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Yang Y, Wang P, Qaidi SE, Hardwidge PR, Huang J, Zhu G. Loss to gain: pseudogenes in microorganisms, focusing on eubacteria, and their biological significance. Appl Microbiol Biotechnol 2024; 108:328. [PMID: 38717672 PMCID: PMC11078800 DOI: 10.1007/s00253-023-12971-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2023] [Revised: 11/26/2023] [Accepted: 12/01/2023] [Indexed: 05/12/2024]
Abstract
Pseudogenes are defined as "non-functional" copies of corresponding parent genes. The cognition of pseudogenes continues to be refreshed through accumulating and updating research findings. Previous studies have predominantly focused on mammals, but pseudogenes have received relatively less attention in the field of microbiology. Given the increasing recognition on the importance of pseudogenes, in this review, we focus on several aspects of microorganism pseudogenes, including their classification and characteristics, their generation and fate, their identification, their abundance and distribution, their impact on virulence, their ability to recombine with functional genes, the extent to which some pseudogenes are transcribed and translated, and the relationship between pseudogenes and viruses. By summarizing and organizing the latest research progress, this review will provide a comprehensive perspective and improved understanding on pseudogenes in microorganisms. KEY POINTS: • Concept, classification and characteristics, identification and databases, content, and distribution of microbial pseudogenes are presented. • How pseudogenization contribute to pathogen virulence is highlighted. • Pseudogenes with potential functions in microorganisms are discussed.
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Affiliation(s)
- Yi Yang
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, 225009, Jiangsu, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, China
- Joint Laboratory of International Cooperation On Prevention and Control Technology of Important Animal Diseases and Zoonoses of Jiangsu Higher Education Institutions, Yangzhou, 225009, China
| | - Pengzhi Wang
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, 225009, Jiangsu, China
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, China
- Joint Laboratory of International Cooperation On Prevention and Control Technology of Important Animal Diseases and Zoonoses of Jiangsu Higher Education Institutions, Yangzhou, 225009, China
| | - Samir El Qaidi
- College of Veterinary Medicine, Kansas State University, Manhattan, KS, 66506, USA
| | - Philip R Hardwidge
- College of Veterinary Medicine, Kansas State University, Manhattan, KS, 66506, USA
| | - Jinlin Huang
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, China.
- Jiangsu Key Lab of Zoonosis, Yangzhou University, Yangzhou, 225009, Jiangsu, China.
- College of Bioscience and Biotechnology, Yangzhou University, 12 East Wenhui Road Yangzhou, Jiangsu, 225009, China.
| | - Guoqiang Zhu
- College of Veterinary Medicine, Yangzhou University, 12 East Wenhui Road, Yangzhou, 225009, Jiangsu, China.
- Jiangsu Co-Innovation Center for Prevention and Control of Important Animal Infectious Diseases and Zoonoses, Yangzhou, 225009, China.
- Joint Laboratory of International Cooperation On Prevention and Control Technology of Important Animal Diseases and Zoonoses of Jiangsu Higher Education Institutions, Yangzhou, 225009, China.
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Liu J, Tian C, Qiao J, Deng K, Ye X, Xiong L. m6A Methylation-Mediated Stabilization of LINC01106 Suppresses Bladder Cancer Progression by Regulating the miR-3148/DAB1 Axis. Biomedicines 2024; 12:114. [PMID: 38255219 PMCID: PMC10813768 DOI: 10.3390/biomedicines12010114] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2023] [Revised: 12/17/2023] [Accepted: 12/29/2023] [Indexed: 01/24/2024] Open
Abstract
BACKGROUND The pivotal roles of long noncoding RNAs (lncRNAs) in the realm of cancer biology, inclusive of bladder cancer (BCa), have been substantiated through various studies. Remarkably, RNA methylation, especially m6A modification, has demonstrated its influence on both coding and noncoding RNAs. Nonetheless, the explicit impact of RNA methylation on lncRNAs and its subsequent contribution to the progression of BCa remains to be elucidated. METHODS In the present investigation, we scrutinized the expression and m6A methylation status of LINC01106, employing quantitative real-time PCR (qRT-PCR) and methylated RNA immunoprecipitation (MeRIP)-qPCR. To decipher the regulatory mechanism underpinning LINC01106, we utilized RNA immunoprecipitation (RIP)-qPCR, methylated RNA immunoprecipitation (MeRIP) assays, and bioinformatic analysis. Furthermore, the CRISPR/dCas13b-METTL3-METTL14 system was implemented to probe the function of LINC01106. RESULTS The findings of our study indicated that LINC01106 is under expressed and exhibits diminished m6A methylation levels in BCa tissues when compared those of normal controls. A diminished expression of LINC01106 was associated with a less favorable prognosis in BCa patients. Intriguingly, CRISPR-mediated hypermethylation of LINC01106, facilitated by dCas13b-M3-M14, abolished the malignant phenotype of the BCa cells, an effect that could be inverted by Disabled-1 (DAB1) knockdown. From a mechanistic standpoint, we identified an m6A modification site on LINC01106 and highlighted YTHDC1 as a potential reader protein implicated in this process. Additionally, a positive correlation between DAB1 and LINC01106 expression was observed, with miR-3148 potentially acting as a mediator in this relationship. CONCLUSIONS In summary, our research unveils a suppressive regulatory role of the LINC01106/miR-3148/DAB1 axis in the progression of BCa and underscores the YTHDC1-mediated m6A modification mechanism in regards to LINC01106. These revelations propose a new therapeutic target for the management of BCa.
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Affiliation(s)
- Jun Liu
- Department of Urology, Peking University People’s Hospital, Beijing 100034, China; (J.L.); (C.T.)
| | - Cong Tian
- Department of Urology, Peking University People’s Hospital, Beijing 100034, China; (J.L.); (C.T.)
| | - Jiajia Qiao
- Department of Urology, Peking University People’s Hospital, Beijing 100034, China; (J.L.); (C.T.)
| | - Keming Deng
- The Second Clinical Medical College, Lanzhou University, Lanzhou 730000, China;
| | - Xiongjun Ye
- Department of Urology, National Cancer Center/National Clinical Research Center for Cancer/Cancer Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100021, China
| | - Liulin Xiong
- Department of Urology, Peking University People’s Hospital, Beijing 100034, China; (J.L.); (C.T.)
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Yao C, Zeng L, Liu Q, Qiu X, Chen C. LncRNA FAM225B Regulates PDIA4-Mediated Ovarian Cancer Cell Invasion and Migration via Modulating Transcription Factor DDX17. Breast J 2023; 2023:3970444. [PMID: 37720188 PMCID: PMC10501846 DOI: 10.1155/2023/3970444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2023] [Revised: 07/11/2023] [Accepted: 08/21/2023] [Indexed: 09/19/2023]
Abstract
Objective This study aimed to explore the roles and mechanisms of lncRNA FAM225B and PDIA4 in ovarian cancer. Methods RT-qPCR and Western blot assays were performed to detect the expression levels of the lncRNAs FAM225B, DDX17, and PDIA4 in the serum of patients with ovarian cancer and cell lines. Cells were transfected with lncRNA FAM225B- and PDIA4-related vectors to determine the malignant phenotypes using functional experiments. The mutual binding of lncRNA FAM225B and DDX17 was verified using RNA pull-down and RIP assays. Results The expression of lncRNAs FAM225B and PDIA4 was decreased in the serum of patients with ovarian cancer and cell lines. Restoration of lncRNA FAM225B or PDIA4 reduced cell proliferation, migration, and invasion abilities and elevated the apoptosis rate, whereas suppression of lncRNA FAM225B or PDIA4 exhibited an inverse trend. RNA pull-down and RIP assays revealed a direct interaction between lncRNA FAM225B and DDX17. ChIP assay revealed a relationship between DDX17 and the PDIA4 promoter. LncRNA FAM225B and DDX17 positively regulate PDIA4 expression. Downregulation of PDIA4 expression counteracts the suppressive effect of lncRNA FAM225B overexpression in ovarian cancer cells. Conclusion This research study supports the fact that lncRNA FAM225B in ovarian cancer can upregulate PDIA4 by directly binding to DDX17, inhibiting the activities of ovarian cancer cells.
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Affiliation(s)
- Chanjiao Yao
- No. 2 Obstetrics and Gynecology Department, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha, China
| | - Lingjuan Zeng
- No. 2 Obstetrics and Gynecology Department, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha, China
| | - Qin Liu
- No. 2 Obstetrics and Gynecology Department, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha, China
| | - Xiaoxin Qiu
- Obstetrics and Gynecology Department, Hunan Provincial People's Hospital Xingsha Branch (People's Hospital of Changsha County), Changsha, China
| | - Chunyan Chen
- No. 2 Obstetrics and Gynecology Department, Hunan Provincial People's Hospital (The First Affiliated Hospital of Hunan Normal University), Changsha, China
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Ma Y, Wang N, Yang S. Skin cutaneous melanoma properties of immune-related lncRNAs identifying potential prognostic biomarkers. Aging (Albany NY) 2022; 14:3030-3048. [PMID: 35361740 PMCID: PMC9037265 DOI: 10.18632/aging.203982] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2021] [Accepted: 03/09/2022] [Indexed: 11/25/2022]
Abstract
Skin cutaneous melanoma (SKCM) is one of the most aggressive and life-threatening cancers with high incidence rate, metastasis rate and mortality. Early detection and stratification of risk assessment are essential to treat SKCM and to improve survival rate. The aim of this study is to construct an immune-related lncRNAs (immlncRNAs) prognosis risk model to identify immune biomarkers for early diagnosis, prognosis assessment and target immunotherapy of SKCM. For this purpose, we identified 46 immlncRNAs significantly correlated with SKCM prognosis to construct the prognostic risk model and patients were stratified into the high- and low-risk subgroups according to the developed model. The predictive efficiency of this model has been proved by K-M survival analysis and receiver operating characteristic curve. Moreover, CIBERSORT algorithms confirmed that there were differences in immune cell infiltration between the high- and low-risk groups. Functional enrichment analysis further indicated that immlncRNAs were related to a variety of immune response process signaling pathways, suggesting that relevant immlncRNAs could play an important role in the immune regulation of SKCM. Finally, subgroup analysis and multiple Cox regression analysis further proved the stability of the model. In summary, we successfully constructed a 46 immlncRNA-related prognostic risk score model with excellent predictive efficacy and provided more possibilities to investigate the immune regulation mechanisms and to develop immunotherapy of SKCM.
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Affiliation(s)
- Yutong Ma
- Department of Breast Surgery, The First Hospital of China Medical University, Shenyang 110001, Liaoning Province, P.R. China
| | - Ning Wang
- Department of Plastic Surgery, The First Hospital of China Medical University, Shenyang 110001, Liaoning Province, P.R. China
| | - Shude Yang
- Department of Plastic Surgery, The First Hospital of China Medical University, Shenyang 110001, Liaoning Province, P.R. China
- Liaoning Provincial Key Laboratory of Oral Diseases, School of Stomatology, China Medical University, Shenyang 110001, Liaoning Province, P.R. China
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Stasiak M, Kolenda T, Kozłowska-Masłoń J, Sobocińska J, Poter P, Guglas K, Paszkowska A, Bliźniak R, Teresiak A, Kazimierczak U, Lamperska K. The World of Pseudogenes: New Diagnostic and Therapeutic Targets in Cancers or Still Mystery Molecules? Life (Basel) 2021; 11:life11121354. [PMID: 34947885 PMCID: PMC8705536 DOI: 10.3390/life11121354] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2021] [Revised: 12/01/2021] [Accepted: 12/02/2021] [Indexed: 02/07/2023] Open
Abstract
Pseudogenes were once considered as “junk DNA”, due to loss of their functions as a result of the accumulation of mutations, such as frameshift and presence of premature stop-codons and relocation of genes to inactive heterochromatin regions of the genome. Pseudogenes are divided into two large groups, processed and unprocessed, according to their primary structure and origin. Only 10% of all pseudogenes are transcribed into RNAs and participate in the regulation of parental gene expression at both transcriptional and translational levels through senseRNA (sRNA) and antisense RNA (asRNA). In this review, about 150 pseudogenes in the different types of cancers were analyzed. Part of these pseudogenes seem to be useful in molecular diagnostics and can be detected in various types of biological material including tissue as well as biological fluids (liquid biopsy) using different detection methods. The number of pseudogenes, as well as their function in the human genome, is still unknown. However, thanks to the development of various technologies and bioinformatic tools, it was revealed so far that pseudogenes are involved in the development and progression of certain diseases, especially in cancer.
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Affiliation(s)
- Maciej Stasiak
- Greater Poland Cancer Centre, Laboratory of Cancer Genetics, Garbary 15, 61-866 Poznan, Poland; (M.S.); (J.K.-M.); (J.S.); (K.G.); (A.P.); (R.B.); (A.T.)
- Greater Poland Cancer Centre, Research and Implementation Unit, Garbary 15, 61-866 Poznan, Poland;
| | - Tomasz Kolenda
- Greater Poland Cancer Centre, Laboratory of Cancer Genetics, Garbary 15, 61-866 Poznan, Poland; (M.S.); (J.K.-M.); (J.S.); (K.G.); (A.P.); (R.B.); (A.T.)
- Greater Poland Cancer Centre, Research and Implementation Unit, Garbary 15, 61-866 Poznan, Poland;
- Correspondence: or (T.K.); or (K.L.)
| | - Joanna Kozłowska-Masłoń
- Greater Poland Cancer Centre, Laboratory of Cancer Genetics, Garbary 15, 61-866 Poznan, Poland; (M.S.); (J.K.-M.); (J.S.); (K.G.); (A.P.); (R.B.); (A.T.)
- Greater Poland Cancer Centre, Research and Implementation Unit, Garbary 15, 61-866 Poznan, Poland;
- Faculty of Biology, Institute of Human Biology and Evolution, Adam Mickiewicz University, Uniwersytetu Poznańskiego 6, 61-614 Poznań, Poland
| | - Joanna Sobocińska
- Greater Poland Cancer Centre, Laboratory of Cancer Genetics, Garbary 15, 61-866 Poznan, Poland; (M.S.); (J.K.-M.); (J.S.); (K.G.); (A.P.); (R.B.); (A.T.)
- Greater Poland Cancer Centre, Research and Implementation Unit, Garbary 15, 61-866 Poznan, Poland;
| | - Paulina Poter
- Greater Poland Cancer Centre, Research and Implementation Unit, Garbary 15, 61-866 Poznan, Poland;
- Greater Poland Cancer Center, Department of Oncologic Pathology and Prophylaxis, Poznan University of Medical Sciences, Garbary 15, 61-866 Poznan, Poland
- Department of Pathology, Pomeranian Medical University, Rybacka 1, 70-204 Szczecin, Poland
| | - Kacper Guglas
- Greater Poland Cancer Centre, Laboratory of Cancer Genetics, Garbary 15, 61-866 Poznan, Poland; (M.S.); (J.K.-M.); (J.S.); (K.G.); (A.P.); (R.B.); (A.T.)
- Greater Poland Cancer Centre, Research and Implementation Unit, Garbary 15, 61-866 Poznan, Poland;
- Postgraduate School of Molecular Medicine, Medical University of Warsaw, 61 Zwirki and Wigury, 02-091 Warsaw, Poland
| | - Anna Paszkowska
- Greater Poland Cancer Centre, Laboratory of Cancer Genetics, Garbary 15, 61-866 Poznan, Poland; (M.S.); (J.K.-M.); (J.S.); (K.G.); (A.P.); (R.B.); (A.T.)
- Greater Poland Cancer Centre, Research and Implementation Unit, Garbary 15, 61-866 Poznan, Poland;
- Faculty of Biology, Adam Mickiewicz University, Umultowska 89, 61-614 Poznan, Poland
| | - Renata Bliźniak
- Greater Poland Cancer Centre, Laboratory of Cancer Genetics, Garbary 15, 61-866 Poznan, Poland; (M.S.); (J.K.-M.); (J.S.); (K.G.); (A.P.); (R.B.); (A.T.)
- Greater Poland Cancer Centre, Research and Implementation Unit, Garbary 15, 61-866 Poznan, Poland;
| | - Anna Teresiak
- Greater Poland Cancer Centre, Laboratory of Cancer Genetics, Garbary 15, 61-866 Poznan, Poland; (M.S.); (J.K.-M.); (J.S.); (K.G.); (A.P.); (R.B.); (A.T.)
- Greater Poland Cancer Centre, Research and Implementation Unit, Garbary 15, 61-866 Poznan, Poland;
| | - Urszula Kazimierczak
- Department of Cancer Immunology, Medical Biotechnology, Poznan University of Medical Sciences, 8 Rokietnicka Street, 60-806 Poznan, Poland;
| | - Katarzyna Lamperska
- Greater Poland Cancer Centre, Laboratory of Cancer Genetics, Garbary 15, 61-866 Poznan, Poland; (M.S.); (J.K.-M.); (J.S.); (K.G.); (A.P.); (R.B.); (A.T.)
- Greater Poland Cancer Centre, Research and Implementation Unit, Garbary 15, 61-866 Poznan, Poland;
- Correspondence: or (T.K.); or (K.L.)
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Li N, Zhang H, Hu K, Chu J. A novel long non-coding RNA-based prognostic signature for renal cell carcinoma patients with stage IV and histological grade G4. Bioengineered 2021; 12:6275-6285. [PMID: 34499010 PMCID: PMC8806408 DOI: 10.1080/21655979.2021.1971022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Revised: 08/17/2021] [Accepted: 08/17/2021] [Indexed: 11/02/2022] Open
Abstract
This study aimed to establish a lncRNA-based signature for predicting the prognosis of patients with high stage and grade renal cell carcinoma (RCC). According to the Surveillance, Epidemiology, and End Results (SEER) database, sex, age, grade, stage, surgery, chemotherapy, radiation, tumor size, and marital status were the independent prognostic factors for RCC and also had significant correlations with the overall survival through Cox univariate and multivariate analyses. Noticeably, among these influencing factors, the histological classification of undifferentiated group and pathological stage IV had the greatest prognostic risks for RCC patients. Furthermore, based on the samples at stage IV and histological grade G4 from The Cancer Genome Atlas (TCGA) portal, 9 key lncRNAs, including KIAA2012, CCNT2-AS1, ITPKB-AS1, TBX2-AS1, NUTM2A-AS1, LINC02522, LINC02384, LINC01559, and LINC00865 were identified and a prognostic signature was constructed by Lasso analysis and Cox regression model. The Kaplan-Meier analysis suggested that patients at stage IV and histological grade of G4 in high risk score group had a worse overall survival than that in low risk score group. The following receiver operating characteristic curve (ROC) curves also showed that this signature possesses a better predictive power performance. Pathway enrichment analysis discovered that 9 lncRNAs held potential roles in cell division, cell cycle, DNA damage and cytokines levels in RCC. This work indicates that the established 9-lncRNA signature has a good capacity in predicting the prognosis of RCC patients with stage IV and histological grade of G4, and may be helpful for guiding the treatment strategies for RCC patients.
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Affiliation(s)
- Ning Li
- Department of Urology, Yantaishan Hospital, Yantai, Shandong , P.R. China
| | - Haiying Zhang
- Department of Urology, Yantaishan Hospital, Yantai, Shandong , P.R. China
| | - Keyao Hu
- Department of Urology, Yantaishan Hospital, Yantai, Shandong , P.R. China
| | - Jianfeng Chu
- Department of Urology, Yantaishan Hospital, Yantai, Shandong , P.R. China
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Zhou X, Zeng B, Li Y, Wang H, Zhang X. LINC02532 Contributes to Radiosensitivity in Clear Cell Renal Cell Carcinoma through the miR-654-5p/YY1 Axis. Molecules 2021; 26:molecules26227040. [PMID: 34834139 PMCID: PMC8625588 DOI: 10.3390/molecules26227040] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2021] [Revised: 11/10/2021] [Accepted: 11/12/2021] [Indexed: 01/04/2023] Open
Abstract
Background: Studies have shown that long non-coding RNAs (lncRNAs) play essential roles in tumor progression and can affect the response to radiotherapy, including in clear cell renal cell carcinoma (ccRCC). LINC02532 has been found to be upregulated in ccRCC. However, not much is known about this lncRNA. Hence, this study aimed to investigate the role of LINC02532 in ccRCC, especially in terms of radioresistance. Methods: Quantitative real-time PCR was used to detect the expression of LINC02532, miR-654-5p, and YY1 in ccRCC cells. Protein levels of YY1, cleaved PARP, and cleaved-Caspase-3 were detected by Western blotting. Cell survival fractions, viability, and apoptosis were determined by clonogenic survival assays, CCK-8 assays, and flow cytometry, respectively. The interplay among LINC02532, miR-654-5p, and YY1 was detected by chromatin immunoprecipitation and dual-luciferase reporter assays. In addition, in vivo xenograft models were established to investigate the effect of LINC02532 on ccRCC radioresistance in 10 nude mice. Results: LINC02532 was highly expressed in ccRCC cells and was upregulated in the cells after irradiation. Moreover, LINC02532 knockdown enhanced cell radiosensitivity both in vitro and in vivo. Furthermore, YY1 activated LINC02532 in ccRCC cells, and LINC02532 acted as a competing endogenous RNA that sponged miR-654-5p to regulate YY1 expression. Rescue experiments indicated that miR-654-5p overexpression or YY1 inhibition recovered ccRCC cell functions that had been previously impaired by LINC02532 overexpression. Conclusions: Our results revealed a positive feedback loop of LINC02532/miR-654-5p/YY1 in regulating the radiosensitivity of ccRCC, suggesting that LINC02532 might be a potential target for ccRCC radiotherapy. This study could serve as a foundation for further research on the role of LINC02532 in ccRCC and other cancers.
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Affiliation(s)
- Xiaoguang Zhou
- Department of Urology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China; (X.Z.); (B.Z.); (Y.L.); (H.W.)
| | - Bowen Zeng
- Department of Urology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China; (X.Z.); (B.Z.); (Y.L.); (H.W.)
- Department of Urology, Affiliated Hospital of Sergeant School of Army Medical University, Shijiazhuang 050044, China
| | - Yansheng Li
- Department of Urology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China; (X.Z.); (B.Z.); (Y.L.); (H.W.)
| | - Haozhou Wang
- Department of Urology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China; (X.Z.); (B.Z.); (Y.L.); (H.W.)
| | - Xiaodong Zhang
- Department of Urology, Beijing Chaoyang Hospital, Capital Medical University, Beijing 100020, China; (X.Z.); (B.Z.); (Y.L.); (H.W.)
- Correspondence: ; Tel.: +86-010-85231247
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Naik A, Dalpatraj N, Thakur N. Global Histone H3 Lysine 4 Trimethylation (H3K4me3) Landscape Changes in Response to TGFβ. Epigenet Insights 2021; 14:25168657211051755. [PMID: 34671716 PMCID: PMC8521735 DOI: 10.1177/25168657211051755] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2021] [Accepted: 09/21/2021] [Indexed: 01/12/2023] Open
Abstract
TGFβ expression acts as a biomarker of poor prognosis in prostate cancer. It plays a dual functional role in prostate cancer. In the early stages of the tumor, it acts as a tumor suppressor while at the later stages of tumor development, it promotes metastasis. The molecular mechanisms of action of TGFβ are largely understood through the canonical and non-canonical signal transduction pathways. Our understanding of the mechanisms that establish transient TGFβ stimulation into stable gene expression patterns remains incomplete. Epigenetic marks like histone H3 modifications are directly linked with gene expression and they play an important role in tumorigenesis. In this report, we performed chromatin immunoprecipitation-sequencing (ChIP-Seq) to identify the genome-wide regions that undergo changes in histone H3 Lysine 4 trimethylation (H3K4me3) occupancy in response to TGFβ stimulation. We also show that TGFβ stimulation can induce acute epigenetic changes through the modulation of H3K4me3 signals at genes belonging to special functional categories in prostate cancer. TGFβ induces the H3K4me3 on its own ligands like TGFβ, GDF1, INHBB, GDF3, GDF6, BMP5 suggesting a positive feedback loop. The majority of genes were found to be involved in the positive regulation of transcription from the RNA polymerase II promoter in response to TGFβ. Other functional categories were intracellular protein transport, brain development, EMT, angiogenesis, antigen processing, antigen presentation via MHC class II, lipid transport, embryo development, histone H4 acetylation, positive regulation of cell cycle arrest, and genes involved in mitotic G2 DNA damage checkpoints. Our results link TGFβ stimulation to acute changes in gene expression through an epigenetic mechanism. These findings have broader implications on epigenetic bases of acute gene expression changes caused by growth factor stimulation.
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Affiliation(s)
- Ankit Naik
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Navrangpura, Ahmedabad, Gujarat, India
| | - Nidhi Dalpatraj
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Navrangpura, Ahmedabad, Gujarat, India
| | - Noopur Thakur
- Biological and Life Sciences, School of Arts and Sciences, Ahmedabad University, Navrangpura, Ahmedabad, Gujarat, India
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Carron J, Della Coletta R, Lourenço GJ. Pseudogene Transcripts in Head and Neck Cancer: Literature Review and In Silico Analysis. Genes (Basel) 2021; 12:genes12081254. [PMID: 34440428 PMCID: PMC8391979 DOI: 10.3390/genes12081254] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2021] [Revised: 08/10/2021] [Accepted: 08/12/2021] [Indexed: 12/25/2022] Open
Abstract
Once considered nonfunctional, pseudogene transcripts are now known to provide valuable information for cancer susceptibility, including head and neck cancer (HNC), a serious health problem worldwide, with about 50% unimproved overall survival over the last decades. The present review focuses on the role of pseudogene transcripts involved in HNC risk and prognosis. We combined current literature and in silico analyses from The Cancer Genome Atlas (TCGA) database to identify the most deregulated pseudogene transcripts in HNC and their genetic variations. We then built a co-expression network and performed gene ontology enrichment analysis to better understand the pseudogenes’ interactions and pathways in HNC. In the literature, few pseudogenes have been studied in HNC. Our in silico analysis identified 370 pseudogene transcripts associated with HNC, where SPATA31D5P, HERC2P3, SPATA31C2, MAGEB6P1, SLC25A51P1, BAGE2, DNM1P47, SPATA31C1, ZNF733P and OR2W5 were found to be the most deregulated and presented several genetic alterations. NBPF25P, HSP90AB2P, ZNF658B and DPY19L2P3 pseudogenes were predicted to interact with 12 genes known to participate in HNC, DNM1P47 was predicted to interact with the TP53 gene, and HLA-H pseudogene was predicted to interact with HLA-A and HLA-B genes. The identified pseudogenes were associated with cancer biology pathways involving cell communication, response to stress, cell death, regulation of the immune system, regulation of gene expression, and Wnt signaling. Finally, we assessed the prognostic values of the pseudogenes with the Kaplan–Meier Plotter database, and found that expression of SPATA31D5P, SPATA31C2, BAGE2, SPATA31C1, ZNF733P and OR2W5 pseudogenes were associated with patients’ survival. Due to pseudogene transcripts’ potential for cancer diagnosis, progression, and as therapeutic targets, our study can guide new research to HNC understanding and development of new target therapies.
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Affiliation(s)
- Juliana Carron
- Laboratory of Cancer Genetics, School of Medical Sciences, University of Campinas, Campinas 13083-888, São Paulo, Brazil;
| | - Rafael Della Coletta
- Department of Agronomy and Plant Genetics, University of Minnesota, Saint Paul, MN 55108, USA;
| | - Gustavo Jacob Lourenço
- Laboratory of Cancer Genetics, School of Medical Sciences, University of Campinas, Campinas 13083-888, São Paulo, Brazil;
- Correspondence: ; Tel.: +55-19-3521-9120
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10
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Lee J, Hwang JH, Chun H, Woo W, Oh S, Choi J, Kim LK. PLEKHA8P1 Promotes Tumor Progression and Indicates Poor Prognosis of Liver Cancer. Int J Mol Sci 2021; 22:7614. [PMID: 34299245 PMCID: PMC8304620 DOI: 10.3390/ijms22147614] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2021] [Revised: 07/11/2021] [Accepted: 07/14/2021] [Indexed: 02/08/2023] Open
Abstract
Hepatocellular carcinoma (HCC) records the second-lowest 5-year survival rate despite the avalanche of research into diagnosis and therapy. One of the major obstacles in treatment is chemoresistance to drugs such as 5-fluorouracil (5-FU), making identification and elucidation of chemoresistance regulators highly valuable. As the regulatory landscape grows to encompass non-coding genes such as long non-coding RNAs (lncRNAs), a relatively new class of lncRNA has emerged in the form of pseudogene-derived lncRNAs. Through bioinformatics analyses of the TCGA LIHC dataset, we have systematically identified pseudogenes of prognostic value. Initial experimental validation of selected pseudogene-derived lncRNA (PLEKHA8P1) and its parental gene (PLEKHA8), a well-studied transport protein in Golgi complex recently implicated as an oncogene in both colorectal and liver cancer, indicates that the pseudogene/parental gene pair promotes tumor progression and that their dysregulated expression levels affect 5-FU-induced chemoresistance in human HCC cell line FT3-7. Our study has thus confirmed cancer-related functions of PLEKHA8, and laid the groundwork for identification and validation of oncogenic pseudogene-derived lncRNA that shows potential as a novel therapeutic target in circumventing chemoresistance induced by 5-FU.
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MESH Headings
- Adaptor Proteins, Signal Transducing/genetics
- Adaptor Proteins, Signal Transducing/metabolism
- Biomarkers, Tumor/metabolism
- Carcinoma, Hepatocellular/genetics
- Carcinoma, Hepatocellular/metabolism
- Cell Line, Tumor
- Computational Biology/methods
- Databases, Genetic
- Disease Progression
- Drug Resistance, Neoplasm/genetics
- Fluorouracil/pharmacology
- Gene Expression Profiling/methods
- Gene Expression Regulation, Neoplastic/genetics
- Humans
- Kaplan-Meier Estimate
- Liver Neoplasms/genetics
- Liver Neoplasms/metabolism
- MicroRNAs/genetics
- Prognosis
- Pseudogenes
- RNA, Long Noncoding/genetics
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Affiliation(s)
- Jiyeon Lee
- Severance Biomedical Science Institute, Graduate School of Medical Science, Brain Korea 21 Project, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, Korea; (J.L.); (W.W.)
| | - Ji-Hyun Hwang
- Interdisciplinary Program of Integrated OMICS for Biomedical Science, The Graduate School, Yonsei University, Seoul 03722, Korea;
| | - Harim Chun
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul 02841, Korea;
| | - Wonjin Woo
- Severance Biomedical Science Institute, Graduate School of Medical Science, Brain Korea 21 Project, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, Korea; (J.L.); (W.W.)
| | - Sekyung Oh
- Department of Medical Science, Catholic Kwandong University College of Medicine, Incheon 22711, Korea;
| | - Jungmin Choi
- Department of Biomedical Sciences, Korea University College of Medicine, Seoul 02841, Korea;
| | - Lark Kyun Kim
- Severance Biomedical Science Institute, Graduate School of Medical Science, Brain Korea 21 Project, Gangnam Severance Hospital, Yonsei University College of Medicine, Seoul 06273, Korea; (J.L.); (W.W.)
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11
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Dong S, Fu Y, Yang K, Zhang X, Miao R, Long Y, Liu C. Linc01559 Served as a Potential Oncogene and Promoted Resistance of Hepatocellular Carcinoma to Oxaliplatin by Directly Sponging miR-6783-3p. Anticancer Agents Med Chem 2021; 21:278-286. [PMID: 32698745 DOI: 10.2174/1871520620666200721122317] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2020] [Revised: 04/21/2020] [Accepted: 05/10/2020] [Indexed: 12/24/2022]
Abstract
BACKGROUND Oxaliplatin (L-OHP)-based chemotherapy, such as FOLFOX4 (5-fluorouracil, leucovorin, and L-OHP), improves the prognosis of patients with late-stage Hepatocellular Carcinoma (HCC). However, the development of resistance to L-OHP leads to the failure of chemotherapy. The aim of this study was to investigate the role of linc01559 and miR-6783-3p in regulating resistance to L-OHP. METHODS Quantitative reverse transcription-polymerase chain reaction was used to determine the expression profile. The Cell Counting Kit-8 test and wound healing assay were also used. Dual-luciferase reporter gene assay, RNA pull-down assay, and RNA immunoprecipitation were used to evaluate the interaction between linc01559 and miR-6783-3p. RESULT linc01559 expression was associated with response to FOLFOX4, as well as miR-1343-3p and miR- 6783-3p expression in vivo. A nomogram, including linc01559 and miR-1343-3p, precisely and accurately predicted the overall survival of patients with HCC. Regarding the in vitro tests, linc01559 showed higher expression in L-OHP-resistant cell lines, whereas miR-6783-3p was downregulated. Knockdown of linc01559 led to decreased proliferation and migration ability, and increased expression of miR-6783-3p; however, it did not influence the expression of miR-1343-3p. We also found that linc01559 directly interacted with miR-6783-3p. Furthermore, linc01559 and miR-6783-3p regulated the viability of L-OHP-resistant cells following treatment with L-OHP. CONCLUSION linc01559 promoted the proliferation of HCC by sponging miR-6783-3p. This suggests that linc01559/miR-6783-3p may be key factors in regulating resistance and response to L-OHP. Moreover, they may be potential therapeutic targets for improving sensitivity to L-OHP in patients with HCC.
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Affiliation(s)
- Shunbin Dong
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Ying Fu
- Department of Oncology, Liaocheng People's Hospital, Liaocheng, 252000, Shandong Province, China
| | - Kaibo Yang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Xing Zhang
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Runchen Miao
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Yunxiang Long
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
| | - Chang Liu
- Department of Hepatobiliary Surgery, The First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, Shaanxi, China
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12
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Huang C, Zhao J, Zhu Z. Prognostic Nomogram of Prognosis-Related Genes and Clinicopathological Characteristics to Predict the 5-Year Survival Rate of Colon Cancer Patients. Front Surg 2021; 8:681721. [PMID: 34222322 PMCID: PMC8242155 DOI: 10.3389/fsurg.2021.681721] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2021] [Accepted: 05/13/2021] [Indexed: 12/18/2022] Open
Abstract
Background: The Cancer Genome Atlas (TCGA) has established a genome-wide gene expression profile, increasing our understanding of the impact of tumor heredity on clinical outcomes. The aim of this study was to construct a nomogram using data from the TCGA regarding prognosis-related genes and clinicopathological characteristics to predict the 5-years survival rate of colon cancer (CC) patients. Methods: Kaplan-Meier and Cox regression analyses were used to identify genes associated with the 5-years survival rate of CC patients. Cox regression was used to analyze the relationship between the clinicopathological features and prognostic genes and overall survival rates in patients with CC and to identify independent risk factors for the prognosis of CC patients. A nomogram for predicting the 5-years survival rate of CC patients was constructed by R software. Results: A total of eight genes (KCNJ14, CILP2, ATP6V1G2, GABRD, RIMKLB, SIX2, PLEKHA8P1, and MPP2) related to the 5-years survival of rate CC patients were identified. Age, stage, and PLEKHA8P1 were independent risk factors for the 5-years survival rate in patients with CC. The accuracy, sensitivity and specificity of the nomogram model constructed by age, TNM staging, and PLEKHA8P1 for predicting the 5-years survival of rate CC patients were 83.3, 83.97, and 85.79%, respectively. Conclusion: The nomogram can correctly predict the 5-year survival rate of patients with CC, thus aiding the individualized decision-making process for patients with CC.
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Affiliation(s)
- Chao Huang
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Jiefeng Zhao
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
| | - Zhengming Zhu
- Department of Gastrointestinal Surgery, The Second Affiliated Hospital of Nanchang University, Nanchang, China
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13
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Byun S, Affolter KE, Snow AK, Curtin K, Cannon AR, Cannon-Albright LA, Thota R, Neklason DW. Differential methylation of G-protein coupled receptor signaling genes in gastrointestinal neuroendocrine tumors. Sci Rep 2021; 11:12303. [PMID: 34112938 PMCID: PMC8192774 DOI: 10.1038/s41598-021-91934-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2021] [Accepted: 05/24/2021] [Indexed: 12/11/2022] Open
Abstract
Neuroendocrine tumors (NETs) of the small intestine undergo large chromosomal and methylation changes. The objective of this study was to identify methylation differences in NETs and consider how the differentially methylated genes may impact patient survival. Genome-wide methylation and chromosomal copy number variation (CNV) of NETs from the small intestine and appendix were measured. Tumors were divided into three molecular subtypes according to CNV results: chromosome 18 loss (18LOH), Multiple CNV, and No CNV. Comparison of 18LOH tumors with MultiCNV and NoCNV tumors identified 901 differentially methylated genes. Genes from the G-protein coupled receptor (GPCR) pathways are statistically overrepresented in the differentially methylated genes. One of the highlighted genes from the GPCR pathway is somatostatin (SST), a clinical target for NETs. Patient survival based on low versus high methylation in all samples identified four significant genes (p < 0.05) OR2S2, SMILR, RNU6-653P, and AC010543.1. Within the 18LOH molecular subtype tumors, survival differences were identified in high versus low methylation of 24 genes. The most significant is TRHR (p < 0.01), a GPCR with multiple FDA-approved drugs. By separating NETs into different molecular subtypes based on chromosomal changes, we find that multiple GPCRs and their ligands appear to be regulated through methylation and correlated with survival. These results suggest opportunities for better treatment strategies for NETs based on molecular features.
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Affiliation(s)
- Seyoun Byun
- Huntsman Cancer Institute, University of Utah, 2000 Circle of Hope, Salt Lake City, UT, 84112-5550, USA
- Department of Biomedical Informatics, University of Utah School of Medicine, Salt Lake City, USA
| | - Kajsa E Affolter
- Huntsman Cancer Institute, University of Utah, 2000 Circle of Hope, Salt Lake City, UT, 84112-5550, USA
- Department of Pathology, University of Utah, Salt Lake City, USA
| | - Angela K Snow
- Huntsman Cancer Institute, University of Utah, 2000 Circle of Hope, Salt Lake City, UT, 84112-5550, USA
| | - Karen Curtin
- Huntsman Cancer Institute, University of Utah, 2000 Circle of Hope, Salt Lake City, UT, 84112-5550, USA
- Division of Epidemiology, Department of Internal Medicine, University of Utah, Salt Lake City, USA
| | - Austin R Cannon
- Division of General Surgery, Department of Surgery, University of Utah School of Medicine, Salt Lake City, USA
| | - Lisa A Cannon-Albright
- Huntsman Cancer Institute, University of Utah, 2000 Circle of Hope, Salt Lake City, UT, 84112-5550, USA
- Division of Epidemiology, Department of Internal Medicine, University of Utah, Salt Lake City, USA
| | - Ramya Thota
- Medical Oncology, Intermountain Healthcare, Salt Lake City, USA
| | - Deborah W Neklason
- Huntsman Cancer Institute, University of Utah, 2000 Circle of Hope, Salt Lake City, UT, 84112-5550, USA.
- Division of Epidemiology, Department of Internal Medicine, University of Utah, Salt Lake City, USA.
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14
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Weighted Gene Coexpression Network Analysis to Construct Competitive Endogenous RNA Network in Chromogenic Renal Cell Carcinoma. BIOMED RESEARCH INTERNATIONAL 2021; 2021:5589101. [PMID: 34222474 PMCID: PMC8213485 DOI: 10.1155/2021/5589101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Accepted: 05/24/2021] [Indexed: 12/02/2022]
Abstract
Aim This study is aimed at constructing the competing endogenous RNA (ceRNA) network in chromophobe renal cell carcinoma (ChRCC). Methods Clinical and RNA sequence profiles of patients with ChRCC, including messenger RNAs (mRNAs), microRNAs (miRNAs), and long noncoding RNAs (lncRNAs), were obtained from The Cancer Genome Atlas (TCGA) database. “edgeR” and “clusterProfiler” packages were utilized to obtain the expression matrices of differential RNAs (DERNAs) and to conduct gene ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) analyses. Weighted gene coexpression network analysis (WGCNA) was performed to screen the highly related RNAs, and miRcode, StarBase, miRTarBase, miRDB, and TargetScan datasets were used to predict the connections between them. Univariate and multivariate Cox proportional hazards regressions were performed in turn to elucidate prognosis-related mRNAs in order to construct the ceRNA regulatory network. Results A total of 1628 DElncRNAs, 104 DEmiRNAs, and 2619 DEmRNAs were identified. WGCNA showed significant correlation in 1534 DElncRNAs, 98 DEmiRNAs, and 2543 DEmRNAs, which were related to ChRCC. Fourteen DEmiRNAs, 113 DElncRNAs, and 43 DEmRNAs were screened. Nine mRNAs (ALPL, ARHGAP29, CADM2, KIT, KLRD1, MYBL1, PSD3, SFRP1, and SLC7A11) significantly contributed to the overall survival (OS) of patients with ChRCC (P < 0.05). Furthermore, two mRNAs (CADM2 and SFRP1) appeared to be independent risk factors for ChRCC. Conclusion The findings revealed the molecular mechanism of ChRCC and potential therapeutic targets for the disease.
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15
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Wang JF, Xi ZN, Su HJ, Bao Z, Qiao YH. SP1-induced overexpression of LINC00520 facilitates non-small cell lung cancer progression through miR-577/CCNE2 pathway and predicts poor prognosis. Hum Cell 2021; 34:952-964. [PMID: 33728585 DOI: 10.1007/s13577-021-00518-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Accepted: 03/05/2021] [Indexed: 01/13/2023]
Abstract
Long noncoding RNAs (lncRNAs) have gained much attention in the past few years. Long intergenic non-protein coding RNA 520 (LINC00520) was one of the newly discovered lncRNA which has been demonstrated to be dysregulated in several cancers. So far, the function and mechanism of LINC00520 in non-small cell lung cancer (NSCLC) are unclear. In this paper, our group first showed that LINC00520 level was elevated in non-small cell lung cancer (NSCLC) tissue and cells. In addition, SP1 could bind directly to the promoter region of LINC00520 and thus promote its transcription. Increased LINC00520 was distinctly correlated with advanced tumor stage and shorter survival time in NSCLC patients. Further functional investigations provided evidences that forced down regulation of LINC00520 inhibited NSCLC cell proliferation, invasion, metastasis and EMT, while contributing to cells apoptosis. Mechanistically, we found that LINC00520 serving as a competing endogenous RNA to be involved in the modulation of miR-577 expressions, and thus affected the expression of CCNE2 which was a target gene of miR-577. Moreover, in NSCLC cells with si-LINC00520, up regulation of CCNE2 led to an increase of cell growth and invasion. Taken together, LINC00520 displayed its tumor-promotive roles through modulating the miR-577/CCNE2 axis, highlighting a potential therapeutic strategy for NSCLC patients.
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Affiliation(s)
- Ji-Fang Wang
- Department of Respiration Ward II, Henan Provincial Chest Hospital, Weiwu Road No. 1, Zhengzhou, Henan, China
| | - Zhuo-Na Xi
- Department of Respiration Ward II, Henan Provincial Chest Hospital, Weiwu Road No. 1, Zhengzhou, Henan, China
| | - Hong-Jian Su
- Department of Respiration Ward II, Henan Provincial Chest Hospital, Weiwu Road No. 1, Zhengzhou, Henan, China
| | - Zhen Bao
- Department of Respiration Ward II, Henan Provincial Chest Hospital, Weiwu Road No. 1, Zhengzhou, Henan, China
| | - Ya-Hong Qiao
- Department of Respiration Ward II, Henan Provincial Chest Hospital, Weiwu Road No. 1, Zhengzhou, Henan, China.
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16
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Ciomborowska-Basheer J, Staszak K, Kubiak MR, Makałowska I. Not So Dead Genes-Retrocopies as Regulators of Their Disease-Related Progenitors and Hosts. Cells 2021; 10:cells10040912. [PMID: 33921034 PMCID: PMC8071448 DOI: 10.3390/cells10040912] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2021] [Revised: 03/30/2021] [Accepted: 04/13/2021] [Indexed: 12/12/2022] Open
Abstract
Retroposition is RNA-based gene duplication leading to the creation of single exon nonfunctional copies. Nevertheless, over time, many of these duplicates acquire transcriptional capabilities. In human in most cases, these so-called retrogenes do not code for proteins but function as regulatory long noncoding RNAs (lncRNAs). The mechanisms by which they can regulate other genes include microRNA sponging, modulation of alternative splicing, epigenetic regulation and competition for stabilizing factors, among others. Here, we summarize recent findings related to lncRNAs originating from retrocopies that are involved in human diseases such as cancer and neurodegenerative, mental or cardiovascular disorders. Special attention is given to retrocopies that regulate their progenitors or host genes. Presented evidence from the literature and our bioinformatics analyses demonstrates that these retrocopies, often described as unimportant pseudogenes, are significant players in the cell’s molecular machinery.
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17
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Huang S, Liao Q, Li W, Deng G, Jia M, Fang Q, Ji H, Meng M. The lncRNA PTTG3P promotes the progression of CRPC via upregulating PTTG1. Bull Cancer 2021; 108:359-368. [PMID: 33743960 DOI: 10.1016/j.bulcan.2020.11.022] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 11/25/2020] [Accepted: 11/26/2020] [Indexed: 11/18/2022]
Abstract
BACKGROUND Overexpression of certain long non-coding RNAs (lncRNAs) promotes the progression of castration-resistant prostate cancer (CRPC). The significance and potential role of the lncRNA designated pituitary tumour-transforming 3, pseudogene (PTTG3P) in CRPC is unknown. METHODS We detected PTTG3P expression by qPCR. Upregulated PTTG3P expression was performed to explore the role of PTTG3P in PCa cells resistant to ADT (androgen deprivation therapy). The relationship among PTTG3P, mir-146a-3p and PTTG1 were validated by qPCR, western blot and luciferase assay. RESULTS PTTG3P levels were significantly increased in the androgen-independent PC cell lines, as well as in CRPC tissues compared with those of the androgen-dependent prostate cancer cell line LNCaP and tumour tissues of patients with hormone-naive prostate cancers. Enforced expression of PTTG3P in androgen-deprived LNCaP cells significantly enhanced survival, clonogenicity, and tumorigenicity. Further, PTTG3P acted as a competing endogenous RNA (ceRNA, natural miRNA sponge) to upregulate PTTG1 expression by competing for mir-146a-3p in the progression to CRPC. CONCLUSION Our findings suggest that PTTG3P promotes the resistance of prostate cancer cells to androgen-deprivation therapy via upregulating PTTG1. PTTG3P may therefore represent a potential target for therapy of CRPC.
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MESH Headings
- Adenocarcinoma/genetics
- Adenocarcinoma/pathology
- Androgen Antagonists/therapeutic use
- Anilides/therapeutic use
- Animals
- Antineoplastic Agents, Hormonal/therapeutic use
- Binding, Competitive
- Cell Line, Tumor
- Drug Resistance, Neoplasm
- Heterografts
- Humans
- Male
- Mice, Nude
- MicroRNAs/genetics
- MicroRNAs/metabolism
- Neoplasm Transplantation
- Nitriles/therapeutic use
- Prostatic Neoplasms, Castration-Resistant/genetics
- Prostatic Neoplasms, Castration-Resistant/pathology
- Pseudogenes
- RNA, Long Noncoding/genetics
- RNA, Messenger/genetics
- RNA, Messenger/metabolism
- RNA, Neoplasm/genetics
- RNA, Neoplasm/metabolism
- Securin/biosynthesis
- Securin/genetics
- Tosyl Compounds/therapeutic use
- Tumor Stem Cell Assay
- Up-Regulation
- Mice
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Affiliation(s)
- Shengquan Huang
- Chongqing medical university, The third affiliated hospital (General Hospital), Department of urology, 401120 Chongqing, China
| | - Qianjin Liao
- Chongqing north KuanRen hospital, 400000 Chongqing, China
| | - Weibing Li
- Chongqing medical university, The third affiliated hospital (General Hospital), Department of urology, 401120 Chongqing, China
| | - Guoxian Deng
- Chongqing medical university, The third affiliated hospital (General Hospital), Department of urology, 401120 Chongqing, China
| | - Ming Jia
- Chongqing medical university, The third affiliated hospital (General Hospital), Department of urology, 401120 Chongqing, China
| | - Qiang Fang
- Chongqing medical university, The third affiliated hospital (General Hospital), Department of urology, 401120 Chongqing, China
| | - Huixiang Ji
- Chongqing medical university, The third affiliated hospital (General Hospital), Department of urology, 401120 Chongqing, China.
| | - Mingsen Meng
- Chongqing medical university, The third affiliated hospital (General Hospital), Department of urology, 401120 Chongqing, China.
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Long non-coding RNA 01559 mediates the malignant phenotypes of hepatocellular carcinoma cells through targeting miR-511. Clin Res Hepatol Gastroenterol 2021; 45:101648. [PMID: 33588099 DOI: 10.1016/j.clinre.2021.101648] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Revised: 01/14/2021] [Accepted: 01/29/2021] [Indexed: 02/04/2023]
Abstract
BACKGROUND Long non-coding RNA 01559 (LINC01559) has been found to be associated with the tumorigenesis of malignant tumors. However, the expression pattern and the potential molecular mechanism of LINC01559 in hepatocellular carcinoma (HCC) progression remain unclear. METHODS Expression profile and clinical data of patients with HCC were retrieved from The Cancer Genome Atlas database. The quantitative real-time PCR (qRT-PCR) and western blot assays were used to detect the mRNA and protein levels of indicated molecules. Loss-of-function of LINC01559 and microRNA-511 (miR-511) assays were implemented to validate their roles in regulating proliferation, invasion and migration of HCC HepG2 and Huh7 cells. Bioinformatics and luciferase reporter assays were used to determine the possible interactions between LINC01559, miR-511 and solute carrier family 38 member 1 (SLC38A1). RESULTS LINC01559 was highly expressed, and related to poor prognosis in HCC patients. LINC01559-knockdown restrained the proliferation and growth of HepG2 and Huh7 cells. Furthermore, LINC01559 can function as a sponge for miR-511, which was downregulated in HCC patients. Downregulation of miR-511 significantly increased the cell viability, invasive and migratory capacities, and could abolish the suppressive effect of LINC01559-knockdown on these HCC cells. Moreover, SLC38A1 was a target of miR-511 and upregulated in HCC. Knockdown of LINC01559 significantly reduced while miR-511 inhibitor notably elevated the mRNA and protein levels of SLC38A1, which were abrogated by downregulation of LINC01559 and miR-511 simultaneously. CONCLUSIONS LINC01559 functioned as a competitive endogenous RNA mediating the malignant phenotypes of HCC cells via sponging miR-511, and may be a considerable therapeutic bio-target in HCC.
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19
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Cancer, Retrogenes, and Evolution. Life (Basel) 2021; 11:life11010072. [PMID: 33478113 PMCID: PMC7835786 DOI: 10.3390/life11010072] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2020] [Revised: 01/14/2021] [Accepted: 01/15/2021] [Indexed: 12/18/2022] Open
Abstract
This review summarizes the knowledge about retrogenes in the context of cancer and evolution. The retroposition, in which the processed mRNA from parental genes undergoes reverse transcription and the resulting cDNA is integrated back into the genome, results in additional copies of existing genes. Despite the initial misconception, retroposition-derived copies can become functional, and due to their role in the molecular evolution of genomes, they have been named the “seeds of evolution”. It is convincing that retrogenes, as important elements involved in the evolution of species, also take part in the evolution of neoplastic tumors at the cell and species levels. The occurrence of specific “resistance mechanisms” to neoplastic transformation in some species has been noted. This phenomenon has been related to additional gene copies, including retrogenes. In addition, the role of retrogenes in the evolution of tumors has been described. Retrogene expression correlates with the occurrence of specific cancer subtypes, their stages, and their response to therapy. Phylogenetic insights into retrogenes show that most cancer-related retrocopies arose in the lineage of primates, and the number of identified cancer-related retrogenes demonstrates that these duplicates are quite important players in human carcinogenesis.
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20
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Zhu LL, Wu Z, Li RK, Xing X, Jiang YS, Li J, Wang YH, Hu LP, Wang X, Qin WT, Sun YW, Zhang ZG, Yang Q, Jiang SH. Deciphering the genomic and lncRNA landscapes of aerobic glycolysis identifies potential therapeutic targets in pancreatic cancer. Int J Biol Sci 2021; 17:107-118. [PMID: 33390837 PMCID: PMC7757027 DOI: 10.7150/ijbs.49243] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2020] [Accepted: 10/29/2020] [Indexed: 12/17/2022] Open
Abstract
Aerobic glycolysis, also known as the Warburg effect, is emerged as a hallmark of most cancer cells. Increased aerobic glycolysis is closely associated with tumor aggressiveness and predicts a poor prognosis. Pancreatic ductal adenocarcinoma (PDAC) is characterized by prominent genomic aberrations and increased glycolytic phenotype. However, the detailed molecular events implicated in aerobic glycolysis of PDAC are not well understood. In this study, we performed a comprehensive molecular characterization using multidimensional ''omic'' data from The Cancer Genome Atlas (TCGA). Detailed analysis of 89 informative PDAC tumors identified substantial copy number variations (MYC, GATA6, FGFR1, IDO1, and SMAD4) and mutations (KRAS, SMAD4, and RNF43) related to aerobic glycolysis. Moreover, integrated analysis of transcriptional profiles revealed many differentially expressed long non-coding RNAs involved in PDAC aerobic glycolysis. Loss-of-function studies showed that LINC01559 and UNC5B-AS1 knockdown significantly inhibited the glycolytic capacity of PDAC cells as revealed by reduced glucose uptake, lactate production, and extracellular acidification rate. Moreover, genetic silencing of LINC01559 and UNC5B-AS1 suppressed tumor growth and resulted in alterations in several signaling pathways, such as TNF signaling pathway, IL-17 signaling pathway, and transcriptional misregulation in cancer. Notably, high expression of LINC01559 and UNC5B-AS1 predicted poor patient prognosis and correlated with the maximum standard uptakevalue (SUVmax) in PDAC patients who received preoperative 18F-FDG PET/CT. Taken together, our results decipher the glycolysis-associated copy number variations, mutations, and lncRNA landscapes in PDAC. These findings improve our knowledge of the molecular mechanism of PDAC aerobic glycolysis and may have practical implications for precision cancer therapy.
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Affiliation(s)
- Li-Li Zhu
- State Key Laboratory of Oncogenes and Related Genes, Ren Ji Hospital, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P.R. China.,State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Zheng Wu
- Department of Radiation Oncology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200127, PR China
| | - Rong-Kun Li
- Institute of Oncology, Affiliated Hospital of Jiangsu University, Zhenjiang 212001, P.R. China
| | - Xin Xing
- The Fengxian Hospital, Southern Medical University, Shanghai 201499, PR China
| | - Yong-Sheng Jiang
- Department of Biliary-Pancreatic Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200217, P.R. China
| | - Jun Li
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Ya-Hui Wang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Li-Peng Hu
- State Key Laboratory of Oncogenes and Related Genes, Ren Ji Hospital, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P.R. China.,State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Xu Wang
- Institute of Oncology, Affiliated Hospital of Jiangsu University, Zhenjiang 212001, P.R. China
| | - Wei-Ting Qin
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Yong-Wei Sun
- Department of Biliary-Pancreatic Surgery, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200217, P.R. China
| | - Zhi-Gang Zhang
- State Key Laboratory of Oncogenes and Related Genes, Ren Ji Hospital, School of Biomedical Engineering, Shanghai Jiao Tong University, Shanghai 200240, P.R. China.,State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Qin Yang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
| | - Shu-Heng Jiang
- State Key Laboratory of Oncogenes and Related Genes, Shanghai Cancer Institute, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai 200240, P.R. China
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21
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Deng Z, Li X, Shi Y, Lu Y, Yao W, Wang J. A Novel Autophagy-Related IncRNAs Signature for Prognostic Prediction and Clinical Value in Patients With Pancreatic Cancer. Front Cell Dev Biol 2020; 8:606817. [PMID: 33384999 PMCID: PMC7769875 DOI: 10.3389/fcell.2020.606817] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Accepted: 11/16/2020] [Indexed: 01/10/2023] Open
Abstract
Autophagy is an important bioprocess throughout the occurrence and development of cancer. However, the role of autophagy-related lncRNAs in pancreatic cancer (PC) remains obscure. In the study, we identified the autophagy-related lncRNAs (ARlncRNAs) and divided the PC patients from The Cancer Genome Atlas into training and validation set. Firstly, we constructed a signature in the training set by the least absolute shrinkage and selection operator penalized cox regression analysis and the multivariate cox regression analysis. Then, we validated the independent prognostic role of the risk signature in both training and validation set with survival analysis, receiver operating characteristic analysis, and Cox regression. The nomogram was established to demonstrate the predictive power of the signature. Moreover, high risk scores were significantly correlated to worse outcomes and severe clinical characteristics. The Pearson’s analysis between risk scores with immune cells infiltration, tumor mutation burden, and the expression level of chemotherapy target molecules indicated that the signature could predict efficacy of immunotherapy and targeted therapy. Next, we constructed an lncRNA–miRNA–mRNA regulatory network and identified several potential small molecule drugs in the Connectivity Map (CMap). What’s more, quantitative real-time PCR (qRT-PCR) analysis showed that serum LINC01559 could serve as a diagnostic biomarker. In vitro analysis showed inhibition of LINC01559 suppressed PC cell proliferation, migration, and invasion. Additionally, silencing LINC01559 suppressed gemcitabine-induced autophagy and promoted the sensitivity of PC cells to gemcitabine. In conclusion, we identified a novel ARlncRNAs signature with valuable clinical utility for reliable prognostic prediction and personalized treatment of PC patients. And inhibition of LINC01559 might be a novel strategy to overcome chemoresistance.
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Affiliation(s)
- Zhengdong Deng
- Department of Biliary and Pancreatic Surgery/Cancer Research Center Affiliated Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Xiangyu Li
- Department of Biliary and Pancreatic Surgery/Cancer Research Center Affiliated Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yuanxin Shi
- Department of Biliary and Pancreatic Surgery/Cancer Research Center Affiliated Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yun Lu
- Department of Biliary and Pancreatic Surgery/Cancer Research Center Affiliated Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Wei Yao
- Department of Oncology Affiliated Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Jianming Wang
- Department of Biliary and Pancreatic Surgery/Cancer Research Center Affiliated Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.,Affiliated Tianyou Hospital, Wuhan University of Science and Technology, Wuhan, China
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22
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Exosome-transferred LINC01559 promotes the progression of gastric cancer via PI3K/AKT signaling pathway. Cell Death Dis 2020; 11:723. [PMID: 32895368 PMCID: PMC7477231 DOI: 10.1038/s41419-020-02810-5] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2020] [Revised: 06/24/2020] [Accepted: 06/29/2020] [Indexed: 12/29/2022]
Abstract
Increasing evidence indicates that long non-coding RNAs (lncRNAs) are associated with the progression of human cancers. However, the expression level and function of LINC01559 (long intergenic non-protein coding RNA 1559) in gastric cancer (GC) are rarely reported. Here we found that LINC01559 was upregulated in GC tissues based on GEPIA (Gene Expression Profiling Interactive Analysis) and TCGA (The Cancer Genome Atlas) databases. Also, LINC01559 was expressed at a lower level in GC cells than in mesenchymal stem cells (MSCs). In vitro experiments revealed that silencing LINC01559 remarkably hindered GC cell proliferation, migration and stemness. Then, we identified that LINC01559 was transmitted form MSCs to GC cells via the exosomes. Immunofluorescence staining and electron microscope validated the existence of exosomes in GC cells. Mechanistically, LINC01559 sponged miR-1343-3p to upregulate PGK1 (phosphoglycerate kinase 1), therefore activating PI3K/AKT pathway. Moreover, LINC01559 recruited EZH2 (enhancer of zeste 2 polycomb repressive complex 2 subunit) to PTEN (phosphatase and tensin homolog) promoter, inducing the methylation of PTEN promoter and finally resulting in PTEN repression. Of note, LINC01559 targeted both PGK1 and PTEN to promote GC progression by activating PI3K/AKT pathway. Taken together, our study demonstrated that LINC01559 accelerated GC progression via upregulating PGK1 and downregulating PTEN to trigger phosphatidylinositol 3-kinase/AKT serine/threonine kinase (PI3K/AKT) pathway, indicating LINC01559 as a potential biomarker for GC treatment.
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23
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Ji Y, Xue Y. Identification and Clinical Validation of 4-lncRNA Signature for Predicting Survival in Head and Neck Squamous Cell Carcinoma. Onco Targets Ther 2020; 13:8395-8411. [PMID: 32904613 PMCID: PMC7457573 DOI: 10.2147/ott.s257200] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Accepted: 06/26/2020] [Indexed: 12/24/2022] Open
Abstract
Background The prognosis of patients with head and neck squamous cell carcinoma (HNSCC) is still poor due to the lack of effective prognostic biomarkers. lncRNA is an important survival prognostic indicator and has important biological functions in tumorigenesis. Methods RNA-seq was re-annotated, and comprehensive clinical information was obtained from the GEO database. Univariate and multivariate Cox regression analyses were used to construct the lncRNA prognosis signature. Gene set enrichment analysis (GSEA) enrichment analysis method is used to explore the possible mechanism of the selected lncRNA influencing HNSCC development. The rms package was used to calculate the C-index to evaluate the overall prediction performance between different signature. PCR is used to detect the expression of selected lncRNA in cancer and adjacent tissues. Results In the GSE65858 training cohort, 124 probes significantly related to prognosis were identified, 11 significant lncRNAs were further selected by rbsurv dimensionality reduction analysis. Finally, 4-lncRNA signature was constructed by multivariate Cox analysis. This signature was associated with tumor-associated pathway and is an independent factor of the patient’s prognosis. 4-lncRNA signature has strong robustness and can exert stable prediction performance in different cohorts. A nomogram comprising the prognostic model to predict the overall survival was established. The 4-lncRNA signature was significantly upregulated in HNSCC samples. Conclusion The predictive model and nomogram will enable patients to be more accurately managed in trials and clinical practices and could be applied as a new prognostic model for predicting survival of HNSCC patients.
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Affiliation(s)
- Yanping Ji
- Department of Pathology, Eye, Ear, Nose and Throat Hospital, Fudan University, Shanghai, People's Republic of China
| | - Yu Xue
- Department of General Surgery, Pudong Hospital, Shanghai, People's Republic of China
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24
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Xie J, Zhong Y, Chen R, Li G, Luo Y, Yang J, Sun Z, Liu Y, Liu P, Wang N, An J, Li C, Song Y. Serum long non-coding RNA LINC00887 as a potential biomarker for diagnosis of renal cell carcinoma. FEBS Open Bio 2020; 10:1802-1809. [PMID: 32654370 PMCID: PMC7459398 DOI: 10.1002/2211-5463.12930] [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: 03/29/2020] [Revised: 07/02/2020] [Accepted: 07/09/2020] [Indexed: 12/19/2022] Open
Abstract
The identification of non‐invasive biomarkers for the detection of renal cell carcinoma (RCC) in early‐stage patients may help improve disease outcome. Certain long non‐coding RNAs (lncRNAs) have been reported to be possible biomarkers for the diagnosis and prognosis of cancer. Here, we examined the suitability of the lncRNA LINC00887 as a potential biomarker for RCC because its expression has been shown to be elevated in RCC tissue versus normal tissue in the Gene Expression Profiling Interactive Analysis (GEPIA) database. We found that LINC00887 expression is significantly increased in early‐stage RCC tissues and the serum of early‐stage RCC patients compared to matched normal tissues and the serum of healthy subjects, respectively. We also demonstrated that elevated serum LINC00887 is generated from the tumor tissues of RCC patients. Moreover, a receiver operating characteristic (ROC) curve was generated to analyze the diagnostic value of serum LINC00887. The area under the ROC cure differentiating early‐stage RCC patients from healthy subjects was 0.8001, with a sensitivity of 71.05% and a specificity of 89.87%. Furthermore, we found that LINC00887 promotes RCC cell proliferation in vitro. Taken together, our findings suggest that a serum LINC00887 signature is associated with RCC cell proliferation and may be a potential biomarker for the detection of early‐stage RCC.
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Affiliation(s)
- Junjie Xie
- Department of Urology, Eighth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Yu Zhong
- Department of Urology, 958th Hospital of PLA, Southwest Hospital, Army Medical University, Chongqing, China
| | - Rong Chen
- Center of Clinical Laboratory, First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Gang Li
- Department of Urology, Eighth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Yongwen Luo
- Department of Urology, Zhongnan Hospital of Wuhan University, Wuhan, China
| | - Jintao Yang
- Department of Urology, Eighth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Zhongwei Sun
- Department of Urology, 967th Hospital of PLA, Dalian, China
| | - Yanzhong Liu
- Department of Urology, Eighth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Peipei Liu
- Center of Clinical Laboratory, First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Na Wang
- Outpatient Comprehensive Treatment Area, First Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Jiaqi An
- Shandong First Medical University, Shandong, China
| | - Chao Li
- Department of Urology, Eighth Medical Center, Chinese PLA General Hospital, Beijing, China
| | - Yang Song
- Center of Clinical Laboratory, First Medical Center, Chinese PLA General Hospital, Beijing, China
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25
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Chen X, Wang J, Xie F, Mou T, Zhong P, Hua H, Liu P, Yang Q. Long noncoding RNA LINC01559 promotes pancreatic cancer progression by acting as a competing endogenous RNA of miR-1343-3p to upregulate RAF1 expression. Aging (Albany NY) 2020; 12:14452-14466. [PMID: 32678071 PMCID: PMC7425501 DOI: 10.18632/aging.103487] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2020] [Accepted: 05/27/2020] [Indexed: 12/17/2022]
Abstract
Background: An increasing number of studies have shown that lncRNAs are involved in the biological processes of pancreatic cancer (PC). Hence, we investigated the role of a novel noncoding RNA, LINC01559, involved in PC progression. Results: LINC01559 and RAF1 were highly expressed in PC, while miR-1343-3p had low expression. High expression of LINC01559 was significantly associated with large tumors, lymph node metastasis, and poor prognosis. Functional experiment results revealed that silencing of LINC01559 significantly suppressed PC cell proliferation and metastasis. Meanwhile, LINC01559 could act as a ceRNA to competitively sponge miR-1343-3p to up-regulate RAF1 and activate its downstream ERK pathway Conclusions: LINC01559 functions as an oncogene in PC progression through acting as a ceRNA of miR-1343-3p. Hence, LINC01559 is a potential diagnostic and therapeutic target. Methods: RT-qPCR was performed to determine the expression of LINC01559 and miR-1343-3p in PC. Individual patient data were collected to investigate the correlation between clinicopathological features and LINC01559 expression. Subsequently, the expression of LINC01559, miR-1343-3p, and RAF1 was altered using transfection of vectors or inhibitors. Gain- and loss-of-function assays and mechanistic assays were applied to verify the effects of LINC01559, miR-1343-3p, and RAF1 on PC cell proliferation and metastasis in vivo and in vitro.
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Affiliation(s)
- Xiao Chen
- Department of Osteology, The First Peoples Hospital of Neijiang, Neijiang, Sichuan, China
| | - Jie Wang
- Department of Hepatic-Biliary-Pancreatic Surgery, The First Peoples Hospital of Neijiang, Neijiang, Sichuan, China
| | - Fei Xie
- Department of Hepatic-Biliary-Pancreatic Surgery, The First Peoples Hospital of Neijiang, Neijiang, Sichuan, China
| | - Tinggang Mou
- Department of Hepatic-Biliary-Pancreatic Surgery, The First Peoples Hospital of Neijiang, Neijiang, Sichuan, China
| | - Pingyong Zhong
- Department of Hepatic-Biliary-Pancreatic Surgery, The First Peoples Hospital of Neijiang, Neijiang, Sichuan, China
| | - Hao Hua
- Department of Hepatic-Biliary-Pancreatic Surgery, The First Peoples Hospital of Neijiang, Neijiang, Sichuan, China
| | - Pan Liu
- Department of Hepatic-Biliary-Pancreatic Surgery, The First Peoples Hospital of Neijiang, Neijiang, Sichuan, China
| | - Qin Yang
- Department of Gastroenterology, The First Peoples Hospital of Neijiang, Neijiang, Sichuan, China
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26
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Luan W, Ding Y, Yuan H, Ma S, Ruan H, Wang J, Lu F, Bu X. Long non-coding RNA LINC00520 promotes the proliferation and metastasis of malignant melanoma by inducing the miR-125b-5p/EIF5A2 axis. J Exp Clin Cancer Res 2020; 39:96. [PMID: 32466797 PMCID: PMC7254730 DOI: 10.1186/s13046-020-01599-7] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2020] [Accepted: 05/19/2020] [Indexed: 12/15/2022] Open
Abstract
BACKGROUND Long intergenic non-protein coding RNA 520 (LINC00520), a novel identified lncRNA, has been shown to modulate the malignant phenotype of tumor cells in some malignant tumors. However, the exact role and molecular mechanism of LINC00520 in malignant melanoma has not been studied. METHODS The expression of LINC00520 in melanoma tissues were detected by using RNA-seq analysis and qRT-PCR. Melanoma cases from the public databases (The Cancer Genome Atlas (TCGA), GEO#GSE15605, GEO#GSE34460 and GEO#GSE24996) were included in this study. CCK-8 assay, EdU assay, transwell and scratch wound assay were used to explore the role of LINC00520 in melanoma cells. Luciferase reporter assays, MS2-RIP, RNA pull-down and RNA-ChIP assay were used to demonstrate the molecular biological mechanism of LINC00520 in melanoma. RESULTS We found that LICN00520 was found to be overexpressed in melanoma tissue. High expression of LICN00520 is a risk factor for the prognosis of melanoma patients. LINC00520 promotes the proliferation, invasion and migration of melanoma cells. LICN00520 exerted its oncogenic role by competitive binding miR-125b-5p to promote Eukaryotic initiation factor 5A2 (EIF5A2) expression. We also showed that LICN00520 promotes the growth and metastasis of melanoma in vivo through regulating miR-125b-5p/EIF5A2 axis. CONCLUSIONS All results elucidated the role and molecular mechanism of LINC00520 in the malignant development of melanoma. LINC00520, a new oncogene in melanoma, maybe serve as a survival biomarkers or therapeutic target for melanoma patients.
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Affiliation(s)
- Wenkang Luan
- Department of Plastic Surgery, Affiliated People's Hospital of Jiangsu University, 8 Dianli Road, Zhenjiang, 212000, Jiangsu, China.
| | - Yuting Ding
- Department of Rehabilitation, Changshu No. 2 People's Hospital (The 5th Clinical Medical College of Yangzhou University), Changshu, Jiangsu, China
| | - Haitao Yuan
- Department of General Surgery, Affiliated People's Hospital of Jiangsu University, 8 Dianli Road, Zhenjiang, 212000, Jiangsu, China
| | - Shaojun Ma
- Department of Plastic Surgery, Affiliated People's Hospital of Jiangsu University, 8 Dianli Road, Zhenjiang, 212000, Jiangsu, China
| | - Hongru Ruan
- Department of Plastic Surgery, Affiliated People's Hospital of Jiangsu University, 8 Dianli Road, Zhenjiang, 212000, Jiangsu, China
| | - Jinlong Wang
- Department of Plastic Surgery, Affiliated People's Hospital of Jiangsu University, 8 Dianli Road, Zhenjiang, 212000, Jiangsu, China
| | - Feng Lu
- Department of Plastic Surgery, Affiliated People's Hospital of Jiangsu University, 8 Dianli Road, Zhenjiang, 212000, Jiangsu, China
| | - Xuefeng Bu
- Department of General Surgery, Affiliated People's Hospital of Jiangsu University, 8 Dianli Road, Zhenjiang, 212000, Jiangsu, China.
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27
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Xie Y, Hu X. Increased levels of long noncoding RNA LINC00691 correlate with poor prognosis in non-small-cell lung cancer patients. J Clin Lab Anal 2020; 34:e23357. [PMID: 32420681 PMCID: PMC7439350 DOI: 10.1002/jcla.23357] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2019] [Revised: 04/01/2020] [Accepted: 04/03/2020] [Indexed: 02/01/2023] Open
Abstract
Background Although long intergenic non‐protein coding RNA 691 (LINC00691) has been functionally identified in several tumors, the association between LINC00691 and non–small‐cell lung cancer (NSCLC) has not been reported. The objective of our study was to explore the clinical significance of LINC00691 in NSCLC. Methods RT‐PCR was performed to detect LINC00691 levels in 177 pairs of human NSCLC tissues and matched normal lung specimens. A chi‐squared test was used to analyze the possible influence of LINC00691 on the clinical progress of NSCLC. Kaplan‐Meier methods were used to determine differences in patient survival. The prognostic value of survival variables was evaluated using univariate and multivariate analyses. Results We found that LINC00691 levels were increased in tumor specimens compared with matched normal lung tissues (P < .01). Increased LINC00691 levels correlated with lymph node metastasis (P = .025) and advanced TNM stage (P = .002) in NSCLC patients. Moreover, clinical investigations revealed that NSCLC patients with high LINC00691 expression had a shorter overall survival than those with low LINC00691 expression (P = .0042). Finally, Cox regression assays confirmed LINC00691 as an independent prognostic factor for NSCLC patients. Conclusions The aberrant expression of LINC00691 may function as a reliable marker for the progression and prognosis of NSCLC in patients.
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Affiliation(s)
- Yan Xie
- Department of Thoracic Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
| | - Xiuhua Hu
- Department of Orthopedic Surgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, China
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28
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Complex Analysis of Retroposed Genes' Contribution to Human Genome, Proteome and Transcriptome. Genes (Basel) 2020; 11:genes11050542. [PMID: 32408516 PMCID: PMC7290577 DOI: 10.3390/genes11050542] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2020] [Revised: 05/06/2020] [Accepted: 05/08/2020] [Indexed: 02/07/2023] Open
Abstract
Gene duplication is a major driver of organismal evolution. One of the main mechanisms of gene duplications is retroposition, a process in which mRNA is first transcribed into DNA and then reintegrated into the genome. Most gene retrocopies are depleted of the regulatory regions. Nevertheless, examples of functional retrogenes are rapidly increasing. These functions come from the gain of new spatio-temporal expression patterns, imposed by the content of the genomic sequence surrounding inserted cDNA and/or by selectively advantageous mutations, which may lead to the switch from protein coding to regulatory RNA. As recent studies have shown, these genes may lead to new protein domain formation through fusion with other genes, new regulatory RNAs or other regulatory elements. We utilized existing data from high-throughput technologies to create a complex description of retrogenes functionality. Our analysis led to the identification of human retroposed genes that substantially contributed to transcriptome and proteome. These retrocopies demonstrated the potential to encode proteins or short peptides, act as cis- and trans- Natural Antisense Transcripts (NATs), regulate their progenitors’ expression by competing for the same microRNAs, and provide a sequence to lncRNA and novel exons to existing protein-coding genes. Our study also revealed that retrocopies, similarly to retrotransposons, may act as recombination hot spots. To our best knowledge this is the first complex analysis of these functions of retrocopies.
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29
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Xing L, Zhang X, Guo M, Zhang X, Liu F. Application of Machine Learning in Developing a Novelty Five-Pseudogene Signature to Predict Prognosis of Head and Neck Squamous Cell Carcinoma: A New Aspect of "Junk Genes" in Biomedical Practice. DNA Cell Biol 2020; 39:709-723. [PMID: 32045271 DOI: 10.1089/dna.2019.5272] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023] Open
Abstract
Head and neck squamous cell carcinoma (HNSCC) is the sixth malignancy, which is characterized by poor prognosis or high mortality because of the lack of predicting markers. Aberrant cancer pseudogenes have been found predictive for prognosis. We aim to identify a pseudogene-based prognosis signature for HNSCC by machine learning. RNA-seq data were downloaded from The Cancer Genome Atlas, and 700 differentially-expressed pseudogenes were identified. The survival-related pseudogenes were screened through COX-regression analysis, which includes univariate regression, least absolute shrinkage and selection operator regression, and multivariate regression, and a five-pseudogene signature was constructed. The value of prediction for the signature was validated in multiple subgroups in terms of survival. Gene set enrichment analysis (GSEA) and coexpression analysis were used to determine the underlying biological functions. Seven hundred dysregulated pseudogenes were identified, and the five-pseudogene signature can distinguish the low-risk and high-risk patients for both training and testing sets and predicted prognosis with high sensitivity and specificity. Furthermore, the signature was applicable to patients of different genders, ages, stages, and grades. Coexpression analysis revealed that the five-pseudogene is associated with immune system. GSEA showed cancer-related biological process and pathways the five-pseudogene involved in. The five-pseudogene signature is not only a novel marker for prognosis but also a promising signature for monitoring therapeutic schedule. Therefore, our findings may have potential clinical significance.
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Affiliation(s)
- Lu Xing
- School and Hospital of Stomatology, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong, China
| | - Xiaoqi Zhang
- Sichuan University, West China Hospital of Stomatology, Department of Orthodontontics, State Key Laboratory of Oral Disease, National Clinical Research Centre of Oral Disease, Chengdu, China
| | - Mingzhu Guo
- School and Hospital of Stomatology, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong, China
| | - Xiaoqian Zhang
- Department of Stomatology, Haiyuan College of Kunming Medical University, Kunming, China
| | - Feng Liu
- School and Hospital of Stomatology, Shandong University & Shandong Key Laboratory of Oral Tissue Regeneration & Shandong Engineering Laboratory for Dental Materials and Oral Tissue Regeneration, Jinan, Shandong, China
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30
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Wang Y, Yang C, Liu X, Zheng J, Zhang F, Wang D, Xue Y, Li X, Shen S, Shao L, Yang Y, Liu L, Ma J, Liu Y. Transcription factor AP-4 (TFAP4)-upstream ORF coding 66 aa inhibits the malignant behaviors of glioma cells by suppressing the TFAP4/long noncoding RNA 00520/microRNA-520f-3p feedback loop. Cancer Sci 2020; 111:891-906. [PMID: 31943575 PMCID: PMC7060482 DOI: 10.1111/cas.14308] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2019] [Revised: 12/27/2019] [Accepted: 01/02/2020] [Indexed: 02/06/2023] Open
Abstract
Upstream ORF (uORF) is a translational initiation element located in the 5′UTR of eukaryotic mRNAs. Studies have found that uORFs play an important regulatory role in many diseases. Based on The Cancer Genome Atlas database, the results of our experiments and previous research evidence, we investigated transcription factor AP‐4 (TFAP4) and its uORF, LIM and SH3 protein 1 (LASP1), long noncoding RNA 00520 (LINC00520), and microRNA (miR)‐520f‐3p as candidates involved in glioma malignancy, which is a poorly understood process. Both TFAP4‐66aa‐uORF and miR‐520f‐3p were downregulated, and TFAP4, LASP1, and LINC00520 were highly expressed in glioma tissues and cells. TFAP4‐66aa‐uORF or miR‐520f‐3p overexpression or TFAP4, LASP1, or LINC00520 knockdown inhibited glioma cell proliferation, migration, and invasion, but promoted apoptosis. TFAP4‐66aa‐uORF inhibited the translation of TFAP4 by binding to the TFAP4 mRNA. MicroRNA‐520f‐3p inhibited TFAP4 expression by binding to its 3′UTR. However, LINC00520 could promote the expression of TFAP4 by competitively binding to miR‐520f‐3p. In addition, TFAP4 transcriptionally activated LASP1 and LINC00520 expression by binding to their promoter regions, forming a positive feedback loop of TFAP4/LINC00520/miR‐520f‐3p. Our findings together indicated that TFAP4‐66aa‐uORF inhibited the TFAP4/LINC00520/miR‐520f‐3p feedback loop by directly inhibiting TFAP4 expression, subsequently leading to inhibition of glioma malignancy. This provides a basis for developing new therapeutic approaches for glioma treatment.
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Affiliation(s)
- Yipeng Wang
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
| | - Chunqing Yang
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
| | - Xiaobai Liu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
| | - Jian Zheng
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
| | - Fangfang Zhang
- Department of Neurobiology, School of Life Sciences, China Medical University, Shenyang, China.,Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang, China.,Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang, China
| | - Di Wang
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
| | - Yixue Xue
- Department of Neurobiology, School of Life Sciences, China Medical University, Shenyang, China.,Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang, China.,Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang, China
| | - Xiaozhi Li
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
| | - Shuyuan Shen
- Department of Neurobiology, School of Life Sciences, China Medical University, Shenyang, China.,Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang, China.,Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang, China
| | - Lianqi Shao
- Department of Neurobiology, School of Life Sciences, China Medical University, Shenyang, China.,Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang, China.,Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang, China
| | - Yang Yang
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
| | - Libo Liu
- Department of Neurobiology, School of Life Sciences, China Medical University, Shenyang, China.,Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang, China.,Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang, China
| | - Jun Ma
- Department of Neurobiology, School of Life Sciences, China Medical University, Shenyang, China.,Key Laboratory of Cell Biology, Ministry of Public Health of China, China Medical University, Shenyang, China.,Key Laboratory of Medical Cell Biology, Ministry of Education of China, China Medical University, Shenyang, China
| | - Yunhui Liu
- Department of Neurosurgery, Shengjing Hospital of China Medical University, Shenyang, China.,Liaoning Clinical Medical Research Center in Nervous System Disease, Shenyang, China.,Key Laboratory of Neuro-oncology in Liaoning Province, Shenyang, China
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Guo Q, Xu L, Peng R, Ma Y, Wang Y, Chong F, Song M, Dai L, Song C. Characterization of lncRNA LINC00520 and functional polymorphisms associated with breast cancer susceptibility in Chinese Han population. Cancer Med 2020; 9:2252-2268. [PMID: 31997582 PMCID: PMC7064040 DOI: 10.1002/cam4.2893] [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: 12/10/2019] [Revised: 01/17/2020] [Accepted: 01/17/2020] [Indexed: 12/24/2022] Open
Abstract
Background The aim was to evaluate the association between the LINC00520 genetic polymorphisms and breast cancer (BC) susceptibility. Methods Nine single‐nucleotide polymorphisms (SNPs) on LINC00520 genotyping were performed in 504 BC patients and 505 cancer‐free controls in Chinese Han population to study the relationship between LINC00520 polymorphism and BC susceptibility. qRT‐PCR and luciferase tests were used to explore how rs12880540 affected the expression of LINC00520. Results The genotype GG (OR:3.58, 95%CI:1.32‐9.69) in rs8012083 increased the risk of triple‐negative BC. The genotype GG (OR:0.31, 95%CI:0.14‐0.69) in rs8012083, the genotype AA (OR:2.74, 95%CI:1.01‐7.42) in rs2152275, and genotype TG (OR:1.62, 95%CI:1.04‐2.52) in rs12880540 were associated with HER‐2 status. The dominant (OR:0.65, 95%CI:0.45‐0.95) and overdominant genetic model (OR:0.67, 95%CI:0.46‐0.98) consistently showed that rs11622641 T was significantly associated with lower risk of BC. Similarly, the recessive genetic model (OR:1.57, 95%CI:1.07‐2.30) of rs12880540 and the dominant (OR:1.62, 95%CI:1.24‐2.11) and overdominant (OR:1.56, 95%CI:1.19‐2.03) genetic model of rs2152278 may increase the risk of BC. The relative expression of LINC00520 increased linearly with the increase in the number of rs12880540 mutations. rs12880540 alleles were due to the interaction between LINC00520 and miR‐3122 at T, but the mutation of rs12880540 G > T had no effect on the binding ability of LINC00520 and miR‐3122. Conclusion A genetic variant of rs8012083 in LINC00520 may be used as a biomarker for triple‐negative BC after further evaluation of diagnostic tests. The genetic variant of LINC00520 was related to the susceptibility of BC, and rs12880540 might affect the corresponding mRNA expression of lncRNA LINC00520.
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Affiliation(s)
- Qiaoyun Guo
- Department for Endemic Disease Control and Prevention, Henan Provincial Center for Disease Control and Prevention, Zhengzhou, Henan, PR China.,Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, PR China.,Henan Key Laboratory of Tumor Epidemiology, Zhengzhou, Henan, PR China
| | - Linping Xu
- Department of Teaching and Research, Henan Tumor Hospital, Zhengzhou, Henan, PR China
| | - Rui Peng
- Department of Teaching and Research, Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, PR China
| | - Yan Ma
- Henan Luoyang Orthopedic Hospital (Henan Provincial Orthopedic Hospital), Zhengzhou, China.,Henan Provincial Orthopedic Institute, Zhengzhou, China
| | - Yanli Wang
- Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, PR China.,Henan Key Laboratory of Tumor Epidemiology, Zhengzhou, Henan, PR China
| | - Feifei Chong
- Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, PR China.,Henan Key Laboratory of Tumor Epidemiology, Zhengzhou, Henan, PR China
| | - Mengmeng Song
- Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, PR China.,Henan Key Laboratory of Tumor Epidemiology, Zhengzhou, Henan, PR China
| | - Liping Dai
- Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, PR China.,Henan Key Laboratory of Tumor Epidemiology, Zhengzhou, Henan, PR China
| | - Chunhua Song
- Department of Epidemiology and Statistics, College of Public Health, Zhengzhou University, Zhengzhou, Henan, PR China.,Henan Key Laboratory of Tumor Epidemiology, Zhengzhou, Henan, PR China
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Lou C, Zhao J, Gu Y, Li Q, Tang S, Wu Y, Tang J, Zhang C, Li Z, Zhang Y. LINC01559 accelerates pancreatic cancer cell proliferation and migration through YAP-mediated pathway. J Cell Physiol 2019; 235:3928-3938. [PMID: 31608998 DOI: 10.1002/jcp.29288] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2019] [Accepted: 09/30/2019] [Indexed: 12/12/2022]
Abstract
Pancreatic cancer (PC) is one of the top two most fatal cancers, with the poorest survival rate among all human malignancies. Increasing evidence suggests the involvement of long noncoding RNAs (lncRNAs) in the initiation and progression of various cancers. Herein, we investigated the role of lncRNA LINC01559 in PC. Several online databases indicated that LINC01559 was at a low expression in normal pancreatic tissues but was obviously upregulated in PAAD tissues. Further, our results showed that LINC01559 was stimulated in PC cell lines relative to normal controls. Furthermore, we validated that LINC01559 facilitated PC cell proliferation and migration in vitro. Also, silencing LINC01559 obstructed PC cell growth in vivo. Besides, LINC01559 was revealed to be mainly in the cytoplasm of PC cells and therefore served as a ceRNA of Yes-associated protein (YAP) in PC cells via sponging miR-607. Surprisingly, we also proved that LINC01559 could interact with YAP protein, which might hinder YAP phosphorylation and enhance YAP transcriptional activity in PC cells. Furthermore, we demonstrated that YAP was the downstream effector in LINC01559-regulated PC development. Collectively, our findings unmasked that LINC01559 accelerates PC progression through relying on YAP, providing a new potential target for clinical treatment of patients with PC.
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Affiliation(s)
- Changjie Lou
- Department of Gastrointestinal Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Juan Zhao
- Department of Outpatient Chemotherapy, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Yuanlong Gu
- Department of Hematology and Oncology, Taizhou Municipal Hospital, Taizhou, Zhejiang, China
| | - Qingwei Li
- Department of Gastrointestinal Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Shuli Tang
- Department of Outpatient Chemotherapy, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Yangjiazi Wu
- The Biotherapy Center, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Jiebing Tang
- Department of Gastrointestinal Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Chunhui Zhang
- Department of Gastrointestinal Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Zhiwei Li
- Department of Gastrointestinal Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Yanqiao Zhang
- Department of Gastrointestinal Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
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Lou W, Ding B, Fan W. High Expression of Pseudogene PTTG3P Indicates a Poor Prognosis in Human Breast Cancer. MOLECULAR THERAPY-ONCOLYTICS 2019; 14:15-26. [PMID: 31011629 PMCID: PMC6463746 DOI: 10.1016/j.omto.2019.03.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/01/2018] [Accepted: 03/13/2019] [Indexed: 01/16/2023]
Abstract
Pseudogenes play pivotal roles in tumorigenesis. Previous studies have suggested that pituitary tumor-transforming 3, pseudogene (PTTG3P), serves as an oncogene in human cancers. However, its expression pattern, biological function, and underlying mechanism in breast cancer remain unknown. In this study, we demonstrated an elevated expression of PTTG3P in breast cancer and discovered that PTTG3P expression correlated negatively with estrogen receptor (ER) and progesterone receptor (PR) status, but linked positively to basal-like status, triple-negative breast cancer status, Nottingham prognostic index (NPI), and Scarff-Bloom-Richardson grade. High expression of PTTG3P was also found to be associated with a poor prognosis of breast cancer. To explore the potential mechanisms of PTTG3P, a PTTG3P-microRNA (miRNA)-mRNA regulatory network was established. Co-expressed genes of PTTG3P were also obtained. Enrichment analysis for these co-expressed genes revealed that they were significantly enriched in mitotic nuclear division and cell cycle. Subsequent research on mechanism of PTTG3P indicated that its expression correlated positively with PTTG1 expression. However, no significant expression correlation between PTTG3P and PTTG2 was observed. Taken together, our findings suggest that increased expression of pseudogene PTTG3P may be used as a promising prognostic biomarker and novel therapeutic target for breast cancer.
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Affiliation(s)
- Weiyang Lou
- Program of Innovative Cancer Therapeutics, Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China.,Key Laboratory of Organ Transplantation, Zhejiang Province, Hangzhou 310003, China.,Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, Hangzhou 310000, China
| | - Bisha Ding
- Program of Innovative Cancer Therapeutics, Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China.,Key Laboratory of Organ Transplantation, Zhejiang Province, Hangzhou 310003, China.,Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, Hangzhou 310000, China
| | - Weimin Fan
- Program of Innovative Cancer Therapeutics, Division of Hepatobiliary and Pancreatic Surgery, Department of Surgery, First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou 310003, China.,Key Laboratory of Organ Transplantation, Zhejiang Province, Hangzhou 310003, China.,Key Laboratory of Combined Multi-organ Transplantation, Ministry of Public Health, Hangzhou 310000, China.,Department of Pathology and Laboratory Medicine, Medical University of South Carolina, Charleston, SC 29425, USA
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