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Tran HT, Kondo T, Ashry A, Fu Y, Okawa H, Sawangmake C, Egusa H. Effect of circadian clock disruption on type 2 diabetes. Front Physiol 2024; 15:1435848. [PMID: 39165284 PMCID: PMC11333352 DOI: 10.3389/fphys.2024.1435848] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2024] [Accepted: 07/08/2024] [Indexed: 08/22/2024] Open
Abstract
Introduction Type 2 diabetes (T2D) is the predominant form of diabetes mellitus and is among the leading causes of death with an increasing prevalence worldwide. However, the pathological mechanism underlying T2D remains complex and unclear. An increasing number of studies have suggested an association between circadian clock disruption and high T2D prevalence. Method This review explores the physiological and genetic evidence underlying T2D symptoms associated with circadian clock disturbances, including insulin secretion and glucose metabolism. Results and Discussion Notably, circadian clock disruption reduces insulin secretion and insulin sensitivity and negatively affects glucose homeostasis. The circadian clock regulates the hypothalamic-pituitary-adrenal axis, an important factor that regulates glucose metabolism and influences T2D progression. Therefore, circadian clock regulation is an attractive, novel therapeutic approach for T2D, and various circadian clock stabilizers play therapeutic roles in T2D. Lastly, this review suggests novel therapeutic and preventive approaches using circadian clock regulators for T2D.
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Affiliation(s)
- Hong Thuan Tran
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Japan
- Stem Cell Institute, University of Science, Viet Nam National University Ho Chi Minh City, Ho Chi Minh, Vietnam
| | - Takeru Kondo
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Amal Ashry
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Yunyu Fu
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Hiroko Okawa
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Japan
| | - Chenphop Sawangmake
- Veterinary Clinical Stem Cell and Bioengineering Research Unit, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
- Veterinary Stem Cell and Bioengineering Innovation Center, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
- Department of Pharmacology, Faculty of Veterinary Science, Chulalongkorn University, Bangkok, Thailand
| | - Hiroshi Egusa
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of Dentistry, Sendai, Japan
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Altrieth A, Kenney J, Nelson D, Suarez E, Gellatly V, Gabunia S, Larsen M. Single-Cell Transcriptomic Analysis of Salivary Gland Endothelial Cells. J Dent Res 2024; 103:269-278. [PMID: 38411696 PMCID: PMC10985389 DOI: 10.1177/00220345231219987] [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] [Indexed: 02/28/2024] Open
Abstract
Vascular endothelial cells have important tissue-specific functions in fibrosis and regeneration. In the salivary gland, endothelial cells are required for proper development, but their roles within adult glands are largely unknown. To identify ligand-receptor interactions between endothelial cells and other cell types that may be important during fibrosis and regeneration, we used a reversible ductal ligation injury. To induce injury, a clip was applied to the primary ducts for 14 d, and to induce a regenerative response, the clip was subsequently removed for 5 d. To identify endothelial cell-produced factors, we used single-cell RNA sequencing of stromal-enriched cells from adult female submandibular and sublingual salivary glands. Transcriptional profiles of homeostatic salivary gland endothelial cells were compared to endothelial cells of other organs. Salivary gland endothelial cells expressed many unique genes and displayed the highest overlap in gene expression with other fenestrated endothelial cells from the colon, small intestine, and kidney. Comparison of the 14-d ligated, mock-ligated, and 5-d deligated stromal-enriched transcripts and lineage tracing revealed that endothelial cells retain their identity following ligation and recovery from injury. CellChat and NATMI were used to predict changes in ligand-receptor interactions from endothelial cells to other cells in response to ligation and deligation. CellChat and NATMI predicted that after ligation, interactions with fibroblasts, epithelial cells, and glial cells were increased, and following deligation, interactions with pericyte, glia, fibroblasts, and immune cells were increased. Some of the highest-ranked interactions predicted in ligated compared to mock endothelial cells were between glial cells via Col4a2-Cd93 and Jag2-Notch1, as well as epithelial cells via Pecam1-Cd38, while in deligated compared to ligated endothelial cells, the top interactions were between fibroblasts via Ntf3-Ntrk2, glial cells via Hspg2-Itgb1, and pericytes via Jam2-F11r. Understanding salivary gland endothelial cell signaling will inform future endothelial cell-based regenerative therapies.
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Affiliation(s)
- A.L. Altrieth
- Department of Biological Sciences and The RNA Institute, University at Albany, State University of New York, Albany, NY, USA
- Molecular, Cellular, Developmental, and Neural Biology Graduate Program, Department of Biological Sciences, University at Albany, State University of New York, Albany, NY, USA
- Department of Pathology & Laboratory Medicine, The University of North Carolina at Chapel Hill School of Medicine, Chapel Hill, NC 27599, USA
| | - J. Kenney
- Department of Biological Sciences and The RNA Institute, University at Albany, State University of New York, Albany, NY, USA
| | - D.A. Nelson
- Department of Biological Sciences and The RNA Institute, University at Albany, State University of New York, Albany, NY, USA
| | - E.G. Suarez
- Department of Biological Sciences and The RNA Institute, University at Albany, State University of New York, Albany, NY, USA
| | - V. Gellatly
- Department of Biological Sciences and The RNA Institute, University at Albany, State University of New York, Albany, NY, USA
- Molecular, Cellular, Developmental, and Neural Biology Graduate Program, Department of Biological Sciences, University at Albany, State University of New York, Albany, NY, USA
| | - S. Gabunia
- Department of Biological Sciences and The RNA Institute, University at Albany, State University of New York, Albany, NY, USA
| | - M. Larsen
- Department of Biological Sciences and The RNA Institute, University at Albany, State University of New York, Albany, NY, USA
- Molecular, Cellular, Developmental, and Neural Biology Graduate Program, Department of Biological Sciences, University at Albany, State University of New York, Albany, NY, USA
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Radwan SM, Abdel-Latif GA, Abbas SS, Elmongy NF, Wasfey EF. The beneficial effects of l-carnitine and infliximab in methotrexate-induced hepatotoxicity: Emphasis on Notch1/Hes-1 signaling. Arch Pharm (Weinheim) 2023; 356:e2300312. [PMID: 37625018 DOI: 10.1002/ardp.202300312] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2023] [Revised: 08/13/2023] [Accepted: 08/14/2023] [Indexed: 08/27/2023]
Abstract
Methotrexate (MTX)-induced hepatotoxicity is a serious adverse effect that may limit its use. Therefore, eligible drugs to ameliorate MTX-induced hepatotoxicity are required. l-Carnitine (LC) is a natural molecule with beneficial metabolic effects and infliximab (INF) is an anti-inflammatory monoclonal antibody against tumor necrosis factor-alpha (TNF-α). Recently, Notch1/Hes-1 signaling was found to play a key role in the pathogenesis of liver injury. However, its role in MTX-induced hepatotoxicity is unclear. This study aimed to evaluate the modulatory effects of LC or INF on MTX-induced hepatotoxicity and to explore the underlying mechanism with emphasis on the Notch1/Hes-1 signaling pathway. Sixty rats were randomized into six groups (n = 10): (1) control (saline); (2) MTX (20 mg/kg MTX, intraperitoneal [ip], once); (3) LC group (500 mg/kg ip, 5 days); (4) INF (7 mg/kg INF ip, once); (5) MTX+LC (20 mg/kg ip, once, 500 mg/kg ip, 5 days, respectively); (6) MTX+INF (20 mg/kg ip, once, 7 mg/kg INF ip, once, respectively). Oxidative stress, inflammatory markers, and Notch1/Hes-1 were investigated. MTX induced the expression of Notch1 and Hes-1 proteins and increased the levels of TNF-α, interleukin (IL)-6, and IL-1β in the liver. Cotreatment with LC or INF showed apparent antioxidant and anti-inflammatory effects. Interestingly, the downregulation of Notch1 and Hes-1 expression was more prominent in LC cotreatment as compared with INF. In conclusion, LC or INF attenuates MTX-induced hepatotoxicity through modulation of Notch1/Hes-1 signaling. The LC ameliorative effect against MTX-induced hepatotoxicity is significantly better than that of INF. Therefore, LC cotreatment may present a safe and therapeutically effective therapy in alleviating MTX-induced hepatotoxicity.
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Affiliation(s)
- Sara M Radwan
- Biochemistry Department, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
| | - Ghada A Abdel-Latif
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Misr International University (MIU), Cairo, Egypt
- Translational and Clinical Research Unit, Faculty of Pharmacy, Misr International University (MIU), Cairo, Egypt
| | - Samah S Abbas
- Pharmacology and Toxicology Department, Faculty of Pharmacy, Misr International University (MIU), Cairo, Egypt
- Translational and Clinical Research Unit, Faculty of Pharmacy, Misr International University (MIU), Cairo, Egypt
| | - Noura F Elmongy
- Physiology Department, Faculty of Medicine, Al-Azhar University, Damietta, Egypt
| | - Eman F Wasfey
- Biochemistry Department, Faculty of Pharmacy, Ain Shams University, Cairo, Egypt
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Murgo E, Colangelo T, Bellet MM, Malatesta F, Mazzoccoli G. Role of the Circadian Gas-Responsive Hemeprotein NPAS2 in Physiology and Pathology. BIOLOGY 2023; 12:1354. [PMID: 37887064 PMCID: PMC10603908 DOI: 10.3390/biology12101354] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/22/2023] [Revised: 10/14/2023] [Accepted: 10/20/2023] [Indexed: 10/28/2023]
Abstract
Neuronal PAS domain protein 2 (NPAS2) is a hemeprotein comprising a basic helix-loop-helix domain (bHLH) and two heme-binding sites, the PAS-A and PAS-B domains. This protein acts as a pyridine nucleotide-dependent and gas-responsive CO-dependent transcription factor and is encoded by a gene whose expression fluctuates with circadian rhythmicity. NPAS2 is a core cog of the molecular clockwork and plays a regulatory role on metabolic pathways, is important for the function of the central nervous system in mammals, and is involved in carcinogenesis as well as in normal biological functions and processes, such as cardiovascular function and wound healing. We reviewed the scientific literature addressing the various facets of NPAS2 and framing this gene/protein in several and very different research and clinical fields.
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Affiliation(s)
- Emanuele Murgo
- Department of Medical Sciences, Division of Internal Medicine and Chronobiology Laboratory, Fondazione IRCCS “Casa Sollievo della Sofferenza”, 71013 San Giovanni Rotondo, Italy;
| | - Tommaso Colangelo
- Department of Medical and Surgical Sciences, University of Foggia, Viale Pinto 1, 71100 Foggia, Italy;
- Cancer Cell Signaling Unit, Fondazione IRCCS “Casa Sollievo della Sofferenza”, 71013 San Giovanni Rotondo, Italy
| | - Maria Marina Bellet
- Department of Medicine and Surgery, University of Perugia, P.le L. Severi 1, 06132 Perugia, Italy;
| | - Francesco Malatesta
- Department of Biochemical Sciences “Alessandro Rossi Fanelli”, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy
| | - Gianluigi Mazzoccoli
- Department of Medical Sciences, Division of Internal Medicine and Chronobiology Laboratory, Fondazione IRCCS “Casa Sollievo della Sofferenza”, 71013 San Giovanni Rotondo, Italy;
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Chen Y, Song W, Zhang H, Ji X. MICALL2 participates in the regulation of epithelial-mesenchymal transition in alveolar epithelial cells - Potential roles in pulmonary fibrosis. Arch Biochem Biophys 2023; 747:109730. [PMID: 37690696 DOI: 10.1016/j.abb.2023.109730] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Revised: 08/10/2023] [Accepted: 08/23/2023] [Indexed: 09/12/2023]
Abstract
Epithelial-mesenchymal transition (EMT) of alveolar epithelial cells is a vital process in idiopathic pulmonary fibrosis (IPF), which results in the accumulation of fibroblasts and myofibroblasts and excessive extracellular matrix deposition. Based on RNA sequencing analysis and GEO dataset reanalysis, we screened out MICALL2, a gene upregulated in the lungs of IPF mice and alveolar epithelial type II (ATII) cells from IPF patients, and aimed to explore its role in IPF. We validated the expression of MICALL2 in bleomycin (BLM)-induced IPF mice and TGF-β1-stimulated ATII cells (primary murine ATII cells and A549 cells), and explored the role of MICALL2 in IPF by knockdown of MICALL2 in BLM-induced mice and TGF-β1-stimulated ATII cells. We found that MICALL2 was upregulated in the lungs of BLM-induced mice and TGF-β1-stimulated ATII cells. MICALL2-deficient mice had reduced fibrogenesis and restrained EMT upon BLM challenge. Knockdown of MICALL2 restrained the EMT process, in vitro, through impeding β-catenin nuclear translocation. Mechanistically, we demonstrated that NPAS2 is directly bound to the promoter of MICALL2. Altogether, our data revealed transactivation of MICALL2 induced by NPAS2, contributing to activation of the Wnt/β-catenin pathway in ATII cells, thus leading to the EMT process and subsequent pulmonary fibrosis. Interfering with MICALL2 may represent an innovative therapeutic target to mitigate the extent of IPF.
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Affiliation(s)
- Yingying Chen
- Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, Shenyang, 110022, China
| | - Wei Song
- Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, Shenyang, 110022, China
| | - He Zhang
- Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, Shenyang, 110022, China
| | - Xinping Ji
- Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, Shenyang, 110022, China.
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Chen Y, He Z, Zhao B, Zheng R. Downregulation of a potential therapeutic target NPAS2, regulated by p53, alleviates pulmonary fibrosis by inhibiting epithelial-mesenchymal transition via suppressing HES1. Cell Signal 2023:110795. [PMID: 37406788 DOI: 10.1016/j.cellsig.2023.110795] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 06/27/2023] [Accepted: 07/02/2023] [Indexed: 07/07/2023]
Abstract
Idiopathic pulmonary fibrosis (IPF) is a progressive lung disease and a severe form of pulmonary fibrosis. Epithelial-mesenchymal transition (EMT) of alveolar epithelial cells is induced in response to epithelial injury, which leads to the accumulation of extracellular matrix in the lung parenchyma and contributes to pulmonary fibrosis. NPAS2 (neuronal PAS domain protein 2) is significantly increased in the lung tissues of IPF patients according to microarray dataset GSE10667 and NPAS2 is downregulated in differentiated human pulmonary type 2 epithelial cells in vitro based on microarray dataset GSE3306 from Gene Expression Omnibus (GEO). In this study, we demonstrated that NPAS2 was increased in bleomycin (BLM)- induced fibrotic lungs in mice. Knockdown of NPAS2 inhibited EMT in primary mouse lung alveolar type 2 epithelial (pmATII) cells and human lung alveolar type 2 epithelial cell line A549 cells under BLM challenge in vitro. Moreover, the silence of NPAS2 alleviated the BLM-induced pulmonary fibrosis in a murine model. Mechanistically, NPAS2 promotes EMT through positively regulating hairy and enhancer of split 1 (HES1) expression. In this study, we present novel findings that have not been previously reported, emphasizing that p53 transcriptionally activates NPAS2 in ATII cells and overexpression of NPAS2 weakens the effects of TP53 knockdown on EMT of pmATII and A549 cells. Our results suggest NPAS2 is a novel target gene of p53 in regulating BLM-mediated EMT in ATII cells and pulmonary fibrosis.
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Affiliation(s)
- Yingying Chen
- Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Zhong He
- Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Bo Zhao
- Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Rui Zheng
- Department of Pulmonary and Critical Care Medicine, Shengjing Hospital of China Medical University, Shenyang 110004, China.
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Du C, Dong J, Wang Q, Xu C, Feng S, Feng R, Lv X, Li J, Zhang L, Huang C, Ma T. Hastatoside attenuatescarbon tetrachloride-induced liver fibrosis by targeting glycogen synthase kinase-3β. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 109:154585. [PMID: 36610117 DOI: 10.1016/j.phymed.2022.154585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 11/11/2022] [Accepted: 12/04/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Hastatoside is an iridoid glycoside extracted from the herb, Verbena officinalis, that exerts various pharmacological effects, including anti-inflammatory, sleep-promoting, and analgesic effects. However, only a few studies have reported the efficacy of hastatoside in liver fibrosis. Liver fibrosis is a pathophysiological process, and its persistence can seriously affect the quality of life and well-being of the patients. HYPOTHESIS/PURPOSE This study aimed to investigate the role of hastatoside on liver fibrosis and its possible underlying mechanisms. METHODS C57BL/6 J mice with carbon tetrachloride (CCl4)-induced hepatic fibrosis were used as the in vivo models. Histological features of the liver were observed using Masson's trichrome and hematoxylin-eosin staining. Alanine aminotransferase and aspartate aminotransferase levels and the hepatic fibrosis indices (type 3 procollagen, laminin, and hyaluronic acid) were measured using corresponding assay kits. LX-2 human hepatic stellate cells (HSCs) stimulated with the transforming growth factor β1 were used as the vitro models. Transfection of the glycogen synthase kinase (GSK)-3β small interfering RNA (siRNA) and β-catenin plasmids was also performed in vitro. Protein levels of GSK-3β, phospho-GSK-3β (Ser 9), α-smooth muscle actin, collagen type I alpha 1, c-Myc, cyclin D1, and β-catenin were determined via western blotting. Moreover, the p-GSK-3β:GSK-3β ratio was calculated to determine the GSK-3β activity. RESULTS Hastatoside prevented CCl4-induced liver injury and histological damage. It inhibited the upregulation of α-SMA and Col1α1 levels in a CCl4-induced mouse hepatic fibrosis model. In vitro, hastatoside inhibited the proliferation and activation of HSCs by decreasing the expression levels of cyclin D1 and c-Myc and the proportion of LX-2 cells activated in the G0/G1 phase. Molecular docking results showed that hastatoside bound to GSK-3β. Hastatoside significantly increased the GSK-3β activity and inhibited the downstream effector expression of β-catenin. CONCLUSION These findings suggest that hastatoside can bind to GSK-3β and promote its activity, while inhibiting the GSK-3β downstream effector expression of β-catenin, thereby inhibiting the activation and proliferation of HSCs, which further prevents the development of liver fibrosis. These results provide innovative insights into the underlying liver fibrosis. Moreover, hastatoside is a potential anti-fibrosis monomer that can potentially be used for the treatment of liver fibrosis.
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Affiliation(s)
- Changlin Du
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; Center of Traditional Chinese Medicine Formula Granule, Anhui Medical University, China
| | - Jiahui Dong
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; Center of Traditional Chinese Medicine Formula Granule, Anhui Medical University, China
| | - Qi Wang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; Center of Traditional Chinese Medicine Formula Granule, Anhui Medical University, China
| | - Chuanting Xu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; Center of Traditional Chinese Medicine Formula Granule, Anhui Medical University, China
| | - Shiqi Feng
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; Center of Traditional Chinese Medicine Formula Granule, Anhui Medical University, China
| | - Rui Feng
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; Center of Traditional Chinese Medicine Formula Granule, Anhui Medical University, China
| | - Xiongwen Lv
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; Center of Traditional Chinese Medicine Formula Granule, Anhui Medical University, China
| | - Jun Li
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China
| | - Lei Zhang
- Center of Traditional Chinese Medicine Formula Granule, Anhui Medical University, China
| | - Cheng Huang
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; Center of Traditional Chinese Medicine Formula Granule, Anhui Medical University, China.
| | - Taotao Ma
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, Anhui Institute of Innovative Drugs, School of Pharmacy, Anhui Medical University, China; Center of Traditional Chinese Medicine Formula Granule, Anhui Medical University, China.
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Taleb Z, Karpowicz P. Circadian regulation of digestive and metabolic tissues. Am J Physiol Cell Physiol 2022; 323:C306-C321. [PMID: 35675638 DOI: 10.1152/ajpcell.00166.2022] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The circadian clock is a self-sustained molecular timekeeper that drives 24-h (circadian) rhythms in animals. The clock governs important aspects of behavior and physiology including wake/sleep activity cycles that regulate the activity of metabolic and digestive systems. Light/dark cycles (photoperiod) and cycles in the time of feeding synchronize the circadian clock to the surrounding environment, providing an anticipatory benefit that promotes digestive health. The availability of animal models targeting the genetic components of the circadian clock has made it possible to investigate the circadian clock's role in cellular functions. Circadian clock genes have been shown to regulate the physiological function of hepatocytes, gastrointestinal cells, and adipocytes; disruption of the circadian clock leads to the exacerbation of liver diseases and liver cancer, inflammatory bowel disease and colorectal cancer, and obesity. Previous findings provide strong evidence that the circadian clock plays an integral role in digestive/metabolic disease pathogenesis, hence, the circadian clock is a necessary component in metabolic and digestive health and homeostasis. Circadian rhythms and circadian clock function provide an opportunity to improve the prevention and treatment of digestive and metabolic diseases by aligning digestive system tissue with the 24-h day.
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Affiliation(s)
- Zainab Taleb
- Department of Biomedical Sciences, University of Windsor, Windsor, Ontario, Canada
| | - Phillip Karpowicz
- Department of Biomedical Sciences, University of Windsor, Windsor, Ontario, Canada
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Jouffe C, Weger BD, Martin E, Atger F, Weger M, Gobet C, Ramnath D, Charpagne A, Morin-Rivron D, Powell EE, Sweet MJ, Masoodi M, Uhlenhaut NH, Gachon F. Disruption of the circadian clock component BMAL1 elicits an endocrine adaption impacting on insulin sensitivity and liver disease. Proc Natl Acad Sci U S A 2022; 119:e2200083119. [PMID: 35238641 PMCID: PMC8916004 DOI: 10.1073/pnas.2200083119] [Citation(s) in RCA: 45] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Accepted: 01/25/2022] [Indexed: 02/06/2023] Open
Abstract
SignificanceWhile increasing evidence associates the disruption of circadian rhythms with pathologic conditions, including obesity, type 2 diabetes, and nonalcoholic fatty liver diseases (NAFLD), the involved mechanisms are still poorly described. Here, we show that, in both humans and mice, the pathogenesis of NAFLD is associated with the disruption of the circadian clock combined with perturbations of the growth hormone and sex hormone pathways. However, while this condition protects mice from the development of fibrosis and insulin resistance, it correlates with increased fibrosis in humans. This suggests that the perturbation of the circadian clock and its associated disruption of the growth hormone and sex hormone pathways are critical for the pathogenesis of metabolic and liver diseases.
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Affiliation(s)
- Céline Jouffe
- Nestlé Research, Société des Produits Nestlé, CH-1015 Lausanne, Switzerland
- Department of Pharmacology and Toxicology, University of Lausanne, CH-1011 Lausanne, Switzerland
- Helmholtz Diabetes Center, Helmholtz Zentrum München, DE-85764 Neuherberg, Germany
| | - Benjamin D. Weger
- Nestlé Research, Société des Produits Nestlé, CH-1015 Lausanne, Switzerland
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia QLD 4072, Australia
| | - Eva Martin
- Nestlé Research, Société des Produits Nestlé, CH-1015 Lausanne, Switzerland
| | - Florian Atger
- Nestlé Research, Société des Produits Nestlé, CH-1015 Lausanne, Switzerland
- Department of Pharmacology and Toxicology, University of Lausanne, CH-1011 Lausanne, Switzerland
| | - Meltem Weger
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia QLD 4072, Australia
| | - Cédric Gobet
- Nestlé Research, Société des Produits Nestlé, CH-1015 Lausanne, Switzerland
- School of Life Sciences, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
| | - Divya Ramnath
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia QLD 4072, Australia
| | - Aline Charpagne
- Nestlé Research, Société des Produits Nestlé, CH-1015 Lausanne, Switzerland
| | | | - Elizabeth E. Powell
- Department of Gastroenterology and Hepatology, Princess Alexandra Hospital, Brisbane QLD 4102, Australia
- Faculty of Medicine, Center for Liver Disease Research, Translational Research Institute, The University of Queensland, Brisbane QLD 4102, Australia
| | - Matthew J. Sweet
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia QLD 4072, Australia
| | - Mojgan Masoodi
- Nestlé Research, Société des Produits Nestlé, CH-1015 Lausanne, Switzerland
- Institute of Clinical Chemistry, Bern University Hospital, Bern 3010, Switzerland
| | - N. Henriette Uhlenhaut
- Helmholtz Diabetes Center, Helmholtz Zentrum München, DE-85764 Neuherberg, Germany
- Metabolic Programming, Technical University of Munich School of Life Sciences, DE-85354 Freising, Germany
| | - Frédéric Gachon
- Nestlé Research, Société des Produits Nestlé, CH-1015 Lausanne, Switzerland
- Institute for Molecular Bioscience, The University of Queensland, St. Lucia QLD 4072, Australia
- School of Life Sciences, École Polytechnique Fédérale de Lausanne, CH-1015 Lausanne, Switzerland
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Shibuya Y, Hokugo A, Okawa H, Kondo T, Khalil D, Wang L, Roca Y, Clements A, Sasaki H, Berry E, Nishimura I, Jarrahy R. Therapeutic downregulation of neuronal PAS domain 2 ( Npas2) promotes surgical skin wound healing. eLife 2022; 11:e71074. [PMID: 35040776 PMCID: PMC8789286 DOI: 10.7554/elife.71074] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Accepted: 01/14/2022] [Indexed: 11/13/2022] Open
Abstract
Attempts to minimize scarring remain among the most difficult challenges facing surgeons, despite the use of optimal wound closure techniques. Previously, we reported improved healing of dermal excisional wounds in circadian clock neuronal PAS domain 2 (Npas2)-null mice. In this study, we performed high-throughput drug screening to identify a compound that downregulates Npas2 activity. The hit compound (Dwn1) suppressed circadian Npas2 expression, increased murine dermal fibroblast cell migration, and decreased collagen synthesis in vitro. Based on the in vitro results, Dwn1 was topically applied to iatrogenic full-thickness dorsal cutaneous wounds in a murine model. The Dwn1-treated dermal wounds healed faster with favorable mechanical strength and developed less granulation tissue than the controls. The expression of type I collagen, Tgfβ1, and α-smooth muscle actin was significantly decreased in Dwn1-treated wounds, suggesting that hypertrophic scarring and myofibroblast differentiation are attenuated by Dwn1 treatment. NPAS2 may represent an important target for therapeutic approaches to optimal surgical wound management.
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Affiliation(s)
- Yoichiro Shibuya
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
- Weintraub Center for Reconstructive BiotechnologyLos AngelesUnited States
- Department of Plastic and Reconstructive Surgery, Faculty of Medicine, University of TsukubaTsukubaJapan
| | - Akishige Hokugo
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
- Weintraub Center for Reconstructive BiotechnologyLos AngelesUnited States
| | - Hiroko Okawa
- Weintraub Center for Reconstructive BiotechnologyLos AngelesUnited States
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of DentistryMiyagiJapan
| | - Takeru Kondo
- Weintraub Center for Reconstructive BiotechnologyLos AngelesUnited States
- Division of Molecular and Regenerative Prosthodontics, Tohoku University Graduate School of DentistryMiyagiJapan
| | - Daniel Khalil
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
| | - Lixin Wang
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
| | - Yvonne Roca
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
| | - Adam Clements
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
| | - Hodaka Sasaki
- Weintraub Center for Reconstructive BiotechnologyLos AngelesUnited States
| | - Ella Berry
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
| | - Ichiro Nishimura
- Weintraub Center for Reconstructive BiotechnologyLos AngelesUnited States
| | - Reza Jarrahy
- Regenerative Bioengineering and Repair Laboratory, Division of Plastic and Reconstructive Surgery, Department of Surgery, David Geffen School of MedicineLos AngelesUnited States
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11
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Su H, Xue H, Gao S, Yan B, Wang R, Tan G, Xu Z, Zeng L. Effect of Rhizoma Drynariae on differential gene expression in ovariectomized rats with osteoporosis based on transcriptome sequencing. Front Endocrinol (Lausanne) 2022; 13:930912. [PMID: 35983515 PMCID: PMC9380231 DOI: 10.3389/fendo.2022.930912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Accepted: 06/30/2022] [Indexed: 11/13/2022] Open
Abstract
Osteoporosis is increasingly becoming a serious problem affecting the quality of life of the older population. Several experimental studies have shown that Chinese medicine has a definite effect on improving osteoporosis. Based on transcriptome sequencing, we analyzed the differential gene expression and mechanism of the related signaling pathways. Fifteen rats were randomly divided into an experimental group, a model group, and a sham surgery group. The rat model for menopausal osteoporosis was established using an ovariectomy method. One week after modeling, the experimental group was administered(intragastric administration)8.1 g/kg of Rhizoma drynariae, whereas the model and sham groups received 0.9% saline solution twice daily for 12 weeks. Subsequently, the rats were sacrificed, and the left femur of each group was removed for computerized tomography testing, while right femurs were used for hematoxylin and eosin staining. High-throughput RNA sequencing and functional and pathway enrichment analyses were performed. Comparing the gene expression between the experimental and model groups, 149 differential genes were identified, of which 44 were downregulated and 105 were upregulated. The criteria for statistical significance were |log2 Fold Change| > 1 and P < 0.05. Gene ontology analysis showed that the differentially expressed genes were enriched in cell component terms such as cell part and outer cell membrane part, and the genes were associated with cell process, biological regulation, metabolic processes, DNA transcription, and catalytic activity. Enrichment analysis of Kyoto Encyclopedia of Genes and Genomes pathways showed significantly enriched pathways associated with systemic lupus erythematosus, herpes simplex infection, circadian rhythm, vascular smooth muscle contraction, the AGE-RAGE signaling pathway in diabetic complications, and the TNF, Apelin, and Ras signaling pathways. Our results revealed that the Npas2, Dbp, Rt1, Arntl, Grem2, H2bc9, LOC501233, Pla2g2c, Hpgd, Pde6c, and Dner genes, and the circadian rhythm, lipid metabolism, inflammatory signaling pathway, and immune pathways may be the key targets and pathways for traditional Chinese medicine therapy of Rhizoma Drynariae in osteoporosis.
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Affiliation(s)
- Hui Su
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Haipeng Xue
- Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Shang Gao
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Binghan Yan
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Ruochong Wang
- College of traditional Chinese medicine, Beijing University of Traditional Chinese Medicine, Beijing, China
| | - Guoqing Tan
- Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
- *Correspondence: Guoqing Tan, ; Zhanwang Xu, ; Lingfeng Zeng,
| | - Zhanwang Xu
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
- Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
- *Correspondence: Guoqing Tan, ; Zhanwang Xu, ; Lingfeng Zeng,
| | - Lingfeng Zeng
- The 2nd Affiliated Hospital of Guangzhou University of Chinese Medicine, Guangzhou, China
- *Correspondence: Guoqing Tan, ; Zhanwang Xu, ; Lingfeng Zeng,
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12
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Yoshioka H, Tominaga S, Suzui M, Shinohara Y, Maeda T, Miura N. Involvement of <i>Npas2</i> and <i>Per2</i> modifications in zinc-induced acute diurnal toxicity in mice. J Toxicol Sci 2022; 47:547-553. [DOI: 10.2131/jts.47.547] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2022]
Affiliation(s)
| | - Sarah Tominaga
- Department of Neurotoxicology, Nagoya City University Graduate School of Medical Sciences
| | - Masumi Suzui
- Department of Neurotoxicology, Nagoya City University Graduate School of Medical Sciences
| | | | - Tohru Maeda
- Department of Pharmacy, Kinjo Gakuin University
| | - Nobuhiko Miura
- Department of Health Science, Yokohoma University of Pharmacy
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13
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Peng LU, Bai G, Pang Y. Roles of NPAS2 in circadian rhythm and disease. Acta Biochim Biophys Sin (Shanghai) 2021; 53:1257-1265. [PMID: 34415290 DOI: 10.1093/abbs/gmab105] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Indexed: 11/14/2022] Open
Abstract
NPAS2, a circadian rhythm gene encoding the neuronal PAS domain protein 2 (NPAS2), has received widespread attention because of its complex functions in cells and diverse roles in disease progression, especially tumorigenesis. NPAS2 binds with DNA at E-box sequences and forms heterodimers with another circadian protein, brain and muscle ARNT-like protein 1 (BMAL1). Nucleotide variations of the NPAS2 gene have been shown to influence the overall survival and risk of death of cancer patients, and differential expression of NPAS2 has been linked to patient outcomes in breast cancer, lung cancer, non-Hodgkin's lymphoma, and other diseases. Here, we review the latest advances in our understanding of NPAS2 with the aim of drawing attention to its potential clinical applications and prospects.
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Affiliation(s)
- L u Peng
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Jinan 250012, China
| | - Gaigai Bai
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Jinan 250012, China
| | - Yingxin Pang
- Department of Obstetrics and Gynecology, Qilu Hospital of Shandong University, Jinan 250012, China
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14
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Wang Q, Wei S, Li L, Bu Q, Zhou H, Su W, Liu Z, Wang M, Lu L. miR-139-5p sponged by LncRNA NEAT1 regulates liver fibrosis via targeting β-catenin/SOX9/TGF-β1 pathway. Cell Death Discov 2021; 7:243. [PMID: 34531378 PMCID: PMC8446030 DOI: 10.1038/s41420-021-00632-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2021] [Revised: 08/23/2021] [Accepted: 08/27/2021] [Indexed: 12/26/2022] Open
Abstract
Liver fibrosis is a patho-physiological process which can develop into cirrhosis, and hepatic carcinoma without intervention. Our study extensively investigated the mechanisms of lncRNA NEAT1 and miR-139-5p in regulating liver fibrosis progression. Our results demonstrated that the expression of lncRNA NEAT1 was increased and the expression of miR-139-5p was decreased in fibrotic liver tissues. LncRNA NEAT1 could sponge miR-139-5p and promoted hepatic stellate cells (HSCs) activation by directly inhibiting the expression of miR-139-5p. The co-localization of lncRNA NEAT1 with miR-139-5p was shown in the cytosols of activated HSCs. miR-139-5p upregulation could suppress the expression of β-catenin. The overexpression of β-catenin promoted HSCs activation. Moreover, we found that β-catenin could interact with SOX9 promoted HSCs activation. Our further studies demonstrated that SOX9 could bind with the TGF-β1 promoter and promoted the transcription activity of TGF-β1. The upregulation of TGF-β1 further promoted HSCs activation. In vivo study also suggested that lncRNA NEAT1 knockdown and miR-139-5p overexpression alleviated murine liver fibrosis. LncRNA NEAT1 exacerbated liver fibrosis by suppressing the expression of miR-139-5p. Collectively, our study suggested that miR-139-5p sponged by lncRNA NEAT1 regulated liver fibrosis via targeting β-catenin/SOX9/TGF-β1 Pathway.
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Affiliation(s)
- Qi Wang
- School of Medicine, Southeast University, Nanjing, China
- Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, The First Affiliated Hospital of Nanjing Medical University, Research Unit of Liver Transplantation and Transplant Immunology, Chinese Academy of Medical Sciences, Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Living Donor Liver Transplantation, Nanjing, China
| | - Song Wei
- School of Medicine, Southeast University, Nanjing, China
- Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, The First Affiliated Hospital of Nanjing Medical University, Research Unit of Liver Transplantation and Transplant Immunology, Chinese Academy of Medical Sciences, Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Living Donor Liver Transplantation, Nanjing, China
| | - Lei Li
- Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, The First Affiliated Hospital of Nanjing Medical University, Research Unit of Liver Transplantation and Transplant Immunology, Chinese Academy of Medical Sciences, Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Living Donor Liver Transplantation, Nanjing, China
| | - Qingfa Bu
- Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, The First Affiliated Hospital of Nanjing Medical University, Research Unit of Liver Transplantation and Transplant Immunology, Chinese Academy of Medical Sciences, Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Living Donor Liver Transplantation, Nanjing, China
| | - Haoming Zhou
- Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, The First Affiliated Hospital of Nanjing Medical University, Research Unit of Liver Transplantation and Transplant Immunology, Chinese Academy of Medical Sciences, Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Living Donor Liver Transplantation, Nanjing, China
| | - Wantong Su
- Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, The First Affiliated Hospital of Nanjing Medical University, Research Unit of Liver Transplantation and Transplant Immunology, Chinese Academy of Medical Sciences, Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Living Donor Liver Transplantation, Nanjing, China
| | - Zheng Liu
- Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, The First Affiliated Hospital of Nanjing Medical University, Research Unit of Liver Transplantation and Transplant Immunology, Chinese Academy of Medical Sciences, Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Living Donor Liver Transplantation, Nanjing, China
| | - Mingming Wang
- Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, The First Affiliated Hospital of Nanjing Medical University, Research Unit of Liver Transplantation and Transplant Immunology, Chinese Academy of Medical Sciences, Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Living Donor Liver Transplantation, Nanjing, China
| | - Ling Lu
- School of Medicine, Southeast University, Nanjing, China.
- Jiangsu Cancer Hospital, Jiangsu Institute of Cancer Research, Nanjing Medical University Affiliated Cancer Hospital, The First Affiliated Hospital of Nanjing Medical University, Research Unit of Liver Transplantation and Transplant Immunology, Chinese Academy of Medical Sciences, Key Laboratory of Liver Transplantation, Chinese Academy of Medical Sciences, NHC Key Laboratory of Living Donor Liver Transplantation, Nanjing, China.
- Jiangsu Key Lab of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Personalized Cancer Medicine, Nanjing Medical University, Nanjing, China.
- State Key Laboratory of Reproductive Medicine, Nanjing, China.
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15
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Dai H, Zhao N, Liu H, Zheng Y, Zhao L. LncRNA Nuclear-Enriched Abundant Transcript 1 Regulates Atrial Fibrosis via the miR-320/NPAS2 Axis in Atrial Fibrillation. Front Pharmacol 2021; 12:647124. [PMID: 34040522 PMCID: PMC8142243 DOI: 10.3389/fphar.2021.647124] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Accepted: 03/10/2021] [Indexed: 12/13/2022] Open
Abstract
Atrial fibrosis is a key contributor to atrial fibrillation (AF). Long non-coding ribonucleic acids (lncRNAs) were demonstrated to exhibit a key role in fibrotic remodeling; however, the function of nuclear-enriched abundant transcript 1 (NEAT1) in atrial fibrosis remains unclear. In the present study, we showed that NEAT1 was upregulated in atrial tissues of AF patients and was positively related to collagen I (coll I) and collagen III (coll III) expressions. Furthermore, the deletion of NEAT1 attenuated angiotensin II (Ang II)-caused atrial fibroblast proliferation, migration, and collagen production. We further observed that NEAT1 knockdown improved Ang II caused mouse atrial fibrosis in in vivo experiments. Moreover, we demonstrated that NEAT1 could negatively regulate miR-320 expression by acting as a competitive endogenous RNA (ceRNA). miR-320 directly targeted neuronal per arnt sim domain protein 2 (NPAS2) and suppressed its expression. We observed that NEAT1 exerted its function via the miR-320–NPAS2 axis in cardiac fibroblasts. These findings indicate that NEAT1 exerts a significant effect on atrial fibrosis and that this lncRNA is a new potential molecular target for AF treatment.
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Affiliation(s)
- Huangdong Dai
- Department of Cardiovascular Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Naishi Zhao
- Department of Cardiovascular Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Hua Liu
- Department of Cardiovascular Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Yue Zheng
- Department of Cardiovascular Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
| | - Liang Zhao
- Department of Cardiovascular Surgery, Shanghai Chest Hospital, Shanghai Jiao Tong University, Shanghai, China
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