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Liu Y, Xiang Q, Yang T, Wang J, Li H. LINC01806 Promotes Breast Cancer Growth and Metastasis via Sponging miR-1286 to Disinhibit ZEB1 Expression. Biochem Genet 2024; 62:1977-1993. [PMID: 37812283 DOI: 10.1007/s10528-023-10507-5] [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: 04/27/2023] [Accepted: 08/22/2023] [Indexed: 10/10/2023]
Abstract
Breast cancer (BC) is the most abundant and aggressive cancer that impacts millions of women with poorly understood mechanisms. Here, we aimed to investigate the function of LINC01806 in BC development. Human BC tissues and nearby normal specimens were taken from diagnosed BC patients. The expression levels of LINC01806, miR-1286, ZEB1, and EMT-related markers were evaluated by qRT-PCR and western blotting. FISH was used to visualize the subcellular localization of LINC01806. The viability, proliferation, migration and invasion capacities of BC cells were assessed by MTT, colony formation, and transwell assays. Interactions among LINC01806, miR-1286 and ZEB1 were validated by dual luciferase assay. The unpaired Student t-test (for two groups) or one-way ANOVA following with Tukey post-hoc test (for more than three groups) was employed for statistical analysis. LINC01806 level was elevated in BC tissues. Knockdown of LINC01806 suppressed EMT process and BC cell proliferation, migration, and invasion. LINC01806 co-localized and directly bound with miR-1286 in the cytoplasm. MiR-1286 inhibitor blocked the effects of LINC01806 knockdown on BC cell EMT, proliferation and migration. MiR-1286 targeted ZEB1 and overexpression of ZEB1 blocked the regulatory functions of miR-1286 mimics in BC. LINC01806 facilitates EMT and accelerates BC cell proliferation, migration, and invasion via acting as miR-1286 sponge to disinhibit ZEB1 expression.
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Affiliation(s)
- Yuxiang Liu
- The Hunan Provincial University Key Laboratory of the Fundamental and Clinical Research on Functional Nucleic Acid & Medical Examination Institute, Changsha Medical University, 1501 Leifeng Dadao, Wangcheng District, Changsha, 410219, Hunan Province, China
- Hunan Key Laboratory of the Research and Development of Novel Pharmaceutical Preparations, Changsha Medical University, Changsha, 410219, Hunan Province, China
| | - Qin Xiang
- Department of Basic Biology, Changsha Medical University, Changsha, 410219, Hunan Province, China
| | - Tongwang Yang
- The Hunan Provincial University Key Laboratory of the Fundamental and Clinical Research on Functional Nucleic Acid & Medical Examination Institute, Changsha Medical University, 1501 Leifeng Dadao, Wangcheng District, Changsha, 410219, Hunan Province, China
| | - Jing Wang
- The Hunan Provincial University Key Laboratory of the Fundamental and Clinical Research on Functional Nucleic Acid & Medical Examination Institute, Changsha Medical University, 1501 Leifeng Dadao, Wangcheng District, Changsha, 410219, Hunan Province, China
| | - Hongde Li
- The Hunan Provincial University Key Laboratory of the Fundamental and Clinical Research on Functional Nucleic Acid & Medical Examination Institute, Changsha Medical University, 1501 Leifeng Dadao, Wangcheng District, Changsha, 410219, Hunan Province, China.
- Medical Examination Institute, Changsha Medical University, Changsha, 410219, Hunan Province, China.
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An Updated Review of Contribution of Long Noncoding RNA-NEAT1 to the Progression of Human Cancers. Pathol Res Pract 2023; 245:154380. [PMID: 37043964 DOI: 10.1016/j.prp.2023.154380] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/15/2023] [Revised: 02/12/2023] [Accepted: 02/16/2023] [Indexed: 02/26/2023]
Abstract
Long non-coding RNAs (lncRNAs) present pivotal roles in cancer tumorigenesis and progression. Recently, nuclear paraspeckle assembly transcript 1 (NEAT1) as a lncRNA has been shown to mediate cell proliferation, migration, and EMT in tumor cells. NEAT1 by targeting several miRNAs/mRNA axes could regulate cancer cell behavior. Therefore, NEAT1 may function as a potent biomarker for the prediction and treatment of some human cancers. In this review, we summarized various NEAT1-related signaling pathways that are critical in cancer initiation and progression.
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Zhang Y, Yu B, Tian Y, Ren P, Lyu B, Fu L, Chen H, Li J, Gong S. A novel risk score model based on fourteen chromatin regulators-based genes for predicting overall survival of patients with lower-grade gliomas. Front Genet 2022; 13:957059. [PMID: 36246611 PMCID: PMC9554745 DOI: 10.3389/fgene.2022.957059] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Accepted: 08/31/2022] [Indexed: 12/02/2022] Open
Abstract
Background: Low grade gliomas(LGGs) present vexatious management issues for neurosurgeons. Chromatin regulators (CRs) are emerging as a focus of tumor research due to their pivotal role in tumorigenesis and progression. Hence, the goal of the current work was to unveil the function and value of CRs in patients with LGGs. Methods: RNA-Sequencing and corresponding clinical data were extracted from The Cancer Genome Atlas (TCGA) and the Chinese Glioma Genome Atlas (CGGA) database. A single-cell RNA-seq dataset was sourced from the Gene Expression Omnibus (GEO) database. Altogether 870 CRs were retrieved from the published articles in top academic journals. The least absolute shrinkage and selection operator (LASSO) algorithm and Cox regression analysis were applied to construct the prognostic risk model. Patients were then assigned into high- and low-risk groups based on the median risk score. The Kaplan–Meier (K-M) survival curve and receiver operating characteristic curve (ROC) were performed to assess the prognostic value. Sequentially, functional enrichment, tumor immune microenvironment, tumor mutation burden, drug prediction, single cell analysis and so on were analyzed to further explore the value of CR-based signature. Finally, the expression of signature genes were validated by immunohistochemistry (IHC) and quantitative real-time PCR (qRT-PCR). Results: We successfully constructed and validated a 14 CRs-based model for predicting the prognosis of patients with LGGs. Moreover, we also found 14 CRs-based model was an independent prognostic factor. Functional analysis revealed that the differentially expressed genes were mainly enriched in tumor and immune related pathways. Subsequently, our research uncovered that LGGs patients with higher risk scores exhibited a higher TMB and were less likely to be responsive to immunotherapy. Meanwhile, the results of drug analysis offered several potential drug candidates. Furthermore, tSNE plots highlighting the magnitude of expression of the genes of interest in the cells from the scRNA-seq assay. Ultimately, transcription expression of six representative signature genes at the mRNA level was consistent with their protein expression changes. Conclusion: Our findings provided a reliable biomarker for predicting the prognosis, which is expected to offer new insight into LGGs management and would hopefully become a promising target for future research.
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Affiliation(s)
- Yongfeng Zhang
- Department of Neurourgery, The Second Affiliated Hospital of Xi’an Jiao Tong University, Xi’an, China
| | - Beibei Yu
- Department of Neurourgery, The Second Affiliated Hospital of Xi’an Jiao Tong University, Xi’an, China
| | - Yunze Tian
- Department of Neurourgery, The Second Affiliated Hospital of Xi’an Jiao Tong University, Xi’an, China
| | - Pengyu Ren
- Department of Neurourgery, The Second Affiliated Hospital of Xi’an Jiao Tong University, Xi’an, China
| | - Boqiang Lyu
- Department of Neurourgery, The Second Affiliated Hospital of Xi’an Jiao Tong University, Xi’an, China
| | - Longhui Fu
- Department of Neurourgery, The Second Affiliated Hospital of Xi’an Jiao Tong University, Xi’an, China
| | - Huangtao Chen
- Department of Neurourgery, The Second Affiliated Hospital of Xi’an Jiao Tong University, Xi’an, China
| | - Jianzhong Li
- Department of Thoracic Surgery, The Second Affiliated Hospital of Xi’an Jiao Tong University, Xi’an, China
- *Correspondence: Jianzhong Li, ; Shouping Gong,
| | - Shouping Gong
- Department of Neurourgery, The Second Affiliated Hospital of Xi’an Jiao Tong University, Xi’an, China
- *Correspondence: Jianzhong Li, ; Shouping Gong,
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Naz F, Tariq I, Ali S, Somaida A, Preis E, Bakowsky U. The Role of Long Non-Coding RNAs (lncRNAs) in Female Oriented Cancers. Cancers (Basel) 2021; 13:6102. [PMID: 34885213 PMCID: PMC8656502 DOI: 10.3390/cancers13236102] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/14/2021] [Accepted: 11/30/2021] [Indexed: 12/15/2022] Open
Abstract
Recent advances in molecular biology have discovered the mysterious role of long non-coding RNAs (lncRNAs) as potential biomarkers for cancer diagnosis and targets for advanced cancer therapy. Studies have shown that lncRNAs take part in the incidence and development of cancers in humans. However, previously they were considered as mere RNA noise or transcription byproducts lacking any biological function. In this article, we present a summary of the progress on ascertaining the biological functions of five lncRNAs (HOTAIR, NEAT1, H19, MALAT1, and MEG3) in female-oriented cancers, including breast and gynecological cancers, with the perspective of carcinogenesis, cancer proliferation, and metastasis. We provide the current state of knowledge from the past five years of the literature to discuss the clinical importance of such lncRNAs as therapeutic targets or early diagnostic biomarkers. We reviewed the consequences, either oncogenic or tumor-suppressing features, of their aberrant expression in female-oriented cancers. We tried to explain the established mechanism by which they regulate cancer proliferation and metastasis by competing with miRNAs and other mechanisms involved via regulating genes and signaling pathways. In addition, we revealed the association between stated lncRNAs and chemo-resistance or radio-resistance and their potential clinical applications and future perspectives.
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Affiliation(s)
- Faiza Naz
- Punjab University College of Pharmacy, Allama Iqbal Campus, University of the Punjab, Lahore 54000, Pakistan;
| | - Imran Tariq
- Punjab University College of Pharmacy, Allama Iqbal Campus, University of the Punjab, Lahore 54000, Pakistan;
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany or (S.A.); (A.S.); (E.P.)
| | - Sajid Ali
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany or (S.A.); (A.S.); (E.P.)
- Angström Laboratory, Department of Chemistry, Uppsala University, 75123 Uppsala, Sweden
| | - Ahmed Somaida
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany or (S.A.); (A.S.); (E.P.)
| | - Eduard Preis
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany or (S.A.); (A.S.); (E.P.)
| | - Udo Bakowsky
- Department of Pharmaceutics and Biopharmaceutics, University of Marburg, Robert-Koch-Str. 4, 35037 Marburg, Germany or (S.A.); (A.S.); (E.P.)
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Li J, Ouyang T, Li M, Hong T, Alriashy M, Meng W, Zhang N. CBX7 is Dualistic in Cancer Progression Based on its Function and Molecular Interactions. Front Genet 2021; 12:740794. [PMID: 34659360 PMCID: PMC8517511 DOI: 10.3389/fgene.2021.740794] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Accepted: 09/17/2021] [Indexed: 12/12/2022] Open
Abstract
Chromobox protein homolog 7 (CBX7) is a member of the Chromobox protein family and participates in the formation of the polycomb repressive complex 1(PRC1). In cells, CBX7 often acts as an epigenetic regulator to regulate gene expression. However, pathologically, abnormal expression of CBX7 can lead to an imbalance of gene expression, which is closely related to the occurrence and progression of cancers. In cancers, CBX7 plays a dual role; On the one hand, it contributes to cancer progression in some cancers by inhibiting oncosuppressor genes. On the other hand, it suppresses cancer progression by interacting with different molecules to regulate the synthesis of cell cycle-related proteins. In addition, CBX7 protein may interact with different RNAs (microRNAs, long noncoding RNAs, circular RNAs) in different cancer environments to participate in a variety of pathways, affecting the development of cancers. Furthermore, CBX7 is involved in cancer-related immune response and DNA repair. In conclusion, CBX7 expression is a key factor in the occurrence and progression of cancers.
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Affiliation(s)
- Jun Li
- Department of the Second Clinical Medical College of Nanchang University, Jiangxi Province, China
| | - Taohui Ouyang
- Department of Neurosurgery, the First Affiliated Hospital of Nanchang University, Jiangxi Province, China
| | - Meihua Li
- Department of Neurosurgery, the First Affiliated Hospital of Nanchang University, Jiangxi Province, China
| | - Tao Hong
- Department of Neurosurgery, the First Affiliated Hospital of Nanchang University, Jiangxi Province, China
| | - Mhs Alriashy
- Department of Neurosurgery, Huashan Hospital of Fudan University, Shanghai, China
| | - Wei Meng
- Department of Neurosurgery, the First Affiliated Hospital of Nanchang University, Jiangxi Province, China
| | - Na Zhang
- Department of Neurology, the First Affiliated Hospital of Nanchang University, Jiangxi Province, China
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Dou X, Ma Y, Qin Y, Dong Q, Zhang S, Tian R, Pan M. NEAT1 silencing alleviates pulmonary arterial smooth muscle cell migration and proliferation under hypoxia through regulation of miR‑34a‑5p/KLF4 in vitro. Mol Med Rep 2021; 24:749. [PMID: 34468014 DOI: 10.3892/mmr.2021.12389] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/28/2020] [Accepted: 03/29/2021] [Indexed: 11/06/2022] Open
Abstract
Pulmonary arterial hypertension (PAH) is a severe vascular disease that adversely affects patient health and can be life threatening. The present study aimed to investigate the detailed role of nuclear paraspeckle assembly transcript 1 (NEAT1) in PAH. Using RT‑qPCR, the expression levels of NEAT1, microRNA (miR)‑34a‑5p, and Krüppel‑like factor 4 (KLF4) were detected in both hypoxia‑treated pulmonary arterial smooth muscle cells (PASMCs) and serum from PAH patients. Then, the interactions among miR‑34a‑5p, NEAT1, and KLF4 were evaluated by dual‑luciferase reporter assay. The detailed role of the NEAT1/miR‑34a‑5p/KLF4 axis in PAH pathogenesis was further explored using MTT, Transwell, and western blot assays. The results revealed that NEAT1 targeted miR‑34a‑5p and miR‑34a‑5p targeted KLF4. In hypoxia‑treated PASMCs and serum from PAH patients, high NEAT1 and KLF4 expression levels and low miR‑34a‑5p expression were observed. The proliferation and migration of hypoxia‑treated PASMCs were reduced by transfection with sh‑NEAT1 or miR‑34a‑5p mimics. The suppressive effects of NEAT1 knockdown on the proliferation and migration of hypoxia‑treated PASMCs were reversed by knock down of miR‑34a‑5p expression and increased KLF4 expression. NEAT1 was not only highly expressed in the serum of PAH patients but its silencing also alleviated PAH by regulating miR‑34a‑5p/KLF4 in vitro. The present study highlighted a potential new therapeutic target and diagnostic biomarker for PAH.
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Affiliation(s)
- Xiuli Dou
- Department of Emergency, The People's Hospital of Rizhao, Rizhao, Shandong 276800, P.R. China
| | - Yuxiao Ma
- Department of Emergency, The People's Hospital of Rizhao, Rizhao, Shandong 276800, P.R. China
| | - Yijie Qin
- Department of Emergency, The People's Hospital of Rizhao, Rizhao, Shandong 276800, P.R. China
| | - Qinglin Dong
- Department of Emergency, The People's Hospital of Rizhao, Rizhao, Shandong 276800, P.R. China
| | - Shouwei Zhang
- Department of Medical, The People's Hospital of Rizhao, Rizhao, Shandong 276800, P.R. China
| | - Rui Tian
- Department of Cardiology, Beijing Anzhen Hospital, Capital Medical University, Beijing 100029, P.R. China
| | - Mingyu Pan
- Department of Cardiology, The People's Hospital of Rizhao, Rizhao, Shandong 276800, P.R. China
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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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Thankachan S, Bhardwaj BK, Venkatesh T, Suresh PS. Long Non-coding RNA NEAT1 as an Emerging Biomarker in Breast and Gynecologic Cancers: a Systematic Overview. Reprod Sci 2021; 28:2436-2447. [PMID: 33569749 DOI: 10.1007/s43032-021-00481-x] [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: 09/17/2020] [Accepted: 01/31/2021] [Indexed: 02/06/2023]
Abstract
Long non-coding RNAs (lncRNAs) are emerging regulators of cellular pathways, especially in cancer development. Among the lncRNAs, nuclear paraspeckle assembly transcript 1 (NEAT1) forms a scaffold for a nuclear body; the paraspeckle and aberrant expression of NEAT1 have been reported in breast and gynecologic cancers (ovarian, cervical, endometrial, and vulvar). Abundantly expressed NEAT1 in breast and gynecologic cancers generally contribute to tumor development by sponging its corresponding tumor-suppressive microRNAs or interacting with various regulatory proteins. The distinct expression of NEAT1 and its contribution to tumorigenic pathways make it a promising therapeutic target in breast and gynecologic cancers. Herein, we summarize the functions and molecular mechanisms of NEAT1 in human breast, ovarian, cervical, endometrial, and vulvar cancers. Furthermore, we emphasize its critical role in the formation of paraspeckle development and its functions. Conclusively, NEAT1 is a considerable biomarker with a bright prospect and can be therapeutically targeted to manage breast and gynecologic cancers.
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Affiliation(s)
- Sanu Thankachan
- School of Biotechnology, National Institute of Technology, Calicut, Kerala, 673601, India
| | | | - Thejaswini Venkatesh
- Department of Biochemistry and Molecular Biology, Central University of Kerala, Kasargod, Kerala, 671316, India
| | - Padmanaban S Suresh
- School of Biotechnology, National Institute of Technology, Calicut, Kerala, 673601, India.
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Single-cell long noncoding RNA (lncRNA) transcriptome implicates MALAT1 in triple-negative breast cancer (TNBC) resistance to neoadjuvant chemotherapy. Cell Death Discov 2021; 7:23. [PMID: 33495450 PMCID: PMC7835365 DOI: 10.1038/s41420-020-00383-y] [Citation(s) in RCA: 42] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2020] [Revised: 11/05/2020] [Accepted: 11/19/2020] [Indexed: 12/12/2022] Open
Abstract
Cumulative evidence suggests added benefit for neoadjuvant chemotherapy (NAC) in a subset of triple-negative breast cancer (TNBC) patients. Herein we identified the long noncoding RNA (lncRNA) transcriptional landscape associated with TNBC resistance to NAC, employing 1758 single cells from three extinction and three persistence TNBC patients. Using Iterative Clustering and Guide-gene Selection (ICGS) and uniform manifold approximation and projection (UMAP) dimensionality reduction analysis, we observed single cells derived from each patient to largely cluster together. Comparing the lncRNA transcriptome from single cells through the course of NAC treatment revealed minimal overlap based on lncRNA transcriptome, suggesting substantial effects of NAC on lncRNA transcription. The differential analysis revealed upregulation of 202 and downregulation of 19 lncRNAs in the persistence group, including upregulation of five different transcripts encoding for the MALAT1 lncRNA. CRISPR/Cas9-mediated MALAT1 promoter deletion in BT-549 TNBC model enhanced sensitivity to paclitaxel and doxorubicin, suggesting a role for MALAT1 in conferring resistance. Mechanistically, whole transcriptome analysis of MALAT1-KO cells revealed multiple affected mechanistic networks as well as oxidative phosphorylation canonical and angiogenesis functional category. Interestingly, lncRNA profiling of MALAT1-depleted TNBC also revealed a number of altered lncRNAs in response to MALAT1 deletion, suggesting a reciprocal relationship between MALAT1 and a number of lncRNAs, including NEAT1, USP3-AS1, and LINC-PINT, in TNBC. Elevated expression of MALAT1, USP3-AS1, and LINC-PINT correlated with worse clinical outcomes in BC patients. Our data revealed the lncRNA transactional portrait and highlighted a complex regulatory network orchestrated by MALAT1 in the context of TNBC resistance to NAC therapy.
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Exosomal lncRNA HEIH promotes cisplatin resistance in tongue squamous cell carcinoma via targeting miR-3619-5p/HDGF axis. Acta Histochem 2020; 122:151647. [PMID: 33130420 DOI: 10.1016/j.acthis.2020.151647] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2020] [Revised: 09/11/2020] [Accepted: 10/14/2020] [Indexed: 12/13/2022]
Abstract
BACKGROUND Accumulating evidence has suggested that long noncoding RNAs (lncRNAs) are involved in the progression of types of human cancers. It has been known that exosomes can mediate cell-cell crosstalk by transferring lncRNAs in tumor progression. This study aimed to investigate the role of exosomal lncRNA HEIH on cisplatin (DDP) resistance in tongue squamous cell carcinoma (TSCC). METHODS The expression of HEIH in human oral keratinocytes cell line (HOK), DDP-sensitive TSCC cell line (SCC4/S) and DDP-resistant TSCC cell line (SCC4/DDP) was measured. SCC4/S and SCC4/DDP cells were transfected with sh-HEIH to examine TSCC cell proliferation and apoptosis. The DDP-resistant exosomes were extracted and identified. The expression of miR‑3619-5p and TDGF in DDP-sensitive recipient cells was determined. The binding capacity between HEIH and miR‑3619-5p, along with miR‑3619-5p and TDGF was verified. RESULTS HEIH expression was significantly upregulated in SCC4/DDP cells. Downregulation of HEIH inhibited DDP resistance and cell proliferation and promoted cell apoptosis. HEIH acted as a competing endogenous RNA (ceRNA) for miR‑3619-5p to upregulate HDGF expression. Exosomal HEIH promoted cell proliferation and drug resistance and inhibited cell apoptosis by sponging miR‑3169-5p and upregulating HDGF. CONCLUSION Exosomal HEIH acted as a ceRNA for miR‑3619-5p to upregulate HDGF, thereby promoting DDP resistance in TSCC cells.
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Wang Y, Zhang D, Zhang C, Sun Y. The Diagnostic and Prognostic Value of Serum lncRNA NEAT1 in Colorectal Cancer. Cancer Manag Res 2020; 12:10985-10992. [PMID: 33173332 PMCID: PMC7646461 DOI: 10.2147/cmar.s269978] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2020] [Accepted: 09/10/2020] [Indexed: 12/29/2022] Open
Abstract
Background Colorectal cancer (CRC) is one of the most frequent types of gastrointestinal tract cancers. Abnormal expression of long non-coding RNAs (lncRNAs) has been shown to be closely associated with the progression of CRC. The aim of the current study was to determine the diagnostic and prognostic value of lncRNA nuclear paraspeckle assembly transcript 1 (NEAT1) in CRC. Methods The expression levels and diagnostic value of serum NEAT1 were evaluated in the training and validation cohorts. Then, the prognosis value of serum NEAT1 in CRC was further explored. Results The expression levels of serum NEAT1 were significantly higher in CRC, especially in metastatic CRC, than in colorectal adenoma and healthy controls. In addition, serum NEAT1 could well differentiate metastatic CRC from non-metastatic CRC and CRC from colorectal adenoma or healthy controls. Moreover, the metastatic CRC cells secreted more NEAT1 than the control cells. Upregulation of serum NEAT1 was significantly associated with poor clinical outcome of CRC, and serum NEAT1 was identified as an independent prognostic factor for CRC. Conclusion Serum NEAT1 might be a promising diagnostic and prognostic biomarker for CRC.
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Affiliation(s)
- Yong Wang
- Department of Colorectal Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, People's Republic of China
| | - Dongsheng Zhang
- Department of Colorectal Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, People's Republic of China
| | - Chuan Zhang
- Department of Colorectal Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, People's Republic of China
| | - Yueming Sun
- Department of Colorectal Surgery, The First Affiliated Hospital of Nanjing Medical University, Nanjing 210029, Jiangsu Province, People's Republic of China
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Li X, Gou J, Li H, Yang X. Bioinformatic analysis of the expression and prognostic value of chromobox family proteins in human breast cancer. Sci Rep 2020; 10:17739. [PMID: 33082469 PMCID: PMC7576141 DOI: 10.1038/s41598-020-74792-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Accepted: 10/07/2020] [Indexed: 02/07/2023] Open
Abstract
Chromobox (CBX) family proteins control chromatin structure and gene expression. However, the functions of CBXs in cancer progression, especially breast cancer, are inadequately studied. We assessed the significance of eight CBX proteins in breast cancer. We performed immunohistochemistry and bioinformatic analysis of data from Oncomine, GEPIA Dataset, bcGenExMiner, Kaplan–Meier Plotter, and cBioPortal. We compared mRNA and protein expression levels of eight CBX proteins between breast tumor and normal tissue. The expression difference of CBX7 was the greatest, and CBX7 was downregulated in breast cancer tissues compared with normal breast tissues. The expression of CBX2 was strongly associated with tumor stage. We further analyzed the association between the eight CBX proteins and the following clinicopathological features: menopause age, estrogen receptor (ER), progesterone receptor (PR) and HER-2 receptor status, nodal status, P53 status, triple-negative status, and the Scarff–Bloom–Richardson grade (SBR) and Nottingham prognostic index (NPI). Survival analysis in the Kaplan–Meier Plotter database showed that the eight CBX proteins were significantly associated with prognosis. Moreover, CBX genes in breast cancer patients had a high net alteration frequency of 57%. There were significant co-expression correlations between the following CBX protein pairs: CBX4 positively with CBX8, CBX6 positively with CBX7, and CBX2 negatively with CBX7. We also analyzed the Gene Ontology enrichment of the CBX proteins, including biological processes, cellular components, and molecular functions. CBX 1/2/3/5/8 may be oncogenes for breast cancer, whereas CBX 6 and 7 may be tumor suppressors for breast cancer. All eight CBX proteins may be predictive for prognosis. Clinical trials are needed to confirm the significance of the eight CBX proteins in breast cancer.
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Affiliation(s)
- Xiaomin Li
- West China School of Medicine, West China Hospital, Sichuan University, Chengdu, People's Republic of China.,Department of Breast Surgery, West China Hospital, Sichuan University, No. 37 Guoxue Alley, Wuhou District, Chengdu City, Sichuan Province, People's Republic of China
| | - Junhe Gou
- Department of Pathology, West China Hospital, Sichuan University, Chengdu, People's Republic of China
| | - Hongjiang Li
- Department of Breast Surgery, West China Hospital, Sichuan University, No. 37 Guoxue Alley, Wuhou District, Chengdu City, Sichuan Province, People's Republic of China
| | - Xiaoqin Yang
- Department of Breast Surgery, West China Hospital, Sichuan University, No. 37 Guoxue Alley, Wuhou District, Chengdu City, Sichuan Province, People's Republic of China.
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Li S, Hao J, Hong Y, Mai J, Huang W. Long Non-Coding RNA NEAT1 Promotes the Proliferation, Migration, and Metastasis of Human Breast-Cancer Cells by Inhibiting miR-146b-5p Expression. Cancer Manag Res 2020; 12:6091-6101. [PMID: 32801860 PMCID: PMC7382757 DOI: 10.2147/cmar.s252295] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 06/24/2020] [Indexed: 12/20/2022] Open
Abstract
Background Breast cancer (BC) is the most commonly diagnosed cancer in women. Tumor recurrence and metastasis are the key causes of death in BC patients. Long non-coding RNA (lncRNA) is closely associated with BC progression. lncRNA nuclear-enriched abundant transcript (NEAT)1 has been reported to regulate the proliferation and mobility of several types of cancer cells. However, how lncRNA NEAT1 affects the proliferation and invasion of BC cells is not known. Methods Quantitative real time-polymerase chain reaction (qRT-PCR) was used to measure expression of lncRNA NEAT1 and microRNA (miR)-146b-5p in BC tissues and cell lines. Cell Counting Kit (CCK)-8, cell colony-formation, wound-healing, and Transwell™ assays were undertaken to determine the effects of lncRNA NEAT1 and miR-146b-5p on progression of BC cells. The interaction between lncRNA NEAT1 and miR-146b-5p was examined by luciferase reporter, RNA-binding protein immunoprecipitation (RIP), and RNA-pulldown assays. Results Expression of lncRNA NEAT1 was upregulated in BC tissues and cell lines. High expression of lncRNA NEAT1 predicted poor overall survival in BC patients. Silencing of expression of lncRNA NEAT1 inhibited epithelial–mesenchymal transition (EMT) and suppressed the proliferation, migration and invasion of BC cells. Ectopic expression of lncRNA NEAT1 induced EMT and promoted BC progression. Mechanistic investigations revealed that miR-146b-5p was a direct target of lncRNA NEAT1, and its expression was correlated negatively with expression of lncRNA NEAT1 in BC tissues. Conclusion lncRNA NEAT1 could (i) serve as a novel prognostic marker for BC and (ii) be a potential therapeutic target for BC.
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Affiliation(s)
- Songming Li
- Department of Thyroid and Breast Surgery, Guangzhou Panyu Central Hospital, Guangzhou, People's Republic of China
| | - Junwen Hao
- Department of Thyroid and Breast Surgery, Guangzhou Panyu Central Hospital, Guangzhou, People's Republic of China
| | - Yun Hong
- Department of Thyroid and Breast Surgery, Guangzhou Panyu Central Hospital, Guangzhou, People's Republic of China
| | - Junhao Mai
- Department of Thyroid and Breast Surgery, Guangzhou Panyu Central Hospital, Guangzhou, People's Republic of China
| | - Weijun Huang
- Department of Thyroid and Breast Surgery, Guangzhou Panyu Central Hospital, Guangzhou, People's Republic of China
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