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Zhang X, Hu D, Sun X, Gu Y, Zhou Y, Su C, Liu S, Zhang C, Lu G, Wu Q, Chen A. PHGDH/SYK: a hub integrating anti-fungal immunity and serine metabolism. Cell Death Differ 2024:10.1038/s41418-024-01374-7. [PMID: 39256519 DOI: 10.1038/s41418-024-01374-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 08/29/2024] [Accepted: 09/02/2024] [Indexed: 09/12/2024] Open
Abstract
Immune cells modify their metabolic pathways in response to fungal infections. Nevertheless, the biochemical underpinnings need to be better understood. This study reports that fungal infection drives a switch from glycolysis to the serine synthesis pathway (SSP) and one-carbon metabolism by inducing the interaction of spleen tyrosine kinase (SYK) and phosphoglycerate dehydrogenase (PHGDH). As a result, PHGDH promotes SYK phosphorylation, leading to the recruitment of SYK to C-type lectin receptors (CLRs). The CLR/SYK complex initiates signaling cascades that lead to transcription factor activation and pro-inflammatory cytokine production. SYK activates SSP and one-carbon metabolism by inducing PHGDH activity. Then, one-carbon metabolism supports S-adenosylmethionine and histone H3 lysine 36 trimethylation to drive the production of pro-inflammatory cytokines and chemokines. These findings reveal the crosstalk between amino acid metabolism, epigenetic modification, and CLR signaling during fungal infection.
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Affiliation(s)
- Xinyong Zhang
- Department of Neurology, The Second People's Hospital of Huai 'an, Huai 'an, 223001, China
| | - Dongdong Hu
- Department of Emergency, The Fourth Affiliated Hospital of Nanjing Medical University, Nanjing, 210031, China
| | - Xiaoyan Sun
- School of Food and Pharmacy, Zhejiang Ocean University, Zhoushan, 316022, China
| | - Yichun Gu
- The Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, and Department of Physiology, Nanjing Medical University, Nanjing, Jiangsu, 211166, China
| | - Yong Zhou
- Department of Neurology, The Second People's Hospital of Huai 'an, Huai 'an, 223001, China
| | - Chuanxin Su
- The Key Laboratory of Targeted Intervention of Clinical Disease, University Hospital Essen, University of Duisburg-Essen, Essen, 45122, Germany
| | - Shi Liu
- State Key Laboratory of Virology, Modern Virology Research Center, Frontier Science Center for Immunology and Metabolism, College of Life Sciences, Wuhan University, Wuhan, 430072, China
| | - Caiyan Zhang
- Department of Critical Care Medicine, Children's Hospital of Fudan University, Shanghai, China
| | - Guoping Lu
- Department of Critical Care Medicine, Children's Hospital of Fudan University, Shanghai, China
| | - Qiwen Wu
- Department of Laboratory Medicine, The First Affiliated Hospital of Wannan Medical College, Wuhu, 241001, China.
| | - Aidong Chen
- The Key Laboratory of Targeted Intervention of Cardiovascular Disease, Collaborative Innovation Center for Cardiovascular Disease Translational Medicine, and Department of Physiology, Nanjing Medical University, Nanjing, Jiangsu, 211166, China.
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Barbieri F, Hall IF, Elia L, Civilini E. Vascular malformation rupture in a patient affected by Costello syndrome. BMJ Case Rep 2022; 15:e250948. [PMID: 36526283 PMCID: PMC9764614 DOI: 10.1136/bcr-2022-250948] [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] [Indexed: 12/23/2022] Open
Abstract
Costello syndrome (CS) is a rare genetic syndrome affecting multiple organs, generally caused by mutations of the HRAS gene, belonging to the RAS/MAPK genes family.A male patient with CS developed a painful pulsatile mass on the lateral side of the wrist. An initial ultrasonographic investigation confirmed the presence of a radial artery lesion, possibly an arterial aneurysm. On surgical resection, histological evaluation showed a tangle of vascular structures with variable calibre and abnormal wall histology. Immunohistochemical stainings revealed a very poor endothelial contribution to the central vascular wall structure. These histological observations led us to conclude we had managed an acute vascular malformation (VM) rupture, rather than a common arterial aneurysmal condition. Considering the molecular mechanisms regulated by RAS/MAPK genes, CS patients might have a higher risk of developing VMs and, in the presence of a pulsatile mass with acute onset, VM rupture should be considered.
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Affiliation(s)
| | | | - Leonardo Elia
- Humanitas Clinical and Research Center - IRCCS, Rozzano, Milan, Italy
- DMMT, Università degli Studi di Brescia, Brescia, Italy
| | - Efrem Civilini
- Humanitas Clinical and Research Center - IRCCS, Rozzano, Milan, Italy
- Humanitas University, Rozzano, Milan, Italy
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Shih YC, Chen PY, Ko TM, Huang PH, Ma H, Tarng DC. MMP-9 Deletion Attenuates Arteriovenous Fistula Neointima through Reduced Perioperative Vascular Inflammation. Int J Mol Sci 2021; 22:ijms22115448. [PMID: 34064140 PMCID: PMC8196691 DOI: 10.3390/ijms22115448] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2021] [Revised: 05/15/2021] [Accepted: 05/18/2021] [Indexed: 01/05/2023] Open
Abstract
Matrix metalloproteinase 9 (MMP-9) expression is upregulated in vascular inflammation and participates in vascular remodeling, including aneurysm dilatation and arterial neointima development. Neointima at the arteriovenous (AV) fistula anastomosis site primarily causes AV fistula stenosis and failure; however, the effects of MMP-9 on perioperative AV fistula remodeling remain unknown. Therefore, we created AV fistulas (end-to-side anastomosis) in wild-type (WT) and MMP-9 knockout mice with chronic kidney disease to further clarify this. Neointima progressively developed in the AV fistula venous segment of WT mice during the four-week postoperative course, and MMP-9 knockout increased the lumen area and attenuated neointima size by reducing smooth muscle cell and collagen components. Early perioperative AV fistula mRNA sequencing data revealed that inflammation-related gene sets were negatively enriched in AV fistula of MMP-9 knockout mice compared to that in WT mice. qPCR results also showed that inflammatory genes, including tumor necrosis factor-α (TNF-α), monocyte chemoattractant protein-1 (MCP-1), interleukin-6 (IL-6), intercellular adhesion molecule-1 (ICAM-1), and vascular cell adhesion molecule-1 (VCAM-1), were downregulated. In addition, Western blot results showed that MMP-9 knockout reduced CD44 and RAC-alpha serine/threonine-protein kinase (Akt) and extracellular signal-regulated kinases (ERK) phosphorylation. In vitro, MMP-9 addition enhanced IL-6 and MCP-1 expression in vascular smooth muscle cells, as well as cell migration, which was reversed by an MMP-9 inhibitor. In conclusion, MMP-9 knockout attenuated AV fistula stenosis by reducing perioperative vascular inflammation.
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Affiliation(s)
- Yu-Chung Shih
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei 11217, Taiwan; (Y.-C.S.); (H.M.)
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan;
- Institute of Clinical Medicine, National Yang Ming University, Taipei 11221, Taiwan
- Department of Surgery, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
| | - Po-Yuan Chen
- Bioinformatics Program, Taiwan International Graduate Program, Academia Sinica, Taipei 115, Taiwan; (P.-Y.C.); (T.-M.K.)
- Institute of Bioinformatics and Systems Biology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
- Institute of Information Science, Academia Sinica, Taipei 115, Taiwan
| | - Tai-Ming Ko
- Bioinformatics Program, Taiwan International Graduate Program, Academia Sinica, Taipei 115, Taiwan; (P.-Y.C.); (T.-M.K.)
- Institute of Bioinformatics and Systems Biology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
- Department of Biological Science and Technology, National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
- Institute of Biomedical Sciences, Academia Sinica, Taipei 115, Taiwan
- Center of Intelligent Drug System and Smart Bio-devices (IDS2B), National Yang Ming Chiao Tung University, Hsinchu 300, Taiwan
| | - Po-Hsun Huang
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan;
- Institute of Clinical Medicine, National Yang Ming University, Taipei 11221, Taiwan
- Department of Critical Care Medicine, Taipei Veterans General Hospital, Taipei 11217, Taiwan
| | - Hsu Ma
- Division of Plastic and Reconstructive Surgery, Department of Surgery, Taipei Veterans General Hospital, Taipei 11217, Taiwan; (Y.-C.S.); (H.M.)
- Department of Surgery, School of Medicine, National Yang Ming Chiao Tung University, Taipei 112, Taiwan
- Department of Surgery, School of Medicine, National Defense Medical Center, Taipei 11490, Taiwan
| | - Der-Cherng Tarng
- Institute of Clinical Medicine, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan;
- Institute of Clinical Medicine, National Yang Ming University, Taipei 11221, Taiwan
- Division of Nephrology, Department of Medicine, Taipei Veterans General Hospital, Taipei 11217, Taiwan
- Institute of Physiology, National Yang Ming Chiao Tung University, Taipei 11221, Taiwan
- Correspondence:
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Wang Y, Xu Y, Yan S, Cao K, Zeng X, Zhou Y, Liu Z, Yang Q, Pan Y, Wang X, Boison D, Su Y, Jiang X, Patel VS, Fulton D, Weintraub NL, Huo Y. Adenosine kinase is critical for neointima formation after vascular injury by inducing aberrant DNA hypermethylation. Cardiovasc Res 2021; 117:561-575. [PMID: 32065618 PMCID: PMC7820850 DOI: 10.1093/cvr/cvaa040] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2019] [Revised: 01/20/2020] [Accepted: 02/12/2020] [Indexed: 12/21/2022] Open
Abstract
AIMS Adenosine receptors and extracellular adenosine have been demonstrated to modulate vascular smooth muscle cell (VSMC) proliferation and neointima formation. Adenosine kinase (ADK) is a major enzyme regulating intracellular adenosine levels but is function in VSMC remains unclear. Here, we investigated the role of ADK in vascular injury-induced smooth muscle proliferation and delineated the mechanisms underlying its action. METHODS AND RESULTS We found that ADK expression was higher in the neointima of injured vessels and in platelet-derived growth factor-treated VSMCs. Genetic and pharmacological inhibition of ADK was enough to attenuate arterial injury-induced neointima formation due to inhibition of VSMC proliferation. Mechanistically, using infinium methylation assays and bisulfite sequencing, we showed that ADK metabolized the intracellular adenosine and potentiated the transmethylation pathway, then induced the aberrant DNA hypermethylation. Pharmacological inhibition of aberrant DNA hypermethylation increased KLF4 expression and suppressed VSMC proliferation as well as the neointima formation. Importantly, in human femoral arteries, we observed increased ADK expression and DNA hypermethylation as well as decreased KLF4 expression in neointimal VSMCs of stenotic vessels suggesting that our findings in mice are relevant for human disease and may hold translational significance. CONCLUSION Our study unravels a novel mechanism by which ADK promotes VSMC proliferation via inducing aberrant DNA hypermethylation, thereby down-regulating KLF4 expression and promoting neointima formation. These findings advance the possibility of targeting ADK as an epigenetic modulator to combat vascular injury.
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Affiliation(s)
- Yong Wang
- College of Basic Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan, China
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Yiming Xu
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, USA
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People’s Hospital; State Key Lab of Respiratory Disease; School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Siyuan Yan
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Science, Beijing, China
| | - Kaixiang Cao
- The Sixth Affiliated Hospital of Guangzhou Medical University, Qingyuan People’s Hospital; State Key Lab of Respiratory Disease; School of Basic Medical Sciences, Guangzhou Medical University, Guangzhou, Guangdong, China
| | - Xianqiu Zeng
- Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong, China
| | - Yaqi Zhou
- Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong, China
| | - Zhiping Liu
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, USA
- Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong, China
| | - Qiuhua Yang
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, USA
- Key Laboratory of Chemical Genomics, Peking University Shenzhen Graduate School, Shenzhen, Guangdong, China
| | - Yue Pan
- Georgia Prevention Institute, Augusta University, Augusta, GA, USA
| | - Xiaoling Wang
- Georgia Prevention Institute, Augusta University, Augusta, GA, USA
| | - Detlev Boison
- Robert S. Dow Neurobiology Laboratories, Legacy Research Institute, Portland, OR, USA
| | - Yunchao Su
- Department of Pharmacology and Toxicology, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Xuejun Jiang
- State Key Laboratory of Mycology, Institute of Microbiology, Chinese Academy of Science, Beijing, China
| | - Vijay S Patel
- Department of Anesthesiology and Perioperative Medicine, Augusta University, Augusta, GA, USA
| | - David Fulton
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Neal L Weintraub
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, USA
| | - Yuqing Huo
- Vascular Biology Center, Medical College of Georgia, Augusta University, Augusta, GA, USA
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Méndez-Barbero N, Gutierrez-Muñoz C, Madrigal-Matute J, Mínguez P, Egido J, Michel JB, Martín-Ventura JL, Esteban V, Blanco-Colio LM. A major role of TWEAK/Fn14 axis as a therapeutic target for post-angioplasty restenosis. EBioMedicine 2019; 46:274-289. [PMID: 31395500 PMCID: PMC6712059 DOI: 10.1016/j.ebiom.2019.07.072] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 07/30/2019] [Accepted: 07/30/2019] [Indexed: 11/04/2022] Open
Abstract
Background Tumor necrosis factor-like weak inducer of apoptosis (Tnfsf12; TWEAK) and its receptor Fibroblast growth factor-inducible 14 (Tnfrsf12a; Fn14) participate in the inflammatory response associated with vascular remodeling. However, the functional effect of TWEAK on vascular smooth muscle cells (VSMCs) is not completely elucidated. Methods Next generation sequencing-based methods were performed to identify genes and pathways regulated by TWEAK in VSMCs. Flow-citometry, wound-healing scratch experiments and transwell migration assays were used to analyze VSMCs proliferation and migration. Mouse wire injury model was done to evaluate the role of TWEAK/Fn14 during neointimal hyperplasia. Findings TWEAK up-regulated 1611 and down-regulated 1091 genes in VSMCs. Using a gene-set enrichment method, we found a functional module involved in cell proliferation defined as the minimal network connecting top TWEAK up-regulated genes. In vitro experiments in wild-type or Tnfrsf12a deficient VSMCs demonstrated that TWEAK increased cell proliferation, VSMCs motility and migration. Mechanistically, TWEAK increased cyclins (cyclinD1), cyclin-dependent kinases (CDK4, CDK6) and decreased cyclin-dependent kinase inhibitors (p15lNK4B) mRNA and protein expression. Downregulation of p15INK4B induced by TWEAK was mediated by mitogen-activated protein kinase ERK and Akt activation. Tnfrsf12a or Tnfsf12 genetic depletion and pharmacological intervention with TWEAK blocking antibody reduced neointimal formation, decreasing cell proliferation, cyclin D1 and CDK4/6 expression, and increasing p15INK4B expression compared with wild type or IgG-treated mice in wire-injured femoral arteries. Finally, immunohistochemistry in human coronary arteries with stenosis or in-stent restenosis revealed high levels of Fn14, TWEAK and PCNA in VSMCs enriched areas of the neointima as compared with healthy coronary arteries. Interpretation Our data define a major role of TWEAK/Fn14 in the control of VSMCs proliferation and migration during neointimal hyperplasia after wire injury in mice, and identify TWEAK/Fn14 as a potential target for treating in-stent restenosis. Fund ISCiii-FEDER, CIBERCV and CIBERDEM.
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Affiliation(s)
| | | | - Julio Madrigal-Matute
- Department of Developmental and Molecular Biology, Albert Einstein College of Medicine, New York, USA
| | - Pablo Mínguez
- Department of Genetics and Genomics, IIS-Fundación Jiménez Díaz, Madrid, Spain
| | - Jesús Egido
- Renal and Diabetes Research Lab, CIBERDEM, IIS-Fundación Jiménez Díaz, Madrid, Spain
| | - Jean-Baptiste Michel
- INSERM U1148, Laboratory for Vascular Translational Science (LVTS), Paris, France
| | | | - Vanesa Esteban
- Department of Immunology and ARADyAL, IIS-Fundación Jiménez Díaz, Madrid, Spain.
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Naushad SM, Hussain T, Indumathi B, Samreen K, Alrokayan SA, Kutala VK. Machine learning algorithm-based risk prediction model of coronary artery disease. Mol Biol Rep 2018; 45:901-910. [DOI: 10.1007/s11033-018-4236-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Accepted: 07/02/2018] [Indexed: 10/26/2022]
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Daniel JM, Reich F, Dutzmann J, Weisheit S, Teske R, Gündüz D, Bauersachs J, Preissner K, Sedding D. Cleaved high-molecular-weight kininogen inhibits neointima formation following vascular injury. Thromb Haemost 2017; 114:603-13. [DOI: 10.1160/th15-01-0013] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 04/07/2015] [Indexed: 12/14/2022]
Abstract
SummaryCleaved high-molecular-weight kininogen (HKa) or its peptide domain 5 (D5) alone exert anti-adhesive properties in vitro related to impeding integrin-mediated cellular interactions. However, the anti-adhesive effects of HKa in vivo remain elusive. In this study, we investigated the effects of HKa on leukocyte recruitment and neointima formation following wire-induced injury of the femoral artery in C57BL/6 mice. Local application of HKa significantly reduced the accumulation of monocytes and also reduced neointimal lesion size 14 days after injury. Moreover, C57BL/6 mice transplanted with bone marrow from transgenic mice expressing enhanced green fluorescence protein (eGFP) showed a significantly reduced accumulation of eGFP+-cells at the arterial injury site and decreased neointimal lesion size after local application of HKa or the polypeptide D5 alone. A differentiation of accumulating eGFP+-cells into highly specific smooth muscle cells (SMC) was not detected in any group. In contrast, application of HKa significantly reduced the proliferation of locally derived neointimal cells. In vitro, HKa and D5 potently inhibited the adhesion of SMC to vitronectin, thus impairing their proliferation, migration, and survival rates. In conclusion, application of HKa or D5 decreases the inflammatory response to vascular injury and exerts direct effects on SMC by impeding the binding of integrins to extracellular matrix components. Therefore, HKa and D5 may hold promise as novel therapeutic substances to prevent neointima formation.
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Daniel JM, Dutzmann J, Brunsch H, Bauersachs J, Braun-Dullaeus R, Sedding DG. Systemic application of sirolimus prevents neointima formation not via a direct anti-proliferative effect but via its anti-inflammatory properties. Int J Cardiol 2017; 238:79-91. [DOI: 10.1016/j.ijcard.2017.03.052] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Revised: 01/06/2017] [Accepted: 03/12/2017] [Indexed: 01/15/2023]
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Daniel JM, Prock A, Dutzmann J, Sonnenschein K, Thum T, Bauersachs J, Sedding DG. Regulator of G-Protein Signaling 5 Prevents Smooth Muscle Cell Proliferation and Attenuates Neointima Formation. Arterioscler Thromb Vasc Biol 2015; 36:317-27. [PMID: 26663397 DOI: 10.1161/atvbaha.115.305974] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2015] [Accepted: 11/24/2015] [Indexed: 12/20/2022]
Abstract
OBJECTIVE Regulator of G-protein signaling 5 (RGS5) is abundantly expressed in vascular smooth muscle cells (SMCs) and inhibits G-protein signaling by enhancing the guanosine triphosphate-hydrolyzing activity of Gα-subunits. In the present study, we investigated the effects of RGS5 on vascular SMC function in vitro and neointima formation after wire-induced injury in mice and determined the underlying mechanisms. APPROACH AND RESULTS We found a robust expression of RGS5 in native arteries of C57BL/6 mice and a highly significant downregulation within neointimal lesions 10 and 21 days after vascular injury as assessed by quantitative polymerase chain reaction, immunoblotting, and immunohistochemistry. In vitro, RGS5 was found significantly downregulated after mitogenic stimulation of human coronary artery SMCs. To restore RGS5 levels, SMCs were transduced with adenoviral vectors encoding wild-type RGS5 or a nondegradable mutant. RGS5-WT and, even more prominently, the C2A-RGS5 mutant prevented SMC proliferation and migration. In contrast, the siRNA-mediated knockdown of RGS5 significantly augmented SMC proliferation. Following overexpression of RGS5, fluorescence-activated cell sorting analysis of propidium iodide-stained cells indicated cell cycle arrest in G0/G1 phase. Mechanistically, inhibition of the phosphorylation of the extracellular signal-regulated kinase 1/2 and mitogen-activated protein kinase downstream signaling was shown to be responsible for the anti-proliferative effect of RGS5. Following wire-induced injury of the femoral artery in C57BL/6 mice, adenoviral-mediated overexpression of RGS5-WT or C2A-RGS5 significantly reduced SMC proliferation and neointima formation in vivo. CONCLUSIONS Downregulation of RGS5 is an important prerequisite for SMC proliferation in vitro and in vivo. Therefore, reconstitution of RGS5 levels represents a promising therapeutic option to prevent vascular remodeling processes.
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Affiliation(s)
- Jan-Marcus Daniel
- From the Department of Cardiology and Angiology (J.-M.D., J.D., K.S., J.B., D.G.S.), REBIRTH Excellence Cluster (J.-M.D., T.T., J.B., D.G.S.), and Institute of Molecular and Translational Therapeutic Strategies (IMTTS) (K.S., T.T.), Hannover Medical School, Hannover, Germany; Department of General, Visceral, Vascular and Pediatric Surgery, University Hospital Wuerzburg, Wuerzburg, Germany (A.P.); and National Heart and Lung Institute, Imperial College London, London, UK (T.T.)
| | - André Prock
- From the Department of Cardiology and Angiology (J.-M.D., J.D., K.S., J.B., D.G.S.), REBIRTH Excellence Cluster (J.-M.D., T.T., J.B., D.G.S.), and Institute of Molecular and Translational Therapeutic Strategies (IMTTS) (K.S., T.T.), Hannover Medical School, Hannover, Germany; Department of General, Visceral, Vascular and Pediatric Surgery, University Hospital Wuerzburg, Wuerzburg, Germany (A.P.); and National Heart and Lung Institute, Imperial College London, London, UK (T.T.)
| | - Jochen Dutzmann
- From the Department of Cardiology and Angiology (J.-M.D., J.D., K.S., J.B., D.G.S.), REBIRTH Excellence Cluster (J.-M.D., T.T., J.B., D.G.S.), and Institute of Molecular and Translational Therapeutic Strategies (IMTTS) (K.S., T.T.), Hannover Medical School, Hannover, Germany; Department of General, Visceral, Vascular and Pediatric Surgery, University Hospital Wuerzburg, Wuerzburg, Germany (A.P.); and National Heart and Lung Institute, Imperial College London, London, UK (T.T.)
| | - Kristina Sonnenschein
- From the Department of Cardiology and Angiology (J.-M.D., J.D., K.S., J.B., D.G.S.), REBIRTH Excellence Cluster (J.-M.D., T.T., J.B., D.G.S.), and Institute of Molecular and Translational Therapeutic Strategies (IMTTS) (K.S., T.T.), Hannover Medical School, Hannover, Germany; Department of General, Visceral, Vascular and Pediatric Surgery, University Hospital Wuerzburg, Wuerzburg, Germany (A.P.); and National Heart and Lung Institute, Imperial College London, London, UK (T.T.)
| | - Thomas Thum
- From the Department of Cardiology and Angiology (J.-M.D., J.D., K.S., J.B., D.G.S.), REBIRTH Excellence Cluster (J.-M.D., T.T., J.B., D.G.S.), and Institute of Molecular and Translational Therapeutic Strategies (IMTTS) (K.S., T.T.), Hannover Medical School, Hannover, Germany; Department of General, Visceral, Vascular and Pediatric Surgery, University Hospital Wuerzburg, Wuerzburg, Germany (A.P.); and National Heart and Lung Institute, Imperial College London, London, UK (T.T.)
| | - Johann Bauersachs
- From the Department of Cardiology and Angiology (J.-M.D., J.D., K.S., J.B., D.G.S.), REBIRTH Excellence Cluster (J.-M.D., T.T., J.B., D.G.S.), and Institute of Molecular and Translational Therapeutic Strategies (IMTTS) (K.S., T.T.), Hannover Medical School, Hannover, Germany; Department of General, Visceral, Vascular and Pediatric Surgery, University Hospital Wuerzburg, Wuerzburg, Germany (A.P.); and National Heart and Lung Institute, Imperial College London, London, UK (T.T.)
| | - Daniel G Sedding
- From the Department of Cardiology and Angiology (J.-M.D., J.D., K.S., J.B., D.G.S.), REBIRTH Excellence Cluster (J.-M.D., T.T., J.B., D.G.S.), and Institute of Molecular and Translational Therapeutic Strategies (IMTTS) (K.S., T.T.), Hannover Medical School, Hannover, Germany; Department of General, Visceral, Vascular and Pediatric Surgery, University Hospital Wuerzburg, Wuerzburg, Germany (A.P.); and National Heart and Lung Institute, Imperial College London, London, UK (T.T.).
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Zhang G, Zhao L, Wang Y, Shao J, Cui J, Lou Y, Geng M, Zhang N, Chen YH, Liu S. TIPE2 protein prevents injury-induced restenosis in mice. Biochim Biophys Acta Mol Basis Dis 2015; 1852:1574-84. [DOI: 10.1016/j.bbadis.2015.04.018] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2014] [Revised: 04/15/2015] [Accepted: 04/16/2015] [Indexed: 11/25/2022]
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11
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Kwon H, Lee JJ, Lee JH, Cho WK, Gu MJ, Lee KJ, Ma JY. Cinnamon and its Components Suppress Vascular Smooth Muscle Cell Proliferation by Up-Regulating Cyclin-Dependent Kinase Inhibitors. THE AMERICAN JOURNAL OF CHINESE MEDICINE 2015; 43:621-36. [DOI: 10.1142/s0192415x1550038x] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Cinnamomum cassia bark has been used in traditional herbal medicine to treat a variety of cardiovascular diseases. However, the antiproliferative effect of cinnamon extract on vascular smooth muscle cells (VSMCs) and the corresponding restenosis has not been explored. Hence, after examining the effect of cinnamon extract on VSMC proliferation, we investigated the possible involvement of signal transduction pathways associated with early signal and cell cycle analysis, including regulatory proteins. Besides, to identify the active components, we investigated the components of cinnamon extract on VSMC proliferation. Cinnamon extract inhibited platelet-derived growth factor (PDGF)-BB-induced VSMC proliferation and suppressed the PDGF-stimulated early signal transduction. In addition, cinnamon extract arrested the cell cycle and inhibited positive regulatory proteins. Correspondingly, the protein levels of p21 and p27 not only were increased in the presence of cinnamon extract, also the expression of proliferating cell nuclear antigen (PCNA) was inhibited by cinnamon extract. Besides, among the components of cinnamon extract, cinnamic acid (CA), eugenol (EG) and cinnamyl alcohol significantly inhibited the VSMC proliferation. Overall, the present study demonstrates that cinnamon extract inhibited the PDGF-BB-induced proliferation of VSMCs through a G0/G1 arrest, which down-regulated the expression of cell cycle positive regulatory proteins by up-regulating p21 and p27 expression.
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Affiliation(s)
- Hyeeun Kwon
- Korean Medicine (KM) Application Center, Korea Institute of Oriental Medicine, Daejeon 305-811, Republic of Korea
| | - Jung-Jin Lee
- Korean Medicine (KM) Application Center, Korea Institute of Oriental Medicine, Daejeon 305-811, Republic of Korea
| | - Ji-Hye Lee
- Korean Medicine (KM) Application Center, Korea Institute of Oriental Medicine, Daejeon 305-811, Republic of Korea
| | - Won-Kyung Cho
- Korean Medicine (KM) Application Center, Korea Institute of Oriental Medicine, Daejeon 305-811, Republic of Korea
| | - Min Jung Gu
- Korean Medicine (KM) Application Center, Korea Institute of Oriental Medicine, Daejeon 305-811, Republic of Korea
| | - Kwang Jin Lee
- Korean Medicine (KM) Application Center, Korea Institute of Oriental Medicine, Daejeon 305-811, Republic of Korea
| | - Jin Yeul Ma
- Korean Medicine (KM) Application Center, Korea Institute of Oriental Medicine, Daejeon 305-811, Republic of Korea
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12
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Hu X, Wang Z, Wu H, Jiang W, Hu R. Ras ssDNA aptamer inhibits vascular smooth muscle cell proliferation and migration through MAPK and PI3K pathways. Int J Mol Med 2015; 35:1355-61. [PMID: 25778421 DOI: 10.3892/ijmm.2015.2139] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2014] [Accepted: 02/25/2015] [Indexed: 11/05/2022] Open
Abstract
Proliferation and migration of vascular smooth muscle cells (VSMCs) mediated by Ras proteins are crucial in restenosis following percutaneous coronary intervention (PCI) and coronary artery bypass graft (CABG). In this study, a novel, single-stranded DNA (ssDNA) aptamer designated as Ras-a1 with high affinity and specificity to human Ras protein was isolated using systematic evolution of ligands by exponential enrichment. Ras-a1 was delivered into VSMCs by electroporation using one square waveform of 200 V for 20 msec. Proliferation of VSMCs was determined using a cell counting kit‑8 assay, which revealed the maximal inhibitory rate (40%) was obtained at 24 h after Ras-a1 transfection. The migration of VSMCs, determined using a Transwell assay, was significantly inhibited in Rasa1 cells in a time-dependent manner. To investigate the potential mechanisms of transfected Ras-a1 on the migration and proliferation of VSMCs, the phosphorylation of MEK1/2, ERK1/2, and Akt was determined using western blot analysis, which showed that a marked downregulation was observed in the phosphorylation of MEK1/2, ERK1/2, and Akt following the delivery of Ras-a1. This result demonstrated that Ras-a1 inhibits the proliferation and migration of VSMCs by inhibiting the phosphorylation of Ras and interrupting signal transduction in the Ras‑MEK1/2‑ERK1/2 and phosphoinositide-3 kinase/Akt pathways. The novel Ras protein-targeted ssDNA aptamer selected may be applicable for the prevention of restenosis after PCI and CABG.
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Affiliation(s)
- Xiaoping Hu
- Department of Cardiovascular Surgery, Wuhan University Renmin Hospital, Wuhan, Hubei 430060, P.R. China
| | - Zhiwei Wang
- Department of Cardiovascular Surgery, Wuhan University Renmin Hospital, Wuhan, Hubei 430060, P.R. China
| | - Hongbing Wu
- Department of Cardiovascular Surgery, Wuhan University Renmin Hospital, Wuhan, Hubei 430060, P.R. China
| | - Wanli Jiang
- Department of Cardiovascular Surgery, Wuhan University Renmin Hospital, Wuhan, Hubei 430060, P.R. China
| | - Rui Hu
- Department of Cardiovascular Surgery, Wuhan University Renmin Hospital, Wuhan, Hubei 430060, P.R. China
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13
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Daniel JM, Penzkofer D, Teske R, Dutzmann J, Koch A, Bielenberg W, Bonauer A, Boon RA, Fischer A, Bauersachs J, van Rooij E, Dimmeler S, Sedding DG. Inhibition of miR-92a improves re-endothelialization and prevents neointima formation following vascular injury. Cardiovasc Res 2014; 103:564-72. [PMID: 25020912 PMCID: PMC4145012 DOI: 10.1093/cvr/cvu162] [Citation(s) in RCA: 104] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
Aims MicroRNA (miR)-92a is an important regulator of endothelial proliferation and angiogenesis after ischaemia, but the effects of miR-92a on re-endothelialization and neointimal lesion formation after vascular injury remain elusive. We tested the effects of lowering miR-92a levels using specific locked nucleic acid (LNA)-based antimiRs as well as endothelial-specific knock out of miR-92a on re-endothelialization and neointimal formation after wire-induced injury of the femoral artery in mice. Methods and results MiR-92a was significantly up-regulated in neointimal lesions following wire-induced injury. Pre-miR-92a overexpression resulted in repression of the direct miR-92a target genes integrin α5 and sirtuin1, and reduced eNOS expression in vitro. MiR-92a impaired proliferation and migration of endothelial cells but not smooth muscle cells. In vivo, systemic inhibition of miR-92a expression with LNA-modified antisense molecules resulted in a significant acceleration of re-endothelialization of the denuded vessel area. Genetic deletion of miR-92a in Tie2-expressing cells, representing mainly endothelial cells, enhanced re-endothelialization, whereas no phenotype was observed in mice lacking miR-92a expression in haematopoietic cells. The enhanced endothelial recovery was associated with reduced accumulation of leucocytes and inhibition of neointimal formation 21 days after injury and led to the de-repression of the miR-92a targets integrin α5 and sirtuin1. Conclusion Our data indicate that inhibition of endothelial miR-92a attenuates neointimal lesion formation by accelerating re-endothelialization and thus represents a putative novel mechanism to enhance the functional recovery following vascular injury.
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Affiliation(s)
- Jan-Marcus Daniel
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg-Strasse 1, Hannover D-30625, Germany Department of Cardiology, University Hospital Giessen & Marburg, Giessen, Germany
| | - Daniela Penzkofer
- Institute for Cardiovascular Regeneration, Centre of Molecular Medicine, Goethe University, Frankfurt, Germany
| | - Rebecca Teske
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg-Strasse 1, Hannover D-30625, Germany Department of Cardiology, University Hospital Giessen & Marburg, Giessen, Germany
| | - Jochen Dutzmann
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg-Strasse 1, Hannover D-30625, Germany
| | - Alexander Koch
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg-Strasse 1, Hannover D-30625, Germany Department of Cardiology, University Hospital Giessen & Marburg, Giessen, Germany
| | - Wiebke Bielenberg
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg-Strasse 1, Hannover D-30625, Germany Department of Cardiology, University Hospital Giessen & Marburg, Giessen, Germany
| | - Angelika Bonauer
- Institute for Cardiovascular Regeneration, Centre of Molecular Medicine, Goethe University, Frankfurt, Germany
| | - Reinier A Boon
- Institute for Cardiovascular Regeneration, Centre of Molecular Medicine, Goethe University, Frankfurt, Germany
| | - Ariane Fischer
- Institute for Cardiovascular Regeneration, Centre of Molecular Medicine, Goethe University, Frankfurt, Germany
| | - Johann Bauersachs
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg-Strasse 1, Hannover D-30625, Germany
| | | | - Stefanie Dimmeler
- Institute for Cardiovascular Regeneration, Centre of Molecular Medicine, Goethe University, Frankfurt, Germany
| | - Daniel G Sedding
- Department of Cardiology and Angiology, Hannover Medical School, Carl-Neuberg-Strasse 1, Hannover D-30625, Germany Department of Cardiology, University Hospital Giessen & Marburg, Giessen, Germany
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Overexpression of S-adenosylhomocysteine hydrolase (SAHH) in esophageal squamous cell carcinoma (ESCC) cell lines: effects on apoptosis, migration and adhesion of cells. Mol Biol Rep 2014; 41:2409-17. [DOI: 10.1007/s11033-014-3095-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2013] [Accepted: 01/04/2014] [Indexed: 01/02/2023]
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15
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Loirand G, Sauzeau V, Pacaud P. Small G Proteins in the Cardiovascular System: Physiological and Pathological Aspects. Physiol Rev 2013; 93:1659-720. [DOI: 10.1152/physrev.00021.2012] [Citation(s) in RCA: 78] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
Small G proteins exist in eukaryotes from yeast to human and constitute the Ras superfamily comprising more than 100 members. This superfamily is structurally classified into five families: the Ras, Rho, Rab, Arf, and Ran families that control a wide variety of cell and biological functions through highly coordinated regulation processes. Increasing evidence has accumulated to identify small G proteins and their regulators as key players of the cardiovascular physiology that control a large panel of cardiac (heart rhythm, contraction, hypertrophy) and vascular functions (angiogenesis, vascular permeability, vasoconstriction). Indeed, basal Ras protein activity is required for homeostatic functions in physiological conditions, but sustained overactivation of Ras proteins or spatiotemporal dysregulation of Ras signaling pathways has pathological consequences in the cardiovascular system. The primary object of this review is to provide a comprehensive overview of the current progress in our understanding of the role of small G proteins and their regulators in cardiovascular physiology and pathologies.
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Affiliation(s)
- Gervaise Loirand
- INSERM, UMR S1087; University of Nantes; and CHU Nantes, l'Institut du Thorax, Nantes, France
| | - Vincent Sauzeau
- INSERM, UMR S1087; University of Nantes; and CHU Nantes, l'Institut du Thorax, Nantes, France
| | - Pierre Pacaud
- INSERM, UMR S1087; University of Nantes; and CHU Nantes, l'Institut du Thorax, Nantes, France
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Zhang G, Zhang W, Lou Y, Xi W, Cui J, Geng M, Zhu F, Chen YH, Liu S. TIPE2 deficiency accelerates neointima formation by downregulating smooth muscle cell differentiation. Cell Cycle 2013; 12:501-10. [PMID: 23324338 PMCID: PMC3587451 DOI: 10.4161/cc.23325] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Phenotypic switching of vascular smooth muscle cells (VSMCs) is known to play a key role in the development of atherosclerosis. However, the mechanisms that mediate VSMC phenotypic switching are unclear. We report here that TIPE2, the tumor necrosis factor (TNF) α-induced protein 8-like 2 (TNFAIP8L2), plays an atheroprotective role by regulating phenotypic switching of VSMCs in response to oxidized low-density lipoprotein (ox-LDL) stimuli. TIPE2-deficient VSMCs treated with ox-LDL expressed lower levels of contractile proteins such as SMαA, SM-MHC and calponin, whereas the proliferation, migration and the synthetic capacity for growth factors and cytokines were increased remarkably. Furthermore, TIPE2 inhibited VSMCs proliferation by preventing G 1/S phase transition. Interestingly, these effects of TIPE2 on VSMCs were dependent on P38 and ERK1/2 kinase signals. As a result, neointima formation was accelerated in the carotid arteries of TIPE2-deficient mice. These results indicate that TIPE2 is a potential inhibitor of atherosclerosis.
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Affiliation(s)
- Guizhong Zhang
- Institute of Immunology; Shandong University School of Medicine; Ji’nan, China
| | - Wenqian Zhang
- Institute of Immunology; Shandong University School of Medicine; Ji’nan, China
| | - Yunwei Lou
- Institute of Immunology; Shandong University School of Medicine; Ji’nan, China
| | - Wenjin Xi
- Department of Immunology; Fourth Military Medical University; Xi’an, China
| | - Jian Cui
- Institute of Immunology; Shandong University School of Medicine; Ji’nan, China
| | - Minghong Geng
- Institute of Immunology; Shandong University School of Medicine; Ji’nan, China
| | - Faliang Zhu
- Institute of Immunology; Shandong University School of Medicine; Ji’nan, China
| | - Youhai H. Chen
- Department of Pathology and Laboratory Medicine; University of Pennsylvania; Philadelphia, PA USA
| | - Suxia Liu
- Institute of Immunology; Shandong University School of Medicine; Ji’nan, China
- Key Laboratory of Cardiovascular Remodeling and Function Research; Chinese Ministry of Education and Chinese Ministry of Health; Shandong University Qilu Hospital; Jinan, China
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Won KJ, Jung SH, Lee CK, Na HR, Lee KP, Lee DY, Park ES, Choi WS, Shim SB, Kim B. DJ-1/park7 protects against neointimal formation via the inhibition of vascular smooth muscle cell growth. Cardiovasc Res 2012; 97:553-61. [PMID: 23230227 DOI: 10.1093/cvr/cvs363] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/21/2023] Open
Abstract
AIMS DJ-1/park7 is a ubiquitously expressed multifunctional protein that plays essential roles in a variety of cells. However, its function in the vascular system has not been determined. We investigated the protective roles of DJ-1/park7 in vascular disorders, especially in neointimal hyperplasia. METHODS AND RESULTS DJ-1/park7 was strongly expressed in the neointimal layer, in which its oxidized form was predominant. Treatment of vascular smooth muscle cells (VSMCs) from the mouse aorta with H(2)O(2) increased the oxidation of DJ-1/park7 visualized on two-dimensional electrophoresis gels. The growth of VSMCs in FBS-containing media and the release of H(2)O(2) were significantly increased in DJ-1/park7(-/-) knockout mice compared with DJ-1/park7(+/+) wild-type mice. The expression of cyclin D1 and the phosphorylation of extracellular signal-regulated kinase (ERK) 1/2 were greater in VSMCs from the DJ-1/park7(-/-) aorta than from the DJ-1/park7(+/+) aorta. Both of these measures were inhibited by treatment with an ERK1/2 inhibitor or antioxidants and in DJ-1/park7-overexpressing cells. VSMC proliferation, cyclin D1 expression, and ERK1/2 phosphorylation in response to platelet-derived growth factor-BB were upregulated in DJ-1/park7(-/-) compared with DJ-1/park7(+/+) mice. VSMCs of DJ-1/park7(-/-) mice exhibited higher levels of sprout outgrowth of aortic strips and neointimal plaque formation elicited by carotid artery ligation compared with those of DJ-1/park7(+/+) mice. CONCLUSION These results indicate that DJ-1/park7 is involved in the growth of VSMCs, thereby inhibiting neointimal hyperplasia, and suggest that it might play protective roles in vascular remodelling.
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Affiliation(s)
- Kyung Jong Won
- Department of Medicine, Institute of Functional Genomics, School of Medicine, Konkuk University, 322 Danwol-dong, Chungju 380-701, Korea
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Interference of IP-10 expression inhibits vascular smooth muscle cell proliferation and intimal hyperplasia in carotid artery: a new insight in the prevention of restenosis. Cell Biochem Biophys 2012; 62:125-35. [PMID: 21850543 DOI: 10.1007/s12013-011-9270-9] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
Abstract
After vascular angioplasty, vascular smooth muscle cell (VSMC) proliferation causes atherosclerosis and intimal hyperplasia leading to restenosis. Interferon-γ-inducible protein (IP)-10 plays a role in atherogenesis, but the mechanism remains unclear. We evaluated the role of IP-10 in intimal hyperplasia and restenosis. IP-10 expression was determined in arterial specimens from 20 arteriosclerotic obliteration patients and 6 healthy individuals. VSMCs were stimulated in vitro with IFN-γ and transfected with IP-10 siRNA. Silencing was verified with RT-PCR/Western blot; cell proliferation rate was detected by methyl-thiazol-tetrazolium. The carotid artery model of atherosclerosis injury was established with IP-10 siRNA. IP-10 expression was detected at 1 and 4 weeks using RT-PCR and immunohistochemistry. Artery morphology was assessed with hematoxylin-and-eosin staining, and intimal hyperplasia was evaluated by electron microscopy. IP-10 was overexpressed in arteriosclerotic obliteration group compared with control group (P < 0.05). IP-10 expression in transfected group was significantly lower than in untransfected group. The intima-to-media ratio of transfected group at 4 weeks was lower than that of untransfected group (P < 0.01). The transfected group exhibited more regular intimal structure and less hyperplasia under electron microscopy. We, therefore, concluded that IP-10 played an important role in intimal hyperplasia as siRNA-mediated IP-10 silencing inhibited aberrant VSMCs hyperplasia and reduced restenosis.
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Daniel JM, Dutzmann J, Bielenberg W, Widmer-Teske R, Gündüz D, Hamm CW, Sedding DG. Inhibition of STAT3 signaling prevents vascular smooth muscle cell proliferation and neointima formation. Basic Res Cardiol 2012; 107:261. [PMID: 22418922 PMCID: PMC3350628 DOI: 10.1007/s00395-012-0261-9] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/15/2010] [Revised: 02/22/2012] [Accepted: 03/07/2012] [Indexed: 12/11/2022]
Abstract
Dedifferentiation, migration, and proliferation of resident vascular smooth muscle cells (SMCs) are key components of neointima formation after vascular injury. Activation of signal transducer and activator of transcription-3 (STAT3) is suggested to be critically involved in this process, but the complex regulation of STAT3-dependent genes and the functional significance of inhibiting this pathway during the development of vascular proliferative diseases remain elusive. In this study, we demonstrate that STAT3 was activated in neointimal lesions following wire-induced injury in mice. Phosphorylation of STAT3 induced trans-activation of cyclin D1 and survivin in SMCs in vitro and in neointimal cells in vivo, thus promoting proliferation and migration of SMCs as well as reducing apoptotic cell death. WP1066, a highly potent inhibitor of STAT3 signaling, abrogated phosphorylation of STAT3 and dose-dependently inhibited the functional effects of activated STAT3 in stimulated SMCs. The local application of WP1066 via a thermosensitive pluronic F-127 gel around the dilated arteries significantly inhibited proliferation of neointimal cells and decreased the neointimal lesion size at 3 weeks after injury. Even though WP1066 application attenuated the injury-induced up-regulation of the chemokine RANTES at 6 h after injury, there was no significant effect on the accumulation of circulating cells at 1 week after injury. In conclusion, these data identify STAT3 as a key molecule for the proliferative response of SMC and neointima formation. Moreover, inhibition of STAT3 by the potent and specific compound WP1066 might represent a novel and attractive approach for the local treatment of vascular proliferative diseases.
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Affiliation(s)
- Jan-Marcus Daniel
- Department of Cardiology, Justus-Liebig-University, Giessen, Germany
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Wang Z, Yao T, Song Z. Involvement and mechanism of DGAT2 upregulation in the pathogenesis of alcoholic fatty liver disease. J Lipid Res 2010; 51:3158-65. [PMID: 20739640 DOI: 10.1194/jlr.m007948] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The mechanisms involved in the development of alcoholic liver disease (ALD) are not well established. We investigated the involvement of acyl-CoA: diacylglycerol acyltransferase 2 (DGAT2) upregulation in mediating hepatic fat accumulation induced by chronic alcohol consumption. Chronic alcohol feeding caused fatty liver and increased hepatic DGAT2 gene and protein expression, concomitant with a significant suppression of hepatic MAPK/ERK kinase/extracellular regulated kinase 1/2 (MEK/ERK1/2) activation. In vitro studies demonstrated that specific inhibitors of the MEK/ERK1/2 pathway increased DGAT2 gene expression and triglyceride (TG) contents in HepG2 cells, whereas epidermal growth factor, a strong ERK1/2 activator, had the opposite effect. Moreover, chronic alcohol feeding decreased hepatic S-adenosylmethionine (SAM): S-adenosylhomocysteine (SAH) ratio, an indicator of disrupted transmethylation reactions. Mechanistic investigations revealed that N-acetyl-S-farnesyl-L-cysteine, a potent inhibitor of isoprenylcysteine carboxyl methyltransferase, suppressed ERK1/2 activation, followed by an enhanced DGAT2 expression and an elevated TG content in HepG2 cells. Lastly, we demonstrated that the beneficial effects of betaine supplementation in ALD were associated with improved SAM/SAH ratio, alleviated ERK1/2 inhibition, and attenuated DGAT2 upregulation. In conclusion, our data suggest that upregulation of DGAT2 plays an important role in the pathogenesis of ALD, and that abnormal methionine metabolism contributes, at least partially, to DGAT2 upregulation via suppression of MEK/ERK1/2 activation.
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Affiliation(s)
- Zhigang Wang
- Department of Kinesiology and Nutrition, University of Illinois at Chicago, Chicago, IL 60612, USA
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Ramos KS. H-RAS controls phenotypic profiles of vascular smooth muscle cells and the pathogenesis of vascular proliferative disorders. Circ Res 2009; 104:1139-41. [PMID: 19461105 DOI: 10.1161/circresaha.109.199554] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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