lncRNA DARS-AS1 positively regulated TSPAN1 expression by binding with miR-194-5p and TSPAN1-mediated ITGA2 hypomethylation in OC cells. Further rescue function studies demonstrated that lncRNA DARS-AS1 affected OC cell viability, migration, invasion, and apoptosis ability by modulating miR-194-5p and TSPAN1 expressions. Conclusion Our work demonstrates that lncRNA DARS-AS1 promotes OC progression by modulating TSPAN1 and ITGA2 hypomethylation by binding with miR-194-5p.
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Affiliation(s)
- Jun Li
- Gynecologic Oncology Department, Xinxiang Central Hospital, China
- Xinxiang Medical University, The Fourth Clinical University, China
| | - Haoyu Gao
- Xinxiang Medical University, School of Basic Medical Sciences, China
| | - Beibei Chen
- Gynecologic Oncology Department, Xinxiang Central Hospital, China
| | - Li Li
- Gynecologic Oncology Department, Xinxiang Central Hospital, China
| | - Qianqing Wang
- Gynecologic Oncology Department, Xinxiang Central Hospital, China
| | - Zhihui Gao
- Gynecologic Oncology Department, Xinxiang Central Hospital, China
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2
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Zhao C, Biondic S, Vandal K, Björklund ÅK, Hagemann-Jensen M, Sommer TM, Canizo J, Clark S, Raymond P, Zenklusen DR, Rivron N, Reik W, Petropoulos S. Single-cell multi-omics of human preimplantation embryos shows susceptibility to glucocorticoids. Genome Res 2022; 32:gr.276665.122. [PMID: 35948369 PMCID: PMC9528977 DOI: 10.1101/gr.276665.122] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 08/04/2022] [Indexed: 11/25/2022]
Abstract
The preconceptual, intrauterine, and early life environments can have a profound and long-lasting impact on the developmental trajectories and health outcomes of the offspring. Given the relatively low success rates of assisted reproductive technologies (ART; ∼25%), additives and adjuvants, such as glucocorticoids, are used to improve the success rate. Considering the dynamic developmental events that occur during this window, these exposures may alter blastocyst formation at a molecular level, and as such, affect not only the viability of the embryo and the ability of the blastocyst to implant, but also the developmental trajectory of the first three cell lineages, ultimately influencing the physiology of the embryo. In this study, we present a comprehensive single-cell transcriptome, methylome, and small RNA atlas in the day 7 human embryo. We show that, despite no change in morphology and developmental features, preimplantation glucocorticoid exposure reprograms the molecular profile of the TE lineage, and these changes are associated with an altered metabolic and inflammatory response. Our data also suggest that glucocorticoids can precociously mature the TE sublineages, supported by the presence of extravillous trophoblast markers in the polar sublineage and presence of X Chromosome dosage compensation. Further, we have elucidated that epigenetic regulation-DNA methylation and microRNAs (miRNAs)-likely underlies the transcriptional changes observed. This study suggests that exposures to exogenous compounds during preimplantation may unintentionally reprogram the human embryo, possibly leading to suboptimal development and longer-term health outcomes.
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Affiliation(s)
- Cheng Zhao
- Department of Clinical Science, Intervention and Technology, Division of Obstetrics and Gynecology, Karolinska Institutet, 14186 Stockholm, Sweden
| | - Savana Biondic
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Axe Immunopathologie, H2X 0A9 Montréal, Canada
- Département de Médecine, Université de Montréal, H3T 1J4 Montréal, Canada
| | - Katherine Vandal
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Axe Immunopathologie, H2X 0A9 Montréal, Canada
- Département de Médecine, Université de Montréal, H3T 1J4 Montréal, Canada
| | - Åsa K Björklund
- Department of Cell and Molecular Biology, National Bioinformatics Infrastructure Sweden, Science for Life Laboratory, Uppsala University, SE-752 37 Uppsala, Sweden
| | | | - Theresa Maria Sommer
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), 1030 Vienna, Austria
| | - Jesica Canizo
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Axe Immunopathologie, H2X 0A9 Montréal, Canada
- Département de Médecine, Université de Montréal, H3T 1J4 Montréal, Canada
| | - Stephen Clark
- Epigenetics Programme, Babraham Institute, Cambridge CB22 3AT, United Kingdom
| | - Pascal Raymond
- Département de Biochimie et Médecine Moléculaire, Université de Montréal, H3T 1J4 Montréal, Canada
| | - Daniel R Zenklusen
- Département de Biochimie et Médecine Moléculaire, Université de Montréal, H3T 1J4 Montréal, Canada
| | - Nicolas Rivron
- Institute of Molecular Biotechnology of the Austrian Academy of Sciences (IMBA), Vienna BioCenter (VBC), 1030 Vienna, Austria
| | - Wolf Reik
- Epigenetics Programme, Babraham Institute, Cambridge CB22 3AT, United Kingdom
- Wellcome Sanger Institute, Cambridge CB10 1RQ, United Kingdom
- Center for Trophoblast Research, University of Cambridge, Cambridge CB2 3EG, United Kingdom
| | - Sophie Petropoulos
- Department of Clinical Science, Intervention and Technology, Division of Obstetrics and Gynecology, Karolinska Institutet, 14186 Stockholm, Sweden
- Centre de Recherche du Centre Hospitalier de l'Université de Montréal, Axe Immunopathologie, H2X 0A9 Montréal, Canada
- Département de Médecine, Université de Montréal, H3T 1J4 Montréal, Canada
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3
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Pellegrini E, Multari G, Gallo FR, Vecchiotti D, Zazzeroni F, Condello M, Meschini S. A natural product, voacamine, sensitizes paclitaxel-resistant human ovarian cancer cells. Toxicol Appl Pharmacol 2022; 434:115816. [PMID: 34856211 DOI: 10.1016/j.taap.2021.115816] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 11/02/2021] [Accepted: 11/26/2021] [Indexed: 11/12/2022]
Abstract
Most women with ovarian cancer are treated with chemotherapy before or after surgery. Unfortunately, chemotherapy treatment can cause negative side effects and the onset of multidrug resistance (MDR). The aim of this study is to evaluate the chemosensitizing effect of a natural compound, voacamine (VOA), in ovarian (A2780 DX) and colon (LoVo DX) cancer drug-resistant cell lines which overexpress P-glycoprotein (P-gp), in combination with paclitaxel (PTX), or doxorubicin (DOX) or 5-fluorouracil (5-FU). VOA, a bisindole alkaloid extracted from Peschiera fuchsiaefolia, has already been shown to be effective in enhancing the effect of doxorubicin, because it interferes with the P-gp function. Ovarian cancer cytotoxicity test shows that single treatments with VOA, DOX and PTX do not modify cell viability, while pretreatment with VOA, and then PTX or DOX for 72 h, induces a decrease. In colon cancer, since 5-FU is not a-substrate for P-gp, VOA has no sensitizing effect while in VOA + DOX there is a decrease in viability. Annexin V/PI test, cell cycle analysis, activation of cleaved PARP1 confirm that VOA plus PTX induce apoptotic cell death. Confocal microscopy observations show the different localization of NF-kB after treatment with VOA + PTX, confirming the inhibition of nuclear translocation induced by VOA pretreatment. Our data show the specific effect of VOA which only works on drugs known to be substrates of P-gp.
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Affiliation(s)
- Evelin Pellegrini
- National Center for Drug Research and Evaluation, National Institute of Health, 00161 Rome, Italy
| | - Giuseppina Multari
- National Center for Drug Research and Evaluation, National Institute of Health, 00161 Rome, Italy
| | - Francesca Romana Gallo
- National Center for Drug Research and Evaluation, National Institute of Health, 00161 Rome, Italy
| | - Davide Vecchiotti
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, 67100 L'Aquila, Italy
| | - Francesca Zazzeroni
- Department of Biotechnological and Applied Clinical Sciences, University of L'Aquila, 67100 L'Aquila, Italy
| | - Maria Condello
- National Center for Drug Research and Evaluation, National Institute of Health, 00161 Rome, Italy..
| | - Stefania Meschini
- National Center for Drug Research and Evaluation, National Institute of Health, 00161 Rome, Italy..
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4
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Wu H, Liang J. Contributions of NFKB1 -94insertion/deletion ATTG polymorphism to the susceptibility of gastrointestinal cancers: A meta-analysis. J Cell Mol Med 2021; 25:10674-10683. [PMID: 34672421 PMCID: PMC8581328 DOI: 10.1111/jcmm.17004] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2021] [Revised: 09/14/2021] [Accepted: 10/07/2021] [Indexed: 12/16/2022] Open
Abstract
Nuclear factor‐kappa B1 (NF‐κB1), a pleiotropic transcription factor, functions as a critical contributor to tumorigenesis. Growing numbers of case‐control studies were carried out to analyse the potential contribution of NF‐κB1 gene variants to gastrointestinal cancer risk, yet remains conflicting conclusions. Therefore, we conducted this most up‐to‐date meta‐analysis to evaluate the relationship between NF‐κB1 gene insertion (I)/deletion (D) polymorphism, namely −94ins/delATTG or rs28362491, and the susceptibility to gastrointestinal cancers. We searched PubMed, EMBASE and MEDLINE databases updated in April 2021 for relevant studies. Meta‐analysis was carried out by software Stata11.0. The quantification of the relationship was determined by computing the combined odds ratios (ORs) and their corresponding 95% confidence intervals (CIs). Sensitivity analysis, the funnel plot and Begg's rank correlation test were also applied. Our findings indicate that −94ins/delATTG polymorphism could not significantly impact the susceptibility to gastrointestinal cancers. Under any five genetic models, −94ins/delATTG polymorphism was not remarkedly linked to the risk of colorectal, gastric and oesophageal cancer, respectively. The significant role of −94ins/delATTG was only observed in some certain subgroups. Findings here suggest that NF‐κB1 gene −94ins/delATTG polymorphism may not predispose to gastrointestinal cancer susceptibility.
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Affiliation(s)
- Hanqiang Wu
- Department of Gastrointestinal Surgery, The First People's Hospital of Zhaoqing, Zhaoqing, China
| | - Jianrong Liang
- Department of Gastrointestinal Surgery, The First People's Hospital of Zhaoqing, Zhaoqing, China
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5
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Midazolam increases cisplatin-sensitivity in non-small cell lung cancer (NSCLC) via the miR-194-5p/HOOK3 axis. Cancer Cell Int 2021; 21:401. [PMID: 34321010 PMCID: PMC8317376 DOI: 10.1186/s12935-021-02104-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 07/19/2021] [Indexed: 12/13/2022] Open
Abstract
Backgrounds As previously reported, midazolam anesthesia exerts tumor-suppressing effects in non-small cell lung cancer (NSCLC), but the regulating effects of this drug on cisplatin-resistance in NSCLC have not been studied. Thus, we designed this study to investigate this issue and preliminarily delineate the potential molecular mechanisms. Methods We performed MTT assay and trypan blue staining assay to measure cell proliferation and viability. Cell apoptosis was examined by FCM. qRT-PCR and immunoblotting were performed to determine the expression levels of genes. The targeting sites between genes were predicted by bioinformatics analysis and were validated by dual-luciferase reporter gene system assay. Mice tumor-bearing models were established and the tumorigenesis was evaluated by measuring tumor weight and volume. Immunohistochemistry (IHC) was used to examine the pro-proliferative Ki67 protein expressions in mice tumor tissues. Results The cisplatin-resistant NSCLC (CR-NSCLC) cells were treated with high-dose cisplatin (50 μg/ml) and low-dose midazolam (10 μg/ml), and the results showed that midazolam suppressed cell proliferation and viability, and promoted cell apoptosis in cisplatin-treated CR-NSCLC cells. In addition, midazolam enhanced cisplatin-sensitivity in CR-NSCLC cell via modulating the miR-194-5p/hook microtubule-tethering protein 3 (HOOK3) axis. Specifically, midazolam upregulated miR-194-5p, but downregulated HOOK3 in the CR-NSCLC cells, and further results validated that miR-194-5p bound to the 3’ untranslated region (3’UTR) of HOOK3 mRNA for its inhibition. Also, midazolam downregulated HOOK3 in CR-NSCLC cells by upregulating miR-194-5p. Functional experiments validated that both miR-194-5p downregulation and HOOK3 upregulation abrogated the promoting effects of midazolam on cisplatin-sensitivity in CR-NSCLC cells. Conclusions Taken together, this study found that midazolam anesthesia reduced cisplatin-resistance in CR-NSCLC cells by regulating the miR-194-5p/HOOK3 axis, implying that midazolam could be used as adjuvant drug for NSCLC treatment in clinical practices. Supplementary Information The online version contains supplementary material available at 10.1186/s12935-021-02104-6.
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6
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Liu B, Lin L, Yu S, Xia R, Zheng L. Long non-coding RNA H19 acts as a microRNA-194 sponge to inhibit the apoptosis and promote the proliferation of hypertrophic scar fibroblasts. Can J Physiol Pharmacol 2021; 99:1288-1297. [PMID: 34310900 DOI: 10.1139/cjpp-2021-0351] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The effects of long non-coding RNAs (lncRNAs) on the proliferation of hypertrophic scars have been described. However, the underlying mechanisms are not well characterized. The present study aimed to investigate the mechanisms of lncRNA H19 in hypertrophic scars. The effects of the lncRNA H19 on the proliferation and apoptosis of hypertrophic scar fibroblasts (HSFs) were analyzed using 5'-Ethynyl-2'-deoxyuridine staining, flow cytometry, and MTT. The results revealed H19 promoted the proliferation and inhibited the apoptosis in HSF. In addition, the binding associations between H19 and microRNA-194 (miR-194), and miR-194 and insulin-like growth factor-I receptor (IGF1R) were identified using bioinformatics screening and verified using dual-luciferase assays. Furthermore, the effects of the IGF1R knockdown on H19-induced HSF phenotypes and regulation over the p38 MAPK pathway were determined. Mechanistically, miR-194 was identified as the downstream effector of the H19-mediated phenotypes of HSFs through its ability to directly target IGF1R, thus modulating the p38 MAPK signaling pathway. In conclusion, the findings suggested that H19 may inhibit the apoptosis and promote the proliferation of HSFs through the miR-194/IGF1R/p38 MAPK signaling axis, thereby contributing to the progression of hypertrophic scars. These findings may provide novel targets for the treatment of hypertrophic scars.
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Affiliation(s)
- Bo Liu
- Medical School of Eastern Liaoning University, Department of Cosmetic Dermatology, Dandong, China;
| | - Lijuan Lin
- Medical School of Eastern Liaoning University, Department of Cosmetic Dermatology, Dandong, China;
| | - Shengjin Yu
- Medical School of Eastern Liaoning University, Department of Cosmetic Dermatology, Dandong, China;
| | - Rongjun Xia
- Medical School of Eastern Liaoning University, Department of Cosmetic Dermatology, Dandong, China;
| | - Linlin Zheng
- Medical School of Eastern Liaoning University, Department of Cosmetic Dermatology, Dandong, China;
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7
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Yoshida K, Yamamoto Y, Ochiya T. miRNA signaling networks in cancer stem cells. Regen Ther 2021; 17:1-7. [PMID: 33598508 PMCID: PMC7848775 DOI: 10.1016/j.reth.2021.01.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Accepted: 01/06/2021] [Indexed: 12/20/2022] Open
Abstract
Cancer stem cells (CSCs) are a small cell subpopulation in many cancer types and are involved in various processes of tumor progression, such as initiation, metastasis and recurrence. The distinguished features of CSCs include a variety of biological properties, including self-renewal, multidifferentiation, stemness marker expression, and resistance to chemotherapy and radiotherapy. Despite their great potential of clinical importance, the CSC signaling pathways are not well understood at the molecular level. MicroRNAs (miRNAs) are a class of endogenous noncoding RNAs that play an important role in the regulation of several cellular, physiological, and developmental processes. Aberrant miRNA expression is associated with many human diseases, including cancer. miRNAs have been implicated in the regulation of CSC properties; therefore, a better understanding of miRNA-induced modulation of CSC gene expression could aid in the identification of promising biomarkers and therapeutic targets. In the present review, we summarize the major findings of the impacts of miRNAs on CSC signaling networks; we then discuss the recent advances that have improved our understanding of CSC regulation by miRNA-mediated signaling networks and that may lead to the development of miRNA therapeutics specifically targeting CSCs.
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Affiliation(s)
- Kosuke Yoshida
- Division of Cellular Signaling, National Cancer Center Research Institute, Tokyo, Japan
- Department of Obstetrics and Gynecology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Yusuke Yamamoto
- Division of Cellular Signaling, National Cancer Center Research Institute, Tokyo, Japan
| | - Takahiro Ochiya
- Department of Molecular and Cellular Medicine, Institute of Medical Science, Tokyo Medical University, Tokyo, Japan
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8
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Huang K, Yang C, Zheng J, Liu X, Liu J, Che D, Xue Y, An P, Wang D, Ruan X, Yu B. Effect of circular RNA, mmu_circ_0000296, on neuronal apoptosis in chronic cerebral ischaemia via the miR-194-5p/Runx3/Sirt1 axis. Cell Death Discov 2021; 7:124. [PMID: 34052838 PMCID: PMC8164632 DOI: 10.1038/s41420-021-00507-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/19/2021] [Accepted: 05/01/2021] [Indexed: 01/22/2023] Open
Abstract
Chronic cerebral ischaemia (CCI) is a common pathological disorder, which is associated with various diseases, such as cerebral arteriosclerosis and vascular dementia, resulting in neurological dysfunction. As a type of non-coding RNA, circular RNA is involved in regulating the occurrence and development of diseases, such as ischaemic brain injury. Here, we found that HT22 cells and hippocampus treated with CCI had low expression of circ_0000296, Runx3, Sirt1, but high expression of miR-194-5p. Overexpression of circ_0000296, Runx3, Sirt1, and silenced miR-194-5p significantly inhibited neuronal apoptosis induced by CCI. This study demonstrated that circ_0000296 specifically bound to miR-194-5p; miR-194-5p bound to the 3'UTR region of Runx3 mRNA; Runx3 directly bound to the promoter region of Sirt1, enhancing its transcriptional activity. Overexpression of circ_0000296 by miR-194-5p reduced the negative regulatory effect of miR-194-5p on Runx3, promoted the transcriptional effect of Runx3 on Sirt1, and inhibited neuronal apoptosis induced by CCI. mmu_circ_0000296 plays an important role in regulating neuronal apoptosis induced by CCI through miR-194-5p/Runx3/Sirt1 pathway.
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Affiliation(s)
- Keyu Huang
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China
| | - Chunqing Yang
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China
| | - Jian Zheng
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China
| | - Xiaobai Liu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China
| | - Jie Liu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China
| | - Dongfang Che
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China
| | - Yixue Xue
- Department of Neurobiology, School of Life Sciences, China Medical University, Shenyang, China.,Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang, China.,Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang, China
| | - Ping An
- Department of Neurobiology, School of Life Sciences, China Medical University, Shenyang, China.,Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang, China.,Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang, China
| | - Di Wang
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China
| | - Xuelei Ruan
- Department of Neurobiology, School of Life Sciences, China Medical University, Shenyang, China.,Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang, China.,Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang, China
| | - Bo Yu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China. .,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China. .,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.
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A novel lncRNA SOX2OT promotes the malignancy of human colorectal cancer by interacting with miR-194-5p/SOX5 axis. Cell Death Dis 2021; 12:499. [PMID: 33993197 PMCID: PMC8124073 DOI: 10.1038/s41419-021-03756-y] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 04/14/2021] [Accepted: 04/16/2021] [Indexed: 11/08/2022]
Abstract
Long noncoding RNAs (lncRNAs) show emerging roles in colorectal cancer (CRC) development and are considered to be involved in the potential mechanism of tumor malignancy. While Sox2 overlapping transcript (SOX2OT) has been implicated in the progression of multiple cancers, its role in CRC remains to be explored. In this study, in situ hybridization (ISH) and qRT-PCR were performed to establish the functional relationships between SOX2OT and CRC deranged in CRC tissue and cells. Subsequently, SOX2OT shRNAs vectors were transfected into CRC cells to performed loss-of-function assays to detect the potential role of SOX2OT on proliferation and metastasis in vitro and vivo. The results showed SOX2OT was an oncogene that was up-regulated in human CRC tissues and cell lines. SOX2OT silencing suppressed cell proliferation, migration, and invasion in CRC cells in vitro, and inhibited tumorigenesis in the mouse xenografts. Bioinformatic predictive analysis coupled with the dual-luciferase reporter, RNA immunoprecipitation (RIP), and functional rescue assay elucidated the mechanistic network of the SOX2OT-miR-194-5p-SOX5 axis in CRC. Mechanistically, SOX2OT acted as a competing endogenous RNA (ceRNA) to upregulate SOX5 by sponging miR-194-5p. Downregulated SOX2OT boosted miR-194-5p expression, thus decreased the protein level of SOX5, which suppresses tumorgenesis of CRC.
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10
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Behera A, Ashraf R, Srivastava AK, Kumar S. Bioinformatics analysis and verification of molecular targets in ovarian cancer stem-like cells. Heliyon 2020; 6:e04820. [PMID: 32984578 PMCID: PMC7492822 DOI: 10.1016/j.heliyon.2020.e04820] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2020] [Revised: 08/01/2020] [Accepted: 08/26/2020] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND Epithelial ovarian cancer (EOC) is a lethal and aggressive gynecological malignancy. Despite recent advances, existing therapies are challenged by a high relapse rate, eventually resulting in disease recurrence and chemoresistance. Emerging evidence indicates that a subpopulation of cells known as cancer stem-like cells (CSLCs) exists with non-tumorigenic cancer cells (non-CSCs) within a bulk tumor and is thought to be responsible for tumor recurrence and drug-resistance. Therefore, identifying the molecular drivers for cancer stem cells (CSCs) is critical for the development of novel therapeutic strategies for the treatment of EOC. METHODS Two gene datasets were downloaded from the Gene Expression Omnibus (GEO) database based on our search criteria. Differentially expressed genes (DEGs) in both datasets were obtained by the GEO2R web tool. Based on log2 (fold change) >2, the top thirteen up-regulated genes and log2 (fold change) < -1.5 top thirteen down-regulated genes were selected, and the association between their expressions and overall survival was analyzed by OncoLnc web tool. Gene Ontology (GO) analysis, Kyoto Encyclopedia of Genes and Genomes (KEGG) and Reactome pathways analysis, and protein-protein interaction (PPI) networks were performed for all the common DEGs found in both datasets. SK-OV-3 cells were cultured in an adherent culture medium and spheroids were generated in suspension culture with CSCs specific medium. RNA from both cell population was extracted to validate the selected DEGs expression by q-PCR. Growth inhibition assay was performed in SK-OV-3 cells after carboplatin treatment. RESULTS A total of 200 DEGs, 117 up-regulated and 83 down-regulated genes were commonly identified in both datasets. Analysis of pathways and enrichment tests indicated that the extracellular matrix part, cell proliferation, tissue development, and molecular function regulation were enriched in CSCs. Biological pathways such as interferon-alpha/beta signaling, molecules associated with elastic fibers, and synthesis of bile acids and bile salts were significantly enriched in CSCs. Among the top 13 up-regulated and down-regulated genes, MMP1 and PPFIBP1 expression were associated with overall survival. Higher expression of ADM, CXCR4, LGR5, and PTGS2 in carboplatin treated SK-OV-3 cells indicate a potential role in drug resistance. CONCLUSIONS The molecular signature and signaling pathways enriched in ovarian CSCs were identified by bioinformatics analysis. This analysis could provide further research ideas to find the new mechanism and novel potential therapeutic targets for ovarian CSCs.
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Affiliation(s)
- Abhijeet Behera
- Division of Biology, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, Andhra Pradesh, India
| | - Rahail Ashraf
- Division of Biology, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, Andhra Pradesh, India
| | - Amit Kumar Srivastava
- Cancer Biology & Inflammatory Disorder Division, CSIR-Indian Institute of Chemical Biology, Kolkata, WB, India
| | - Sanjay Kumar
- Division of Biology, Indian Institute of Science Education and Research (IISER) Tirupati, Tirupati, Andhra Pradesh, India
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11
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Lu S, Yu Z, Xiao Z, Zhang Y. Gene Signatures and Prognostic Values of m 6A Genes in Nasopharyngeal Carcinoma. Front Oncol 2020; 10:875. [PMID: 32596151 PMCID: PMC7300221 DOI: 10.3389/fonc.2020.00875] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2020] [Accepted: 05/04/2020] [Indexed: 12/17/2022] Open
Abstract
Nasopharyngeal carcinoma (NPC) is a malignant tumor with a high rate of local invasion and early distant metastasis. Accumulating studies suggest that N6-methyladenosine methylation (m6A) is closely related to tumorigenesis. However, the relationship between m6A-related genes and prognosis of NPC is poorly understood. Our research aims to discover the prognostic value of m6A RNA methylation genes in NPC. In this study, we analyzed the differentially expressed m6A-related genes between NPC samples and normal control samples and found that two upregulated genes (YTHDF3 and IGF2BP2) and one downregulated gene (METTL3) were overlapped in GSE68799 and GSE53819. Next, we found that high expression of IGF2BP1 and low expression of METTL3 and YTHDF3 in NPC patients showed poor progression-free survival (PFS). Subsequently, the four m6A genes were selected for consensus cluster analysis, and risk models were established. The risk signature, using three genes (GF2BP1 + IGF2BP2 + METTL3), was an independent prognostic factor and predicts the clinicopathological features of NPC. Additionally, the GO, KEGG analysis, and CIBERSORT algorithm revealed that the risk signature was closely associated to immune infiltration in NPC. Finally, the expression and clinical significance of METTL3 were successfully validated in NPC tissues using immunohistochemical techniques. In conclusion, our finding revealed the potential role of m6A modification in NPC, providing novel insight into NPC prognosis and therapeutic strategies.
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Affiliation(s)
- Shanshan Lu
- Research Center of Carcinogenesis and Targeted Therapy, Xiangya Hospital, Central South University, Changsha, China.,The Higher Educational Key Laboratory for Cancer Proteomics and Translational Medicine of Hunan Province, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China
| | - Zhengzheng Yu
- Research Center of Carcinogenesis and Targeted Therapy, Xiangya Hospital, Central South University, Changsha, China.,The Higher Educational Key Laboratory for Cancer Proteomics and Translational Medicine of Hunan Province, Xiangya Hospital, Central South University, Changsha, China
| | - Zhiqiang Xiao
- Research Center of Carcinogenesis and Targeted Therapy, Xiangya Hospital, Central South University, Changsha, China.,The Higher Educational Key Laboratory for Cancer Proteomics and Translational Medicine of Hunan Province, Xiangya Hospital, Central South University, Changsha, China
| | - Yiya Zhang
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, China.,Department of Dermatology, Xiangya Hospital, Central South University, Changsha, China
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