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Chen W, Wang F, Wang J, Chen F, Chen T. The Molecular Mechanism of Long Non-Coding RNA MALAT1-Mediated Regulation of Chondrocyte Pyroptosis in Ankylosing Spondylitis. Mol Cells 2022; 45:365-375. [PMID: 35680372 PMCID: PMC9200665 DOI: 10.14348/molcells.2022.2081] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Revised: 12/18/2021] [Accepted: 12/26/2021] [Indexed: 01/24/2023] Open
Abstract
Long non-coding RNAs (lncRNAs) may be important regulators in the progression of ankylosing spondylitis (AS). The competing endogenous RNA (ceRNA) activity of lncRNAs plays crucial roles in osteogenesis. We identified the mechanism of the differentially expressed lncRNA MALAT1 in AS using bioinformatic analysis and its ceRNA mechanism. The interaction of MALAT1, microRNA-558, and GSDMD was identified using integrated bioinformatics analysis and validated. Loss- and gain-of-function assays evaluated their effects on the viability, apoptosis, pyroptosis and inflammation of chondrocytes in AS. We found elevated MALAT1 and GSDMD but reduced miR-558 in AS cartilage tissues and chondrocytes. MALAT1 contributed to the suppression of cell viability and facilitated apoptosis and pyroptosis in AS chondrocytes. GSDMD was a potential target gene of miR-558. Depletion of MALAT1 expression elevated miR-558 by inhibiting GSDMD to enhance cell viability and inhibit inflammation, apoptosis and pyroptosis of chondrocytes in AS. In summary, our key findings demonstrated that knockdown of MALAT1 served as a potential suppressor of AS by upregulating miR-558 via the downregulation of GSDMD expression.
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Affiliation(s)
- Wei Chen
- Department of Orthopaedics, The First People’s Hospital of Yongkang, Affiliated to Hangzhou Medical College, Jinhua 321300, China
| | - Feilong Wang
- Department of Orthopaedics, The First People’s Hospital of Yongkang, Affiliated to Hangzhou Medical College, Jinhua 321300, China
| | - Jiangtao Wang
- Department of Orthopaedics, The First People’s Hospital of Yongkang, Affiliated to Hangzhou Medical College, Jinhua 321300, China
| | - Fuyu Chen
- Department of Orthopaedics, The First People’s Hospital of Yongkang, Affiliated to Hangzhou Medical College, Jinhua 321300, China
| | - Ting Chen
- Department of Pediatric Orthopaedic, Xinhua Hospital Affiliated to Shanghai Jiaotong University School of Medicine, Shanghai 200092, China
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Hu D, Lou X, Meng N, Li Z, Teng Y, Zou Y, Wang F. Peripheral Blood-Based DNA Methylation of Long Non-Coding RNA H19 and Metastasis-Associated Lung Adenocarcinoma Transcript 1 Promoters are Potential Non-Invasive Biomarkers for Gastric Cancer Detection. Cancer Control 2021; 28:10732748211043667. [PMID: 34615385 PMCID: PMC8504648 DOI: 10.1177/10732748211043667] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
Abstract
Introduction The early diagnosis and detection could greatly improve the clinical outcome of gastric cancer (GC) patients. However, the non-invasive biomarkers for GC detection remain to be identified. Method We used online databases (GEPIA, UALCAN, Kaplan-Meier plotter, TIMER, and MEXPRESS) to explore the association between H19 or metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) expression in tissues and the occurrence, development, prognosis, the levels of immune cell infiltration, and methylation of GC; the correlation between mRNA expression and DNA methylation levels of genes were also examined. Methylation levels of H19 or MALAT1 in peripheral blood were compared between 150 GC patients and 100 healthy controls (HCs). Predictive nomograms were constructed among female and male groups for GC diagnosis. The calibration curves, Hosmer–Lemeshow test, and decision curve analysis were also used to examine the nomograms’ predictive ability and clinical values. Results Using multiple online databases, we found that the mRNA expressions of H19 and MALAT1 in tissues were related to the occurrence of GC, and such expressions were associated with immune cell infiltration of GC and negatively correlated with DNA methylation levels of H19 and MALAT1. H19 gene, H19C island, and MALAT1B island, as well as 20 CpG sites were hypermethylated in peripheral blood of GC patients compared with HCs; similar results were also found in female and male groups (P < .05 for all). The combination of H19c3, H19c4, MALAT1b12, and age, as well as the combination of H19b7, H19c1, H19c5, and age in the nomograms could distinguish GC patients from HCs in the female group and male group, respectively. Conclusion We found statistically significant hypermethylation of H19 and MALAT1 promoters in GC patients, and meaningful sensitivity and specificity of MALAT1 and H19 methylation in discriminating GC and HCs were observed in both female and male groups, which indicates that the peripheral blood-based DNA methylation of H19 and MALAT1 could act as potential non-invasive biomarkers for the diagnosis of GC.
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Affiliation(s)
- Dingtao Hu
- Department of Oncology, 36639The First Affiliated Hospital of Anhui Medical University, China
| | - Xiaoqi Lou
- Department of Oncology, 36639The First Affiliated Hospital of Anhui Medical University, China
| | - Nana Meng
- Department of Quality Management Office, 533251The Second Affiliated Hospital of Anhui Medical University, China
| | - Zhen Li
- Department of Epidemiology and Biostatistics, School of Public Health of Anhui Medical University, China
| | - Ying Teng
- Department of Epidemiology and Biostatistics, School of Public Health of Anhui Medical University, China
| | - Yanfeng Zou
- Department of Epidemiology and Biostatistics, School of Public Health of Anhui Medical University, China
| | - Fang Wang
- Department of Oncology, 36639The First Affiliated Hospital of Anhui Medical University, China
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Peng C, Wang Y, Ji L, Kuang L, Yu Z, Li H, Zhang J, Zhao J. LncRNA-MALAT1/miRNA-204-5p/Smad4 Axis Regulates Epithelial-Mesenchymal Transition, Proliferation and Migration of Lens Epithelial Cells. Curr Eye Res 2021; 46:1137-1147. [PMID: 33327804 DOI: 10.1080/02713683.2020.1857778] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
MATERIALS AND METHODS LECs were cultured and induced with TGF-β2 (10 ng/mL). SiRNA against MALAT1 (Si-MALAT1) was transfected into LECs to knockdown the expression of MALAT1. To overexpress or knockdown miR-204-5p, miR-204-5p mimics (miR-204-5p mimics) and anti-miR-204-5p (miR-204-5p inhibitor) were transfected into LECs. We used RNA FISH to identify the location of MALAT1. RNA levels of MALAT1 and miR-204-5p were analyzed by RT-qPCR. Additionally, target protein levels of Smad4, epithelial differentiation and mesenchymal markers were analyzed with Western blot. We employed EdU Labeling to measured cell proliferation and performed Transwell Assay to analyze the cell migration. Dual-luciferase reporter assays in LECs were conducted to verify whether miRNA-204-5p was negatively regulated by MALAT1 and Smad4 was a direct target of miR-204-5p. RESULTS The expression of MALAT1 was upregulated in PCO specimens. MALAT1 was overexpressed in TGF-β2 induced LECs, and the knockdown of MALAT1 could attenuate TGF-β2 induced EMT. Besides, the upregulation of MALAT1 was correlated with the downregulation of miR-204-5p and upregulation of Smad4. Importantly, MALAT1 was revealed to be located in the cytoplasm of LECs. Furthermore, luciferase reporter assays confirmed that MALAT1 could negatively regulate the expression of miR-204-5p and then regulate its direct target Smad4. Finally, the knockdown of MALAT1 could inhibit the EMT, proliferation, and migration of LECs; however, those can be reversed by anti-miR-204-5p. CONCLUSIONS Our findings reveal that MALAT1 may regulate EMT, proliferation, and migration of LECs as a ceRNA by "sponging" miR-204-5p and targeting Smad4, and serve as a promising therapeutic target in preventing PCO.
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Affiliation(s)
- Cheng Peng
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
- Department of Ophthalmology, Eye Hospital of China Medical University, Shenyang, China
- Key Laboratory of Lens Research of Liaoning Province, Shenyang, China
| | - Yuchi Wang
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
- Department of Ophthalmology, Eye Hospital of China Medical University, Shenyang, China
- Key Laboratory of Lens Research of Liaoning Province, Shenyang, China
| | - Liyang Ji
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
- Department of Ophthalmology, Eye Hospital of China Medical University, Shenyang, China
- Key Laboratory of Lens Research of Liaoning Province, Shenyang, China
| | - Liangju Kuang
- Department of Ophthalmology, Massachusetts Eye and Ear Infirmary, Harvard Medical School, Boston, MA, USA
| | - Ziyan Yu
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
- Department of Ophthalmology, Eye Hospital of China Medical University, Shenyang, China
- Key Laboratory of Lens Research of Liaoning Province, Shenyang, China
| | - Hanrong Li
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
- Department of Ophthalmology, Eye Hospital of China Medical University, Shenyang, China
- Key Laboratory of Lens Research of Liaoning Province, Shenyang, China
| | - Jinsong Zhang
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
- Department of Ophthalmology, Eye Hospital of China Medical University, Shenyang, China
- Key Laboratory of Lens Research of Liaoning Province, Shenyang, China
| | - Jiangyue Zhao
- Department of Ophthalmology, The Fourth Affiliated Hospital of China Medical University, Shenyang, China
- Department of Ophthalmology, Eye Hospital of China Medical University, Shenyang, China
- Key Laboratory of Lens Research of Liaoning Province, Shenyang, China
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Samir A, Tawab RA, Eltayebi HM. Long non-coding RNAs XIST and MALAT1 hijack the PD-L1 regulatory signaling pathway in breast cancer subtypes. Oncol Lett 2021; 22:593. [PMID: 34149904 DOI: 10.3892/ol.2021.12854] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Accepted: 01/14/2021] [Indexed: 02/06/2023] Open
Abstract
Long non-coding RNAs (lncRNAs) have attracted widespread attention as potential biological and pathological regulators. lncRNAs are involved in several biological processes in cancer. Triple negative breast cancer (TNBC) is characterized by strong heterogeneity and aggressiveness. At present, the implication of microRNAs (miRs) and lncRNAs in immunotherapy has been poorly studied. Nevertheless, the blockade of immune checkpoints, particularly that of the programmed cell-death protein-1/programmed cell-death ligand-1 (PD-L1) axis, is considered as a principle approach in breast cancer (BC) therapy. The present study aimed to investigate the interaction between immune-modulatory upstream signaling pathways of the PD-L1 transcript that could enhance personalized targeted therapy. MDA-MB-231 cells were transfected with miR-182-5p mimics followed by RNA extraction and cDNA synthesis using a reverse transcription kit, and the expression levels of the target genes were assessed by reverse transcription-quantitative PCR. Furthermore, the expression levels of target genes were measured in tissues derived from 41 patients with BC, including patients with luminal BC and TNBC, as well as their adjacent lymph nodes. The results revealed that the expression levels of miR-182-5p, PD-L1 and metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) were upregulated in MDA-MB-231 cells and BC tissues. However, X-inactive specific transcript (XIST) expression was downregulated in cancer tissues and TNBC cells. Following co-transfection of cells with small interfering RNAs specific for each target gene and miR-182-5p antagomirs, the effect of miR-182-5p was abolished in the presence of lncRNAs. Therefore, the results of the present study indicated that although miR-182-5p exhibited an oncogenic effect, XIST exerted a dominant effect on the regulation of the PD-L1 signaling pathway via the inhibition of the oncogenic function of MALAT1.
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Affiliation(s)
- Amany Samir
- Molecular Pharmacology Research Group, Department of Pharmacology and Toxicology, German University in Cairo, Cairo 11835, Egypt
| | - Reda Abdel Tawab
- Department of General Surgery, Ain Shams University, Cairo 11772, Egypt
| | - Hend M Eltayebi
- Molecular Pharmacology Research Group, Department of Pharmacology and Toxicology, German University in Cairo, Cairo 11835, Egypt
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Hu L, Xu YN, Wang Q, Liu MJ, Zhang P, Zhao LT, Liu F, Zhao DY, Pei HN, Yao XB, Hu HG. Aerobic exercise improves cardiac function in rats with chronic heart failure through inhibition of the long non-coding RNA metastasis-associated lung adenocarcinoma transcript 1 (MALAT1). Ann Transl Med 2021; 9:340. [PMID: 33708967 PMCID: PMC7944272 DOI: 10.21037/atm-20-8250] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Abstract
Background To explore the beneficial effects and underlying mechanisms of aerobic exercise on chronic heart failure (CHF). Methods A CHF rat model was induced via left anterior descending coronary artery ligation. Four weeks post-surgery, CHF rats received aerobic exercise training over an 8-week period and cardiac function indexes including xxx were analyzed. To investigate the mechanisms involved in the aerobic exercise-induced benefits on CHF, overexpression of the long non-coding RNA MALAT1 was examined both in vivo and in vitro. Furthermore, the interaction between MALAT1 and the microRNA miR-150-5p and the downstream PI3K/Akt signaling pathway was investigated. Results Compared to the control group, the CHF rats showed evidence of left ventricular dysfunction including aggravated cardiac function indexes and lung to body weight ratio. The Masson staining demonstrated a significant degree of blue-stained fibrotic myocardial tissue in CHF rats compared to control rats. Furthermore, the levels of collagen I and collagen II were also markedly increased in CHF rats. Aerobic exercise improved cardiac function and left ventricular remodeling in rats with CHF. There was a significant reduction in the levels of the reactive oxygen species (ROS), inflammatory cytokines including TNF-α, IL-6, and IL-1β, and inflammatory mediums containing the matrix metalloproteinases (MMPs) MMP-2 and MMP-9. Moreover, CHF rats receiving aerobic exercise showed decreased myocardial apoptosis and increased expression of autophagy-related proteins including beclin-1 and LC3B-II. Overexpression of the lncRNA MALAT1 eliminated all the beneficial effects related to aerobic exercise in CHF rats. Subsequent investigations demonstrated that miR-150-5p expression was up-regulated in CHF-Tr rats and down-regulated in CHF-Tr-MALAT1 rats. Furthermore, the downstream PI3K/Akt signaling pathway was re-activated in CHF-Tr-MALAT1 rats. In vitro experiments revealed that overexpression of MALAT1 reduced the miR-150-5p levels, resulting in increased cellular apoptosis and less autophagy. In addition, overexpression of MALAT1 suppressed the downstream PI3K/Akt signaling pathway. Restoring miR-150-5p level with a miR-150-5p mimic decreased the cellular apoptosis and increased autophagy, and the downstream PI3K/Akt signaling pathway was re-activated. Conclusions Aerobic exercise improved cardiac function through inhibition of the lncRNA MALAT1 in CHF, and the potential mechanisms may be mediated via the miR-150-5p/PI3K/Akt signaling pathway.
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Affiliation(s)
- Ling Hu
- Department of Internal Medicine, Beijing Xiaotangshan Hospital, Beijing, China
| | - Ya-Nan Xu
- Department of Cardiopulmonary Rehabilitation, Beijing Xiaotangshan Hospital, Beijing, China
| | - Qian Wang
- Department of Sports Rehabilitation, Beijing Xiaotangshan Hospital, Beijing, China
| | - Mei-Jie Liu
- Medical Experiment Center, China Academy of Chinese Medical Sciences, Beijing, China
| | - Ping Zhang
- Department of Cardiology, Beijing Tsinghua Changgung Hospital affiliated with Tsinghua University, Beijing, China
| | - Lan-Ting Zhao
- Department of Cardiology, Beijing Tsinghua Changgung Hospital affiliated with Tsinghua University, Beijing, China
| | - Fang Liu
- Department of Cardiology, Beijing Tsinghua Changgung Hospital affiliated with Tsinghua University, Beijing, China
| | - Dong-Yan Zhao
- Department of Cardiopulmonary Rehabilitation, Beijing Xiaotangshan Hospital, Beijing, China
| | - He-Nan Pei
- Department of Sports Rehabilitation, Beijing Xiaotangshan Hospital, Beijing, China
| | - Xing-Bao Yao
- Department of Sports Injury, Hebei Provincial Hospital of Traditional Chinese Medicine, Shijiazhuang, China
| | - Hua-Gang Hu
- Research Office, Beijing Xiaotangshan Hospital, Beijing, China
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Liu X, Zhang P, Li Y, Zhao N, Han H. The AMPK-mTOR axis requires increased MALAT1 expression for promoting granulosa cell proliferation in endometriosis. Exp Ther Med 2021; 21:21. [PMID: 33235630 PMCID: PMC7678598 DOI: 10.3892/etm.2020.9453] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 08/12/2020] [Indexed: 02/07/2023] Open
Abstract
Endometriosis is a common reproductive disorder in women, with a global prevalence of 10-15%. Long noncoding RNAs (lncRNAs) are critical to gene transcription, cell cycle modulation and immune response. The lncRNA metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) reportedly mediates autophagy of endometrial stromal cells in endometriosis. The present study aimed to evaluate the role and mechanism of MALAT1 in granulosa cells (GCs) in endometriosis. Consequently, MALAT1 expression was upregulated in GCs obtained from patients with endometriosis and in the steroidogenic human granulosa-like tumor cell line KGN. However, MALAT1 knockdown consequently decreased the proliferation and viability of these cells, as determined by MTT and 5-ethynyl-2'-deoxyuridine staining assays. Both Annexin V-fluorescein isothiocyanate/propidium iodide flow cytometry and western blotting performed to detect proapoptotic factors indicated that MALAT1 depletion might promote KGN cell apoptosis. Furthermore, MALAT1 knockdown increased GC autophagy, as evidenced by microtubule-associated protein 1A/1B-light chain 3 (LC3) cleavage upregulation and p62 degradation. In addition, although 5'-AMP-activated protein kinase (AMPK) mRNA expression and protein levels decreased in GCs obtained from patients with endometriosis and KGN cells, MALAT1 knockdown restored AMPK levels. However, addition of BML-275 (MALAT1 inhibitor) to MALAT1-knockdown KGN cells recovered their viability and proliferative capacity and simultaneously reduced their apoptotic and autophagic capacity. Therefore, MALAT1 may regulate GC proliferation via AMPK-mTOR-mediated cell apoptosis and autophagy.
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Affiliation(s)
- Xuejie Liu
- Department of Reproductive Medicine, Affiliated Hospital of Weifang Medical University, Weifang, Shandong 261000, P.R. China
| | - Ping Zhang
- Department of Obstetrics, Zhucheng People's Hospital, Zhucheng, Shandong 262200, P.R. China
| | - Yanmin Li
- Department of Obstetrics and Gynecology, Liaocheng Second People's Hospital, Liaocheng, Shandong 252000, P.R. China
| | - Na Zhao
- Department of Obstetrics and Gynecology, Dezhou People's Hospital, Dezhou, Shandong 253000, P.R. China
| | - Haiyan Han
- Department of Reproductive Medicine, Affiliated Hospital of Weifang Medical University, Weifang, Shandong 261000, P.R. China
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Hong JH, Jin EH, Chang IA, Kang H, Lee SI, Sung JK. Association of long noncoding RNA MALAT1 polymorphisms with gastric cancer risk in Korean individuals. Mol Genet Genomic Med 2020; 8:e1541. [PMID: 33135867 PMCID: PMC7767557 DOI: 10.1002/mgg3.1541] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2020] [Revised: 10/11/2020] [Accepted: 10/13/2020] [Indexed: 12/18/2022] Open
Abstract
Background Metastasis‐associated lung adenocarcinoma transcript 1 (MALAT1) drives tumorigenesis of various human cancers. However, the association between MALAT1 variants and gastric cancer (GC) risk is unknown. We performed a case‐control study to evaluate the possible association between rs619586 and rs3200401 SNPs in MALAT and GC risk. Methods Samples from 458 patients with GC and 381 controls were genotyped using the TaqMan genotyping assay. Results In stratified analyses, we observed that rs3200401 CT in the codominant model and CT+TT in the dominant model were associated with increased GC risk in male patients (CT: odds ratio [OR] = 1.81, 95% confidence interval [CI] = 1.09–3.01, p = 0.022; CT+TT: OR = 1.74, 95% CI = 1.07–2.83, p = 0.026), and the differentiated (CT: OR =1.79, 95% CI = 1.18–2.73, p = 0.007; CT+TT: OR = 1.76, 95% CI = 1.17–2.64, p = 0.007), and intestinal (CT: OR = 1.67, 95% CI = 1.11–2.49, p = 0.013; CT+TT: OR = 1.68, 95% CI = 1.14–2.47, p = 0.009) GC subgroups. Conclusion MALAT1 rs3200401 increases GC susceptibility and might affect GC development. Further studies are needed to validate our results in large populations and different ethnic groups.
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Affiliation(s)
- Jang Hee Hong
- Clinical Trials Center, Chungnam National University Hospital, Daejeon, Republic of Korea.,Department of Pharmacology, Chungnam National University College of Medicine, Daejeon, Republic of Korea
| | - Eun-Heui Jin
- Translational Immunology Institute, Chungnam National University College of Medicine, Daejeon, Republic of Korea
| | - In Ae Chang
- Clinical Trials Center, Chungnam National University Hospital, Daejeon, Republic of Korea
| | - Hyojin Kang
- Clinical Trials Center, Chungnam National University Hospital, Daejeon, Republic of Korea
| | - Sang-Il Lee
- Department of Surgery, Chungnam National University Hospital, Chungnam National University College of Medicine, Daejeon, Republic of Korea
| | - Jae Kyu Sung
- Department of Internal Medicine, Chungnam National University Hospital, Chungnam National University College of Medicine, Daejeon, Republic of Korea
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Abstract
Long noncoding (lnc)RNAs are a group of RNAs with a length greater than 200 nt that do not encode a protein but play an essential role in regulating the expression of target genes in normal biological contexts as well as pathologic processes including tumorigenesis. The lncRNA metastasis-associated lung adenocarcinoma transcript (MALAT)-1 has been widely studied in cancer. In this review, we describe the known functions of MALAT-1; its mechanisms of action; and associated signaling pathways and their clinical significance in different cancers. In most malignancies, including lung, colorectal, thyroid, and other cancers, MALAT-1 functions as an oncogene and is upregulated in tumors and tumor cell lines. MALAT-1 has a distinct mechanism of action in each cancer type and is thus at the center of large gene regulatory networks. Dysregulation of MALAT-1 affects cellular processes such as alternative splicing, epithelial–mesenchymal transition, apoptosis, and autophagy, which ultimately results in the abnormal cell proliferation, invasion, and migration that characterize cancers. In other malignancies, such as glioma and endometrial carcinoma, MALAT-1 functions as a tumor suppressor and thus forms additional regulatory networks. The current evidence indicates that MALAT-1 and its associated signaling pathways can serve as diagnostic or prognostic biomarker or therapeutic target in the treatment of many cancers.
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Affiliation(s)
- Shijian Fu
- The First Affiliated Hospital of Harbin Medical University, Harbin 150081, People's Republic of China
| | - Yanhong Wang
- Department of Laboratory Medicine, Yuebei People's Hospital of Shaoguan, The Affiliated Hospital of Shantou University, Shaoguan 512025, People's Republic of China
| | - Hang Li
- The First Affiliated Hospital of Harbin Medical University, Harbin 150081, People's Republic of China
| | - Leilei Chen
- Department of Cardiology, Beijing Anzhen Hospital, Beijing Institute of Heart Lung and Blood Vessel Disease, Capital Medical University, Beijing 100029, People's Republic of China
| | - Quanzhong Liu
- Department of Medical Genetics, Harbin Medical University, Harbin 150081, People's Republic of China
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Hu TJ, Huang HB, Shen HB, Chen W, Yang ZH. Role of long non-coding RNA MALAT1 in chronic obstructive pulmonary disease. Exp Ther Med 2020; 20:2691-2697. [PMID: 32765763 PMCID: PMC7401856 DOI: 10.3892/etm.2020.8996] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2019] [Accepted: 11/06/2019] [Indexed: 12/15/2022] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a pathological inflammatory condition of the lungs that is associated with high rates of mortality. Although long non-coding RNAs (lncRNAs) serve a role in lung diseases, their functions in COPD pathogenesis are relatively unknown. The present study aimed to assess the role of differentially expressed lncRNAs in COPD. Expression profile analysis of six lncRNAs in age-matched COPD and non-COPD tissues were conducted. Among the six tested lncRNAs, metastasis-associated in lung adenocarcinoma transcript 1 (MALAT1) was the most consistently overexpressed in COPD lung tissue specimens. To model COPD in vitro, human lung fibroblasts were treated with transforming growth factor-β (TGF-β) and MALAT1 was knocked down by small interfering RNA. This promoted cell viability and concurrently inhibited the expression of mesenchymal proteins, fibronectin and α-smooth muscle actin. In COPD, cell senescence is linked to the activation of mammalian target of rapamycin complex 1 (mTORC1). Upon gene silencing of MALAT1 in non-TGF-β-treated cells, cells demonstrated constitutive activation of mTORC1, which was assessed by the protein expression levels of mTORC1 substrate S6 kinase (S6K1). By contrast, upon MALAT1 silencing in the TGF-β-treated cells, mTORC1 activation was not suppressed, despite the mesenchymal cell markers protein expression levels being downregulated. Thus, lncRNA MALAT1 may represent a potent biomarker in COPD patients and may act as a target for both diagnostic and therapeutic purposes.
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Affiliation(s)
- Tian-Jun Hu
- Department of Thoracic Surgery, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang 315012, P.R. China
| | - Hong-Bo Huang
- Department of Thoracic Surgery, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang 315012, P.R. China
| | - Hai-Bo Shen
- Department of Thoracic Surgery, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang 315012, P.R. China
| | - Wei Chen
- Zhongyuan Union Clinical Laboratory Co. Ltd., Tianjin 300384, P.R. China
- Zhongyuan-Vcan Genetic Technology Co. Ltd., Beijing 100176, P.R. China
| | - Zhen-Hua Yang
- Department of Thoracic Surgery, Hwa Mei Hospital, University of Chinese Academy of Sciences, Ningbo, Zhejiang 315012, P.R. China
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Abstract
Aims The purpose of this study was to investigate the potential correlation between metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) and the transcription factor BTB and CNC homology 1 (BACH1) and their clinicopathological significance in triple-negative breast cancer (TNBC). Subjects and Methods MALAT1 and BACH1 were detected by immunohistochemistry using TNBC tissue microarrays of 240 patients. The association between MALAT1 and BACH1 expression levels was statistically analyzed. Moreover, the prognostic roles as well as clinical and pathological significance of MALAT1 and BACH1 expression in TNBC were determined. Statistical Analysis Used Two-tailed Pearson correlation was used to examine the correlation of BACH1 and MALA1 expression. Comparisons of clinicopathological variables between different BACH1 and MALA1 expression groups were performed using χ2 tests. Overall survival (OS) and disease-free survival (DFS) curves were plotted with the Kaplan-Meier method and the differences in OS and DFS between three groups were compared by the log-rank test. Multiple comparisons were performed using χ2 tests for subsequent individual group comparisons. Results MALAT1 and BACH1 expression was significantly correlated with tumor-node-metastasis stage, distant metastasis, pathological stage, and survival outcomes of patients. Patients with high MALAT1 and BACH1 expression exhibited shorter overall survival and disease-free survival. Conclusions These findings provide further insight into the expression pattern of MALAT1 and BACH1 in TNBC and suggest them as prognostic biomarkers for TNBC.
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Affiliation(s)
- Xueqi Ou
- Department of Breast Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Guanfeng Gao
- Department of Breast Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Meiheban Bazhabayi
- Department of Breast Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Kaiming Zhang
- Department of Breast Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Feng Liu
- Department of Breast Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
| | - Xiangsheng Xiao
- Department of Breast Oncology, Sun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Guangzhou, Guangdong, China
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Huang K, Yu X, Yu Y, Zhang L, Cen Y, Chu J. Long noncoding RNA MALAT1 promotes high glucose-induced inflammation and apoptosis of vascular endothelial cells by regulating miR-361-3p/SOCS3 axis. Int J Clin Exp Pathol 2020; 13:1243-1252. [PMID: 32509100 PMCID: PMC7270668] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 03/09/2020] [Accepted: 04/14/2020] [Indexed: 06/11/2023]
Abstract
Vascular complications are the important pathophysiologic manifestations of patients with diabetes mellitus (DM) and many long non-coding RNAs (LncRNAs) are involved in this process. In this study, we aimed to investigate the relationships among LncRNA metastasis-associated lung adenocarcinoma transcript 1 (MALAT1), microRNA-361-3p (miR-361-3p), and suppressor of cytokine signaling 3 (SOCS3) in high glucose (HG)-induced human umbilical vein endothelial cell (HUVEC) injury and its underlying mechanism. We found that HG treatment significantly promotes MALAT1 and SOCS3 expressions, but inhibits miR-361-3p expression in HUVECs. Furthermore, through bioinformatics analysis and dual luciferase assay, we found that MALAT1 directly sponges miR-361-3p to counteract its suppression on SOCS3 expression. Moreover, knockdown of MALAT1 evidently inhibits HG-induced inflammatory factors, including tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) and IL-6 expressions in HUVECs (and HUVEC apoptosis) by regulating the miR-361-3p/SOCS3 axis. In conclusion, our results indicate that knockdown of MALAT1 inhibits HG-induced vascular endothelial injury through regulating miR-361-3p/SOCS3 axis, suggesting that inhibition of MALAT1 as a potential target for endothelial injury therapy for DM.
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Affiliation(s)
- Kai Huang
- Department of General Practice, Ningbo First Hospital Ningbo, P. R. China
| | - Xuxia Yu
- Department of General Practice, Ningbo First Hospital Ningbo, P. R. China
| | - Yushan Yu
- Department of General Practice, Ningbo First Hospital Ningbo, P. R. China
| | - Lu Zhang
- Department of General Practice, Ningbo First Hospital Ningbo, P. R. China
| | - Yin Cen
- Department of General Practice, Ningbo First Hospital Ningbo, P. R. China
| | - Jinguo Chu
- Department of General Practice, Ningbo First Hospital Ningbo, P. R. China
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12
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Chaleshi V, Irani S, Alebouyeh M, Mirfakhraie R, Aghdaei HA. Association of lncRNA-p53 regulatory network (lincRNA-p21, lincRNA-ROR and MALAT1) and p53 with the clinicopathological features of colorectal primary lesions and tumors. Oncol Lett 2020; 19:3937-3949. [PMID: 32391102 PMCID: PMC7204634 DOI: 10.3892/ol.2020.11518] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2018] [Accepted: 10/10/2019] [Indexed: 01/20/2023] Open
Abstract
Colorectal cancer (CRC) is a common intestinal cancer with a high mortality rate. Early detection of this type of cancer is fundamental to the prevention of the disease, which results in improved survival rates. In the human colon tissue, transition from normal epithelium to adenoma is considered to be caused by unknown molecular incidents occurring over 5-10 years. The detection of CRC has proved problematic when in the early stages of disease. In addition, identifying suitable biomarkers for the detection of CRC progress in patients remains one of the most significant challenges. Long non-coding RNAs have been demonstrated to contribute to the promotion of CRC. The aim of the present study was to investigate the clinical and biological significance of long intergenic non-coding (linc)RNA-p21, lincRNA-regulator of reprogramming (ROR) and metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) in the colon tumor and polyp tissue, and the association that these have with the expression of p53 at the mRNA level. Neoplastic and paired adjacent normal tissue samples were obtained from 72 patients (46 polyps and 26 tumors). Reverse transcription-quantitative PCR was performed to determine the relative fold changes in the expression of lincRNA-p21, lincRNA-RoR, MALAT1 and p53 in the samples. A significant association was observed between the levels of MALAT1 and p53 in neoplasm tissues (R=0.073; P<0.05). The relative expression of the MALAT1 gene revealed a statistically significant difference between the different polyp types and number of polyps (P=0.0028 and 0.022, respectively). Adjuvant therapy in patients with tumors revealed an association between the levels of lincRNA-ROR and lincRNA-p21 expression (P=0.015 and 0.038, respectively). MALAT1 may be selected as an early detection biomarker for CRC. Furthermore, lincRNA-ROR and lincRNA-p21 may serve as prognostic and therapeutic biomarkers in patients with CRC.
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Affiliation(s)
- Vahid Chaleshi
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran 1477893855, Iran
| | - Shiva Irani
- Department of Biology, Science and Research Branch, Islamic Azad University, Tehran 1477893855, Iran
| | - Masoud Alebouyeh
- Foodborne and Waterborne Diseases Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran 1985717413, Iran
| | - Reza Mirfakhraie
- Department of Medical Genetics, Shahid Beheshti University of Medical Sciences, Tehran 1985717443, Iran
| | - Hamid Asadzadeh Aghdaei
- Basic and Molecular Epidemiology of Gastrointestinal Disorders Research Center, Research Institute for Gastroenterology and Liver Diseases, Shahid Beheshti University of Medical Sciences, Tehran 1985717413, Iran
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13
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Ou M, Zhao H, Ji G, Zhao X, Zhang Q. Long noncoding RNA MALAT1 contributes to pregnancy-induced hypertension development by enhancing oxidative stress and inflammation through the regulation of the miR-150-5p/ET-1 axis. FASEB J 2020; 34:6070-6085. [PMID: 32246794 DOI: 10.1096/fj.201902280r] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 01/06/2020] [Accepted: 02/02/2020] [Indexed: 12/21/2022]
Abstract
Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) has been identified previously in the pathogenesis of hypertension and some gestational diseases. However, the biological functions of MALAT1 in pregnancy-induced hypertension (PIH) are still poorly understood. Herein, we aim to explore the functional relevance of MALAT1 in PIH and to explain the potential underlying mechanisms. We found that the levels of ET-1 and MALAT1 were upregulated and that of miR-150-5p were downregulated in the serum of pregnant women with PIH and the aortic endothelial cells (ECs) of reduced uterine perfusion pressure (RUPP)-induced rat models. In aortic ECs, MALAT1 could competitively bind to miR-150-5p to upregulate the expression of ET-1. The MALAT1/miR-150-5p/ET-1 axis regulated the expression of endothelin B receptor (ETBR) in aortic ECs leading to oxidative stress imbalance and increased the release of proinflammatory cytokines (IL-18 and IL-1β), which concurrently activated the NF-κB pathway to regulate the ETBR expression and to stimulate smooth muscle cell (SMC) contraction. Furthermore, silencing MALAT1 could alleviate the hypertensive symptoms of RUPP-induced rat models. Taken conjointly, the upregulation of MALAT1 can reduce the expression of ET-1 by competitively binding to miR-150-5p, which enhances the expression of ETBR via the activation of the NF-κB pathway in SMCs, thus exacerbating the hypertensive symptoms in the RUPP-induced rat models.
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Affiliation(s)
- Minghui Ou
- Department of Vascular Surgery, Qingdao Municipal Hospital, Qingdao, P.R. China
| | - Huidong Zhao
- Department of Obstetrics, Qingdao Municipal Hospital, Qingdao, P.R. China
| | - Guoxin Ji
- Department of Obstetrics, Qingdao Municipal Hospital, Qingdao, P.R. China
| | - Xin Zhao
- Department of Obstetrics, Qingdao Municipal Hospital, Qingdao, P.R. China
| | - Qian Zhang
- Department of Obstetrics, Qingdao Municipal Hospital, Qingdao, P.R. China
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14
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张 洋, 郭 海, 马 莉, 朱 锦, 郭 安, 何 勇. [Study on adsorption of microRNA-124 by long chain non-coding RNA MALAT1 regulates osteogenic differentiation of mesenchymal stem cells]. Zhongguo Xiu Fu Chong Jian Wai Ke Za Zhi 2020; 34:240-245. [PMID: 32030958 PMCID: PMC8171964 DOI: 10.7507/1002-1892.201906025] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Received: 06/08/2019] [Revised: 12/06/2019] [Indexed: 11/03/2022]
Abstract
OBJECTIVE To investigate the regulatory effect of long chain non-coding RNA (lncRNA) metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) adsorbing microRNA-124 (miR-124) on osteogenic differentiation of mesenchymal stem cells (MSCs). METHODS C3H10T1/2 cells derived from mouse embryos were cultured in vitro, then randomly divided into control group (group A), lncRNA MALAT1 no-load plasmid group (group B), lncRNA MALAT1 overexpression plasmid group (group C), lncRNA MALAT1 small interfering RNA (siRNA) group (group D), and lncRNA MALAT1 siRNA negative control group (group E). The cells were transfected into plasmids and siRNA, then induced to differentiate into osteoblasts. Alkaline phosphatase (ALP) and alizarin red staining were used to detect the osteogenic differentiation of cells in each group, real-time fluorescence quantitative (qRT-PCR) analysis was used to detect the expressions of lncRNA MALAT, miR-124, and osteogenesis-related genes such as Runt-related transcription factor 2 (Runx2), osteopontin (OPN), and osteocalcin (OCN) in each group. Double luciferase reporter gene was used to detect the targeting regulation of lncRNA MALAT1 to miR-124. RESULTS The relative contents of ALP positive cells, mineralized nodule, and the relative mRNA expressions of lncRNA MALAT1, Runx2, OPN, and OCN in group C were significantly higher than those in other groups ( P<0.05), while in group D significantly lower than in other groups ( P<0.05); the relative expression of miR-124 in group C was significantly lower than that in other groups( P<0.05), while in group D significantly higher than in other groups ( P<0.05). There was no significant difference in these indexes between groups A, B, and E ( P>0.05). The results of double luciferase reporter gene assay showed that lncRNA MALAT1 targeting down-regulated the expression of miR-124. CONCLUSION LncRNA MALAT1 can targeting down-regulate the expression of miR-124 and promote the osteogenic differentiation of MSCs.
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Affiliation(s)
- 洋 张
- 深圳大学总医院关节创伤科(广东深圳 518055)Department of Joint Trauma, General Hospital of Shenzhen University, Shenzhen Guangdong, 518055, P.R.China
| | - 海 郭
- 深圳大学总医院关节创伤科(广东深圳 518055)Department of Joint Trauma, General Hospital of Shenzhen University, Shenzhen Guangdong, 518055, P.R.China
| | - 莉 马
- 深圳大学总医院关节创伤科(广东深圳 518055)Department of Joint Trauma, General Hospital of Shenzhen University, Shenzhen Guangdong, 518055, P.R.China
| | - 锦宇 朱
- 深圳大学总医院关节创伤科(广东深圳 518055)Department of Joint Trauma, General Hospital of Shenzhen University, Shenzhen Guangdong, 518055, P.R.China
| | - 安运 郭
- 深圳大学总医院关节创伤科(广东深圳 518055)Department of Joint Trauma, General Hospital of Shenzhen University, Shenzhen Guangdong, 518055, P.R.China
| | - 勇 何
- 深圳大学总医院关节创伤科(广东深圳 518055)Department of Joint Trauma, General Hospital of Shenzhen University, Shenzhen Guangdong, 518055, P.R.China
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15
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Wu S, Chen H, Zuo L, Jiang H, Yan H. Suppression of long noncoding RNA MALAT1 inhibits the development of uveal melanoma via microRNA-608-mediated inhibition of HOXC4. Am J Physiol Cell Physiol 2020; 318:C903-C912. [PMID: 31913701 DOI: 10.1152/ajpcell.00262.2019] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
This study explored the effects of the metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) on the development of uveal melanoma. Moreover, the role of the MALAT1/microRNA-608 (miR-608)/homeobox C4 (HOXC4) axis was assessed by evaluating the proliferation, invasion, and migration, as well as the cell cycle distribution of uveal melanoma in vitro after knocking down MALAT1 or HOXC4 and/or overexpression of miR-608 in uveal melanoma cells (MUM-2B and C918). Moreover, the effects of the MALAT1/miR-608/HOXC4 axis in uveal melanoma in vivo were further evaluated by injecting the C918 cells into the NOD/SCID mice. HOXC4 was found to be a gene upregulated in uveal melanoma, while knockdown of its expression resulted in suppression of uveal melanoma cell migration, proliferation, and invasion, as well as cell cycle progression. In addition, the upregulation of miR-608 reduced the expression of HOXC4 in the uveal melanoma cells, which was rescued by overexpression of MALAT1. Hence, MALAT1 could upregulate the HOXC4 by binding to miR-608. The suppressed progression of uveal melanoma in vitro by miR-608 was rescued by overexpression of MALAT1. Additionally, in vivo assays demonstrated that downregulation of MALAT1 could suppress tumor growth through downregulation of HOXC4 expression via increasing miR-608 in uveal melanoma. In summary, MALAT1 downregulation functions to restrain the development of uveal melanoma via miR-608-mediated inhibition of HOXC4.
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Affiliation(s)
- Shuai Wu
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, People's Republic of China
| | - Han Chen
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, People's Republic of China
| | - Ling Zuo
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, People's Republic of China
| | - Hai Jiang
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, People's Republic of China
| | - Hongtao Yan
- Department of Ophthalmology, The Second Hospital of Jilin University, Changchun, People's Republic of China
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16
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Yuan LT, Chang JH, Lee HL, Yang YC, Su SC, Lin CL, Yang SF, Chien MH. Genetic Variants of lncRNA MALAT1 Exert Diverse Impacts on the Risk and Clinicopathologic Characteristics of Patients with Hepatocellular Carcinoma. J Clin Med 2019; 8:jcm8091406. [PMID: 31500187 PMCID: PMC6780489 DOI: 10.3390/jcm8091406] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2019] [Revised: 08/26/2019] [Accepted: 09/03/2019] [Indexed: 02/07/2023] Open
Abstract
The long noncoding (lnc)RNA, metastasis-associated lung adenocarcinoma transcript 1 (MALAT1), plays a crucial role in the development of hepatocellular carcinoma (HCC). However, potential genetic variants (single nucleotide polymorphisms, SNPs) in MALAT1 that affect the susceptibility and progression of HCC have rarely been explored. Three tagging SNPs, viz., rs3200401 C > T, rs619586 A > G, and rs1194338 C > A, in MALAT1 were genotyped by a TaqMan allelic discrimination assay in 394 HCC patients and 1199 healthy controls. A stratified analysis showed that younger patients (<55 years) with the MALAT1 rs619586 G allele had a decreased risk of HCC under a codominant model (AOR = 0.289, 95% CI: 0.108–0.773, p = 0.013) and dominant model (AOR = 0.286, 95% CI: 0.107–0.765, p = 0.013). Female patients and patients with a smoking habit who carried the CA + AA genotype of rs1194338 had a lower risk of developing vascular invasion (p = 0.049) and a high Child–Pugh grade (B or C) (p = 0.036), respectively. Under the dominant model, smokers with the MALAT1 rs3200401 CT + TT genotype had a higher frequency of hepatitis B virus (HBV) infection (p = 0.034). Moreover, the aspartate aminotransferase was higher in patients with the rs3200401 CT + TT genotype. Furthermore, analyses of clinical datasets revealed that MALAT1 expression level was gradually unregulated during HCC development from normal liver, cirrhotic liver, dysplastic liver to HCC and correlated with poor survival rates in HCC patients, especially in the hepatitis virus-infected population.
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Affiliation(s)
- Lan-Ting Yuan
- Division of Hepatology and Gastroenterology, Department of Internal Medicine, Yuan's General Hospital, Kaohsiung 80249, Taiwan
| | - Jer-Hwa Chang
- Department of Internal Medicine, School of Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
- Pulmonary Research Center, Wan Fang Hospital, Taipei Medical University, Taipei 11696, Taiwan
| | - Hsiang-Lin Lee
- School of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan
- Department of Surgery, Chung Shan Medical University Hospital, Taichung 40201, Taiwan
| | - Yi-Chieh Yang
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan
| | - Shih-Chi Su
- Whole-Genome Research Core Laboratory of Human Diseases, Chang Gung Memorial Hospital, Keelung 20401, Taiwan
| | - Chien-Liang Lin
- Department of Pharmacy, FooYin University Hospital, Pingtung 92847, Taiwan
| | - Shun-Fa Yang
- Institute of Medicine, Chung Shan Medical University, Taichung 40201, Taiwan.
- Department of Medical Research, Chung Shan Medical University Hospital, Taichung 40201, Taiwan.
| | - Ming-Hsien Chien
- Pulmonary Research Center, Wan Fang Hospital, Taipei Medical University, Taipei 11696, Taiwan.
- Graduate Institute of Clinical Medicine, College of Medicine, Taipei Medical University, Taipei 11031, Taiwan.
- TMU Research Center of Cancer Translational Medicine, Taipei Medical University, Taipei 11031, Taiwan.
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17
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Cui RJ, Fan JL, Lin YC, Pan YJ, Liu C, Wan JH, Wang W, Jiang ZY, Zheng XL, Tang JB, Yu XG. miR-124-3p availability is antagonized by LncRNA-MALAT1 for Slug-induced tumor metastasis in hepatocellular carcinoma. Cancer Med 2019; 8:6358-6369. [PMID: 31466138 PMCID: PMC6797582 DOI: 10.1002/cam4.2482] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2019] [Revised: 07/09/2019] [Accepted: 07/27/2019] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND As an oncogene, long noncoding RNA metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) can promote tumor metastasis. Hyperexpression of MALAT1 has been observed in many malignant tumors, including hepatocellular carcinoma (HCC). However, the role and mechanism of MALAT1 in HCC remain unclear. METHODS Thirty human HCC and paracancerous tissue specimens were collected, and the human hepatoma cell lines Huh7 and HepG2 were cultured according to standard methods. MALAT1 and Snail family zinc finger (Slug) expression were measured by real-time PCR, immunohistochemistry, and western blotting. Luciferase reporter assay and RNA immunoprecipitation (RIP) assay verified the direct interaction between miR-124-3p and Slug(SNAI2) or MALAT1. Wound healing and transwell assays were performed to examine invasion and migration, and a subcutaneous tumor model was established to measure tumor progression in vivo. RESULTS MALAT1 expression was upregulated in HCC tissues and positively correlated with Slug expression. MALAT1 and miR-124-3p bind directly and reversibly to each other. MALAT1 silencing inhibited cell migration and invasion. miR-124-3p inhibited HCC metastasis by targeting Slug. CONCLUSIONS MALAT1 regulates Slug through miR-124-3p, affecting HCC cell metastasis. Thus, the MALAT1/miR-124-3p/Slug axis plays an important role in HCC.
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Affiliation(s)
- Rong-Jun Cui
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang, China.,Department of Biochemistry and Molecular Biology, Mudanjiang Medical University, Mudanjiang, Heilongjiang, China
| | - Jia-Lin Fan
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang, China.,The Second People's Hospital of Lishui, Lishui, Zhejiang, China
| | - Yu-Cui Lin
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Yu-Jia Pan
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Chi Liu
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Jia-Hui Wan
- Department of Biochemistry and Molecular Biology, Mudanjiang Medical University, Mudanjiang, Heilongjiang, China
| | - Wei Wang
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Zheng-Yuan Jiang
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang, China
| | - Xiu-Lan Zheng
- Department of Ultrasonography, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Jie-Bing Tang
- Department of Gastrointestinal Medical Oncology, Harbin Medical University Cancer Hospital, Harbin, Heilongjiang, China
| | - Xiao-Guang Yu
- Department of Biochemistry and Molecular Biology, Harbin Medical University, Harbin, Heilongjiang, China
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18
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Liu SX, Zheng F, Xie KL, Xie MR, Jiang LJ, Cai Y. Exercise Reduces Insulin Resistance in Type 2 Diabetes Mellitus via Mediating the lncRNA MALAT1/MicroRNA-382-3p/Resistin Axis. Mol Ther Nucleic Acids 2019; 18:34-44. [PMID: 31479923 PMCID: PMC6726922 DOI: 10.1016/j.omtn.2019.08.002] [Citation(s) in RCA: 47] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/17/2019] [Revised: 07/24/2019] [Accepted: 08/01/2019] [Indexed: 12/13/2022]
Abstract
Insulin resistance (IR) is the primary pathological mechanism underlying type 2 diabetes mellitus (T2DM). Here, the study aimed to ascertain whether and how exercise mediates IR in T2DM. An in vivo mouse model of high-fat diet-induced IR and an in vitro high-glucose-induced IR model were constructed. High long non-coding RNA (lncRNA) metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) expression was detected in T2MD and was positively correlated with HOMA-IR and resistin levels. Then, short hairpin RNA targeting MALAT1 (sh-MALAT1) or pcDNA-MALAT1 was delivered into human umbilical vein endothelial cells (HUVECs) to knock down or upregulate its expression, respectively. Silencing of MALAT1 resulted in reduced levels of resistin, Ang II, tumor necrosis factor alpha (TNF-α), interleukin-6 (IL-6), soluble intercellular adhesion molecule-1 (sICAM-1), soluble vascular cell adhesion molecule-1 (sVCAM-1), endothelin-1 (ET-1), and p-insulin receptor substrate-1 (p-IRS)/ISR-1, and decreased cell migration, as well as enhanced glucose uptake and levels of nitric oxide (NO) and p-Akt/Akt. In the IR mouse model, exercise was observed to downregulate MALAT1 to reduce resistin, whereby exercise reduced homeostatic model assessment-insulin resistance (HOMA-IR). Besides, exercise also elevated microRNA-382-3p (miR-382-3p) expression in the serum of IR mice. Dual-luciferase reporter and RNA binding protein immunoprecipitation (RIP) assays identified that MALAT1 could bind to miR-382-3p to upregulate resistin. Collectively, the key observations of the study provide evidence that inhibition of MALAT1 elevates miR-382-3p to repress resistin, which consequently underlies the mechanism of exercise protecting against IR, highlighting a direction for T2DM therapy development.
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Affiliation(s)
- Sui-Xin Liu
- Cardiac Rehabilitation Center, Department of Rehabilitation, Xiangya Hospital, Central South University, Changsha 410008, P.R. China
| | - Fan Zheng
- Cardiac Rehabilitation Center, Department of Rehabilitation, Xiangya Hospital, Central South University, Changsha 410008, P.R. China
| | - Kang-Ling Xie
- Cardiac Rehabilitation Center, Department of Rehabilitation, Xiangya Hospital, Central South University, Changsha 410008, P.R. China
| | - Mu-Rong Xie
- Cardiac Rehabilitation Center, Department of Rehabilitation, Xiangya Hospital, Central South University, Changsha 410008, P.R. China
| | - Ling-Jun Jiang
- Cardiac Rehabilitation Center, Department of Rehabilitation, Xiangya Hospital, Central South University, Changsha 410008, P.R. China
| | - Ying Cai
- Cardiac Rehabilitation Center, Department of Rehabilitation, Xiangya Hospital, Central South University, Changsha 410008, P.R. China.
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19
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Cheng Y, Li J, Wang C, Yang H, Wang Y, Zhan T, Guo S, Liang J, Bai Y, Yu J, Liu G. Inhibition of long non-coding RNA metastasis-associated lung adenocarcinoma transcript 1 attenuates high glucose-induced cardiomyocyte apoptosis via regulation of miR-181a-5p. Exp Anim 2019; 69:34-44. [PMID: 31353329 PMCID: PMC7004813 DOI: 10.1538/expanim.19-0058] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
Diabetic cardiomyopathy (DCM) is one of the cardiovascular complications of diabetes
mellitus independent of hypertension, coronary disease, and other heart diseases. The
development of DCM is multifactorial and hard to detect at an early stage. Long non-coding
RNA metastasis-associated lung adenocarcinoma transcript 1 (Malat1) is
emerging as a regulator of DCM, the underlying mechanism of its role in DCM has not been
elaborated yet. In this study, we established a mouse DCM model via streptozocin injection
as evidenced by cell hypertrophy and cell apoptosis of myocardial tissue, and found that
Malat1 expression was upregulated in the myocardium in DCM mice.
Meanwhile, elevated expression of pro-apoptotic factors p53, p21, cleaved caspase 3,
cleaved caspase 9 and BAX, and down-regulation of anti-apoptotic BCL-2 were observed in
DCM myocardium. We further investigated the effect of Malat1 on
cardiomyocytes under high glucose condition by silencing Malat1 with its
specific short-hairpin RNA. Like in vivo, expression of
Malat1 in cardiomyocytes was notably raised, remarkable cell apoptosis
and changes in apoptosis-related factors were also observed following high glucose
treatment. Besides, we validated that Malat1 acted as a sponge of
miR-181a-5p. Inhibition of miR-181a-5p could, at least partially, abolish
Malat1 knockdown-induced alteration in cardiomyocytes. In addition,
p53, a critical regulator of apoptosis, was validated to be a downstream target of
miR-181a-5p. In summary, our findings reveal that Malat1 knockdown
attenuates high glucose-induced cardiomyocyte apoptosis via releasing miR-181a-5p, and
this mechanism may provide us with new diagnosis target of DCM.
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Affiliation(s)
- Yongxia Cheng
- Pathology Diagnosis Center, The First Clinical Medical School of Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China.,Key Laboratory of Cancer Prevention and Treatment of Heilongjiang Province, Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China.,Institute of Stem Cells, Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China
| | - Jingchao Li
- Department of Neurology, Hongqi Hospital of Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China
| | - Chong Wang
- Pathology Diagnosis Center, The First Clinical Medical School of Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China
| | - Heran Yang
- Department of Laboratory Medicine, Hongqi Hospital of Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China
| | - Ying Wang
- Department of Anatomy, School of Basic Medical Sciences, Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China.,Institute of Neural Tissue Engineering, Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China
| | - Tao Zhan
- Pathology Diagnosis Center, The First Clinical Medical School of Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China
| | - Sufen Guo
- Pathology Diagnosis Center, The First Clinical Medical School of Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China
| | - Jun Liang
- Institute of Stem Cells, Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China.,Department of Histology and Embryology, School of Basic Medical Sciences, Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China
| | - Yuxin Bai
- Pathology Diagnosis Center, The First Clinical Medical School of Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China
| | - Jianbo Yu
- Pathology Diagnosis Center, The First Clinical Medical School of Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China.,Key Laboratory of Cancer Prevention and Treatment of Heilongjiang Province, Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China
| | - Guibo Liu
- Department of Anatomy, School of Basic Medical Sciences, Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China.,Institute of Neural Tissue Engineering, Mudanjiang Medical College, No. 3 Tongxiang Street, Aimin District, Mudanjiang, Heilongjiang 157011, P.R.China
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Wei L, Li J, Han Z, Chen Z, Zhang Q. Silencing of lncRNA MALAT1 Prevents Inflammatory Injury after Lung Transplant Ischemia-Reperfusion by Downregulation of IL-8 via p300. Mol Ther Nucleic Acids 2019; 18:285-297. [PMID: 31604167 PMCID: PMC6796730 DOI: 10.1016/j.omtn.2019.05.009] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2019] [Accepted: 05/17/2019] [Indexed: 12/15/2022]
Abstract
Ischemia-reperfusion injury is a common early complication after lung transplantation. It was reported that long non-coding RNA (lncRNA) metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) is involved in ischemia-reperfusion injury and regulates inflammation. This study aimed to explore the role of MALAT1 in inflammatory injury following lung transplant ischemia-reperfusion (LTIR). A LTIR rat model was successfully established, with the expression of MALAT1 and interleukin-8 (IL-8) in lung tissues detected. Then, in vitro loss- and gain-of-function investigations were conducted to evaluate the effect of MALAT1 on pulmonary epithelial cell apoptosis and IL-8 expression. The relationship among MALAT1, p300, and IL-8 was tested. Moreover, a sh-MALAT1-mediated model of LTIR was established in vivo to examine inflammatory injury and chemotaxis infiltration. Both IL-8 and MALAT1 were highly expressed in LTIR. MALAT1 interacted with p300 to regulate the IL-8 expression by recruiting p300. Importantly, silencing of MALAT1 inhibited the chemotaxis of neutrophils by downregulating IL-8 expression via binding to p300. Besides, MALAT1 silencing alleviated the inflammatory injury after LTIR by downregulating IL-8 and inhibiting infiltration and activation of neutrophils. Collectively, these results demonstrated that silencing of MALAT1 ameliorated the inflammatory injury after LTIR by inhibiting chemotaxis of neutrophils through p300-mediated downregulation of IL-8, providing clinical insight for LTIR injury.
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Affiliation(s)
- Li Wei
- Department of Thoracic Surgery, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University and People's Hospital of Henan University, Zhengzhou 450003, P.R. China
| | - Jiwei Li
- Department of Thoracic Surgery, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University and People's Hospital of Henan University, Zhengzhou 450003, P.R. China.
| | - Zhijun Han
- Department of Thoracic Surgery, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University and People's Hospital of Henan University, Zhengzhou 450003, P.R. China
| | - Zhong Chen
- Department of Thoracic Surgery, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University and People's Hospital of Henan University, Zhengzhou 450003, P.R. China
| | - Quan Zhang
- Department of Thoracic Surgery, Henan Provincial People's Hospital, People's Hospital of Zhengzhou University and People's Hospital of Henan University, Zhengzhou 450003, P.R. China
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21
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Jia P, Wu N, Jia D, Sun Y. Downregulation of MALAT1 alleviates saturated fatty acid-induced myocardial inflammatory injury via the miR-26a/HMGB1/TLR4/NF-κB axis. Diabetes Metab Syndr Obes 2019; 12:655-665. [PMID: 31123414 PMCID: PMC6511247 DOI: 10.2147/dmso.s203151] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 03/04/2019] [Indexed: 12/12/2022] Open
Abstract
Purpose: The increased level of saturated fatty acids (SFAs) is found in patients with diabetes, obesity, and other metabolic disorders. SFAs can induce lipotoxic damage to cardiomyocytes, but the mechanism is unclear. The long noncoding RNA metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) acts as a key regulator in palmitic acid (PA)-induced hepatic steatosis, but its role in PA-induced myocardial lipotoxic injury is still unknown. The aim of this study was to explore the role and underlying mechanism of MALAT1 in PA-induced myocardial lipotoxic injury. Methods: MALAT1 expression in PA-treated human cardiomyocytes (AC16 cells) was detected by RT-qPCR. The effect of MALAT1 on PA-induced myocardial injury was measured by Cell Counting Kit-8, lactate dehydrogenase (LDH), and creatine kinase-MB (CK-MB) assays. Apoptosis was detected by flow cytometry. The activities of cytokines and nuclear factor (NF)-κB were detected by enzyme-linked immunosorbent assay. The interaction between MALAT1 and miR-26a was evaluated by a luciferase reporter assay and RT-qPCR. The regulatory effects of MALAT1 on high mobility group box 1 (HMGB1) expression were evaluated by RT-qPCR and western blotting. Results: MALAT1 was significantly upregulated in cardiomyocytes after PA treatment. Knockdown of MALAT1 increased the viability of PA-treated cardiomyocytes, decreased apoptosis, and reduced the levels of LDH, CK-MB, TNF-α, and IL-1β. Moreover, we found that MALAT1 specifically binds to miR-26a and observed a reciprocal negative regulatory relationship between these factors. We further found that the downregulation of MALAT1 represses HMGB1 expression, thereby inhibiting the activation of the Toll-like receptor 4 (TLR4)/NF-κB-mediated inflammatory response. These repressive effects were rescued by an miR-26a inhibitor. Conclusion: We demonstrate that MALAT1 is induced by SFAs and its downregulation alleviates SFA-induced myocardial inflammatory injury via the miR-26a/HMGB1/TLR4/NF-κB axis. Our findings provide new insight into the mechanism underlying myocardial lipotoxic injury.
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Affiliation(s)
- Pengyu Jia
- Department of Cardiology, the First Affiliated Hospital of China Medical University, Shenyang, Liaoning, People‘s Republic of China
| | - Nan Wu
- The Central Laboratory of the First Affiliated Hospital of China Medical University, Shenyang, Liaoning, People‘s Republic of China
| | - Dalin Jia
- Department of Cardiology, the First Affiliated Hospital of China Medical University, Shenyang, Liaoning, People‘s Republic of China
| | - Yingxian Sun
- Department of Cardiology, the First Affiliated Hospital of China Medical University, Shenyang, Liaoning, People‘s Republic of China
- Correspondence: Yingxian Sun; Dalin JiaDepartment of Cardiology, The First Affiliated Hospital of China Medical University, 155th North of Nanjing Street, Heping District, Shenyang 110001, Liaoning, People’s Republic of ChinaTel +86 248 328 2602; Tel +86 248 328 2602Fax +860 248 328 2602; +860 248 328 2688Email ;
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22
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Wang C, Zhang Q, Hu Y, Zhu J, Yang J. Emerging role of long non-coding RNA MALAT1 in predicting clinical outcomes of patients with digestive system malignancies: A meta-analysis. Oncol Lett 2018; 17:2159-2170. [PMID: 30719108 PMCID: PMC6350192 DOI: 10.3892/ol.2018.9875] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2018] [Accepted: 11/28/2018] [Indexed: 12/16/2022] Open
Abstract
Digestive system malignancies are the most common cancer types worldwide and exhibit an extremely low overall 5-year survival rate. Therefore, clinically applicable biomarkers for predicting clinical outcome are urgently required. Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) is abnormally expressed in several cancer types. However, to the best of our knowledge, the association between MALAT1 expression and the prognosis of digestive system malignancies remains unknown. Therefore, the current study performed a meta-analysis to comprehensively summarize the association between MALAT1 expression and digestive system malignancies. A total of 1,157 Asian patients from 12 eligible studies [eight studies that investigated overall survival (OS), two studies that investigated disease-free survival and two studies that investigated both indicators] were analyzed. The present results identified a significant association between MALAT1 abundance and poor OS in patients with digestive system malignancies, with a pooled hazard ratio (HR) of 1.62 [95% confidence interval (CI), 1.35–1.88; P<0.001]. The tumor type, region, sample size and analysis type did not alter the predictive value of MALAT1 as an independent factor for survival. Furthermore, MALAT1 overexpression was an unfavorable prognostic factor for the overall survival of patients with esophageal carcinoma, pancreatic cancer, hepatocellular carcinoma and gastric cancer, with HRs of 1.89 (95% CI, 1.29–2.49), 1.76 (95% CI, 0.89–2.63), 1.46 (95% CI, 0.76–2.17) and 1.41 (95% CI, 1.04–1.78), respectively. In particular, increased MALAT1 expression levels were significantly associated with decreased OS in patients with colorectal cancer (HR, 3.04; 95% CI, 1.77–4.31). In conclusion, lncRNA MALAT1 may be a potential prognostic factor for digestive system malignancies in Asian populations.
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Affiliation(s)
- Chao Wang
- Key Lab of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
| | - Qiaoling Zhang
- Department of Clinical Medicine and Rehabilitation, Jiangsu College of Nursing, Huai'an, Jiangsu 223005, P.R. China
| | - Yuhuan Hu
- Key Lab of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
| | - Jianshen Zhu
- Key Lab of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China
| | - Jinyou Yang
- Key Lab of Modern Toxicology of Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing, Jiangsu 211166, P.R. China.,Department of Clinical Medicine and Rehabilitation, Jiangsu College of Nursing, Huai'an, Jiangsu 223005, P.R. China
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23
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Yang Z, Xie Q, Chen Z, Ni H, Xia L, Zhao Q, Chen Z, Chen P. Resveratrol suppresses the invasion and migration of human gastric cancer cells via inhibition of MALAT1-mediated epithelial-to-mesenchymal transition. Exp Ther Med 2018; 17:1569-1578. [PMID: 30783423 PMCID: PMC6364244 DOI: 10.3892/etm.2018.7142] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2018] [Accepted: 11/22/2018] [Indexed: 12/18/2022] Open
Abstract
Resveratrol, a natural polyphenolic phytoalexin, was reported to exert multiple anticancer effects as a traditional Chinese medicine. However, research regarding the anticancer mechanism of resveratrol for the treatment and prevention of gastric cancer has reported conflicting results. In the present study, it was determined that resveratrol inhibited cell viability in a dose-dependent manner in the human gastric cancer cell line BGC823. Cell migration and invasion were suppressed significantly following treatment with 200 µM resveratrol. Additionally, resveratrol inhibited metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) expression, which was overexpressed in gastric cancer cells. Further experiments revealed that MALAT1 knockdown suppressed cell viability, migration, invasion and epithelial-to-mesenchymal transition in BGC823 cells. The present study indicated that resveratrol inhibited migration and invasion in human gastric cancer cells via suppressing MALAT1-mediated epithelial-to-mesenchymal transition, providing novel evidence for understanding the anticancer mechanism of resveratrol.
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Affiliation(s)
- Zhuying Yang
- Department of Medical Oncology, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310006, P.R. China.,Department of Gastroenterology, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310012, P.R. China
| | - Qigui Xie
- Department of Gastroenterology, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310012, P.R. China
| | - Zhanlei Chen
- Department of Gastroenterology, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310012, P.R. China
| | - Haibin Ni
- Department of Gastrointestinal Pancreatic Surgery, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310012, P.R. China
| | - Liang Xia
- Department of Gastroenterology, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310012, P.R. China
| | - Qiufeng Zhao
- Department of Gastroenterology, Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310012, P.R. China
| | - Zhiyun Chen
- The Second Central Laboratory, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310006, P.R. China
| | - Peifeng Chen
- Department of Medical Oncology, The First Affiliated Hospital of Zhejiang Chinese Medical University, Hangzhou, Zhejiang 310006, P.R. China
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24
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Wang Q, Lu G, Chen Z. MALAT1 promoted cell proliferation and migration via MALAT1/miR-155/MEF2A pathway in hypoxia of cardiac stem cells. J Cell Biochem 2018; 120:6384-6394. [PMID: 30362213 DOI: 10.1002/jcb.27925] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2018] [Accepted: 09/27/2018] [Indexed: 01/21/2023]
Abstract
Accumulating evidence revealed that hypoxia contributed to many human diseases, including ischemic myocardium and heart failure (HF). In recent years, the roles of hypoxia in stem cell survival and cardiac biology have been studied extensively. However, the underlying molecular mechanisms remain to be elucidated. As a leading cause of HF, ischemic heart disease was correlated with hypoxia. In this study, we firstly constructed the hypoxia cell model by CoCl2 in cardiac stem cells (CSCs) and found that hypoxia induced the cell proliferation and migration potential in CSCs. Then, we demonstrated that the expression of metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) was promoted in CoCl2 -induced CSCs hypoxia model. Furthermore, we found that knockdown of MALAT1 inhibited the cell proliferation and migration in CoCl2 -induced CSCs hypoxia model. In addition, we revealed that MALAT1 regulated the microRNA-155 (miR-155) expression in CSCs under both the normal and hypoxia conditions and further, manipulation of the miR-155 expression affected the role of MALAT1 in CoCl2 -induced CSCs hypoxia cell model. We then illustrated that miR-155 regulated the myocyte enhancer factor 2A (MEF2A) expression in CSCs under both the normal and hypoxia conditions and further, changing the expression of MEF2A affected the role of miR-155. Finally, we demonstrated that MALAT1 regulated the MEF2A expression and exerted its role via modulation of the MALAT1/miR-155/MEF2A pathway. Taken together, our study illustrated that MALAT1 promoted the cell proliferation and migration in CoCl2 -induced CSCs hypoxia model, acting mechanistically by promoting MEF2A expression via "sponging" miR-155.
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Affiliation(s)
- Qiuyun Wang
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Guoping Lu
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Zhenyue Chen
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, China
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25
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Zhu P, Yang M, Ren H, Shen G, Chen J, Zhang J, Liu J, Sun C. Long noncoding RNA MALAT1 downregulates cardiac transient outward potassium current by regulating miR-200c/HMGB1 pathway. J Cell Biochem 2018; 119:10239-10249. [PMID: 30145795 DOI: 10.1002/jcb.27366] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2017] [Accepted: 06/25/2018] [Indexed: 12/13/2022]
Abstract
The dysregulation of long noncoding RNAs (lncRNAs) and microRNAs (miRNAs) participates in the remodeling of electrophysiological/ion channel in cardiomyocytes during arrhythmia. The lncRNA metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) is reported to be highly expressed in myocardial ischemia-reperfusion injury and offsets cardioprotective effects of fentanyl. However, the roles of MALAT1 and its related miRNAs during arrhythmia are poorly understood. In this study, the overexpression of MALAT1 was firstly indicated in cardiomyocytes from arrhythmic model rats. After downregulation of MALAT1 by RNA interference, transient outward potassium current (Ito), peak current density, and the levels of Kv4.2 and Kv4.3 channel proteins were increased in rat cardiomyocytes. Then, miR-200c was predicted and convinced to be a direct target of MALAT1, and high-mobility group box 1 (HMGB1) was verified to be a target of miR-200c during arrhythmia. HMGB1 expression reduced by the knockdown of MALAT1 was further decreased by miR-200c overexpression. In addition, cardiac Ito, peak current density, and the levels of Kv4.2 and Kv4.3 in arrhythmic model rats were detected to be negatively correlated with the expression of HMGB1, and to be positively with miR-200c expression. Taken together, these results suggested that MALAT1 may act as a competing endogenous RNA for miR-200c to upregulate the expression of HMGB1 and downregulate cardiac Ito.
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Affiliation(s)
- Peng Zhu
- Department of Cardiovascular Medicine, The First Affiliated Hospital, Medical College of Xi'an Jiaotong University, Xi'an, China.,Department of Cardiovascular Medicine, The Fifth Affiliated Hospital of Zunyi Medical University, Zhuhai, China
| | - Manli Yang
- Department of Respiratory Medicine, The Fifth Affiliated Hospital of Zunyi Medical University, Zhuhai, China
| | - Hui Ren
- Department of Cardiovascular Medicine, Ankang Central Hospital, Ankang, China
| | - Guidong Shen
- Department of Cardiovascular Medicine, Ankang Central Hospital, Ankang, China
| | - Jinye Chen
- Department of Cardiovascular Medicine, Ankang Central Hospital, Ankang, China
| | - Junkang Zhang
- Department of Cardiovascular Medicine, Ankang Central Hospital, Ankang, China
| | - Jun Liu
- Department of Pathology, Ankang Central Hospital, Ankang, China
| | - Chaofeng Sun
- Department of Cardiovascular Medicine, The First Affiliated Hospital, Medical College of Xi'an Jiaotong University, Xi'an, China
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26
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Cui Y, Li G, Zhang X, Dai F, Zhang R. Increased MALAT1 expression contributes to cisplatin resistance in non-small cell lung cancer. Oncol Lett 2018; 16:4821-4828. [PMID: 30250547 PMCID: PMC6144744 DOI: 10.3892/ol.2018.9293] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2017] [Accepted: 04/04/2018] [Indexed: 12/17/2022] Open
Abstract
Cisplatin-based chemotherapy is commonly used for the clinical treatment of patients with non-small cell lung cancer (NSCLC). However, the anti-tumor efficacy of cisplatin is limited by poor clinical response and the development of chemoresistance. At present, the underlying mechanism for cisplatin resistance remains unclear. In the present study, it was identified that metastasis-associated lung adenocarcinoma transcript 1 (MALAT1), a long non-coding RNA that has been demonstrated to function as an oncogene, was increased in tumor tissues from patients with cisplatin-resistant NSCLC. In addition, the MALAT1 level was increased in A549rCDDP cells compared with the parental A549 cells. Silencing of MALAT1 sensitized A549rCDDP cells to cisplatin treatment, while overexpression of MALAT1 in A549 cells decreased their sensitivity towards cisplatin. Through analysis of the gene expression in patient samples, a decrease in miR-145 and an increase in Kruppel-like factor 4 (KLF4) in tumor tissues compared with adjacent normal tissues was observed. A negative association between MALAT1 and miR-145 was also identified in A549 cells and A549rCDDP cells. Furthermore, reverse transcription quantitative polymerase chain reaction and western blotting identified that KLF4 was positively and negatively regulated by MALAT1 and miR-145, respectively. The direct regulatory association between MALAT1 and miR-145 and the target gene KLF4 was additionally confirmed using a luciferase reporter assay. Knockdown of MALAT1 reversed cisplatin resistance in A549rCDDP cells. Taken together, these data indicated that MALAT1 decreased the sensitivity of NSCLC to cisplatin via the regulation of miR-145 and KLF4.
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Affiliation(s)
- Yong Cui
- The Third Department of Oncology, Shouguang People's Hospital, Shouguang, Shandong 262700, P.R. China
| | - Guanlong Li
- The Third Department of Oncology, Shouguang People's Hospital, Shouguang, Shandong 262700, P.R. China
| | - Xin Zhang
- The Third Department of Oncology, Shouguang People's Hospital, Shouguang, Shandong 262700, P.R. China
| | - Fangfang Dai
- The Third Department of Oncology, Shouguang People's Hospital, Shouguang, Shandong 262700, P.R. China
| | - Rongxiang Zhang
- The Third Department of Oncology, Shouguang People's Hospital, Shouguang, Shandong 262700, P.R. China
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27
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Zhao M, Wang S, Li Q, Ji Q, Guo P, Liu X. MALAT1: A long non-coding RNA highly associated with human cancers. Oncol Lett 2018; 16:19-26. [PMID: 29928382 PMCID: PMC6006327 DOI: 10.3892/ol.2018.8613] [Citation(s) in RCA: 62] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2015] [Accepted: 03/21/2017] [Indexed: 12/18/2022] Open
Abstract
Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1), a well-known lncRNA associated with numerous diseases, particularly cancer, has received increased attention. The expression of MALAT1 was determined to be upregulated in numerous types of tumors and MALAT1 exhibited effects on tumor cell proliferation, migration, invasion and apoptosis. The abnormal expression of MALAT1 was identified in almost in every organ of the digestive system. MALAT1 performed an important role in the pathological alterations of organs that are associated with sex hormones and several reproductive system cancers. MALAT1 participates in molecular pathways. In the clinical application of MALAT1, MALAT1 was considered as a potential biomarker for the diagnosis and prediction of cancers, and may also serve as therapeutic target for treatment of specific tumors. This review summarizes the abnormal expression of MALAT1 in cancer, its significant effect on the primary features of cancer, as well as the underlying molecular mechanisms of MALAT1 in various cancers. According to studies on MALAT1, we introduce the upstream and downstream substances associated with the function of MALAT1. These reviewed studies promote the clinical application of MALAT1 in the aspect of diagnosis and treatment of different cancers, and may help point out new study directions for MALAT1.
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Affiliation(s)
- Miaomiao Zhao
- Department of Traditional Chinese Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China.,Department of Oncology, Zhengzhou Traditional Chinese Medicine Hospital, Zhengzhou 450007, P.R. China
| | - Songpo Wang
- Department of Traditional Chinese Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| | - Qi Li
- Department of Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P.R. China
| | - Qing Ji
- Department of Oncology, Shuguang Hospital, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, P.R. China
| | - Piaoting Guo
- Department of Traditional Chinese Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
| | - Xiaowei Liu
- Department of Traditional Chinese Medicine, Shanghai General Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai 200080, P.R. China
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28
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Lin L, Li H, Zhu Y, He S, Ge H. Expression of metastasis-associated lung adenocarcinoma transcript 1 long non-coding RNA in vitro and in patients with non-small cell lung cancer. Oncol Lett 2018; 15:9443-9449. [PMID: 29805668 DOI: 10.3892/ol.2018.8531] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2017] [Accepted: 01/16/2018] [Indexed: 12/23/2022] Open
Abstract
The present study aimed to investigate the association between the expression of metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) long non-coding RNA (lncRNA) and the recurrence of non-small cell lung cancer (NSCLC) and to elucidate the potential mechanisms of MALAT1 in vitro. Between 1 June 1, 2010 and December 30, 2016, NSCLC tumor tissues and adjacent non-cancerous tissues were obtained from 120 patients with NSCLC, who had undergone surgical resection at Taizhou Hospital of Wenzhou Medical University (Linhai, China). The total RNA of tissues and cells were extracted and the expression of MALAT1 was determined using a wound healing assay and reverse transcription quantitative polymerase chain reaction. In addition, MALAT1 expression in A549 cells was silenced using small interfering RNA. The proliferation, migration and invasion of cells were then assessed using a CellTiter 96 kit and Transwell assays. MALAT1 expression was significantly increased in NSCLC samples compared with expression in adjacent non-cancerous tissues. Furthermore, the expression of MALAT1 in patients with NSCLC that exhibited recurrence was markedly higher than in those that did not. The results of the present study also demonstrated significant associations between high expression of MALAT1 and female sex, Tumor-Node-Metastasis advanced stage, vessel invasion, pathological differentiation and recurrence of patients with NSCLC. The proliferative, migratory and invasive abilities of MALAT1-silenced A549 cells were significantly decreased compared with those of control cells. MALAT1 expression was significantly increased in NSCLC tissues and was revealed to serve a role in the progression of NSCLC.
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Affiliation(s)
- Ling Lin
- Department of Respiratory Medicine, Taizhou Hospital of Wenzhou Medical University, Linhai, Zhejiang 317000, P.R. China
| | - Haiyan Li
- Department of Respiratory Medicine, Taizhou Hospital of Wenzhou Medical University, Linhai, Zhejiang 317000, P.R. China
| | - Yefei Zhu
- Department of Respiratory Medicine, Taizhou Hospital of Wenzhou Medical University, Linhai, Zhejiang 317000, P.R. China
| | - Susu He
- Department of Respiratory Medicine, Taizhou Hospital of Wenzhou Medical University, Linhai, Zhejiang 317000, P.R. China
| | - Hongfei Ge
- Department of Cardiothoracic Surgery, Taizhou Hospital of Wenzhou Medical University, Linhai, Zhejiang 317000, P.R. China
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Abstract
Overexpression of Axl has been noted to correlate with several human cancers. However, the regulatory mechanisms and effects of Axl in human neuroblastoma development remain unclear. Here, we explore the expression of Axl in neurobalstoma and related upstream regulatory mechanisms of invasion and migration. We found that Axl was overexpressed in metastatic neuroblastoma tissues and positively associated with long non-coding RNA metastasis-associated lung adenocarcinoma transcript 1. Meanwhile, our data suggested that metastasis-associated lung adenocarcinoma transcript 1 upregulated Axl expression in neuroblastoma cells, resulting in cell invasion and migration. Furthermore, we found that targeting Axl by inhibitor R428 significantly suppressed the abilities of tumor cell invasion and migration. In summary, these results suggested that Axl, which is regulated by long non-coding RNA metastasis-associated lung adenocarcinoma transcript 1, may exert great influence on invasion and migration of neuroblastoma.
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Affiliation(s)
- Shaojie Bi
- 1 Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
| | - Chunyan Wang
- 2 Department of Emergency Medicine, The Second Hospital of Shandong University, Jinan, China
| | - Yixin Li
- 3 Department of Medical Imaging, The Second Hospital of Shandong University, Jinan, China
| | - Wei Zhang
- 1 Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
| | - Juan Zhang
- 1 Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
| | - Zhaopeng Lv
- 1 Department of Cardiology, The Second Hospital of Shandong University, Jinan, China
| | - Junxia Wang
- 4 Department of Clinical Laboratory, The Second Hospital of Shandong University, Jinan, China
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Xin JW, Jiang YG. Long noncoding RNA MALAT1 inhibits apoptosis induced by oxygen-glucose deprivation and reoxygenation in human brain microvascular endothelial cells. Exp Ther Med 2017; 13:1225-1234. [PMID: 28413461 PMCID: PMC5377418 DOI: 10.3892/etm.2017.4095] [Citation(s) in RCA: 44] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Accepted: 07/07/2016] [Indexed: 12/15/2022] Open
Abstract
Cerebral ischemia/reperfusion (I/R) injury leads to brain vascular dysfunction, which is characterized by endothelial cell injury or death. Long noncoding (lnc) RNA metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) is reportedly associated with endothelial cell functions and dysfunctions. In the present study, the role of MALAT1 in I/R-induced cerebral vascular endothelial cell apoptosis was explored using oxygen-glucose deprivation and reoxygenation (OGD-R) as an in vitro I/R injury model. Primary human brain microvascular endothelial cells were cultured under OGD-R, and the expression levels of MALAT1 and cell apoptosis were measured at 6, 9, 12, 24 and 36 h post-reoxygenation. The expression levels of MALAT1 and the apoptotic rate of cells exposed to OGD-R exhibited contrasting trends following reoxygenation. Following OGD-R, lentiviral overexpression of MALAT1 increased phosphatidylinositol 3-kinase (PI3K) activities and the activation of Akt phosphorylation, and decreased cell apoptosis and caspase 3 activities, which were successfully abolished by treatment with a PI3K inhibitor, Wortmannin. Conversely, lentiviral knockdown of MALAT1 decreased PI3K activities and the activation of Akt phosphorylation, and increased cell apoptosis and caspase 3 activity. Overexpression and knockdown of MALAT1 exhibited no significant effects on OGD-R-induced reactive oxygen species (ROS) production. In conclusion, to the best of our knowledge, the present study was the first to suggest that lncRNA MALAT1 may protect human brain vascular endothelial cells from OGD-R-induced apoptosis via a PI3K-dependent mechanism. These findings suggest that MALAT1 may be a potential novel therapeutic target for cerebral I/R injury.
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Affiliation(s)
- Jia-Wei Xin
- Department of Neurosurgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, P.R. China
| | - Yu-Gang Jiang
- Department of Neurosurgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, P.R. China
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31
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Liu S, Jiang X, Li W, Cao D, Shen K, Yang J. Inhibition of the long non-coding RNA MALAT1 suppresses tumorigenicity and induces apoptosis in the human ovarian cancer SKOV3 cell line. Oncol Lett 2016; 11:3686-3692. [PMID: 27313681 PMCID: PMC4888020 DOI: 10.3892/ol.2016.4435] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2015] [Accepted: 03/18/2016] [Indexed: 12/26/2022] Open
Abstract
Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) is a 8,000 nucleotide-long, spliced non-coding RNA, which has been reported to be deregulated in several tumors. However, to the best of our knowledge, the role of MALAT1 in ovarian cancer has not been previously investigated. The aim of the present study was to investigate the effect of MALAT1 inhibition on the tumorigenity of SKOV3 cells. First, stable MALAT1-knockdown ovarian cancer cells and control cells were established using lentivirus-mediated artificial micro RNA interference in order to investigate the effect of MALAT1 inhibition on cell viability, clonability, migration, invasion and apoptosis in vitro. In addition, the effect of MALAT1 on cell growth in nude mice was assessed. To identify the possible targets of MALAT1, total RNA was extracted from MALAT1-knockdown cells and control cells and a microarray analysis was performed. The results showed that MALAT1 inhibition significantly suppressed tumorigenity in vitro and in vivo (P<0.01). Compared with the control cells, 921 genes in the MALAT1-knockdown cells were deregulated by at least two-fold. The results of the reverse transcription-quantitative polymerase chain reaction showed that 19 of the 20 genes selected for validation confirmed the deregulation indicated by the microarray analysis. The findings define a major oncogenic role for MALAT1, which may offer an attractive novel target for therapeutic intervention in ovarian cancer.
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Affiliation(s)
- Shiping Liu
- Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, P.R China
| | - Xuan Jiang
- Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, P.R China
| | - Weihua Li
- Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, P.R China
| | - Dongyan Cao
- Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, P.R China
| | - Keng Shen
- Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, P.R China
| | - Jiaxin Yang
- Department of Obstetrics and Gynecology, Peking Union Medical College Hospital, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing 100730, P.R China
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Konishi H, Ichikawa D, Yamamoto Y, Arita T, Shoda K, Hiramoto H, Hamada J, Itoh H, Fujita Y, Komatsu S, Shiozaki A, Ikoma H, Ochiai T, Otsuji E. Plasma level of metastasis-associated lung adenocarcinoma transcript 1 is associated with liver damage and predicts development of hepatocellular carcinoma. Cancer Sci 2016; 107:149-54. [PMID: 26614531 PMCID: PMC4768388 DOI: 10.1111/cas.12854] [Citation(s) in RCA: 73] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2015] [Revised: 11/16/2015] [Accepted: 11/20/2015] [Indexed: 12/26/2022] Open
Abstract
Recent studies have shown that metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) was overexpressed in many human solid cancers, however, its roles in plasma of hepatocellular carcinoma (HCC) patients were unclear. The aim of this study was to investigate the significance of plasma MALAT1 levels in HCC patients. Plasma samples were collected from pre-operative HCC, hepatic disease patients, and healthy controls, and tissue samples from HCC patients and colorectal cancer patients with liver metastasis. Plasma and tissue MALAT1 levels were measured. Plasma MALAT1 levels were progressively and significantly higher in HCC patients than hepatic disease patients, and higher in hepatic disease patients than healthy controls. The expression of MALAT1 in HCC tissue was slightly higher than that in paired non-cancerous liver tissue, but not significant. The expression of MALAT1 in the non-cancerous liver tissue of 20 HCC patients was significantly higher than that in normal liver tissue of 13 colorectal cancer patients. In contrast, plasma MALAT1 levels were significantly low in HCC patients with hepatitis B infection, and significantly high in patients with liver damage B or liver cirrhosis. In a receiver-operator curve analysis of HCC and hepatic disease patients, the cut-off value of plasma MALAT1 was 1.60 and the area under the curve was 0.66. Plasma MALAT1 levels were not correlated with α-fetoprotein or protein induced by vitamin K absence II, whereas sensitivity and specificity for the detection of HCC with the combination of MALAT1, α-fetoprotein, and protein induced by vitamin K absence II were 88.6% and 75%, respectively. In conclusion, the plasma MALAT1 level is associated with liver damage, and has clinical utility for predicting development of HCC.
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Affiliation(s)
- Hirotaka Konishi
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Daisuke Ichikawa
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yusuke Yamamoto
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Tomohiro Arita
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Katsutoshi Shoda
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hidekazu Hiramoto
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Junichi Hamada
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hiroshi Itoh
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Yuji Fujita
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Shuhei Komatsu
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Atsushi Shiozaki
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Hisashi Ikoma
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Toshiya Ochiai
- Department of Surgery, North Medical Center, Kyoto Prefectural University of Medicine, Kyoto, Japan
| | - Eigo Otsuji
- Division of Digestive Surgery, Department of Surgery, Kyoto Prefectural University of Medicine, Kyoto, Japan
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Yan J, Zhou X, Dang Y, Yin C, Zhang G. Prognostic role of the long non-coding RNA metastasis-associated lung adenocarcinoma transcript 1 in various cancers: A meta-analysis. Mol Clin Oncol 2015; 4:100-106. [PMID: 26870366 DOI: 10.3892/mco.2015.657] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2015] [Accepted: 09/18/2015] [Indexed: 01/06/2023] Open
Abstract
Several studies have investigated the correlation between the expression of metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) and cancer prognosis, with inconsistent results. Therefore, a meta-analysis was conducted to identify the potential correlation after pooling data from eligible studies. PubMed/Medline, Web of Science and The Cochrane Library electronic databases were searched for eligible studies on the prognostic role of MALAT1 in cancer, from inception to January, 2015. Pooled hazard ratios (HRs) with 95% confidence intervals (CIs) were calculated to summarize the effect. A total of 1,198 patients from 10 studies were included in the analysis. The results suggested that MALAT1 expression was significantly associated with overall survival (HR=2.07, 95% CI: 1.67-2.56), disease-free survival (HR=2.60, 95% CI: 1.69-4.00) and recurrence-free survival (HR=3.28, 95% CI: 1.52-7.09). MALAT1 was also found to be significantly associated with tumor size (P=0.013). Overall, MALAT1 expression may be considered as a potential prognostic factor for cancer patients.
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Affiliation(s)
- Jin Yan
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China; The First School of Clinical Medicine of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Xiaoying Zhou
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China; The First School of Clinical Medicine of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Yini Dang
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China; The First School of Clinical Medicine of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Chengqiang Yin
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China; The First School of Clinical Medicine of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
| | - Guoxin Zhang
- Department of Gastroenterology, The First Affiliated Hospital of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China; The First School of Clinical Medicine of Nanjing Medical University, Nanjing, Jiangsu 210029, P.R. China
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Jiang Y, Li Y, Fang S, Jiang B, Qin C, Xie P, Zhou G, Li G. The role of MALAT1 correlates with HPV in cervical cancer. Oncol Lett 2014; 7:2135-2141. [PMID: 24932303 PMCID: PMC4049771 DOI: 10.3892/ol.2014.1996] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Accepted: 02/13/2014] [Indexed: 12/21/2022] Open
Abstract
Cervical cancer, the second most common type of cancer in women worldwide, is responsible for >275,100 mortalities each year and is associated with high-risk human papilloma virus (HR-HPV). HPVs have two important oncogenes, E6 and E7, which have crucial roles in malignant transformation in cervical cancer. Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1) is a long non-coding RNA originally identified in non-small cell lung cancer. Previous studies have revealed that MALAT1 is expressed in numerous tissue types, and is significant in maintaining the normal function of the body. However, it also appeared to be notably upregulated in numerous carcinoma types compared with adjacent non-cancerous tissues. In the present study, it was identified that MALAT1 expression was upregulated in cervical cancer cell lines compared with normal cervical squamous cell samples. Further study into the effect of MALAT1 on cellular phenotype revealed that MALAT1 was able to promote cell migration and proliferation. Of note, it was revealed that the expression of MALAT1 was decreased with the knockdown of HPV16 E6/E7 in CaSki cells. Furthermore, the investigations in clinical samples also revealed that MALAT1 was expressed in HPV-positive cervical squamous cells, but not in HPV-negative normal cervical squamous cells. These results indicate that HPV correlates with MALAT1 deregulation in cervical cancer.
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Affiliation(s)
- Yan Jiang
- Cancer Research Institution, Xiangya Medical School, Central South University, Changsha, Hunan 410078, P.R. China
| | - Yuehui Li
- Cancer Research Institution, Xiangya Medical School, Central South University, Changsha, Hunan 410078, P.R. China
| | - Shujuan Fang
- Cancer Research Institution, Xiangya Medical School, Central South University, Changsha, Hunan 410078, P.R. China
| | - Binyuan Jiang
- Cancer Research Institution, Xiangya Medical School, Central South University, Changsha, Hunan 410078, P.R. China
| | - Changfei Qin
- Cancer Research Institution, Xiangya Medical School, Central South University, Changsha, Hunan 410078, P.R. China
| | - Pingli Xie
- Cancer Research Institution, Xiangya Medical School, Central South University, Changsha, Hunan 410078, P.R. China
| | - Guohua Zhou
- Cancer Research Institution, Xiangya Medical School, Central South University, Changsha, Hunan 410078, P.R. China
| | - Guancheng Li
- Cancer Research Institution, Xiangya Medical School, Central South University, Changsha, Hunan 410078, P.R. China
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He Y, Meng XM, Huang C, Wu BM, Zhang L, Lv XW, Li J. Long noncoding RNAs: Novel insights into hepatocelluar carcinoma. Cancer Lett 2013; 344:20-27. [PMID: 24183851 DOI: 10.1016/j.canlet.2013.10.021] [Citation(s) in RCA: 320] [Impact Index Per Article: 29.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Revised: 10/18/2013] [Accepted: 10/23/2013] [Indexed: 02/07/2023]
Abstract
Recent advances in non-protein coding part of human genome analysis have discovered extensive transcription of large RNA transcripts that lack of coding protein function, termed long noncoding RNAs (lncRNAs). It is becoming evident that lncRNAs may be an important class of pervasive genes involved in carcinogenesis and metastasis. However, the biological and molecular mechanisms of lncRNAs in diverse diseases are not yet fully understood. Thus, it is anticipated that more efforts should be made to clarify the lncRNAs world. Moreover, accumulating studies have demonstrated that a class of lncRNAs are dysregulated in hepatocellular carcinoma(HCC) and closely related with tumorigenesis, metastasis, prognosis or diagnosis. In this review, we will briefly discuss the regulation and functional role of lncRNAs in HCC, therefore evaluating the potential of lncRNAs as prospective novel therapeutic targets in HCC.
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Affiliation(s)
- Yong He
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei 230032, China; The Key Laboratory of Anti-Inflammatory and Immune Medicine (Anhui Medical University), Ministry of Education, China; Institute for Liver Diseases of Anhui Medical University (ILD-AMU), Anhui Medical University, Hefei 230032, China
| | - Xiao-Ming Meng
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei 230032, China; The Key Laboratory of Anti-Inflammatory and Immune Medicine (Anhui Medical University), Ministry of Education, China; Institute for Liver Diseases of Anhui Medical University (ILD-AMU), Anhui Medical University, Hefei 230032, China
| | - Cheng Huang
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei 230032, China; The Key Laboratory of Anti-Inflammatory and Immune Medicine (Anhui Medical University), Ministry of Education, China; Institute for Liver Diseases of Anhui Medical University (ILD-AMU), Anhui Medical University, Hefei 230032, China
| | - Bao-Ming Wu
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei 230032, China; The Key Laboratory of Anti-Inflammatory and Immune Medicine (Anhui Medical University), Ministry of Education, China; Institute for Liver Diseases of Anhui Medical University (ILD-AMU), Anhui Medical University, Hefei 230032, China
| | - Lei Zhang
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei 230032, China; The Key Laboratory of Anti-Inflammatory and Immune Medicine (Anhui Medical University), Ministry of Education, China; Institute for Liver Diseases of Anhui Medical University (ILD-AMU), Anhui Medical University, Hefei 230032, China
| | - Xiong-Wen Lv
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei 230032, China; The Key Laboratory of Anti-Inflammatory and Immune Medicine (Anhui Medical University), Ministry of Education, China; Institute for Liver Diseases of Anhui Medical University (ILD-AMU), Anhui Medical University, Hefei 230032, China
| | - Jun Li
- School of Pharmacy, Anhui Key Laboratory of Bioactivity of Natural Products, Anhui Medical University, Hefei 230032, China; The Key Laboratory of Anti-Inflammatory and Immune Medicine (Anhui Medical University), Ministry of Education, China; Institute for Liver Diseases of Anhui Medical University (ILD-AMU), Anhui Medical University, Hefei 230032, China.
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Wu P, Zuo X, Deng H, Liu X, Liu L, Ji A. Roles of long noncoding RNAs in brain development, functional diversification and neurodegenerative diseases. Brain Res Bull 2013; 97:69-80. [PMID: 23756188 DOI: 10.1016/j.brainresbull.2013.06.001] [Citation(s) in RCA: 275] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 05/31/2013] [Accepted: 06/01/2013] [Indexed: 12/11/2022]
Abstract
Long noncoding RNAs (lncRNAs) have been attracting immense research interest, while only a handful of lncRNAs have been characterized thoroughly. Their involvement in the fundamental cellular processes including regulate gene expression at epigenetics, transcription, and post-transcription highlighted a central role in cell homeostasis. However, lncRNAs studies are still at a relatively early stage, their definition, conservation, functions, and action mechanisms remain fairly complicated. Here, we give a systematic and comprehensive summary of the existing knowledge of lncRNAs in order to provide a better understanding of this new studying field. lncRNAs play important roles in brain development, neuron function and maintenance, and neurodegenerative diseases are becoming increasingly evident. In this review, we also highlighted recent studies related lncRNAs in central nervous system (CNS) development and neurodegenerative diseases, including Alzheimer's disease (AD), Parkinson's disease (PD), Huntington's disease (HD) and amyotrophic lateral sclerosis (ALS), and elucidated some specific lncRNAs which may be important for understanding the pathophysiology of neurodegenerative diseases, also have the potential as therapeutic targets.
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Affiliation(s)
- Ping Wu
- Center for Drug Research and Development, Zhujiang Hospital, Southern Medical University, Guangzhou 510282, PR China
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