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Li Z, Wang D, Zhang W, Shi H, Zhu M. Novel PBMC LncRNA signatures as diagnostic biomarkers for colorectal cancer. Pathol Res Pract 2024; 253:154985. [PMID: 38039742 DOI: 10.1016/j.prp.2023.154985] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 10/20/2023] [Accepted: 11/23/2023] [Indexed: 12/03/2023]
Abstract
The expression of long non-coding RNAs (LncRNAs) in peripheral blood mononuclear cell (PBMC) and its clinical relevance in colorectal cancer (CRC) remains largely uncharacterized. To address these gaps, we investigated the expression profiles of lncRNAs in PBMC from CRC and healthy controls (HC) by RNA sequencing. The expression level of differentially expressed lncRNAs (DElncRNAs) were evaluated by quantitative PCR in PBMC samples from CRC patients and HC. A total of 447 DElncRNAs were identified, with 178 elevated lncRNAs and 269 decreased lncRNAs in PBMC from CRC patients as compared with that from HC. RT-PCR results supported a significant elevation of NEAT1:11, lnc-PDZD8-1:5 and LINC00910:16 in 98 CRC patients and 82 HC. The clinical implication of NEAT1:11, lnc-PDZD8-1:5 and LINC00910:16 as CRC diagnostic biomarker were determined by receiver operating characteristic (ROC) curve, showing sensitivity 74.5% and specificity 84.5% for joint detection the three lncRNAs. Notably, NEAT1:11 was closely related with the size and extent of primary tumor, with higher relative expression of NEAT1:11 in higher T stage (P = 0.0047). Moreover, NEAT1:11 was related with grade (P = 0.012). Collectively, PBMC from patients with CRC show significantly variable expression profiles of lncRNAs, and detection of these differential expression lncRNAs may provide useful information for basic and clinical research.
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Affiliation(s)
- Zhaosheng Li
- Department of Clinical Laboratory, The Affiliated Cancer Hospital of Nanjing Medical University & Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research, Nanjing, China
| | - Dongfeng Wang
- Department of General Surgery, The Affiliated Cancer Hospital of Nanjing Medical University & Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research, Nanjing, China
| | - Wenjun Zhang
- Department of Laboratory Medicine, Nanjing Drum Tower Hospital, Nanjing University Medical School, Nanjing, China
| | - Huina Shi
- Department of Clinical Laboratory, The Affiliated Cancer Hospital of Nanjing Medical University & Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research, Nanjing, China
| | - Mingchen Zhu
- Department of Clinical Laboratory, The Affiliated Cancer Hospital of Nanjing Medical University & Jiangsu Cancer Hospital & Jiangsu Institute of Cancer Research, Nanjing, China.
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Liu Y, Li Y, Wu Y, Zhao Y, Hu X, Sun C. The long non-coding RNA NEAT1 promotes the progression of human ovarian cancer through targeting miR-214-3p and regulating angiogenesis. J Ovarian Res 2023; 16:219. [PMID: 37986114 PMCID: PMC10662279 DOI: 10.1186/s13048-023-01309-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Accepted: 11/03/2023] [Indexed: 11/22/2023] Open
Abstract
BACKGROUND Angiogenesis and metastasis contributes substantially to the poor outcome of patients with ovarian cancer. We aimed to explore the role and mechanisms of the long non-coding RNA NEAT1 (nuclear enriched abundant transcript 1) in regulating angiogenesis and metastasis of human ovarian cancer. NEAT1 expression in human ovarian cancer tissues and cell lines including SKOV-3 and A2780 was investigated through in situ hybridization. Gene knockdown and overexpressing were achieved through lentivirus infection, transfection of plasmids or microRNA mimics. Cell viability was measured with the cell counting kit-8 assay, while apoptosis was determined by flow cytometry. Cell migration and invasion were evaluated by transwell experiments, and protein expression was determined by western blot assays or immunohistochemistry. Duo-luciferase reporter assay was employed to confirm the interaction between NEAT1 and target microRNA. In vivo tumor growth was evaluated in nude mice with xenografted SKOV-3/A2780 cells, and blood vessel formation in tumor was examined by histological staining. RESULTS NEAT1 was highly expressed in ovarian cancer tissues of patients and cell lines. MiR-214-3p was identified as a sponging target of NEAT1, and they antagonizedeach other in a reciprocal manner. NEAT1-overexpressing SKOV-3 and A2780 cells had significantly increased proliferation, reduced apoptosis, and augmented abilities of migration and invasion, while cells with NEAT1-knockdown displayed markedly attenuated traits of malignancies. Additionally, the levels of NEAT1 appeared to be positively correlated with the expression levels of angiogenesis-related molecules, including Semaphorin 4D (Sema4D), Sema4D receptor Plexin B1, T-lymphoma invasion and metastasis-inducing protein-1 (Tiam1), and Rho-like GTPases Rac1/2/3. In the xenograft mouse model, more NEAT1 expression resulted in faster in vivo tumor growth, more blood vessel formation in tumor tissues, as well as higher expression levels of angiogenesis-related molecules and CD31. CONCLUSIONS NEAT1 promotes angiogenesis and metastasis in human ovarian cancer. NEAT1 and miR-214-3p are promising targets for developing therapeutics to treat human ovarian cancer.
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Affiliation(s)
- Yang Liu
- Department of Reproduction, the Second Affiliated Hospital of Kunming Medical University, Kunming, 650101, China.
| | - Yan Li
- Department of Reproduction, the Second Affiliated Hospital of Kunming Medical University, Kunming, 650101, China
| | - Yanzhi Wu
- Department of Reproduction, the Second Affiliated Hospital of Kunming Medical University, Kunming, 650101, China
| | - Yiyue Zhao
- Department of Reproduction, the Second Affiliated Hospital of Kunming Medical University, Kunming, 650101, China
| | - Xi Hu
- Department of Reproduction, the Second Affiliated Hospital of Kunming Medical University, Kunming, 650101, China
| | - Chunyi Sun
- Department of Gynecology, the Second Affiliated Hospital of Kunming Medical University, Kunming, 650101, China.
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Eun JW, Cheong JY, Jeong JY, Kim HS. A New Understanding of Long Non-Coding RNA in Hepatocellular Carcinoma-From m 6A Modification to Blood Biomarkers. Cells 2023; 12:2272. [PMID: 37759495 PMCID: PMC10528438 DOI: 10.3390/cells12182272] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Revised: 09/12/2023] [Accepted: 09/13/2023] [Indexed: 09/29/2023] Open
Abstract
With recent advancements in biological research, long non-coding RNAs (lncRNAs) with lengths exceeding 200 nucleotides have emerged as pivotal regulators of gene expression and cellular phenotypic modulation. Despite initial skepticism due to their low sequence conservation and expression levels, their significance in various biological processes has become increasingly apparent. We provided an overview of lncRNAs and discussed their defining features and modes of operation. We then explored their crucial function in the hepatocarcinogenesis process, elucidating their complex involvement in hepatocellular carcinoma (HCC). The influential role of lncRNAs within the HCC tumor microenvironment is emphasized, illustrating their potential as key modulators of disease dynamics. We also investigated the significant influence of N6-methyladenosine (m6A) modification on lncRNA function in HCC, enhancing our understanding of both their roles and their upstream regulators. Additionally, the potential of lncRNAs as promising biomarkers was discussed in liver cancer diagnosis, suggesting a novel avenue for future research and clinical application. Finally, our work underscored the dual potential of lncRNAs as both contributors to HCC pathogenesis and innovative tools for its diagnosis. Existing challenges and prospective trajectories in lncRNA research are also discussed, emphasizing their potential in advancing liver cancer research.
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Affiliation(s)
- Jung Woo Eun
- Department of Gastroenterology, Ajou University School of Medicine, 164 World cup-ro, Yeongtong-gu, Suwon 16499, Republic of Korea; (J.W.E.); (J.Y.C.)
| | - Jae Youn Cheong
- Department of Gastroenterology, Ajou University School of Medicine, 164 World cup-ro, Yeongtong-gu, Suwon 16499, Republic of Korea; (J.W.E.); (J.Y.C.)
| | - Jee-Yeong Jeong
- Department of Biochemistry, College of Medicine, Kosin University, Seo-gu, Busan 49267, Republic of Korea;
- Institute for Medical Science, College of Medicine, Kosin University, Seo-gu, Busan 49267, Republic of Korea
| | - Hyung Seok Kim
- Department of Biochemistry, College of Medicine, Kosin University, Seo-gu, Busan 49267, Republic of Korea;
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Chen D, Wang J, Li Y, Xu C, Fanzheng M, Zhang P, Liu L. LncRNA NEAT1 suppresses cellular senescence in hepatocellular carcinoma via KIF11-dependent repression of CDKN2A. Clin Transl Med 2023; 13:e1418. [PMID: 37752791 PMCID: PMC10522973 DOI: 10.1002/ctm2.1418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 09/02/2023] [Accepted: 09/07/2023] [Indexed: 09/28/2023] Open
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) is the third leading cause of cancer-related deaths worldwide. Therapeutic options for advanced HCC are limited, which is due to a lack of full understanding of pathogenesis. Cellular senescence is a state of cell cycle arrest, which plays important roles in the pathogenesis of HCC. Mechanisms underlying hepatocellular senescence are not fully understood. LncRNA NEAT1 acts as an oncogene and contributes to the development of HCC. Whether NEAT1 modulates hepatocellular senescence in HCC is unknown. METHODS The role of NEAT1 and KIF11 in cellular senescence and tumor growth in HCC was assessed both in vitro and in vivo. RNA pulldown, mass spectrometry, Chromatin immunoprecipitation (ChIP), luciferase reporter assays, RNA FISH and immunofluorescence (IF) staining were used to explore the detailed molecular mechanism of NEAT1 and KIF11 in cellular senescence of HCC. RESULTS We found that NEAT1 was upregulated in tumor tissues and hepatoma cells, which negatively correlated with a senescence biomarker CDKN2A encoding p16INK4a and p14ARF proteins. NEAT1 was reduced in senescent hepatoma cells induced by doxorubicin (DOXO) or serum starvation. Furthermore, NEAT1 deficiency caused senescence in cultured hepatoma cells, and protected against the progression of HCC in a mouse model. During senescence, NEAT1 translocated into cytosol and interacted with a motor protein KIF11, resulting in KIF11 protein degradation and subsequent increased expression of CDKN2A in cultured hepatoma cells. Furthermore, KIF11 knockdown caused senescence in cultured hepatoma cells. Genetic deletion of Kif11 in hepatocytes inhibited the development of HCC in a mouse model. CONCLUSIONS Conclusively, NEAT1 overexpression reduces senescence and promotes tumor progression in HCC tissues and hepatoma cells, whereas NEAT1 deficiency causes senescence and inhibits tumor progression in HCC. This is associated with KIF11-dependent repression of CDKN2A. These findings lay the foundation to develop potential therapies for HCC by inhibiting NEAT1 and KIF11 or inducing senescence.
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Affiliation(s)
- Danlei Chen
- Department of Hepatobiliary SurgeryThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhuiChina
- Anhui Province Key Laboratory of Hepatopancreatobiliary SurgeryHefeiAnhuiChina
- Anhui Provincial Clinical Research Center for Hepatobiliary DiseasesHefeiAnhuiChina
| | - Jinghao Wang
- Zhejiang Cancer HospitalHangzhou Institute of MedicineChinese Academy of SciencesHangzhouZhejiangChina
| | - Yang Li
- Zhejiang Cancer HospitalHangzhou Institute of MedicineChinese Academy of SciencesHangzhouZhejiangChina
| | - Chenglin Xu
- Department of Hepatobiliary SurgeryThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhuiChina
| | - Meng Fanzheng
- Department of Hepatobiliary SurgeryThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhuiChina
- Anhui Province Key Laboratory of Hepatopancreatobiliary SurgeryHefeiAnhuiChina
- Anhui Provincial Clinical Research Center for Hepatobiliary DiseasesHefeiAnhuiChina
| | - Pengfei Zhang
- Department of Hepatobiliary SurgeryThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhuiChina
- Zhejiang Cancer HospitalHangzhou Institute of MedicineChinese Academy of SciencesHangzhouZhejiangChina
| | - Lianxin Liu
- Department of Hepatobiliary SurgeryThe First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of ChinaHefeiAnhuiChina
- Anhui Province Key Laboratory of Hepatopancreatobiliary SurgeryHefeiAnhuiChina
- Anhui Provincial Clinical Research Center for Hepatobiliary DiseasesHefeiAnhuiChina
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Alqurashi YE, Al-Hetty HRAK, Ramaiah P, Fazaa AH, Jalil AT, Alsaikhan F, Gupta J, Ramírez-Coronel AA, Tayyib NA, Peng H. Harnessing function of EMT in hepatocellular carcinoma: From biological view to nanotechnological standpoint. ENVIRONMENTAL RESEARCH 2023; 227:115683. [PMID: 36933639 DOI: 10.1016/j.envres.2023.115683] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2023] [Revised: 03/08/2023] [Accepted: 03/11/2023] [Indexed: 05/08/2023]
Abstract
Management of cancer metastasis has been associated with remarkable reduction in progression of cancer cells and improving survival rate of patients. Since 90% of mortality are due to cancer metastasis, its suppression can improve ability in cancer fighting. The EMT has been an underlying cause in increasing cancer migration and it is followed by mesenchymal transformation of epithelial cells. HCC is the predominant kind of liver tumor threatening life of many people around the world with poor prognosis. Increasing patient prognosis can be obtained via inhibiting tumor metastasis. HCC metastasis modulation by EMT and HCC therapy by nanoparticles are discussed here. First of all, EMT happens during progression and advanced stages of HCC and therefore, its inhibition can reduce tumor malignancy. Moreover, anti-cancer compounds including all-trans retinoic acid and plumbaging, among others, have been considered as inhibitors of EMT. The EMT association with chemoresistance has been evaluated. Moreover, ZEB1/2, TGF-β, Snail and Twist are EMT modulators in HCC and enhancing cancer invasion. Therefore, EMT mechanism and related molecular mechanisms in HCC are evaluated. The treatment of HCC has not been only emphasized on targeting molecular pathways with pharmacological compounds and since drugs have low bioavailability, their targeted delivery by nanoparticles promotes HCC elimination. Moreover, nanoparticle-mediated phototherapy impairs tumorigenesis in HCC by triggering cell death. Metastasis of HCC and even EMT mechanism can be suppressed by cargo-loaded nanoparticles.
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Affiliation(s)
- Yaser E Alqurashi
- Department of Biology, College of Science Al-zulfi, Majmaah University, Al-Majmaah, 11952, Saudi Arabia
| | | | | | | | - Abduladheem Turki Jalil
- Medical Laboratories Techniques Department, Al-Mustaqbal University College, Babylon, Hilla, 51001, Iraq
| | - Fahad Alsaikhan
- College of Pharmacy, Prince Sattam Bin Abdulaziz University, Alkharj, Saudi Arabia.
| | - Jitendra Gupta
- Institute of Pharmaceutical Research, GLA University, Mathura, Pin Code 281406, U. P., India
| | - Andrés Alexis Ramírez-Coronel
- Azogues Campus Nursing Career, Health and Behavior Research Group (HBR), Psychometry and Ethology Laboratory, Catholic University of Cuenca, Ecuador; Epidemiology and Biostatistics Research Group, CES University, Colombia; Educational Statistics Research Group (GIEE), National University of Education, Ecuador
| | - Nahla A Tayyib
- Faculty of Nursing, Umm Al- Qura University, Makkah, Saudi Arabia
| | - Hu Peng
- Department of Emergency, Shanghai Tenth People's Hospital, Tongji University, Shanghai, 200072, China.
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6
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Hashemi M, Mirzaei S, Zandieh MA, Rezaei S, Amirabbas Kakavand, Dehghanpour A, Esmaeili N, Ghahremanzade A, Saebfar H, Heidari H, Salimimoghadam S, Taheriazam A, Entezari M, Ahn KS. Long non-coding RNAs (lncRNAs) in hepatocellular carcinoma progression: Biological functions and new therapeutic targets. PROGRESS IN BIOPHYSICS AND MOLECULAR BIOLOGY 2023; 177:207-228. [PMID: 36584761 DOI: 10.1016/j.pbiomolbio.2022.12.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 11/29/2022] [Accepted: 12/22/2022] [Indexed: 12/28/2022]
Abstract
Liver is an important organ in body that performs vital functions such as detoxification. Liver is susceptible to development of cancers, and hepatocellular carcinoma (HCC) is among them. 75-85% of liver cancer cases are related to HCC. Therefore, much attention has been directed towards understanding factors mediating HCC progression. LncRNAs are epigenetic factors with more than 200 nucleotides in length located in both nucleus and cytoplasm and they are promising candidates in cancer therapy. Directing studies towards understanding function of lncRNAs in HCC is of importance. LncRNAs regulate cell cycle progression and growth of HCC cells, and they can also induce/inhibit apoptosis in tumor cells. LncRNAs affect invasion and metastasis in HCC mainly by epithelial-mesenchymal transition (EMT) mechanism. Revealing the association between lncRNAs and downstream signaling pathways in HCC is discussed in the current manuscript. Infectious diseases can affect lncRNA expression in mediating HCC development and then, altered expression level of lncRNA is associated with drug resistance and radio-resistance. Biomarker application of lncRNAs and their role in prognosis and diagnosis of HCC are also discussed to pave the way for treatment of HCC patients.
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Affiliation(s)
- Mehrdad Hashemi
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Department of Genetics, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Sepideh Mirzaei
- Department of Biology, Faculty of Science, Islamic Azad University, Science and Research Branch, Tehran, Iran
| | - Mohammad Arad Zandieh
- Department of Food Hygiene and Quality Control, Division of Epidemiology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Sahar Rezaei
- Faculty of Veterinary Medicine, Islamic Azad University, Science and Research Branch, Tehran, Iran
| | - Amirabbas Kakavand
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Amir Dehghanpour
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Negin Esmaeili
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Azin Ghahremanzade
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran
| | - Hamidreza Saebfar
- European University Association, League of European Research Universities, University of Milan, Italy
| | - Hajar Heidari
- Department of Biomedical Sciences, School of Public Health University at Albany State University of New York, Albany, NY, 12208, USA
| | - Shokooh Salimimoghadam
- Department of Biochemistry and Molecular Biology, Faculty of Veterinary Medicine, Shahid Chamran University of Ahvaz, Ahvaz, Iran
| | - Afshin Taheriazam
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Department of Orthopedics, Faculty of Medicine, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| | - Maliheh Entezari
- Farhikhtegan Medical Convergence Sciences Research Center, Farhikhtegan Hospital Tehran Medical Sciences, Islamic Azad University, Tehran, Iran; Department of Genetics, Faculty of Advanced Science and Technology, Tehran Medical Sciences, Islamic Azad University, Tehran, Iran.
| | - Kwang Seok Ahn
- College of Korean Medicine, Kyung Hee University, Seoul, Republic of Korea.
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Zhu N, Chen X, Zhao J, Fang L, Yao Y, Zhou F, Tao L, Xu Q. Hypoxia-induced LINC00674 facilitates hepatocellular carcinoma progression by activating the NOX1/mTOR signaling pathway. J Cancer 2022; 13:3177-3188. [PMID: 36118523 PMCID: PMC9475361 DOI: 10.7150/jca.76458] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Accepted: 08/11/2022] [Indexed: 11/25/2022] Open
Abstract
The hypoxic tumor microenvironment, a fundamental feature of solid tumors, drives hepatocellular carcinoma (HCC) progression through regulating the transcriptional activities of protein-coding and noncoding genes. However, long noncoding RNA (lncRNA)-mediated HCC progression in hypoxic microenvironment remains largely unknown yet. In this study, we found that LINC00674 was upregulated under hypoxic conditions in a HIF-1-dependent manner, and the occupancy of HIF-1 to HRE of LINC00674 gene promoter was essential for its transcription. In addition, LINC00674 level was increased in HCC cell lines and tissues. Clinically, statistical analysis showed that LINC00674 expression was significantly associated with tumor size, venous infiltration, tumor stage and poor prognosis of HCC. Functionally, loss-of-function assays revealed that LINC00674 knockdown inhibited the migration, proliferation and invasion of HCC cells. Furthermore, LINC00674 silencing prominently repressed the mTOR signaling pathway. LINC00674 overexpression-enhanced HCC cell proliferation, migration and invasion were markedly abolished by an mTOR inhibitor rapamycin. NADPH oxidase 1 (NOX1) was positively regulated by LINC00674 in HCC cells. NOX1 knockdown markedly reversed LINC00674-upregulated the p-mTOR level and HCC cells' malignant behaviors. Finally, we found that LINC00674 knockdown attenuated the growth of HCC cells in vivo. Our finding demonstrated that LINC00674 was a new HIF-1 target gene, and hypoxia-induced LINC00674 exerted a pro-proliferative and pro-metastatic role in HCC, possibly by activating the NOX1/mTOR signaling pathway. This study suggested LINC00674 as a promising therapeutic target for HCC.
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Affiliation(s)
- Ning Zhu
- The Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou 310014, China
| | - Xiaohong Chen
- Department of Pediatrics, Central Hospital of Haining, Zhejiang Provincial People's Hospital Haining Hospital, Haining 314400, China
| | - Junjun Zhao
- The Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou 310014, China.,Graduate Department, Bengbu Medical College, Bengbu 233030, China
| | - Lijuan Fang
- Department of Laboratory, Hangzhou Ninth People's Hospital, Hangzhou 310014, China
| | - Yingmin Yao
- Department of Hepatobiliary Surgery, the First Affiliated Hospital of Xi'an Jiaotong University, Xi'an 710061, China
| | - Feifei Zhou
- Department of traditional Chinese Medicine, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou 310014, China
| | - Liang Tao
- Department of General Surgery, Central Hospital of Haining, Zhejiang Provincial People's Hospital Haining Hospital, Haining 314400, China
| | - Qiuran Xu
- The Key Laboratory of Tumor Molecular Diagnosis and Individualized Medicine of Zhejiang Province, Zhejiang Provincial People's Hospital, Affiliated People's Hospital, Hangzhou Medical College, Hangzhou 310014, China
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8
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Pan J, Hu Y, Yuan C, Wu Y, Zhu X. lncRNA NEAT1 promotes the proliferation and metastasis of hepatocellular carcinoma by regulating the FOXP3/PKM2 axis. Front Oncol 2022; 12:928022. [PMID: 36185217 PMCID: PMC9521570 DOI: 10.3389/fonc.2022.928022] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Accepted: 07/15/2022] [Indexed: 11/25/2022] Open
Abstract
Objective Hepatocellular carcinoma (HCC) is a malignant tumor. The occurrence of HCC is involved in the alteration of a variety of oncogenes or tumor suppressor genes, but the specific molecular mechanism remains unknown. This research proved the effects of long non-coding RNA NEAT1 (lncRNA NEAT1) on the viability, proliferation, migration, and invasion of hepatocellular carcinoma cells and explored the mechanism behind these effects. Methods NEAT1 in 97H and Huh7 cell lines was overexpressed or knocked down, respectively. The expression of FOXP3 and its target gene PKM2 was hinged on qRT-PCR and Western blot, respectively. RNA pulldown and RNA immunoprecipitation experiments were carried out to detect the interaction between NEAT1 and proteins. Finally, the effect of NEAT1 on the tumor volume of HCC was verified by animal experiments. Results A series of experiments have shown that NEAT1 knockdown can inhibit the viability, proliferation, migration, and invasion of HCC cells; NEAT1 can bind FOXP3 to promote PKM2 transcription; PKM2 knockdown can inhibit the viability, proliferation, migration, and invasion of HCC cells; and PKM2 knockdown reversed the function of NEAT1. Conclusion lncRNA NEAT1 can promote the malignant behavior of HCC cells, while silencing of NEAT1 can inhibit that behavior of HCC cells. Mechanically, NEAT1 promotes the transcriptional activation of PKM2 by binding FOXP3, and PKM2 knockout reverses the function of NEAT1.
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Affiliation(s)
- Junping Pan
- Department of Hepatobiliary Surgery, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Yingzhe Hu
- Department of Hepatobiliary Surgery, Nanjing Drum Tower Hospital Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Chenlu Yuan
- Department of Hepatobiliary Surgery, Nanjing Drum Tower Hospital Clinical College of Traditional Chinese and Western Medicine, Nanjing University of Chinese Medicine, Nanjing, China
| | - Yafu Wu
- Department of Hepatobiliary Surgery, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
| | - Xinhua Zhu
- Department of Hepatobiliary Surgery, Affiliated Drum Tower Hospital, Medical School of Nanjing University, Nanjing, China
- *Correspondence: Xinhua Zhu,
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The Long and the Short of It: NEAT1 and Cancer Cell Metabolism. Cancers (Basel) 2022; 14:cancers14184388. [PMID: 36139550 PMCID: PMC9497099 DOI: 10.3390/cancers14184388] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 09/05/2022] [Indexed: 11/17/2022] Open
Abstract
Simple Summary Altered metabolism is a hallmark of most cancers. The way that cancer cells regulate their energy production to fuel constant proliferation has been of interest with the hope that it may be exploited therapeutically. The long noncoding RNA, NEAT1, is often dysregulated in tumours. NEAT1 RNA can be transcribed as two isoforms with different lengths, with each variant responsible for different functions. This review explores how the isoforms contribute to cancer metabolism. Abstract The long noncoding RNA NEAT1 is known to be heavily dysregulated in many cancers. A single exon gene produces two isoforms, NEAT1_1 and NEAT1_2, through alternative 3′-end processing. As the longer isoform, NEAT1_2 is an essential scaffold for nuclear paraspeckle formation. It was previously thought that the short NEAT1_1 isoform only exists to keep the NEAT1 locus active for rapid paraspeckle formation. However, a recent glycolysis-enhancing function for NEAT1_1, contributing to cancer cell proliferation and the Warburg effect, has been demonstrated. Previous studies have mainly focused on quantifying total NEAT1 and NEAT1_2 expression levels. However, in light of the NEAT1_1 role in cancer cell metabolism, the contribution from specific NEAT1 isoforms is no longer clear. Here, the roles of NEAT1_1 and NEAT1_2 in metabolism and cancer progression are discussed.
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10
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Oxidative stress-induced endothelial cells-derived exosomes accelerate skin flap survival through Lnc NEAT1-mediated promotion of endothelial progenitor cell function. Stem Cell Res Ther 2022; 13:325. [PMID: 35850692 PMCID: PMC9290268 DOI: 10.1186/s13287-022-03013-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2022] [Accepted: 06/08/2022] [Indexed: 12/14/2022] Open
Abstract
Background Flap transplantation is commonly used in reconstructive surgery. A prerequisite for skin flap survival is sufficient blood supply. However, such approaches remain unclear. This study aimed to explore the underlying mechanisms of exosomes derived from human umbilical vascular endothelial cells (HUVECs) exposed to oxidative stress on endothelial progenitor cells (EPCs) and their subsequent influence on the survival of skin flaps. Methods HUVECs were treated with various concentrations of H2O2 to establish an oxidative stress model. To investigate the effects of H2O2-HUVEC-Exos and HUVEC-Exos, Cell Counting Kit-8, tube formation, invasion assays, and quantitative real-time polymerase chain reaction (qRT-PCR) were performed in EPCs. Microarray analysis was used to reveal the differentially expressed long non-coding RNAs (lncRNAs) in the H2O2-HUVEC-Exos and HUVEC-Exos. In addition, gene silencing and western blotting were employed to determine the mechanism behind lncRNA nuclear enrichment enriched transcript 1 (Lnc NEAT1) in EPCs. Further, a rat skin flap model was used to determine the role of the exosomes in skin flap survival in vivo. Results HUVECs were stimulated with 100 μmol/L H2O2 for 12 h to establish an oxidative stress model. H2O2-HUVEC-Exos promoted the proliferation, tube formation, and invasion of EPCs and remarkably increased skin flap survival compared to the HUVEC-Exos and control groups. Sequencing of exosome RNAs revealed that the Lnc NEAT1 level was dramatically increased in the H2O2-HUVEC-Exos, leading to activation of the Wnt/β-catenin signaling pathway. Comparatively, knockdown of Lnc NEAT1 in HUVEC-Exos and H2O2-HUVEC-Exos significantly inhibits the angiogenic capacity of EPCs, reduced the survival area of skin flap and downregulated the expression levels of Wnt/β-catenin signaling pathway proteins, whereas Wnt agonist partly reversed the negative effect of NEAT1 downregulation on EPCs through the Wnt/β-catenin signaling pathway. Conclusions Exosomes derived from HUVECs stimulated by oxidative stress significantly promoted the pro-angiogenic ability of EPCs through the Wnt/β-catenin signaling pathway mediated by Lnc NEAT1 and hence enhanced random flap survival in vivo. Therefore, the application of H2O2-HUVEC-Exos may serve as an alternative therapy for improving random skin flap survival. Supplementary Information The online version contains supplementary material available at 10.1186/s13287-022-03013-9.
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Sirtuins and Hypoxia in EMT Control. Pharmaceuticals (Basel) 2022; 15:ph15060737. [PMID: 35745656 PMCID: PMC9228842 DOI: 10.3390/ph15060737] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2021] [Revised: 05/25/2022] [Accepted: 06/08/2022] [Indexed: 02/06/2023] Open
Abstract
Epithelial–mesenchymal transition (EMT), a physiological process during embryogenesis, can become pathological in the presence of different driving forces. Reduced oxygen tension or hypoxia is one of these forces, triggering a large number of molecular pathways with aberrant EMT induction, resulting in cancer and fibrosis onset. Both hypoxia-induced factors, HIF-1α and HIF-2α, act as master transcription factors implicated in EMT. On the other hand, hypoxia-dependent HIF-independent EMT has also been described. Recently, a new class of seven proteins with deacylase activity, called sirtuins, have been implicated in the control of both hypoxia responses, HIF-1α and HIF-2α activation, as well as EMT induction. Intriguingly, different sirtuins have different effects on hypoxia and EMT, acting as either activators or inhibitors, depending on the tissue and cell type. Interestingly, sirtuins and HIF can be activated or inhibited with natural or synthetic molecules. Moreover, recent studies have shown that these natural or synthetic molecules can be better conveyed using nanoparticles, representing a valid strategy for EMT modulation. The following review, by detailing the aspects listed above, summarizes the interplay between hypoxia, sirtuins, and EMT, as well as the possible strategies to modulate them by using a nanoparticle-based approach.
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Song H, Huang XF, Hu SY, Lu LL, Yang XY. The LINC00261/MiR105-5p/SELL axis is involved in dysfunction of B cell and is associated with overall survival in hepatocellular carcinoma. PeerJ 2022; 10:e12588. [PMID: 35702258 PMCID: PMC9188773 DOI: 10.7717/peerj.12588] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 11/11/2021] [Indexed: 01/11/2023] Open
Abstract
Background Previous studies have been reported the immune dysfunction of various live tissues. However, the potential molecular mechanism of post-transcriptional regulation of immune related genes in hepatocellular carcinoma (HCC) is still not clear. We tried to identify crucial immune related biomarkers associated with HCC patients' outcomes and to reveal the transcriptional regulation. Method The fractions of 22 immune cells in tumor and adjacent tissues were estimated by CIBERSORT. Kruskal-Wallis test and differentially expressed analyzes were used for comparative studies. Cox proportional hazard regression model, Kaplan-Meier estimates and Log-rank test were used for survival analyses. Results From The Cancer Genome Atlas (TCGA), the gene, lncRNA and miRNA expression profiles of 379 HCC samples with clinical information were used for comparative studies. Eleven adaptive and innate immune cell types were significantly altered in HCC samples, including B cell memory, regulatory T cells and follicular helper T cells. Differentially expressed competing endogenous RNA (ceRNA) network associated with patients' overall survival was identified. Then, the novel pathway, including LINC00261, MiR105-5p and selectin L(SELL) was found and may be potential novel biomarkers for patients' outcomes and immunotherapy. Furthermore, SELL was significantly positively correlated (correlation coefficients: 0.47-0.69) with 12 known gene signatures of immunotherapy except for programmed cell death 1 (PDCD1). Conclusions Our findings could provide insights into the selection of novel LINC00261/MiR105-5p/SELL pathway which is associated with overall survival and may impact on efficacy of immunotherapy in HCC.
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Affiliation(s)
- Hao Song
- Department of Organ Transplantation, Shanghai Eastern Hepatobiliary Surgery Hospital, Shanghai, China
| | - Xing-Feng Huang
- Department of Organ Transplantation, Shanghai Eastern Hepatobiliary Surgery Hospital, Shanghai, China
| | - Shu-yang Hu
- Department of Organ Transplantation, Shanghai Eastern Hepatobiliary Surgery Hospital, Shanghai, China
| | | | - Xiao-Yu Yang
- Department of Organ Transplantation, Shanghai Eastern Hepatobiliary Surgery Hospital, Shanghai, China
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Liang JH, Xu QD, Gu SG. LncRNA RSU1P2-microRNA let-7a-Testis-Expressed Protein 10 axis modulates tumorigenesis and cancer stem cell-like properties in liver cancer. Bioengineered 2022; 13:4285-4300. [PMID: 35156514 PMCID: PMC8974045 DOI: 10.1080/21655979.2022.2031394] [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: 10/27/2021] [Revised: 01/05/2022] [Accepted: 01/11/2022] [Indexed: 02/05/2023] Open
Abstract
LncRNAs exert important functions in the modulation of tumorigenesis and cancer stem cell-like properties in liver cancer. However, the role of LncRNA Ras suppressor protein 1 pseudogene 2 (RSU1P2) in modulating tumorigenesis and cancer stem cell-like properties in liver cancer is still not known. In this study, the expression of LncRNA RSU1P2 was significantly elevated in liver cancer tissues and cells. Besides, knockdown of RSU1P2 repressed cell viability, invasion, epithelial-mesenchymal transition (EMT) of liver cancer cells and the expressions of cancer stem cell-related genes, whereas facilitated the apoptosis of liver cancer cells. In addition, LncRNA RSU1P2 can interact with microRNA let-7a (let-7a), and repress let-7a expression. Testis-Expressed Protein 10 (Tex10) was identified to be a target of let-7a, and let-7a repressed Tex10 expression. Finally, RSU1P2 knockdown suppressed tumor volume, tumor weight, and EMT in a xenograft model. Therefore, LncRNA RSU1P2 promotes tumorigenesis and cancer stem cell-like properties in liver cancer through let-7a/Tex10 pathway.
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Affiliation(s)
- Jia-Hong Liang
- Department of Biliary-Pancreatic Minimally Invasive Surgery, The First Affiliated Hospital of Shantou University Medical College, Shantou, China
| | - Qiao-Dong Xu
- Department of Biliary-Pancreatic Minimally Invasive Surgery, The First Affiliated Hospital of Shantou University Medical College, Shantou, China
| | - Song-Gang Gu
- Department of Hepatobiliary surgery, Cancer Hospital of Shantou University Medical College, Shantou, China
- CONTACT Song-Gang Gu Department of Hepatobiliary surgery, Cancer Hospital of Shantou University Medical College, ShantouChina
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14
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Si L, Yang Z, Ding L, Zhang D. Regulatory effects of lncRNAs and miRNAs on the crosstalk between autophagy and EMT in cancer: a new era for cancer treatment. J Cancer Res Clin Oncol 2022; 148:547-564. [PMID: 35083552 DOI: 10.1007/s00432-021-03892-0] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2021] [Accepted: 12/15/2021] [Indexed: 02/07/2023]
Abstract
PURPOSE Autophagy and EMT (epithelial-mesenchymal transition) are the two principal biological processes and ideal therapeutic targets during cancer development. Autophagy, a highly conserved process for degrading dysfunctional cellular components, plays a dual role in tumors depending on the tumor stage and tissue types. The EMT process is the transition differentiation from an epithelial cell to a mesenchymal-like cell and acquiring metastatic potential. There is evidence that the crosstalk between autophagy and EMT is complex in cancer. In recent years, more studies have shown that long non-coding RNAs (lncRNAs) and microRNAs (miRNAs) are involved in autophagy, EMT, and their crosstalk. Therefore, accurate understanding of the regulatory mechanisms of lncRNAs and miRNAs in autophagy, EMT and their interactions is crucial for the clinical management of cancers. METHODS An extensive literature search was conducted on the Google Scholar and PubMed databases. The keywords used for the search included: autophagy, EMT, crosstalk, lncRNAs, miRNAs, cancers, diagnostic biomarkers, and therapeutic targets. This search provided relevant articles published in peer-reviewed journals until 2021. Data from these various studies were extracted and used in this review. RESULTS The results showed that lncRNAs/miRNAs as tumor inhibitors or tumor inducers could regulate autophagy, EMT, and their interaction by regulating several molecular signaling pathways. The lncRNAs/miRNAs involved in autophagy and EMT processes could have potential uses in cancer diagnosis, prognosis, and therapy. CONCLUSION Such information could help find and develop lncRNAs/miRNAs based new tools for diagnosing, prognosis, and creating anti-cancer therapies.
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Affiliation(s)
- Lihui Si
- Department of Obstetrics and Gynecology, The Second Hospital of Jilin University, Changchun, 130000, China
| | - Zecheng Yang
- Department of Gastrointestinal Surgery, The Second Hospital of Jilin University, Changchun, 130000, China.
| | - Lu Ding
- Department of Gastrointestinal Surgery, The Second Hospital of Jilin University, Changchun, 130000, China
| | - Duoduo Zhang
- Department of Thoracic Surgery, The First Hospital of Jilin University, Changchun, 130000, Jilin Province, China
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15
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Yao J, Du Y, Liu J, Gareev I, Yang G, Kang X, Wang X, Beylerli O, Chen X. Hypoxia related long non-coding RNAs in ischemic stroke. Noncoding RNA Res 2021; 6:153-158. [PMID: 34703955 PMCID: PMC8511691 DOI: 10.1016/j.ncrna.2021.10.001] [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: 09/09/2021] [Revised: 10/02/2021] [Accepted: 10/02/2021] [Indexed: 12/22/2022] Open
Abstract
With high rates of mortality and disability, stroke has caused huge social burden, and 85% of which is ischemic stroke. In recent years, it is a progressive discovery of long non-coding RNA (lncRNA) playing an important regulatory role throughout ischemic stroke. Hypoxia, generated from reduction or interruption of cerebral blood flow, leads to changes in lncRNA expression, which then influence disease progression. Therefore, we reviewed studies on expression of hypoxia-related lncRNAs and relevant molecular mechanism in ischemic stroke. Considering that hypoxia-inducible factor (HIF) is a crucial regulator in hypoxic progress, we mainly focus on the HIF-related lncRNA which regulates the expression of HIF or is regulated by HIF, further reveal their pathogenesis and adaption after brain ischemia and hypoxia, so as to find effective biomarker and therapeutic targets.
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Affiliation(s)
- Jiawei Yao
- Department of Neurosurgery, First Affiliated Hospital of Harbin Medical University, Harbin, 150001, Heilongjiang Province, China.,Institute of Neuroscience, Sino-Russian Medical Research Center, Harbin Medical University, Harbin, 150001, Heilongjiang Province, China
| | - Yiming Du
- Department of Neurosurgery, First Affiliated Hospital of Harbin Medical University, Harbin, 150001, Heilongjiang Province, China.,Institute of Neuroscience, Sino-Russian Medical Research Center, Harbin Medical University, Harbin, 150001, Heilongjiang Province, China
| | - Junsi Liu
- Department of Neurosurgery, First Affiliated Hospital of Harbin Medical University, Harbin, 150001, Heilongjiang Province, China.,Institute of Neuroscience, Sino-Russian Medical Research Center, Harbin Medical University, Harbin, 150001, Heilongjiang Province, China
| | - Ilgiz Gareev
- Bashkir State Medical University, Ufa, Republic of Bashkortostan, 450008, Russia
| | - Guang Yang
- Department of Neurosurgery, First Affiliated Hospital of Harbin Medical University, Harbin, 150001, Heilongjiang Province, China.,Institute of Neuroscience, Sino-Russian Medical Research Center, Harbin Medical University, Harbin, 150001, Heilongjiang Province, China
| | - Xiaohui Kang
- Department of Pharmacy, Rizhao People's Hospital, Rizhao, 276826, Shandong Province, China
| | - Xiaoxiong Wang
- Department of Neurosurgery, First Affiliated Hospital of Harbin Medical University, Harbin, 150001, Heilongjiang Province, China.,Institute of Neuroscience, Sino-Russian Medical Research Center, Harbin Medical University, Harbin, 150001, Heilongjiang Province, China
| | - Ozal Beylerli
- Bashkir State Medical University, Ufa, Republic of Bashkortostan, 450008, Russia
| | - Xin Chen
- Department of Neurosurgery, First Affiliated Hospital of Harbin Medical University, Harbin, 150001, Heilongjiang Province, China.,Institute of Neuroscience, Sino-Russian Medical Research Center, Harbin Medical University, Harbin, 150001, Heilongjiang Province, China
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Foglia B, Sutti S, Cannito S, Rosso C, Maggiora M, Autelli R, Novo E, Bocca C, Villano G, Ramavath NN, Younes R, Tusa I, Rovida E, Pontisso P, Bugianesi E, Albano E, Parola M. Hepatocyte-Specific Deletion of HIF2α Prevents NASH-Related Liver Carcinogenesis by Decreasing Cancer Cell Proliferation. Cell Mol Gastroenterol Hepatol 2021; 13:459-482. [PMID: 34655812 PMCID: PMC8688724 DOI: 10.1016/j.jcmgh.2021.10.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Revised: 10/06/2021] [Accepted: 10/06/2021] [Indexed: 12/28/2022]
Abstract
BACKGROUND & AIMS Hypoxia and hypoxia-inducible factors (HIFs) are involved in chronic liver disease progression. We previously showed that hepatocyte HIF-2α activation contributed significantly to nonalcoholic fatty liver disease progression in experimental animals and human patients. In this study, using an appropriate genetic murine model, we mechanistically investigated the involvement of hepatocyte HIF-2α in experimental nonalcoholic steatohepatitis (NASH)-related carcinogenesis. METHODS The role of HIF-2α was investigated by morphologic, cellular, and molecular biology approaches in the following: (1) mice carrying hepatocyte-specific deletion of HIF-2α (HIF-2α-/- mice) undergoing a NASH-related protocol of hepatocarcinogenesis; (2) HepG2 cells stably transfected to overexpress HIF-2α; and (3) liver specimens from NASH patients with hepatocellular carcinoma. RESULTS Mice carrying hepatocyte-specific deletion of HIF-2α (hHIF-2α-/-) showed a significant decrease in the volume and number of liver tumors compared with wild-type littermates. These effects did not involve HIF-1α changes and were associated with a decrease of cell proliferation markers proliferating cell nuclear antigen and Ki67. In both human and rodent nonalcoholic fatty liver disease-related tumors, HIF-2α levels were strictly associated with hepatocyte production of SerpinB3, a mediator previously shown to stimulate liver cancer cell proliferation through the Hippo/Yes-associated protein (YAP)/c-Myc pathway. Consistently, we observed positive correlations between the transcripts of HIF-2α, YAP, and c-Myc in individual hepatocellular carcinoma tumor masses, while HIF-2α deletion down-modulated c-Myc and YAP expression without affecting extracellular signal-regulated kinase 1/2, c-Jun N-terminal kinase, and AKT-dependent signaling. In vitro data confirmed that HIF-2α overexpression induced HepG2 cell proliferation through YAP-mediated mechanisms. CONCLUSIONS These results indicate that the activation of HIF-2α in hepatocytes has a critical role in liver carcinogenesis during NASH progression, suggesting that HIF-2α-blocking agents may serve as novel putative therapeutic tools.
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Affiliation(s)
- Beatrice Foglia
- Unit of Experimental Medicine and Clinical Pathology, Department of Clinical and Biological Sciences, University of Turin, Italy
| | - Salvatore Sutti
- Department of Health Sciences and Interdisciplinary Research Centre for Autoimmune Diseases, University Amedeo Avogadro of East Piedmont, Novara, Italy
| | - Stefania Cannito
- Unit of Experimental Medicine and Clinical Pathology, Department of Clinical and Biological Sciences, University of Turin, Italy
| | - Chiara Rosso
- Department of Medical Sciences, University of Turin, Torino, Italy; Division of Gastroenterology, San Giovanni Hospital, Torino, Italy
| | - Marina Maggiora
- Unit of Experimental Medicine and Clinical Pathology, Department of Clinical and Biological Sciences, University of Turin, Italy
| | - Riccardo Autelli
- Unit of Experimental Medicine and Clinical Pathology, Department of Clinical and Biological Sciences, University of Turin, Italy
| | - Erica Novo
- Unit of Experimental Medicine and Clinical Pathology, Department of Clinical and Biological Sciences, University of Turin, Italy
| | - Claudia Bocca
- Unit of Experimental Medicine and Clinical Pathology, Department of Clinical and Biological Sciences, University of Turin, Italy
| | | | - Naresh Naik Ramavath
- Department of Health Sciences and Interdisciplinary Research Centre for Autoimmune Diseases, University Amedeo Avogadro of East Piedmont, Novara, Italy
| | - Ramy Younes
- Department of Medical Sciences, University of Turin, Torino, Italy; Division of Gastroenterology, San Giovanni Hospital, Torino, Italy
| | - Ignazia Tusa
- Unit of Experimental Oncology and Pathology, Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
| | - Elisabetta Rovida
- Unit of Experimental Oncology and Pathology, Department of Experimental and Clinical Biomedical Sciences, University of Florence, Florence, Italy
| | | | - Elisabetta Bugianesi
- Department of Medical Sciences, University of Turin, Torino, Italy; Division of Gastroenterology, San Giovanni Hospital, Torino, Italy
| | - Emanuele Albano
- Department of Health Sciences and Interdisciplinary Research Centre for Autoimmune Diseases, University Amedeo Avogadro of East Piedmont, Novara, Italy
| | - Maurizio Parola
- Unit of Experimental Medicine and Clinical Pathology, Department of Clinical and Biological Sciences, University of Turin, Italy.
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Gao Z, Shi Y, Wang J, Li W, Bao Y, Wu D, Gu Y. Long non-coding RNA NEAT1 absorbs let-7 g-5p to induce epithelial-mesenchymal transition of colon cancer cells through upregulating BACH1. Dig Liver Dis 2021:S1590-8658(21)00216-4. [PMID: 34238666 DOI: 10.1016/j.dld.2021.04.031] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/17/2020] [Revised: 04/26/2021] [Accepted: 04/26/2021] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Long noncoding RNAs (lncRNAs) are critical regulators in diverse human cancers. However, the role of lncRNA nuclear paraspeckle assembly transcript 1 (NEAT1) in colon cancer remains to be further investigated. We aimed to verify the role of NEAT1/let-7 g-5p/BTB and CNC homology 1 (BACH1) axis in colon cancer development. METHODS Expression of NEAT1, let-7 g-5p and BACH1 in colon cancer tissues and cells was determined. The interactions between NEAT1 and let-7 g-5p, and between let-7 g-5p and BACH1 were assessed. The colon cancer cell lines were treated with plasmids or oligonucleotides to alter NEAT1, BACH1 and let-7 g-5p expression. Then, viability, migration, invasion, and apoptosis of colon cells were evaluated, and the cell growth in vivo was observed as well. RESULTS NEAT1 and BACH1 were upregulated while let-7 g-5p was downregulated in colon cancer tissues and cells. NEAT1/BACH1 silencing or let-7 g-5p elevation suppressed colon cancer cell growth in vivo and in vitro. The effects of silenced NEAT1 on colon cancer cells and xenografts were reversed by downregulating let-7 g-5p. Down-regulation of BACH1 reversed the effect of NEAT1 overexpression on colon cancer cells. NEAT1 directly bound to let-7 g-5p and let-7 g-5p targeted BACH1. CONCLUSION Downregulated NEAT1 elevated let-7 g-5p to suppress EMT of colon cancer cells through inhibiting BACH1. This research may contribute to treatment of colon cancer.
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Affiliation(s)
- Zhenzhen Gao
- Department of Oncology, The Second Affiliated Hospital of Jiaxing University, Jiaxing 314000, zhejiang Province, China; Department of Oncology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
| | - Yu Shi
- Department of Radiotherapy, Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu Province, China
| | - Jiawei Wang
- Department of Oncology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
| | - Wei Li
- Department of Oncology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
| | - Yi Bao
- Department of Oncology, The Second Affiliated Hospital of Jiaxing University, Jiaxing 314000, zhejiang Province, China
| | - Dongjuan Wu
- Department of Oncology, The Second Affiliated Hospital of Jiaxing University, Jiaxing 314000, zhejiang Province, China
| | - Yanhong Gu
- Department of Oncology, First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, China.
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Mu JY, Tian JX, Chen YJ. lncRNA RBM5-AS1 promotes cell proliferation and invasion by epigenetically silencing miR-132/212 in hepatocellular carcinoma cells. Cell Biol Int 2021; 45:2201-2210. [PMID: 34019714 DOI: 10.1002/cbin.11649] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2021] [Revised: 04/20/2021] [Accepted: 05/16/2021] [Indexed: 01/13/2023]
Abstract
Hepatocellular carcinoma (HCC) is regarded as one of the most common malignancies worldwide leading to cancer-related death. Long noncoding RNAs (lncRNAs) are a critical modulator affecting HCC progression. Whereas, the pathogenesis of lncRNA RBM5-AS1 in the development of HCC remains unclear. Quantitative RT-PCR or western blot assays were applied to detect the expression of genes and proteins, respectively. The proliferation and metastasis abilities were assessed using Cell counting kit-8 (CCK-8), EdU and transwell assays. RNA immunoprecipitation (RIP) experiment was employed to validate the molecular interactions. RBM5-AS1 is highly expressed in HCC tissues and cell lines, especially in Hep3B and HepG2 cells. RBM5-AS1 knockdown dramatically restrains cell proliferation, invasion and migration of HCC cells. Importantly, RBM5-AS1 acts as an epigenetic regulator to elevate the H3K27me3 level of miR-132/212 promoter regions via recruiting PRC2 (EZH2, SUZ12, EED), and eventually reducing miR-132/212 expressions. The recovery experiments demonstrated that downregulation of miR-132/212 markedly eliminate the antitumor effects mediated by RBM5-AS1 silencing in HCC cells. The data of this work illustrate that RBM5-AS1 acts as an epigenetic regulator to promote the HCC progression by repressing miR-132/212 expressions, which would provide a new insight for understanding the action mechanism of RBM5-AS1 in HCC development.
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Affiliation(s)
- Jin-Yong Mu
- Department of Clinical Laboratory, Shidao People's Hospltal of Rongcheng, Rongcheng, Shandong, China
| | - Jun-Xiu Tian
- Department of Clinical Laboratory, The Fourth People's Hospital of Zibo City, Zibo, Shandong, China
| | - Ying-Jie Chen
- Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, Shandong, China
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Wang P, Li QY, Sun YN, Wang JT, Liu M. Long Noncoding RNA NEAT1: A Potential Biomarker in the Progression of Laryngeal Squamous Cell Carcinoma. ORL J Otorhinolaryngol Relat Spec 2021; 83:464-470. [PMID: 33831864 DOI: 10.1159/000515228] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Accepted: 02/12/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Laryngeal squamous cell carcinoma (LSCC) is diverse in its natural history and responsiveness to treatments. There is an urgent need to generate candidate biomarkers for the stratification and individualization of treatment to avoid overtreatment or inadequate treatment. Long noncoding RNA nuclear paraspeckle assembly transcript 1 (NEAT1) has been identified as an oncogenic gene in multiple human tumors entitles, and dysregulation of NEAT1 was tightly linked to carcinogenesis and cancer progression. METHODS One hundred two paraffin samples of LSCC patients were collected. Furthermore, in situ hybridization (ISH), Kaplan-Meier, and MTT were used to analyze the relationship between NEAT1 and the progress of LSCC. RESULTS In this study, ISH revealed that NEAT1 was strongly expressed in the nucleus. The increased expression of NEAT1 was correlated with T grade, neck nodal metastasis, clinical stage, drinking history, or smoking history of LSCC. The Kaplan-Meier analysis indicated that patients with higher NEAT1 expression had a worse overall survival in LSCC patients. In addition, NEAT1 knockdown significantly inhibited the growth of LSCC cells. CONCLUSION Together, these results suggested that NEAT1 involved in the progress of LSCC and might act as a tumor oncogenic gene. This study provides a potential new marker and target for gene therapy in the treatment of LSCC.
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Affiliation(s)
- Peng Wang
- Department of Otorhinolaryngology, Head and Neck Surgery, The Second Affiliated Hospital, Harbin Medical University, 150086, Harbin, China
| | - Qiu-Ying Li
- Department of Otorhinolaryngology, Head and Neck Surgery, The Second Affiliated Hospital, Harbin Medical University, 150086, Harbin, China
| | - Ya-Nan Sun
- Department of Otorhinolaryngology, Head and Neck Surgery, The Second Affiliated Hospital, Harbin Medical University, 150086, Harbin, China
| | - Jing-Ting Wang
- Department of Otorhinolaryngology, Head and Neck Surgery, The Second Affiliated Hospital, Harbin Medical University, 150086, Harbin, China
| | - Ming Liu
- Department of Otorhinolaryngology, Head and Neck Surgery, The Second Affiliated Hospital, Harbin Medical University, 150086, Harbin, China
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Kong D, Long D, Liu B, Pei D, Cao N, Zhang G, Xia Z, Luo M. Downregulation of long non-coding RNA LOC101928477 correlates with tumor progression by regulating the epithelial-mesenchymal transition in esophageal squamous cell carcinoma. Thorac Cancer 2021; 12:1303-1311. [PMID: 33713583 PMCID: PMC8088935 DOI: 10.1111/1759-7714.13858] [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: 12/02/2020] [Revised: 01/09/2021] [Accepted: 01/09/2021] [Indexed: 02/07/2023] Open
Abstract
Background Esophageal squamous cell carcinoma (ESCC) is one of the deadliest malignancies. There is a growing body of evidence showing that long non‐coding RNAs (lncRNAs) play critical roles in ESCC oncogenesis. The present study aimed to explore the role of LOC101928477, a newly discovered lncRNA, in the development and metastasis of ESCC. Methods In this study, real‐time PCR, western blotting, cell counting kit‐8 (CCK‐8), flow cytometry, colony formation, wound healing, transwell migration/invasion assay, immunofluorescence, and immunohistochemistry were used. We also applied an in situ xenograft mouse model and a lung metastasis mouse model to verify our findings. Results We determined that LOC101928477 expression was inhibited in ESCC tissue and ESCC cell lines when compared with controls. Moreover, forced expression of LOC101928477 effectively inhibited ESCC cell proliferation, colony formation, migration, and invasion via suppression of epithelial‐mesenchymal transition (EMT). Furthermore, LOC101928477 overexpression inhibited in situ tumor growth and lung metastasis in a mouse model. Conclusions Together, our results suggested that LOC101928477 could be a novel suppressor gene involved in ESCC progression.
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Affiliation(s)
- Demiao Kong
- Department of Thoracic Surgery, Guizhou Provincial People's Hospital, Guiyang, China
| | - Dali Long
- Department of Intensive Care Unit, Guizhou Provincial People's Hospital, Guiyang, China
| | - Bo Liu
- Department of Thoracic Surgery, Guizhou Provincial People's Hospital, Guiyang, China
| | - Dengke Pei
- Department of Thoracic Surgery, Guizhou Provincial People's Hospital, Guiyang, China
| | - Na Cao
- Department of Logistics, Guizhou Provincial People's Hospital, Guizhou, Guiyang, China
| | - Guihua Zhang
- Department of Thoracic Surgery, Guizhou Provincial People's Hospital, Guiyang, China
| | - Zhenkun Xia
- Department of Thoracic Surgery, Guizhou Provincial People's Hospital, Guiyang, China
| | - Meng Luo
- Department of Thoracic Surgery, Guizhou Provincial People's Hospital, Guiyang, China
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Dai W, Wang M, Wang P, Wen J, Wang J, Cha S, Xiao X, He Y, Shu R, Bai D. lncRNA NEAT1 ameliorates LPS‑induced inflammation in MG63 cells by activating autophagy and suppressing the NLRP3 inflammasome. Int J Mol Med 2021; 47:607-620. [PMID: 33416115 PMCID: PMC7797466 DOI: 10.3892/ijmm.2020.4827] [Citation(s) in RCA: 40] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2020] [Accepted: 11/19/2020] [Indexed: 02/05/2023] Open
Abstract
The mechanisms of inflammation in bone and joint tissue are complex and involve long non‑coding RNAs (lncRNAs), which play an important role in this process. The aim of the present study was to screen out differentially expressed genes in human osteoblasts stimulated by inflammation, and to further explore the mechanisms underlying inflammatory responses and the functional activity of human osteoblasts through bioinformatics methods and in vitro experiments. For this purpose, MG63 cells were stimulated with various concentrations of lipopolysaccharide (LPS) for different periods of time to construct an optimal inflammatory model and RNA sequencing was then performed on these cells. The levels of nuclear enriched abundant transcript 1 (NEAT1), various inflammatory factors, Nod‑like receptor protein 3 (NLRP3) protein and osteogenesis‑related proteins, as well as the levels of cell apoptosis‑ and cell cycle‑related markers were measured in MG63 cells stimulated with LPS, transfected with NEAT1 overexpression plasmid and treated with bexarotene by western blot analysis, RT‑qPCR, immunofluorescence, FISH, TEM and flow cytometry. There were 427 differentially expressed genes in the LPS‑stimulated MG63 cells, in which NEAT1 was significantly downregulated. LPS upregulated the expression of inflammatory cytokines and NLRP3, inhibited the expression of autophagy‑related and osteogenesis‑related proteins, promoted apoptosis and altered the cell cycle, which was partially inhibited by NEAT1 overexpression and promoted by bexarotene. LPS stimulated inflammation in the MG63 cells and inhibited the retinoid X receptor (RXR)‑α to downregulate the expression of NEAT1 and decrease levels of autophagy, which promoted the activation of NLRP3 and the release of inflammatory factors, and impaired the functional activity of osteoblasts, thus promoting the development of inflammation.
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Affiliation(s)
- Wenyu Dai
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, Department of Orthodontics and Pediatrics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041
| | - Manyi Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, Department of Orthodontics and Pediatrics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041
- Stomatological Hospital, Southern Medical University, Guangzhou, Guangdong 510599, P.R. China
| | - Peiqi Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, Department of Orthodontics and Pediatrics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041
| | - Ji Wen
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, Department of Orthodontics and Pediatrics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041
| | - Jiangyue Wang
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, Department of Orthodontics and Pediatrics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041
| | - Sa Cha
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, Department of Orthodontics and Pediatrics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041
| | - Xueling Xiao
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, Department of Orthodontics and Pediatrics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041
| | - Yiruo He
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, Department of Orthodontics and Pediatrics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041
| | - Rui Shu
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, Department of Orthodontics and Pediatrics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041
| | - Ding Bai
- State Key Laboratory of Oral Diseases, National Clinical Research Center for Oral Disease, Department of Orthodontics and Pediatrics, West China Hospital of Stomatology, Sichuan University, Chengdu, Sichuan 610041
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22
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Garcia-Lezana T, Lopez-Canovas JL, Villanueva A. Signaling pathways in hepatocellular carcinoma. Adv Cancer Res 2020; 149:63-101. [PMID: 33579428 DOI: 10.1016/bs.acr.2020.10.002] [Citation(s) in RCA: 51] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Despite the recent introduction of new effective systemic agents, the survival of patients with hepatocellular carcinoma (HCC) at advanced stages remains dismal. This underscores the need for new therapies, which has spurred extensive research on the identification of the main drivers of pathway de-regulation as a source of novel therapeutic targets. Frequently altered pathways in HCC involve growth factor receptors (e.g., VEGFR, FGFR, TGFA, EGFR, IGFR) and/or its cytoplasmic intermediates (e.g., PI3K-AKT-mTOR, RAF/ERK/MAPK) as well as key pathways in cell differentiation (e.g., Wnt/β-catenin, JAK/STAT, Hippo, Hedgehog, Notch). Somatic mutations, chromosomal aberrations and epigenetic changes are common mechanisms for pathway deregulation in HCC. Aberrant pathway activation has also been explored as a biomarker to predict response to specific therapies, but currently, these strategies are not implemented when deciding systemic therapies in HCC patients. Beyond the well-established molecular cascades, there are numerous emerging signaling pathways also deregulated in HCC (e.g., tumor microenvironment, non-coding RNA, intestinal microbiota), which have opened new avenues for therapeutic exploration.
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Affiliation(s)
- Teresa Garcia-Lezana
- Division of Liver Diseases, Liver Cancer Program, Department of Medicine, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, United States
| | - Juan Luis Lopez-Canovas
- Department of Cell Biology, Physiology and Immunology, Maimonides Institute of Biomedical Research of Córdoba (IMIBIC), University of Córdoba, Córdoba, Spain
| | - Augusto Villanueva
- Division of Liver Diseases, Liver Cancer Program, Department of Medicine, Tisch Cancer Institute, Icahn School of Medicine at Mount Sinai, New York, NY, United States; Division of Hematology and Medical Oncology, Department of Medicine, Icahn School of Medicine at Mount Sinai, New York, NY, United States.
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23
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Bu FT, Wang A, Zhu Y, You HM, Zhang YF, Meng XM, Huang C, Li J. LncRNA NEAT1: Shedding light on mechanisms and opportunities in liver diseases. Liver Int 2020; 40:2612-2626. [PMID: 32745314 DOI: 10.1111/liv.14629] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/27/2020] [Revised: 07/10/2020] [Accepted: 07/26/2020] [Indexed: 12/24/2022]
Abstract
With advances in genome and transcriptome research technology, the function and mechanism of lncRNAs in physiological and pathological states have been gradually revealed. Nuclear Enriched Abundant Transcript 1 (NEAT1, a long non-coding RNA), a vital component of paraspeckles, plays an indispensable role in the formation and integrity of paraspeckles. Throughout the research history, NEAT1 is mostly aberrantly upregulated in various cancers, and high expression of NEAT1 often contributes to poor prognosis of patients. Notably, the role and mechanism of NEAT1 in liver diseases have been increasingly reported. NEAT1 accelerates the progression of non-alcoholic fatty liver disease (NAFLD), liver fibrosis and hepatocellular carcinoma, while exerting a protective role in the pathogenesis of acute-on-chronic liver failure by inhibiting the inflammatory response. In this review, we will elaborate on relevant studies on the different casting of NEAT1 in liver diseases, especially focusing on its regulatory mechanisms and new opportunities for alcoholic liver disease.
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Affiliation(s)
- Fang-Tian Bu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China.,The Key Laboratory of Anti-Inflammatory of Immune Medicines, Ministry of Education, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Hefei, China
| | - Ao Wang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China.,The Key Laboratory of Anti-Inflammatory of Immune Medicines, Ministry of Education, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Hefei, China
| | - Yan Zhu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China.,The Key Laboratory of Anti-Inflammatory of Immune Medicines, Ministry of Education, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Hefei, China
| | - Hong-Mei You
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China.,The Key Laboratory of Anti-Inflammatory of Immune Medicines, Ministry of Education, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Hefei, China
| | - Ya-Fei Zhang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China.,The Key Laboratory of Anti-Inflammatory of Immune Medicines, Ministry of Education, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Hefei, China
| | - Xiao-Ming Meng
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China.,The Key Laboratory of Anti-Inflammatory of Immune Medicines, Ministry of Education, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Hefei, China
| | - Cheng Huang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China.,The Key Laboratory of Anti-Inflammatory of Immune Medicines, Ministry of Education, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Hefei, China
| | - Jun Li
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, Hefei, China.,The Key Laboratory of Anti-Inflammatory of Immune Medicines, Ministry of Education, Hefei, China.,Institute for Liver Diseases of Anhui Medical University, Hefei, China
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24
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Luo M, Zhang L, Yang H, Luo K, Qing C. Long non‑coding RNA NEAT1 promotes ovarian cancer cell invasion and migration by interacting with miR‑1321 and regulating tight junction protein 3 expression. Mol Med Rep 2020; 22:3429-3439. [PMID: 32945443 PMCID: PMC7453588 DOI: 10.3892/mmr.2020.11428] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2020] [Accepted: 06/17/2020] [Indexed: 12/13/2022] Open
Abstract
Previous studies have reported that long non‑coding RNAs (lncRNAs) have a significant role in the metastasis of tumors, including ovarian cancer (OC). The aim of the present study was to demonstrate the function and working mechanism of lncRNA nuclear enriched abundant transcript 1 (NEAT1) in OC. The expressions of NEAT1 in OC were measured by reverse transcription‑quantitativePCR (RT‑qPCR). The effects of NEAT1 on cell proliferation, invasion, migration and epithelial‑mesenchymal transition (EMT) were detected by Cell Counting Kit‑8, transwell and wound healing assays, and western blotting. Dual‑luciferase reporter assays were performed to confirm the correlated between NEAT and miR‑1321, miR‑1321 and TJP3. The effect of NEAT1 on miR‑1321 and TJP3 was confirmed by RT‑qPCR and western blotting. Elevated expression of NEAT1 was observed in OC cell lines, and NEAT1 expression was found to be positively related to the expression of tight junction protein 3 (TJP3), which is important in cancer development. Moreover, the present results indicated that NEAT1 and TJP3 expression levels were negatively correlated with microRNA (miR)‑1321 expression in OC. Knockdown of NEAT1 attenuated the migration and invasion of OC cells, as well as increased miR‑1321 expression and in turn led to the reduction of TJP3. Thus, the present study demonstrated that NEAT1 regulates TJP3 expression by sponging miR‑1321 and enhances the epithelial‑mesenchymal transition, invasion and migration of OC cells. Overall, the present study identified the function and mechanism of NEAT1 in OC, suggesting that NEAT1 may be a promising therapeutic target for OC metastasis.
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Affiliation(s)
- Min Luo
- School of Medicine, Yunnan University, Kunming, Yunnan 650091, P.R. China
- School of Pharmaceutical Sciences and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
- Yunnan Key Laboratory of Quality Standards for Traditional Chinese Medicine and National Medicine, Yunnan University of Chinese Medicine, Kunming, Yunnan 650500, P.R. China
| | - Lei Zhang
- Department of Gynecology, Yunnan Tumor Hospital & The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650118, P.R. China
| | - Hongying Yang
- Department of Gynecology, Yunnan Tumor Hospital & The Third Affiliated Hospital of Kunming Medical University, Kunming, Yunnan 650118, P.R. China
| | - Kaili Luo
- School of Pharmaceutical Sciences and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
| | - Chen Qing
- School of Pharmaceutical Sciences and Yunnan Key Laboratory of Pharmacology for Natural Products, Kunming Medical University, Kunming, Yunnan 650500, P.R. China
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25
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Shao QP, Wei C, Yang J, Zhang WZ. miR-3609 Decelerates the Clearance of Sorafenib in Hepatocellular Carcinoma Cells by Targeting EPAS-1 and Reducing the Activation of the Pregnane X Receptor Pathway. Onco Targets Ther 2020; 13:7213-7227. [PMID: 32801751 PMCID: PMC7394586 DOI: 10.2147/ott.s246471] [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: 01/17/2020] [Accepted: 07/02/2020] [Indexed: 12/11/2022] Open
Abstract
Background The pregnane X receptor (PXR) not only plays an important role in cellular metabolism processes but also induces the resistance of hepatocellular carcinoma (HCC) cells to molecularly targeted drugs by mediating their metabolism and clearance by these cells. Endothelial PAS domain-containing protein 1 (EPAS-1) acts as a coactivator to regulate the transcription factor activity of PXR. In the present study, a microRNA that potentially targets EPAS-1, namely miR-3609, was identified using the miRDB tool. Methods The expression of miR-3609 and EPAS-1 was examined by qPCR. Lentiviral particles containing the full-length sequences of miR-3609 (pri-miR-3609) were prepared. The antitumor effect of antitumor agents was examined by the in vitro and in vivo assays. Results The expression of miR-3609 was negatively correlated with that of EPAS-1 in both HCC clinical specimens and paired non-tumor specimens, and the effect of miR-3609 on the expression of EPAS-1 was confirmed by Western blot experiments. Overexpression of miR-3609 decreased the expression of EPAS-1 and, in turn, repressed the activation of the PXR pathway. miR-3609 decreased the transcription factor activation of PXR, repressed its recruitment to its target gene promoter regions, and decreased the expression of its target genes CYP3A4 and P-GP. In addition, miR-3609 decelerated the metabolism and clearance of sorafenib in HCC cells and enhanced the antitumor effect of sorafenib in HCC cells. Conclusion Therefore, the results indicate that miR-3609 decreases the expression of EPAS-1 and enhances the sensitivity of HCC cells to sorafenib.
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Affiliation(s)
- Qing-Ping Shao
- Department of Pharmacy, The Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, Henan Province 450008, People's Republic of China
| | - Chen Wei
- Department of Pediatrics, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, People's Republic of China
| | - Jie Yang
- Department of Pharmacy, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan Province 450052, People's Republic of China
| | - Wen-Zhou Zhang
- Department of Pharmacy, The Affiliated Cancer Hospital of Zhengzhou University, Zhengzhou, Henan Province 450008, People's Republic of China
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Long-Noncoding RNA (lncRNA) in the Regulation of Hypoxia-Inducible Factor (HIF) in Cancer. Noncoding RNA 2020; 6:ncrna6030027. [PMID: 32640630 PMCID: PMC7549355 DOI: 10.3390/ncrna6030027] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Revised: 06/25/2020] [Accepted: 07/03/2020] [Indexed: 02/06/2023] Open
Abstract
Hypoxia is dangerous for oxygen-dependent cells, therefore, physiological adaption to cellular hypoxic conditions is essential. The transcription factor hypoxia-inducible factor (HIF) is the main regulator of hypoxic metabolic adaption reducing oxygen consumption and is regulated by gradual von Hippel-Lindau (VHL)-dependent proteasomal degradation. Beyond physiology, hypoxia is frequently encountered within solid tumors and first drugs are in clinical trials to tackle this pathway in cancer. Besides hypoxia, cancer cells may promote HIF expression under normoxic conditions by altering various upstream regulators, cumulating in HIF upregulation and enhanced glycolysis and angiogenesis, altogether promoting tumor proliferation and progression. Therefore, understanding the underlying molecular mechanisms is crucial to discover potential future therapeutic targets to evolve cancer therapy. Long non-coding RNAs (lncRNA) are a class of non-protein coding RNA molecules with a length of over 200 nucleotides. They participate in cancer development and progression and might act as either oncogenic or tumor suppressive factors. Additionally, a growing body of evidence supports the role of lncRNAs in the hypoxic and normoxic regulation of HIF and its subunits HIF-1α and HIF-2α in cancer. This review provides a comprehensive update and overview of lncRNAs as regulators of HIFs expression and activation and discusses and highlights potential involved pathways.
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Long Noncoding RNA NEAT1 Regulates TGF- β2-Induced Epithelial-Mesenchymal Transition of Lens Epithelial Cells through the miR-34a/Snail1 and miR-204/Zeb1 Pathways. BIOMED RESEARCH INTERNATIONAL 2020; 2020:8352579. [PMID: 32596382 PMCID: PMC7284955 DOI: 10.1155/2020/8352579] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/12/2020] [Accepted: 05/02/2020] [Indexed: 02/07/2023]
Abstract
The aim of this study was to explore whether the long noncoding RNA nuclear paraspeckle assembly transcript 1 (NEAT1)/miR-34a/Snail1 and NEAT1/miR-204/Zeb1 pathways are involved in epithelial-mesenchymal transition (EMT) of lens epithelial cells (LECs). Primary human LECs (HLECs) were separated and cultured. Our results identified that TGF-β2 induces NEAT1 overexpression in a dose-dependent manner and a time-dependent manner. Additionally, TGF-β2 induced downregulation of E-cadherin and upregulation of fibronectin in primary HLECs through a NEAT1-dependent mechanism. Microarray analysis showed that NEAT1 overexpression inhibited the miR-34a and miR-204 levels in the LECs. The expression of miR-34a and miR-204 was decreased, and the levels of Snail1 and Zeb1 were elevated in human posterior capsule opacification- (PCO-) attached LECs and the LECs obtained from anterior subcapsular cataract (ASC) by quantitative RT-PCR (qRT-PCR). Mechanistic studies revealed that NEAT1 negatively regulates miR-34a or miR-204, and miR-34a or miR-204 directly targets Snail1 or Zeb1 by luciferase assay and RNA-binding protein immunoprecipitation assay, respectively. Overall, the NEAT1/miR-34a/Snail1 and NEAT1/miR-204/Zeb1 pathways are involved in TGF-β2-induced EMT of HLECs. In summary, TGF-β2 induces NEAT1 overexpression, which in turn suggests that NEAT1 acts as a ceRNA targeting Snail1 or Zeb1 by binding miR-34a or miR-204, and promotes the progression of EMT of LECs.
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Zhou L, Zhu Y, Sun D, Zhang Q. Emerging Roles of Long non-coding RNAs in The Tumor Microenvironment. Int J Biol Sci 2020; 16:2094-2103. [PMID: 32549757 PMCID: PMC7294937 DOI: 10.7150/ijbs.44420] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 04/13/2020] [Indexed: 12/15/2022] Open
Abstract
Long non-coding RNAs (lncRNAs) are a diverse class of longer than 200 nucleotides RNA transcripts that have limited protein coding capacity. LncRNAs display diverse cellular functions and widely participate in both physiological and pathophysiological processes. Aberrant expressions of lncRNAs are correlated with tumor progression, providing sound rationale for their targeting as attractive anti-tumor therapeutic strategies. Emerging evidences support that lncRNAs participate in tumor-stroma crosstalk and stimulate a distinctive and suitable tumor microenvironment (TME). The TME comprises several stromal cells such as cancer stem cells (CSCs), cancer-associated endothelial cells (CAEs), cancer-associated fibroblasts (CAFs) and infiltrated immune cells, all of which are involved in the complicated crosstalk with tumor cells to affect tumor progression. In this review, we summarize the essential properties and functional roles of known lncRNAs in related to the TME to validate lncRNAs as potential biomarkers and promising anti-cancer targets.
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Affiliation(s)
- Lisha Zhou
- Taizhou University hospital, Taizhou University, Taizhou, Zhejiang, 318000, China
| | - Yingying Zhu
- Taizhou University hospital, Taizhou University, Taizhou, Zhejiang, 318000, China
| | - Dongsheng Sun
- Taizhou University hospital, Taizhou University, Taizhou, Zhejiang, 318000, China
| | - Qiang Zhang
- Taizhou Municipal Hospital, Taizhou University, Taizhou, Zhejiang, 318000, China
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Tan X, Wang P, Lou J, Zhao J. Knockdown of lncRNA NEAT1 suppresses hypoxia-induced migration, invasion and glycolysis in anaplastic thyroid carcinoma cells through regulation of miR-206 and miR-599. Cancer Cell Int 2020; 20:132. [PMID: 32336952 PMCID: PMC7178727 DOI: 10.1186/s12935-020-01222-x] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Accepted: 04/17/2020] [Indexed: 02/06/2023] Open
Abstract
Background Anaplastic thyroid carcinoma (ATC) is one of the most aggressive and lethal malignancies. Long non-coding RNAs (lncRNAs) are being found to play crucial roles in ATC progression. Herein, we focused on the role of nuclear paraspeckle assembly transcript 1 (NEAT1) on ATC progression under hypoxia and underlying mechanisms governing it. Methods The expression levels of NEAT1, miR-206 and miR-599 were assessed by quantitative real-time polymerase chain reaction (qRT-PCR). Cell migration and invasion abilities were detected using transwell assays. Glucose consumption and lactate production were determined using a corresponding commercial assay kit. Western blot was performed to evaluate the level of hexokinase 2 (HK2). The targeted interplays between NEAT1 and miR-206 or miR-599 were confirmed by dual-luciferase reporter and RNA immunoprecipitation (RIP) assays. Xenograft model was established to observe the effect of NEAT1 on tumor growth in vivo. Results Our data indicated that NEAT1 was highly expressed in ATC tissues and cells, and hypoxia induced NEAT1 expression in ATC cells. NEAT1 depletion repressed ATC cell migration, invasion and glycolysis under hypoxia. Mechanistically, NEAT1 acted as a molecular sponge of miR-206 and miR-599. Moreover, the repressive effects of NEAT1 knockdown on ATC cell migration, invasion and glycolysis under hypoxia were mediated by miR-206 or miR-599. Additionally, NEAT1 knockdown weakened tumor growth in vivo. Conclusion In conclusion, our study suggested that a low NEAT1 expression suppressed the migration, invasion, and glycolysis in ATC cells under hypoxia at least partially through modulating miR-206 and miR-599, providing new therapeutic strategies for ATC treatment.
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Affiliation(s)
- Xiangrong Tan
- 1Institute of Cancer and Basic Medicine (ICBM), Chinese Academy of Sciences, Hangzhou, Zhejiang China.,2Department of Head and Neck Surgery, Cancer Hospital of the University of Chinese Academy of Sciences, Hangzhou, Zhejiang China.,3Department of Head and Neck Surgery, Zhejiang Cancer Hospital, No.1, Banshan East Road, Hangzhou, 310000 Zhejiang China
| | - Peng Wang
- 1Institute of Cancer and Basic Medicine (ICBM), Chinese Academy of Sciences, Hangzhou, Zhejiang China.,2Department of Head and Neck Surgery, Cancer Hospital of the University of Chinese Academy of Sciences, Hangzhou, Zhejiang China.,3Department of Head and Neck Surgery, Zhejiang Cancer Hospital, No.1, Banshan East Road, Hangzhou, 310000 Zhejiang China
| | - Jianlin Lou
- 1Institute of Cancer and Basic Medicine (ICBM), Chinese Academy of Sciences, Hangzhou, Zhejiang China.,2Department of Head and Neck Surgery, Cancer Hospital of the University of Chinese Academy of Sciences, Hangzhou, Zhejiang China.,3Department of Head and Neck Surgery, Zhejiang Cancer Hospital, No.1, Banshan East Road, Hangzhou, 310000 Zhejiang China
| | - Jiazheng Zhao
- 1Institute of Cancer and Basic Medicine (ICBM), Chinese Academy of Sciences, Hangzhou, Zhejiang China.,2Department of Head and Neck Surgery, Cancer Hospital of the University of Chinese Academy of Sciences, Hangzhou, Zhejiang China.,3Department of Head and Neck Surgery, Zhejiang Cancer Hospital, No.1, Banshan East Road, Hangzhou, 310000 Zhejiang China
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30
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Zhuang ST, Cai YJ, Liu HP, Qin Y, Wen JF. LncRNA NEAT1/miR-185-5p/IGF2 axis regulates the invasion and migration of colon cancer. Mol Genet Genomic Med 2020; 8:e1125. [PMID: 32077635 PMCID: PMC7196445 DOI: 10.1002/mgg3.1125] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2019] [Revised: 12/07/2019] [Accepted: 01/02/2020] [Indexed: 01/02/2023] Open
Abstract
Background Long noncoding RNAs (lncRNA) are important in the growth and metastasis of colon cancer. The objective of this study was to describe the potential role of lncRNA NEAT1 in the progression of colon cancer. Methods Quantitative real‐time polymerase chain reaction was used for detecting NEAT1, miR‐185‐5p, and IGF2 in colon cancer cells and tissues. The potential diagnostic value of NEAT1 in colon cancer was analyzed with the receiver operating characteristic curve. Kaplan–Meier method was applied for evaluating the association between NEAT1 expression and the overall survival of osteosarcoma patients, whereas Transwell assay was introduced to examine the potential invasion and migration of colon cancer cells. In addition, the binding of NEAT1/IGF2 to miR‐185‐5p was confirmed by RNA pull‐down and RNA‐binding protein immunoprecipitation assays and dual‐luciferase reporter gene assay. Finally, rescue experiments were conducted to confirm the role of NEAT1/miR‐185‐5p/IGF2 axis in colon cancer. Results Colon cancer patients with low NEAT1 expression presented with longer overall survival than those with high expression. The migration and invasion of colon cancer cells were considerably promoted by overexpressed NEAT1. Both NEAT1 and IGF2 bound to miR‐185‐5p. Conclusion NEAT1 upregulate IGF2 expression through absorbing miR‐185‐5p to enhances the migration and invasion of colon cancer cells.
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Affiliation(s)
- Shu-Tong Zhuang
- Department of Gastrointestinal Surgery, Health Science Center, The First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong, China.,Shenzhen Second People's Hospital, Shenzhen, Guangdong, China
| | - Yan-Juan Cai
- Shenzhen Second People's Hospital, Shenzhen, Guangdong, China.,Health Science Center, The First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong, China
| | - Hong-Peng Liu
- Department of Gastrointestinal Surgery, Health Science Center, The First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong, China.,Shenzhen Second People's Hospital, Shenzhen, Guangdong, China
| | - Ying Qin
- Department of Gastrointestinal Surgery, Health Science Center, The First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong, China.,Shenzhen Second People's Hospital, Shenzhen, Guangdong, China
| | - Jian-Feng Wen
- Department of Gastrointestinal Surgery, Health Science Center, The First Affiliated Hospital of Shenzhen University, Shenzhen, Guangdong, China.,Shenzhen Second People's Hospital, Shenzhen, Guangdong, China
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Xu H, Chen Y, Zhuang J, Zhu S, Xu B, Hong J. The role and mechanism of lncRNA NEAT1 in the fibrosis of pulmonary epithelial cell. Mol Cell Toxicol 2020. [DOI: 10.1007/s13273-019-00069-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Abstract
Background
Pulmonary fibrosis is a serious clinical fatal disease. Epithelial–mesenchymal transition (EMT) and lncRNA NEAT1 have been implied in its development and progression.
Objective
To study the role of lncRNA NEAT1 in the progression of fibrosis in human pulmonary epithelial cells (BEAS-2B). Specifically, BEAS-2B was transfected with NEAT1 and miR-29c, EMT and cell proliferation were measured and the expression level of relevant genes was determined by Western blot.
Result
Results showed that NEAT1 promotes fibrosis and proliferation of BEAS-2B cells via the up-regulation of α-SMA, Vimentin, Snail and proliferation-related genes including Cyclin D1 and Cyclin E; miR-29c is a target gene of NEAT1 and through which NEAT1 regulates EMT and expression of proliferation-related genes.
Conclusion
This study investigated the mechanism of pulmonary fibrosis progression by elucidating the role of NEAT1/miR-29c in the fibrosis and proliferation of BEAS-2B cells, thus providing a basis for the new therapeutic targets of pulmonary fibrosis.
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Long noncoding RNA NEAT1 is involved in the protective effect of Klotho on renal tubular epithelial cells in diabetic kidney disease through the ERK1/2 signaling pathway. Exp Mol Med 2020; 52:266-280. [PMID: 32054986 PMCID: PMC7062691 DOI: 10.1038/s12276-020-0381-5] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2019] [Revised: 12/10/2019] [Accepted: 01/01/2020] [Indexed: 11/16/2022] Open
Abstract
Klotho, an antiaging protein, has been shown to play a protective role in renal tubular epithelial-mesenchymal transition (EMT) during the development of diabetic kidney disease (DKD). Long noncoding RNAs (lncRNAs) participate in the progression of EMT in many diseases. However, the effect of Klotho on lncRNAs during the development of DKD is still unknown. In this study, we found that Klotho overexpression in high-fat diet (HFD)- and streptozotocin (STZ)-induced DKD mice significantly inhibited the expression of lncRNA nuclear-enriched abundant transcript 1 (Neat1). We demonstrated that NEAT1 was significantly upregulated in both bovine serum albumin (BSA)-stimulated HK2 cells and mice with HFD- and STZ-induced diabetes. In addition, we observed that Klotho displays colocalization with NEAT1. Furthermore, overexpression of Klotho can inhibit the high expression of NEAT1 in BSA-stimulated HK2 cells, while silencing Klotho can further upregulate the expression of NEAT1. Silencing NEAT1 in HK2 cells resulted in inhibition of the EMT-related markers alpha smooth muscle actin (α-SMA) and vimentin (VIM) and the renal fibrosis-related markers transforming growth factor-β1 (TGF-β1) and connective tissue growth factor (CTGF). The effect of NEAT1 on DKD was partly mediated by regulation of the ERK1/2 signaling pathway. Finally, we found that silencing NEAT1 can reverse the activation of EMT and fibrosis caused by Klotho silencing in a manner dependent on the ERK1/2 signaling pathway. These findings reveal a new regulatory pathway by which Klotho regulates ERK1/2 signaling via NEAT1 to protect against EMT and renal fibrosis, suggesting that NEAT1 is a potential therapeutic target for DKD. An anti-ageing protein called Klotho helps protect against kidney failure in mice and human cells by silencing a long non-coding RNA molecule. The regulatory RNA involved, known as NEAT1, promotes cellular transformations associated with the disease process. A team led by Yao-Ming Xue from Southern Medical University in Guangdong, China, showed that levels of NEAT1 are elevated in mouse models of diabetic kidney disease and in injured human kidney calls. The identification of NEAT1 in kidney disease thus provides a novel therapeutic target. After demonstrating that Klotho and NEAT1 interact directly with each other in cells, they experimentally boosted Klotho expression and observed suppressed levels of NEAT1. As a consequence, the cells displayed lower levels of the proteins linked to the progressive deposition of fibrosis in the kidneys.
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Zhang S, Song X. Long non-coding RNA SNHG1 promotes cell proliferation and invasion of hepatocellular carcinoma by acting as a molecular sponge to modulate miR-195. Arch Med Sci 2020; 16:386-394. [PMID: 32190150 PMCID: PMC7069425 DOI: 10.5114/aoms.2019.81311] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 12/09/2018] [Indexed: 01/22/2023] Open
Abstract
INTRODUCTION Although long non-coding RNA SNHG1 (lncRNA SNHG1) action on cell proliferation and invasion of hepatocellular carcinoma (HCC) cells has been reported, the effects of lncRNA SNHG1 on migration of HCC cells and the mechanisms are still unclear. The present study aimed to investigate the influence of lncRNA SNHG1 on metastasis in HCC cells and the possible mechanisms underlying this phenotype. MATERIAL AND METHODS Expression of lncRNA SNHG1 and miR-195 was determined using qRT-PCR in both HCC cell lines Huh7 and HepG2. Si-RNA was used to silence SNHG1 and miR-195 inhibitor was used to inhibit expression of miR-195. Luciferase reporter assay was conducted to confirm whether miR-195 was the direct binding target of SNHG1. RESULTS lncRNA SNHG1 was significantly up-regulated and miR-195 was significantly down-regulated in HCC cell lines. When transfected with si-SNHG1, migration and invasion of HCC cells, as well as expression of astrocyte elevated gene 1 (AEG-1) protein, were significantly inhibited compared with the control cells. Results of dual luciferase reporter assay showed that lncRNA SNHG1 acted as an endogenous sponge of miR-195. On the other hand, the expression of miR-195 in tumor tissue was much lower than that of miR-195 in the corresponding normal tissue. Furthermore, the correlation analysis showed a strong negative relationship between lncRNA SNHG1 and miR-195 expression in HCC tissues. CONCLUSIONS SNHG1 may promote cell invasion and migration in HCC cells by sponging miR-195. These results can provide deeper understanding of SNHG1 in hepatocellular cancer and give new potential targets for treatment of HCC.
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Affiliation(s)
- Shuai Zhang
- Department of Radiation Oncology, Hainan General Hospital, Haikou, China
| | - Xiaoding Song
- Clinical Laboratory, Hainan General Hospital, Haikou, China
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Zhang M, Wang X, Yao J, Qiu Z. Long non-coding RNA NEAT1 inhibits oxidative stress-induced vascular endothelial cell injury by activating the miR-181d-5p/CDKN3 axis. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 47:3129-3137. [PMID: 31352814 DOI: 10.1080/21691401.2019.1646264] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Endothelial cell (EC) dysfunction induces atherosclerotic coronary heart disease (CHD) development. Recent studies demonstrated that lncRNA NEAT1 mediates multiple biological functions of cells. How NEAT1 regulates EC function is still unclear, so this study explored the role and mechanism of NEAT1 in oxidative stress-induced ECs. The levels of NEAT1 and miR-181d-5p were measured in serum samples from ApoE-/- mice and t-BHP-treated human umbilical vein endothelial cells (HUVECs) by qRT-PCR. The potential role of NEAT1 in viability, migration and apoptosis was analyzed by CCK-8, cell metastasis, flow cytometry, dual-luciferase reporter, RNA immunoprecipitation and Western blot assays using HUVECs overexpressing NEAT1. The expression of NEAT1 was increased, but miR-181d-5p expression was decreased in serum samples from both ApoE-/- mice and t-BHP-treated HUVECs. Overexpression of NEAT1 increased viability, migration and CDKN3 expression but decreased apoptotic rates, caspase-3 activity and miR-181d-5p expression in HUVECs. In addition, NEAT1 acted as a promoter of the proangiogenic capacity of HUVECs by targeting miR-181d-5p/CDKN3. Altogether, these findings indicate that NEAT1 may exert a protective effect on HUVECs by regulating the miR-181d-5p/CDKN3A axis.
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Affiliation(s)
- Min Zhang
- a Division of Cardiology, TongRen Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai , China
| | - Xueting Wang
- a Division of Cardiology, TongRen Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai , China
| | - Jing Yao
- b Division of Cardiology, Huadong Hospital affiliated with Fudan University , Shanghai , China
| | - Zhaohui Qiu
- a Division of Cardiology, TongRen Hospital, Shanghai Jiao Tong University School of Medicine , Shanghai , China
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Cui Y, Yin Y, Xiao Z, Zhao Y, Chen B, Yang B, Xu B, Song H, Zou Y, Ma X, Dai J. LncRNA Neat1 mediates miR-124-induced activation of Wnt/β-catenin signaling in spinal cord neural progenitor cells. Stem Cell Res Ther 2019; 10:400. [PMID: 31852544 PMCID: PMC6921476 DOI: 10.1186/s13287-019-1487-3] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2019] [Revised: 10/04/2019] [Accepted: 11/05/2019] [Indexed: 12/12/2022] Open
Abstract
BACKGROUND Emerging evidence suggests that miR-124 performs important biological functions in neural stem cells (NSCs); it regulates NSC behavior and promotes the differentiation of NSCs into neurons, but the exact molecular mechanism remains unknown. And also, the role of miR-124 during spinal cord injury regeneration is unclear. MATERIALS AND METHODS In order to explore the function of miR-124 in neural differentiation, the molecular markers (Tuj1, Map2, and GFAP) correlated with the differentiation of NSCs were detected by immunofluorescence staining both in cultured mouse spinal cord progenitor cells (SC-NPCs) and in spinal cord injury (SCI) animal models. The migration ability and apoptosis of cultured SC-NPCs were also evaluated by Transwell migration assay and TUNEL assay. In addition, the relative expression of lnRNA Neat1- and Wnt/β-catenin signaling-related genes were detected by quantitative real-time PCR. RESULTS In this study, we revealed that lncRNA Neat1 is involved in regulating Wnt/β-catenin signaling that is activated by miR-124 in SC-NPCs. LncRNA Neat1 was also found to play an important role in regulating neuronal differentiation, apoptosis, and migration of SC-NPCs. Furthermore, we demonstrated that overexpression of miR-124 resulted in elevated Neat1 expression, accompanied with the functional recovery of locomotion in a mouse model of spinal cord injury. CONCLUSIONS Our results confirm the therapeutic effectiveness of miR-124 on the functional recovery of injured spinal cord, supporting the rationale and feasibility of miR-124 for spinal cord injury treatment in future clinical therapy. Furthermore, we concluded that the miR-124-Neat1-Wnt/β-catenin signaling axis is involved in regulating the cell function of SC-NPCs, and this may offer novel therapeutic avenues for future treatment of SCI.
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Affiliation(s)
- Yi Cui
- Reproductive and Genetic Center of National Research Institute for Family Planning, Beijing, 100081, China
| | - Yanyun Yin
- Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 3 Nanyitiao, Zhongguancun, Beijing, 100080, China
| | - Zhifeng Xiao
- Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 3 Nanyitiao, Zhongguancun, Beijing, 100080, China
| | - Yannan Zhao
- Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 3 Nanyitiao, Zhongguancun, Beijing, 100080, China
| | - Bing Chen
- Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 3 Nanyitiao, Zhongguancun, Beijing, 100080, China
| | - Bin Yang
- Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 3 Nanyitiao, Zhongguancun, Beijing, 100080, China
| | - Bai Xu
- Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 3 Nanyitiao, Zhongguancun, Beijing, 100080, China
| | - Hongwei Song
- Orthopaedics Surgery Department, China-Japan Union Hospital of Jilin University, 126 Xiantai Street, Changchun, 130033, Jilin Province, China
| | - Yunlong Zou
- EHBIO Gene Technology, No. 46, Jiugulou Street, Beijing, 100100, China
| | - Xu Ma
- Reproductive and Genetic Center of National Research Institute for Family Planning, Beijing, 100081, China.
| | - Jianwu Dai
- Key Laboratory of Molecular Developmental Biology, Institute of Genetics and Developmental Biology, Chinese Academy of Sciences, 3 Nanyitiao, Zhongguancun, Beijing, 100080, China.
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Liu Q, Shi H, Yang J, Jiang N. Long Non-Coding RNA NEAT1 Promoted Hepatocellular Carcinoma Cell Proliferation and Reduced Apoptosis Through the Regulation of Let-7b-IGF-1R Axis. Onco Targets Ther 2019; 12:10401-10413. [PMID: 31819522 PMCID: PMC6890520 DOI: 10.2147/ott.s217763] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 10/15/2019] [Indexed: 12/28/2022] Open
Abstract
Background and aim Long non-coding RNA nuclear-enriched abundant transcript 1 (NEAT1) is abnormally expressed in various human malignancies, including hepatocellular carcinoma (HCC). Let-7b is a miRNA with the effect of a tumor suppressor gene, and its expression level in various tumor tissues is lower than that in normal tissues. Studies have found that IGF-1R can be abnormally activated in the process of hepatocyte deterioration, and the expression level of IGF-1R in HCC is significantly up-regulated. The aim of this study was to investigate the functional mechanism of NEAT1/let-7b-IGF-1R axis in HCC. Methods The expressions of NEAT1 and microRNA (miR)-let-7b in HCC tissues and cell lines were quantified by quantitative real-time PCR (qRT-PCR). The effect of NEAT1 on tumor growth was observed in a mice model of transplanted hepatoma. The effects of down-regulation or up-regulation of NEAT1 expression in HCC cell lines were analysed from the perspectives of cell viability and apoptosis. The binding sites of NEAT1 and miR-let-7b were predicted by biological software. The expression of the miR-let-7b target molecules IGF-1R was detected by Western blotting. Results The results showed that the expressions of NEAT1 were significantly increased, while the expressions of miR-let-7b were decreased in the HCC tissues and cell lines. Additionally, it was found that the expressions of NEAT1 and miR-let-7b showed a negative correlation in HCC tissues. The mouse model experiments confirmed that the interference with NEAT1 expression inhibited the tumor growth. Meanwhile, the cell viability of HepG2/Huh7 cell lines was significantly decreased via the downregulation of NEAT1, whereas the corresponding rates of apoptosis were significantly increased. It was further proven that there was a certain negative regulatory mechanism between NEAT1 and miR-1et-7b, which was related to the expression of IGF-1R. Conclusion The over-expression of NEAT1 could promote the proliferation of HCC cells by inhibiting the expression of the miR-let-7b regulated by IGF-1R.
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Affiliation(s)
- Qin Liu
- Department of Gastroenterology, Weihai Municipal Hospital, Weihai, People's Republic of China
| | - Hexian Shi
- Department of Hepatobiliary Surgery, Heze Municipal Hospital, Heze, People's Republic of China
| | - Jianbo Yang
- Department of Oral Medicine, Weihai Stomatological Hospital, Weihai, People's Republic of China
| | - Ning Jiang
- Department of General Surgery, Shandong Provincial Third Hospital, Jinan, People's Republic of China
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Han D, Fang Y, Guo Y, Hong W, Tu J, Wei W. The emerging role of long non-coding RNAs in tumor-associated macrophages. J Cancer 2019; 10:6738-6746. [PMID: 31777603 PMCID: PMC6856883 DOI: 10.7150/jca.35770] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2019] [Accepted: 08/24/2019] [Indexed: 12/18/2022] Open
Abstract
Tumor-associated macrophages (TAMs) are an important cellular component of the tumor microenvironment (TME) and play an essential role in tumor immunity. Recently, numerous studies have indicated that long non-coding RNAs (lncRNAs) can affect several functions of TAMs. In the present review, we summarize the versatile role of lncRNAs in the polarization, epigenetic modulation, and classic signaling pathways of TAMs, which represent a potential target for tumor diagnosis or treatment.
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Affiliation(s)
- Dafei Han
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Hefei, China
| | - Yilong Fang
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Hefei, China
| | - Yawei Guo
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Hefei, China
| | - Wenming Hong
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Hefei, China
| | - Jiajie Tu
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Hefei, China
| | - Wei Wei
- Institute of Clinical Pharmacology, Anhui Medical University, Key Laboratory of Anti-Inflammatory and Immune Medicine, Ministry of Education, Anhui Collaborative Innovation Center of Anti-Inflammatory and Immune Medicine, Hefei, China
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Zhang G, Lan Y, Xie A, Shi J, Zhao H, Xu L, Zhu S, Luo T, Zhao T, Xiao Y, Li X. Comprehensive analysis of long noncoding RNA (lncRNA)-chromatin interactions reveals lncRNA functions dependent on binding diverse regulatory elements. J Biol Chem 2019; 294:15613-15622. [PMID: 31484726 DOI: 10.1074/jbc.ra119.008732] [Citation(s) in RCA: 28] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2019] [Revised: 08/30/2019] [Indexed: 12/28/2022] Open
Abstract
Over the past decade, thousands of long noncoding RNAs (lncRNAs) have been identified, many of which play crucial roles in normal physiology and human disease. LncRNAs can interact with chromatin and then recruit protein complexes to remodel chromatin states, thus regulating gene expression. However, how lncRNA-chromatin interactions contribute to their biological functions is largely unknown. Here, we collected and constructed an atlas of 188,647 lncRNA-chromatin interactions in human and mouse. All lncRNAs showed diverse epigenetic modification patterns at their binding sites, especially the marks of enhancer activity. Functional analysis of lncRNA target genes further revealed that lncRNAs could exert their functions by binding to both promoter and distal regulatory elements, especially the distal regulatory elements. Intriguingly, many important pathways were observed to be widely regulated by lncRNAs through distal binding. For example, NEAT1, a cancer lncRNA, controls 13.3% of genes in the PI3K-AKT signaling pathway by interacting with distal regulatory elements. In addition, "two-gene" signatures composed of a lncRNA and its distal target genes, such as HOTAIR-CRIM1, provided significant clinical benefits relative to the lncRNA alone. In summary, our findings underscored that lncRNA-distal interactions were essential for lncRNA functions, which would provide new clues to understand the molecular mechanisms of lncRNAs in complex disease.
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Affiliation(s)
- Guanxiong Zhang
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Yujia Lan
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Aimin Xie
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Jian Shi
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Hongying Zhao
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Liwen Xu
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Shiwei Zhu
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Tao Luo
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Tingting Zhao
- Department of Neurology, The First Affiliated Hospital of Harbin Medical University, Harbin, Heilongjiang 150001, China
| | - Yun Xiao
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang 150081, China
| | - Xia Li
- College of Bioinformatics Science and Technology, Harbin Medical University, Harbin, Heilongjiang 150081, China
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Chen S, Xia X. Long noncoding RNA NEAT1 suppresses sorafenib sensitivity of hepatocellular carcinoma cells via regulating miR-335-c-Met. J Cell Physiol 2019; 234:14999-15009. [PMID: 30937906 DOI: 10.1002/jcp.27567] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2018] [Accepted: 09/13/2018] [Indexed: 01/24/2023]
Abstract
OBJECTIVES To investigate the role of long noncoding RNA (lncRNA) nuclear-enriched abundant transcript 1 (NEAT1) in regulating sorafenib (Sora) sensitivity of hepatocellular carcinoma (HCC) cells and possible signaling pathways. METHODS HCC cell lines and tumor tissue were quantified for NEAT1 expression by quantitative polymerase chain reaction (qPCR). Following shRNA (short hairpin RNA) knockdown of NEAT1, cell viability, apoptosis, and related protein expression were measured after drug treatment. The downstream target of NEAT1, including miR-335 and c-Met was studied using a combination of luciferase binding assay, gene knockdown/overexpression, western blot analysis, and cell viability/apoptosis assay. Cancer cells with NEAT1 knockdown were transplanted onto nude mice for in vivo tumorigenesis assay. RESULTS Silencing of NEAT1 in HCC cells facilitated Sora sensitivity by enhancing drug-induced apoptosis, and led to smaller tumor size on nude mice. Mechanistic study suggested that miR-335 was negatively regulated by NEAT1, and miR-335 further suppressed c-Met-Akt pathway, whose activation caused drug resistance of HCC cells. The knockdown of miR-335, or overexpression of c-Met, all remarkably abolished the proapoptotic effect of NEAT1 knockdown in HCC cells. CONCLUSION lncRNA NEAT1 mediates Sora resistance of HCC cells by suppressing miR-335 expression, and disinhibition on c-Met-Akt signaling pathway. Our results provide potency of NEAT1 as the biomarker for drug resistant HCC and possible treating targets.
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Affiliation(s)
- Shuwei Chen
- Department of Hepatobiliary Surgery, Chenzhou First People's Hospital, Chenzhou, China
| | - Xinhu Xia
- Department of Somatic Disease, Hunan Provincial Secondary People's Hospital, Changsha, China
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Chi Y, Wang D, Wang J, Yu W, Yang J. Long Non-Coding RNA in the Pathogenesis of Cancers. Cells 2019; 8:cells8091015. [PMID: 31480503 PMCID: PMC6770362 DOI: 10.3390/cells8091015] [Citation(s) in RCA: 509] [Impact Index Per Article: 101.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Revised: 08/25/2019] [Accepted: 08/29/2019] [Indexed: 12/24/2022] Open
Abstract
The incidence and mortality rate of cancer has been quickly increasing in the past decades. At present, cancer has become the leading cause of death worldwide. Most of the cancers cannot be effectively diagnosed at the early stage. Although there are multiple therapeutic treatments, including surgery, radiotherapy, chemotherapy, and targeted drugs, their effectiveness is still limited. The overall survival rate of malignant cancers is still low. It is necessary to further study the mechanisms for malignant cancers, and explore new biomarkers and targets that are more sensitive and effective for early diagnosis, treatment, and prognosis of cancers than traditional biomarkers and methods. Long non-coding RNAs (lncRNAs) are a class of RNA transcripts with a length greater than 200 nucleotides. Generally, lncRNAs are not capable of encoding proteins or peptides. LncRNAs exert diverse biological functions by regulating gene expressions and functions at transcriptional, translational, and post-translational levels. In the past decade, it has been demonstrated that the dysregulated lncRNA profile is widely involved in the pathogenesis of many diseases, including cancer, metabolic disorders, and cardiovascular diseases. In particular, lncRNAs have been revealed to play an important role in tumor growth and metastasis. Many lncRNAs have been shown to be potential biomarkers and targets for the diagnosis and treatment of cancers. This review aims to briefly discuss the latest findings regarding the roles and mechanisms of some important lncRNAs in the pathogenesis of certain malignant cancers, including lung, breast, liver, and colorectal cancers, as well as hematological malignancies and neuroblastoma.
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Affiliation(s)
- Yujing Chi
- Department of Central Laboratory & Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing 100044, China
| | - Di Wang
- Department of Central Laboratory & Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing 100044, China
| | - Junpei Wang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China
- Key Laboratory of Cardiovascular Science of the Ministry of Education, Center for Non-coding RNA Medicine, Beijing 100191, China
| | - Weidong Yu
- Department of Central Laboratory & Institute of Clinical Molecular Biology, Peking University People's Hospital, Beijing 100044, China
| | - Jichun Yang
- Department of Physiology and Pathophysiology, School of Basic Medical Sciences, Peking University Health Science Center, Beijing 100191, China.
- Key Laboratory of Cardiovascular Science of the Ministry of Education, Center for Non-coding RNA Medicine, Beijing 100191, China.
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Ghafouri-Fard S, Taheri M. Nuclear Enriched Abundant Transcript 1 (NEAT1): A long non-coding RNA with diverse functions in tumorigenesis. Biomed Pharmacother 2019; 111:51-59. [DOI: 10.1016/j.biopha.2018.12.070] [Citation(s) in RCA: 57] [Impact Index Per Article: 11.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 12/08/2018] [Accepted: 12/14/2018] [Indexed: 02/07/2023] Open
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Yan K, Fu Y, Zhu N, Wang Z, Hong JL, Li Y, Li WJ, Zhang HB, Song JH. Repression of lncRNA NEAT1 enhances the antitumor activity of CD8 +T cells against hepatocellular carcinoma via regulating miR-155/Tim-3. Int J Biochem Cell Biol 2019; 110:1-8. [PMID: 30710754 DOI: 10.1016/j.biocel.2019.01.019] [Citation(s) in RCA: 79] [Impact Index Per Article: 15.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2018] [Revised: 01/07/2019] [Accepted: 01/29/2019] [Indexed: 12/13/2022]
Abstract
BACKGROUND Immunotherapy is a promising method for the treatment of hepatocellular carcinoma (HCC), in which CD8+T cells play a key role. The influence of long noncoding RNA (lncRNA) nuclear-enriched autosomal transcript 1(NEAT1) on the antitumor activity of CD8+T cells was clarified in this study. METHODS Peripheral blood mononuclear cells (PBMCs) were isolated from HCC patients, and the expressions of NEAT1 and Tim-3 were determined by qRT-PCR and western blot, respectively. CD8+T cell apoptosis and cell percentage were analyzed via flow cytometry. The cytolysis activity of CD8+T cells against HCC cells was examined. RNA immunoprecipitation (RIP) and RNA pull-down assay were performed to explore the interaction between NEAT1 and miR-155. RESULTS NEAT1 and Tim-3 were up-regulated in the PBMCs of patients with HCC (n = 20) compared with healthy subjects (n = 20). Down-regulation of NEAT1 restrained CD8+T cell apoptosis and enhanced the cytolysis activity, while interference of miR-155 showed the opposite effects by up-regulating Tim-3. Binding and interaction between NEAT1 and miR-155 were validated in CD8+T cells. Down-regulation of NEAT1 restrained CD8+T cell apoptosis and enhanced the cytolysis activity through the miR-155/Tim-3 pathway. Repression of NEAT1 suppressed tumor growth in HCC mice. CONCLUSION Via modulating the miR-155/Tim-3 pathway, repression of NEAT1 restrained CD8+T cell apoptosis and enhanced the cytolysis activity against HCC, implying an effective target for improving the outcome of immunotherapy.
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Affiliation(s)
- Kai Yan
- Fifth Department of Liver Surgery, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai 200438, China
| | - Yong Fu
- Fifth Department of Liver Surgery, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai 200438, China
| | - Nan Zhu
- Fifth Department of Liver Surgery, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai 200438, China
| | - Zhuo Wang
- Fifth Department of Liver Surgery, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai 200438, China
| | - Jin-Ling Hong
- Department of Hepatology, Shanghai Putuo District Central Hospital, Shanghai 200062, China
| | - Yao Li
- Department of General Surgery, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
| | - Wei-Jing Li
- Department of General Surgery, Beijing Hospital, National Center of Gerontology, Beijing 100730, China
| | - Hai-Bin Zhang
- Fifth Department of Liver Surgery, Eastern Hepatobiliary Surgery Hospital, The Second Military Medical University, Shanghai 200438, China.
| | - Jing-Hai Song
- Department of General Surgery, Beijing Hospital, National Center of Gerontology, Beijing 100730, China.
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Lin YH, Wu MH, Yeh CT, Lin KH. Long Non-Coding RNAs as Mediators of Tumor Microenvironment and Liver Cancer Cell Communication. Int J Mol Sci 2018; 19:ijms19123742. [PMID: 30477236 PMCID: PMC6321423 DOI: 10.3390/ijms19123742] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 11/21/2018] [Accepted: 11/21/2018] [Indexed: 02/06/2023] Open
Abstract
The tumor microenvironment is an important concept that defines cancer development not only through tumor cells themselves but also the surrounding cellular and non-cellular components, including stromal cells, blood vessels, infiltrating inflammatory cells, cancer stem cells (CSC), cytokines, and growth factors, which act in concert to promote tumor cell survival and metastasis. Hepatocellular carcinoma (HCC) is one of the most common and aggressive human malignancies worldwide. Poor prognosis is largely attributable to the high rate of tumor metastasis, highlighting the importance of identifying patients at risk in advance and developing novel therapeutic targets to facilitate effective intervention. Long non-coding RNAs (lncRNA) are a class of non-protein coding transcripts longer than 200 nucleotides frequently dysregulated in various cancer types, which have multiple functions in widespread biological processes, including proliferation, apoptosis, metastasis, and metabolism. lncRNAs are involved in regulation of the tumor microenvironment and reciprocal signaling between cancer cells. Targeting of components of the tumor microenvironment or cancer cells has become a considerable focus of therapeutic research and establishing the effects of different lncRNAs on this network should aid in the development of effective treatment strategies. The current review provides a summary of the essential properties and functional roles of known lncRNAs associated with the tumor microenvironment in HCC.
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MESH Headings
- Antineoplastic Agents/therapeutic use
- Biomarkers, Tumor/antagonists & inhibitors
- Biomarkers, Tumor/genetics
- Biomarkers, Tumor/metabolism
- Carcinoma, Hepatocellular/drug therapy
- Carcinoma, Hepatocellular/genetics
- Carcinoma, Hepatocellular/metabolism
- Carcinoma, Hepatocellular/pathology
- Cytokines/genetics
- Cytokines/metabolism
- Epigenesis, Genetic
- Gene Expression Regulation, Neoplastic
- Hepatocytes/drug effects
- Hepatocytes/metabolism
- Hepatocytes/pathology
- Humans
- Liver Neoplasms/drug therapy
- Liver Neoplasms/genetics
- Liver Neoplasms/metabolism
- Liver Neoplasms/pathology
- Macrophages/drug effects
- Macrophages/metabolism
- Macrophages/pathology
- Neoplasm Proteins/antagonists & inhibitors
- Neoplasm Proteins/genetics
- Neoplasm Proteins/metabolism
- Neoplastic Stem Cells/drug effects
- Neoplastic Stem Cells/metabolism
- Neoplastic Stem Cells/pathology
- RNA, Long Noncoding/antagonists & inhibitors
- RNA, Long Noncoding/genetics
- RNA, Long Noncoding/metabolism
- Signal Transduction
- Tumor Microenvironment/drug effects
- Tumor Microenvironment/genetics
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Affiliation(s)
- Yang-Hsiang Lin
- Department of Biochemistry, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan.
- Liver Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan 333, Taiwan.
| | - Meng-Han Wu
- Department of Biochemistry, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan.
| | - Chau-Ting Yeh
- Liver Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan 333, Taiwan.
| | - Kwang-Huei Lin
- Department of Biochemistry, College of Medicine, Chang Gung University, Taoyuan 333, Taiwan.
- Liver Research Center, Chang Gung Memorial Hospital, Linkou, Taoyuan 333, Taiwan.
- Research Center for Chinese Herbal Medicine, College of Human Ecology, Chang Gung University of Science and Technology, Taoyuan 333, Taiwan.
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Assani G, Zhou Y. Effect of modulation of epithelial-mesenchymal transition regulators Snail1 and Snail2 on cancer cell radiosensitivity by targeting of the cell cycle, cell apoptosis and cell migration/invasion. Oncol Lett 2018; 17:23-30. [PMID: 30655734 PMCID: PMC6313178 DOI: 10.3892/ol.2018.9636] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 09/11/2018] [Indexed: 12/14/2022] Open
Abstract
Cancer is one of the leading causes of cancer-associated mortality worldwide. Several strategies of treatment, including radiotherapy, have been developed and used to treat this disease. However, post-treatment metastasis and resistance to treatment are two major causes for the limited effectiveness of radiotherapy in cancer patients. Epithelial-mesenchymal transition (EMT) is regulated by SNAIL family transcription factors, including Snail1 and Snail2 (Slug), and serves important roles in progression and cancer resistance to treatment. Snail1 and Slug also have been shown to be implicated in cancer treatment resistance. For resolving the resistance to treatment problems, combining the modulation of gene expression with radiotherapy is a novel strategy to treat patients with cancer. The present review focuses on the effect of Snail1 and Slug on cancer radiosensitivity by targeting cell apoptosis, the cell cycle and cell migration/invasion.
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Affiliation(s)
- Ganiou Assani
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China.,Hubei Cancer Clinical Study Center, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China.,Hubei Key Laboratory of Tumor Biology Behaviors, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
| | - Yunfeng Zhou
- Department of Radiation and Medical Oncology, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China.,Hubei Cancer Clinical Study Center, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China.,Hubei Key Laboratory of Tumor Biology Behaviors, Zhongnan Hospital of Wuhan University, Wuhan, Hubei 430071, P.R. China
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45
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Dong P, Xiong Y, Yue J, Hanley SJB, Kobayashi N, Todo Y, Watari H. Long Non-coding RNA NEAT1: A Novel Target for Diagnosis and Therapy in Human Tumors. Front Genet 2018; 9:471. [PMID: 30374364 PMCID: PMC6196292 DOI: 10.3389/fgene.2018.00471] [Citation(s) in RCA: 130] [Impact Index Per Article: 21.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Accepted: 09/24/2018] [Indexed: 12/13/2022] Open
Abstract
The nuclear paraspeckle assembly transcript 1 (NEAT1, a long non-coding RNA) is frequently overexpressed in human tumors, and higher NEAT1 expression is correlated with worse survival in cancer patients. NEAT1 drives tumor initiation and progression by modulating the expression of genes involved in the regulation of tumor cell growth, migration, invasion, metastasis, epithelial-to-mesenchymal transition, stem cell-like phenotype, chemoresistance and radioresistance, indicating the potential for NEAT1 to be a novel diagnostic biomarker and therapeutic target. Mechanistically, NEAT1 functions as a scaffold RNA molecule by interacting with EZH2 (a subunit of the polycomb repressive complex) to influence the expression of downstream effectors of EZH2, it also acts as a microRNA (miRNA) sponge to suppress the interactions between miRNAs and target mRNAs, and affects the expression of miR-129 by promoting the DNA methylation of the miR-129 promoter region. Knockdown of NEAT1 via small interfering RNA or short hairpin RNA inhibits the malignant behavior of tumor cells. In this review, we highlight the latest insights into the expression pattern, biological roles and mechanisms underlying the function and regulation of NEAT1 in tumors, and especially focus on its clinical implication as a new diagnostic biomarker and an attractive therapeutic target for cancers.
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Affiliation(s)
- Peixin Dong
- Department of Obstetrics and Gynecology, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
| | - Ying Xiong
- State Key Laboratory of Oncology in South China, Department of Gynecology, Sun Yat-sen University Cancer Center, Guangzhou, China
| | - Junming Yue
- Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN, United States.,Center for Cancer Research, University of Tennessee Health Science Center, Memphis, TN, United States
| | - Sharon J B Hanley
- Department of Obstetrics and Gynecology, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
| | - Noriko Kobayashi
- Department of Obstetrics and Gynecology, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
| | - Yukiharu Todo
- Division of Gynecologic Oncology, National Hospital Organization, Hokkaido Cancer Center (NHO), Sapporo, Japan
| | - Hidemichi Watari
- Department of Obstetrics and Gynecology, Hokkaido University School of Medicine, Hokkaido University, Sapporo, Japan
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46
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Yan H, Li H, Li P, Li X, Lin J, Zhu L, Silva MA, Wang X, Wang P, Zhang Z. Long noncoding RNA MLK7-AS1 promotes ovarian cancer cells progression by modulating miR-375/YAP1 axis. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2018; 37:237. [PMID: 30249278 PMCID: PMC6154914 DOI: 10.1186/s13046-018-0910-4] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2018] [Accepted: 09/18/2018] [Indexed: 12/14/2022]
Abstract
Background Long noncoding RNAs (LncRNAs) have been reported to be abnormally expressed in human ovarian cancer and associated with the proliferation and metastasis of cancer cells. The objective of this study was to investigate the role and the underlying mechanisms of LncRNA MAP3K20 antisense RNA 1 (MLK7-AS1) in ovarian cancer. Methods The expression level of MLK7-AS1 was investigated in human ovarian cancer tissues and cell lines. The effects of MLK7-AS1 knockdown on ovarian cancer cell proliferation, migration, invasion and apoptosis were evaluated in vitro using MTT, colony formation assays, wound healing assays, transwell assays and flow cytometry. Furthermore, the in vivo effects were determined using the immunodeficient NSG female mice. Luciferase reporter assays were employed to identify interactions among MLK7-AS1 and its target genes. Results In the current study, MLK7-AS1 was specifically upregulated in ovarian cancer tissues and cell lines. Knockdown of MLK7-AS1 inhibited the ability of cell migration, invasion, proliferation, colony formation and wound healing, whereas promoted cell apoptosis in vitro. By using online tools and mechanistic analysis, we demonstrated that MLK7-AS1 could directly bind to miR-375 and downregulate its expression. Besides, MLK7-AS1 reversed the inhibitory effect of miR-375 on the growth of ovarian cancer cells, which might be involved in the upregulation of Yes-associated protein 1 (YAP1) expression. Moreover, knockdown MLK7-AS1 expression inhibited primary tumor growth in ovary and metastatic tumors in multiple peritoneal organs including liver and spleen in vivo, which were partly abolished by miR-375 inhibition. Mechanically, we found that MLK7-AS1 modulated the epithelial-mesenchymal transition (EMT) process by interacting with miR-375/YAP1 both in vivo and vitro, which promoted the expression of Slug. Conclusions Taken together, our study showed for the first time that MLK7-AS1 interacted with miR-375 to promote proliferation, metastasis, and EMT process in ovarian cancer cells through upregulating YAP1.
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Affiliation(s)
- Huan Yan
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China.,Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Hong Li
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Pengyun Li
- Department of Clinical Laboratory, The Third Affiliated Hospital of Zhengzhou University, No. 7 Front Kangfu Street, Zhengzhou, 450052, Henan, People's Republic of China
| | - Xia Li
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China
| | - Jianjian Lin
- Department of Bioscience, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Linlin Zhu
- Collaborative Innovation Center of Molecular Diagnosis and Laboratory Medicine, Xinxiang Medical University, Xinxiang, Henan, People's Republic of China
| | - Maria A Silva
- Department of Pathology and Laboratory Medicine, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Xiaofang Wang
- Department of Reproductive Medicine Center, the People's Hospital of Henan Province, Zhengzhou, Henan, People's Republic of China
| | - Ping Wang
- Department of Clinical Laboratory, The Third Affiliated Hospital of Zhengzhou University, No. 7 Front Kangfu Street, Zhengzhou, 450052, Henan, People's Republic of China
| | - Zhan Zhang
- Department of Obstetrics and Gynecology, The Third Affiliated Hospital of Zhengzhou University, Zhengzhou, Henan, People's Republic of China. .,Department of Clinical Laboratory, The Third Affiliated Hospital of Zhengzhou University, No. 7 Front Kangfu Street, Zhengzhou, 450052, Henan, People's Republic of China.
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47
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Yan L, Xu F, Dai CL. Relationship between epithelial-to-mesenchymal transition and the inflammatory microenvironment of hepatocellular carcinoma. JOURNAL OF EXPERIMENTAL & CLINICAL CANCER RESEARCH : CR 2018; 37:203. [PMID: 30157906 PMCID: PMC6114477 DOI: 10.1186/s13046-018-0887-z] [Citation(s) in RCA: 68] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2018] [Accepted: 08/21/2018] [Indexed: 02/08/2023]
Abstract
Epithelial-to-mesenchymal transition (EMT) is a complex process involving multiple genes, steps and stages. It refers to the disruption of tight intercellular junctions among epithelial cells under specific conditions, resulting in loss of the original polarity, order and consistency of the cells. Following EMT, the cells show interstitial cell characteristics with the capacity for adhesion and migration, while apoptosis is inhibited. This process is critically involved in embryogenesis, wound-healing, tumor invasion and metastasis. The tumor microenvironment is composed of infiltrating inflammatory cells, stromal cells and the active medium secreted by interstitial cells. Most patients with hepatocellular carcinoma (HCC) have a history of hepatitis virus infection. In such cases, major components of the tumor microenvironment include inflammatory cells, inflammatory factors and virus-encoded protein are major components. Here, we review the relationship between EMT and the inflammatory tumor microenvironment in the context of HCC. We also further elaborate the significant influence of infiltrating inflammatory cells and inflammatory mediators as well as the products expressed by the infecting virus in the tumor microenvironment on the EMT process.
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Affiliation(s)
- Long Yan
- Department of Hepatobiliary and Splenic Surgery, Sheng Jing Hospital of China Medical University, No.36 Sanhao Street, Heping District, Shenyang, Liaoning, China
| | - Feng Xu
- Department of Hepatobiliary and Splenic Surgery, Sheng Jing Hospital of China Medical University, No.36 Sanhao Street, Heping District, Shenyang, Liaoning, China
| | - Chao-Liu Dai
- Department of Hepatobiliary and Splenic Surgery, Sheng Jing Hospital of China Medical University, No.36 Sanhao Street, Heping District, Shenyang, Liaoning, China.
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48
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Long noncoding RNA NEAT1, regulated by LIN28B, promotes cell proliferation and migration through sponging miR-506 in high-grade serous ovarian cancer. Cell Death Dis 2018; 9:861. [PMID: 30154460 PMCID: PMC6113267 DOI: 10.1038/s41419-018-0908-z] [Citation(s) in RCA: 72] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 07/06/2018] [Accepted: 07/22/2018] [Indexed: 02/07/2023]
Abstract
The aberrant expression of long noncoding RNAs (lncRNAs) has been reported frequently in specific cancers, including high-grade serous ovarian cancer (HGSOC). The purpose of the present study was to explore the clinical significance and underlying mechanisms of a significantly dysregulated lncRNA (NEAT1) in HGSOC. Our results showed that elevated NEAT1 expression in human HGSOC specimens correlated with a poor prognosis. Functional experiments demonstrated that knockdown of NEAT1 significantly prohibited ovarian cancer cell proliferation and invasion in vitro and restrained tumor growth in vivo. LIN28B was identified by bioinformatics analysis along with experimental evidence as a direct actor that enhanced NEAT1 stability. A rescue functional assay confirmed that the LIN28B/NEAT1 axis contributed to oncogenic functions in ovarian cancer cells. Moreover, gene expression profile data and dual luciferase reporter assay results demonstrated that NEAT1 functioned as a competing endogenous RNA (ceRNA) for miR-506 to promote cell proliferation and migration. Taken together, our results showed that NEAT1, stabilized by LIN28B, promoted HGSOC progression by sponging miR-506. Thus, NEAT1 can be regarded as a vital diagnostic biomarker for HGSOC and a therapeutic target.
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Wang S, Zhang Q, Wang Q, Shen Q, Chen X, Li Z, Zhou Y, Hou J, Xu B, Li N, Cao X. NEAT1 paraspeckle promotes human hepatocellular carcinoma progression by strengthening IL-6/STAT3 signaling. Oncoimmunology 2018; 7:e1503913. [PMID: 30377567 DOI: 10.1080/2162402x.2018.1503913] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2018] [Revised: 07/18/2018] [Accepted: 07/20/2018] [Indexed: 02/07/2023] Open
Abstract
The formation of paraspeckle, a stress-induced nuclear body, increases in response to viral infection or proinflammatory stimuli. Paraspeckle consists of lncRNA (nuclear paraspeckle assembly transcript 1, NEAT1) and protein components including NONO, SFPQ, PSPC1, etc., which are shown to be involved in viral infection and cancer. Both NEAT1 and NONO expression increase in human hepatocellular carcinoma (HCC) samples according to TCGA data. However, the role of paraspeckle in HCC progression needs further identification. IL-6 signaling is well known to contribute to HCC progression. Here we reported that IL-6 signaling increased paraspeckle formation in HCC cells. Destruction of paraspeckle formation by silencing the paraspeckle essential components NEAT1_2 or NONO could suppress IL-6-induced STAT3 phosphorylation in HCC cells, and consequently repressed IL-6-promoted in vitro HCC cell invasion, cell cycle progression and survival. Mechanistically, paraspeckle promotes IL-6-induced STAT3 phosphorylation by binding and trapping peroxiredoxin-5 (PRDX5) mRNA in nucleus, decreasing protein level of PRDX5 which can directly interact with STAT3 and inhibit STAT3 phosphorylation. Besides, glutathione S-transferase P (GSTP1) protein, which inhibits DNA damage and apoptosis through its detoxification and anti-oxidation function, was also trapped within paraspeckles under IL-6 stimulation. Paraspeckle-trapping of both PRDX5 mRNA and GSTP1 protein contributes to IL-6-increased DNA damage in HCC cells. Our results demonstrate that paraspeckle can nuclear entrap the inhibitors of IL-6/STAT3 signaling as well as DNA damage, and then strengthen the promoting effect on HCC progression by IL-6. Therefore, paraspeckle contributes to the inflammation-related HCC progression and might be a potential therapeutic target for HCC.
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Affiliation(s)
- Shuai Wang
- Institute of Immunology, Zhejiang University School of Medicine, Hangzhou, China
| | - Qian Zhang
- National Key Laboratory of Medical Immunology and Institute of Immunology, Second Military Medical University, Shanghai, China
| | - Qinlan Wang
- Institute of Immunology, Zhejiang University School of Medicine, Hangzhou, China
| | - Qicong Shen
- National Key Laboratory of Medical Immunology and Institute of Immunology, Second Military Medical University, Shanghai, China
| | - Xiang Chen
- National Key Laboratory of Medical Immunology and Institute of Immunology, Second Military Medical University, Shanghai, China
| | - Zhenyang Li
- National Key Laboratory of Medical Immunology and Institute of Immunology, Second Military Medical University, Shanghai, China
| | - Ye Zhou
- National Key Laboratory of Medical Immunology and Institute of Immunology, Second Military Medical University, Shanghai, China
| | - Jin Hou
- National Key Laboratory of Medical Immunology and Institute of Immunology, Second Military Medical University, Shanghai, China
| | - Bowen Xu
- National Key Laboratory of Medical Immunology and Institute of Immunology, Second Military Medical University, Shanghai, China
| | - Nan Li
- National Key Laboratory of Medical Immunology and Institute of Immunology, Second Military Medical University, Shanghai, China
| | - Xuetao Cao
- Institute of Immunology, Zhejiang University School of Medicine, Hangzhou, China.,National Key Laboratory of Medical Immunology and Institute of Immunology, Second Military Medical University, Shanghai, China
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Mello SS, Attardi LD. Neat-en-ing up our understanding of p53 pathways in tumor suppression. Cell Cycle 2018; 17:1527-1535. [PMID: 29895201 DOI: 10.1080/15384101.2018.1464835] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022] Open
Abstract
Although the p53 transcription factor has a well-established role in tumor suppression, little is known about how the non-coding targets of p53 mediate its tumor suppression function. Analysis of ncRNAs regulated by p53 revealed Neat1 as a direct p53 target gene. Neat1 has physiological roles in the development and differentiation of the mammary gland and corpus luteum, but its roles in cancer have been conflicting. To unequivocally understand Neat1 function in cancer, we used Neat1 null mice. Interestingly, we found that Neat1 deficiency promotes transformation both in oncogene-expressing fibroblasts and in a mouse model for pancreatic cancer. Specifically, Neat1 loss in the pancreas results in the enhanced development of preneoplastic lesions associated with dampened expression of differentiation genes. While the exact mechanisms underlying tumor suppression are unknown, there are several described mechanisms that may be responsible for Neat1-mediated tumor suppression. Collectively, these findings suggest that Neat1 enforces differentiation to suppress pancreatic cancer.
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Affiliation(s)
- Stephano Spano Mello
- a Department of Radiation Oncology , Stanford University School of Medicine , Stanford , CA , USA
| | - Laura Donatella Attardi
- a Department of Radiation Oncology , Stanford University School of Medicine , Stanford , CA , USA.,b Stanford Cancer Institute , Stanford University School of Medicine , Stanford , CA , USA.,c Department of Genetics , Stanford University School of Medicine , Stanford , CA , USA
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