1
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Dempsey JL, Ioannou GN, Carr RM. Mechanisms of Lipid Droplet Accumulation in Steatotic Liver Diseases. Semin Liver Dis 2023; 43:367-382. [PMID: 37799111 DOI: 10.1055/a-2186-3557] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/07/2023]
Abstract
The steatotic diseases of metabolic dysfunction-associated steatotic liver disease (MASLD), alcohol-associated liver disease (ALD), and chronic hepatitis C (HCV) account for the majority of liver disease prevalence, morbidity, and mortality worldwide. While these diseases have distinct pathogenic and clinical features, dysregulated lipid droplet (LD) organelle biology represents a convergence of pathogenesis in all three. With increasing understanding of hepatocyte LD biology, we now understand the roles of LD proteins involved in these diseases but also how genetics modulate LD biology to either exacerbate or protect against the phenotypes associated with steatotic liver diseases. Here, we review the history of the LD organelle and its biogenesis and catabolism. We also review how this organelle is critical not only for the steatotic phenotype of liver diseases but also for their advanced phenotypes. Finally, we summarize the latest attempts and challenges of leveraging LD biology for therapeutic gain in steatotic diseases. In conclusion, the study of dysregulated LD biology may lead to novel therapeutics for the prevention of disease progression in the highly prevalent steatotic liver diseases of MASLD, ALD, and HCV.
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Affiliation(s)
- Joseph L Dempsey
- Division of Gastroenterology, Department of Medicine, School of Medicine, University of Washington, Seattle, Washington
| | - George N Ioannou
- Division of Gastroenterology, Department of Medicine, School of Medicine, University of Washington, Seattle, Washington
- Division of Gastroenterology, Veterans Affairs Puget Sound Healthcare System Seattle, Washington
| | - Rotonya M Carr
- Division of Gastroenterology, Department of Medicine, School of Medicine, University of Washington, Seattle, Washington
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2
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Niu B, Xia X, Ma L, Yao L, Zhang Y, Su H. LncRNA AC040162.3 Promotes HCV-Induced T2DM Deterioration through the miRNA-223-3p/NLRP3 Molecular Axis. Anal Cell Pathol (Amst) 2023; 2023:5350999. [PMID: 37359091 PMCID: PMC10290564 DOI: 10.1155/2023/5350999] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2022] [Revised: 05/25/2023] [Accepted: 06/07/2023] [Indexed: 06/28/2023] Open
Abstract
Background Diabetes is one of the most common diseases and major public health burdens worldwide. Type 2 diabetes mellitus (T2DM) is associated with chronic hepatitis C virus (HCV) infection, and lncRNAs play an important role in HCV-induced T2DM. We aimed to explore the effect of lncRNA AC040162.3 on HCV-induced T2DM. Methods HCV was used to infect MIN6 cells to establish an in vitro model. HCV copy number and miRNA expression were detected by Real Time Quantitative PCR (RT-qPCR). Enzyme-Linked Immunosorbent Assay (ELISA) was used to detect the secretion of insulin, and methyl thiazolyl tetrazolium (MTT) was applied to analyze cell viability. Apoptosis was analyzed by Western blotting and flow cytometry. In addition, Western blotting and TdT-mediated dUTP Nick End Labeling (TUNEL) were used to analyze pyroptosis. Luciferase reporter assays were used to investigate the targeting relationship. Results The expression of LncRNA AC040162.3 and NLRP3 was markedly increased in HCV-T2DM, while the expression of miR-223-3p was remarkably inhibited. In vitro experiments demonstrated that lncRNA AC040162.3 silencing or miR-223-3p overexpression remarkably alleviated HCV-induced T2DM deterioration by inhibiting cell apoptosis and pyroptosis and enhancing cell viability. We then demonstrated that silencing lncRNA AC040162.3 promoted the expression of miR-223-3p and that miR-223-3p bound to lncRNA AC040162.3 and the NLRP3 binding site. In addition, the protective effects of LncRNA AC040162.3 silencing in HCV-infected MIN6 cells were reversed by overexpression of NLRP3 or silencing of miR-223-3p. Conclusion Silencing of lncRNA AC040162.3 alleviates the process of HCV-induced T2DM by governing the miR-223-3p/NLRP3 axis.
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Affiliation(s)
- Ben Niu
- Department of Endocrinology and Metabolism, The First People's Hospital of Yunnan Province, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Xueshan Xia
- Faculty of Life Science and Technology, Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Lijing Ma
- Department of Endocrinology and Metabolism, The First People's Hospital of Yunnan Province, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Lixuan Yao
- Department of Endocrinology and Metabolism, The First People's Hospital of Yunnan Province, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Yating Zhang
- Department of Endocrinology and Metabolism, The First People's Hospital of Yunnan Province, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Heng Su
- Department of Endocrinology and Metabolism, The First People's Hospital of Yunnan Province, The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
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3
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Zheng K, Ren Z, Wang Y. Serine-arginine protein kinases and their targets in viral infection and their inhibition. Cell Mol Life Sci 2023; 80:153. [PMID: 37198350 PMCID: PMC10191411 DOI: 10.1007/s00018-023-04808-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2023] [Revised: 05/10/2023] [Accepted: 05/12/2023] [Indexed: 05/19/2023]
Abstract
Accumulating evidence has consolidated the interaction between viral infection and host alternative splicing. Serine-arginine (SR) proteins are a class of highly conserved splicing factors critical for the spliceosome maturation, alternative splicing and RNA metabolism. Serine-arginine protein kinases (SRPKs) are important kinases that specifically phosphorylate SR proteins to regulate their distribution and activities in the central pre-mRNA splicing and other cellular processes. In addition to the predominant SR proteins, other cytoplasmic proteins containing a serine-arginine repeat domain, including viral proteins, have been identified as substrates of SRPKs. Viral infection triggers a myriad of cellular events in the host and it is therefore not surprising that viruses explore SRPKs-mediated phosphorylation as an important regulatory node in virus-host interactions. In this review, we briefly summarize the regulation and biological function of SRPKs, highlighting their involvement in the infection process of several viruses, such as viral replication, transcription and capsid assembly. In addition, we review the structure-function relationships of currently available inhibitors of SRPKs and discuss their putative use as antivirals against well-characterized viruses or newly emerging viruses. We also highlight the viral proteins and cellular substrates targeted by SRPKs as potential antiviral therapeutic candidates.
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Affiliation(s)
- Kai Zheng
- School of Pharmacy, Shenzhen University Medical School, Shenzhen, 518055, China.
| | - Zhe Ren
- Institute of Biomedicine, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Key Laboratory of Innovative Technology Research On Natural Products and Cosmetics Raw Materials, Jinan University, Guangzhou, 510632, China
| | - Yifei Wang
- Institute of Biomedicine, College of Life Science and Technology, Guangdong Province Key Laboratory of Bioengineering Medicine, Key Laboratory of Innovative Technology Research On Natural Products and Cosmetics Raw Materials, Jinan University, Guangzhou, 510632, China
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4
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Bukhari I, Khan MR, Li F, Swiatczak B, Thorne RF, Zheng P, Mi Y. Clinical implications of lncRNA LINC-PINT in cancer. Front Mol Biosci 2023; 10:1097694. [PMID: 37006616 PMCID: PMC10064087 DOI: 10.3389/fmolb.2023.1097694] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Accepted: 02/24/2023] [Indexed: 03/19/2023] Open
Abstract
Long noncoding RNAs (lncRNAs) possess the potential for therapeutic targeting to treat many disorders, including cancers. Several RNA-based therapeutics (ASOs and small interfering RNAs) have gained FDA approval over the past decade. And with their potent effects, lncRNA-based therapeutics are of emerging significance. One important lncRNA target is LINC-PINT, with its universalized functions and relationship with the famous tumor suppressor gene TP53. Establishing clinical relevance, much like p53, the tumor suppressor activity of LINC-PINT is implicated in cancer progression. Moreover, several molecular targets of LINC-PINT are directly or indirectly used in routine clinical practice. We further associate LINC-PINT with immune responses in colon adenocarcinoma, proposing the potential utility of LINC-PINT as a novel biomarker of immune checkpoint inhibitors. Collectively, current evidence suggests LINC-PINT can be considered for use as a diagnostic/prognostic marker for cancer and several other diseases.
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Affiliation(s)
- Ihtisham Bukhari
- Henan Key Laboratory of Helicobacter pylori, Microbiota and Gastrointestinal Cancer, Marshall Medical Research Center, Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Muhammad Riaz Khan
- Research Center on Aging, Centre Intégré Universitaire de Santé et Services Sociaux de l'Estrie-Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, QC, Canada
| | - Fazhan Li
- Henan Key Laboratory of Helicobacter pylori, Microbiota and Gastrointestinal Cancer, Marshall Medical Research Center, Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
| | - Bartlomiej Swiatczak
- Department of History of Science and Scientific Archeology, University of Science and Technology of China, Hefei, China
| | - Rick Francis Thorne
- School of Environmental and Life Sciences, The University of Newcastle, Callaghan, NSW, Australia
- *Correspondence: Pengyuan Zheng, ; Yang Mi, ; Rick Francis Thorne,
| | - Pengyuan Zheng
- Henan Key Laboratory of Helicobacter pylori, Microbiota and Gastrointestinal Cancer, Marshall Medical Research Center, Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- *Correspondence: Pengyuan Zheng, ; Yang Mi, ; Rick Francis Thorne,
| | - Yang Mi
- Henan Key Laboratory of Helicobacter pylori, Microbiota and Gastrointestinal Cancer, Marshall Medical Research Center, Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China
- *Correspondence: Pengyuan Zheng, ; Yang Mi, ; Rick Francis Thorne,
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5
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Casella M, Lori G, Coppola L, La Rocca C, Tait S. BDE-47, -99, -209 and Their Ternary Mixture Disrupt Glucose and Lipid Metabolism of Hepg2 Cells at Dietary Relevant Concentrations: Mechanistic Insight through Integrated Transcriptomics and Proteomics Analysis. Int J Mol Sci 2022; 23:ijms232214465. [PMID: 36430946 PMCID: PMC9697228 DOI: 10.3390/ijms232214465] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/15/2022] [Accepted: 11/18/2022] [Indexed: 11/23/2022] Open
Abstract
Polybrominated diphenyl ethers (PBDEs) are persistent organic chemicals implied as flame retardants. Humans are mainly exposed to BDE-47, -99, and -209 congeners by diet. PBDEs are metabolic disruptors with the liver as the main target organ. To investigate their mode of action at a human-relevant concentration, we exposed HepG2 cells to these congeners and their mixture at 1 nM, analyzing their transcriptomic and proteomic profiles. KEGG pathways and GSEA Hallmarks enrichment analyses evidenced that BDE-47 disrupted the glucose metabolism and hypoxia pathway; all the congeners and the MIX affected lipid metabolism and signaling Hallmarks regulating metabolism as mTORC1 and PI3K/AKT/MTOR. These results were confirmed by glucose secretion depletion and increased lipid accumulation, especially in BDE-47 and -209 treated cells. These congeners also affected the EGFR/MAPK signaling; further, BDE-47 enriched the estrogen pathway. Interestingly, BDE-209 and the MIX increased ERα gene expression, whereas all the congeners and the MIX induced ERβ and PPARα. We also found that PBDEs modulated several lncRNAs and that HNRNAP1 represented a central hub in all the four interaction networks. Overall, the PBDEs investigated affected glucose and lipid metabolism with different underlying modes of action, as highlighted by the integrated omics analysis, at a dietary relevant concentration. These results may support the mechanism-based risk assessment of these compounds in relation to liver metabolism disruption.
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Affiliation(s)
- Marialuisa Casella
- Core Facilities, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy
| | - Gabriele Lori
- Center for Gender-Specific Medicine, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy
- Science Department, Università Degli Studi di Roma Tre, Viale Guglielmo Marconi 446, 00146 Rome, Italy
| | - Lucia Coppola
- Center for Gender-Specific Medicine, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy
- Department of Experimental Medicine, Sapienza University of Rome, Viale Regina Elena 324, 00161 Rome, Italy
| | - Cinzia La Rocca
- Center for Gender-Specific Medicine, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy
| | - Sabrina Tait
- Center for Gender-Specific Medicine, Istituto Superiore di Sanità, Viale Regina Elena 299, 00161 Rome, Italy
- Correspondence: ; Tel.: +39-06-49902839
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6
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Hong Y, Zhang Y, Zhao H, Chen H, Yu QQ, Cui H. The roles of lncRNA functions and regulatory mechanisms in the diagnosis and treatment of hepatocellular carcinoma. Front Cell Dev Biol 2022; 10:1051306. [PMID: 36467404 PMCID: PMC9716033 DOI: 10.3389/fcell.2022.1051306] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Accepted: 11/07/2022] [Indexed: 10/27/2023] Open
Abstract
Hepatocellular carcinoma (HCC) is the most frequent and deadly type of liver cancer. While the underlying molecular mechanisms are poorly understood, it is documented that lncRNAs may play key roles. Many HCC-associated lncRNAs have been linked to HBV and HCV infection, mediating gene expression, cell growth, development, and death. Studying the regulatory mechanisms and biological functions of HCC-related lncRNAs will assist our understanding of HCC pathogenesis as well as its diagnosis and management. Here, we address the potential of dysregulated lncRNAs in HCC as diagnostic and therapeutic biomarkers, and we evaluate the oncogenic or tumor-suppressive properties of these lncRNAs.
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Affiliation(s)
- Yuling Hong
- School of Clinical Medicine, Jining Medical University, Jining, China
| | - Yunxing Zhang
- Jining First People’s Hospital, Jining Medical College, Jining, China
| | - Haibo Zhao
- Jining First People’s Hospital, Jining Medical College, Jining, China
| | - Hailing Chen
- School of Clinical Medicine, Jining Medical University, Jining, China
| | - Qing-Qing Yu
- Jining First People’s Hospital, Jining Medical College, Jining, China
| | - Hongxia Cui
- Jining First People’s Hospital, Jining Medical College, Jining, China
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7
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Chen E, Yi J, Jiang J, Zou Z, Mo Y, Ren Q, Lin Z, Lu Y, Zhang J, Liu J. Identification and validation of a fatty acid metabolism-related lncRNA signature as a predictor for prognosis and immunotherapy in patients with liver cancer. BMC Cancer 2022; 22:1037. [PMID: 36195833 PMCID: PMC9531484 DOI: 10.1186/s12885-022-10122-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2022] [Accepted: 09/23/2022] [Indexed: 12/24/2022] Open
Abstract
Background Fatty acid (FA) metabolism is considered the emerging cause of tumor development and metastasis, driving poor prognosis. Long non-coding RNAs (lncRNAs) are closely related to cancer progression and play important roles in FA metabolism. Thus, the discovery of FA metabolism-related lncRNA signatures to predict outcome and immunotherapy response is critical in improving the survival of patients with hepatocellular carcinoma (HCC). Methods FA metabolism scores and a FA metabolism-related lncRNA signature were constructed using a single-sample gene set enrichment analysis based on The Cancer Genome Atlas (TCGA) and Gene Expression Omnibus (GEO) databases. “ConsensusClusterPlus” was used to screen molecular subtypes. Chi-squared test and Fisher’s exact test were applied to explore the relationship between clinical, genomic mutation characteristics and subtypes. Transcription factor (TF) activity scores, cellular distributions, immune cell infiltration, and immunotherapy response were employed to investigate the functions of FA metabolism-related lncRNA signatures. FA metabolism microarray and western blot were performed to detect the biological function of candidate lncRNAs. Results A total of 70 lncRNAs that highly correlated with FA metabolism scores in two cohorts were used to construct two distinct clusters. Patients in cluster 2 had lower FA metabolism scores and worse survival than those in cluster 1. Patients in cluster 2 exhibited a high frequency of DNA damage, gene mutations, oncogenic signaling such as epithelial-to-mesenchymal transition, and a high degree of immune cell infiltration. Moreover, the lncRNA signature could predict the effects of immunotherapy in patients with HCC. Furthermore, three lncRNAs (SNHG1, LINC00261, and SNHG7) were identified that were highly correlated with FA metabolism. Additionally, SNHG1 and SNHG7 were found to regulate various FA metabolism-related genes and ferroptosis-related genes in vitro experiments. GSEA analysis revealed that SNHG1 and SNHG7 promote fatty acid beta-oxidation. SNHG1 and SNHG7 silencing dramatically reduced lipid droplets in HCC cells. Many immune-infiltration genes and TFs were overexpressed in HCC tissues with SNHG1 and SNHG7 high expression. Conclusions A novel molecular model of FA metabolism-related lncRNAs was developed, which has significantly prognostic potential in HCC diagnosis and aids in clinical decision making. Supplementary Information The online version contains supplementary material available at 10.1186/s12885-022-10122-4.
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Affiliation(s)
- Erbao Chen
- School of Medicine, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China
| | - Jing Yi
- Hepato-Pancreato-Biliary Surgery, Peking University Shenzhen Hospital, Shenzhen, 518036, Guangdong, China
| | - Jing Jiang
- Department of Pathology, Peking University Shenzhen Hospital, Shenzhen, 518036, Guangdong, China
| | - Zhilin Zou
- Department of Ophthalmology, Affiliated Eye Hospital of Wenzhou Medical University, Wenzhou, 325027, Zhejiang, China
| | - Yuqian Mo
- School of Public Health, Guangdong Medical University, Zhanjiang, 524023, Guangdong, China
| | - Qingqi Ren
- Hepato-Pancreato-Biliary Surgery, Peking University Shenzhen Hospital, Shenzhen, 518036, Guangdong, China
| | - Zewei Lin
- Hepato-Pancreato-Biliary Surgery, Peking University Shenzhen Hospital, Shenzhen, 518036, Guangdong, China
| | - Yi Lu
- School of Medicine, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China
| | - Jian Zhang
- School of Medicine, Southern University of Science and Technology, Shenzhen, 518055, Guangdong, China. .,Guangdong Provincial Key Laboratory of Cell Microenvironment and Disease Research, Shenzhen, 518055, Guangdong, China.
| | - Jikui Liu
- Hepato-Pancreato-Biliary Surgery, Peking University Shenzhen Hospital, Shenzhen, 518036, Guangdong, China.
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8
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Bukhari I, Khan MR, Hussain MA, Thorne RF, Yu Y, Zhang B, Zheng P, Mi Y. PINTology: A short history of the lncRNA LINC-PINT in different diseases. WILEY INTERDISCIPLINARY REVIEWS. RNA 2022; 13:e1705. [PMID: 35019222 DOI: 10.1002/wrna.1705] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2021] [Revised: 11/09/2021] [Accepted: 11/17/2021] [Indexed: 12/24/2022]
Abstract
LINC-PINT is a p53-induced long intergenic noncoding transcript that plays a crucial role in many diseases, especially cancer. This long noncoding RNA (lncRNA) gene produces in total 102 (LNCipedia) alternatively spliced variants (LINC-PINT:1 to LINC-PINT:102). The functions of known variants include RNA transcripts, host transcripts for circular RNA (circRNA) generation and as sources for the translation of short peptides. In most human tumors, LINC-PINT is down-regulated where it serves as a tumor suppressor. However, the diversity of its functions in other maladies signifies its general clinical importance. Current LINC-PINT molecular functions include RNA-protein interactions, miRNA sponging and epigenetic modulation with these mechanisms operating in different cellular contexts to exert effects on biological processes ranging from DNA damage responses, cell cycle and growth arrest, senescence, cell migration and invasion, and apoptosis. Genetic polymorphisms in LINC-PINT have also been functionally associated with cancer and other pathologies including the autoimmune diseases pemphigus foliaceus and arthritis. Hence, LINC-PINT shows great potential as a clinical biomarker, especially for the diagnosis and prognosis of cancer. In this review, we explore the current knowledge highlighting the distinctive molecular functions of LINC-PINT in specific cancers and other disease states. This article is categorized under: RNA in Disease and Development > RNA in Disease.
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Affiliation(s)
- Ihtisham Bukhari
- Henan Key Laboratory of Helicobacter pylori, Microbiota and Gastrointestinal Cancer, Marshall Medical Research Center, Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,Department of Gastroenterology, Fifth Affiliated hospital of Zhengzhou University, Zhengzhou, China
| | - Muhammad Riaz Khan
- Research Center on Aging, Centre Intégré Universitaire de Santé et Services Sociaux de l'Estrie - Centre Hospitalier Universitaire de Sherbrooke, Sherbrooke, Quebec, Canada.,Department of Biochemistry and Functional Genomics, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Mohammed Amir Hussain
- Department of Biochemistry and Functional Genomics, Faculty of Medicine and Health Sciences, Université de Sherbrooke, Sherbrooke, Quebec, Canada.,Département de Médecine, Faculté de Médecine et des Sciences de la Santé, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Rick Francis Thorne
- Translational Research Institute, Henan Provincial People's Hospital, School of Clinical Medicine, Henan University, Zhengzhou, China.,School of Environmental & Life Sciences, The University of Newcastle, Callaghan, New South Wales, Australia
| | - Yong Yu
- Henan Key Laboratory of Helicobacter pylori, Microbiota and Gastrointestinal Cancer, Marshall Medical Research Center, Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,Department of Gastroenterology, Fifth Affiliated hospital of Zhengzhou University, Zhengzhou, China
| | - Bingyong Zhang
- Department of Gastroenterology, Henan Provincial People's Hospital, School of Clinical Medicine, Henan University, Zhengzhou, China
| | - Pengyuan Zheng
- Henan Key Laboratory of Helicobacter pylori, Microbiota and Gastrointestinal Cancer, Marshall Medical Research Center, Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,Department of Gastroenterology, Fifth Affiliated hospital of Zhengzhou University, Zhengzhou, China
| | - Yang Mi
- Henan Key Laboratory of Helicobacter pylori, Microbiota and Gastrointestinal Cancer, Marshall Medical Research Center, Fifth Affiliated Hospital of Zhengzhou University, Zhengzhou, China.,Department of Gastroenterology, Fifth Affiliated hospital of Zhengzhou University, Zhengzhou, China
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9
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Emerging roles and potential clinical applications of long non-coding RNAs in hepatocellular carcinoma. Biomed Pharmacother 2022; 153:113327. [PMID: 35779423 DOI: 10.1016/j.biopha.2022.113327] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2022] [Revised: 06/20/2022] [Accepted: 06/22/2022] [Indexed: 12/23/2022] Open
Abstract
Hepatocellular carcinoma is one of the most common highly malignant tumors in humans, as well as the leading cause of cancer-related death worldwide. Growing evidence has indicated that lncRNAs are implicated in different molecular mechanisms, including interactions with DNA, RNA, or protein, so that to regulate the gene expression at epigenetic, transcriptional, or posttranscriptional level. Moreover, the mechanism of action of lncRNA is closely related to its subcellular localization. An increasing number of studies have certified that lncRNA plays a significant biological function in the occurrence and development of hepatocellular carcinoma, such as involving in cell proliferation, metastasis, apoptosis, ferroptosis, autophagy, and reprogramming of energy metabolism. As a result, lncRNA has great potential as a novel biomarker for diagnosis or therapeutics of hepatocellular carcinoma. In this review, we highlight the correlation between subcellular localization of lncRNA and its mechanism of action, discuss the biological roles of lncRNA and the latest research advances in hepatocellular carcinoma, and emphasize the potential of lncRNA as a therapeutic target for advanced patients of hepatocellular carcinoma.
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10
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Sur S, Ray RB. Emerging role of lncRNA ELDR in development and cancer. FEBS J 2022; 289:3011-3023. [PMID: 33860640 DOI: 10.1111/febs.15876] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2021] [Revised: 03/31/2021] [Accepted: 04/12/2021] [Indexed: 02/06/2023]
Abstract
Whole-genome sequencing and transcriptome analysis revealed more than 90% of the human genome transcribes noncoding RNAs including lncRNAs. From the beginning of the 21st century, lncRNAs have gained widespread attention as a new layer of regulation in biological processes. lncRNAs are > 200 nucleotides in size, transcribed by RNA polymerase II, and share many similarities with mRNAs. lncRNA interacts with DNA, RNA, protein, and miRNAs, thereby regulating many biological processes. In this review, we have focused mainly on LINC01156 [also known as the EGFR long non-coding downstream RNA (ELDR) or Fabl] and its biological importance. ELDR is a newly identified lncRNA and first reported in a mouse model, but it has a human homolog. The human ELDR gene is closely localized downstream of epidermal growth factor receptor (EGFR) gene at chromosome 7 on the opposite strand. ELDR is highly expressed in neuronal stem cells and associated with neuronal differentiation and mouse brain development. ELDR is upregulated in head and neck cancer, suggesting its role as an oncogene and its importance in prognosis and therapy. Publicly available RNA-seq data further support its oncogenic potential in different cancers. Here, we summarize all the aspects of ELDR in development and cancer, highlighting its future perspectives in the context of mechanism.
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Affiliation(s)
- Subhayan Sur
- Department of Pathology, Saint Louis University, MO, USA
| | - Ratna B Ray
- Department of Pathology, Saint Louis University, MO, USA.,Cancer Center, Saint Louis University, MO, USA
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11
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Zhang WY, Zhan HL, Li MK, Wu GD, Liu Z, Wu LF. Long noncoding RNA Gas5 induces cell apoptosis and inhibits tumor growth via activating the CHOP-dependent endoplasmic reticulum stress pathway in human hepatoblastoma HepG2 cells. J Cell Biochem 2022; 123:231-247. [PMID: 34636091 DOI: 10.1002/jcb.30159] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2021] [Revised: 09/24/2021] [Accepted: 09/28/2021] [Indexed: 02/05/2023]
Abstract
In recent years, long noncoding RNAs (lncRNAs) have been demonstrated to be important tumor-associated regulatory factors. LncRNA growth arrest-specific transcript 5 (Gas5) acts as an anti-oncogene in most cancers. Whether Gas5 acts as an oncogene or anti-oncogene in hepatocellular carcinoma (HCC) remains unclear. In the present study, the expression and role of Gas5 in HCC were investigated in vitro and in vivo. Lower expression levels of Gas5 were determined in HCC tissues and cells by quantitative reverse transcription-polymerase chain reaction. Overexpressed Gas 5 lentiviral vectors were constructed to analyze their influence on cell viability, migration, invasion, and apoptosis. Fluorescence in situ hybridization was used to identify the subcellular localization of Gas5. Protein complexes that bound to Gas5 were isolated from HepG2 cells through pull-down experiments and analyzed by mass spectrometry. A series of novel Gas5-interacting proteins were identified and bioinformatics analysis was carried out. These included ribosomal proteins, proteins involved in protein folding, sorting, and transportation in the ER, some nucleases and protein enzymes involved in gene transcription, translation, and other proteins with various functions.78 kDa glucose-regulated protein (GRP78) was identified as a direct target of Gas5 by Rip-qPCR and Western blot analysis assay. Gas5 inhibited HepG2 cell growth and induced cell apoptosis via upregulating CHOP to activate the ER stress signaling pathway. Further studies indicated that the knockdown of CHOP by shRNA partially reversed Gas5-mediated apoptosis in HepG2 cells. Magnetic resonance imaging showed that the ectopic expression of Gas5 inhibited the growth of HCC in nude mice. These findings suggest that Gas5 functions as a tumor suppressor and induces apoptosis through activation of ER stress by targeting the CHOP signal pathway in HCC.
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Affiliation(s)
- Wei-Yi Zhang
- Department of Gastroenterology, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Hao-Lian Zhan
- Department of Gastroenterology, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Ming-Kai Li
- Department of Gastroenterology, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Guan-Di Wu
- State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine, Sun Yat-Sen University Cancer Center, Guangzhou, Guangdong Province, China
| | - Zhe Liu
- Department of Gastroenterology, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong Province, China
| | - Ling-Fei Wu
- Department of Gastroenterology, Second Affiliated Hospital, Shantou University Medical College, Shantou, Guangdong Province, China
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12
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Liao Y, Guo S, Liu G, Qiu Z, Wang J, Yang D, Tian X, Qiao Z, Ma Z, Liu Z. Host Non-Coding RNA Regulates Influenza A Virus Replication. Viruses 2021; 14:v14010051. [PMID: 35062254 PMCID: PMC8779696 DOI: 10.3390/v14010051] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/21/2021] [Accepted: 12/21/2021] [Indexed: 12/12/2022] Open
Abstract
Outbreaks of influenza, caused by the influenza A virus (IAV), occur almost every year in various regions worldwide, seriously endangering human health. Studies have shown that host non-coding RNA is an important regulator of host-virus interactions in the process of IAV infection. In this paper, we comprehensively analyzed the research progress on host non-coding RNAs with regard to the regulation of IAV replication. According to the regulation mode of host non-coding RNAs, the signal pathways involved, and the specific target genes, we found that a large number of host non-coding RNAs directly targeted the PB1 and PB2 proteins of IAV. Nonstructural protein 1 and other key genes regulate the replication of IAV and indirectly participate in the regulation of the retinoic acid-induced gene I-like receptor signaling pathway, toll-like receptor signaling pathway, Janus kinase signal transducer and activator of transcription signaling pathway, and other major intracellular viral response signaling pathways to regulate the replication of IAV. Based on the above findings, we mapped the regulatory network of host non-coding RNAs in the innate immune response to the influenza virus. These findings will provide a more comprehensive understanding of the function and mechanism of host non-coding RNAs in the cellular anti-virus response as well as clues to the mechanism of cell-virus interactions and the discovery of antiviral drug targets.
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Affiliation(s)
- Yuejiao Liao
- Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China; (Y.L.); (S.G.); (G.L.); (Z.Q.); (J.W.); (D.Y.); (Z.Q.); (Z.M.)
- Life Science and Engineering College, Northwest Minzu University, Lanzhou 730030, China;
| | - Shouqing Guo
- Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China; (Y.L.); (S.G.); (G.L.); (Z.Q.); (J.W.); (D.Y.); (Z.Q.); (Z.M.)
- Life Science and Engineering College, Northwest Minzu University, Lanzhou 730030, China;
| | - Geng Liu
- Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China; (Y.L.); (S.G.); (G.L.); (Z.Q.); (J.W.); (D.Y.); (Z.Q.); (Z.M.)
- Life Science and Engineering College, Northwest Minzu University, Lanzhou 730030, China;
| | - Zhenyu Qiu
- Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China; (Y.L.); (S.G.); (G.L.); (Z.Q.); (J.W.); (D.Y.); (Z.Q.); (Z.M.)
- Life Science and Engineering College, Northwest Minzu University, Lanzhou 730030, China;
| | - Jiamin Wang
- Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China; (Y.L.); (S.G.); (G.L.); (Z.Q.); (J.W.); (D.Y.); (Z.Q.); (Z.M.)
- Key Laboratory of Biotechnology & Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China
| | - Di Yang
- Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China; (Y.L.); (S.G.); (G.L.); (Z.Q.); (J.W.); (D.Y.); (Z.Q.); (Z.M.)
- Key Laboratory of Biotechnology & Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China
| | - Xiaojing Tian
- Life Science and Engineering College, Northwest Minzu University, Lanzhou 730030, China;
- Key Laboratory of Biotechnology & Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China
| | - Ziling Qiao
- Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China; (Y.L.); (S.G.); (G.L.); (Z.Q.); (J.W.); (D.Y.); (Z.Q.); (Z.M.)
- Key Laboratory of Biotechnology & Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China
| | - Zhongren Ma
- Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China; (Y.L.); (S.G.); (G.L.); (Z.Q.); (J.W.); (D.Y.); (Z.Q.); (Z.M.)
- Key Laboratory of Biotechnology & Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China
| | - Zhenbin Liu
- Gansu Tech Innovation Center of Animal Cell, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China; (Y.L.); (S.G.); (G.L.); (Z.Q.); (J.W.); (D.Y.); (Z.Q.); (Z.M.)
- Key Laboratory of Biotechnology & Bioengineering of State Ethnic Affairs Commission, Biomedical Research Center, Northwest Minzu University, Lanzhou 730030, China
- Correspondence:
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13
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Chen S, Zhao R, Wu T, Wang D, Wang B, Pan S, Hu X, Pan Z, Cui H. An Endogenous Retroviral LTR-Derived Long Noncoding RNA lnc-LTR5B Interacts With BiP to Modulate ALV-J Replication in Chicken Cells. Front Microbiol 2021; 12:788317. [PMID: 34912323 PMCID: PMC8667585 DOI: 10.3389/fmicb.2021.788317] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2021] [Accepted: 11/05/2021] [Indexed: 01/25/2023] Open
Abstract
Infection with the avian leukosis virus subgroup J (ALV-J) impairs host genes and facilitates the establishment of chronic infection and the viral life cycle. However, the involvement of long noncoding RNAs (lncRNAs) in ALV-J infection remains largely unknown. In this study, we identified a novel chicken lncRNA derived from LTR5B of the ERV-L family (namely lnc-LTR5B), which is significantly downregulated in ALV-J infected cells. lnc-LTR5B was localized in the cytoplasm and was relatively high expressed in the chicken lung and liver. Notably, the replication of ALV-J was inhibited by the overexpression of lnc-LTR5B but enhanced when lnc-LTR5B expression was knocked down. We further confirmed that lnc-LTR5B could bind to the binding immunoglobulin protein (BiP), a master regulator of endoplasmic reticulum (ER) function. Mechanistically, lnc-LTR5B serves as a competing endogenous RNA for BiP, restricting its physical availability. Upon ALV-J infection, the reduction of lnc-LTR5B released BiP, which facilitated its translocation to the cell surface. This is crucial for ALV-J entry as well as pro-survival signaling. In conclusion, we identified an endogenous retroviral LTR-activated lnc-LTR5B that is involved in regulating the cell surface translocation of BiP, and such regulatory machinery can be exploited by ALV-J to complete its life cycle and propagate.
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Affiliation(s)
- Shihao Chen
- Institute of Epigenetics and Epigenomics and College of Animal Science and Technology, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agricultural & Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, China.,Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China
| | - Ruihan Zhao
- Institute of Epigenetics and Epigenomics and College of Animal Science and Technology, Yangzhou University, Yangzhou, China.,College of Veterinary Medicine, Yangzhou University, Yangzhou, China
| | - Ting Wu
- Institute of Epigenetics and Epigenomics and College of Animal Science and Technology, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agricultural & Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Dedong Wang
- Institute of Epigenetics and Epigenomics and College of Animal Science and Technology, Yangzhou University, Yangzhou, China.,College of Veterinary Medicine, Yangzhou University, Yangzhou, China
| | - Biao Wang
- Institute of Epigenetics and Epigenomics and College of Animal Science and Technology, Yangzhou University, Yangzhou, China.,College of Veterinary Medicine, Yangzhou University, Yangzhou, China
| | - Shiyu Pan
- Institute of Epigenetics and Epigenomics and College of Animal Science and Technology, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agricultural & Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Xuming Hu
- Institute of Epigenetics and Epigenomics and College of Animal Science and Technology, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agricultural & Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, China
| | - Zhiming Pan
- Jiangsu Key Laboratory of Zoonosis, Yangzhou University, Yangzhou, China
| | - Hengmi Cui
- Institute of Epigenetics and Epigenomics and College of Animal Science and Technology, Yangzhou University, Yangzhou, China.,Joint International Research Laboratory of Agricultural & Agri-Product Safety, The Ministry of Education of China, Yangzhou University, Yangzhou, China.,Institute of Comparative Medicine, Yangzhou University, Yangzhou, China
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14
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Li Y, Liu P, Wei F. Long non‑coding RNA MBI‑52 inhibits the development of liver fibrosis by regulating the microRNA‑466g/SMAD4 signaling pathway. Mol Med Rep 2021; 25:33. [PMID: 34850963 PMCID: PMC8669687 DOI: 10.3892/mmr.2021.12549] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/09/2020] [Accepted: 06/30/2021] [Indexed: 12/13/2022] Open
Abstract
Liver fibrosis is a wound healing response triggered by liver injury. In severe cases, it may develop into liver cirrhosis, liver cancer and liver failure. Long non-coding RNAs (lncRNAs) play key roles in the development of liver fibrosis. The present study aimed to investigate the role of lncRNA-MBI-52 (lnc-MBI-52) in the progression of liver fibrosis. Carbon tetrachloride (CCl4)-induced injury was performed to establish a mouse liver fibrosis model, and exogenous transforming growth factor-β1 was used to establish a hepatic stellate cell (HSC) activation model. Reverse transcription-quantitative PCR and western blot analyses were performed to detect mRNA and protein expression, respectively. RNA pull-down assay was performed to assess the interaction between microRNA (miR)-466g and lnc-MBI-52 or SMAD4. Dual-luciferase reporter assay was performed to verify the target of miR-466g. lnc-MBI-52 was overexpressed in CCl4-induced mouse liver fibrosis models and activated HSCs. lnc-MBI-52 knockdown suppressed liver fibrosis in vitro. Moreover, knockdown of lnc-MBI-52 downregulated α-smooth muscle actin and collagen type I expression. In addition, lnc-MBI-52 and SMAD4 were identified as targets of miR-466g. The effects of lnc-MBI-52 on HSC activation were reversed following transfection with miR-466g mimics or SMAD4 knockdown. lnc-MBI-52 miR-466g significantly decreased lnc-MBI-52 expression, while overexpression of lnc-MBI-52 suppressed miR-466g expression. The results of the RNA pull-down assay confirmed the interaction between miR-466g and lnc-MBI-52. Taken together, lnc-MBI-52 induced liver fibrosis by regulating the miR-466g/SMAD4 axis, which may provide a new possible strategy for liver fibrosis.
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Affiliation(s)
- Yazhou Li
- Department of Pain Intervention, Baoji High‑tech People's Hospital, Baoji, Shaanxi 721000, P.R. China
| | - Peixiao Liu
- Department of Cardiopulmonary Rehabilitation, Xi'an International Medical Center Hospital, Xi'an, Shaanxi 710000, P.R. China
| | - Feipeng Wei
- Department of Interventional Radiology, Tangdu Hospital, Air Force Military Medical University, Xi'an, Shaanxi 710038, P.R. China
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15
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Ren Z, Yu Y, Chen C, Yang D, Ding T, Zhu L, Deng J, Xu Z. The Triangle Relationship Between Long Noncoding RNA, RIG-I-like Receptor Signaling Pathway, and Glycolysis. Front Microbiol 2021; 12:807737. [PMID: 34917069 PMCID: PMC8670088 DOI: 10.3389/fmicb.2021.807737] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 11/09/2021] [Indexed: 12/11/2022] Open
Abstract
Long noncoding RNA (LncRNA), a noncoding RNA over 200nt in length, can regulate glycolysis through metabolic pathways, glucose metabolizing enzymes, and epigenetic reprogramming. Upon viral infection, increased aerobic glycolysis providzes material and energy for viral replication. Mitochondrial antiviral signaling protein (MAVS) is the only protein-specified downstream of retinoic acid-inducible gene I (RIG-I) that bridges the gap between antiviral immunity and glycolysis. MAVS binding to RIG-I inhibits MAVS binding to Hexokinase (HK2), thereby impairing glycolysis, while excess lactate production inhibits MAVS and the downstream antiviral immune response, facilitating viral replication. LncRNAs can also regulate antiviral innate immunity by interacting with RIG-I and downstream signaling pathways and by regulating the expression of interferons and interferon-stimulated genes (ISGs). Altogether, we summarize the relationship between glycolysis, antiviral immunity, and lncRNAs and propose that lncRNAs interact with glycolysis and antiviral pathways, providing a new perspective for the future treatment against virus infection, including SARS-CoV-2.
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Affiliation(s)
- Zhihua Ren
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Yueru Yu
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Chaoxi Chen
- College of Life Since and Technology, Southwest Minzu University, Chengdu, China
| | - Dingyong Yang
- College of Animal Husbandry and Veterinary Medicine, Chengdu Agricultural College, Chengdu, China
| | - Ting Ding
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Ling Zhu
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Junliang Deng
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
| | - Zhiwen Xu
- Key Laboratory of Animal Disease and Human Health of Sichuan Province, College of Veterinary Medicine, Sichuan Agricultural University, Chengdu, China
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16
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Huang J, Wang J, He H, Huang Z, Wu S, Chen C, Liu W, Xie L, Tao Y, Cong L, Jiang Y. Close interactions between lncRNAs, lipid metabolism and ferroptosis in cancer. Int J Biol Sci 2021; 17:4493-4513. [PMID: 34803512 PMCID: PMC8579446 DOI: 10.7150/ijbs.66181] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Accepted: 10/01/2021] [Indexed: 12/19/2022] Open
Abstract
Abnormal lipid metabolism including synthesis, uptake, modification, degradation and transport has been considered a hallmark of malignant tumors and contributes to the supply of substances and energy for rapid cell growth. Meanwhile, abnormal lipid metabolism is also associated with lipid peroxidation, which plays an important role in a newly discovered type of regulated cell death termed ferroptosis. Long noncoding RNAs (lncRNAs) have been proven to be associated with the occurrence and progression of cancer. Growing evidence indicates that lncRNAs are key regulators of abnormal lipid metabolism and ferroptosis in cancer. In this review, we mainly summarized the mechanism by which lncRNAs regulate aberrant lipid metabolism in cancer, illustrated that lipid metabolism can also influence the expression of lncRNAs, and discussed the mechanism by which lncRNAs affect ferroptosis. A comprehensive understanding of the interactions between lncRNAs, lipid metabolism and ferroptosis could help us to develop novel strategies for precise cancer treatment in the future.
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Affiliation(s)
- Jingjing Huang
- The Key Laboratory of Model Animal and Stem Cell Biology in Hunan Province, Hunan Normal University, Changsha, 410013 Hunan, China.,School of Medicine, Hunan Normal University, Changsha, 410013 Hunan, China
| | - Jin Wang
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210013 Jiangsu, China
| | - Hua He
- The Key Laboratory of Model Animal and Stem Cell Biology in Hunan Province, Hunan Normal University, Changsha, 410013 Hunan, China.,School of Medicine, Hunan Normal University, Changsha, 410013 Hunan, China
| | - Zichen Huang
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210013 Jiangsu, China
| | - Sufang Wu
- The Key Laboratory of Model Animal and Stem Cell Biology in Hunan Province, Hunan Normal University, Changsha, 410013 Hunan, China.,School of Medicine, Hunan Normal University, Changsha, 410013 Hunan, China
| | - Chao Chen
- School of Medicine & Holistic Integrative Medicine, Nanjing University of Chinese Medicine, Nanjing, 210013 Jiangsu, China
| | - Wenbing Liu
- Department of Head and Neck Surgery, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410013 Hunan, P.R. China
| | - Li Xie
- Department of Head and Neck Surgery, The Affiliated Cancer Hospital of Xiangya School of Medicine, Central South University, Changsha, 410013 Hunan, P.R. China
| | - Yongguang Tao
- Key Laboratory of Carcinogenesis and Cancer Invasion, Ministry of Education, Department of Pathology, Xiangya Hospital, School of Basic Medicine, Central South University, Changsha, 410078 Hunan, China
| | - Li Cong
- The Key Laboratory of Model Animal and Stem Cell Biology in Hunan Province, Hunan Normal University, Changsha, 410013 Hunan, China.,School of Medicine, Hunan Normal University, Changsha, 410013 Hunan, China
| | - Yiqun Jiang
- The Key Laboratory of Model Animal and Stem Cell Biology in Hunan Province, Hunan Normal University, Changsha, 410013 Hunan, China.,School of Medicine, Hunan Normal University, Changsha, 410013 Hunan, China
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17
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Hepatitis C Virus Evades Interferon Signaling by Suppressing Long Noncoding RNA Linc-Pint Involving C/EBP-β. J Virol 2021; 95:e0095221. [PMID: 34160260 PMCID: PMC8354323 DOI: 10.1128/jvi.00952-21] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023] Open
Abstract
Hepatitis C virus (HCV) regulates many cellular genes in modulating the host immune system for benefit of viral replication and long-term persistence in a host for chronic infection. Long noncoding RNAs (lncRNAs) play an important role in the regulation of many important cellular processes, including immune responses. We recently reported that HCV infection downregulates lncRNA Linc-Pint (long intergenic non-protein-coding RNA p53-induced transcript) expression, although the mechanism of repression and functional consequences are not well understood. In this study, we demonstrate that HCV infection of hepatocytes transcriptionally reduces Linc-Pint expression through CCAAT/enhancer binding protein β (C/EBP-β). Subsequently, we observed that the overexpression of Linc-Pint significantly upregulates interferon alpha (IFN-α) and IFN-β expression in HCV-replicating hepatocytes. Using unbiased proteomics, we identified that Linc-Pint associates with DDX24, which enables RIP1 to interact with IFN-regulatory factor 7 (IRF7) of the IFN signaling pathway. We furthermore observed that IFN-α14 promoter activity was enhanced in the presence of Linc-Pint. Together, these results demonstrated that Linc-Pint acts as a positive regulator of host innate immune responses, especially IFN signaling. HCV-mediated downregulation of Linc-Pint expression appears to be one of the mechanisms by which HCV may evade innate immunity for long-term persistence and chronicity. IMPORTANCE The mechanism by which lncRNA regulates the host immune response during HCV infection is poorly understood. We observed that Linc-Pint was transcriptionally downregulated by HCV. Using a chromatin immunoprecipitation (ChIP) assay, we showed inhibition of transcription factor C/EBP-β binding to the Linc-Pint promoter in the presence of HCV infection. We further identified that Linc-Pint associates with DDX24 for immunomodulatory function. The overexpression of Linc-Pint reduces DDX24 expression, which in turn results in the disruption of DDX24-RIP1 complex formation and the activation of IRF7. The induction of IFN-α14 promoter activity in the presence of Linc-Pint further confirms our observation. Together, our results suggest that Linc-Pint acts as a positive regulator of host innate immune responses. Downregulation of Linc-Pint expression by HCV helps in escaping the innate immune system for the development of chronicity.
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