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Morales-Martínez M, Vega MI. Role of MicroRNA-7 (MiR-7) in Cancer Physiopathology. Int J Mol Sci 2022; 23:ijms23169091. [PMID: 36012357 PMCID: PMC9408913 DOI: 10.3390/ijms23169091] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 08/04/2022] [Accepted: 08/09/2022] [Indexed: 11/16/2022] Open
Abstract
miRNAs are non-coding RNA sequences of approximately 22 nucleotides that interact with genes by inhibiting their translation through binding to their 3′ or 5′ UTR regions. Following their discovery, the role they play in the development of various pathologies, particularly cancer, has been studied. In this context, miR-7 is described as an important factor in the development of cancer because of its role as a tumor suppressor, regulating a large number of genes involved in the development and progression of cancer. Recent data support the function of miR-7 as a prognostic biomarker in cancer, and miR-7 has been proposed as a strategy in cancer therapy. In this work, the role of miR-7 in various types of cancer is reviewed, illustrating its regulation, direct targets, and effects, as well as its possible relationship to the clinical outcome of cancer patients.
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Affiliation(s)
- Mario Morales-Martínez
- Molecular Signal Pathway in Cancer Laboratory, UIMEO, Oncology Hospital, Siglo XXI National Medical Center, IMSS, Mexico City 06720, Mexico
| | - Mario I. Vega
- Molecular Signal Pathway in Cancer Laboratory, UIMEO, Oncology Hospital, Siglo XXI National Medical Center, IMSS, Mexico City 06720, Mexico
- Department of Medicine, Hematology-Oncology Division, Greater Los Angeles VA Healthcare Center, UCLA Medical Center, Jonsson Comprehensive Cancer Center, Los Angeles, CA 90095, USA
- Correspondence: or
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Lin Q, Qi Q, Hou S, Chen Z, Jiang N, Zhang L, Lin C. Exosomal circular RNA hsa_circ_007293 promotes proliferation, migration, invasion, and epithelial-mesenchymal transition of papillary thyroid carcinoma cells through regulation of the microRNA-653-5p/paired box 6 axis. Bioengineered 2021; 12:10136-10149. [PMID: 34866540 PMCID: PMC8809932 DOI: 10.1080/21655979.2021.2000745] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2021] [Revised: 10/26/2021] [Accepted: 10/27/2021] [Indexed: 12/15/2022] Open
Abstract
Circular RNAs (circRNAs) or exosomes have been reported to exert key regulatory and/or communication functions in human cancer. Nevertheless, current literature on the effects of exosomal circRNAs on tumor invasion and metastasis in thyroid cancer is incomplete. The role of tumor-derived exosomes in driving in vitro papillary thyroid carcinoma (PTC) progression and metastasis requires further investigation. In our study, Exosomes were harvested from PTC patient serum and PTC cell culture medium. Gene expression analysis in PTC cell lines and exosomes was performed with quantitative reverse-transcription polymerase chain reaction. Transwell, wound healing, Western blot assays, and the cell counting kit-8 were applied for functional analysis. Dual-luciferase reporter assay was used to examine the interaction between hsa_circ_007293 (circ007293), microRNA (miR)-653-5p, and paired box 6 (PAX6). Results showed that circ007293 was enriched in exosomes derived from PTC patient serum and cell culture media. Moreover, circ007293 could enter PTC cells through exosomes, and exosomal circ007293 promoted PTC cell epithelial-mesenchymal transition, invasion, migration, and proliferation. circ007293 knockdown reversed the malignant phenotype of PTC cells in vitro. Additionally, circ007293 could competitively bind with miR-653-5p to regulate PAX6 expression. Notably, miR-653-5p overexpression or PAX6 inhibition suppressed the malignant effects of exosomal circ007293. These results evidenced that exosomal circ007293 induced EMT and augmented the invasive and migratory abilities of PTC cells via the miR-653-5p/PAX6 axis, suggesting that it may serve as a promising biomarker for cancer progression.
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Affiliation(s)
- Qiuyu Lin
- Nuclear Medicine Department, The First Hospital of Jilin University, Changchun, China
| | - Qianle Qi
- Nuclear Medicine Department, The First Hospital of Jilin University, Changchun, China
| | - Sen Hou
- Nuclear Medicine Department, The First Hospital of Jilin University, Changchun, China
| | - Zhen Chen
- Chengdu Xinke Pharmaceutical Co., LTD, Chengdu, China
| | - Nan Jiang
- Nuclear Medicine Department, The First Hospital of Jilin University, Changchun, China
| | - Laney Zhang
- College of Biological Sciences, Cornell University, Ithaca, NY, USA
| | - Chenghe Lin
- Nuclear Medicine Department, The First Hospital of Jilin University, Changchun, China
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Wu F, Ji A, Zhang Z, Li J, Li P. miR-491-5p inhibits the proliferation and migration of A549 cells by FOXP4. Exp Ther Med 2021; 21:622. [PMID: 33936279 PMCID: PMC8082662 DOI: 10.3892/etm.2021.10054] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2018] [Accepted: 03/11/2021] [Indexed: 12/25/2022] Open
Abstract
Aberrant expression of microRNAs (miRNAs/miRs) plays a key role in the development of non-small cell lung cancer (NSCLC). In the present study, lower miRNA (miR)-491-5p levels and a higher forkhead box P4 (FOXP4) mRNA level were observed in NSCLC tissues and cell lines, compared to adjacent tissues and the normal human lung epithelial cell line BEAS-2B, respectively. A549 cell proliferation and migration were inhibited upon transfection of miR-491-5p mimics compared to miR-negative control (NC) mimics. In addition, compared to miR-NC mimics, overexpression of miR-491-5p decreased FOXP4 expression, while downregulation of miR-491-5p increased FOXP4 expression in A549 cells. The dual luciferase assay confirmed that the 3'untranslated region of FOXP4 was a target for miR-491-5p in A549 cells. Moreover, compared with the control short hairpin (sh)RNA, there was lower expression levels of TGF-β and its downstream targets (MMP-2 and MMP-9) in the FOXP4 shRNA group. Similarly, compared to miR-NC mimics, overexpression of miR-491-5p decreased MMP-2 and MMP-9 expression levels. In FOXP4-knockdown A549 cells, overexpression of miR-491-5p showed little effect on cell proliferation/migration. In A549 cells, overexpression of FOXP4 partially reversed the miR-491-5p mimics-induced inhibition on the cell proliferation and migration. These results may provide new insights into the role of miR-491-5p in NSCLC.
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Affiliation(s)
- Fuyong Wu
- Third Department of Oncology, People's Hospital of Shouguang, Shouguang, Shandong 262700, P.R. China
| | - Aiping Ji
- Second Department of Oncology, People's Hospital of Shouguang, Shouguang, Shandong 262700, P.R. China
| | - Zhenkun Zhang
- Third Department of Oncology, People's Hospital of Shouguang, Shouguang, Shandong 262700, P.R. China
| | - Jinfang Li
- Third Department of Oncology, People's Hospital of Shouguang, Shouguang, Shandong 262700, P.R. China
| | - Penglong Li
- Department of Oncology, Yantai Laiyang Central Hospital, Laiyang, Shandong 265200, P.R. China
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MiR-7 in Cancer Development. Biomedicines 2021; 9:biomedicines9030325. [PMID: 33806891 PMCID: PMC8004586 DOI: 10.3390/biomedicines9030325] [Citation(s) in RCA: 29] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 03/20/2021] [Accepted: 03/22/2021] [Indexed: 12/17/2022] Open
Abstract
MicroRNAs (miRNAs) are short non-coding RNA involved in the regulation of specific mRNA translation. They participate in cellular signaling circuits and can act as oncogenes in tumor development, so-called oncomirs, as well as tumor suppressors. miR-7 is an ancient miRNA involved in the fine-tuning of several signaling pathways, acting mainly as tumor suppressor. Through downregulation of PI3K and MAPK pathways, its dominant role is the suppression of proliferation and survival, stimulation of apoptosis and inhibition of migration. Besides these functions, it has numerous additional roles in the differentiation process of different cell types, protection from stress and chromatin remodulation. One of the most investigated tissues is the brain, where its downregulation is linked with glioblastoma cell proliferation. Its deregulation is found also in other tumor types, such as in liver, lung and pancreas. In some types of lung and oral carcinoma, it can act as oncomir. miR-7 roles in cell fate determination and maintenance of cell homeostasis are still to be discovered, as well as the possibilities of its use as a specific biotherapeutic.
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Tong F, Guo J, Miao Z, Li Z. LncRNA SNHG17 promotes the progression of oral squamous cell carcinoma by modulating miR-375/PAX6 axis. Cancer Biomark 2021; 30:1-12. [PMID: 32924983 DOI: 10.3233/cbm-191070] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND The prognosis of patients with recurrent and/or metastatic oral squamous cell carcinoma (OSCC) remains poor, and its incidence is especially high in developing countries. Multiple long non-coding RNAs (lncRNAs) are recently identified as crucial oncogenic factors or tumor suppressors. This study aimed to probe into the role of lncRNA small nucleolar RNA host gene 17 (SNHG17) on the progression of OSCC. METHODS The expression level of SNHG17 in OSCC samples was tested using quantitative real-time polymerase chain reaction (qRT-PCR). Human OSCC cell lines CAL-27 and Tca8113 were used in in vitro studies. Cell counting kit-8 (CCK-8) and BrdU assays were used to assess the effect of SNHG17 on OSCC cell proliferation. Flow cytometry was used to study the effect of SNHG17 on OSCC cell apoptosis. Transwell assay was conducted to detect the effect of SNHG17 on migration and invasion. Moreover, luciferase reporter assay was employed to confirm targeting relationship between miR-375 and SNHG17. Additionally, Western blot was used to observe the regulatory function of SNHG17 on PAX6. RESULTS SNHG17 expression in OSCC clinical samples was significantly increased and was correlated with unfavorable pathological indexes. Its overexpression remarkably accelerated proliferation and metastasis of OSCC cells, while reduced apoptosis. Accordingly, knockdown of SNHG17 suppressed the malignant phenotypes of OSCC cells. Overexpression of SNHG17 significantly reduced the expression of miR-375 by sponging it, but enhanced the expression of PAX6. CONCLUSION SNHG17 is a sponge of tumor suppressor miR-375 in OSCC, enhances the expression of PAX6 indirectly, and functions as an oncogenic lncRNA.
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Affiliation(s)
- Fei Tong
- Department of Orthodontics, Affiliated Stomatological Hospital of Nanchang University, The Key Laboratory of Oral Biomedicine, Nanchang, Jiangxi, China
| | - Jun Guo
- Department of Endodontics, Affiliated Stomatological Hospital of Nanchang University, The Key Laboratory of Oral Biomedicine, Nanchang, Jiangxi, China
| | - Zhanqi Miao
- Department of Orthodontics, Shenzhen Baoan Shajing People's Hospital, Guangzhou Medical University, Shenzhen, Guangdong, China
| | - Zhihua Li
- Department of Orthodontics, Affiliated Stomatological Hospital of Nanchang University, The Key Laboratory of Oral Biomedicine, Nanchang, Jiangxi, China
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Xu L, Liao WL, Lu QJ, Zhang P, Zhu J, Jiang GN. Hypoxic tumor-derived exosomal circular RNA SETDB1 promotes invasive growth and EMT via the miR-7/Sp1 axis in lung adenocarcinoma. MOLECULAR THERAPY-NUCLEIC ACIDS 2021; 23:1078-1092. [PMID: 33614250 PMCID: PMC7875767 DOI: 10.1016/j.omtn.2021.01.019] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Accepted: 01/17/2021] [Indexed: 02/07/2023]
Abstract
Hypoxia is a common feature of solid tumors and has been associated with tumor aggressiveness and poor prognosis. Exosomes are involved in mediating cellular-environment interactions. Circular RNAs (circRNAs) are a class of non-coding RNA broadly found in cells and exosomes. However, the functions and regulatory mechanisms of exosomal circRNAs induced by hypoxia remain poorly understood in lung adenocarcinoma (LUAD) development. Differentially expressed circRNAs were identified between exosomes extracted from hypoxic and normoxic conditions through microarray analysis. We focused on hsa-circ-0003439 found on chromosome 1 and derived from SET domain bifurcated histone lysine methyltransferase 1 (SETDB1), and thus we named it circSETDB1. We discovered that exosomes obtained from hypoxic LUAD cells improved the migration, invasion, and proliferation capacity of normoxic LUAD cells. circSETDB1 was found to be significantly upregulated in hypoxia-induced exosomes from LUAD cell lines compared with exosomes in the normal condition. Moreover, knockdown of circSETDB1 significantly inhibited cell malignant growth in vitro. Importantly, we showed that circSETDB1 was upregulated in serum exosomes in LUAD patients, and exosomal circSETDB1 levels were closely associated with disease stage. Finally, using RNA immunoprecipitation (RIP), bioinformatics, and luciferase reporter assays, we elucidated the implication of a circSETDB1/miR-7/specificity protein 1 (Sp1) axis in the development and epithelial-mesenchymal transition (EMT) of lung adenocarcinoma.
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Affiliation(s)
- Li Xu
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China.,Department of General Thoracic Surgery, Department for BioMedical Research (DBMR), Inselspital, Bern University Hospital, University of Bern, Bern, Switzerland
| | - Wei-Lin Liao
- Department of Thoracic Surgery, General Hospital of Western Theater Command, Chengdu, China
| | - Qi-Jue Lu
- Department of Thoracic Surgery, Changhai Hospital, The Second Military Medical University, Shanghai 200433, China
| | - Peng Zhang
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China
| | - Ji Zhu
- Department of Thoracic Surgery, Changhai Hospital, The Second Military Medical University, Shanghai 200433, China
| | - Ge-Ning Jiang
- Department of Thoracic Surgery, Shanghai Pulmonary Hospital, Tongji University School of Medicine, Shanghai 200433, China
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Jin HF, Wang JF, Shao M, Zhou K, Ma X, Lv XP. Down-Regulation of miR-7 in Gastric Cancer Is Associated With Elevated LDH-A Expression and Chemoresistance to Cisplatin. Front Cell Dev Biol 2020; 8:555937. [PMID: 33072745 PMCID: PMC7536350 DOI: 10.3389/fcell.2020.555937] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2020] [Accepted: 08/14/2020] [Indexed: 01/03/2023] Open
Abstract
MicroRNAs (miRNAs) are dysregulated in the context of many cancer types, making them potentially ideal diagnostic or therapeutic targets in patients in which they are aberrantly expressed. In the present study, we found miR-7 to be downregulated in gastric cancer (GC), and we further determined its expression to be closely linked to GC sensitivity to the chemotherapeutic compound cisplatin. This effect appears to be at least partially attributable to the regulation of LDH-A, which is a miR-7 target gene and expression of LDH-A is negatively correlated with miR-7 expression in primary GC tumor samples. When upregulated, we also determined that miR-7 was able to inhibit the proliferation, colony formation, and glycolysis of GC cells owing to its regulation of LDH-A. Moreover, overexpression of miR-7 render cells more sensitive to cisplatin. Our results thus provide novel evidence that miR-7 is a key mediator of GC growth and chemosensitivity through its regulation of LDH-A, thus potentially highlighting this pathway as a therapeutic target for treating affected patients.
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Affiliation(s)
- Hui-Fang Jin
- Department of Bloood Transfusion, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Ju-Feng Wang
- Department of Oncology, Henan Cancer Hospital, The Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, China
| | - Ming Shao
- Department of Bloood Transfusion, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Kailu Zhou
- Medical College of Zhengzhou University, Zhengzhou, China
| | - Xiao Ma
- Department of Ultrasound, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Xian-Ping Lv
- Department of Bloood Transfusion, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
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Xu G, Yang H, Liu M, Niu J, Chen W, Tan X, Sun L. lncRNA TINCR facilities bladder cancer progression via regulating miR‑7 and mTOR. Mol Med Rep 2020; 22:4243-4253. [PMID: 33000269 PMCID: PMC7533511 DOI: 10.3892/mmr.2020.11530] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Accepted: 03/26/2020] [Indexed: 12/25/2022] Open
Abstract
Long non-coding RNAs (lncRNAs) have been implicated in various human malignancies, but the molecular mechanism of lncRNA TINCR ubiquitin domain containing (TINCR) in bladder cancer remains unclear. The present study found that the expression of TINCR was significantly increased in bladder cancer tissues and cell lines, when compared with that in adjacent normal tissues and normal urinary tract epithelial cell line SV-HUC-1, respectively. Moreover, the high expression of TINCR was associated with tumor metastasis and advanced tumor, node, metastasis stage, as well as reduced overall survival rates of patients with bladder cancer. Further investigation revealed that microRNA (miR)-7 was negatively mediated by TINCR in bladder cancer cells. Silencing of TINCR expression significantly increased miR-7 expression and reduced bladder cancer cell proliferation, migration and invasion, while knockdown of miR-7 expression reversed the inhibitory effects of TINCR downregulation on bladder cancer cells. mTOR was then identified as a target gene of miR-7 in bladder cancer, and it was demonstrated that overexpression of mTOR reversed the inhibitory effects of miR-7 on bladder cancer cells. In conclusion, this study suggests that TINCR/miR-7/mTOR signaling may be a potential therapeutic target for bladder cancer.
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Affiliation(s)
- Guoying Xu
- Department of Urology Surgery, Shengli Hospital of Shengli Petroleum Administration, Dongying, Shandong 257055, P.R. China
| | - Honglan Yang
- Department of Oncology, Dongying People's Hospital, Dongying, Shandong 257091, P.R. China
| | - Meichun Liu
- Clinical Laboratory, Shengli Hospital of Shengli Petroleum Administration, Dongying, Shandong 257055, P.R. China
| | - Jintao Niu
- Department of Urology Surgery, Shengli Hospital of Shengli Petroleum Administration, Dongying, Shandong 257055, P.R. China
| | - Weidong Chen
- Shengli Hospital of Shengli Petroleum Administration, Dongying, Shandong 257055, P.R. China
| | - Xiaojing Tan
- Department of Oncology, Dongying People's Hospital, Dongying, Shandong 257091, P.R. China
| | - Li Sun
- Shengli Hospital of Shengli Petroleum Administration, Dongying, Shandong 257055, P.R. China
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Jin M, Gao D, Wang R, Sik A, Liu K. Possible involvement of TGF‑β‑SMAD‑mediated epithelial‑mesenchymal transition in pro‑metastatic property of PAX6. Oncol Rep 2020; 44:555-564. [PMID: 32627030 PMCID: PMC7336511 DOI: 10.3892/or.2020.7644] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 05/12/2020] [Indexed: 01/15/2023] Open
Abstract
Paired box 6 (PAX6) is a transcription factor that has oncogenic features. In breast cancer, PAX6 facilitates tumor progression; however, the underlying mechanism is largely unknown. The majority of breast cancer-related mortalities are associated with metastasis of cancer cells. Therefore, the present study aimed to investigate the role of PAX6 in breast tumor metastasis. PAX6 was stably overexpressed in breast cancer cells to perform tumor migration and metastasis assays in vitro and in vivo. In addition, the expression of PAX6 and transforming growth factor β (TGF-β)-SMAD signaling associated proteins on human breast cancer tissue array, as well as key factors involved in epithelial-mesenchymal transition (EMT) were assayed to explore the mechanism underlying metastasis of breast cancer cells. The expression levels of PAX6 were demonstrated to be increased in human breast cancer tissues and associated with poor clinical outcomes. Overexpression of PAX6 markedly promoted metastasis. Further investigation revealed that PAX6 overexpression increased TGF-β-SMAD signaling pathway and induced EMT. These results suggested that highly expressed PAX6 led to EMT through TGF-β-SMAD signaling pathway, thereby promoting cell metastasis and ultimately affecting survival in patients with breast cancer. Taken together, findings indicated that PAX6 may serve as a therapeutic target for the clinical treatment of breast cancer and the underlying mechanism could be used to overcome metastasis of cancer cells.
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Affiliation(s)
- Meng Jin
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250103, P.R. China
| | - Daili Gao
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250103, P.R. China
| | - Rongchun Wang
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250103, P.R. China
| | - Attila Sik
- Institute of Physiology, Medical School, University of Pécs, H‑7624 Pécs, Hungary
| | - Kechun Liu
- Biology Institute, Qilu University of Technology (Shandong Academy of Sciences), Jinan, Shandong 250103, P.R. China
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Liu L, Yang X, Li NF, Lin L, Luo H. Circ_0015756 promotes proliferation, invasion and migration by microRNA-7-dependent inhibition of FAK in hepatocellular carcinoma. Cell Cycle 2019; 18:2939-2953. [PMID: 31522588 DOI: 10.1080/15384101.2019.1664223] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Background: Hepatocellular carcinoma (HCC) afflicts more than half a million people each year worldwide. It was reported that circ_0015756 was up-regulated in HCC, but the mechanism did not extensively studied. Methods: we collected 24 paired cancerous and noncancerous liver tissues surgically resected from HCC patients. HCC cell proliferation, invasion, migration and apoptosis in vitro were evaluated using MTT assay, Transwell assay, scratch test and Annexin-V/PI staining respectively. Interactions between circ_0015756 and miR-7, miR-7 and FAK were further validated by the luciferase reporter assay. Tumor xenografts of HCC cells with circ_0015756 knockdown were established in nude mice. Results: The expression level of circ_0015756 was increased and the expression level of miR-7 was diminished in cancerous liver tissues relative to noncancerous liver tissues. Circ_0015756 knockdown was shown to increase the expression of miR-7, reduce the proliferation, invasion, migration and resistance to apoptosis, and down-regulate the expression of FAK in HCC. We found miR-7 impaired expression of FAK to inhibit HCC cells, suggesting that miR-7 is responsible for the dysfunction of FAK. Importantly, we showed circ_0015756 could up-regulate FAK via targeting miR-7. These in vitro findings were reproduced in vivo that circ_0015756 knockdown decreased HCC xenograft growth. Conclusion: Our present study reveals a model of HCC development that is composed of circ_0015756, miR-7 and FAK. Modulation of their levels exhibits a promise in the treatment of HCC. Abbreviations: HCC: hepatocellular carcinoma; circRNAs: circular RNAs; miRNA/miR: microRNA; miR-7: microRNA-7; FAK: focal adhesion kinase; KLF-4: kruppel like factor 4; DKK1: dickkopf WNT signaling pathway inhibitor 1; ccRCC: clear cell renal cell carcinoma; PI3K: phosphoinositide 3-kinase; Ct: comparative threshold cycle; RPMI: Roswell Park Memorial Institute; FBS: fetal bovine serum; RT: reverse transcription; qPCR: quantitative polymerase chain reaction; RIPA: radioimmunoprecipitation assay; SDS-PAGE: sodium dodecyl sulfate-polyacrylamide gel electrophoresis; PVDF: polyvinylidene difluoride; GAPDH: glyceraldehyde-3-phosphate dehydrogenase; MTT: 3-(4,5-Dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide; DMSO: dimethyl sulfoxide; DMEM: Dulbecco's modified Eagle's medium; PI: propidium iodide; SPF: specific pathogen-free; SD: standard deviation; p-Akt: phosphorylated-Akt; shRNAs: small hairpin RNAs; 3'UTR: 3'-untranslated regions.
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Affiliation(s)
- Ling Liu
- Department of General Surgery, Xiangya Hospital, Central South University , Changsha , P.R.China
| | - Xin Yang
- Department of General Surgery, The Second Xiangya Hospital, Central South University , Changsha , P.R.China
| | - Nian-Feng Li
- Department of General Surgery, Xiangya Hospital, Central South University , Changsha , P.R.China
| | - Ling Lin
- Department of General Surgery, Xiangya Hospital, Central South University , Changsha , P.R.China
| | - Hui Luo
- Department of General Surgery, Xiangya Hospital, Central South University , Changsha , P.R.China
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The PAX6-ZEB2 axis promotes metastasis and cisplatin resistance in non-small cell lung cancer through PI3K/AKT signaling. Cell Death Dis 2019; 10:349. [PMID: 31024010 PMCID: PMC6483988 DOI: 10.1038/s41419-019-1591-4] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2018] [Revised: 04/08/2019] [Accepted: 04/15/2019] [Indexed: 02/05/2023]
Abstract
Paired-box 6 (PAX6) is an important transcription factor required for the function of human neuroectodermal epithelial tissues. Previous studies have suggested that it is also expressed in several types of tumors and has an oncogenic role. However, little is known about its role in non-small cell lung cancer (NSCLC). Here, we found that PAX6 expression levels were upregulated in human lung cancer tissues and correlated with poor clinical outcomes. PAX6 overexpression significantly promoted NSCLC epithelial-to-mesenchymal transition (EMT) and metastasis, whereas its knockdown inhibited these processes. PAX6 is commonly correlated with EMT-mediated stem cell transformation, thereby inducing cisplatin resistance. Using the RT2 Profiler PCR Array, we found that WNT5A, EGFR, and ZEB2 were differentially regulated in response to PAX6 modulation. In addition, PAX6 directly bound to the promoter region of ZEB2. ZEB2 knockdown significantly reduced the expression and function of PAX6. ZEB2 was upregulated upon PAX6 overexpression and downregulated upon PAX6 knockdown, whereas E-cadherin expression negatively correlated with PAX6 levels. Moreover, p-PI3K and p-AKT were significantly enhanced by PAX6, which was reversed by the addition of the PI3K-AKT inhibitor, LY294002. These data suggest that PAX6 can mediate E-cadherin downregulation through the PI3K/AKT signaling pathway by directly binding the promoter region of ZEB2, thereby mediating cell migration, stem cell transformation, and cisplatin resistance; and ultimately, affecting survival in NSCLC patients.
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Qian Z, Zhang Q, Hu Y, Zhang T, Li J, Liu Z, Zheng H, Gao Y, Jia W, Hu A, Li B, Hao J. Investigating the mechanism by which SMAD3 induces PAX6 transcription to promote the development of non-small cell lung cancer. Respir Res 2018; 19:262. [PMID: 30594196 PMCID: PMC6311080 DOI: 10.1186/s12931-018-0948-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Accepted: 11/22/2018] [Indexed: 01/08/2023] Open
Abstract
Background This study investigated the function of SMAD3 (SMAD family member 3) in regulating PAX6 (paired box 6) in non-small cell lung cancer. Methods First, qRT-PCR was employed to detect SMAD3 expression in cancer tissues along with normal tissues and four cell lines, including BEAS-2B, H125, HCC827 and A549 cells. SMAD3 was knocked down by small interference RNA (siRNA), and then its expression was determined via qRT-PCR and Western blot analysis. The correlation between SMAD3 and PAX6 was determined by double luciferase reporter experiments and chromatin immunoprecipitation (ChIP) assay. Cell viability was evaluated by CCK-8 and colony forming assays, while cell migration and invasion were detected by Transwell analysis. Results SMAD3 and PAX6 were upregulated in lung cancer tissues and cancer cells. Knocking down SMAD3 and PAX6 by transfection with siRNAs specifically suppressed the expression of SMAD3 and PAX6 mRNA and protein levels. SMAD3 could promote PAX6 transcriptional activity by binding to its promoter. Reduced expression of SMAD3 led to the downregulation of PAX6 mRNA and protein levels along with decreased cell migration, invasion, proliferation and viability in A549 and HCC827 cells. PAX6 overexpression altered the si-SMAD3-induced inhibition of cell migration, invasion, proliferation and viability in A549 and HCC827 cells. Additionally, PAX6 knockdown alone also repressed the cell migration, invasion, proliferation and viability of the cell lines. Conclusions SMAD3 promotes the progression of non-small cell lung cancer by upregulating PAX6 expression. Electronic supplementary material The online version of this article (10.1186/s12931-018-0948-z) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Zhe Qian
- Department of General Medicine, Beijing Chest Hospital, Capital Medical University & Beijing Tuberculosis and Thoracic Tumor Research Institute, No.9 Yard, Beiguan Street, Tongzhou District, Beijing, 101149, China
| | - Qiankun Zhang
- Department of Medical Oncology, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Shushan District, Hefei, 230022, Anhui, China
| | - Ying Hu
- Department of General Medicine, Beijing Chest Hospital, Capital Medical University & Beijing Tuberculosis and Thoracic Tumor Research Institute, No.9 Yard, Beiguan Street, Tongzhou District, Beijing, 101149, China
| | - Tongmei Zhang
- Department of General Medicine, Beijing Chest Hospital, Capital Medical University & Beijing Tuberculosis and Thoracic Tumor Research Institute, No.9 Yard, Beiguan Street, Tongzhou District, Beijing, 101149, China
| | - Jie Li
- Department of General Medicine, Beijing Chest Hospital, Capital Medical University & Beijing Tuberculosis and Thoracic Tumor Research Institute, No.9 Yard, Beiguan Street, Tongzhou District, Beijing, 101149, China
| | - Zan Liu
- Department of General Medicine, Beijing Chest Hospital, Capital Medical University & Beijing Tuberculosis and Thoracic Tumor Research Institute, No.9 Yard, Beiguan Street, Tongzhou District, Beijing, 101149, China
| | - Hua Zheng
- Department of General Medicine, Beijing Chest Hospital, Capital Medical University & Beijing Tuberculosis and Thoracic Tumor Research Institute, No.9 Yard, Beiguan Street, Tongzhou District, Beijing, 101149, China
| | - Yuan Gao
- Department of General Medicine, Beijing Chest Hospital, Capital Medical University & Beijing Tuberculosis and Thoracic Tumor Research Institute, No.9 Yard, Beiguan Street, Tongzhou District, Beijing, 101149, China
| | - Wenyun Jia
- Department of General Medicine, Beijing Chest Hospital, Capital Medical University & Beijing Tuberculosis and Thoracic Tumor Research Institute, No.9 Yard, Beiguan Street, Tongzhou District, Beijing, 101149, China
| | - Aimin Hu
- Department of General Medicine, Beijing Chest Hospital, Capital Medical University & Beijing Tuberculosis and Thoracic Tumor Research Institute, No.9 Yard, Beiguan Street, Tongzhou District, Beijing, 101149, China
| | - Baolan Li
- Department of General Medicine, Beijing Chest Hospital, Capital Medical University & Beijing Tuberculosis and Thoracic Tumor Research Institute, No.9 Yard, Beiguan Street, Tongzhou District, Beijing, 101149, China.
| | - Jiqing Hao
- Department of Medical Oncology, The First Affiliated Hospital of Anhui Medical University, No. 218 Jixi Road, Shushan District, Hefei, 230022, Anhui, China.
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13
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Zhang L, Mubarak T, Chen Y, Lee T, Pollock A, Sun T. Counter-Balance Between Gli3 and miR-7 Is Required for Proper Morphogenesis and Size Control of the Mouse Brain. Front Cell Neurosci 2018; 12:259. [PMID: 30210296 PMCID: PMC6121149 DOI: 10.3389/fncel.2018.00259] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2018] [Accepted: 07/30/2018] [Indexed: 12/25/2022] Open
Abstract
Brain morphogenesis requires precise regulation of multiple genes to control specification of distinct neural progenitors (NPs) and neuronal production. Dysregulation of these genes results in severe brain malformation such as macrocephaly and microcephaly. Despite studies of the effect of individual pathogenic genes, the counter-balance between multiple factors in controlling brain size remains unclear. Here we show that cortical deletion of Gli3 results in enlarged brain and folding structures in the cortical midline at the postnatal stage, which is mainly caused by the increased percentage of intermediate progenitors (IPs) and newborn neurons. In addition, dysregulation of neuronal migration also contributes to the folding defects in the cortical midline region. Knockdown of microRNA (miRNA) miR-7 can rescue abnormal brain morphology in Gli3 knockout mice by recovering progenitor specification, neuronal production and migration through a counter-balance of the Gli3 activity. Moreover, miR-7 likely exerts its function through silencing target gene Pax6. Our results indicate that proper brain morphogenesis is an outcome of interactive regulations of multiple molecules such as Gli3 and miR-7. Because miRNAs are easy to synthesize and deliver, miR-7 could be a potential therapeutic means to macrocephaly caused by Gli3-deficiency.
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Affiliation(s)
- Longbin Zhang
- Center for Precision Medicine, School of Medicine and School of Biomedical Sciences, Huaqiao University, Xiamen, China
| | - Taufif Mubarak
- Department of Cell and Developmental Biology, Weill Cornell Medicine, Cornell University, New York, NY, United States
| | - Yase Chen
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China
| | - Trevor Lee
- Department of Cell and Developmental Biology, Weill Cornell Medicine, Cornell University, New York, NY, United States
| | - Andrew Pollock
- Department of Cell and Developmental Biology, Weill Cornell Medicine, Cornell University, New York, NY, United States
| | - Tao Sun
- Center for Precision Medicine, School of Medicine and School of Biomedical Sciences, Huaqiao University, Xiamen, China
- Department of Cell and Developmental Biology, Weill Cornell Medicine, Cornell University, New York, NY, United States
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14
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Chen C, Yue D, Lei L, Wang H, Lu J, Zhou Y, Liu S, Ding T, Guo M, Xu L. Promoter-Operating Targeted Expression of Gene Therapy in Cancer: Current Stage and Prospect. MOLECULAR THERAPY. NUCLEIC ACIDS 2018; 11:508-514. [PMID: 29858085 PMCID: PMC5992480 DOI: 10.1016/j.omtn.2018.04.003] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/26/2017] [Revised: 03/24/2018] [Accepted: 04/09/2018] [Indexed: 02/07/2023]
Abstract
The technique of targeted expression of interesting genes, including distinct delivery systems and specific gene promoter-operating expression, is an important strategy for gene therapy against cancers. Up to now, extensive literature documented the efficacy of distinct delivery systems, such as the liposome system, nano-particle system, polyetherimide (PEI) system, and so on, in cancer gene therapy. However, a related document on the potential value of using a specific gene promoter, such as a tumor suppressor, in cancer gene therapy was still scary. The main obstacle might be that the selection of an ideal gene promoter to operate interesting gene expression in cancer gene therapy is still not fully understood. Therefore, many efforts need to be done in order to make it a real power tool for the human clinical treatment of cancer patients. The purpose of this review is to clarify the current state and some problematics in development of promoter-operating targeted expression of interesting genes and highlight its potential in cancer gene therapy.
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Affiliation(s)
- Chao Chen
- Special Key Laboratory of Gene Detection and Therapy of Guizhou Province, Guizhou 563000, China; Department of Immunology, Zunyi Medical University, Guizhou 563000, China
| | - Dongxu Yue
- Special Key Laboratory of Gene Detection and Therapy of Guizhou Province, Guizhou 563000, China; Department of Immunology, Zunyi Medical University, Guizhou 563000, China
| | - Liangyu Lei
- Special Key Laboratory of Gene Detection and Therapy of Guizhou Province, Guizhou 563000, China; Department of Immunology, Zunyi Medical University, Guizhou 563000, China
| | - Hairong Wang
- Special Key Laboratory of Gene Detection and Therapy of Guizhou Province, Guizhou 563000, China; Department of Immunology, Zunyi Medical University, Guizhou 563000, China
| | - Jia Lu
- Special Key Laboratory of Gene Detection and Therapy of Guizhou Province, Guizhou 563000, China; Department of Immunology, Zunyi Medical University, Guizhou 563000, China
| | - Ya Zhou
- Department of Medical Physics, Zunyi Medical University, Guizhou 563000, China
| | - Shiming Liu
- Special Key Laboratory of Gene Detection and Therapy of Guizhou Province, Guizhou 563000, China; Department of Immunology, Zunyi Medical University, Guizhou 563000, China
| | - Tao Ding
- Special Key Laboratory of Gene Detection and Therapy of Guizhou Province, Guizhou 563000, China; Department of Immunology, Zunyi Medical University, Guizhou 563000, China
| | - Mengmeng Guo
- Special Key Laboratory of Gene Detection and Therapy of Guizhou Province, Guizhou 563000, China; Department of Immunology, Zunyi Medical University, Guizhou 563000, China
| | - Lin Xu
- Special Key Laboratory of Gene Detection and Therapy of Guizhou Province, Guizhou 563000, China; Department of Immunology, Zunyi Medical University, Guizhou 563000, China.
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15
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Kiselev Y, Andersen S, Johannessen C, Fjukstad B, Standahl Olsen K, Stenvold H, Al-Saad S, Donnem T, Richardsen E, Bremnes RM, Rasmussen Busund LT. Transcription factor PAX6 as a novel prognostic factor and putative tumour suppressor in non-small cell lung cancer. Sci Rep 2018; 8:5059. [PMID: 29568088 PMCID: PMC5864921 DOI: 10.1038/s41598-018-23417-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2017] [Accepted: 03/09/2018] [Indexed: 12/21/2022] Open
Abstract
Lung cancer is the leading cause of cancer deaths. Novel predictive biomarkers are needed to improve treatment selection and more accurate prognostication. PAX6 is a transcription factor with a proposed tumour suppressor function. Immunohistochemical staining was performed on tissue microarrays from 335 non-small cell lung cancer (NSCLC) patients for PAX6. Multivariate analyses of clinico-pathological variables and disease-specific survival (DSS) was carried out, and phenotypic changes of two NSCLC cell lines with knockdown of PAX6 were characterized. While PAX6 expression was only associated with a trend of better disease-specific survival (DSS) (p = 0.10), the pN+ subgroup (N = 103) showed significant correlation between high PAX6 expression and longer DSS (p = 0.022). Median survival for pN + patients with high PAX6 expression was 127.4 months, versus 22.9 months for patients with low PAX6 expression. In NCI-H661 cells, knockdown of PAX6 strongly activated serum-stimulated migration. In NCI-H460 cells, PAX6 knockdown activated anchorage-independent growth. We did not observe any significant effect of PAX6 on proliferation in either of cell lines. Our findings strongly support the proposition of PAX6 as a valid and positive prognostic marker in NSCLC in node-positive patients. There is a need for further studies, which should provide mechanistical explanation for the role of PAX6 in NSCLC.
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Affiliation(s)
- Yury Kiselev
- Department of Life Sciences and Health, Faculty of Health Sciences, OsloMet - Oslo Metropolitan University, Oslo, Norway. .,Department of Pharmacy, UiT The Arctic University of Norway, Tromso, Norway. .,Department of Medical Biology, UiT The Arctic University of Norway, Tromso, Norway.
| | - Sigve Andersen
- Department of Clinical Medicine, UiT The Arctic University of Norway, Tromso, Norway.,Department of Oncology, University Hospital of North Norway, Tromso, Norway
| | - Charles Johannessen
- Department of Medical Biology, UiT The Arctic University of Norway, Tromso, Norway
| | - Bjørn Fjukstad
- Department of Computer Science, Faculty of Science and Technology, UiT The Arctic University of Norway, Tromso, Norway
| | - Karina Standahl Olsen
- Department of Community Medicine, Faculty of Health Sciences, UiT The Arctic University of Norway, Tromso, Norway
| | - Helge Stenvold
- Department of Oncology, University Hospital of North Norway, Tromso, Norway
| | - Samer Al-Saad
- Department of Medical Biology, UiT The Arctic University of Norway, Tromso, Norway.,Department of Clinical Pathology, University Hospital of North Norway, Tromso, Norway
| | - Tom Donnem
- Department of Clinical Medicine, UiT The Arctic University of Norway, Tromso, Norway.,Department of Oncology, University Hospital of North Norway, Tromso, Norway
| | - Elin Richardsen
- Department of Medical Biology, UiT The Arctic University of Norway, Tromso, Norway.,Department of Clinical Pathology, University Hospital of North Norway, Tromso, Norway
| | - Roy M Bremnes
- Department of Clinical Medicine, UiT The Arctic University of Norway, Tromso, Norway.,Department of Oncology, University Hospital of North Norway, Tromso, Norway
| | - Lill-Tove Rasmussen Busund
- Department of Medical Biology, UiT The Arctic University of Norway, Tromso, Norway.,Department of Clinical Pathology, University Hospital of North Norway, Tromso, Norway
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16
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Yan F, Tu Z, Duan L, Wang D, Lin F. MicroRNA-383 suppresses cell proliferation and invasion in colorectal cancer by directly targeting paired box 6. Mol Med Rep 2018; 17:6893-6901. [PMID: 29512711 DOI: 10.3892/mmr.2018.8682] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2017] [Accepted: 11/09/2017] [Indexed: 12/16/2022] Open
Abstract
Colorectal cancer (CRC) is the third-most prevalent cancer and the fourth‑most common cause of cancer-associated fatality worldwide. The expression and biological roles of microRNAs (miRNAs/miRs) in tumourigenesis, and their regulatory function in a number of biological processes correlated with cancer have been investigated. miR‑383 has been reported to be deregulated in several human cancer types. However, the involvement and effects of miR‑383 on CRC progression and its underlying mechanism remain unknown. Therefore, the present study aimed to examine miR‑383 expression, investigate the biological functions of miR‑383 and identify its mechanism of action in CRC cells. In the present study, miR‑383 was significantly downregulated in CRC tissues and cell lines. Low miR‑383 expression was negatively associated with tumour size, lymph node metastasis and TNM stage. Function experiments demonstrated that miR‑383 upregulation inhibited the proliferation and invasion of CRC cells. Paired box 6 (PAX6) was confirmed as a direct target of miR‑383. PAX6 was upregulated in CRC tissues and was negatively correlated with miR‑383 expression. Induced PAX6 overexpression effectively rescued the tumour‑suppressing roles of miR‑383 on CRC cell proliferation and invasion. These findings suggested that miR‑383 may act as a tumour suppressor in CRC by directly targeting PAX6 and may serve as a promising therapeutic target for CRC treatment.
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Affiliation(s)
- Fei Yan
- Department of Oncology, The Eighth People's Hospital of Shanghai, Shanghai 200233, P.R. China
| | - Zhiquan Tu
- Department of Oncology, The Eighth People's Hospital of Shanghai, Shanghai 200233, P.R. China
| | - Li Duan
- Department of Oncology, The Eighth People's Hospital of Shanghai, Shanghai 200233, P.R. China
| | - Dexing Wang
- Department of Oncology, The Eighth People's Hospital of Shanghai, Shanghai 200233, P.R. China
| | - Feng Lin
- Department of Oncology, The Eighth People's Hospital of Shanghai, Shanghai 200233, P.R. China
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17
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Cao Q, Mao ZD, Shi YJ, Chen Y, Sun Y, Zhang Q, Song L, Peng LP. MicroRNA-7 inhibits cell proliferation, migration and invasion in human non-small cell lung cancer cells by targeting FAK through ERK/MAPK signaling pathway. Oncotarget 2018; 7:77468-77481. [PMID: 27764812 PMCID: PMC5363598 DOI: 10.18632/oncotarget.12684] [Citation(s) in RCA: 59] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Accepted: 09/02/2016] [Indexed: 12/20/2022] Open
Abstract
OBJECTIVE To investigate the effects of microRNA-7 (miR-7) on the proliferation, migration and invasion of non-small cell lung cancer NSCLC) cells by targeting FAK through ERK/MAPK signaling pathway. METHODS NSCLC tissues and adjacent normal tissues were obtained from 160 NSCLC patients after operation. NSCLC cell lines (A549, H1299 and H1355) and a normal human fetal lung fibroblast cell line (MRC-5) were obtained. NSCLC cells were assigned into miR-7 inhibitors, miR-7 mimics, blank, miR-7 mimics control, miR-7 inhibitors control, FAK siRNA and miR-7 inhibitors + FAK siRNA groups. The expressions of miR-7 and FAK mRNA in tissues and cell lines were detected by qRT-PCR and Western-Blotting. Cell proliferation, migration and invasion were detected by MTT assay, wound scratch assay and Transwell assay. RESULTS Compared with adjacent normal tissues, miR-7 expression was down-regulated, but the mRNA and protein expressions of FAK, ERK and MAPK were up-regulated. Compared with the blank and mimics control groups, miR-7 significantly increased but FAK, ERK and MAPK expressions decreased in miR-7 mimics and FAK siRNA groups. Cell proliferation, migration and invasion were inhibited in the miR-7 mimics and FAK siRNA groups, while opposite regarding miR-7 inhibitors group. CONCLUSION The miR-7 can inhibit the activation of ERK/MAPK signaling pathway by down-regulating FAK expression, thereby suppressing the proliferation, migration and invasion of NSCLC cells. The miR-7 and its target gene FAK may be novel targets for the diagnosis and treatment of NSCLC.
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Affiliation(s)
- Qi Cao
- Department of Respiratory Medicine, Affiliated Changzhou No.2 People's Hospital, Nanjing Medical University, Changzhou 213003, P.R. China
| | - Zheng-Dao Mao
- Department of Respiratory Medicine, Affiliated Changzhou No.2 People's Hospital, Nanjing Medical University, Changzhou 213003, P.R. China
| | - Yu-Jia Shi
- Department of Respiratory Medicine, Affiliated Changzhou No.2 People's Hospital, Nanjing Medical University, Changzhou 213003, P.R. China
| | - Yi Chen
- Department of Respiratory Medicine, Affiliated Changzhou No.2 People's Hospital, Nanjing Medical University, Changzhou 213003, P.R. China
| | - Yun Sun
- Department of Respiratory Medicine, Affiliated Changzhou No.2 People's Hospital, Nanjing Medical University, Changzhou 213003, P.R. China
| | - Qian Zhang
- Department of Respiratory Medicine, Affiliated Changzhou No.2 People's Hospital, Nanjing Medical University, Changzhou 213003, P.R. China
| | - Lei Song
- Department of Respiratory Medicine, Affiliated Changzhou No.2 People's Hospital, Nanjing Medical University, Changzhou 213003, P.R. China
| | - Li-Ping Peng
- Department of Respiratory Medicine, Affiliated Changzhou No.2 People's Hospital, Nanjing Medical University, Changzhou 213003, P.R. China
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18
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廖 晓, 尹 蔚, 王 芳, 邬 力, 黄 柏. [Construction of a lentiviral vector carrying short?hairpin RNA targeting PAX6 and its effect on proliferation of glioma U251 cells in vitro]. NAN FANG YI KE DA XUE XUE BAO = JOURNAL OF SOUTHERN MEDICAL UNIVERSITY 2017; 37:1603-1608. [PMID: 29292252 PMCID: PMC6744028 DOI: 10.3969/j.issn.1673-4254.2017.12.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 05/23/2017] [Indexed: 06/07/2023]
Abstract
OBJECTIVE To construct a lentiviral vector for delivering short hairpin RNA (shRNA) targeting PAX6 and investigate its effect on the proliferation of glioma U251 cells in vitro. METHODS Two small interfering RNA sequences targeting PAX6 gene were designed based on the reported sequence of PAX6 and annealed to form a double?stranded chain, which was inserted into a lentiviral vector to construct the recombinant lentiviral vector shRNA?PAX6. The recombinant vector was infected into U251 cells, and the expression of PAX6 mRNA and protein in the cells was detected by real?time PCR and Western blotting, respectively. The changes in the proliferation of U251 cells after the infection was assessed using MTT assay. RESULTS Double enzyme digestion of the lentiviral vector pLKD?CMV?G&NR?U6?shRNA yielded an 8208?bp fragment, and colony PCR and sequencing analysis confirmed successful construction of the lentiviral vector shRNA?PAX6. Infection of the cells with shRNA?PAX6 caused a significant reduction of the expressions of PAX6 mRNA and protein (P<0.05) and resulted in obviously increased proliferation of U251 cells (P<0.05). CONCLUSION We successfully constructed the recombinant vector shRNA?PAX6 for silencing PAX6 gene. PAX6 gene silencing results in increased proliferation of U251 cells in vitro.
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Affiliation(s)
- 晓红 廖
- />中南大学湘雅医学院生理学系,湖南 长沙 410078Department of Physiology, Xiangya School of Medicine, Central South University, Changsha 410078, China
| | - 蔚兰 尹
- />中南大学湘雅医学院生理学系,湖南 长沙 410078Department of Physiology, Xiangya School of Medicine, Central South University, Changsha 410078, China
| | - 芳 王
- />中南大学湘雅医学院生理学系,湖南 长沙 410078Department of Physiology, Xiangya School of Medicine, Central South University, Changsha 410078, China
| | - 力祥 邬
- />中南大学湘雅医学院生理学系,湖南 长沙 410078Department of Physiology, Xiangya School of Medicine, Central South University, Changsha 410078, China
| | - 柏胜 黄
- />中南大学湘雅医学院生理学系,湖南 长沙 410078Department of Physiology, Xiangya School of Medicine, Central South University, Changsha 410078, China
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19
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Xin Z, Ma Q, Ren S, Wang G, Li F. The understanding of circular RNAs as special triggers in carcinogenesis. Brief Funct Genomics 2017; 16:80-86. [PMID: 26874353 DOI: 10.1093/bfgp/elw001] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Circular RNAs (circRNAs) are a large type of noncoding RNAs characterized by their circular shape resulting from covalently closed continuous loops. They are known to regulate gene expression in mammals. These tissue-specific transcripts are largely generated from exonic or intronic sequences of their host genes. Although several models of circRNA biogenesis have been proposed, the understanding of their origin is far from complete. Unlike other noncoding RNAs, circRNAs are widely expressed, highly conserved and stable in cytoplasm, which confer special functionalities to them. They are known to serve as microRNA (miRNA) sponges, regulators of alternative splicing, transcription factors and encode for proteins. The expression of circRNAs is associated with several pathological states and may potentially serve as novel diagnostic or predictive biomarkers. CircRNAs are known to regulate the expression of numerous cancer-related miRNAs. The circRNA-miRNA-mRNA axis is a known regulatory pattern of several cancer-associated pathways, with both agonist and antagonist effects on carcinogenesis. In consideration of their potential clinical relevance, circRNAs are at the center of ongoing research initiatives on cancer prevention and treatment. In this review, we discuss the current understanding of circRNAs and the prospects for their potential clinical application in the management of cancer patients.
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Affiliation(s)
- Zhuoyuan Xin
- Department of Pathogenobiology, The Key Laboratory of Zoonosis, Chinese Ministry of Education, College of Basic Medicine, Jilin University, Changchun, Jilin, China
| | - Qin Ma
- School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Shuangchun Ren
- The Key Laboratory for Bionics Engineering, Ministry of Education, College of Basic Medical Science, Jilin University, Changchun, China
| | - Guoqing Wang
- Department of Pathogenobiology, The Key Laboratory of Zoonosis, Chinese Ministry of Education, College of Basic Medicine, Jilin University, Changchun, Jilin, China; The Key Laboratory for Bionics Engineering, Ministry of Education, China, Jilin University, Changchun, China
| | - Fan Li
- Department of Pathogenobiology, The Key Laboratory of Zoonosis, Chinese Ministry of Education, College of Basic Medicine, Jilin University, Changchun, Jilin, China; The Key Laboratory for Bionics Engineering, Ministry of Education, China, Jilin University, Changchun, China
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20
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Wang Y, Wang Q, Song J. Inhibition of autophagy potentiates the proliferation inhibition activity of microRNA-7 in human hepatocellular carcinoma cells. Oncol Lett 2017; 14:3566-3572. [PMID: 28927113 PMCID: PMC5588049 DOI: 10.3892/ol.2017.6573] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Accepted: 04/21/2017] [Indexed: 12/21/2022] Open
Abstract
MicroRNAs (miRNAs/miRs) are important molecules that are able to regulate multiple cellular processes in cancer cells. miR-7 has been previously identified as a tumor suppressive miRNA in several types of cancer. The aim of the present study was to investigate whether miR-7 is able to regulate autophagy in hepatocellular carcinoma (HCC) cells. It was identified that miR-7 was significantly downregulated in tumor tissues compared with adjacent normal tissues. Overexpression of miR-7 inhibited cell proliferative activity, which was partially reversed by miR-7 inhibitor. In addition, overexpression of miR-7 significantly induced an increasen in autophagic activity, and luciferase activity assay and western blot analysis identified that mammalian target of rapamycin (mTOR) was a direct target of miR-7. In addition, inhibition of autophagy by 3-methyladenine resulted in a marked enhancement of the proliferation inhibition effect of miR-7. In conclusion, miR-7 was identified to induce proliferation inhibition and autophagy in HCC cells by targeting mTOR, and inhibition of autophagy may be utilized to enhance the antitumor activity of miR-7.
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Affiliation(s)
- Yanna Wang
- Department of Infectious Diseases, Yantai Hospital For Infectious Diseases, Yantai, Shandong 264001, P.R. China
| | - Qiaoling Wang
- Department of Infectious Diseases, Yantai Hospital For Infectious Diseases, Yantai, Shandong 264001, P.R. China
| | - Jiqing Song
- Nursing Department of Yantai Yeda Hospital, Yantai, Shandong 264006, P.R. China
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21
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Zou Q, Yi W, Huang J, Fu F, Chen G, Zhong D. MicroRNA-375 targets PAX6 and inhibits the viability, migration and invasion of human breast cancer MCF-7 cells. Exp Ther Med 2017; 14:1198-1204. [PMID: 28810579 DOI: 10.3892/etm.2017.4593] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2015] [Accepted: 02/10/2017] [Indexed: 12/13/2022] Open
Abstract
MicroRNAs (miRs) are a type of small non-coding RNA that serve crucial roles in the development and progression of breast cancer. However, the exact role and underlying molecular mechanism of miR-375 in mediating the growth and metastasis of breast cancer remains unknown. In the present study, reverse transcription-quantitative polymerase chain reaction and western blot analysis were conducted to examine RNA and protein expression. A luciferase reporter assay was performed to determine the association between miR-375 and paired box 6 (PAX6). The results of the current study indicate that the expression of miR-375 was reduced in breast cancer tissues compared with matched adjacent normal tissues. Transfection with miR-375 mimics led to a significant increase in levels of miR-375 in human breast cancer Michigan Cancer Foundation (MCF)-7 cells (P<0.05). The increase in miR-375 expression caused a significant decrease in the viability, migration and invasion of MCF-7 cells (P<0.05), accompanied by a reduced expression of matrix metalloproteinase (MMP) 2 and MMP9 proteins. Luciferase reporter assay identified PAX6 as a novel target of miR-375 and miR-375 in turn, negatively regulated the protein expression of PAX6 in MCF-7 cells. By contrast, overexpression of PAX6 led to a significant increase in MCF-7 cell viability (P<0.01) but did not affect the migration and invasion of MCF-7 cells, suggesting that the inhibitory effect of miR-375 on MCF-7 cell viability may be occurring, in part, via the direct targeting of PAX6.
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Affiliation(s)
- Qiongyan Zou
- Department of General Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Wenjun Yi
- Department of General Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Jianghai Huang
- Department of General Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Fenfen Fu
- Department of General Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Gannong Chen
- Department of General Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
| | - Dewu Zhong
- Department of General Surgery, The Second Xiangya Hospital of Central South University, Changsha, Hunan 410011, P.R. China
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22
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Breviscapine suppresses the growth of non-small cell lung cancer by enhancing microRNA-7 expression. J Biosci 2017; 42:121-129. [PMID: 28229971 DOI: 10.1007/s12038-017-9670-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Breviscapine (BVP) has previously been shown to inhibit the proliferation of hepatocellular carcinoma cells. However, little is known about the effects of BVP on non-small cell lung cancer (NSCLC) growth. Here, we aimed to study the effects of BVP on human NSCLC growth. We employed A549, NCL-H460 and A549 cells transfected with microRNA-7 (miR-7) mimic and inhibitor to investigate the effect of BVP on cell proliferation, apoptosis and apoptosis-associated molecules. The results showed that BVP significantly reduced the growth of A549 and NCLH460 cells in a concentration-dependent and time-dependent manner, accompanied by a significant elevation of apoptosis. Additionally, the present study also confirmed that BVP-treated A549 cells showed increased levels of Bax and microRNA-7 (miR-7) and a decreased level of Bcl-2. The up-regulation of miR-7 enhanced the BVP sensitivity of NSCLC cells by suppressing cell proliferation and promoting cell apoptosis, while the inhibition of miR-7 reversed the anti-proliferative pro-apoptotic effects of BVP. Pre-treatment with miR-7 mimics enhanced the BVP-mediated down-regulation of Bax/Bcl-2 in NSCLC cells, while pre-treatment with the miR-7 inhibitor blocked the BVPmediated down-regulation of Bax/Bcl. Taken together, these results confirm that BVP effectively inhibits NSCLC proliferation and that miR-7, as a novel target, is likely involved in BVP-induced growth suppression and the apoptosis of NSCLC cells.
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Lei L, Chen C, Zhao J, Wang H, Guo M, Zhou Y, Luo J, Zhang J, Xu L. Targeted Expression of miR-7 Operated by TTF-1 Promoter Inhibited the Growth of Human Lung Cancer through the NDUFA4 Pathway. MOLECULAR THERAPY. NUCLEIC ACIDS 2016; 6:183-197. [PMID: 28325285 PMCID: PMC5363496 DOI: 10.1016/j.omtn.2016.12.005] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/14/2016] [Revised: 12/04/2016] [Accepted: 12/05/2016] [Indexed: 01/05/2023]
Abstract
Targeted expression of gene technique is an important therapeutic strategy for lung cancer. MicroRNA-7 has been well documented as a promising tumor suppressor but never been test in specific gene-promoter-targeted expression in cancer gene therapy. Here, we first evaluated the efficacy of miR-7 expression operated by the promoter of TTF-1, a lineage-specific oncogene in lung cancer, in vitro using an eukaryotic vector of TTF-1-promoter-operated expression of miR-7 (termed as p-T-miR-7). Interestingly, using a nude mice model, the growth and metastasis of human lung cancer cells in vivo were significantly reduced in remote hypodermic injection of the p-T-miR-7 group, accompanied by increased expression of miR-7 and reduced transduction of the Akt and Erk pathway in situ. Mechanism aspect, global gene expression analysis showed that downregulation of NDUFA4, a novel target of miR-7, contributed to the effects of miR-7 expression operated by TTF-1 promoter on the growth and metastasis of human lung cancer cells, as well as altered transduction of the Akt and Erk pathway. Finally, there was no significant difference in weight or histopathology of other organs. These data provided a basis for development of novel modality of miRNA-based targeted expression therapy against clinical lung cancer.
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Affiliation(s)
- Liangyu Lei
- Department of Immunology, Zunyi Medical College, Guizhou 563000, China
| | - Chao Chen
- Department of Immunology, Zunyi Medical College, Guizhou 563000, China
| | - Juanjuan Zhao
- Department of Immunology, Zunyi Medical College, Guizhou 563000, China
| | - HaiRong Wang
- Department of Immunology, Zunyi Medical College, Guizhou 563000, China
| | - Mengmeng Guo
- Department of Immunology, Zunyi Medical College, Guizhou 563000, China
| | - Ya Zhou
- Department of Medical Physics, Zunyi Medical College, Guizhou 563000, China
| | - Junming Luo
- Department of Immunology, Zunyi Medical College, Guizhou 563000, China
| | - Jidong Zhang
- Department of Immunology, Zunyi Medical College, Guizhou 563000, China
| | - Lin Xu
- Department of Immunology, Zunyi Medical College, Guizhou 563000, China.
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