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Gao Y, Qiao X, Liu Z, Zhang W. The role of E2F2 in cancer progression and its value as a therapeutic target. Front Immunol 2024; 15:1397303. [PMID: 38807594 PMCID: PMC11130366 DOI: 10.3389/fimmu.2024.1397303] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Accepted: 04/30/2024] [Indexed: 05/30/2024] Open
Abstract
The E2F family of transcription factors plays a crucial role in the regulation of cell cycle progression and cell proliferation. Accumulative evidence indicates that aberrant expression or activation of E2F2 is a common phenomenon in malignances. E2F2 has emerged as a key player in the development and progression of various types of tumors. A wealth of research has substantiated that E2F2 could contribute to the enhancement of tumor cell proliferation, angiogenesis, and invasiveness. Moreover, E2F2 exerts its influence on a myriad of cellular processes by engaging with a spectrum of auxiliary factors and downstream targets, including apoptosis and DNA repair. The dysregulation of E2F2 in the context of carcinogenesis may be attributable to a multitude of mechanisms, which encompass modifications in upstream regulatory elements or epigenetic alterations. This review explores the function of E2F2 in cancer progression and both established and emerging therapeutic strategies aiming at targeting this oncogenic pathway, while also providing a strong basis for further research on the biological function and clinical applications of E2F2.
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Affiliation(s)
- Yang Gao
- Department of Pharmacy, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, China
| | - Xinjie Qiao
- Department of Rhinology, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Zhenhui Liu
- Department of Pharmacy, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, China
| | - Wenzhou Zhang
- Department of Pharmacy, The Affiliated Cancer Hospital of Zhengzhou University & Henan Cancer Hospital, Zhengzhou, China
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2
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Xiao M, Wang J, Chen Y. E2F2 Promotes Wound Healing of Diabetic Foot Ulcer by Regulating CDCA7L Transcription. Exp Clin Endocrinol Diabetes 2023; 131:162-172. [PMID: 36893788 DOI: 10.1055/a-1989-1918] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 03/11/2023]
Abstract
OBJECTIVE The E2F2 transcription factor can accelerate cell proliferation and wound healing. However, its mechanism of action in a diabetic foot ulcer (DFU) remains unclear. Therefore, this study explores the influence of E2F2 on wound healing in DFU by examining cell division cycle-associated 7-like (CDCA7L) expression. METHODS CDCA7L and E2F2 expression in DFU tissues were analyzed with databases. CDCA7L and E2F2 expression were altered in human umbilical vein endothelial cells (HUVECs) and spontaneously transformed human keratinocyte cell culture (HaCaT) cells. Cell viability, migration, colony formation, and angiogenesis were evaluated. Binding of E2F2 to the CDCA7L promoter was examined. Subsequently, a diabetes mellitus (DM) mouse model was established and treated with full-thickness excision followed by CDCA7L overexpression. Wound healing in these mice was observed and recorded, and vascular endothelial growth factor receptor 2 (VEGFR2) and hematopoietic progenitor cell antigen CD34 (CD34) expression were determined. E2F2 and CDCA7L expression levels in cells and mice were evaluated. The expression of growth factors was tested. RESULTS CDCA7L expression was downregulated in DFU tissues and wound tissues from DM mice. Mechanistically, E2F2 bound to the CDCA7L promoter to upregulate CDCA7L expression. E2F2 overexpression enhanced viability, migration, and growth factor expression in HaCaT cells and HUVECs, and augmented HUVEC angiogenesis and HaCaT cell proliferation, which was nullified by silencing CDCA7L. In DM mice, CDCA7L overexpression facilitated wound healing and elevated the expression level of growth factors. CONCLUSIONS E2F2 facilitated cell proliferation and migration and fostered wound healing in DFU cells through binding to the CDCA7L promoter.
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Affiliation(s)
- Meimei Xiao
- Department of Hand and Foot Microsurgery, The Affiliated Nanhua Hospital, Hengyang Medical College, University of South China, Hengyang, Hunan, P.R. China
| | - Jiusong Wang
- Department of Hand and Foot Microsurgery, The Affiliated Nanhua Hospital, Hengyang Medical College, University of South China, Hengyang, Hunan, P.R. China
| | - Yanming Chen
- Department of Hand and Foot Microsurgery, The Affiliated Nanhua Hospital, Hengyang Medical College, University of South China, Hengyang, Hunan, P.R. China
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Guo Q, Ma J, Wu J. MiRNA-218 inhibits cell proliferation, migration and invasion by targeting Runt-related transcription factor 2 (Runx2) in human osteosarcoma cells. Regen Ther 2021; 18:508-515. [PMID: 34977284 PMCID: PMC8668442 DOI: 10.1016/j.reth.2021.11.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 11/11/2021] [Accepted: 11/12/2021] [Indexed: 02/03/2023] Open
Abstract
PURPOSE The deregulation of miRNA-218 has been found in a number of cancers. Using miRNA-218 as a target for Runt-related transcription factor 2 (Runx2), we sought to understand the role of miRNA-218 in osteosarcoma (OS). METHODS The expression of miRNA-218 was detected in the OS tumor tissues and OS cells. The Runx2 expression level was evaluated in Saos-2, 143B, U2OS, and MG-63. miRNA-218 overexpressed U2OS cells were achieved by transfection with miRNA-218 mimics. The role of miRNA-218 in inhibiting OS tumorigenesis was explored by CCK8, colony formation, cell wound scratch and Transwell assay. TargetScan and dual-luciferase reporter assay identified the interaction between miRNA-218 and Runx2. The inhibitive effect of miRNA-218 on OS through targeting Runx2 was also evaluated. RESULTS MiRNA-218 levels were remarkably down-regulated in OS tumor tissues and cell lines. The overexpression of miRNA-218 suppressed U2OS cell development and metastasis. The target interaction between miRNA-218 and Runx2 was validated, and their expression showed a negative correlation in U2OS cells. The suppressed U2OS cell development and metastasis were remarkably reversed by Runx2 overexpression. CONCLUSION MiRNA-218 showed an inhibitive effect on the development and metastasis of osteosarcoma cell proliferation by targeting Runx2. Our findings may provide novel clues for OS treatment.
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Affiliation(s)
- Qiang Guo
- Department of Thoracic Surgery, Jinan Fifth People's Hospital, No. 24297, Jingshi Road, Huaiyin District, Jinan City, Shandong, 250022, China
| | - Junan Ma
- Department of Orthopedics, Chengwu County People's Hospital Affiliated to First Medical University of Shandong, No. 66, Bole Street, Chengwu County, Heze City, Shndong, 274200, China
| | - Jing Wu
- Department of Orthopedics, The Affiliated Huai'an Hospital of Xuzhou Medical University, The Second People's Hospital of Huai'an, Huai'an, Jiangsu Province, 223001, China
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Wei W, Ji L, Duan W, Zhu J. CircSAMD4A contributes to cell doxorubicin resistance in osteosarcoma by regulating the miR-218-5p/KLF8 axis. Open Life Sci 2020; 15:848-859. [PMID: 33817271 PMCID: PMC7747519 DOI: 10.1515/biol-2020-0079] [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: 03/04/2020] [Revised: 06/16/2020] [Accepted: 07/19/2020] [Indexed: 02/06/2023] Open
Abstract
Circular RNA sterile alpha motif domain containing 4A (circSAMD4A) was found to be differentially expressed in osteosarcoma and contributed to the tumorigenesis of osteosarcoma. However, the role of circSAMD4A in doxorubicin (DXR) resistance of osteosarcoma is yet to be elucidated. Levels of circSAMD4A, microRNA (miR)-218-5p and Krüppel-like factor 8 (KLF8) were detected using quantitative reverse transcription-polymerase chain reaction. Western blot was applied to detect the protein levels of KLF8, cyclin D1 and p21. Cell viability, cell cycle, migration and invasion were analyzed using Cell Counting Kit-8 assay, flow cytometry and transwell assay, respectively. The interaction between miR-218-5p and circSAMD4A or KLF8 was verified using dual-luciferase reporter assay or RNA immunoprecipitation assay. In vivo experiments were performed using murine xenograft models. CircSAMD4A and KLF8 were elevated in osteosarcoma, and knockdown of circSAMD4A or KLF8 sensitized osteosarcoma cells to DXR by mediating resistant cell viability, migration and invasion inhibition, and cell cycle arrest in vitro. miR-218-5p was decreased in osteosarcoma, and miR-218-5p inhibition enhanced DXR resistance. Besides, miR-218-5p was found to bind to circSAMD4A or KLF8, and subsequent rescue experiments indicated that miR-218-5p inhibition reversed the inhibitory effects of circSAMD4A silencing on DXR resistance, and silencing miR-218-5p enhanced DXR resistance by targeting KLF8 in osteosarcoma cells. Moreover, circSAMD4A could indirectly regulate KLF8 via miR-218-5p. Additionally, circSAMD4A knockdown enhanced the cytotoxicity of DXR in osteosarcoma in vivo via regulating miR-218-5p and KLF8. In all, circSAMD4A enhanced cell DXR resistance in osteosarcoma by regulating the miR-218-5p/KLF8 axis, suggesting a novel therapeutic target for therapy-resistant osteosarcoma.
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Affiliation(s)
- Wei Wei
- Department of orthopedics, Shaoxing Shangyu People's Hospital, No. 517, Shimin Avenue, Baiguan Street, Shangyu District, Shaoxing, Zhejiang Province, 312300, China
| | - Liefeng Ji
- Department of orthopedics, Shaoxing Shangyu People's Hospital, No. 517, Shimin Avenue, Baiguan Street, Shangyu District, Shaoxing, Zhejiang Province, 312300, China
| | - Wanli Duan
- Department of orthopedics, Shaoxing Shangyu People's Hospital, No. 517, Shimin Avenue, Baiguan Street, Shangyu District, Shaoxing, Zhejiang Province, 312300, China
| | - Jiang Zhu
- Department of orthopedics, Shaoxing Shangyu People's Hospital, No. 517, Shimin Avenue, Baiguan Street, Shangyu District, Shaoxing, Zhejiang Province, 312300, China
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Pan F, Zhang J, Tang B, Jing L, Qiu B, Zha Z. The novel circ_0028171/miR-218-5p/IKBKB axis promotes osteosarcoma cancer progression. Cancer Cell Int 2020; 20:484. [PMID: 33041665 PMCID: PMC7542388 DOI: 10.1186/s12935-020-01562-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Accepted: 09/17/2020] [Indexed: 01/05/2023] Open
Abstract
Background Recently, it has been demonstrated that circular RNA (circRNA) contributes to the production and progression in human cancer. However, the specific function and underlying mechanism of circ_0028171 in osteosarcoma (OS) still remain largely unclear and require to be investigated. Methods In our study, we confirmed differentially expressed circRNAs by microarray analysis in normal bone cells vs. OS cell lines. The expression of circ-0028171 in OS was measured by qRT-PCR. Nuclear-cytoplasmic fractionation was employed to identify the localization of circ-0028171, and RNase R and actinomycin D treatment were used to prove its circular characteristic. In vitro experiments, such as CCK-8 method, cell count, cell colony formation, transwell migration and invasion assays, and in vivo tumor models were adopted to evaluate the effect of circ_0028171. Further, luciferase reporter, RIP and RNA pull-down assays were conducted to confirm the binding sites of circ_0028171 with miR-218-5p. Results We found that circ_0028171 displayed a remarkably higher expression in both OS tissues and cell lines. Circ_0028171 mainly located in the cytoplasm as a stable cyclic transcript. Knockdown of circ_0028171 suppressed OS tumor growth in vitro and in vivo, while up-regulated circ_0028171 remarkably enhanced cell proliferation, migration and invasion abilities in OS. Several mechanistic experiments revealed that circ_0028171 served as a sponge of miR-218-5p to increase IKBKB expression. Conclusions our research reveals that circ_0028171 might promote the malignant behavior of OS tissues through miR-218-5p/IKBKB axis, which could be a potential novel marker for early diagnosis of OS.
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Affiliation(s)
- Feng Pan
- Department of Bone and Joint Surgery, Institute of Orthopedic Diseases, The First Affiliated Hospital, Jinan University, Guangzhou, Guangdong China.,Department of Bone and Joint Surgery, Gui Zhou Orthopedic Hospital, Gui Zhou, China
| | - Jun Zhang
- Department of Bone and Joint Surgery, Gui Zhou Orthopedic Hospital, Gui Zhou, China
| | - Benseng Tang
- Department of Bone and Joint Surgery, Gui Zhou Orthopedic Hospital, Gui Zhou, China
| | - Li Jing
- Department of Bone and Joint Surgery, Gui Zhou Orthopedic Hospital, Gui Zhou, China
| | - Bing Qiu
- Department of Bone and Joint Surgery, Gui Zhou Orthopedic Hospital, Gui Zhou, China
| | - Zhengang Zha
- Department of Bone and Joint Surgery, Institute of Orthopedic Diseases, The First Affiliated Hospital, Jinan University, Guangzhou, Guangdong China
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Czarnecka AM, Synoradzki K, Firlej W, Bartnik E, Sobczuk P, Fiedorowicz M, Grieb P, Rutkowski P. Molecular Biology of Osteosarcoma. Cancers (Basel) 2020; 12:E2130. [PMID: 32751922 PMCID: PMC7463657 DOI: 10.3390/cancers12082130] [Citation(s) in RCA: 192] [Impact Index Per Article: 48.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Revised: 07/29/2020] [Accepted: 07/30/2020] [Indexed: 12/19/2022] Open
Abstract
Osteosarcoma (OS) is the most frequent primary bone cancer in children and adolescents and the third most frequent in adults. Many inherited germline mutations are responsible for syndromes that predispose to osteosarcomas including Li Fraumeni syndrome, retinoblastoma syndrome, Werner syndrome, Bloom syndrome or Diamond-Blackfan anemia. TP53 is the most frequently altered gene in osteosarcoma. Among other genes mutated in more than 10% of OS cases, c-Myc plays a role in OS development and promotes cell invasion by activating MEK-ERK pathways. Several genomic studies showed frequent alterations in the RB gene in pediatric OS patients. Osteosarcoma driver mutations have been reported in NOTCH1, FOS, NF2, WIF1, BRCA2, APC, PTCH1 and PRKAR1A genes. Some miRNAs such as miR-21, -34a, -143, -148a, -195a, -199a-3p and -382 regulate the pathogenic activity of MAPK and PI3K/Akt-signaling pathways in osteosarcoma. CD133+ osteosarcoma cells have been shown to exhibit stem-like gene expression and can be tumor-initiating cells and play a role in metastasis and development of drug resistance. Although currently osteosarcoma treatment is based on adriamycin chemoregimens and surgery, there are several potential targeted therapies in development. First of all, activity and safety of cabozantinib in osteosarcoma were studied, as well as sorafenib and pazopanib. Finally, novel bifunctional molecules, of potential imaging and osteosarcoma targeting applications may be used in the future.
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Affiliation(s)
- Anna M Czarnecka
- Department of Experimental Pharmacology, Mossakowski Medical Research Centre, Polish Academy of Sciences, 02-106 Warsaw, Poland
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie Institute-Oncology Centre, 02-781 Warsaw, Poland
| | - Kamil Synoradzki
- Department of Experimental Pharmacology, Mossakowski Medical Research Centre, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Wiktoria Firlej
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie Institute-Oncology Centre, 02-781 Warsaw, Poland
- Faculty of Medicine, Medical University of Warsaw, 02-091 Warsaw, Poland
| | - Ewa Bartnik
- Institute of Genetics and Biotechnology, Faculty of Biology, University of Warsaw, 02-106 Warsaw, Poland
- Institute of Biochemistry and Biophysics, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Pawel Sobczuk
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie Institute-Oncology Centre, 02-781 Warsaw, Poland
- Department of Experimental and Clinical Physiology, Laboratory of Centre for Preclinical Research, Medical University of Warsaw, 02-097 Warsaw, Poland
| | - Michal Fiedorowicz
- Small Animal Magnetic Resonance Imaging Laboratory, Mossakowski Medical Research Centre, Polish Academy of Sciences, 02-106 Warsaw, Poland
- Interinstitute Laboratory of New Diagnostic Applications of MRI, Nalecz Institute of Biocybernetics and Biomedical Engineering, Polish Academy of Sciences, 02-109 Warsaw, Poland
| | - Pawel Grieb
- Department of Experimental Pharmacology, Mossakowski Medical Research Centre, Polish Academy of Sciences, 02-106 Warsaw, Poland
| | - Piotr Rutkowski
- Department of Soft Tissue/Bone Sarcoma and Melanoma, Maria Sklodowska-Curie Institute-Oncology Centre, 02-781 Warsaw, Poland
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Jia G, Wang Y, Yu Y, Li Z, Wang X. Long non‑coding RNA NR2F1‑AS1 facilitates the osteosarcoma cell malignant phenotype via the miR‑485‑5p/miR‑218‑5p/BIRC5 axis. Oncol Rep 2020; 44:1583-1595. [PMID: 32945459 PMCID: PMC7448419 DOI: 10.3892/or.2020.7698] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 06/17/2020] [Indexed: 12/18/2022] Open
Abstract
Long non-coding RNA (lncRNA) NR2F1 antisense RNA 1 (NR2F1-AS1) has been reported to be an oncogene in several cancer types, including osteosarcoma (OS). However, the underlying fundamental molecular mechanism of NR2F1-AS1 in OS remains largely unknown, which the present study aimed to elucidate. The present study demonstrated that NR2F1-AS1 expression is markedly increased in OS, and NR2F1-AS1 was shown to exert oncogenic functions in OS. Further molecular mechanistic studies revealed that microRNA (miR)-485-5p and miR-218-5p were direct targets of NR2F1-AS1. More importantly, miR-485-5p and miR-218-5p exhibited low expression levels and were negatively correlated with NR2F1-AS1 expression in OS tissues. It was then identified that baculoviral inhibitor of apoptosis repeat-containing 5 (BIRC5) was a direct target of miR-485-5p and miR-218-5p in OS cells. Furthermore, a series of experiments suggested that NR2F1-AS1 affects the proliferation, migration, invasion and apoptosis of OS cells by regulating BIRC5. Finally, it was revealed that silencing of NR2F1-AS1 repressed the OS cell malignant phenotype by binding with miR-485-5p and miR-218-5p, and then downregulating BIRC5 expression, which suggests that the NR2F1-AS1/miR-485-5p/miR-218-5p/BIRC5 axis could be a potential target for treating OS.
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Affiliation(s)
- Guanghui Jia
- Department of Foot and Ankle Surgery, Zhengzhou Orthopedics Hospital, Zhengzhou, Henan 450052, P.R. China
| | - Yalei Wang
- Department of Foot and Ankle Surgery, Zhengzhou Orthopedics Hospital, Zhengzhou, Henan 450052, P.R. China
| | - Yali Yu
- Department of Laboratory, Zhengzhou Orthopedics Hospital, Zhengzhou, Henan 450052, P.R. China
| | - Zijun Li
- Department of Laboratory, Zhengzhou Orthopedics Hospital, Zhengzhou, Henan 450052, P.R. China
| | - Xiangyu Wang
- Department of Foot and Ankle Surgery, Zhengzhou Orthopedics Hospital, Zhengzhou, Henan 450052, P.R. China
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Lin E, Liu S, Xiang W, Zhang H, Xie C. CircEIF4G2 Promotes Tumorigenesis and Progression of Osteosarcoma by Sponging miR-218. BIOMED RESEARCH INTERNATIONAL 2020; 2020:8386936. [PMID: 32596384 PMCID: PMC7273497 DOI: 10.1155/2020/8386936] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2020] [Accepted: 03/30/2020] [Indexed: 12/19/2022]
Abstract
Circular RNAs (circRNAs) play a key role in regulating the tumorigenesis and development of human cancers, including osteosarcoma (OS). Of note, the molecular mechanism underlying the progression of OS has remained largely unclear. The present study identified that a novel circRNA circEIF4G2 was upregulated in OS tissues and cells. Moreover, we constructed a circEIF4G2-mediated ceRNA network and revealed that circEIF4G2 was involved in regulating multiple cancer pathways, such as the EGFR signaling pathway, the PI3K-Akt signaling pathway, and the ErbB signaling pathway. Loss-of-function assays showed that circEIF4G2 knockdown significantly suppressed OS cell proliferation, migration, and invasion. Mechanically, we found that circEIF4G2 could directly bind to miR-218, and miR-218 mediated the effect of circEIF4G2 knockdown on OS progression. In conclusion, the present study showed that circEIF4G2 could be a potential biomarker for OS.
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Affiliation(s)
- Erhu Lin
- Spinal Surgery Department, Shenzhen People's Hospital, Shenzhen, Guangdong 518000, China
| | - Shuai Liu
- Orthopedics Department, The Eight Affiliated Hospital of Sun Yat-sen University, Shenzhen, Guangdong 518000, China
| | - Wei Xiang
- Orthopedics Department, The Eight Affiliated Hospital of Sun Yat-sen University, Shenzhen, Guangdong 518000, China
| | - Hongbo Zhang
- Orthopedics Department, The Eight Affiliated Hospital of Sun Yat-sen University, Shenzhen, Guangdong 518000, China
| | - Chaofan Xie
- Orthopedics Department, The Eight Affiliated Hospital of Sun Yat-sen University, Shenzhen, Guangdong 518000, China
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Gu C, Zou S, He C, Zhou J, Qu R, Wang Q, Qi J, Zhou M, Yan S, Ye Z. Long non-coding RNA CCAT1 promotes colorectal cancer cell migration, invasiveness and viability by upregulating VEGF via negative modulation of microRNA-218. Exp Ther Med 2020; 19:2543-2550. [PMID: 32256733 PMCID: PMC7086191 DOI: 10.3892/etm.2020.8518] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2019] [Accepted: 01/28/2020] [Indexed: 01/28/2023] Open
Abstract
Increasing evidence has demonstrated that long non-coding (lnc) RNA is aberrantly expressed in numerous types of cancer. Colorectal cancer is a common malignancy; however, the role and mechanism underlying the influence of lncRNA-colon cancer associated transcript 1 (CCAT1) in colorectal cancer is yet to be elucidated. The present study revealed that CCAT1 is highly expressed in colorectal cancer tissues. Bioinformatics analysis and a dual-luciferase reporter gene assay indicated that CCAT1 and microRNA (miR)-218 had complementary binding sites. Furthermore, reverse transcription-quantitative PCR revealed that miR-218 was downregulated in colorectal cancer tissues compared with paired adjacent healthy tissues. To investigate the biological effects of CCAT1 on colorectal cancer cells, MTT and Transwell assays were performed. The results revealed that when compared with the control group, CCAT1-short hairpin (sh)RNA significantly inhibited colorectal cancer cell (SW480) viability and decreased migration and invasiveness. In addition, CCAT1-shRNA significantly reduced vascular endothelial growth factor (VEGF) expression in SW480 cells; however, these effects were partially rescued by an miR-218 inhibitor. Furthermore, it was revealed that the CCAT1-plasmid significantly promoted the viability of SW480 cells, increased cell migration and invasiveness, and significantly increased VEGF expression. However, these effects were also partially rescued by with a miR-218 mimic. Taken together, the present results identified that the CCAT1/miR-218 axis serves a key role in the regulation of colorectal cancer progression, which may be used as potential therapeutic target for the treatment of colorectal cancer.
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Affiliation(s)
- Chao Gu
- Gastrointestinal Surgery Department, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, Jiangsu 215000, P.R. China
| | - Shitao Zou
- Suzhou Cancer Center Core Laboratory, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, Jiangsu 215000, P.R. China
| | - Chao He
- Suzhou Cancer Center Core Laboratory, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, Jiangsu 215000, P.R. China
| | - Jundong Zhou
- Suzhou Cancer Center Core Laboratory, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, Jiangsu 215000, P.R. China
| | - Rui Qu
- Clinical Laboratory, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, Jiangsu 215000, P.R. China
| | - Qin Wang
- Gastrointestinal Surgery Department, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, Jiangsu 215000, P.R. China
| | - Jie Qi
- Thyroid and Breast Surgery Department, The Affiliated Suzhou Hospital of Nanjing Medical University, Suzhou, Jiangsu 215000, P.R. China
| | - Ming Zhou
- General Surgery, The Second Clinical Medical College, Yangtze University, Jingzhou Central Hospital, Jingzhou, Hubei 434020, P.R. China
| | - Shuai Yan
- Colorectal Surgery, Suzhou TCM Hospital Affiliated to Nanjing University of Chinese Medicine, Suzhou, Jiangsu 215009, P.R. China
| | - Zhenyu Ye
- Department of Hepatobiliary Surgery, The Second Affiliated Hospital of Soochow University, Suzhou, Jiangsu 215000, P.R. China
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10
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Zhang L, Yang L, Xia ZW, Yang SC, Li WH, Liu B, Yu ZQ, Gong PF, Yang YL, Sun WZ, Mo J, Li GS, Wang TY, Wang K. The role of fibroblast activation protein in progression and development of osteosarcoma cells. Clin Exp Med 2020; 20:121-130. [PMID: 31745677 DOI: 10.1007/s10238-019-00591-6] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2019] [Accepted: 10/28/2019] [Indexed: 12/11/2022]
Abstract
To investigate the expression levels of fibroblast activation protein (FAP) in human osteosarcoma tissues and its possible correlations with clinical pathological characteristics of patients with osteosarcoma, and to explore the potential effects of FAP on progression and development of osteosarcoma. Immunohistochemistry (IHC) assay was initially performed to detect the expression levels of FAP in 66 tumor tissues and adjacent non-tumor tissues. Patients were sequentially divided into two groups based on different expression levels of FAP. The correlations between the expression levels of FAP and the clinical pathological characteristics were investigated, and the role of FAP in proliferation, migration, and invasion of osteosarcoma cells was assessed via colony formation, MTT, wound healing, and transwell assays, respectively. The possible effects of FAP on tumor growth and metastasis were evaluated in vivo. We further attempted to reveal the underlying mechanism of FAP involved in tumor growth through bioinformatics and IHC assays. High expression levels of FAP were noted in human osteosarcoma tissues. It also was unveiled that FAP was significantly associated with the tumor size (P = 0.005*) and clinical stage (P = 0.017*). Our data further confirmed that knockdown of FAP remarkably blocked proliferation, migration, and invasion of osteosarcoma cells in vitro, and suppressed tumor growth and metastasis in mice via AKT signaling pathway. The possible role of FAP in progression and development of osteosarcoma could be figured out. Our data may be helpful to develop a novel therapeutic target for the treatment of osteosarcoma.
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Affiliation(s)
- Liang Zhang
- Department of Orthopedics, The Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Li Yang
- Department of Orthopedics, The Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Zi-Wei Xia
- Department of Orthopedics, The Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Shi-Chang Yang
- Department of Orthopedics, The Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Wen-Hui Li
- Department of Orthopedics, The Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Bin Liu
- Department of Gastrointestinal Surgery, The Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Zi-Qi Yu
- Department of Orthopedics, The Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Peng-Fei Gong
- Department of Orthopedics, The Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Ya-Lin Yang
- Department of Orthopedics, The Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Wei-Zong Sun
- Department of Orthopedics, The Second Hospital of Tianjin Medical University, Tianjin, 300211, China
| | - Jing Mo
- Department of Pathology, Tianjin Medical University, Tianjin, 300070, China
| | - Gui-Shi Li
- Department of Joint Orthopedics, Yantai Yuhuangding Hospital, Yantai, 264000, Shandong Province, China
| | - Tian-Yi Wang
- Department of Orthopedics, The 981st Hospital of the Chinese People's Liberation Army, Chengde, 067000, Hebei Province, China.
| | - Kai Wang
- Department of Orthopedics, The Second Hospital of Tianjin Medical University, Tianjin, 300211, China.
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