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Pan J, Zhang L, Li D, Li Y, Lu M, Hu Y, Sun B, Zhang Z, Li C. Hypoxia-inducible factor-1: Regulatory mechanisms and drug therapy in myocardial infarction. Eur J Pharmacol 2024; 963:176277. [PMID: 38123007 DOI: 10.1016/j.ejphar.2023.176277] [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: 09/03/2023] [Revised: 11/30/2023] [Accepted: 12/13/2023] [Indexed: 12/23/2023]
Abstract
Myocardial infarction (MI), an acute cardiovascular disease characterized by coronary artery blockage, inadequate blood supply, and subsequent ischemic necrosis of the myocardium, is one of the leading causes of death. The cellular, physiological, and pathological responses following MI are complex, involving multiple intertwined pathological mechanisms. Hypoxia-inducible factor-1 (HIF-1), a crucial regulator of hypoxia, plays a significant role in of the development of MI by modulating the behavior of various cells such as cardiomyocytes, endothelial cells, macrophages, and fibroblasts under hypoxic conditions. HIF-1 regulates various post-MI adaptive reactions to acute ischemia and hypoxia through various mechanisms. These mechanisms include angiogenesis, energy metabolism, oxidative stress, inflammatory response, and ventricular remodeling. With its crucial role in MI, HIF-1 is expected to significantly influence the treatment of MI. However, the drugs available for the treatment of MI targeting HIF-1 are currently limited, and most contain natural compounds. The development of precision-targeted drugs modulating HIF-1 has therapeutic potential for advancing MI treatment research and development. This study aimed to summarize the regulatory role of HIF-1 in the pathological responses of various cells following MI, the diverse mechanisms of action of HIF-1 in MI, and the potential drugs targeting HIF-1 for treating MI, thus providing the theoretical foundations for potential clinical therapeutic targets.
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Affiliation(s)
- Jinyuan Pan
- Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Lei Zhang
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Dongxiao Li
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Yuan Li
- Experimental Center, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Mengkai Lu
- Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Yuanlong Hu
- College of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Bowen Sun
- Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Zhiyuan Zhang
- Innovation Research Institute of Traditional Chinese Medicine, Shandong University of Traditional Chinese Medicine, Jinan, 250355, China
| | - Chao Li
- Qingdao Traditional Chinese Medicine Hospital (Qingdao Hiser Hospital), Qingdao, 266000, China.
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2
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Huang B, Chen N, Chen Z, Shen J, Zhang H, Wang C, Sun Y. HIF-1α Contributes to Hypoxia-induced VSMC Proliferation and Migration by Regulating Autophagy in Type A Aortic Dissection. Adv Biol (Weinh) 2024; 8:e2300292. [PMID: 37786269 DOI: 10.1002/adbi.202300292] [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: 07/06/2023] [Revised: 08/19/2023] [Indexed: 10/04/2023]
Abstract
Type A aortic dissection (AD) is a catastrophic cardiovascular disease. Hypoxia-inducible factor-1α (HIF-1α) and autophagy are reported to be upregulated in the AD specimens. However, the interaction between HIF-1α and autophagy in the pathogenesis of AD remains to be explored. HIF-1α and LC3 levels are evaluated in 10 AD and 10 normal aortic specimens. MDC staining, autophagic vacuoles, and autophagic flux are detected in human aortic smooth muscle cells (HASMCs) under hypoxia treatment. CCK-8, transwell, and wound healing assay are used to identify proliferation and migration under hypoxia treatment. Furthermore, 3-MA is used to inhibit autophagy in hypoxia-treated HASMCs. This study reveals that AD tissues highly express HIF-1α and the LC3. Autophagy is induced under hypoxia in a time-dependent manner, and autophagy is positively related to HIF-1α in HASMCs. Moreover, the proliferation and migration of HASMCs are enhanced by hypoxia, whereas the knockdown of HIF-1α attenuates this effect. Additionally, inhibiting autophagy with 3-MA ameliorates hypoxia-induced proliferation and migration of HASMCs. In summary, the above results indicate that HIF-1α facilitates HASMC proliferation and migration by upregulating autophagy in a hypoxic microenvironment. Thus, inhibition of autophagy may be a novel therapeutic target for the prevention and treatment of AD.
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Affiliation(s)
- Ben Huang
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China
| | - Nan Chen
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China
| | - Zhenhang Chen
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China
| | - Jinqiang Shen
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China
| | - Hao Zhang
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China
| | - Chunsheng Wang
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China
| | - Yongxin Sun
- Department of Cardiac Surgery, Zhongshan Hospital, Fudan University, Shanghai, 200032, P.R. China
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3
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Li S, Gao Z, Li H, Xu C, Chen B, Zha Q, Yang K, Wang W. Hif-1α/Slit2 Mediates Vascular Smooth Muscle Cell Phenotypic Changes in Restenosis of Bypass Grafts. J Cardiovasc Transl Res 2023; 16:1021-1031. [PMID: 37097589 PMCID: PMC10615989 DOI: 10.1007/s12265-023-10384-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/29/2022] [Accepted: 03/24/2023] [Indexed: 04/26/2023]
Abstract
Vascular smooth muscle cells (VSMCs) are involved in restenosis of bypass grafts and cause artery graft occlusion. This study aimed to explore the role of Slit2 in phenotypic switching of VSMCs and its effect on restenosis of vascular conduits. An animal model of vascular graft restenosis (VGR) was produced in SD rats and assessed by echocardiography. The expression of Slit2 and Hif-1α was measured in vivo and in vitro. After Slit2 overexpression, the migration and proliferation of VSMCs were detected in vitro, and the restenosis rates and phenotype of VSMCs were tested in vivo. The arteries of the VGR model presented significant stenosis, and Slit2 was decreased in VSMCs of the VGR model. In vitro, Slit2 overexpression inhibited the migration and proliferation of VSMCs, but Slit2 knockdown promoted migration and proliferation. Hypoxia induced Hif-1α but reduced Slit2, and Hif-1α negatively regulated Slit2 expression. Moreover, Slit2 overexpression weakened the rate of VGR and maintained the patency of artery bypass grafts, which suppressed the phenotypic switching of VSMCs. Slit2 inhibited the synthetic phenotype transformation to inhibit the migration and proliferation of VSMCs and delayed the VGR via Hif-1α.
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Affiliation(s)
- Sen Li
- Department of Vascular Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, China
| | - Zhiwei Gao
- Department of Vascular Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, China
| | - Haiqing Li
- Department of Cardiovascular Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200025, China
| | - Chang Xu
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, China
| | - Bing Chen
- Department of Vascular Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, China
| | - Qing Zha
- Department of Cardiology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China.
| | - Ke Yang
- Department of Cardiovascular Medicine, Ruijin Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200025, China.
| | - Weilin Wang
- Department of Hepatobiliary and Pancreatic Surgery, The Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, China.
- Department of Cardiology, Shanghai Ninth People's Hospital, Shanghai Jiaotong University School of Medicine, Shanghai, 200011, China.
- Key Laboratory of Precision Diagnosis and Treatment for Hepatobiliary and Pancreatic Tumor of Zhejiang Province, Hangzhou, Zhejiang, 310009, China.
- Research Center of Diagnosis and Treatment Technology for Hepatocellular Carcinoma of Zhejiang Province, Hangzhou, Zhejiang, 310009, China.
- Clinical Medicine Innovation Center of Precision Diagnosis and Treatment for Hepatobiliary and Pancreatic Disease of Zhejiang University, Hangzhou, Zhejiang, 310009, China.
- Clinical Research Center of Hepatobiliary and Pancreatic Diseases of Zhejiang Province, Hangzhou, Zhejiang, 310009, China.
- Cancer Center, Zhejiang University, Hangzhou, Zhejiang, 310009, China.
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4
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Pervaiz N, Kathuria I, Aithabathula RV, Singla B. Matricellular proteins in atherosclerosis development. Matrix Biol 2023; 120:1-23. [PMID: 37086928 PMCID: PMC10225360 DOI: 10.1016/j.matbio.2023.04.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2022] [Revised: 04/18/2023] [Accepted: 04/19/2023] [Indexed: 04/24/2023]
Abstract
The extracellular matrix (ECM) is an intricate network composed of various multi-domain macromolecules like collagen, proteoglycans, and fibronectin, etc., that form a structurally stable composite, contributing to the mechanical properties of tissue. However, matricellular proteins are non-structural, secretory extracellular matrix proteins, which modulate various cellular functions via interacting with cell surface receptors, proteases, hormones, and cell-matrix. They play essential roles in maintaining tissue homeostasis by regulating cell differentiation, proliferation, adhesion, migration, and several signal transduction pathways. Matricellular proteins display a broad functionality regulated by their multiple structural domains and their ability to interact with different extracellular substrates and/or cell surface receptors. The expression of these proteins is low in adults, however, gets upregulated following injuries, inflammation, and during tumor growth. The marked elevation in the expression of these proteins during atherosclerosis suggests a positive association between their expression and atherosclerotic lesion formation. The role of matricellular proteins in atherosclerosis development has remained an area of research interest in the last two decades and studies revealed these proteins as important players in governing vascular function, remodeling, and plaque formation. Despite extensive research, many aspects of the matrix protein biology in atherosclerosis are still unknown and future studies are required to investigate whether targeting pathways stimulated by these proteins represent viable therapeutic approaches for patients with atherosclerotic vascular diseases. This review summarizes the characteristics of distinct matricellular proteins, discusses the available literature on the involvement of matrix proteins in the pathogenesis of atherosclerosis and suggests new avenues for future research.
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Affiliation(s)
- Naveed Pervaiz
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, USA
| | - Ishita Kathuria
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, USA
| | - Ravi Varma Aithabathula
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, USA
| | - Bhupesh Singla
- Department of Pharmaceutical Sciences, College of Pharmacy, The University of Tennessee Health Science Center, USA.
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5
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Chou YH, Pan SY, Lin SL. Pleotropic effects of hypoxia-inducible factor-prolyl hydroxylase domain inhibitors: are they clinically relevant? Kidney Res Clin Pract 2023; 42:27-38. [PMID: 36634968 PMCID: PMC9902737 DOI: 10.23876/j.krcp.22.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Accepted: 06/30/2022] [Indexed: 11/22/2022] Open
Abstract
Anemia is common in patients with chronic kidney disease (CKD) and is mainly caused by insufficient production of erythropoietin from fibrotic kidney. Because anemia impairs quality of life and overall prognosis, recombinant human erythropoietin-related products (erythropoiesis-stimulating agents, ESAs) have been developed to increase hemoglobin level for decades. However, many safety concerns have been announced regarding the use of ESAs, including an increased occurrence of cardiovascular events, vascular access thrombosis, cancer progression, and recurrence. Hypoxia-inducible factor (HIF) is crucial to erythropoietin production, as a result, prolyl hydroxylase domain (PHD) enzyme inhibitors have been new therapeutic agents for the treatment of anemia in CKD. They can be administered orally, which is a preferred route for patients not undergoing hemodialysis. In clinical trials, PHD inhibitor could induce noninferior effect on erythropoiesis and improve functional iron deficiency compared with ESAs. Although no serious adverse events were reported, safety is still a concern because HIF stabilization induced by PHD inhibitor has pleotropic effects, such as angiogenesis, metabolic change, and cell survival, which might lead to unwanted deleterious effects, including fibrosis, inflammation, cardiovascular risk, and tumor growth. More molecular mechanisms of PHD inhibition and long-term clinical trials are needed to observe these pleotropic effects for the confirmation of safety and efficacy of PHD inhibitors.
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Affiliation(s)
- Yu-Hsiang Chou
- Renal Division, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan
| | - Szu-Yu Pan
- Renal Division, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan,Department of Integrated Diagnostics and Therapeutics, National Taiwan University Hospital, Taipei, Taiwan
| | - Shuei-Liong Lin
- Renal Division, Department of Internal Medicine, National Taiwan University Hospital, Taipei, Taiwan,Department of Integrated Diagnostics and Therapeutics, National Taiwan University Hospital, Taipei, Taiwan,Graduate Institute of Physiology, National Taiwan University School of Medicine, Taipei, Taiwan,Research Center for Developmental Biology and Regenerative Medicine, National Taiwan University, Taipei, Taiwan,Correspondence: Shuei-Liong Lin Graduate Institute of Physiology, National Taiwan University School of Medicine, No. 1, Jen-Ai Road Section 1, Taipei, 100, Taiwan. E-mail:
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6
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Tang Y, Zhou X, Cao T, Chen E, Li Y, Lei W, Hu Y, He B, Liu S. Endoplasmic Reticulum Stress and Oxidative Stress in Inflammatory Diseases. DNA Cell Biol 2022; 41:924-934. [DOI: 10.1089/dna.2022.0353] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Yun Tang
- Department of Clinical Laboratory Medicine, Institution of Microbiology and Infectious Diseases, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Xiangping Zhou
- Department of Clinical Laboratory Medicine, Institution of Microbiology and Infectious Diseases, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Ting Cao
- Department of Clinical Laboratory Medicine, Institution of Microbiology and Infectious Diseases, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - En Chen
- Department of Clinical Laboratory Medicine, Institution of Microbiology and Infectious Diseases, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Yumeng Li
- Department of Clinical Laboratory Medicine, Institution of Microbiology and Infectious Diseases, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Wenbo Lei
- Department of Clinical Laboratory Medicine, Institution of Microbiology and Infectious Diseases, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Yibao Hu
- Department of Clinical Laboratory Medicine, Institution of Microbiology and Infectious Diseases, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Bisha He
- Department of Clinical Laboratory Medicine, Institution of Microbiology and Infectious Diseases, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, China
| | - Shuangquan Liu
- Department of Clinical Laboratory Medicine, Institution of Microbiology and Infectious Diseases, The First Affiliated Hospital, Hengyang Medical School, University of South China, Hengyang, Hunan, China
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7
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Thomas C, Leleu D, Masson D. Cholesterol and HIF-1α: Dangerous Liaisons in Atherosclerosis. Front Immunol 2022; 13:868958. [PMID: 35386720 PMCID: PMC8977597 DOI: 10.3389/fimmu.2022.868958] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Accepted: 02/28/2022] [Indexed: 12/17/2022] Open
Abstract
HIF-1α exerts both detrimental and beneficial actions in atherosclerosis. While there is evidence that HIF-1α could be pro-atherogenic within the atheromatous plaque, experimental models of atherosclerosis suggest a more complex role that depends on the cell type expressing HIF-1α. In atheroma plaques, HIF-1α is stabilized by local hypoxic conditions and by the lipid microenvironment. Macrophage exposure to oxidized LDLs (oxLDLs) or to necrotic plaque debris enriched with oxysterols induces HIF-1α -dependent pathways. Moreover, HIF-1α is involved in many oxLDL-induced effects in macrophages including inflammatory response, angiogenesis and metabolic reprogramming. OxLDLs activate toll-like receptor signaling pathways to promote HIF-1α stabilization. OxLDLs and oxysterols also induce NADPH oxidases and reactive oxygen species production, which subsequently leads to HIF-1α stabilization. Finally, recent investigations revealed that the activation of liver X receptor, an oxysterol nuclear receptor, results in an increase in HIF-1α transcriptional activity. Reciprocally, HIF-1α signaling promotes triglycerides and cholesterol accumulation in macrophages. Hypoxia and HIF-1α increase the uptake of oxLDLs, promote cholesterol and triglyceride synthesis and decrease cholesterol efflux. In conclusion, the impact of HIF-1α on cholesterol homeostasis within macrophages and the feedback activation of the inflammatory response by oxysterols via HIF-1α could play a deleterious role in atherosclerosis. In this context, studies aimed at understanding the specific mechanisms leading to HIF-1α activation within the plaque represents a promising field for research investigations and a path toward development of novel therapies.
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Affiliation(s)
- Charles Thomas
- Univ. Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.,INSERM, LNC UMR1231, Dijon, France.,LipSTIC LabEx, Dijon, France
| | - Damien Leleu
- Univ. Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.,INSERM, LNC UMR1231, Dijon, France.,LipSTIC LabEx, Dijon, France.,CHRU Dijon Bourgogne, Laboratory of Clinical Chemistry, Dijon, France
| | - David Masson
- Univ. Bourgogne Franche-Comté, LNC UMR1231, Dijon, France.,INSERM, LNC UMR1231, Dijon, France.,LipSTIC LabEx, Dijon, France.,CHRU Dijon Bourgogne, Laboratory of Clinical Chemistry, Dijon, France
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8
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Knutson AK, Williams AL, Boisvert WA, Shohet RV. HIF in the heart: development, metabolism, ischemia, and atherosclerosis. J Clin Invest 2021; 131:137557. [PMID: 34623330 DOI: 10.1172/jci137557] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The heart forms early in development and delivers oxygenated blood to the rest of the embryo. After birth, the heart requires kilograms of ATP each day to support contractility for the circulation. Cardiac metabolism is omnivorous, utilizing multiple substrates and metabolic pathways to produce this energy. Cardiac development, metabolic tuning, and the response to ischemia are all regulated in part by the hypoxia-inducible factors (HIFs), central components of essential signaling pathways that respond to hypoxia. Here we review the actions of HIF1, HIF2, and HIF3 in the heart, from their roles in development and metabolism to their activity in regeneration and preconditioning strategies. We also discuss recent work on the role of HIFs in atherosclerosis, the precipitating cause of myocardial ischemia and the leading cause of death in the developed world.
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9
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Schussler O, Chachques JC, Alifano M, Lecarpentier Y. Key Roles of RGD-Recognizing Integrins During Cardiac Development, on Cardiac Cells, and After Myocardial Infarction. J Cardiovasc Transl Res 2021; 15:179-203. [PMID: 34342855 DOI: 10.1007/s12265-021-10154-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 07/02/2021] [Indexed: 12/12/2022]
Abstract
Cardiac cells interact with the extracellular matrix (ECM) proteins through integrin mechanoreceptors that control many cellular events such as cell survival, apoptosis, differentiation, migration, and proliferation. Integrins play a crucial role in cardiac development as well as in cardiac fibrosis and hypertrophy. Integrins recognize oligopeptides present on ECM proteins and are involved in three main types of interaction, namely with collagen, laminin, and the oligopeptide RGD (Arg-Gly-Asp) present on vitronectin and fibronectin proteins. To date, the specific role of integrins recognizing the RGD has not been addressed. In this review, we examine their role during cardiac development, their role on cardiac cells, and their upregulation during pathological processes such as heart fibrosis and hypertrophy. We also examine their role in regenerative and angiogenic processes after myocardial infarction (MI) in the peri-infarct area. Specific targeting of these integrins may be a way of controlling some of these pathological events and thereby improving medical outcomes.
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Affiliation(s)
- Olivier Schussler
- Thoracic Surgery Department, Cochin Hospital, APHP Centre, University of Paris, Paris, France.
| | - Juan C Chachques
- Department of Cardiac Surgery Pompidou Hospital, Laboratory of Biosurgical Research, Carpentier Foundation, University Paris Descartes, 75015, Paris, France
| | - Marco Alifano
- Thoracic Surgery Department, Cochin Hospital, APHP Centre, University of Paris, Paris, France.,INSERM U1138 Team "Cancer, Immune Control, and Escape", Cordeliers Research Center, University of Paris, Paris, France
| | - Yves Lecarpentier
- Centre de Recherche Clinique, Grand Hôpital de l'Est Francilien, Meaux, France
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10
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Lu YB, Shi C, Yang B, Lu ZF, Wu YL, Zhang RY, He X, Li LM, Hu B, Hu YW, Zheng L, Wang Q. Long noncoding RNA ZNF800 suppresses proliferation and migration of vascular smooth muscle cells by upregulating PTEN and inhibiting AKT/mTOR/HIF-1α signaling. Atherosclerosis 2020; 312:43-53. [PMID: 32971395 DOI: 10.1016/j.atherosclerosis.2020.09.007] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 06/19/2020] [Accepted: 09/08/2020] [Indexed: 01/31/2023]
Abstract
BACKGROUND AND AIMS Long noncoding RNAs (lncRNAs) have recently been implicated in many biological and disease processes, but the exact mechanism of their involvement in atherosclerosis is unclear. The aberrant proliferation and migration of vascular smooth muscle cells (VSMCs) is a major contributor to the development of atherosclerotic lesions. This study aimed to investigate the potential effects of lncRNA ZNF800, a previously uncharacterized lncRNA, on VSMC proliferation and migration. METHODS The expression of lncRNA ZNF800 in atherosclerotic plaque tissues was detected using reverse transcription-quantitative PCR (RT-qPCR), while the role and mechanism of lncRNA ZNF800 in proliferation and migration of VSMCs were investigated by CCK8 assay, transwell assay, scratch wound assay, RT-qPCR and Western blot. RESULTS We found that lncRNA ZNF800 was significantly more abundant in atherosclerotic plaque tissues, and substantially suppressed the proliferation and migration of VSMCs. LncRNA ZNF800 had no effect on phosphatase and tensin homolog deleted on chromosome 10 (PTEN) mRNA expression but dramatically increased the levels of PTEN protein. Enhanced lncRNA ZNF800 expression inhibited the activity of the AKT/mTOR/HIF-1α signaling pathway, downregulated the expression of vascular endothelial growth factor α (VEGF-α) and matrix metalloproteinase 1 (MMP1), and suppressed VSMC proliferation and migration. These inhibitory effects of lncRNA ZNF800 were abolished by knockdown of PTEN. The inhibitory effects of lncRNA ZNF800 on cell proliferation and migration and the expression of VEGF-α and MMP1 were exacerbated by HIF-1α knockdown in VSMCs. CONCLUSIONS These findings demonstrated that lncRNA ZNF800 suppressed VSMC proliferation and migration by interacting with PTEN through a mechanism involving AKT/mTOR/HIF-1α signaling. Therefore, it may play a key atheroprotective role and represent a potential therapeutic target for atherosclerosis-related diseases.
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Affiliation(s)
- Yuan-Bin Lu
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Chao Shi
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Biao Yang
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Zhi-Feng Lu
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Yi-Lin Wu
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Ru-Yi Zhang
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Xin He
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Li-Min Li
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Bing Hu
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China
| | - Yan-Wei Hu
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China; Department of Clinical Laboratory, Guangzhou Women and Children's Medical Center, Guangzhou, Guangdong, China.
| | - Lei Zheng
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
| | - Qian Wang
- Laboratory Medicine Center, Nanfang Hospital, Southern Medical University, Guangzhou, Guangdong, China.
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Duan FM, Fu LJ, Wang YH, Adu-Gyamfi EA, Ruan LL, Xu ZW, Xiao SQ, Chen XM, Wang YX, Liu TH, Ding YB. THBS1 regulates trophoblast fusion through a CD36-dependent inhibition of cAMP, and its upregulation participates in preeclampsia. Genes Dis 2020; 8:353-363. [PMID: 33997182 PMCID: PMC8093648 DOI: 10.1016/j.gendis.2020.05.007] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2019] [Revised: 05/11/2020] [Accepted: 05/29/2020] [Indexed: 02/06/2023] Open
Abstract
Preeclampsia is a pregnancy complication which threatens the survival of mothers and fetuses. It originates from abnormal placentation, especially insufficient fusion of the cytotrophoblast cells to form the syncytiotrophoblast. In this study, we found that THBS1, a matricellular protein that mediates cell-to-cell and cell-to-matrix interactions, is downregulated during the fusion of primary cytotrophoblast and BeWo cells, but upregulated in the placenta of pregnancies complicated by preeclampsia. Also, THBS1 was observed to interact with CD36, a membrane signal receptor and activator of the cAMP signaling pathway, to regulate the fusion of cytotrophoblast cells. Overexpression of THBS1 inhibited the cAMP signaling pathway and reduced the BeWo cells fusion ratio, while the effects of THBS1 were abolished by a CD36-blocking antibody. Our results suggest that THBS1 signals through a CD36-mediated cAMP pathway to regulate syncytialization of the cytotrophoblast cells, and that its upregulation impairs placental formation to cause preeclampsia. Thus, THBS1 can serve as a therapeutic target regarding the mitigation of abnormal syncytialization and preeclampsia.
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Affiliation(s)
- Fu-Mei Duan
- School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, PR China
| | - Li-Juan Fu
- Department of Herbal Medicine, School of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016, PR China
| | - Yong-Heng Wang
- The Joint International Research Laboratory of Reproduction and Development, Ministry of Education, Chongqing, 400016, PR China
| | - Enoch Appiah Adu-Gyamfi
- The Joint International Research Laboratory of Reproduction and Development, Ministry of Education, Chongqing, 400016, PR China
| | - Ling-Ling Ruan
- Department of Herbal Medicine, School of Traditional Chinese Medicine, Chongqing Medical University, Chongqing, 400016, PR China
| | - Zeng-Wei Xu
- School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, PR China
| | - Shi-Quan Xiao
- The Joint International Research Laboratory of Reproduction and Development, Ministry of Education, Chongqing, 400016, PR China.,Department of Reproductive Medicine, The Third Affiliated Hospital, Chongqing Medical University, Chongqing, 401120, PR China
| | - Xue-Mei Chen
- School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, PR China.,The Joint International Research Laboratory of Reproduction and Development, Ministry of Education, Chongqing, 400016, PR China
| | - Ying-Xiong Wang
- School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, PR China.,The Joint International Research Laboratory of Reproduction and Development, Ministry of Education, Chongqing, 400016, PR China
| | - Tai-Hang Liu
- Department of Bioinformatics, The School of Basic Medicine, Chongqing Medical University, Chongqing, 400016, PR China.,The Joint International Research Laboratory of Reproduction and Development, Ministry of Education, Chongqing, 400016, PR China
| | - Yu-Bin Ding
- School of Public Health and Management, Chongqing Medical University, Chongqing, 400016, PR China.,The Joint International Research Laboratory of Reproduction and Development, Ministry of Education, Chongqing, 400016, PR China
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12
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Sun Y, Zhao J, Chi B, Wang K. Long noncoding RNA SNHG12 promotes vascular smooth muscle cell proliferation and migration via regulating miR‐199a‐5p/HIF‐1α. Cell Biol Int 2020; 44:1714-1726. [PMID: 32339345 DOI: 10.1002/cbin.11365] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 04/09/2020] [Accepted: 04/25/2020] [Indexed: 12/18/2022]
Affiliation(s)
- Yao Sun
- Department of Vascular SurgeryThe First Affiliated Hospital of Jiamusi University Jiamusi Heilongjiang China
| | - Jin‐Tao Zhao
- Department of Second GastroenterologyThe First Affiliated Hospital of Jiamusi University Jiamusi Heilongjiang China
| | - Bao‐Jin Chi
- Department of UrologyThe First Affiliated Hospital of Jiamusi University Jiamusi Heilongjiang China
| | - Kai‐feng Wang
- Department of Vascular SurgeryThe First Affiliated Hospital of Jiamusi University Jiamusi Heilongjiang China
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13
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Strickland J, Garrison D, Copple BL. Hypoxia upregulates Cxcl12 in hepatocytes by a complex mechanism involving hypoxia-inducible factors and transforming growth factor-β. Cytokine 2020; 127:154986. [PMID: 31951966 PMCID: PMC7255688 DOI: 10.1016/j.cyto.2020.154986] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 12/26/2019] [Accepted: 01/03/2020] [Indexed: 02/08/2023]
Abstract
INTRODUCTION Cxcl12, or stromal-derived factor-1, is a chemokine produced by several hepatic cell types, including hepatocytes, after liver injury and surgical resection. Studies have revealed that Cxcl12 is important for regeneration of the liver after surgical resection and for development of liver fibrosis during chronic liver injury. While the function of Cxcl12 in the liver is well established, the mechanism by which Cxcl12 is upregulated is not fully understood. Because regions of hypoxia develop in the liver following injury, we tested the hypothesis that hypoxia upregulates Cxcl12 in hepatocytes by a hypoxia-inducible factor (HIF)-dependent mechanism. METHODS To test this hypothesis, primary mouse hepatocytes were isolated from the livers of HIF-1α-deficient mice or HIF-1β-deficient mice and exposed to 1% oxygen. Cxcl12 expression was increased following exposure of primary mouse hepatocytes to 1% oxygen. Previously we have shown, that in addition to HIFs, transforming growth factor-β is required for upregulation of a subset of genes in hypoxic hepatocytes. To examine the role of TGF-β in regulation of Cxcl12 during hypoxia, hepatocytes were pretreated with the TGF-β receptor I inhibitor, SB431542. RESULTS Upregulation of Cxcl12 by hypoxia was partially prevented in hepatocytes from HIF-1α-deficient mice and completely prevented in hepatocytes from HIF-1β-deficient hepatocytes. This suggests that under hypoxic conditions, both HIF-1α and HIF-2α regulate Cxcl12 in hepatocytes. Pretreatment of hepatocytes with SB431542 completely prevented upregulation Cxcl12 by hypoxia. Further, treatment of hepatocytes with recombinant TGF-β1 upregulated Cxcl12 in hepatocytes cultured in room air. CONCLUSION Collectively, these studies demonstrate that hypoxia upregulates Cxcl12 in primary mouse hepatocytes by a mechanism that involves HIFs and TGF-β.
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Affiliation(s)
- Jenna Strickland
- Department of Pharmacology and Toxicology and the Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, United States
| | - Domonique Garrison
- Department of Pharmacology and Toxicology and the Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, United States
| | - Bryan L Copple
- Department of Pharmacology and Toxicology and the Institute for Integrative Toxicology, Michigan State University, East Lansing, MI, United States.
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14
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Zhang K, Li M, Yin L, Fu G, Liu Z. Role of thrombospondin‑1 and thrombospondin‑2 in cardiovascular diseases (Review). Int J Mol Med 2020; 45:1275-1293. [PMID: 32323748 PMCID: PMC7138268 DOI: 10.3892/ijmm.2020.4507] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2019] [Accepted: 01/22/2020] [Indexed: 12/13/2022] Open
Abstract
Thrombospondin (TSP)-1 and TSP-2 are matricellular proteins in the extracellular matrix (ECM), which serve a significant role in the pathological processes of various cardiovascular diseases (CVDs). The multiple effects of TSP-1 and TSP-2 are due to their ability to interact with various ligands, such as structural components of the ECM, cytokines, cellular receptors, growth factors, proteases and other stromal cell proteins. TSP-1 and TSP-2 regulate the structure and activity of the aforementioned ligands by interacting directly or indirectly with them, thereby regulating the activity of different types of cells in response to environmental stimuli. The pathological processes of numerous CVDs are associated with the degradation and remodeling of ECM components, and with cell migration, dysfunction and apoptosis, which may be regulated by TSP-1 and TSP-2 through different mechanisms. Therefore, investigating the role of TSP-1 and TSP-2 in different CVDs and the potential signaling pathways they are associated with may provide a new perspective on potential therapies for the treatment of CVDs. In the present review, the current understanding of the roles TSP-1 and TSP-2 serve in various CVDs were summarized. In addition, the interacting ligands and the potential pathways associated with these thrombospondins in CVDs are also discussed.
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Affiliation(s)
- Kaijie Zhang
- Department of Vascular Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310009, P.R. China
| | - Miaomiao Li
- Department of Vascular Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310009, P.R. China
| | - Li Yin
- Department of Vascular Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310009, P.R. China
| | - Guosheng Fu
- Department of Cardiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310016, P.R. China
| | - Zhenjie Liu
- Department of Vascular Surgery, The Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310009, P.R. China
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15
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Shan F, Huang Z, Xiong R, Huang Q, Li J. HIF1α‐induced upregulation of KLF4 promotes migration of human vascular smooth muscle cells under hypoxia. J Cell Physiol 2019; 235:141-150. [PMID: 31270801 DOI: 10.1002/jcp.28953] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Accepted: 05/20/2019] [Indexed: 12/19/2022]
Affiliation(s)
- Fabo Shan
- Molecular Biology Center, State Key Laboratory of Trauma, Burn and Combined Injury Research Institute of Surgery, Daping Hospital, Army Medical University Chongqing P.R. China
| | - Zhizhong Huang
- Molecular Biology Center, State Key Laboratory of Trauma, Burn and Combined Injury Research Institute of Surgery, Daping Hospital, Army Medical University Chongqing P.R. China
| | - Renping Xiong
- Molecular Biology Center, State Key Laboratory of Trauma, Burn and Combined Injury Research Institute of Surgery, Daping Hospital, Army Medical University Chongqing P.R. China
| | - Qing‐Yuan Huang
- Department of Cold Environmental Medicine College of High Altitude Military Medicine, Army Medical University Chongqing P.R. China
| | - Junxia Li
- State Key Laboratory of Trauma, Burns and Combined Injury, Second Department of Research Institute of Surgery Daping Hospital, Army Medical University Chongqing P.R. China
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16
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Park C, Park J, Shim MK, Rhyu MR, Yoon BK, Kim KS, Lee Y. Indazole-Cl inhibits hypoxia-induced cyclooxygenase-2 expression in vascular smooth muscle cells. J Mol Endocrinol 2019; 63:27-38. [PMID: 31075756 DOI: 10.1530/jme-19-0018] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 04/18/2019] [Indexed: 12/22/2022]
Abstract
Atherosclerosis is the most common root cause of arterial disease, such as coronary artery disease and carotid artery disease. Hypoxia is associated with the formation of macrophages and increased inflammation and is known to be present in lesions of atherosclerotic. Vascular smooth muscle cells (VSMCs) are one of the major components of blood vessels, and hypoxic conditions affect VSMC inflammation, proliferation and migration, which contribute to vascular stenosis and play a major role in the atherosclerotic process. Estrogen receptor (ER)-β is thought to play an important role in preventing the inflammatory response in VSMCs. In this report, we studied the anti-inflammatory effect of indazole (In)-Cl, an ERβ-specific agonist, under conditions of hypoxia. Expression of cyclooxygenase-2 reduced by hypoxia was inhibited by In-Cl treatment in VSMCs, and this effect was antagonized by an anti-estrogen compound. Additionally, the production of reactive oxygen species induced under conditions of hypoxia was reduced by treatment with In-Cl. Increased cell migration and invasion by hypoxia were also dramatically decreased following treatment with In-Cl. The increase in cell proliferation following treatment with platelet-derived growth factor was attenuated by In-Cl in VSMCs. RNA sequencing analysis was performed to identify changes in inflammation-related genes following In-Cl treatment in the hypoxic state. Our results suggest that ERβ is a potential therapeutic target for the suppression of hypoxia-induced inflammation in VSMCs.
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Affiliation(s)
- Choa Park
- Department of Integrative Bioscience and Biotechnology, College of Life Science, Sejong University, Seoul, Korea
| | - Joonwoo Park
- Department of Integrative Bioscience and Biotechnology, College of Life Science, Sejong University, Seoul, Korea
| | - Myeong Kuk Shim
- Department of Integrative Bioscience and Biotechnology, College of Life Science, Sejong University, Seoul, Korea
| | - Mee-Ra Rhyu
- Division of Functional Food Research, Korea Food Research Institute, Jeollabuk-do, Korea
| | - Byung-Koo Yoon
- Department of Obstetrics, Gynecology and Women's Health, Samsung Medical Center, Sungkyunkwan University School of Medicine, Seoul, Korea
| | - Kyung Sook Kim
- Department of Biomedical Engineering, College of Medicine, Kyung Hee University, Seoul, Korea
| | - YoungJoo Lee
- Department of Integrative Bioscience and Biotechnology, College of Life Science, Sejong University, Seoul, Korea
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17
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Daubon T, Léon C, Clarke K, Andrique L, Salabert L, Darbo E, Pineau R, Guérit S, Maitre M, Dedieu S, Jeanne A, Bailly S, Feige JJ, Miletic H, Rossi M, Bello L, Falciani F, Bjerkvig R, Bikfalvi A. Deciphering the complex role of thrombospondin-1 in glioblastoma development. Nat Commun 2019; 10:1146. [PMID: 30850588 PMCID: PMC6408502 DOI: 10.1038/s41467-019-08480-y] [Citation(s) in RCA: 122] [Impact Index Per Article: 24.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2017] [Accepted: 01/09/2019] [Indexed: 12/17/2022] Open
Abstract
We undertook a systematic study focused on the matricellular protein Thrombospondin-1 (THBS1) to uncover molecular mechanisms underlying the role of THBS1 in glioblastoma (GBM) development. THBS1 was found to be increased with glioma grades. Mechanistically, we show that the TGFβ canonical pathway transcriptionally regulates THBS1, through SMAD3 binding to the THBS1 gene promoter. THBS1 silencing inhibits tumour cell invasion and growth, alone and in combination with anti-angiogenic therapy. Specific inhibition of the THBS1/CD47 interaction using an antagonist peptide decreases cell invasion. This is confirmed by CD47 knock-down experiments. RNA sequencing of patient-derived xenograft tissue from laser capture micro-dissected peripheral and central tumour areas demonstrates that THBS1 is one of the gene with the highest connectivity at the tumour borders. All in all, these data show that TGFβ1 induces THBS1 expression via Smad3 which contributes to the invasive behaviour during GBM expansion. Furthermore, tumour cell-bound CD47 is implicated in this process. Thrombospondin-1 (THSB1) is a component of the ECM with a role in regulating cancer development and tumour vasculature. Here, the authors show that TGF-beta-induced THBS1 expression contributes to the invasive behaviour of GBM cells and promotes resistance to antiangiogenic therapy partially through interaction with CD47.
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Affiliation(s)
- Thomas Daubon
- INSERM U1029, Institut Nationale de la Santé et de la Recherche Médicale, 33615, Pessac, France. .,University Bordeaux, 33615, Pessac, France. .,KG Jebsen Brain Tumor Research Center, University of Bergen, 5020, Bergen, Norway. .,Norlux Beuro-Oncology, Department of Biomedicine, University of Bergen, 5020, Bergen, Norway.
| | - Céline Léon
- INSERM U1029, Institut Nationale de la Santé et de la Recherche Médicale, 33615, Pessac, France.,University Bordeaux, 33615, Pessac, France
| | - Kim Clarke
- Computational Biology Facility, University of Liverpool, Liverpool, L69 7ZB, UK
| | - Laetitia Andrique
- INSERM U1029, Institut Nationale de la Santé et de la Recherche Médicale, 33615, Pessac, France.,University Bordeaux, 33615, Pessac, France
| | - Laura Salabert
- INSERM U1029, Institut Nationale de la Santé et de la Recherche Médicale, 33615, Pessac, France.,University Bordeaux, 33615, Pessac, France
| | - Elodie Darbo
- UMR1218 ACTION, Bioinformatic Center CBiB, University of Bordeaux, 33076, Bordeaux, France
| | - Raphael Pineau
- Animal Facility, University Bordeaux, 33615, Pessac, France
| | - Sylvaine Guérit
- INSERM U1029, Institut Nationale de la Santé et de la Recherche Médicale, 33615, Pessac, France.,University Bordeaux, 33615, Pessac, France
| | - Marlène Maitre
- INSERM U1215, Neurocenter Magendie, Pathophysiology of Addiction Group, 33076, Bordeaux, France
| | | | - Albin Jeanne
- CNRS UMR 7369, MEDyC, 51687, Reims, France.,SATT Nord, 59800, Lille, France
| | | | | | - Hrvoje Miletic
- KG Jebsen Brain Tumor Research Center, University of Bergen, 5020, Bergen, Norway.,Department of Pathology, Haukeland University Hospital, 5020, Bergen, Norway
| | - Marco Rossi
- Neurosurgical Oncology Unit, Department of Oncology and Hemato-Oncology, Humanitas Research Hospital, Universita Degli Studi di Milano, 20089, Rozzano, Milan, Italy
| | - Lorenzo Bello
- Neurosurgical Oncology Unit, Department of Oncology and Hemato-Oncology, Humanitas Research Hospital, Universita Degli Studi di Milano, 20089, Rozzano, Milan, Italy
| | - Francesco Falciani
- Computational Biology Facility, University of Liverpool, Liverpool, L69 7ZB, UK
| | - Rolf Bjerkvig
- KG Jebsen Brain Tumor Research Center, University of Bergen, 5020, Bergen, Norway.,Norlux Beuro-Oncology, Department of Biomedicine, University of Bergen, 5020, Bergen, Norway.,Oncology Department, Luxembourg Institute of Health, 84, Val Fleuri, 1526, Luxembourg
| | - Andréas Bikfalvi
- INSERM U1029, Institut Nationale de la Santé et de la Recherche Médicale, 33615, Pessac, France. .,University Bordeaux, 33615, Pessac, France.
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18
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Borton AH, Benson BL, Neilson LE, Saunders A, Alaiti MA, Huang AY, Jain MK, Proweller A, Ramirez-Bergeron DL. Aryl Hydrocarbon Receptor Nuclear Translocator in Vascular Smooth Muscle Cells Is Required for Optimal Peripheral Perfusion Recovery. J Am Heart Assoc 2018; 7:e009205. [PMID: 29858371 PMCID: PMC6015385 DOI: 10.1161/jaha.118.009205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/20/2018] [Accepted: 05/02/2018] [Indexed: 11/23/2022]
Abstract
BACKGROUND Limb ischemia resulting from peripheral vascular disease is a common cause of morbidity. Vessel occlusion limits blood flow, creating a hypoxic environment that damages distal tissue, requiring therapeutic revascularization. Hypoxia-inducible factors (HIFs) are key transcriptional regulators of hypoxic vascular responses, including angiogenesis and arteriogenesis. Despite vascular smooth muscle cells' (VSMCs') importance in vessel integrity, little is known about their functional responses to hypoxia in peripheral vascular disease. This study investigated the role of VSMC HIF in mediating peripheral ischemic responses. METHODS AND RESULTS We used ArntSMKO mice with smooth muscle-specific deletion of aryl hydrocarbon receptor nuclear translocator (ARNT, HIF-1β), required for HIF transcriptional activity, in a femoral artery ligation model of peripheral vascular disease. ArntSMKO mice exhibit impaired perfusion recovery despite normal collateral vessel dilation and angiogenic capillary responses. Decreased blood flow manifests in extensive tissue damage and hypoxia in ligated limbs of ArntSMKO mice. Furthermore, loss of aryl hydrocarbon receptor nuclear translocator changes the proliferation, migration, and transcriptional profile of cultured VSMCs. ArntSMKO mice display disrupted VSMC morphologic features and wrapping around arterioles and increased vascular permeability linked to decreased local blood flow. CONCLUSIONS Our data demonstrate that traditional vascular remodeling responses are insufficient to provide robust peripheral tissue reperfusion in ArntSMKO mice. In all, this study highlights HIF responses to hypoxia in arteriole VSMCs critical for the phenotypic and functional stability of vessels that aid in the recovery of blood flow in ischemic peripheral tissues.
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MESH Headings
- Animals
- Aryl Hydrocarbon Receptor Nuclear Translocator/biosynthesis
- Aryl Hydrocarbon Receptor Nuclear Translocator/genetics
- Blotting, Western
- Cells, Cultured
- Disease Models, Animal
- Gene Expression Regulation
- Immunohistochemistry
- Ischemia/genetics
- Ischemia/metabolism
- Ischemia/pathology
- Lower Extremity/blood supply
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Microscopy, Confocal
- Muscle, Smooth, Vascular/metabolism
- Muscle, Smooth, Vascular/pathology
- Peripheral Vascular Diseases/genetics
- Peripheral Vascular Diseases/metabolism
- Peripheral Vascular Diseases/pathology
- RNA/genetics
- Reverse Transcriptase Polymerase Chain Reaction
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Affiliation(s)
- Anna Henry Borton
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH
- Case Cardiovascular Research Institute, Case Western Reserve University School of Medicine, Cleveland, OH
- Harrington Heart and Vascular Institute, University Hospitals, Cleveland, OH
| | - Bryan L Benson
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH
| | - Lee E Neilson
- Neurological Institute, University Hospitals, Cleveland, OH
| | - Ashley Saunders
- Case Cardiovascular Research Institute, Case Western Reserve University School of Medicine, Cleveland, OH
- Harrington Heart and Vascular Institute, University Hospitals, Cleveland, OH
| | - M Amer Alaiti
- Case Cardiovascular Research Institute, Case Western Reserve University School of Medicine, Cleveland, OH
- Harrington Heart and Vascular Institute, University Hospitals, Cleveland, OH
| | - Alex Y Huang
- Department of Pathology, Case Western Reserve University School of Medicine, Cleveland, OH
- Division of Pediatric Hematology-Oncology, Department of Pediatrics, Case Western Reserve University School of Medicine, Cleveland, OH
- Case Comprehensive Cancer Center, Case Western Reserve University School of Medicine, Cleveland, OH
- Angie Fowler Adolescent and Young Adult Cancer Institute and University Hospitals Rainbow Babies and Children's Hospital University Hospitals, Cleveland, OH
| | - Mukesh K Jain
- Case Cardiovascular Research Institute, Case Western Reserve University School of Medicine, Cleveland, OH
- Harrington Heart and Vascular Institute, University Hospitals, Cleveland, OH
| | - Aaron Proweller
- Case Cardiovascular Research Institute, Case Western Reserve University School of Medicine, Cleveland, OH
- Harrington Heart and Vascular Institute, University Hospitals, Cleveland, OH
| | - Diana L Ramirez-Bergeron
- Case Cardiovascular Research Institute, Case Western Reserve University School of Medicine, Cleveland, OH
- Harrington Heart and Vascular Institute, University Hospitals, Cleveland, OH
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19
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Lin CY, He JY, Zeng CW, Loo MR, Chang WY, Zhang PH, Tsai HJ. microRNA-206 modulates an Rtn4a/Cxcr4a/Thbs3a axis in newly forming somites to maintain and stabilize the somite boundary formation of zebrafish embryos. Open Biol 2018; 7:rsob.170009. [PMID: 28701377 PMCID: PMC5541343 DOI: 10.1098/rsob.170009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2017] [Accepted: 06/12/2017] [Indexed: 12/22/2022] Open
Abstract
Although microRNA-206 (miR-206) is known to regulate proliferation and differentiation of muscle fibroblasts, the role of miR-206 in early-stage somite development is still unknown. During somitogenesis of zebrafish embryos, reticulon4a (rtn4a) is specifically repressed by miR-206. The somite boundary was defective, and actin filaments were crossing over the boundary in either miR-206-knockdown or rtn4a-overexpressed embryos. In these treated embryos, C-X-C motif chemokine receptor 4a (cxcr4a) was reduced, while thrombospondin 3a (thbs3a) was increased. The defective boundary was phenocopied in either cxcr4a-knockdown or thbs3a-overexpressed embryos. Repression of thbs3a expression by cxcr4a reduced the occurrence of the boundary defect. We demonstrated that cxcr4a is an upstream regulator of thbs3a and that defective boundary cells could not process epithelialization in the absence of intracellular accumulation of the phosphorylated focal adhesion kinase (p-FAK) in boundary cells. Therefore, in the newly forming somites, miR-206-mediated downregulation of rtn4a increases cxcr4a. This activity largely decreases thbs3a expression in the epithelial cells of the somite boundary, which causes epithelialization of boundary cells through mesenchymal-epithelial transition (MET) and eventually leads to somite boundary formation. Collectively, we suggest that miR-206 mediates a novel pathway, the Rtn4a/Cxcr4a/Thbs3a axis, that allows boundary cells to undergo MET and form somite boundaries in the newly forming somites of zebrafish embryos.
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Affiliation(s)
- Cheng-Yung Lin
- Institute of Biomedical Sciences, Mackay Medical College, No. 46, Section 3 Zhongzhen Road, Sanzhi Dist., New Taipei City 252, Taiwan, Republic of China
| | - Jun-Yu He
- Institute of Molecular and Cellular Biology, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 106, Taiwan, Republic of China
| | - Chih-Wei Zeng
- Institute of Molecular and Cellular Biology, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 106, Taiwan, Republic of China
| | - Moo-Rumg Loo
- Institute of Molecular and Cellular Biology, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 106, Taiwan, Republic of China
| | - Wen-Yen Chang
- Institute of Molecular and Cellular Biology, National Taiwan University, No. 1, Section 4, Roosevelt Road, Taipei 106, Taiwan, Republic of China
| | - Po-Hsiang Zhang
- Institute of Biomedical Sciences, Mackay Medical College, No. 46, Section 3 Zhongzhen Road, Sanzhi Dist., New Taipei City 252, Taiwan, Republic of China
| | - Huai-Jen Tsai
- Institute of Biomedical Sciences, Mackay Medical College, No. 46, Section 3 Zhongzhen Road, Sanzhi Dist., New Taipei City 252, Taiwan, Republic of China
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20
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Jain T, Nikolopoulou EA, Xu Q, Qu A. Hypoxia inducible factor as a therapeutic target for atherosclerosis. Pharmacol Ther 2018; 183:22-33. [DOI: 10.1016/j.pharmthera.2017.09.003] [Citation(s) in RCA: 77] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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21
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Rossi A, Murta V, Auzmendi J, Ramos AJ. Early Gabapentin Treatment during the Latency Period Increases Convulsive Threshold, Reduces Microglial Activation and Macrophage Infiltration in the Lithium-Pilocarpine Model of Epilepsy. Pharmaceuticals (Basel) 2017; 10:ph10040093. [PMID: 29182533 PMCID: PMC5748648 DOI: 10.3390/ph10040093] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 11/14/2017] [Accepted: 11/19/2017] [Indexed: 12/20/2022] Open
Abstract
The lithium-pilocarpine model of epilepsy reproduces several features of temporal lobe epilepsy in humans, including the chronological timeline of an initial latency period followed by the development of spontaneous seizures. Epilepsy therapies in humans are implemented, as a rule, after the onset of the spontaneous seizures. We here studied the potential effect on epileptogenesis of starting an early treatment during the latency period, in order to prevent the development of spontaneous seizures. Adult male Wistar rats were treated with 3 mEq/kg LiCl, and 20 h later 30 mg/kg pilocarpine. Once status epilepticus (SE) was achieved, it was allowed to last for 20 min, and then motor seizures were controlled with the administration of 20 mg/kg diazepam. At 1DPSE (DPSE, days post-status epilepticus), animals started to receive 400 mg/kg/day gabapentin or saline for 4 days. At 5DPSE, we observed that SE induced an early profuse microglial and astroglial reactivity, increased synaptogenic trombospondin-1 expression and reduced AQP4 expression in astroglial ending feet. Blood brain barrier (BBB) integrity seemed to be compromised, as infiltrating NG2+ macrophages and facilitated access to the CNS was observed by transplanting eGFP+ blood cells and bone marrow-derived progenitors in the SE animals. The early 4-day gabapentin treatment successfully reduced microglial cell reactivity and blood-borne cell infiltration, without significantly altering the mRNA of proinflammatory cytokines IL-1β and TNFα immediately after the treatment. After 21DSPE, another group of animals that developed SE and received 4 days of gabapentin treatment, were re-exposed to subconvulsive accumulative doses of pilocarpine (10 mg/kg/30 min) and were followed by recording the Racine scale reached. Early 4-day gabapentin treatment reduced the Racine scale reached by the animals, reduced animal mortality, and reduced the number of animals that achieved SE (34% vs. 72%). We conclude that early gabapentin treatment following SE, during the latency period, is able to reduce neuroinflammation and produces a persistent effect that limits seizures and increases convulsive threshold, probably by restricting microglial reactivity and spurious synaptogenesis.
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Affiliation(s)
- Alicia Rossi
- Departamento de Histología, Embriología, Biología Celular y Genética, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires CP1121, Argentina.
- Laboratorio de Neuropatología Molecular, Instituto de Biología Celular y Neurociencia "Profesor E. De Robertis" IBCN UBA-CONICET, Buenos Aires CP1121, Argentina.
| | - Veronica Murta
- Laboratorio de Neuropatología Molecular, Instituto de Biología Celular y Neurociencia "Profesor E. De Robertis" IBCN UBA-CONICET, Buenos Aires CP1121, Argentina.
| | - Jerónimo Auzmendi
- Laboratorio de Neuropatología Molecular, Instituto de Biología Celular y Neurociencia "Profesor E. De Robertis" IBCN UBA-CONICET, Buenos Aires CP1121, Argentina.
| | - Alberto Javier Ramos
- Departamento de Histología, Embriología, Biología Celular y Genética, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires CP1121, Argentina.
- Laboratorio de Neuropatología Molecular, Instituto de Biología Celular y Neurociencia "Profesor E. De Robertis" IBCN UBA-CONICET, Buenos Aires CP1121, Argentina.
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Roberts DD, Kaur S, Isenberg JS. Regulation of Cellular Redox Signaling by Matricellular Proteins in Vascular Biology, Immunology, and Cancer. Antioxid Redox Signal 2017; 27:874-911. [PMID: 28712304 PMCID: PMC5653149 DOI: 10.1089/ars.2017.7140] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/28/2017] [Revised: 07/11/2017] [Accepted: 07/13/2017] [Indexed: 12/15/2022]
Abstract
SIGNIFICANCE In contrast to structural elements of the extracellular matrix, matricellular proteins appear transiently during development and injury responses, but their sustained expression can contribute to chronic disease. Through interactions with other matrix components and specific cell surface receptors, matricellular proteins regulate multiple signaling pathways, including those mediated by reactive oxygen and nitrogen species and H2S. Dysregulation of matricellular proteins contributes to the pathogenesis of vascular diseases and cancer. Defining the molecular mechanisms and receptors involved is revealing new therapeutic opportunities. Recent Advances: Thrombospondin-1 (TSP1) regulates NO, H2S, and superoxide production and signaling in several cell types. The TSP1 receptor CD47 plays a central role in inhibition of NO signaling, but other TSP1 receptors also modulate redox signaling. The matricellular protein CCN1 engages some of the same receptors to regulate redox signaling, and ADAMTS1 regulates NO signaling in Marfan syndrome. In addition to mediating matricellular protein signaling, redox signaling is emerging as an important pathway that controls the expression of several matricellular proteins. CRITICAL ISSUES Redox signaling remains unexplored for many matricellular proteins. Their interactions with multiple cellular receptors remains an obstacle to defining signaling mechanisms, but improved transgenic models could overcome this barrier. FUTURE DIRECTIONS Therapeutics targeting the TSP1 receptor CD47 may have beneficial effects for treating cardiovascular disease and cancer and have recently entered clinical trials. Biomarkers are needed to assess their effects on redox signaling in patients and to evaluate how these contribute to their therapeutic efficacy and potential side effects. Antioxid. Redox Signal. 27, 874-911.
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Affiliation(s)
- David D. Roberts
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Sukhbir Kaur
- Laboratory of Pathology, Center for Cancer Research, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Jeffrey S. Isenberg
- Division of Pulmonary, Allergy and Critical Care, Heart, Lung, Blood and Vascular Medicine Institute, University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania
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MacLauchlan SC, Calabro NE, Huang Y, Krishna M, Bancroft T, Sharma T, Yu J, Sessa WC, Giordano F, Kyriakides TR. HIF-1α represses the expression of the angiogenesis inhibitor thrombospondin-2. Matrix Biol 2017; 65:45-58. [PMID: 28789925 DOI: 10.1016/j.matbio.2017.07.002] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2017] [Revised: 07/13/2017] [Accepted: 07/15/2017] [Indexed: 12/22/2022]
Abstract
Thrombospondin-2 (TSP2) is a potent inhibitor of angiogenesis whose expression is dynamically regulated following injury. In the present study, it is shown that HIF-1α represses TSP2 transcription. Specifically, in vitro studies demonstrate that the prolyl hydroxylase inhibitor DMOG or hypoxia decrease TSP2 expression in fibroblasts. This effect is shown to be via a transcriptional mechanism as hypoxia does not alter TSP2 mRNA stability and this effect requires the TSP2 promoter. In addition, the documented repressive effect of nitric oxide (NO) on TSP2 is shown to be non-canonical and involves stabilization of hypoxia inducible factor-1a (HIF-1α). The regulation of TSP2 by hypoxia is supported by the in vivo observation that TSP2 has spatiotemporal expression distinct from regions of hypoxia in gastrocnemius muscle following murine hindlimb ischemia (HLI). A role for TSP2 regulation by HIF-1α is supported by the dysregulation of TSP2 expression in SM22α-cre HIF-1α KO mice following HLI. Indeed, there is a reduction in blood flow recovery in the SM22a-cre HIF-1α KO mice compared to littermate controls following HLI surgery, associated with impaired recovery and increased TSP2 levels. Moreover, SM22α-cre HIF-1α KO smooth muscle cells mice have increased TSP2 mRNA levels that persist in hypoxia. These findings identify a novel, ischemia-induced pro-angiogenic mechanism involving the transcriptional repression of TSP2 by HIF-1α.
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Affiliation(s)
- Susan C MacLauchlan
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Nicole E Calabro
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Yan Huang
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Section of Cardiovascular Medicine, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Meenakshi Krishna
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Tara Bancroft
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Tanuj Sharma
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Jun Yu
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Section of Cardiovascular Medicine, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - William C Sessa
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pharmacology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Frank Giordano
- Section of Cardiovascular Medicine, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
| | - Themis R Kyriakides
- Interdepartmental Program in Vascular Biology and Therapeutics, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA; Department of Pathology, Amistad Building, Yale University School of Medicine, New Haven, CT 06520, USA.
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Bai YP, Xiao S, Tang YB, Tan Z, Tang H, Ren Z, Zeng H, Yang Z. Shear stress-mediated upregulation of GTP cyclohydrolase/tetrahydrobiopterin pathway ameliorates hypertension-related decline in reendothelialization capacity of endothelial progenitor cells. J Hypertens 2017; 35:784-797. [PMID: 28033126 DOI: 10.1097/hjh.0000000000001216] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
OBJECTIVES Guanosine triphosphate cyclohydrolase/tetrahydrobiopterin (GTPCH)/(BH4) pathway has been proved to regulate the function of endothelial progenitor cells (EPCs) in deoxycorticosterone acetate-salt hypertensive mice, indicating that GTPCH/BH4 pathway may be an important repair target for hypertension-related endothelial injury. Shear stress is an important nonpharmacologic strategy to modulate the function of EPCs. Here, we investigated the effects of laminar shear stress on the GTPCH/BH4 pathway and endothelial repair capacity of circulating EPCs in hypertension. METHOD Laminar shear stress was loaded on the human EPCs from hypertensive patients and normotensive patients. The in-vitro function, in-vivo reendothelialization capacity and GTPCH/BH4 pathway of human EPCs were evaluated. RESULTS Both in-vitro function and reendothelialization capacity of EPCs were lower in hypertensive patients than that in normotensive patients. The GTPCH/BH4 pathway of EPCs was downregulated in hypertensive patients. Shear stress increased in-vitro function and reendothelialization capacity of EPCs from hypertensive patients and normotensive patients. Furthermore, shear stress upregulated the expression of GTPCH I and levels of BH4, nitric oxide, and cGMP of EPCs, and reduced thrombospondin-1 expression. With treatment of GTPCH knockdown or nitroarginine methyl ester inhibition, shear stress-induced increased levels of BH4, nitric oxide and cGMP of EPCs was suppressed. When GTPCH/BH4 pathway of EPCs was blocked, the effects of shear stress on in-vitro function and reendothelialization capacity of EPCs were inhibited. CONCLUSION The study demonstrates for the first time that shear stress-induced upregulation of the GTPCH/BH4 pathway ameliorates hypertension-related decline in endothelial repair capacity of EPCs. These findings provide novel nonpharmacologic therapeutic approach for hypertension-related endothelial repair.
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Affiliation(s)
- Yong-Ping Bai
- aDepartment of Geriatric Medicine, Xiangya Hospital, Central South University, Changsha, Hunan bDepartment of Neurology, Sun Yat-Sen Memorial Hospital cDepartment of Pharmacology, Zhongshan School of Medicine dDepartment of Physiology, Zhongshan School of Medicine, Sun Yat-Sen University eSun Yat-Sen University Cancer Center, State Key Laboratory of Oncology in South China, Collaborative Innovation Center for Cancer Medicine fCenter for Reproductive Medicine, The Sixth Affiliated Hospital gDepartment of Hypertension & Vascular Disease, The First Affiliated Hospital, Sun Yat-Sen University, Guangzhou, Guangdong, People's Republic of China
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Woodby B, Scott M, Bodily J. The Interaction Between Human Papillomaviruses and the Stromal Microenvironment. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2016; 144:169-238. [PMID: 27865458 PMCID: PMC5727914 DOI: 10.1016/bs.pmbts.2016.09.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Human papillomaviruses (HPVs) are small, double-stranded DNA viruses that replicate in stratified squamous epithelia and cause a variety of malignancies. Current efforts in HPV biology are focused on understanding the virus-host interactions that enable HPV to persist for years or decades in the tissue. The importance of interactions between tumor cells and the stromal microenvironment has become increasingly apparent in recent years, but how stromal interactions impact the normal, benign life cycle of HPVs, or progression of lesions to cancer is less understood. Furthermore, how productively replicating HPV impacts cells in the stromal environment is also unclear. Here we bring together some of the relevant literature on keratinocyte-stromal interactions and their impacts on HPV biology, focusing on stromal fibroblasts, immune cells, and endothelial cells. We discuss how HPV oncogenes in infected cells manipulate other cells in their environment, and, conversely, how neighboring cells may impact the efficiency or course of HPV infection.
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Affiliation(s)
- B Woodby
- Louisiana State University Health Sciences Center, Shreveport, LA, United States
| | - M Scott
- Louisiana State University Health Sciences Center, Shreveport, LA, United States
| | - J Bodily
- Louisiana State University Health Sciences Center, Shreveport, LA, United States.
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Abstract
The anoxemia theory proposes that an imbalance between the demand for and supply of oxygen in the arterial wall is a key factor in the development of atherosclerosis. There is now substantial evidence that there are regions within the atherosclerotic plaque in which profound hypoxia exists; this may fundamentally change the function, metabolism, and responses of many of the cell types found within the developing plaque and whether the plaque will evolve into a stable or unstable phenotype. Hypoxia is characterized in molecular terms by the stabilization of hypoxia-inducible factor (HIF) 1α, a subunit of the heterodimeric nuclear transcriptional factor HIF-1 and a master regulator of oxygen homeostasis. The expression of HIF-1 is localized to perivascular tissues, inflammatory macrophages, and smooth muscle cells adjacent to the necrotic core of atherosclerotic lesions and regulates several genes that are important to vascular function including vascular endothelial growth factor, nitric oxide synthase, endothelin-1, and erythropoietin. This review summarizes the effects of hypoxia on the functions of cells involved in atherogenesis and the evidence for its potential importance from experimental models and clinical studies.
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Affiliation(s)
- Gordon A A Ferns
- 1 Department of Medical Education, Brighton & Sussex Medical School, Brighton, United Kingdom
| | - Lamia Heikal
- 1 Department of Medical Education, Brighton & Sussex Medical School, Brighton, United Kingdom
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27
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Ernens I, Bousquenaud M, Lenoir B, Devaux Y, Wagner DR. Adenosine stimulates angiogenesis by up-regulating production of thrombospondin-1 by macrophages. J Leukoc Biol 2014; 97:9-18. [PMID: 25387836 DOI: 10.1189/jlb.3hi0514-249rr] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Abstract
Increase of blood capillary density at the interface between normal and ischemic tissue after acute MI reduces infarct size and improves cardiac function. Cardiac injury triggers the production of the matricellular component TSP-1, but its role in angiogenesis is not clear, as both anti- and proangiogenic properties have been reported. It is unknown whether TSP-1 is modulated by other factors released during cardiac injury. Among these, Ado is a well-known promoter of angiogenesis. This study determined whether Ado modulates TSP-1 expression and the implication on angiogenesis. Ado dose dependently increased the production of TSP-1 by human macrophages. With the use of agonists and antagonists of AdoRs, coupled to RNA interference, we observed that this effect is mediated via A2AR and A2BR. The Ado effect was reproduced by cholera toxin (Gs protein activator) and forskolin (adenylate cyclase activator) and blocked by the PKA inhibitor H89. Conditioned medium from Ado-treated macrophages stimulated microvessel outgrowth from aortic ring explants by 400%, and induced vessel formation in matrigel plugs. Microvessel outgrowth and vessel formation were blocked completely by addition of anti-TSP-1 antibodies to conditioned medium. Chronic administration of Ado to rats after MI maintained long-term expression of TSP-1 in the infarct border zone, and this was associated with enhanced border-zone vascularization. Ado up-regulates TSP-1 production by macrophages, resulting in stimulation of angiogenesis. The mechanism involves A2AR and A2BR and is mediated through the cAMP/PKA pathway. This information may be important when designing Ado-based therapies of angiogenesis.
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Affiliation(s)
- Isabelle Ernens
- *Laboratory of Cardiovascular Research, Centre de Recherche Public-Santé, Luxembourg; and Division of Cardiology, Centre Hospitalier, Luxembourg
| | - Mélanie Bousquenaud
- *Laboratory of Cardiovascular Research, Centre de Recherche Public-Santé, Luxembourg; and Division of Cardiology, Centre Hospitalier, Luxembourg
| | - Bénédicte Lenoir
- *Laboratory of Cardiovascular Research, Centre de Recherche Public-Santé, Luxembourg; and Division of Cardiology, Centre Hospitalier, Luxembourg
| | - Yvan Devaux
- *Laboratory of Cardiovascular Research, Centre de Recherche Public-Santé, Luxembourg; and Division of Cardiology, Centre Hospitalier, Luxembourg
| | - Daniel R Wagner
- *Laboratory of Cardiovascular Research, Centre de Recherche Public-Santé, Luxembourg; and Division of Cardiology, Centre Hospitalier, Luxembourg
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28
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Abstract
Pulmonary artery hypertension (PAH) is a proliferative disorder associated with enhanced pulmonary artery smooth muscle cell proliferation and suppressed apoptosis. The sustainability of this phenotype requires the activation of pro-survival transcription factor like the signal transducers and activators of transcription-3 (STAT3). Using multidisciplinary and translational approaches, we and others have demonstrated that STAT3 activation in both human and experimental models of PAH accounts for the modulation of the expression of several proteins already known as implicated in PAH pathogenesis, as well as for signal transduction to other transcription factors. Furthermore, recent data demonstrated that STAT3 could be therapeutically targeted in different animal models and some molecules are actually in clinical trials for cancer or PAH treatment.
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Affiliation(s)
- Roxane Paulin
- Vascular Biology Research Group; Department of Medicine; University of Alberta; Edmonton, AB Canada
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29
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Christoph M, Ibrahim K, Hesse K, Augstein A, Schmeisser A, Braun-Dullaeus RC, Simonis G, Wunderlich C, Quick S, Strasser RH, Poitz DM. Local inhibition of hypoxia-inducible factor reduces neointima formation after arterial injury in ApoE-/- mice. Atherosclerosis 2014; 233:641-647. [PMID: 24561491 DOI: 10.1016/j.atherosclerosis.2014.01.048] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 01/22/2014] [Accepted: 01/24/2014] [Indexed: 12/13/2022]
Abstract
OBJECTIVE Hypoxia plays a pivotal role in development and progression of restenosis after vascular injury. Under hypoxic conditions the hypoxia-inducible factors (HIFs) are the most important transcription factors for the adaption to reduced oxygen supply. Therefore the aim of the study was to investigate the effect of a local HIF-inhibition and overexpression on atherosclerotic plaque development in a murine vascular injury model. METHODS AND RESULTS After wire-induced vascular injury in ApoE-/- mice a transient, local inhibition of HIF as well as an overexpression approach of the different HIF-subunits (HIF-1α, HIF-2α) by adenoviral infection was performed. The local inhibition of the HIF-pathway using a dominant-negative mutant dramatically reduced the extent of neointima formation. The diminished plaque size was associated with decreased expression of the well-known HIF-target genes vascular endothelial growth factor-A (VEGF-A) and its receptors Flt-1 and Flk-1. In contrast, the local overexpression of HIF-1α and HIF-2α further increased the plaque size after wire-induced vascular injury. CONCLUSIONS Local HIF-inhibition decreases and HIF-α overexpression increases the injury induced neointima formation. These findings provide new insight into the pathogenesis of atherosclerosis and may lead to new therapeutic options for the treatment of in stent restenosis.
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MESH Headings
- Adenoviridae
- Animals
- Apolipoproteins E/deficiency
- Basic Helix-Loop-Helix Transcription Factors/antagonists & inhibitors
- Basic Helix-Loop-Helix Transcription Factors/biosynthesis
- Basic Helix-Loop-Helix Transcription Factors/genetics
- Basic Helix-Loop-Helix Transcription Factors/physiology
- Coronary Restenosis
- Disease Models, Animal
- Endothelium, Vascular/injuries
- Femoral Artery/injuries
- Femoral Artery/pathology
- Genetic Vectors
- Hypoxia-Inducible Factor 1, alpha Subunit/antagonists & inhibitors
- Hypoxia-Inducible Factor 1, alpha Subunit/biosynthesis
- Hypoxia-Inducible Factor 1, alpha Subunit/genetics
- Hypoxia-Inducible Factor 1, alpha Subunit/physiology
- Male
- Mice
- Mice, Knockout
- Neointima/prevention & control
- Plaque, Atherosclerotic/etiology
- Plaque, Atherosclerotic/prevention & control
- Signal Transduction
- Transduction, Genetic
- Up-Regulation
- Vascular Endothelial Growth Factor A/biosynthesis
- Vascular Endothelial Growth Factor A/genetics
- Vascular Endothelial Growth Factor Receptor-1/biosynthesis
- Vascular Endothelial Growth Factor Receptor-1/genetics
- Vascular Endothelial Growth Factor Receptor-2/biosynthesis
- Vascular Endothelial Growth Factor Receptor-2/genetics
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Affiliation(s)
- Marian Christoph
- University of Dresden, Heart Center, University Hospital, Germany
| | - Karim Ibrahim
- University of Dresden, Heart Center, University Hospital, Germany
| | - Kathleen Hesse
- University of Dresden, Heart Center, University Hospital, Germany
| | - Antje Augstein
- University of Dresden, Heart Center, University Hospital, Germany
| | | | | | - Gregor Simonis
- University of Dresden, Heart Center, University Hospital, Germany
| | | | - Silvio Quick
- University of Dresden, Heart Center, University Hospital, Germany
| | - Ruth H Strasser
- University of Dresden, Heart Center, University Hospital, Germany
| | - David M Poitz
- University of Dresden, Heart Center, University Hospital, Germany.
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30
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Quantitative profiling of the rat heart myoblast secretome reveals differential responses to hypoxia and re-oxygenation stress. J Proteomics 2014; 98:138-49. [DOI: 10.1016/j.jprot.2013.12.025] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 12/25/2013] [Accepted: 12/28/2013] [Indexed: 11/18/2022]
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31
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Al-Greene NT, Means AL, Lu P, Jiang A, Schmidt CR, Chakravarthy AB, Merchant NB, Washington MK, Zhang B, Shyr Y, Deane NG, Beauchamp RD. Four jointed box 1 promotes angiogenesis and is associated with poor patient survival in colorectal carcinoma. PLoS One 2013; 8:e69660. [PMID: 23922772 PMCID: PMC3726759 DOI: 10.1371/journal.pone.0069660] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2013] [Accepted: 06/11/2013] [Indexed: 01/08/2023] Open
Abstract
Angiogenesis, the recruitment and re-configuration of pre-existing vasculature, is essential for tumor growth and metastasis. Increased tumor vascularization often correlates with poor patient outcomes in a broad spectrum of carcinomas. We identified four jointed box 1 (FJX1) as a candidate regulator of tumor angiogenesis in colorectal cancer. FJX1 mRNA and protein are upregulated in human colorectal tumor epithelium as compared with normal epithelium and colorectal adenomas, and high expression of FJX1 is associated with poor patient prognosis. FJX1 mRNA expression in colorectal cancer tissues is significantly correlated with changes in known angiogenesis genes. Augmented expression of FJX1 in colon cancer cells promotes growth of xenografts in athymic mice and is associated with increased tumor cell proliferation and vascularization. Furthermore, FJX1 null mice develop significantly fewer colonic polyps than wild-type littermates after combined dextran sodium sulfate (DSS) and azoxymethane (AOM) treatment. In vitro, conditioned media from FJX1 expressing cells promoted endothelial cell capillary tube formation in a HIF1-α dependent manner. Taken together our results support the conclusion that FJX1 is a novel regulator of tumor progression, due in part, to its effect on tumor vascularization.
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Affiliation(s)
- Nicole T. Al-Greene
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Anna L. Means
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, United States of America
- Department of Surgery, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Pengcheng Lu
- Department of Biostatistics, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Aixiang Jiang
- Department of Biostatistics, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Carl R. Schmidt
- Department of Surgery, Vanderbilt University, Nashville, Tennessee, United States of America
| | - A. Bapsi Chakravarthy
- Department of Radiation Oncology, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Nipun B. Merchant
- Department of Surgery, Vanderbilt University, Nashville, Tennessee, United States of America
- Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, Tennessee, United States of America
| | - M. Kay Washington
- Department of Pathology, Vanderbilt University, Nashville, Tennessee, United States of America
- Department of Microbiology and Immunology, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Bing Zhang
- Department of Biomedical Informatics, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Yu Shyr
- Department of Biostatistics, Vanderbilt University, Nashville, Tennessee, United States of America
| | - Natasha G. Deane
- Department of Surgery, Vanderbilt University, Nashville, Tennessee, United States of America
- Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, Tennessee, United States of America
- Vanderbilt University Institute of Imaging Science, Vanderbilt University, Nashville, Tennessee, United States of America
| | - R. Daniel Beauchamp
- Department of Cell and Developmental Biology, Vanderbilt University, Nashville, Tennessee, United States of America
- Department of Surgery, Vanderbilt University, Nashville, Tennessee, United States of America
- Vanderbilt-Ingram Cancer Center, Vanderbilt University, Nashville, Tennessee, United States of America
- Department of Cancer Biology, Vanderbilt University, Nashville, Tennessee, United States of America
- * E-mail:
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VEGF in the crosstalk between human adipocytes and smooth muscle cells: depot-specific release from visceral and perivascular adipose tissue. Mediators Inflamm 2013; 2013:982458. [PMID: 23935253 PMCID: PMC3723083 DOI: 10.1155/2013/982458] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 06/10/2013] [Accepted: 06/10/2013] [Indexed: 01/11/2023] Open
Abstract
Adipose tissue secrets adipokines and fatty acids, which may contribute to obesity-associated vascular dysfunction and cardiovascular risk. This study investigated which factors are responsible for the synergistic effect of adipokine and oleic acid- (OA-) induced proliferation of human vascular smooth muscle cells (VSMC). Adipocyte-conditioned medium (CM) from human adipocytes induces proliferation of VSMC in correlation to its vascular endothelial growth factor (VEGF) content. CM increases VEGF-receptor (VEGF-R) 1 and 2 expression and VEGF secretion of VSMC, while OA only stimulates VEGF secretion. VEGF neutralization abrogates CM- and OA-induced proliferation and considerably reduces proliferation induced by CM and OA in combination. VEGF release is higher from visceral adipose tissue (VAT) of obese subjects compared to subcutaneous adipose tissue (SAT) and VAT from lean controls. Furthermore, VEGF release from VAT correlates with its proliferative effect. Perivascular adipose tissue (PAT) from type 2 diabetic patients releases significantly higher amounts of VEGF and induces stronger proliferation of VSMC as compared to SAT and SAT/PAT of nondiabetics. In conclusion, VEGF is mediating CM-induced proliferation of VSMC. As this adipokine is released in high amounts from VAT of obese patients and PAT of diabetic patients, VEGF might link adipose tissue inflammation to increased VSMC proliferation.
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33
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Bienes-Martínez R, Ordóñez A, Feijoo-Cuaresma M, Corral-Escariz M, Mateo G, Stenina O, Jiménez B, Calzada MJ. Autocrine stimulation of clear-cell renal carcinoma cell migration in hypoxia via HIF-independent suppression of thrombospondin-1. Sci Rep 2012; 2:788. [PMID: 23145312 PMCID: PMC3494377 DOI: 10.1038/srep00788] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Accepted: 10/04/2012] [Indexed: 12/14/2022] Open
Abstract
Thrombospondin-1 is a matricellular protein with potent antitumour activities, the levels of which determine the fate of many different tumours, including renal carcinomas. However, the factors that regulate this protein remain unclear. In renal carcinomas, hypoxic conditions enhance the expression of angiogenic factors that help adapt tumour cells to their hostile environment. Therefore, we hypothesized that anti-angiogenic factors should correspondingly be dampened. Indeed, we found that hypoxia decreased the thrombospondin-1 protein in several clear cell renal carcinoma cell lines (ccRCC), although no transcriptional regulation was observed. Furthermore, we proved that hypoxia stimulates multiple signals that independently contribute to diminish thrombospondin-1 in ccRCC, which include a decrease in the activity of oxygen-dependent prolylhydroxylases (PHDs) and activation of the PI3K/Akt signalling pathway. In addition, thrombospondin-1 regulation in hypoxia proved to be important for ccRCC cell migration and invasion.
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Affiliation(s)
- Raquel Bienes-Martínez
- Instituto de Investigación Sanitaria Princesa, Department of Medicine, Universidad Autónoma of Madrid, Madrid, Spain
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34
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Rogers NM, Yao M, Novelli EM, Thomson AW, Roberts DD, Isenberg JS. Activated CD47 regulates multiple vascular and stress responses: implications for acute kidney injury and its management. Am J Physiol Renal Physiol 2012; 303:F1117-25. [PMID: 22874763 PMCID: PMC3469673 DOI: 10.1152/ajprenal.00359.2012] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Accepted: 08/05/2012] [Indexed: 02/08/2023] Open
Abstract
Ischemia-reperfusion injury (IRI) remains a significant source of early and delayed renal transplant failure. Therapeutic interventions have yet to resolve this ongoing clinical challenge although the reasons for this remain unclear. The cell surface receptor CD47 is widely expressed on vascular cells and in tissues. It has one known soluble ligand, the stress-released matricellular protein thrombospondin-1 (TSP1). The TSP1-CD47 ligand receptor axis controls a number of important cellular processes, inhibiting survival factors such as nitric oxide, cGMP, cAMP, and VEGF, while activating injurious pathways such as production of reactive oxygen species. A role of CD47 in renal IRI was recently revealed by the finding that the TSP1-CD47 axis is induced in renal tubular epithelial cells (RTEC) under hypoxia and following IRI. The absence of CD47 in knockout mice increases survival, mitigates RTEC damage, and prevents subsequent kidney failure. Conversely, therapeutic blockade of TSP1-CD47 signaling provides these same advantages to wild-type animals. Together, these findings suggest an important role for CD47 in renal IRI as a proximate promoter of injury and as a novel therapeutic target.
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Affiliation(s)
- Natasha M Rogers
- Vascular Medicine Institute, University of Pittsburgh School of Medicine, 200 Lothrop St., Pittsburgh, PA 15261, USA
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Hong KS, Kim HS, Kim SH, Lim DJ, Park JY, Kim SD. Hypoxia induces Wee1 expression and attenuates hydrogen peroxide-induced endothelial damage in MS1 cells. Exp Mol Med 2012; 43:653-9. [PMID: 21918363 DOI: 10.3858/emm.2011.43.12.074] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
In an oxygen-depleted environment, endothelial cells initiate an adaptive pattern of synthesis, which may enable them to survive hypoxic crises. Using high-resolution two-dimensional gel electrophoresis in conjunction with mass spectroscopy, we obtained a 24 differential display of proteins in the pancreatic endothelial cell line, MS-1, at four time points following induction of hypoxia. The induction of Wee1 under hypoxia was confirmed both at the mRNA and protein levels. The phosphorylation of cell division cycle 2, which is downstream of Wee1, was also increased after hypoxic exposure. In addition, pre-exposure to hypoxia attenuated a decrease in hydrogen peroxide-induced cell number. The induction of bax (a pro-apoptotic protein) and reduction of bcl (an anti-apoptotic protein) after hypoxia stimulus were also attenuated by hypoxic pre-exposure. Moreover, hydrogen peroxide-induced morphologic damage did not appear in the wild-type Wee1-expressing cells. Taken together, our results suggest that Wee1 may have important role in hypoxia- induced pathophysiological situations in endothelial cells.
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Affiliation(s)
- Ki Sun Hong
- Department of Neurosurgery Korea University Ansan Hospital Korea University College of Medicine Ansan 425-707, Korea
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Ji Q, Yang L, Zhou J, Lin R, Zhang J, Lin Q, Wang W, Zhang K. Protective effects of paeoniflorin against cobalt chloride-induced apoptosis of endothelial cells via HIF-1α pathway. Toxicol In Vitro 2012; 26:455-61. [DOI: 10.1016/j.tiv.2012.01.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Revised: 11/25/2011] [Accepted: 01/10/2012] [Indexed: 10/14/2022]
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Masuda T, Muto S, Fujisawa G, Iwazu Y, Kimura M, Kobayashi T, Nonaka-Sarukawa M, Sasaki N, Watanabe Y, Shinohara M, Murakami T, Shimada K, Kobayashi E, Kusano E. Heart angiotensin II-induced cardiomyocyte hypertrophy suppresses coronary angiogenesis and progresses diabetic cardiomyopathy. Am J Physiol Heart Circ Physiol 2012; 302:H1871-83. [PMID: 22389386 DOI: 10.1152/ajpheart.00663.2011] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
To examine whether and how heart ANG II influences the coordination between cardiomyocyte hypertrophy and coronary angiogenesis and contributes to the pathogenesis of diabetic cardiomyopathy, we used Spontaneously Diabetic Torii (SDT) rats treated without and with olmesartan medoxomil (an ANG II receptor blocker). In SDT rats, left ventricular (LV) ANG II, but not circulating ANG II, increased at 8 and 16 wk after diabetes onset. SDT rats developed LV hypertrophy and diastolic dysfunction at 8 wk, followed by LV systolic dysfunction at 16 wk, without hypertension. The SDT rat LV exhibited cardiomyocyte hypertrophy and increased hypoxia-inducible factor-1α expression at 8 wk and to a greater degree at 16 wk and interstitial fibrosis at 16 wk only. In SDT rats, coronary angiogenesis increased with enhanced capillary proliferation and upregulation of the angiogenic factor VEGF at 8 wk but decreased VEGF with enhanced capillary apoptosis and suppressed capillary proliferation despite the upregulation of VEGF at 16 wk. In SDT rats, the phosphorylation of VEGF receptor-2 increased at 8 wk alone, whereas the expression of the antiangiogenic factor thrombospondin-1 increased at 16 wk alone. All these events, except for hyperglycemia or blood pressure, were reversed by olmesartan medoxomil. These results suggest that LV ANG II in SDT rats at 8 and 16 wk induces cardiomyocyte hypertrophy without affecting hyperglycemia or blood pressure, which promotes and suppresses coronary angiogenesis, respectively, via VEGF and thrombospondin-1 produced from hypertrophied cardiomyocytes under chronic hypoxia. Thrombospondin-1 may play an important role in the progression of diabetic cardiomyopathy in this model.
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Affiliation(s)
- Takahiro Masuda
- Divisions of Nephrology, Department of Internal Medicine, Jichi Medical University, Yakushiji, Shimotsuke, Japan
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Hung SP, Ho JH, Shih YRV, Lo T, Lee OK. Hypoxia promotes proliferation and osteogenic differentiation potentials of human mesenchymal stem cells. J Orthop Res 2012; 30:260-6. [PMID: 21809383 DOI: 10.1002/jor.21517] [Citation(s) in RCA: 184] [Impact Index Per Article: 15.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2010] [Accepted: 07/08/2011] [Indexed: 02/04/2023]
Abstract
Mesenchymal stem cells (MSCs), which can be isolated from bone marrow and other somatic tissues, are residing in an environment with relative low oxygen tension. The purpose of this study is to investigate the effects of hypoxia on MSCs, and we hypothesize that oxygen concentration regulates the intricate balance between cellular proliferation and commitment towards differentiation. In this study, human bone marrow-derived MSCs were cultured under hypoxia with 1% O(2). The proliferation ability of MSCs was increased after a 7-day hypoxic culture period. Migration assay showed that hypoxia enhanced the migration capabilities of MSCs. Moreover, expression of stemness genes Oct4, Nanog, Sall4 and Klf4 was increased under hypoxia. Furthermore, the differentiation ability of MSCs under hypoxia favored osteogenesis while adipogenesis was inhibited during a 4-week induction period. Cytokine antibody array analysis showed that a number of growth factors were up-regulated after a 7-day hypoxic incubation and the differential expression of growth factors may account for the increased proliferation and osteogenic potentials of MSCs under hypoxic condition. Taken together, hypoxia provides a favorable culture condition to promote proliferation as well as osteogenesis of MSCs through differential growth factor production.
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Affiliation(s)
- Shun-Pei Hung
- Institute of Clinical Medicine, National Yang-Ming University, Taipei, Taiwan
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Fediuk J, Gutsol A, Nolette N, Dakshinamurti S. Thromboxane-induced actin polymerization in hypoxic pulmonary artery is independent of Rho. Am J Physiol Lung Cell Mol Physiol 2012; 302:L13-26. [DOI: 10.1152/ajplung.00016.2011] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
Actin polymerization (APM), regulated by Rho GTPases, promotes myocyte force generation. Hypoxia is known to impede postnatal disassembly of the actin cytoskeleton in pulmonary arterial (PA) myocytes. We compared basal and agonist-induced APM in myocytes from PA and descending aorta (Ao), under hypoxic and normoxic conditions. We also examined effects of thromboxane challenge on force generation and cytoskeletal assembly in resistance PA and renal arteries from neonatal swine with persistent pulmonary hypertension (PPHN) induced by 72-h normobaric hypoxia, compared with age-matched controls. Synthetic and contractile phenotype myocytes from neonatal porcine PA or Ao were grown in hypoxia (10% O2) or normoxia (21% O2) for 7 days, then challenged with 10−6 M thromboxane mimetic U46619. F/G actin ratio was quantified by laser-scanning cytometry and by cytoskeletal fractionation. Thromboxane receptor (TP) G protein coupling was measured by immunoprecipitation and probing for Gαq, G12, or G13, RhoA activation by Rhotekin-RBD affinity precipitation, and LIM kinase (LIMK) and cofilin phosphorylation by Western blot. Isometric force to serial concentrations of U46619 was measured in muscular pulmonary and renal arteries from PPHN and control swine; APM was quantified in fixed contracted vessels. Contractile PA myocytes exhibit marked Rho-dependent APM in hypoxia, with increased active RhoA and LIMK phosphorylation. Their additional APM response to U46619 challenge is independent of RhoA, reflecting decreased TP association with G12/13 in favor of Gαq. In contrast, hypoxic contractile Ao myocytes polymerize actin modestly and depolymerize to U46619. Both basal APM and the APM response to U46619 are increased in PPHN PA. APM corresponds with increased force generation to U46619 challenge in PPHN PA but not renal arteries.
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Affiliation(s)
- Jena Fediuk
- Departments of 1Physiology and
- Biology of Breathing Group, Manitoba Institute of Child Health, Winnipeg, Manitoba, Canada
| | - Alexey Gutsol
- Biology of Breathing Group, Manitoba Institute of Child Health, Winnipeg, Manitoba, Canada
| | - Nora Nolette
- Biology of Breathing Group, Manitoba Institute of Child Health, Winnipeg, Manitoba, Canada
| | - Shyamala Dakshinamurti
- Departments of 1Physiology and
- Pediatrics, University of Manitoba
- Biology of Breathing Group, Manitoba Institute of Child Health, Winnipeg, Manitoba, Canada
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Zuloaga KL, Gonzales RJ. Dihydrotestosterone attenuates hypoxia inducible factor-1α and cyclooxygenase-2 in cerebral arteries during hypoxia or hypoxia with glucose deprivation. Am J Physiol Heart Circ Physiol 2011; 301:H1882-90. [DOI: 10.1152/ajpheart.00446.2011] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Dihydrotestosterone (DHT) attenuates cytokine-induced cyclooxygenase-2 (COX-2) in coronary vascular smooth muscle. Since hypoxia inducible factor-1α (HIF-1α) activation can lead to COX-2 production, this study determined the influence of DHT on HIF-1α and COX-2 following hypoxia or hypoxia with glucose deprivation (HGD) in the cerebral vasculature. COX-2 and HIF-1α levels were assessed via Western blot, and HIF-1α activation was indirectly measured via a DNA binding assay. Experiments were performed using cerebral arteries isolated from castrated male rats treated in vivo with placebo or DHT (18 days) followed by hypoxic exposure ex vivo (1% O2), cerebral arteries isolated from castrated male rats treated ex vivo with vehicle or DHT (10 or 100 nM; 18 h) and then exposed to hypoxia ex vivo (1% O2), or primary human brain vascular smooth muscle cells treated with DHT (10 nM; 6 h) or vehicle then exposed to hypoxia or HGD. Under normoxic conditions, DHT increased COX-2 (cells 51%; arteries ex vivo 31%; arteries in vivo 161%) but had no effect on HIF-1α. Following hypoxia or HGD, HIF-1α and COX-2 levels were increased; this response was blunted by DHT (cells HGD: −47% COX-2, −34% HIF-1α; cells hypoxia: −29% COX-2, −54% HIF-1α; arteries ex vivo: −37% COX-2; arteries in vivo: −35% COX-2) and not reversed by androgen receptor blockade. Hypoxia-induced HIF-1α DNA-binding was also attenuated by DHT (arteries ex vivo and in vivo: −55%). These results demonstrate that upregulation of COX-2 and HIF-1α in response to hypoxia is suppressed by DHT via an androgen receptor-independent mechanism.
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Affiliation(s)
- Kristen L. Zuloaga
- Department of Basic Medical Sciences, University of Arizona College of Medicine, Phoenix, Arizona; and
- Department of Biomedical Sciences, Colorado State University, Fort Collins, Colorado
| | - Rayna J. Gonzales
- Department of Basic Medical Sciences, University of Arizona College of Medicine, Phoenix, Arizona; and
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Firlej V, Mathieu JRR, Gilbert C, Lemonnier L, Nakhlé J, Gallou-Kabani C, Guarmit B, Morin A, Prevarskaya N, Delongchamps NB, Cabon F. Thrombospondin-1 triggers cell migration and development of advanced prostate tumors. Cancer Res 2011; 71:7649-58. [PMID: 22037878 DOI: 10.1158/0008-5472.can-11-0833] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The antitumor effects of pharmacologic inhibitors of angiogenesis are hampered in patients by the rapid development of tumor resistance, notably through increased invasiveness and accelerated metastasis. Here, we reevaluated the role of the endogenous antiangiogenic thrombospondin 1 (TSP1) in prostate carcinomas in which angiogenesis is an active process. In xenografted tumors, we observed that TSP1 altogether inhibited angiogenesis and fostered tumor development. Our results show that TSP1 is a potent stimulator of prostate tumor cell migration. This effect required CD36, which also mediates TSP1 antiangiogenic activity, and was mimicked by an antiangiogenic TSP1-derived peptide. As suspected for pharmacologic inhibitors of angiogenesis, the TSP1 capacities to increase hypoxia and to trigger cell migration are thus inherently linked. Importantly, although antiangiogenic TSP1 increases hypoxia in vivo, our data show that, in turn, hypoxia induced TSP1, thus generating a vicious circle in prostate tumors. In radical prostatectomy specimens, we found TSP1 expression significantly associated with invasive tumors and with tumors which eventually recurred. TSP1 may thus help select patients at risk of prostate-specific antigen relapse. Together, the data suggest that intratumor disruption of the hypoxic cycle through TSP1 silencing will limit tumor invasion.
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Stenczer B, Molvarec A, Szabó G, Szarka A, Fügedi G, Szijártó J, Rigó J. Circulating levels of thrombospondin-1 are decreased in HELLP syndrome. Thromb Res 2011; 129:470-3. [PMID: 22035632 DOI: 10.1016/j.thromres.2011.09.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2011] [Revised: 09/26/2011] [Accepted: 09/30/2011] [Indexed: 10/15/2022]
Abstract
BACKGROUND Preeclampsia is characterised by an imbalance of circulating pro- and anti-angiogenic factors. The syndrome of haemolysis, elevated liver enzymes and low platelet count (HELLP) develops mostly on the ground of preeclampsia, and one of its important features is the severe disturbance of the coagulation system, intravascular coagulopathy. Thrombospondin-1 (TSP-1) is derived from the endothelium and platelets, and exerts potent pro-thrombotic and anti-angiogenic effects. Our aim was to determine, whether its circulating levels are altered in preeclampsia and in HELLP syndrome. METHODS We enrolled 45 pregnant women with early-, 43 with late-onset preeclampsia, 21 with HELLP-syndrome, 45 with uncomplicated pregnancy and 20 non-pregnant controls in our case-control study. TSP-1 levels were determined by enzyme-linked immunosorbent assay. RESULTS Circulating TSP-1 levels were lower in HELLP syndrome compared to all other study groups, while they were unaltered in preeclampsia compared to the control groups. There was a significant positive linear correlation between TSP-1 levels and platelet count in HELLP syndrome. In patients with more severe HELLP syndrome, TSP-1 levels were significantly lower compared to women suffering from a milder form of HELLP syndrome. CONCLUSIONS Circulating thrombospondin-1 levels are decreased in HELLP syndrome and they seem to reflect disease severity, lower levels representing a more severe state. Nevertheless, despite its potent anti-angiogenic effect, our results suggest that circulating TSP-1 does not play a significant role in the pathogenesis of preeclampsia.
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Affiliation(s)
- Balázs Stenczer
- First Department of Obstetrics and Gynecology, Semmelweis University, Budapest, Hungary.
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Parathath S, Mick SL, Feig JE, Joaquin V, Grauer L, Habiel DM, Gassmann M, Gardner LB, Fisher EA. Hypoxia is present in murine atherosclerotic plaques and has multiple adverse effects on macrophage lipid metabolism. Circ Res 2011; 109:1141-52. [PMID: 21921268 DOI: 10.1161/circresaha.111.246363] [Citation(s) in RCA: 125] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
RATIONALE Human atherosclerotic plaques contain large numbers of cells deprived of O(2). In murine atherosclerosis, because the plaques are small, it is controversial whether hypoxia can occur. OBJECTIVE To examine if murine plaques contain hypoxic cells, and whether hypoxia regulates changes in cellular lipid metabolism and gene expression in macrophages. METHODS AND RESULTS Aortic plaques from apolipoprotein-E-deficient mice were immunopositive for hypoxia-inducible transcription factor (HIF-1α) and some of its downstream targets. Murine J774 macrophages rendered hypoxic demonstrated significant increases in cellular sterol and triglycerides. The increase in sterol content in hypoxic macrophages correlated with elevated 3-hydroxy-3-methyl-glutaryl-CoA (HMG-CoA) reductase activity and mRNA levels. In addition, when macrophages were incubated with cholesterol complexes, hypoxic cells accumulated 120% more cholesterol, predominately in the free form. Cholesterol-efflux assays showed that hypoxia significantly decreased efflux mediated by ATP-binding cassette subfamily A member 1 (ABCA1), whose sub cellular localization was altered in both J774 and primary macrophages. Furthermore, in vivo expression patterns of selected genes from cells in hypoxic regions of murine plaques were similar to those from J774 and primary macrophages incubated in hypoxia. The hypoxia-induced accumulation of sterol and decreased cholesterol efflux was substantially reversed in vitro by reducing the expression of the hypoxia-inducible transcription factor, HIF-1α. CONCLUSION Hypoxic regions are present in murine plaques. Hypoxic macrophages have increased sterol content due to the induction of sterol synthesis and the suppression of cholesterol efflux, effects that are in part mediated by HIF-1α.
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Affiliation(s)
- Sajesh Parathath
- NYU School of Medicine, Departments of Medicine (Cardiology) and Cell Biology, Marc and Ruti Bell Program in Vascular Biology, New York, NY 10016, USA
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Avouac J, Clemessy M, Distler JH, Gasc JM, Ruiz B, Vacher-Lavenu MC, Wipff J, Kahan A, Boileau C, Corvol P, Allanore Y. Enhanced expression of ephrins and thrombospondins in the dermis of patients with early diffuse systemic sclerosis: potential contribution to perturbed angiogenesis and fibrosis. Rheumatology (Oxford) 2011; 50:1494-504. [DOI: 10.1093/rheumatology/keq448] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
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Mihout F, Shweke N, Bigé N, Jouanneau C, Dussaule JC, Ronco P, Chatziantoniou C, Boffa JJ. Asymmetric dimethylarginine (ADMA) induces chronic kidney disease through a mechanism involving collagen and TGF-β1 synthesis. J Pathol 2010; 223:37-45. [DOI: 10.1002/path.2769] [Citation(s) in RCA: 72] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2010] [Revised: 07/19/2010] [Accepted: 08/09/2010] [Indexed: 02/01/2023]
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Fu H, Luo F, Yang L, Wu W, Liu X. Hypoxia stimulates the expression of macrophage migration inhibitory factor in human vascular smooth muscle cells via HIF-1alpha dependent pathway. BMC Cell Biol 2010; 11:66. [PMID: 20727156 PMCID: PMC2931459 DOI: 10.1186/1471-2121-11-66] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2010] [Accepted: 08/20/2010] [Indexed: 02/05/2023] Open
Abstract
Background Hypoxia plays an important role in vascular remodeling and directly affects vascular smooth muscle cells (VSMC) functions. Macrophage migration inhibitory factor (MIF) is a well known proinflammatory factor, and recent evidence suggests an important role of MIF in the progression of atherosclerosis and restenosis. However, the potential link between hypoxia and MIF in VSMC has not been investigated. The current study was designed to test whether hypoxia could regulate MIF expression in human VSMC. The effect of modulating MIF expression on hypoxia-induced VSMC proliferation and migration was also investigated at the same time. Results Expression of MIF mRNA and protein was up-regulated as early as 2 hours in cultured human VSMCs after exposed to moderate hypoxia condition (3% O2). The up-regulation of MIF expression appears to be dependent on hypoxia-inducible transcription factor-1α(HIF-1α) since knockdown of HIF-1α inhibits the hypoxia induction of MIF gene and protein expression. The hypoxia induced expression of MIF was attenuated by antioxidant treatment as well as by inhibition of extracellular signal-regulated kinase (ERK). Under moderate hypoxia conditions (3% O2), both cell proliferation and cell migration were increased in VSMC cells. Blocking the MIF by specific small interference RNA to MIF (MIF-shRNA) resulted in the suppression of proliferation and migration of VSMCs. Conclusion Our results demonstrated that in VSMCs, hypoxia increased MIF gene expression and protein production. The hypoxia-induced HIF-1α activation, reactive oxygen species (ROS) generation and ERK activation might be involved in this response. Both MIF and HIF-1α mediated the hypoxia response of vascular smooth muscle cells, including cell migration and proliferation.
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Affiliation(s)
- Hua Fu
- Department of Cardiology, West China Hospital, Sichuan University, Chengdu 610041, China
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Patten DA, Lafleur VN, Robitaille GA, Chan DA, Giaccia AJ, Richard DE. Hypoxia-inducible factor-1 activation in nonhypoxic conditions: the essential role of mitochondrial-derived reactive oxygen species. Mol Biol Cell 2010; 21:3247-57. [PMID: 20660157 PMCID: PMC2938389 DOI: 10.1091/mbc.e10-01-0025] [Citation(s) in RCA: 122] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Hypoxia-inducible factor-1 (HIF-1) is a key transcription factor for responses to low oxygen. Different nonhypoxic stimuli, including hormones and growth factors, are also important HIF-1 activators in the vasculature. Angiotensin II (Ang II), the main effecter hormone in the renin-angiotensin system, is a potent HIF-1 activator in vascular smooth muscle cells (VSMCs). HIF-1 activation by Ang II involves intricate mechanisms of HIF-1α transcription, translation, and protein stabilization. Additionally, the generation of reactive oxygen species (ROS) is essential for HIF-1 activation during Ang II treatment. However, the role of the different VSMC ROS generators in HIF-1 activation by Ang II remains unclear. This work aims at elucidating this question. Surprisingly, repression of NADPH oxidase-generated ROS, using Vas2870, a specific inhibitor or a p22(phox) siRNA had no significant effect on HIF-1 accumulation by Ang II. In contrast, repression of mitochondrial-generated ROS, by complex III inhibition, by Rieske Fe-S protein siRNA, or by the mitochondrial-targeted antioxidant SkQ1, strikingly blocked HIF-1 accumulation. Furthermore, inhibition of mitochondrial-generated ROS abolished HIF-1α protein stability, HIF-1-dependent transcription and VSMC migration by Ang II. A large number of studies implicate NADPH oxidase-generated ROS in Ang II-mediated signaling pathways in VSMCs. However, our work points to mitochondrial-generated ROS as essential intermediates for HIF-1 activation in nonhypoxic conditions.
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Affiliation(s)
- David A Patten
- Centre de recherche du CHUQ, L'Hôtel-Dieu de Québec, Department of Molecular Biology, Medical Biochemistry and Pathology, Université Laval, Québec, QC, G1R 2J6, Canada
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Zhou J, Dehne N, Brüne B. Nitric oxide causes macrophage migration via the HIF-1-stimulated small GTPases Cdc42 and Rac1. Free Radic Biol Med 2009; 47:741-9. [PMID: 19523512 DOI: 10.1016/j.freeradbiomed.2009.06.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2009] [Revised: 05/08/2009] [Accepted: 06/08/2009] [Indexed: 12/27/2022]
Abstract
Hypoxia-inducible factor 1 (HIF-1) is a key regulator of tumor development. Recently, the tumor microenvironment, with the presence of tumor-associated macrophages (TAMs), has gained considerable interest. The mechanisms of macrophage/TAM migration as well as the role of HIF-1 in macrophages for tumor progression are still under debate. We present evidence that under normoxic conditions, nitric oxide (NO) promotes macrophage migration. The response was impaired in macrophages from leukocyte conditional HIF-1 alpha(-/-) mice. NO production and cell migration in response to cytokines were attenuated in macrophages from iNOS(-/-) mice, suggesting that iNOS-derived NO transmits cytokine signaling toward cell migration. We further identified the small GTPases Cdc42 and Rac1 as effectors of the NO-HIF axis to drive macrophage migration by modulating the actin cytoskeleton. Our observations strengthen the role of HIF-1 in macrophages as a target of NO in facilitating functional responses such as migration.
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Affiliation(s)
- Jie Zhou
- Institute of Biochemistry I/ZAFES, Faculty of Medicine, Goethe-University Frankfurt, 60590 Frankfurt am Main, Germany
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Nicola T, Hagood JS, James ML, Macewen MW, Williams TA, Hewitt MM, Schwiebert L, Bulger A, Oparil S, Chen YF, Ambalavanan N. Loss of Thy-1 inhibits alveolar development in the newborn mouse lung. Am J Physiol Lung Cell Mol Physiol 2009; 296:L738-50. [PMID: 19270178 DOI: 10.1152/ajplung.90603.2008] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Transforming growth factor (TGF)-beta mediates hypoxia-induced inhibition of alveolar development in the newborn lung. TGF-beta is regulated primarily at the level of activation of latent TGF-beta. Fibroblasts expressing Thy-1 (CD90) inhibit TGF-beta activation. We hypothesized that loss of Thy-1 due to hypoxia may be a mechanism by which hypoxia increases TGF-beta activation and that animals deficient in Thy-1 will simulate the effects of hypoxia on lung development. To determine if loss of Thy-1 occurred during hypoxia, non-transgenic (C57BL/6) wild-type (WT) mice exposed to hypoxia were evaluated for Thy-1 mRNA and protein. To determine if Thy-1 deficiency simulated hypoxia, WT and Thy-1 null (Thy-1(-/-)) mice were exposed to air or hypoxia from birth to 2 wk, the critical period of lung development, and lung histology, function, parameters related to TGF-beta signaling, and extracellular matrix protein content were measured. To test if the phenotype in Thy-1(-/-) mice was due to excessive TGF-beta signaling, measurements were also performed in Thy-1(-/-) mice administered TGF-beta neutralizing antibody (1D11). We observed that hypoxia reduced Thy-1 mRNA and Thy-1 staining in WT mice. Thy-1(-/-) mice had impaired alveolarization, increased TGF-beta signaling, reduced lung epithelial and endothelial cell proliferation but increased fibroblast proliferation, and increased collagen and elastin. Lung compliance was lower, and tissue but not airway resistance was higher in Thy-1(-/-) mice at 2 wk. Thy-1(-/-) mice given 1D11 had improved alveolar development and lung function. These data support the hypothesis that hypoxia, by reducing Thy-1, increases TGF-beta activation, and thereby inhibits normal alveolar development.
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Affiliation(s)
- Teodora Nicola
- Department of Pediatrics, University of Alabama at Birmingham, Birmingham, AL 35233, USA
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Zhang X, Wang X, Keshav V, Wang X, Johanas JT, Leisk GG, Kaplan DL. Dynamic culture conditions to generate silk-based tissue-engineered vascular grafts. Biomaterials 2009; 30:3213-23. [PMID: 19232717 DOI: 10.1016/j.biomaterials.2009.02.002] [Citation(s) in RCA: 106] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2009] [Accepted: 02/02/2009] [Indexed: 11/26/2022]
Abstract
Tissue engineering is an alternative approach for the preparation of small-diameter (<6mm) vascular grafts due to the potential to control thrombosis, anastomotic cellular hyperplasia and matrix production. This control also requires the maintenance of graft patency in vivo, appropriate mechanical properties and the formation of a functional endothelium. As a first step in generating such tissue-engineered vascular grafts (TEVGs), our objective was to develop a tissue-engineered construct that mimicked the structure of blood vessels using tubular electrospun silk fibroin scaffolds (ESFSs) with suitable mechanical properties. Human coronary artery smooth muscle cells (HCASMCs) and human aortic endothelial cells (HAECs) were sequentially seeded onto the luminal surface of the tubular scaffolds and cultivated under physiological pulsatile flow. The results demonstrated that TEVGs under dynamic flow conditions had better outcome than static culture controls in terms of cell proliferation and alignment, ECM production and cell phenotype based on transcript and protein level assessments. The metabolic activity of HCASMCs present in the TEGs indicated the advantage of dynamic flow over static culture in effective nutrient and oxygen distribution to the cells. A matrigel coating as a basement membrane mimic for ECM significantly improved endothelium coverage and retention under physiological shear forces. The results demonstrate the successful integration of vascular cells into silk electrospun tubular scaffolds as a step toward the development of a TEVG similar to native vessels in terms of vascular cell outcomes and mechanical properties.
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Affiliation(s)
- Xiaohui Zhang
- Department of Chemical and Biological Engineering, Tufts University, 4 Colby Street, Medford, MA 02155, USA
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