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Lv M, Xu P, Wu Y, Huang L, Li W, Lv S, Wu X, Zeng X, Shen R, Jia X, Yin Y, Gu Y, Yuan H, Xie H, Fu Z. LncRNAs as new biomarkers to differentiate triple negative breast cancer from non-triple negative breast cancer. Oncotarget 2016; 7:13047-59. [PMID: 26910840 PMCID: PMC4914340 DOI: 10.18632/oncotarget.7509] [Citation(s) in RCA: 70] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2015] [Accepted: 01/19/2016] [Indexed: 12/20/2022] Open
Abstract
Triple negative breast cancer (TNBC) is an aggressive type of breast cancer with high heterogeneity. To date, there is no efficient therapy for TNBC patients and the prognosis is poor. It is urgent to find new biomarkers for the diagnosis of TNBC or efficient therapy targets. As an area of focus in the post-genome period, long non-coding RNAs (lncRNAs) have been found to play critical roles in many cancers, including TNBC. However, there is little information on differentially expressed lncRNAs between TNBC and non-TNBC. We detected the expression levels of lncRNAs in TNBC and non-TNBC tissues separately. Then we analyzed the lncRNA expression signature of TNBC relative to non-TNBC, and found dysregulated lncRNAs participated in important biological processes though Gene Ontology and Pathway analysis. Finally, we validated these lncRNA expression levels in breast cancer tissues and cells, and then confirmed that 4 lncRNAs (RP11-434D9.1, LINC00052, BC016831, and IGKV) were correlated with TNBC occurrence through receiver operating characteristic curve analysis. This study offers helpful information to understand the initiation and development mechanisms of TNBC comprehensively and suggests potential biomarkers for diagnosis or therapy targets for clinical treatment.
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Affiliation(s)
- Mingming Lv
- Nanjing Maternity and Child Health Medical Institute, Affiliated Nanjing Maternal and Child Health Hospital, Nanjing Medical University, Nanjing, China
| | - Pengfei Xu
- Nanjing Maternity and Child Health Medical Institute, Affiliated Nanjing Maternal and Child Health Hospital, Nanjing Medical University, Nanjing, China
| | - Ying Wu
- Nanjing Maternity and Child Health Medical Institute, Affiliated Nanjing Maternal and Child Health Hospital, Nanjing Medical University, Nanjing, China
| | - Lei Huang
- First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Wenqu Li
- First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Shanshan Lv
- Nanjing Maternity and Child Health Medical Institute, Affiliated Nanjing Maternal and Child Health Hospital, Nanjing Medical University, Nanjing, China
| | - Xiaowei Wu
- Department of Pharmacology, School of Basic Medical Sciences, Nanjing Medical University, Nanjing, China
| | - Xin Zeng
- Nanjing Maternity and Child Health Medical Institute, Affiliated Nanjing Maternal and Child Health Hospital, Nanjing Medical University, Nanjing, China
| | - Rong Shen
- Nanjing Maternity and Child Health Medical Institute, Affiliated Nanjing Maternal and Child Health Hospital, Nanjing Medical University, Nanjing, China
| | - Xuemei Jia
- Nanjing Maternity and Child Health Medical Institute, Affiliated Nanjing Maternal and Child Health Hospital, Nanjing Medical University, Nanjing, China
| | - Yongmei Yin
- First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Yun Gu
- Department of Pathology, Affiliated Nanjing Maternal and Child Health Hospital, Nanjing Medical University, Nanjing, China
| | - Hongyan Yuan
- Nanjing Maternity and Child Health Medical Institute, Affiliated Nanjing Maternal and Child Health Hospital, Nanjing Medical University, Nanjing, China
- Department of Oncology and Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington, D.C., USA
| | - Hui Xie
- Nanjing Maternity and Child Health Medical Institute, Affiliated Nanjing Maternal and Child Health Hospital, Nanjing Medical University, Nanjing, China
- First Affiliated Hospital, Nanjing Medical University, Nanjing, China
| | - Ziyi Fu
- Nanjing Maternity and Child Health Medical Institute, Affiliated Nanjing Maternal and Child Health Hospital, Nanjing Medical University, Nanjing, China
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Su S, Liu J, He K, Zhang M, Feng C, Peng F, Li B, Xia X. Overexpression of the long noncoding RNA TUG1 protects against cold-induced injury of mouse livers by inhibiting apoptosis and inflammation. FEBS J 2016; 283:1261-74. [PMID: 26785829 DOI: 10.1111/febs.13660] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 12/08/2015] [Accepted: 01/14/2016] [Indexed: 12/16/2022]
Abstract
UNLABELLED Hepatic injury provoked by cold storage is a major problem affecting liver transplantation, as exposure to cold induces apoptosis in hepatic tissues. Long noncoding RNAs (lncRNAs) are increasingly understood to regulate apoptosis, but the contribution of lncRNAs to cold-induced liver injury remains unknown. Using RNA-seq, we determined the differential lncRNA expression profile in mouse livers after cold storage and found that expression of the lncRNA TUG1 was significantly down-regulated. Overexpression of TUG1 attenuated cold-induced apoptosis in mouse hepatocytes and liver sinusoidal endothelial cells LSECs, in part by blocking mitochondrial apoptosis and endoplasmic reticulum (ER) stress pathways. Moreover, TUG1 attenuated apoptosis, inflammation, and oxidative stress in vivo in livers subjected to cold storage. Overexpression of TUG1 also improved hepatocyte function and prolonged hepatic graft survival rates in mice. These results suggest that the lncRNA TUG1 exerts a protective effect against cold-induced liver damage by inhibiting apoptosis in mice, and suggests a potential role for TUG1 as a target for the prevention of cold-induced liver damage in liver transplantation. DATABASES RNA-seq data are available from GEO using accession number GSE76609.
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Affiliation(s)
- Song Su
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Luzhou Medical College, Sichuan Province, China
| | - Jiang Liu
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Luzhou Medical College, Sichuan Province, China
| | - Kai He
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Luzhou Medical College, Sichuan Province, China
| | - Mengyu Zhang
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Luzhou Medical College, Sichuan Province, China
| | - Chunhong Feng
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Luzhou Medical College, Sichuan Province, China
| | - Fangyi Peng
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Luzhou Medical College, Sichuan Province, China
| | - Bo Li
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Luzhou Medical College, Sichuan Province, China
| | - Xianming Xia
- Department of Hepatobiliary Surgery, The Affiliated Hospital of Luzhou Medical College, Sichuan Province, China
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Sakurai T, Isogaya K, Sakai S, Morikawa M, Morishita Y, Ehata S, Miyazono K, Koinuma D. RNA-binding motif protein 47 inhibits Nrf2 activity to suppress tumor growth in lung adenocarcinoma. Oncogene 2016; 35:5000-9. [PMID: 26923328 PMCID: PMC5036161 DOI: 10.1038/onc.2016.35] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 12/22/2015] [Accepted: 01/11/2016] [Indexed: 01/27/2023]
Abstract
RNA-binding proteins provide a new layer of posttranscriptional regulation of RNA during cancer progression. We identified RNA-binding motif protein 47 (RBM47) as a target gene of transforming growth factor (TGF)-β in mammary gland epithelial cells (NMuMG cells) that have undergone the epithelial-to-mesenchymal transition. TGF-β repressed RBM47 expression in NMuMG cells and lung cancer cell lines. Expression of RBM47 correlated with good prognosis in patients with lung, breast and gastric cancer. RBM47 suppressed the expression of cell metabolism-related genes, which were the direct targets of nuclear factor erythroid 2-related factor 2 (Nrf2; also known as NFE2L2). RBM47 bound to KEAP1 and Cullin 3 mRNAs, and knockdown of RBM47 inhibited their protein expression, which led to enhanced binding of Nrf2 to target genomic regions. Knockdown of RBM47 also enhanced the expression of some Nrf2 activators, p21/CDKN1A and MafK induced by TGF-β. Both mitochondrial respiration rates and the side population cells in lung cancer cells increased in the absence of RBM47. Our findings, together with the enhanced tumor formation and metastasis of xenografted mice by knockdown of the RBM47 expression, suggested tumor-suppressive roles for RBM47 through the inhibition of Nrf2 activity.
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Affiliation(s)
- T Sakurai
- Department of Molecular Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - K Isogaya
- Department of Molecular Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - S Sakai
- Department of Molecular Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - M Morikawa
- Ludwig Institute for Cancer Research, Science for Life Laboratory, Uppsala University, Uppsala, Sweden
| | - Y Morishita
- Department of Molecular Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - S Ehata
- Department of Molecular Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - K Miyazono
- Department of Molecular Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
| | - D Koinuma
- Department of Molecular Pathology, Graduate School of Medicine, The University of Tokyo, Tokyo, Japan
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Wang J, Shao N, Ding X, Tan B, Song Q, Wang N, Jia Y, Ling H, Cheng Y. Crosstalk between transforming growth factor-β signaling pathway and long non-coding RNAs in cancer. Cancer Lett 2016; 370:296-301. [DOI: 10.1016/j.canlet.2015.11.007] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2015] [Revised: 10/11/2015] [Accepted: 11/04/2015] [Indexed: 12/12/2022]
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Jian L, Jian D, Chen Q, Zhang L. Long Noncoding RNAs in Atherosclerosis. J Atheroscler Thromb 2015; 23:376-84. [PMID: 26699715 DOI: 10.5551/jat.33167] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
Long noncoding RNAs (lncRNAs) were a group of non-protein-coding RNAs >200 nucleotides and participated in biological processes and pathophysiological conditions in vivo or in vitro. Recently, more and more lncRNAs interfering with the progress of atherosclerosis were identified and characterized in the atherogenic cells such as vascular smooth muscle cells (VSMCs), endothelial cells (ECs), and monocytes/macrophages showing that lncRNAs play an important role in the occurrence of atherosclerosis. In this review, we summarized and highlighted the lncRNAs that play a role in the process of atherosclerosis. This study may provide helpful insights regarding further study of lncRNAs associated with atherosclerosis.
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Affiliation(s)
- Liguo Jian
- Department of Cardiology, The Second Affiliated Hospital of Zhengzhou University
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EZH2 promotes progression of small cell lung cancer by suppressing the TGF-β-Smad-ASCL1 pathway. Cell Discov 2015; 1:15026. [PMID: 27462425 PMCID: PMC4860843 DOI: 10.1038/celldisc.2015.26] [Citation(s) in RCA: 67] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2015] [Accepted: 08/03/2015] [Indexed: 12/17/2022] Open
Abstract
Transforming growth factor-β (TGF-β) induces apoptosis in many types of cancer cells and acts as a tumor suppressor. We performed a functional analysis of TGF-β signaling to identify a molecular mechanism that regulated survival in small cell lung cancer cells. Here, we found low expression of TGF-β type II receptor (TβRII) in most small cell lung cancer cells and tissues compared to normal lung epithelial cells and normal lung tissues, respectively. When wild-type TβRII was overexpressed in small cell lung cancer cells, TGF-β suppressed cell growth in vitro and tumor formation in vivo through induction of apoptosis. Components of polycomb repressive complex 2, including enhancer of zeste 2 (EZH2), were highly expressed in small cell lung cancer cells; this led to epigenetic silencing of TβRII expression and suppression of TGF-β-mediated apoptosis. Achaete-scute family bHLH transcription factor 1 (ASCL1; also known as ASH1), a Smad-dependent target of TGF-β, was found to induce survival in small cell lung cancer cells. Thus, EZH2 promoted small cell lung cancer progression by suppressing the TGF-β-Smad-ASCL1 pathway.
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Carter G, Miladinovic B, Patel AA, Deland L, Mastorides S, Patel NA. Circulating long noncoding RNA GAS5 levels are correlated to prevalence of type 2 diabetes mellitus. BBA CLINICAL 2015; 4:102-7. [PMID: 26675493 PMCID: PMC4661729 DOI: 10.1016/j.bbacli.2015.09.001] [Citation(s) in RCA: 125] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 09/03/2015] [Accepted: 09/08/2015] [Indexed: 12/16/2022]
Abstract
Background Diabetes mellitus (DM), a metabolic disease, is characterized by impaired fasting glucose levels. Type 2 DM is adult onset diabetes. Long non-coding RNAs (lncRNAs) regulate gene expression and multiple studies have linked lncRNAs to human diseases. Methods Serum samples obtained from 96 participating veterans at JAH VA were deposited in the Research Biospecimen Repository. We used a two-stage strategy to identify an lncRNA whose levels correlated with T2DM. Initially we screened five serum samples from diabetic and non-diabetic individuals using lncRNA arrays. Next, GAS5 lncRNA levels were analyzed in 96 serum samples using quantitative PCR. Receiver operating characteristic (ROC) analysis was performed to determine the optimal cutoff GAS5 for diagnosis of DM. Results Our results demonstrate that decreased GAS5 levels in serum were associated with diabetes in a cohort of US military veterans. The ROC analysis revealed an optimal cutoff GAS5 value of less than or equal to 10. qPCR results indicated that individuals with absolute GAS5 < 10 ng/μl have almost twelve times higher odds of having diabetes (Exact Odds Ratio [OR] = 11.79 (95% CI: 3.97, 37.26), p < 0.001). Analysis indicated area under curve (AUC) of ROC of 0.81 with 85.1% sensitivity and 67.3% specificity in distinguishing non-diabetic from diabetic subjects. The positive predictive value is 71.4%. Conclusion lncRNA GAS5 levels are correlated to prevalence of T2DM. General Significance Assessment of GAS5 in serum along with other parameters offers greater accuracy in identifying individuals at-risk for diabetes. Serum samples from participating veterans were analyzed. Levels of serum lncRNAs were analyzed for correlation to diabetes. ROC analysis was performed to determine GAS5 optimal cutoff. Individuals with absolute GAS5 < 10 ng/μl have almost 12 times higher odds of diabetes. We identified GAS5 lncRNA as significant indicator of diabetes.
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Affiliation(s)
- Gay Carter
- James A. Haley Veterans Hospital, Tampa, FL 33612, United States
| | | | | | - Lauren Deland
- James A. Haley Veterans Hospital, Tampa, FL 33612, United States
| | | | - Niketa A Patel
- James A. Haley Veterans Hospital, Tampa, FL 33612, United States ; University of South Florida, Tampa, FL 33612, United States
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Wang Y, Wu K, Yang Z, Zhao Q, Fan D, Xu P, Nie Y, Fan D. Multidrug-Resistance Related Long Non-Coding RNA Expression Profile Analysis of Gastric Cancer. PLoS One 2015; 10:e0135461. [PMID: 26291830 PMCID: PMC4546299 DOI: 10.1371/journal.pone.0135461] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2014] [Accepted: 07/22/2015] [Indexed: 12/15/2022] Open
Abstract
The effect of chemotherapy of gastric cancer (GC) remains very poor because of multidrug resistance (MDR). However, the mechanisms underlying MDR of GC remains far from fully understood. The aim of this study is to illustrate the potential mechanisms of the MDR of GC at mainly the long non-coding RNA (lncRNA) level. In this study, GC cell line, SGC7901, and two MDR sublines, SGC7901/VCR and SGC7901/ADR were subjected to an lncRNA microarray analysis. Bioinformatics and verification experiments were performed to investigate the potential lncRNAs involved in the development of MDR. Pathway analysis indicated that 15 pathways corresponded to down-regulated transcripts and that 20 pathways corresponded to up-regulated transcripts (p-value cut-off is 0.05). GO analysis showed that the highest enriched GOs targeted by up-regulated transcripts were “system development” and the highest esenriched GOs targeted by the down-regulated transcripts were “sterol biosynthetic process”. Our study is the first to interrogate differentially expressed lncRNAs in human GC cell line and MDR sublines and indicates that lncRNAs are worthwhile for further study to be the novel candidate biomarkers for the clinical diagnosis of MDR and potential targets for further therapy.
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Affiliation(s)
- Ying Wang
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, 15 Changlexi Road, Xi'an, Shaanxi, China; Department of Oncology, First Affiliated Hospital of Henan University of Science and Technology, 24 Jinghua Road, Luoyang, Henan, China
| | - Kaichun Wu
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, 15 Changlexi Road, Xi'an, Shaanxi, China
| | - Zhiping Yang
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, 15 Changlexi Road, Xi'an, Shaanxi, China
| | - Qingchuan Zhao
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, 15 Changlexi Road, Xi'an, Shaanxi, China
| | - Dongmei Fan
- Department of Gynaecology and Obstetrics, First Affiliated Hospital of Henan University of Science and Technology, 24 Jinghua Road, Luoyang, Henan, China
| | - Po Xu
- Department of Urology, First Affiliated Hospital of Henan University of Science and Technology, 24 Jinghua Road, Luoyang, Henan, China
| | - Yongzhan Nie
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, 15 Changlexi Road, Xi'an, Shaanxi, China
| | - Daiming Fan
- State Key Laboratory of Cancer Biology and Xijing Hospital of Digestive Diseases, Fourth Military Medical University, 15 Changlexi Road, Xi'an, Shaanxi, China
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Zhu HQ, Zhou X, Chang H, Li HG, Liu FF, Ma CQ, Lu J. Aberrant Expression of CCAT1 Regulated by c-Myc Predicts the Prognosis of Hepatocellular Carcinoma. Asian Pac J Cancer Prev 2015. [DOI: 10.7314/apjcp.2015.16.13.5181] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023] Open
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Abstract
Recent systematic genomic studies have revealed a broad spectrum of lncRNAs that are involved in a variety of disease (diseases), including tumor progression, by regulating gene expression at epigenetic, transcriptional and post-transcriptional levels. However, their exact roles of physiological function and the mechanism (mechanisms) of action are yet to be clarified. In breast cancer research, several lncRNAs are identified as tumor driving oncogenic lncRNAs and few are identified as tumor suppressive lncRNAs. They are involved in cell growth, apoptosis, cell migration and invasiveness as well as cancer cell stemness. Therefore, this new class of RNAs may serve as biomarkers for diagnostic and prognostic purpose and also as potential therapeutic targets. This review summarizes the current information about lncRNAs that are particularly involved in breast cancer progression and also discusses the potential translational application of these newly discovered nucleic acids.
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Affiliation(s)
| | - Sambad Sharma
- 2500 N. State, Jackson MS 39216, University of Mississippi Medical Center, Cancer Institute
| | - Kounosuke Watabe
- Pathology Unit, Istituto Nazionale Tumori Fondazione "G. Pascale", via Mariano Semmola 80131, Napoli, Italy,
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Motizuki M, Saitoh M, Miyazawa K. Maid is a negative regulator of transforming growth factor-β-induced cell migration. J Biochem 2015; 158:435-44. [PMID: 26002959 DOI: 10.1093/jb/mvv054] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 05/16/2015] [Indexed: 12/19/2022] Open
Abstract
Maternal Id-like molecule (Maid) is a dominant negative helix-loop-helix protein that has been implicated in regulating gene expression as well as cell-cycle progression. Overexpressed Maid was previously shown to inhibit certain cellular responses induced by transforming growth factor-β (TGF-β), such as TGF-β-induced cytostasis and cell motility, but not epithelial-mesenchymal transition (EMT). The role of endogenous Maid in regulating TGF-β signalling, however, has not been elucidated. We have found evidence that endogenous Maid negatively regulates TGF-β-induced cell motility. Maid knockdown enhanced TGF-β-induced cell motility as measured by chamber migration and wound healing assays but did not affect cell motility induced by bone morphogenetic protein (BMP)-4. Endogenous Maid does not appear to be involved in regulating TGF-β-induced cytostasis, resistance to apoptosis or EMT. Notably, Maid expression was induced in the delayed phase (later than 24 h) after TGF-β stimulation whereas the expression of two other negative feedback regulators, Smad7 and SnoN, was induced as early as 1 h after stimulation. These findings indicate that Maid is a unique negative feedback regulator of TGF-β signalling in its mode of action as well as the timing of its induction.
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Affiliation(s)
- Mitsuyoshi Motizuki
- Department of Biochemistry, Interdisciplinary Graduate School of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan
| | - Masao Saitoh
- Department of Biochemistry, Interdisciplinary Graduate School of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan
| | - Keiji Miyazawa
- Department of Biochemistry, Interdisciplinary Graduate School of Medicine, University of Yamanashi, Yamanashi 409-3898, Japan
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Wang J, Chen L, Li H, Yang J, Gong Z, Wang B, Zhao X. Clopidogrel reduces apoptosis and promotes proliferation of human vascular endothelial cells induced by palmitic acid via suppression of the long non-coding RNA HIF1A-AS1 in vitro. Mol Cell Biochem 2015; 404:203-10. [PMID: 25761653 DOI: 10.1007/s11010-015-2379-1] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2014] [Accepted: 03/05/2015] [Indexed: 02/07/2023]
Abstract
Cardiovascular disease (CVD) is recognized as a major and increasing health problem affected older subjects in China, and clopidogrel has been widely used for treatment of CVD patients such as atherosclerosis, myocardial infarction, and myocardial ischaemia-reperfusion damage. However, the molecular mechanisms of clopidogrel for treatment of CVD are only partially understood. This study investigated the effects of clopidogrel on palmitic acid-induced damage of human vascular endothelial cells (HUVECs), and the molecular mechanisms of LncRNA HIF1A-AS1 in regulating the proliferation and apoptosis of HUVECs in vitro. We firstly established a damage model of HUVECs through palmitic acid (PA) treatment. And the effect of clopidogrel reducing PA-induced apoptosis of HUVECs was observed by the flow cytometric measurement. To further understand the molecular mechanism of clopidogrel rescues PA-induced apoptosis, we used human LncRNA PCR array to compare the LncRNA expression profile difference between clopidogrel-treated cells and control cells. The expression of LncRNA HIF 1 alpha-antisense RNA 1 (HIF1A-AS1) was significantly altered in clopidogrel-treated cells. We further proved that suppression of HIF1A-AS1 by siRNA reduce PA-induced apoptosis and promote proliferation of HUVECs. Furthermore, we also demonstrated inhibition apoptosis effect by HIF1A-AS1 is related to mitochondrial apoptosis pathway. Hence, our results suggest that clopidogrel rescues apoptosis and promotes proliferation of PA-induced damage model of HUVECs through inhibiting the mediator LncRNA HIF1A-AS1. These findings indicate that LncRNA HIF1A-AS1 may play an important role in the pathogenesis of CVD, and provide a novel molecular mechanism of clopidogrel for treatment of CVD.
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Affiliation(s)
- Jing Wang
- Department of Rheumatology, The First People's Hospital of Yunnan Province, Kunming, Yunnan, China
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