Upregulated circular RNA circ_0007534 indicates an unfavorable prognosis in pancreatic ductal adenocarcinoma and regulates cell proliferation, apoptosis, and invasion by sponging miR‐625 and miR‐892b
Circular RNAs (circRNAs) have been regarded as critical regulators of human diseases and biological markers in some types of malignancies, including pancreatic ductal adenocarcinoma (PDAC). Recently, circ_0007534 has been identified as a novel cancer‐related circRNA. Nevertheless, its clinical relev...
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Published in | Journal of cellular biochemistry Vol. 120; no. 3; pp. 3780 - 3789 |
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Abstract | Circular RNAs (circRNAs) have been regarded as critical regulators of human diseases and biological markers in some types of malignancies, including pancreatic ductal adenocarcinoma (PDAC). Recently, circ_0007534 has been identified as a novel cancer‐related circRNA. Nevertheless, its clinical relevance, functional roles, and mechanism have not been studied in PDAC. In the current study, real‐time quantitative polymerase chain reaction (RT‐qPCR) was used to detect the expression of circ_0007534 in 60‐paired PDAC tissue samples and different cell lines. Loss‐of‐function and gain‐of‐function assays were performed to detect cell proliferation, apoptosis, and metastatic properties affected by circ_0007534. An animal study was also carried out. The luciferase reporter assay was performed to uncover the underlying mechanism of circ_0007534. As a result, circ_0007534 was overexpressed not only in PDAC tissues but also in a panel of PDAC cell lines, and this overexpression is closely associated with advanced tumor stage and positive lymph node invasion. In addition, circ_0007534 may be regarded as an independent prognostic factor for patients with PDAC. For the part of functional assays, circ_0007534 significantly increased cell proliferation, migratory, and invasive potential of PDAC cells. Circ_0007534 could inhibit cell apoptosis partly via a Bcl‐2/caspase‐3 pathway. The xenograft study further confirmed the cell growth promoting the role of circ_0007534. Mechanistically, miR‐625 and miR‐892b were sponged by circ_0007534. The oncogenic functions of circ_0007534 is partly dependent on its regulation of miR‐625 and miR‐892b. In conclusion, our study illuminates a novel circRNA that confers an oncogenic function in PDAC.
Circ_0007534 is upregulated in pancreatic ductal adenocarcinoma (PDAC) both in tissues and cells.
Circ_0007534 is associated with patients’ adverse phenotypes and poor survival.
The circ_0007534/miR‐625/miR‐892 regulatory axis may contribute to the carcinogenesis and development of PDAC. |
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AbstractList | Circular RNAs (circRNAs) have been regarded as critical regulators of human diseases and biological markers in some types of malignancies, including pancreatic ductal adenocarcinoma (PDAC). Recently, circ_0007534 has been identified as a novel cancer‐related circRNA. Nevertheless, its clinical relevance, functional roles, and mechanism have not been studied in PDAC. In the current study, real‐time quantitative polymerase chain reaction (RT‐qPCR) was used to detect the expression of circ_0007534 in 60‐paired PDAC tissue samples and different cell lines. Loss‐of‐function and gain‐of‐function assays were performed to detect cell proliferation, apoptosis, and metastatic properties affected by circ_0007534. An animal study was also carried out. The luciferase reporter assay was performed to uncover the underlying mechanism of circ_0007534. As a result, circ_0007534 was overexpressed not only in PDAC tissues but also in a panel of PDAC cell lines, and this overexpression is closely associated with advanced tumor stage and positive lymph node invasion. In addition, circ_0007534 may be regarded as an independent prognostic factor for patients with PDAC. For the part of functional assays, circ_0007534 significantly increased cell proliferation, migratory, and invasive potential of PDAC cells. Circ_0007534 could inhibit cell apoptosis partly via a Bcl‐2/caspase‐3 pathway. The xenograft study further confirmed the cell growth promoting the role of circ_0007534. Mechanistically, miR‐625 and miR‐892b were sponged by circ_0007534. The oncogenic functions of circ_0007534 is partly dependent on its regulation of miR‐625 and miR‐892b. In conclusion, our study illuminates a novel circRNA that confers an oncogenic function in PDAC. Abstract Circular RNAs (circRNAs) have been regarded as critical regulators of human diseases and biological markers in some types of malignancies, including pancreatic ductal adenocarcinoma (PDAC). Recently, circ_0007534 has been identified as a novel cancer‐related circRNA. Nevertheless, its clinical relevance, functional roles, and mechanism have not been studied in PDAC. In the current study, real‐time quantitative polymerase chain reaction (RT‐qPCR) was used to detect the expression of circ_0007534 in 60‐paired PDAC tissue samples and different cell lines. Loss‐of‐function and gain‐of‐function assays were performed to detect cell proliferation, apoptosis, and metastatic properties affected by circ_0007534. An animal study was also carried out. The luciferase reporter assay was performed to uncover the underlying mechanism of circ_0007534. As a result, circ_0007534 was overexpressed not only in PDAC tissues but also in a panel of PDAC cell lines, and this overexpression is closely associated with advanced tumor stage and positive lymph node invasion. In addition, circ_0007534 may be regarded as an independent prognostic factor for patients with PDAC. For the part of functional assays, circ_0007534 significantly increased cell proliferation, migratory, and invasive potential of PDAC cells. Circ_0007534 could inhibit cell apoptosis partly via a Bcl‐2/caspase‐3 pathway. The xenograft study further confirmed the cell growth promoting the role of circ_0007534. Mechanistically, miR‐625 and miR‐892b were sponged by circ_0007534. The oncogenic functions of circ_0007534 is partly dependent on its regulation of miR‐625 and miR‐892b. In conclusion, our study illuminates a novel circRNA that confers an oncogenic function in PDAC. Circular RNAs (circRNAs) have been regarded as critical regulators of human diseases and biological markers in some types of malignancies, including pancreatic ductal adenocarcinoma (PDAC). Recently, circ_0007534 has been identified as a novel cancer-related circRNA. Nevertheless, its clinical relevance, functional roles, and mechanism have not been studied in PDAC. In the current study, real-time quantitative polymerase chain reaction (RT-qPCR) was used to detect the expression of circ_0007534 in 60-paired PDAC tissue samples and different cell lines. Loss-of-function and gain-of-function assays were performed to detect cell proliferation, apoptosis, and metastatic properties affected by circ_0007534. An animal study was also carried out. The luciferase reporter assay was performed to uncover the underlying mechanism of circ_0007534. As a result, circ_0007534 was overexpressed not only in PDAC tissues but also in a panel of PDAC cell lines, and this overexpression is closely associated with advanced tumor stage and positive lymph node invasion. In addition, circ_0007534 may be regarded as an independent prognostic factor for patients with PDAC. For the part of functional assays, circ_0007534 significantly increased cell proliferation, migratory, and invasive potential of PDAC cells. Circ_0007534 could inhibit cell apoptosis partly via a Bcl-2/caspase-3 pathway. The xenograft study further confirmed the cell growth promoting the role of circ_0007534. Mechanistically, miR-625 and miR-892b were sponged by circ_0007534. The oncogenic functions of circ_0007534 is partly dependent on its regulation of miR-625 and miR-892b. In conclusion, our study illuminates a novel circRNA that confers an oncogenic function in PDAC. Circular RNAs (circRNAs) have been regarded as critical regulators of human diseases and biological markers in some types of malignancies, including pancreatic ductal adenocarcinoma (PDAC). Recently, circ_0007534 has been identified as a novel cancer‐related circRNA. Nevertheless, its clinical relevance, functional roles, and mechanism have not been studied in PDAC. In the current study, real‐time quantitative polymerase chain reaction (RT‐qPCR) was used to detect the expression of circ_0007534 in 60‐paired PDAC tissue samples and different cell lines. Loss‐of‐function and gain‐of‐function assays were performed to detect cell proliferation, apoptosis, and metastatic properties affected by circ_0007534. An animal study was also carried out. The luciferase reporter assay was performed to uncover the underlying mechanism of circ_0007534. As a result, circ_0007534 was overexpressed not only in PDAC tissues but also in a panel of PDAC cell lines, and this overexpression is closely associated with advanced tumor stage and positive lymph node invasion. In addition, circ_0007534 may be regarded as an independent prognostic factor for patients with PDAC. For the part of functional assays, circ_0007534 significantly increased cell proliferation, migratory, and invasive potential of PDAC cells. Circ_0007534 could inhibit cell apoptosis partly via a Bcl‐2/caspase‐3 pathway. The xenograft study further confirmed the cell growth promoting the role of circ_0007534. Mechanistically, miR‐625 and miR‐892b were sponged by circ_0007534. The oncogenic functions of circ_0007534 is partly dependent on its regulation of miR‐625 and miR‐892b. In conclusion, our study illuminates a novel circRNA that confers an oncogenic function in PDAC. Circ_0007534 is upregulated in pancreatic ductal adenocarcinoma (PDAC) both in tissues and cells. Circ_0007534 is associated with patients’ adverse phenotypes and poor survival. The circ_0007534/miR‐625/miR‐892 regulatory axis may contribute to the carcinogenesis and development of PDAC. |
Author | Meng, Xin Cui, Hongsheng Bai, Lianjie Li, Yuanchun Chen, Datong Rong, Wei Zhang, Shuli Hao, Liguo |
Author_xml | – sequence: 1 givenname: Liguo orcidid: 0000-0003-2677-180X surname: Hao fullname: Hao, Liguo email: hlg2018@sina.com organization: Medical Technology Academy, Qiqihar Medical University – sequence: 2 givenname: Wei surname: Rong fullname: Rong, Wei organization: Micromorphology Research Center, Medical Pathology Academy, Qiqihar Medical University – sequence: 3 givenname: Lianjie surname: Bai fullname: Bai, Lianjie organization: The Second Affiliated Hospital of Qiqihar Medical University – sequence: 4 givenname: Hongsheng surname: Cui fullname: Cui, Hongsheng organization: The Third Affiliated Hospital of Qiqihar Medical University – sequence: 5 givenname: Shuli surname: Zhang fullname: Zhang, Shuli organization: Medical Technology Academy, Qiqihar Medical University – sequence: 6 givenname: Yuanchun surname: Li fullname: Li, Yuanchun organization: The Second Affiliated Hospital of Qiqihar Medical University – sequence: 7 givenname: Datong surname: Chen fullname: Chen, Datong organization: Medical Technology Academy, Qiqihar Medical University – sequence: 8 givenname: Xin surname: Meng fullname: Meng, Xin organization: The Third Affiliated Hospital of Qiqihar Medical University |
BackLink | https://www.ncbi.nlm.nih.gov/pubmed/30382592$$D View this record in MEDLINE/PubMed |
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Snippet | Circular RNAs (circRNAs) have been regarded as critical regulators of human diseases and biological markers in some types of malignancies, including pancreatic... Abstract Circular RNAs (circRNAs) have been regarded as critical regulators of human diseases and biological markers in some types of malignancies, including... |
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SubjectTerms | Adenocarcinoma Apoptosis Assaying Biomarkers Biotechnology Caspase Cell growth Cell migration Cell proliferation circ_0007534 Circular RNA Invasiveness Lymph nodes Metastases miR‐625 miR‐892b Pancreas Pancreatic cancer pancreatic ductal adenocarcinoma Polymerase chain reaction Regulators Ribonucleic acid RNA Tissues Xenografts Xenotransplantation |
Title | Upregulated circular RNA circ_0007534 indicates an unfavorable prognosis in pancreatic ductal adenocarcinoma and regulates cell proliferation, apoptosis, and invasion by sponging miR‐625 and miR‐892b |
URI | https://onlinelibrary.wiley.com/doi/abs/10.1002%2Fjcb.27658 https://www.ncbi.nlm.nih.gov/pubmed/30382592 https://www.proquest.com/docview/2167055798/abstract/ https://search.proquest.com/docview/2127952188 |
Volume | 120 |
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