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Cortes B, Jambon-Barbara C, Cracowski JL, Khouri C. Validity, relevance and interpretation of pharmacovigilance disproportionality analyses. Bone 2023; 170:116685. [PMID: 36764505 DOI: 10.1016/j.bone.2023.116685] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2023] [Accepted: 01/24/2023] [Indexed: 02/11/2023]
Affiliation(s)
- Benjamin Cortes
- Pharmacy Department, Grenoble Alpes University Hospital, F-38000 Grenoble, France
| | - Clément Jambon-Barbara
- Pharmacovigilance Unit, Grenoble Alpes University Hospital, F-38000 Grenoble, France; Univ. Grenoble Alpes, HP2 Laboratory, Inserm U1300, Grenoble, France
| | - Jean-Luc Cracowski
- Pharmacovigilance Unit, Grenoble Alpes University Hospital, F-38000 Grenoble, France; Univ. Grenoble Alpes, HP2 Laboratory, Inserm U1300, Grenoble, France
| | - Charles Khouri
- Pharmacovigilance Unit, Grenoble Alpes University Hospital, F-38000 Grenoble, France; Univ. Grenoble Alpes, HP2 Laboratory, Inserm U1300, Grenoble, France.
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2
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Liu X, Liu Y, Tang L, Du C. Inhibition of farnesyl pyrophosphate synthase alleviates cardiomyopathy in diabetic rat. Cell Cycle 2023; 22:666-679. [PMID: 36310380 PMCID: PMC9980694 DOI: 10.1080/15384101.2022.2139126] [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: 05/30/2022] [Revised: 09/26/2022] [Accepted: 10/18/2022] [Indexed: 11/03/2022] Open
Abstract
This study investigated the effects of ibandronate (IBN) on cardiomyopathy remodeling in diabetic rats. A rat model of diabetic cardiomyopathy (DCM) was established by supplementing them with a high-calorie diet combined with a low dose of streptozotocin (STZ). The diabetic rats received IBN (5 µg/kg per day) or normal saline subcutaneously for 16 weeks. The hematoxylin and eosin (H&E) and Masson's trichrome staining were performed for evaluating the myocardial morphologies of the rats. Echocardiography and cardiac catheter were performed to assess their cardiac functional parameters. The protein levels of connective tissue growth factor (CTGF), farnesyl pyrophosphate synthase (FPPS), and mitogen-activated protein kinase (MAPK) were determined using Western blot analysis. RhoA activation was detected using a small GTP protease-linked immunosorbent assay (GLISA). The diabetic rats showed the development of moderate hyperglycemia, insulin resistance, hyperlipidemia, myocardial fibrosis, FPPS overexpression, cardiac systolic, and diastolic dysfunction. Inhibiting the FPPS could ameliorate myocardial hypertrophy and fibrosis. These anatomical findings were accompanied by a significant improvement in heart function. Furthermore, the inhibition of FPPS, the increased activation of RhoA, and phosphorylation of p38 and extracellular signal-regulated kinase (ERK)1/2 in DCM decreased significantly with the treatment of IBN. This study for the first time demonstrated that the upregulation of FPPS expression might be involved in diabetic myocardial remodeling in diabetes mellitus (DM). In addition, IBN might exert its inhibitory effects on myocardial tissue remodeling by suppressing the RhoA/ERK1/2 and RhoA/p38 MAPK pathways in DCM.
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Affiliation(s)
- Xiaowei Liu
- Department of Cardiology, Zhejiang Hospital, Hangzhou, P. R. China
| | - Yajun Liu
- The Second Clinical Medical College, Zhejiang Chinese Medical University, Hangzhou, P. R. China
| | - Lijiang Tang
- Department of Cardiology, Zhejiang Hospital, Hangzhou, P. R. China
| | - Changqing Du
- Department of Cardiology, Zhejiang Hospital, Hangzhou, P. R. China
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3
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Key Enzymes for the Mevalonate Pathway in the Cardiovascular System. J Cardiovasc Pharmacol 2021; 77:142-152. [PMID: 33538531 DOI: 10.1097/fjc.0000000000000952] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2020] [Accepted: 10/15/2020] [Indexed: 11/25/2022]
Abstract
ABSTRACT Isoprenylation is an important post-transcriptional modification of small GTPases required for their activation and function. Isoprenoids, including farnesyl pyrophosphate (FPP) and geranylgeranyl pyrophosphate, are indispensable for isoprenylation by serving as donors of a prenyl moiety to small G proteins. In the human body, isoprenoids are mainly generated by the mevalonate pathway (also known as the cholesterol-synthesis pathway). The hydroxymethylglutaryl coenzyme A reductase catalyzes the first rate-limiting steps of the mevalonate pathway, and its inhibitor (statins) are widely used as lipid-lowering agents. In addition, the FPP synthase is also of critical importance for the regulation of the isoprenoids production, for which the inhibitor is mainly used in the treatment of osteoporosis. Synthetic FPP can be further used to generate geranylgeranyl pyrophosphate and cholesterol. Recent studies suggest a role for isoprenoids in the genesis and development of cardiovascular disorders, such as pathological cardiac hypertrophy, fibrosis, endothelial dysfunction, and fibrotic responses of smooth-muscle cells. Furthermore, statins and FPP synthase inhibitors have also been applied for the management of heart failure and other cardiovascular diseases rather than their clinical use for hyperlipidemia or bone diseases. In this review, we focus on the function of several critical enzymes, including hydroxymethylglutaryl coenzyme A reductase, FPP synthase, farnesyltransferase, and geranylgeranyltransferase in the mevalonate pathway which are involved in regulating the generation of isoprenoids and isoprenylation of small GTPases, and their pathophysiological role in the cardiovascular system. Moreover, we summarize recent research into applications of statins and the FPP synthase inhibitors to treat cardiovascular diseases, rather than for their traditional indications respectively.
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Iacobellis G. Treating the Bone to Protect the Heart: Potential Newer Mechanisms and Targets. Am J Med Sci 2019; 357:451-452. [DOI: 10.1016/j.amjms.2019.02.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2019] [Accepted: 02/05/2019] [Indexed: 10/27/2022]
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5
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Seshacharyulu P, Rachagani S, Muniyan S, Siddiqui JA, Cruz E, Sharma S, Krishnan R, Killips BJ, Sheinin Y, Lele SM, Smith LM, Talmon GA, Ponnusamy MP, Datta K, Batra SK. FDPS cooperates with PTEN loss to promote prostate cancer progression through modulation of small GTPases/AKT axis. Oncogene 2019; 38:5265-5280. [PMID: 30914801 PMCID: PMC6597298 DOI: 10.1038/s41388-019-0791-9] [Citation(s) in RCA: 35] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2018] [Revised: 01/15/2019] [Accepted: 03/03/2019] [Indexed: 02/07/2023]
Abstract
Farnesyl diphosphate synthase (FDPS), a mevalonate pathway enzyme, is highly expressed in several cancers, including prostate cancer (PCa). To date, the mechanistic, functional, and clinical significance of FDPS in cancer remains unexplored. We evaluated the FDPS expression and its cancer-associated phenotypes using in vitro and in vivo methods in PTEN-deficient and sufficient human and mouse PCa cells and tumors. Interestingly, FDPS overexpression synergizes with PTEN deficiency in PTEN conditionally knockout mice (P < 0.05) and expressed significantly higher in human (P < 0.001) PCa tissues, cell lines, and murine tumoroids compared to respective controls. In silico analysis revealed that FDPS is associated with increasing Gleason score, PTEN functionally deficient status, and poor survival of PCa. Ectopic overexpression of FDPS promotes oncogenic phenotypes such as colony formation (P < 0.01) and proliferation (P < 0.01) through activation of AKT and ERK signaling by prenylating Rho A, Rho G, and CDC42 small GTPases. Of interest, knockdown of FDPS in PCa cells exhibits decreased colony growth and proliferation (P < 0.001) by modulating AKT and ERK pathways. Further, genetic and pharmacological inhibition of PI3K but not AKT reduced FDPS expression. Pharmacological targeting of FDPS by zoledronic acid (ZOL), which is already in clinics, exhibit reduced growth and clonogenicity of human and murine PCa cells (P < 0.01) and 3D tumoroids (P < 0.02) by disrupting AKT and ERK signaling through direct interference of small GTPases protein prenylation. Thus, FDPS plays an oncogenic role in PTEN-deficient PCa through GTPase/AKT axis. Identifying mevalonate pathway proteins could serve as a therapeutic target in PTEN dysregulated tumors.
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Affiliation(s)
| | - Satyanarayana Rachagani
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Sakthivel Muniyan
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Jawed A Siddiqui
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Eric Cruz
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Sunandini Sharma
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Ramakrishnan Krishnan
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Brigham J Killips
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Yuri Sheinin
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Subodh M Lele
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Lynette M Smith
- Department of Biostatistics, University of Nebraska Medical Center, Omaha, NE, USA
| | - Geoffrey A Talmon
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Moorthy P Ponnusamy
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
- Fred and Pamela Buffett Cancer Center, Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA
| | - Kaustubh Datta
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
- Fred and Pamela Buffett Cancer Center, Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA
| | - Surinder K Batra
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA.
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, USA.
- Fred and Pamela Buffett Cancer Center, Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, NE, USA.
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Liu XW, Jin HF, Du CQ, Tang LJ. Farnesyl Pyrophosphate Synthase Blocker Ibandronate Reduces Thoracic Aortic Fibrosis in Diabetic Rats. Am J Med Sci 2019; 357:323-332. [PMID: 30904048 DOI: 10.1016/j.amjms.2019.01.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2018] [Revised: 01/19/2019] [Accepted: 01/30/2019] [Indexed: 11/25/2022]
Abstract
BACKGROUND This study assessed the effect of ibandronate (IBN), a farnesyl pyrophosphate synthase (FPPS) inhibitor, on vascular remodeling in diabetic rats. METHODS A rat model of diabetes was induced by a high-fat and high-sugar diet combined with a small dose of streptozotocin. The diabetic rats received 5 µg/kg of ibandronate solution or normal saline subcutaneously every morning for 16 weeks. The morphology of the thoracic aorta was assessed by hematoxylin and eosin and Masson's trichrome staining techniques. Gene expression levels of connective tissue growth factor (CTGF) and FPPS were assessed by quantitative real-time polymerase chain reaction (qRT-PCR) analysis. CTGF and FPPS protein levels were determined by Western blotting analysis. RESULTS Rats with diabetes mellitus showed moderate hyperglycemia, insulin resistance, hyperlipidemia and thoracic aortic fibrosis. FPPS was significantly upregulated in the thoracic aorta from diabetic animals. Interestingly, IBN treatment for 16 weeks alleviated the diabetes-induced histopathologic changes in the thoracic aortic wall and reduced CTGF protein and mRNA levels. CONCLUSIONS These findings provided evidence that FPPS is involved in thoracic aortic fibrosis in diabetic rats. Meanwhile, IBN could alleviate vascular remodeling in diabetic animals.
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Affiliation(s)
- Xiao-Wei Liu
- Department of Cardiology, Zhejiang Hospital, Hangzhou, Zhejiang, China
| | - Hong-Feng Jin
- Department of Cardiology, Zhejiang Hospital, Hangzhou, Zhejiang, China
| | - Chang-Qing Du
- Department of Cardiology, Zhejiang Hospital, Hangzhou, Zhejiang, China.
| | - Li-Jiang Tang
- Department of Cardiology, Zhejiang Hospital, Hangzhou, Zhejiang, China.
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Pentz R, Kaun C, Thaler B, Stojkovic S, Lenz M, Krychtiuk KA, Zuckermann A, Huber K, Wojta J, Hohensinner PJ, Demyanets S. Cardioprotective cytokine interleukin-33 is up-regulated by statins in human cardiac tissue. J Cell Mol Med 2018; 22:6122-6133. [PMID: 30216659 PMCID: PMC6237563 DOI: 10.1111/jcmm.13891] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2018] [Revised: 07/24/2018] [Accepted: 08/08/2018] [Indexed: 01/20/2023] Open
Abstract
Interleukin (IL)‐33 is a member of the IL‐1 family and is able to act cardioprotective. The aim of this study was to investigate the regulation of IL‐33 by 3‐hydroxy‐3‐methylglutaryl‐coenzyme‐A (HMG‐CoA) reductase inhibitors (statins) and bisphosphonates (BPs) in human cardiac tissue. The lipophilic fluvastatin, simvastatin, atorvastatin, and lovastatin as well as the nitrogenous BPs alendronate and ibandronate, but not hydrophilic pravastatin increased IL‐33 mRNA and intracellular IL‐33 protein levels in both human adult cardiac myocytes (HACM) and fibroblasts (HACF). Additionally, fluvastatin reduced soluble ST2 secretion from HACM. IL‐33 was also up‐regulated by the general inhibitor of prenylation perillic acid, a RhoA kinase inhibitor Y‐27632, and by latrunculin B, but statin‐induced IL‐33 expression was inhibited by mevalonate, geranylgeranyl pyrophosphate (GGPP) and RhoA activator U‐46619. The IL‐33 promoter was 2.3‐fold more accessible in statin‐treated HACM compared to untreated cells (P = 0.037). In explanted hearts of statin‐treated patients IL‐33 protein was up‐regulated as compared with the hearts of non‐statin‐treated patients (P = 0.048). As IL‐33 was previously shown to exert cardioprotective effects, one could speculate that such up‐regulation of IL‐33 expression in human cardiac cells, which might happen mainly through protein geranylgeranylation, could be a novel mechanism contributing to known cardioprotective effects of statins and BPs.
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Affiliation(s)
- Richard Pentz
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Christoph Kaun
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Barbara Thaler
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Stefan Stojkovic
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Max Lenz
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Konstantin A Krychtiuk
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | | | - Kurt Huber
- 3rd Medical Department, Cardiology and Intensive Care Medicine, Wilhelminen Hospital, Vienna, Austria.,Medical Faculty, Sigmund Freud Private University, Vienna, Austria.,Ludwig Boltzmann Cluster for Cardiovascular Research, Vienna, Austria
| | - Johann Wojta
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Vienna, Austria.,Ludwig Boltzmann Cluster for Cardiovascular Research, Vienna, Austria.,Core Facilities, Medical University of Vienna, Vienna, Austria
| | - Philipp J Hohensinner
- Department of Internal Medicine II, Division of Cardiology, Medical University of Vienna, Vienna, Austria
| | - Svitlana Demyanets
- Department of Laboratory Medicine, Medical University of Vienna, Vienna, Austria
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8
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Yang Y, Rong X, Lv X, Jiang W, Yang Y, Lai D, Xu S, Fu G. Inhibition of mevalonate pathway prevents ischemia-induced cardiac dysfunction in rats via RhoA-independent signaling pathway. Cardiovasc Ther 2018; 35. [PMID: 28665545 DOI: 10.1111/1755-5922.12285] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 05/31/2017] [Accepted: 06/27/2017] [Indexed: 11/27/2022] Open
Abstract
AIM We previously demonstrated that anoxia-mediated Ca2+ handling dysfunction could be ameliorated through inhibition of mevalonate pathway via RhoA- and Ras-related mechanisms in H9c2 cells. In this study, we further explored whether inhibition of mevalonate pathway is associated with cardiac remodeling and dysfunction in ischemic cardiomyopathy, and discussed the possible role of Ras, Rac and RhoA in cardiac dysfunction. METHODS We investigated the role of mevalonate pathway in cardiac remodeling and cardiomyocyte Ca2+ handling proteins expression in a rat model of cardiac dysfunction due to myocardial infarction (MI). After MI, adult male Sprague-Dawley rats were treated with drugs that antagonize key components in mevalonate pathway, including 3-hydroxy-3-methylglutaryl-CoA reductase, farnesyl pyrophosphate synthase, and Rho-kinase for 10 weeks. The protein expression of ryanodine receptor 2 (RyR2), sarcoplasmic reticulum Ca2+ ATPase (SERCA) 2a, phospholamban (PLB), phospho-PLB at serine-16 (PSer16-PLB), FKBP12.6, and RhoA as well as RyR2 and FKBP12.6 mRNA levels was evaluated. RESULTS Rosuvastatin and alendronate treatment prevented myocardial remodeling, improved cardiac function and reduced infarct size. Furthermore, rosuvastatin and alendronate promoted an increase in the protein expression of SERCA2a and PSer16-PLB/PLB ratio as well as partially restored the RyR2 and FKBP12.6 gene and protein expression. Fasudil failed to exert these beneficial effects. CONCLUSIONS These findings indicate that mevalonate pathway inhibition by rosuvastatin and alendronate prevents cardiac remodeling and dysfunction possibly through RhoA-independent mechanisms.
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Affiliation(s)
- Ying Yang
- Department of Cardiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Xiqing Rong
- Department of Cardiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Xue Lv
- Department of Cardiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Wenbing Jiang
- Department of Cardiology, Wenzhou People's Hospital, Wenzhou, China
| | - Yuan Yang
- Department of Cardiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Dongwu Lai
- Department of Cardiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
| | - Shiming Xu
- Department of Cardiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China.,Institute of Translational Medicine, College of Medicine, Zhejiang University, Hangzhou, China
| | - Guosheng Fu
- Department of Cardiology, Sir Run Run Shaw Hospital, College of Medicine, Zhejiang University, Hangzhou, China
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Jiang D, Chen Y, Zhu Y, Fu G, Xu S. Expression of key enzymes in the mevalonate pathway are altered in monocrotaline-induced pulmonary arterial hypertension in rats. Mol Med Rep 2017; 16:9593-9600. [PMID: 29039598 DOI: 10.3892/mmr.2017.7798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2017] [Accepted: 08/31/2017] [Indexed: 11/06/2022] Open
Abstract
Pulmonary arterial hypertension (PAH) is a serious pulmonary vascular disease. The changes in the structure, function and metabolism of endothelial cells are some of the important features of PAH. Previous studies have demonstrated that the mevalonate pathway is important in cardiovascular remodeling. However, whether the mevalonate pathway is involved in the development of PAH remains to be elucidated. The present study aimed to investigate the expression pattern of mevalonate pathway-related enzymes in monocrotaline (MCT)-induced PAH. F344 rats were randomly divided into two groups (n=6/group): Control group rats were injected with a single dose of saline, and MCT group rats were injected with a single dose of MCT (60 mg/kg). After 4 weeks, the right ventricular systolic pressure (RVSP) was measured, and lung and pulmonary artery tissue samples were collected. It was demonstrated that the RVSP increased and pulmonary vascular remodeling was detected in the PAH group. The expression levels of the enzymes farnesyldiphosphate synthase farnesyltransferase α and geranylgeranyltransferase type I increased in the PAH group, which suggested that the mevalonate pathway may be involved in the pathological development of PAH.
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Affiliation(s)
- Dongmei Jiang
- Department of Cardiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310016, P.R. China
| | - Yu Chen
- Institute of Translational Medicine, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310029, P.R. China
| | - Yuxiang Zhu
- Institute of Translational Medicine, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310029, P.R. China
| | - Guosheng Fu
- Department of Cardiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310016, P.R. China
| | - Shiming Xu
- Department of Cardiology, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310016, P.R. China
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Duluc L, Ahmetaj-Shala B, Mitchell J, Abdul-Salam VB, Mahomed AS, Aldabbous L, Oliver E, Iannone L, Dubois OD, Storck EM, Tate EW, Zhao L, Wilkins MR, Wojciak-Stothard B. Tipifarnib prevents development of hypoxia-induced pulmonary hypertension. Cardiovasc Res 2017; 113:276-287. [PMID: 28395021 PMCID: PMC5408956 DOI: 10.1093/cvr/cvw258] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/23/2016] [Accepted: 01/03/2017] [Indexed: 12/13/2022] Open
Abstract
Aims RhoB plays a key role in the pathogenesis of hypoxia-induced pulmonary hypertension. Farnesylated RhoB promotes growth responses in cancer cells and we investigated whether inhibition of protein farnesylation will have a protective effect. Methods and results The analysis of lung tissues from rodent models and pulmonary hypertensive patients showed increased levels of protein farnesylation. Oral farnesyltransferase inhibitor tipifarnib prevented development of hypoxia-induced pulmonary hypertension in mice. Tipifarnib reduced hypoxia-induced vascular cell proliferation, increased endothelium-dependent vasodilatation and reduced vasoconstriction of intrapulmonary arteries without affecting cell viability. Protective effects of tipifarnib were associated with inhibition of Ras and RhoB, actin depolymerization and increased eNOS expression in vitro and in vivo. Farnesylated-only RhoB (F-RhoB) increased proliferative responses in cultured pulmonary vascular cells, mimicking the effects of hypoxia, while both geranylgeranylated-only RhoB (GG-RhoB), and tipifarnib had an inhibitory effect. Label-free proteomics linked F-RhoB with cell survival, activation of cell cycle and mitochondrial biogenesis. Hypoxia increased and tipifarnib reduced the levels of F-RhoB-regulated proteins in the lung, reinforcing the importance of RhoB as a signalling mediator. Unlike simvastatin, tipifarnib did not increase the expression levels of Rho proteins. Conclusions Our study demonstrates the importance of protein farnesylation in pulmonary vascular remodelling and provides a rationale for selective targeting of this pathway in pulmonary hypertension.
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Affiliation(s)
- Lucie Duluc
- Department of Medicine, Hammersmith Campus, Imperial College London, Du Cane Road, W120NN London, UK
| | - Blerina Ahmetaj-Shala
- National Heart and Lung Institute, Royal Brompton Campus, Imperial College London, Dovehouse Street, London SW3 6LY, UK
| | - Jane Mitchell
- National Heart and Lung Institute, Royal Brompton Campus, Imperial College London, Dovehouse Street, London SW3 6LY, UK
| | - Vahitha B Abdul-Salam
- Department of Medicine, Hammersmith Campus, Imperial College London, Du Cane Road, W120NN London, UK
| | - Abdul S Mahomed
- Department of Medicine, Hammersmith Campus, Imperial College London, Du Cane Road, W120NN London, UK
| | - Lulwah Aldabbous
- Department of Medicine, Hammersmith Campus, Imperial College London, Du Cane Road, W120NN London, UK
| | - Eduardo Oliver
- Department of Medicine, Hammersmith Campus, Imperial College London, Du Cane Road, W120NN London, UK
| | - Lucio Iannone
- Department of Medicine, Hammersmith Campus, Imperial College London, Du Cane Road, W120NN London, UK
| | - Olivier D Dubois
- Department of Medicine, Hammersmith Campus, Imperial College London, Du Cane Road, W120NN London, UK
| | - Elisabeth M Storck
- Department of Medicine, Hammersmith Campus, Imperial College London, Du Cane Road, W120NN London, UK.,Department of Chemistry, South Kensington Campus, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| | - Edward W Tate
- Department of Chemistry, South Kensington Campus, Imperial College London, Exhibition Road, London SW7 2AZ, UK
| | - Lan Zhao
- Department of Medicine, Hammersmith Campus, Imperial College London, Du Cane Road, W120NN London, UK
| | - Martin R Wilkins
- Department of Medicine, Hammersmith Campus, Imperial College London, Du Cane Road, W120NN London, UK
| | - Beata Wojciak-Stothard
- Department of Medicine, Hammersmith Campus, Imperial College London, Du Cane Road, W120NN London, UK
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Dai D, Wu H, Yang J, Shen S, Zhao C, Ding J, Hu S. Knock-down of farnesyl pyrophosphate synthase protects heart-derived H9c2 cells against hypoxia/reoxygenation-induced injury. Cell Biol Int 2017; 41:982-990. [PMID: 28544034 DOI: 10.1002/cbin.10795] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Accepted: 05/19/2017] [Indexed: 01/08/2023]
Affiliation(s)
- Dongpu Dai
- Institute of Cardiology; College of Medicine; The First Affiliated Hospital; Zhejiang University; Hangzhou China
| | - Huandong Wu
- Institute of Cardiology; College of Medicine; The First Affiliated Hospital; Zhejiang University; Hangzhou China
| | - Jian Yang
- Institute of Cardiology; College of Medicine; The First Affiliated Hospital; Zhejiang University; Hangzhou China
| | - Shizhen Shen
- College of Medicine; Zhejiang University; Hangzhou China
| | - Chenze Zhao
- Institute of Cardiology; College of Medicine; The First Affiliated Hospital; Zhejiang University; Hangzhou China
| | - Jie Ding
- Institute of Cardiology; College of Medicine; The First Affiliated Hospital; Zhejiang University; Hangzhou China
| | - Shenjiang Hu
- Institute of Cardiology; College of Medicine; The First Affiliated Hospital; Zhejiang University; Hangzhou China
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12
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Protein prenylation and human diseases: a balance of protein farnesylation and geranylgeranylation. SCIENCE CHINA-LIFE SCIENCES 2015; 58:328-35. [DOI: 10.1007/s11427-015-4836-1] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 01/23/2015] [Indexed: 01/30/2023]
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13
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CHANG-QING DU, XIAO-WEI LIU, GUANG-ZHONG ZENG, HONG-FENG JIN, LI-JIANG TANG. Inhibition of farnesyl pyrophosphate synthase attenuates angiotensin II-induced fibrotic responses in vascular smooth muscle cells. Int J Mol Med 2015; 35:1767-72. [DOI: 10.3892/ijmm.2015.2166] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2015] [Accepted: 03/26/2015] [Indexed: 11/06/2022] Open
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Lentiviral-mediated silencing of farnesyl pyrophosphate synthase through RNA interference in mice. BIOMED RESEARCH INTERNATIONAL 2015; 2015:914026. [PMID: 25688370 PMCID: PMC4320928 DOI: 10.1155/2015/914026] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/23/2014] [Revised: 12/06/2014] [Accepted: 01/02/2015] [Indexed: 11/18/2022]
Abstract
Farnesyl pyrophosphate synthase (FPPS) plays a vital role in the mevalonate pathway and has been shown to be involved in hypertrophy and cardiovascular diseases. Lentivirus-mediated RNA interference (RNAi) to knock down a gene of interest has become a promising new tool for the establishment of transgenic animals. The interfering fragment, named pLVT202, was chosen from cardiomyocytes tested in vitro and was microinjected into the perivitelline space of zygotes from C57BL/6J mice via a lentivirus vehicle; 20 were identified as carrying copies of the transgene using the polymerase chain reaction (PCR). Real-time PCR and western blotting analysis showed that FPPS was downregulated in multiple tissues in the transgenic mice. The transgenic mouse model provides a novel means of studying the gene function of FPPS.
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15
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Xu N, Guan S, Chen Z, Yu Y, Xie J, Pan FY, Zhao NW, Liu L, Yang ZZ, Gao X, Xu B, Li CJ. The alteration of protein prenylation induces cardiomyocyte hypertrophy through Rheb-mTORC1 signalling and leads to chronic heart failure. J Pathol 2015; 235:672-85. [DOI: 10.1002/path.4480] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2014] [Revised: 10/25/2014] [Accepted: 11/05/2014] [Indexed: 12/16/2022]
Affiliation(s)
- Na Xu
- Ministry of Education Key Laboratory of Model Animals for Disease Study; Model Animal Research Centre and Medical School of Nanjing University, National Resource Centre for Mutant Mice; Nanjing People's Republic of China
| | - Shan Guan
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology; College of Life Science, Nanjing Normal University; Nanjing People's Republic of China
| | - Zhong Chen
- Ministry of Education Key Laboratory of Model Animals for Disease Study; Model Animal Research Centre and Medical School of Nanjing University, National Resource Centre for Mutant Mice; Nanjing People's Republic of China
| | - Yang Yu
- State Key Laboratory of Reproductive Biology; Institute of Zoology/Chinese Academy of Sciences; Beijing People's Republic of China
| | - Jun Xie
- Department of Cardiology; Affiliated Drum Tower Hospital of Nanjing University Medical School; Nanjing People's Republic of China
| | - Fei-Yan Pan
- Jiangsu Key Laboratory for Molecular and Medical Biotechnology; College of Life Science, Nanjing Normal University; Nanjing People's Republic of China
| | - Ning-Wei Zhao
- Biomedical Research Laboratory; Shimadzu (China) Co. Ltd; Shanghai People's Republic of China
| | - Li Liu
- Department of Geriatrics; First Affiliated Hospital with Nanjing Medical University; Nanjing People's Republic of China
| | - Zhong-Zhou Yang
- Ministry of Education Key Laboratory of Model Animals for Disease Study; Model Animal Research Centre and Medical School of Nanjing University, National Resource Centre for Mutant Mice; Nanjing People's Republic of China
| | - Xiang Gao
- Ministry of Education Key Laboratory of Model Animals for Disease Study; Model Animal Research Centre and Medical School of Nanjing University, National Resource Centre for Mutant Mice; Nanjing People's Republic of China
| | - Biao Xu
- Department of Cardiology; Affiliated Drum Tower Hospital of Nanjing University Medical School; Nanjing People's Republic of China
| | - Chao-Jun Li
- Ministry of Education Key Laboratory of Model Animals for Disease Study; Model Animal Research Centre and Medical School of Nanjing University, National Resource Centre for Mutant Mice; Nanjing People's Republic of China
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16
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Liang NL, Men R, Zhu Y, Yuan C, Wei Y, Liu X, Yang L. Visfatin: an adipokine activator of rat hepatic stellate cells. Mol Med Rep 2014; 11:1073-8. [PMID: 25351242 DOI: 10.3892/mmr.2014.2795] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2013] [Accepted: 09/29/2014] [Indexed: 02/05/2023] Open
Abstract
The present study was conducted to investigate the effects of visfatin on the activation of hepatic stellate cells (HSC) and the possible underlying mechanism. HSC were isolated from the livers of Sprague‑Dawley rats by in situ perfusion of collagenase and pronase and a single‑step density Nycodenz gradient. The culture‑activated cells were serum‑starved and incubated with different concentrations of recombinant visfatin (0, 25, 50, 100 or 200 ng/ml) for 24 h. The expression of α‑smooth muscle actin (α‑SMA), collagen types I and III and connective tissue growth factor (CTGF) were then measured by reverse transcription‑quantitative polymerase chain reaction (RT‑qPCR) and western blot analysis. The results demonstrated that 100 and 200 ng/ml concentrations of visfatin induced the expression of α‑SMA in culture‑activated rat HSC, which was accompanied by a significant increase in collagen types I and III, as confirmed by western blot and RT‑qPCR analyses. In addition, treatment of the HSC with certain concentrations of visfatin upregulated the expression of CTGF. These findings suggested that visfatin activated HSC and induced the production of collagen types I and III.
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Affiliation(s)
- Ning-Lin Liang
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Ruoting Men
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yongjun Zhu
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Cong Yuan
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Yan Wei
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Xiaojing Liu
- Laboratory of Cardiovascular Diseases, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
| | - Li Yang
- Department of Gastroenterology, West China Hospital, Sichuan University, Chengdu, Sichuan 610041, P.R. China
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Li Z, Bi X, Wang M, Zhang J, Song J, Shen X, Han J, Fu G, Ye Y. Inhibition of farnesyl pyrophosphate synthase prevents angiotensin II-induced cardiac fibrosis in vitro. Clin Exp Immunol 2014; 176:429-37. [PMID: 24527834 DOI: 10.1111/cei.12282] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 01/29/2014] [Indexed: 12/19/2022] Open
Abstract
Farnesyl pyrophosphate synthase (FPPS)-catalysed isoprenoid intermediates are important for the activation of Ras homologue gene family, member A (RhoA) in angiotensin (Ang) II-induced cardiac fibrosis. This study was designed to investigate the specific role of FPPS in the development of cardiac fibrosis. We demonstrated that FPPS expression was elevated in both in-vivo and in-vitro models of Ang II-mediated cardiac fibrosis. FPPS inhibition by zolendronate and FPPS knock-down by a silencing lentivirus decreased the expression of cardiac fibrosis marker genes, including collagen I, collagen III and transforming growth factor (TGF)-β1. FPPS inhibition was reversed by geranylgeraniol (GGOH) and mimicked by RhoA knock-down with siRhoA. The antagonistic effect of GGOH on the zolendronate-mediated modulation of RhoA activation in Ang II-stimulated cardiac fibroblasts was demonstrated by a pull-down assay. Furthermore, FPPS knock-down also prevented RhoA activation by Ang II in vitro. In conclusion, FPPS and RhoA may be part of a signalling pathway that plays an important role in Ang II-induced cardiac fibrosis in vitro.
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Affiliation(s)
- Z Li
- Department of Cardiology, Sir Run Run Shaw Hospital, Hangzhou, Zhejiang Province, China
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18
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Effect of farnesyltransferase inhibition on cardiac remodeling in spontaneously hypertensive rats. Int J Cardiol 2013; 168:3340-7. [DOI: 10.1016/j.ijcard.2013.04.038] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Revised: 02/15/2013] [Accepted: 04/06/2013] [Indexed: 12/31/2022]
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Du CQ, Yang L, Yang J, Han J, Hu XS, Wu T, Hu SJ. Inhibition of farnesyl pyrophosphate synthase prevents norepinephrine-induced fibrotic responses in vascular smooth muscle cells from spontaneously hypertensive rats. Hypertens Res 2013; 37:26-34. [PMID: 23985701 DOI: 10.1038/hr.2013.96] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2013] [Revised: 05/15/2013] [Accepted: 06/04/2013] [Indexed: 11/09/2022]
Abstract
Both norepinephrine (NE) and connective tissue growth factor (CTGF) contribute to vascular fibrosis during hypertension. Recent studies indicate that farnesyl pyrophosphate synthase (FPPS) plays an important role in cardiac remodeling in hypertension. However, the role of FPPS in NE-induced fibrotic responses and related molecular mechanisms is unknown. Vascular smooth muscle cells (VSMCs) from spontaneously hypertensive rats (SHR) and Wistar-Kyoto rats (WKY) were stimulated with NE. The fibrotic responses were assessed by measuring CTGF, hydroxyproline (hyp), and α-1 procollagen I levels using Western blot, a hydroxyproline test kit, and real-time quantitative PCR assays, respectively. Ras activity was determined by a pull-down assay using a Ras activation assay kit and detected by Western blot. NE dose-dependently increased fibrosis in SHR-VSMCs, and this increase was significantly reduced by ibandronate, an inhibitor of FPPS. The addition of farnesol, but not geranylgeraniol, partially reversed the inhibitory effects of ibandronate. Furthermore, the anti-fibrotic effects of ibandronate could be mimicked by FTI-276 but not by GGTI-286. A pull-down assay showed that ibandronate reduced the NE-induced Ras activation. Moreover, ibandronate inhibited the NE-induced activation of p38, JNK, and ERK1/2. Only SB203580 (specific inhibitor of p38) diminished the NE-induced CTGF production. These results demonstrated that inhibiting FPPS prevents NE-induced fibrotic responses in SHR-VSMCs and that the Ras kinase and p38 pathways were the underlying mechanisms involved in this process.
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Affiliation(s)
- Chang-Qing Du
- 1] Institute of Cardiology, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, P.R. China [2] Department of Cardiology, Zhejiang Hospital, Hangzhou, Zhejiang, P.R. China
| | - Lin Yang
- Institute of Cardiology, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, P.R. China
| | - Jian Yang
- Institute of Cardiology, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, P.R. China
| | - Jie Han
- Institute of Cardiology, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, P.R. China
| | - Xiao-Sheng Hu
- Institute of Cardiology, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, P.R. China
| | - Tao Wu
- Institute of Cardiology, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, P.R. China
| | - Shen-Jiang Hu
- Institute of Cardiology, the First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, P.R. China
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20
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Inhibition of farnesyl pyrophosphate synthase attenuates angiotensin II-induced cardiac hypertrophy and fibrosis in vivo. Int J Biochem Cell Biol 2012; 45:657-66. [PMID: 23277274 DOI: 10.1016/j.biocel.2012.12.016] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Revised: 11/19/2012] [Accepted: 12/07/2012] [Indexed: 12/28/2022]
Abstract
Farnesyl pyrophosphate synthase (FPPS), as a key branchpoint of the mevalonate pathway, catalyzes the synthesis of isoprenoid intermediates. The isoprenoid intermediates are needed for protein isoprenylation to participate in cardiac remodeling. We have previously demonstrated that both knockdown of FPPS with small interfering RNA and inhibition of FPPS by alendronate could prevent Ang II-induced hypertrophy in cultured cardiomyocytes. In this study, we evaluated the effects of FPPS inhibition in Ang II-mediated cardiac hypertrophy and fibrosis in vivo. Wild type mice were separately treated with saline, Ang II (2.88 mg/kg per day), FPPS inhibitor alendronate (0.1 mg/kg per day), or the combination of Ang II (2.88 mg/kg per day) and alendronate (0.1 mg/kg per day) for 4 weeks. The results showed that Ang II increased FPPS expression, and the increases of Ang II-induced synthesis of the isoprenoid intermediates, FPP and GGPP, were significantly inhibited by FPPS inhibitor. In the meantime, FPPS inhibition attenuated Ang II-mediated cardiac hypertrophy and fibrosis as indexed by the heart weight to body weight ratio, echocardiographic parameters, histological examinations and expression of ANP and BNP mRNA. Furthermore, it was also found that FPPS inhibitor attenuated Ang II-induced increases of RhoA activity and p-38 MAPK phosphorylation and TGF-β1 mRNA expression. In conclusion, FPPS might play an important role in Ang II-induced cardiac hypertrophy and fibrosis in vivo, at least in part through RhoA, p-38 MAPK and TGF-β1.
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Yang J, Mou Y, Wu T, Ye Y, Jiang JC, Zhao CZ, Zhu HH, Du CQ, Zhou L, Hu SJ. Cardiac-specific overexpression of farnesyl pyrophosphate synthase induces cardiac hypertrophy and dysfunction in mice. Cardiovasc Res 2012. [DOI: 10.1093/cvr/cvs347] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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22
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Dozier JK, Distefano MD. An enzyme-coupled continuous fluorescence assay for farnesyl diphosphate synthases. Anal Biochem 2011; 421:158-63. [PMID: 22085443 DOI: 10.1016/j.ab.2011.10.038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2011] [Revised: 10/03/2011] [Accepted: 10/21/2011] [Indexed: 01/01/2023]
Abstract
Farnesyl diphosphate synthase (FDPS) catalyzes the conversion of isopentenyl diphosphate and dimethylallyl diphosphate to farnesyl diphosphate, a crucial metabolic intermediate in the synthesis of cholesterol, ubiquinone, and prenylated proteins; consequently, much effort has gone into developing inhibitors that target FDPS. Currently most FDPS assays either use radiolabeled substrates and are discontinuous or monitor pyrophosphate release and not farnesyl diphosphate (FPP) creation. Here we report the development of a continuous coupled enzyme assay for FDPS activity that involves the subsequent incorporation of the FPP product of that reaction into a peptide via the action of protein farnesyltransferase (PFTase). By using a dansylated peptide whose fluorescence quantum yield increases upon farnesylation, the rate of FDPS-catalyzed FPP production can be measured. We show that this assay is more sensitive than existing coupled assays, that it can be used to conveniently monitor FDPS activity in a 96-well plate format, and that it can reproduce IC(50) values for several previously reported FDPS inhibitors. This new method offers a simple, safe, and continuous method to assay FDPS activity that should greatly facilitate the screening of inhibitors of this important target.
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Affiliation(s)
- Jonathan K Dozier
- Department of Chemistry, University of Minnesota, Minneapolis, MN 55455, USA
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23
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Jackson P, Hougaard KS, Vogel U, Wu D, Casavant L, Williams A, Wade M, Yauk CL, Wallin H, Halappanavar S. Exposure of pregnant mice to carbon black by intratracheal instillation: toxicogenomic effects in dams and offspring. Mutat Res 2011; 745:73-83. [PMID: 22001195 DOI: 10.1016/j.mrgentox.2011.09.018] [Citation(s) in RCA: 84] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2011] [Accepted: 09/27/2011] [Indexed: 01/05/2023]
Abstract
Exposure to nanomaterials (NM) during sensitive developmental stages may predispose organisms to diseases later in life. However, direct translocation of NM from mother to fetus through the placenta is limited. The present study tests the hypothesis that pulmonary exposure to NM and NM-induced response, such as inflammation during gestation, leads to secondary effects in the fetus. Time-mated C57BL/6BomTac mice were exposed by intratracheal instillation to vehicle (Nanopure water) or one of three concentrations (2.75, 13.5 or 67 μg in 40 μl Nanopure water) of carbon black Printex 90 (CB) on gestational days 7, 10, 15 and 18, to final cumulative doses of 11, 54 or 268 μg/animal. Samples from a subset of male and female newborns were collected on postnatal day 2 (4 days after the last maternal exposure) and from dams 26 to 27 days post-exposure (post-weaning period). Histopathology, DNA microarrays, pathway-specific RT-PCR arrays, focussed RT-PCR, and tissue protein analysis were employed to characterize pulmonary response in dams exposed to CB during pregnancy. Hepatic gene expression in newborns was interpreted in light of the observed biological responses and gene expression changes arising in the lungs of dams following CB exposure. Although retention of CB particles was observed in dams from both the medium and the high dose groups, neutrophil-marked inflammation and altered expression of several cytokines and chemokines, both at the transcriptional and tissue protein levels, was significant only in the high dose group. Analysis of newborn livers by DNA microarrays revealed that female offspring were more sensitive to maternal exposure than male offspring. Cellular signalling, inflammation, cell cycle and lipid metabolism were among the biological pathways affected in female offspring. Males, however, responded with subtle changes in metabolism-related genes. Further investigation is required to determine the long-term health consequences of the gene expression changes in offspring and response to environmental stresses.
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Affiliation(s)
- Petra Jackson
- National Research Centre for the Working Environment, Copenhagen DK-2100, Denmark
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Han J, Jiang DM, Du CQ, Hu SJ. Alteration of enzyme expressions in mevalonate pathway: possible role for cardiovascular remodeling in spontaneously hypertensive rats. Circ J 2011; 75:1409-17. [PMID: 21467659 DOI: 10.1253/circj.cj-10-1101] [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: 11/09/2022]
Abstract
BACKGROUND The mevalonate pathway is an important metabolic pathway that plays a key role in multiple cellular processes. The aim of this study was to define whether the enzyme expression in mevalonate pathway changes during cardiovascular remodelling in spontaneously hypertensive rats (SHR). METHODS AND RESULTS Hearts and thoracic aortas were removed for the study of cardiovascular remodeling in SHR and Wistar-Kyoto rats (WKY). The protein expression of the enzymes in hearts, aortas and livers was analyzed by western blot. The histological measurements showed that the mass and the size of cardiomyocytes, the media thickness and the media cross-sectional area (MCSA) of the thoracic aorta were all increased in SHR since 3 weeks of age. In the heart, there was overexpression of some enzymes, including 3-hydroxy-3-methylglutaryl-coenzyme A reductase (HMGR), farnesyl diphosphate synthase (FDPS), and geranylgeranyltransferase type I (GGTase-I), and downregulation of squalene synthetase (SQS) in SHR since 3 weeks of age. In the aorta, besides similar expressions of HMGR, SQS, FDPS and GGTase-I as in the heart, there was upregulation of farnesyltransferase α at 16 and 25 weeks of age and of farnesyltransferase β in 25-weeks-old SHR. Western blot demonstrated overexpression of HMGR and downregulation of SQS in SHR livers at all ages tested. CONCLUSIONS The cardiovascular remodeling of SHR preceded the development of hypertension, and altered expression of several key enzymes in the mevalonate pathway may play a potential pathophysiological role in cardiovascular remodeling.
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Affiliation(s)
- Jie Han
- Institute of Cardiology, The First Affiliated Hospital, College of Medicine, Zhejiang University, Hangzhou, Zhejiang, PR China
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Establishment of transgenic mice carrying the gene for farnesyl pyrophosphate synthase. Biotechnol Lett 2010; 33:687-92. [PMID: 21184137 DOI: 10.1007/s10529-010-0493-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2010] [Accepted: 12/07/2010] [Indexed: 10/18/2022]
Abstract
Farnesyl pyrophosphate synthase (FPPS) is an essential enzyme in the mevalonate pathway and might be relevant to hypertension and other cardiovascular diseases. FPPS transgenic mice were produced by microinjecting a construct with the FPPS gene into fertilized eggs derived from an inbred C57BL/6 strain. Three mice were identified as carrying copies of the transgene using the PCR. Reverse transcription PCR and Western blotting showed that the transgene was expressed in heart, liver, lung, ear, brain, thymus, and blood vessels in the transgenic mouse. Pathological analysis (hematoxylin and eosin staining) showed that FPPS expression did not cause obvious pathological changes in multiple tissues of 6-week-old transgenic mice. This FPPS transgenic mouse model, may therefore, facilitate the investigation of the biological functions of FPPS in vivo.
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Chen GP, Li L, Yang Y, Fu M, Yao L, Wu T, Zhang XQ, Hu SJ. Chronic inhibition of farnesyl pyrophosphate synthase improves endothelial function in spontaneously hypertensive rats. Biochem Pharmacol 2010; 80:1684-9. [DOI: 10.1016/j.bcp.2010.08.015] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2010] [Revised: 08/18/2010] [Accepted: 08/19/2010] [Indexed: 10/19/2022]
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Knockdown of farnesylpyrophosphate synthase prevents angiotensin II-mediated cardiac hypertrophy. Int J Biochem Cell Biol 2010; 42:2056-64. [DOI: 10.1016/j.biocel.2010.09.010] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2010] [Revised: 08/29/2010] [Accepted: 09/20/2010] [Indexed: 11/18/2022]
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