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Li W, Luo J, Peng F, Liu R, Bai X, Wang T, Zhang X, Zhu J, Li XY, Wang Z, Liu W, Wang J, Zhang L, Chen X, Xue T, Ding C, Wang C, Jiao L. Spatial metabolomics identifies lipid profiles of human carotid atherosclerosis. Atherosclerosis 2023; 364:20-28. [PMID: 36459728 DOI: 10.1016/j.atherosclerosis.2022.11.019] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 10/31/2022] [Accepted: 11/23/2022] [Indexed: 11/26/2022]
Abstract
BACKGROUND AND AIMS Carotid atherosclerosis is an important cause of ischemic stroke. Lipids play a key role in the progression of atherosclerosis. To date, the spatial lipid profile of carotid atherosclerotic plaques related to histology has not been systematically investigated. METHODS Carotid atherosclerosis samples from 12 patients were obtained and classified into four classical pathological stages (preatheroma, atheroma, fibroatheroma and complicated lesion) by histological staining. Desorption electrospray ionization-mass spectrometry imaging (DESI-MSI) was used to investigate the lipid profile of carotid atherosclerosis, and correlated it with histological information. Bioinformatics technology was used to process MSI data among different pathological stages of atherosclerosis lesions. RESULTS A total of 55 lipids (26 throughout cross-section regions [TCSRs], 13 in lipid-rich regions [LRRs], and 16 in collagen-rich regions [CRRs]) were initially identified in carotid plaque from one patient. Subsequently, 32 of 55 lipids (12 in TCSRs, eight in LRRs, and 12 in CRRs) were further screened in 11 patients. Pathway enrichment analysis showed that multiple metabolic pathways, such as fat digestion and absorption, cholesterol metabolism, lipid and atherosclerosis, were enriched in TCSRs; sphingolipid signaling pathway, necroptosis pathway were enriched in LRRs; and glycerophospholipid metabolism, ether lipid metabolism pathway were mainly enriched in CRRs. CONCLUSIONS This study comprehensively showed the spatial lipid metabolism footprint in human carotid atherosclerotic plaques. The lipid profiles and related metabolism pathways in three regions of plaque with disease progression were different markedly, suggesting that the different metabolic mechanisms in these regions of carotid plaque may be critical in atherosclerosis progression.
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Affiliation(s)
- Wei Li
- Department of Stroke Center, Central Hospital Affiliated to Shandong First Medical University, China; Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Jichang Luo
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Fangda Peng
- National Center for Occupational Safety and Health, NHC (National Center for Occupational Medicine of Coal Industry, NHC), Beijing, China
| | - Ruiting Liu
- Department of Neurology, Liaocheng People's Hospital, Liaocheng, Shandong Province, China
| | - Xuesong Bai
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Tao Wang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Xiao Zhang
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Junge Zhu
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Xu-Ying Li
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Zhanjun Wang
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China
| | - Wubin Liu
- National Center for Occupational Safety and Health, NHC (National Center for Occupational Medicine of Coal Industry, NHC), Beijing, China
| | - Jiyue Wang
- Department of Neurosurgery, Liaocheng People's Hospital, Liaocheng, Shandong Province, China
| | - Liyong Zhang
- Department of Neurosurgery, Liaocheng People's Hospital, Liaocheng, Shandong Province, China
| | - Xianyang Chen
- Zhongguancun Biological and Medical Big Data Center, Beijing, China; BaoFeng Key Laboratory of Genetics and Metabolism, Beijing, China
| | - Teng Xue
- BaoFeng Key Laboratory of Genetics and Metabolism, Beijing, China; Zhongyuanborui Key Laborotory of Genetics and Metabolism, Guangdong-Macao In-depth Cooperation Zone in Hengqin, China
| | - Chunguang Ding
- National Center for Occupational Safety and Health, NHC (National Center for Occupational Medicine of Coal Industry, NHC), Beijing, China.
| | - Chaodong Wang
- Department of Neurology, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China; National Clinical Research Center for Geriatric Diseases, Beijing, China.
| | - Liqun Jiao
- Department of Neurosurgery, Xuanwu Hospital, Capital Medical University, Beijing, 100053, China; China International Neuroscience Institute (China-INI), Beijing, 100053, China; Department of Interventional Neuroradiology, Xuanwu Hospital, Capital Medical University, Beijing, China.
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Lacroux J, Atteia A, Brugière S, Couté Y, Vallon O, Steyer JP, van Lis R. Proteomics unveil a central role for peroxisomes in butyrate assimilation of the heterotrophic Chlorophyte alga Polytomella sp. Front Microbiol 2022; 13:1029828. [PMID: 36353459 PMCID: PMC9637915 DOI: 10.3389/fmicb.2022.1029828] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/27/2022] [Accepted: 10/05/2022] [Indexed: 09/08/2023] Open
Abstract
Volatile fatty acids found in effluents of the dark fermentation of biowastes can be used for mixotrophic growth of microalgae, improving productivity and reducing the cost of the feedstock. Microalgae can use the acetate in the effluents very well, but butyrate is poorly assimilated and can inhibit growth above 1 gC.L-1. The non-photosynthetic chlorophyte alga Polytomella sp. SAG 198.80 was found to be able to assimilate butyrate fast. To decipher the metabolic pathways implicated in butyrate assimilation, quantitative proteomics study was developed comparing Polytomella sp. cells grown on acetate and butyrate at 1 gC.L-1. After statistical analysis, a total of 1772 proteins were retained, of which 119 proteins were found to be overaccumulated on butyrate vs. only 46 on acetate, indicating that butyrate assimilation necessitates additional metabolic steps. The data show that butyrate assimilation occurs in the peroxisome via the β-oxidation pathway to produce acetyl-CoA and further tri/dicarboxylic acids in the glyoxylate cycle. Concomitantly, reactive oxygen species defense enzymes as well as the branched amino acid degradation pathway were strongly induced. Although no clear dedicated butyrate transport mechanism could be inferred, several membrane transporters induced on butyrate are identified as potential condidates. Metabolic responses correspond globally to the increased needs for central cofactors NAD, ATP and CoA, especially in the peroxisome and the cytosol.
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Affiliation(s)
| | - Ariane Atteia
- MARBEC, Univ Montpellier, CNRS, Ifremer, IRD, Sète, France
| | - Sabine Brugière
- Univ Grenoble Alpes, CEA, INSERM, UMR BioSanté U1292, CNRS, CEA, Grenoble, France
| | - Yohann Couté
- Univ Grenoble Alpes, CEA, INSERM, UMR BioSanté U1292, CNRS, CEA, Grenoble, France
| | - Olivier Vallon
- Institut de Biologie Physico-Chimique, UMR7141 CNRS-Sorbonne Université, Paris, France
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Liu P, Zhu W, Chen C, Yan B, Zhu L, Chen X, Peng C. The mechanisms of lysophosphatidylcholine in the development of diseases. Life Sci 2020; 247:117443. [DOI: 10.1016/j.lfs.2020.117443] [Citation(s) in RCA: 94] [Impact Index Per Article: 23.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Revised: 02/11/2020] [Accepted: 02/17/2020] [Indexed: 02/07/2023]
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Burdine RD, Preston CC, Leonard RJ, Bradley TA, Faustino RS. Nucleoporins in cardiovascular disease. J Mol Cell Cardiol 2020; 141:43-52. [PMID: 32209327 DOI: 10.1016/j.yjmcc.2020.02.010] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2019] [Revised: 02/19/2020] [Accepted: 02/25/2020] [Indexed: 01/01/2023]
Abstract
Cardiovascular disease is a pressing health problem with significant global health, societal, and financial burdens. Understanding the molecular basis of polygenic cardiac pathology is thus essential to devising novel approaches for management and treatment. Recent identification of uncharacterized regulatory functions for a class of nuclear envelope proteins called nucleoporins offers the opportunity to understand novel putative mechanisms of cardiac disease development and progression. Consistent reports of nucleoporin deregulation associated with ischemic and dilated cardiomyopathies, arrhythmias and valvular disorders suggests that nucleoporin impairment may be a significant but understudied variable in cardiopathologic disorders. This review discusses and converges existing literature regarding nuclear pore complex proteins and their association with cardiac pathologies, and proposes a role for nucleoporins as facilitators of cardiac disease.
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Affiliation(s)
- Ryan D Burdine
- Genetics and Genomics Group, Sanford Research, 2301 E. 60(th) Street N., Sioux Falls, SD 57104, United States of America; School of Health Sciences, University of South Dakota, 414 E Clark St, Vermillion, SD 57069, United States of America
| | - Claudia C Preston
- Genetics and Genomics Group, Sanford Research, 2301 E. 60(th) Street N., Sioux Falls, SD 57104, United States of America
| | - Riley J Leonard
- Genetics and Genomics Group, Sanford Research, 2301 E. 60(th) Street N., Sioux Falls, SD 57104, United States of America
| | - Tyler A Bradley
- Genetics and Genomics Group, Sanford Research, 2301 E. 60(th) Street N., Sioux Falls, SD 57104, United States of America
| | - Randolph S Faustino
- Genetics and Genomics Group, Sanford Research, 2301 E. 60(th) Street N., Sioux Falls, SD 57104, United States of America; Department of Pediatrics, Sanford School of Medicine of the University of South Dakota, 1400 W. 22(nd) Street, Sioux Falls, SD 57105, United States of America.
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Toita R, Asai D, Otani K, Kawano T, Murata M, Kang J. Suppression of Lysophosphatidylcholine‐Induced Human Aortic Smooth Muscle Cell Calcification by Protein Kinase A Inhibition. Lipids 2019; 54:465-470. [DOI: 10.1002/lipd.12178] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2019] [Revised: 05/31/2019] [Accepted: 06/03/2019] [Indexed: 11/07/2022]
Affiliation(s)
- Riki Toita
- Biomedical Research InstituteNational Institute of Advanced Industrial Science and Technology (AIST) 1‐8‐31 Midorigaoka, Ikeda, Osaka, 563‐8577 Japan
- AIST‐Osaka University Advanced Photonics and Biosensing Open Innovation Laboratory 2‐1 Yamadaoka, Suita, Osaka, 565‐0871 Japan
| | - Daisuke Asai
- Department of MicrobiologySt. Marianna University School of Medicine 2‐16‐1 Sugao, Miyamae, Kawasaki, 216‐8511 Japan
| | - Kentaro Otani
- Department of Regenerative Medicine and Tissue EngineeringNational Cerebral and Cardiovascular Center Research Institute 5‐7‐1 Fujishiro‐dai, Suita, Osaka, 565‐8565 Japan
| | - Takahito Kawano
- Center for Advanced Medical InnovationKyushu University 3‐1‐1 Maidashi, Higashi‐ku, Fukuoka, 812‐8582 Japan
| | - Masaharu Murata
- Center for Advanced Medical InnovationKyushu University 3‐1‐1 Maidashi, Higashi‐ku, Fukuoka, 812‐8582 Japan
| | - Jeong‐Hun Kang
- Division of Biopharmaceutics and PharmacokineticsNational Cerebral and Cardiovascular Center Research Institute 5‐7‐1 Fujishiro‐dai, Suita, Osaka, 565‐8565, Japan
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Deniset JF, Hedley TE, Hlaváčková M, Chahine MN, Dibrov E, O'Hara K, Maddaford GG, Nelson D, Maddaford TG, Fandrich R, Kardami E, Pierce GN. Heat shock protein 60 involvement in vascular smooth muscle cell proliferation. Cell Signal 2018; 47:44-51. [PMID: 29596871 DOI: 10.1016/j.cellsig.2018.03.011] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 03/23/2018] [Accepted: 03/23/2018] [Indexed: 10/17/2022]
Abstract
AIM Heat shock protein 60 (Hsp60) is a mediator of stress-induced vascular smooth muscle cell (VSMC) proliferation. This study will determine, first, if the mitochondrial or cytoplasmic localization of Hsp60 is critical to VSMC proliferation and, second, the mechanism of Hsp60 induction of VSMC proliferation with a focus on modification of nucleocytoplasmic trafficking. METHODS AND RESULTS Hsp60 was overexpressed in primary rabbit VSMCs with or without a mitochondrial targeting sequence (AdHsp60mito-). Both interventions induced an increase in VSMC PCNA expression and proliferation. The increase in VSMC PCNA expression and growth was not observed after siRNA-mediated knockdown of Hsp60 expression. Nuclear protein import in VSMC was measured by fluorescent microscopy using a microinjected fluorescent import substrate. Nuclear protein import was stimulated by both AdHsp60 and AdHsp60mito- treatments. AdHsp60 treatment also induced increases in nucleoporin (Nup) 62, Nup153, importin-α, importin-β and Ran expression as well as cellular ATP levels compared to control. AdHsp60mito- treatment induced an up-regulation in importin-α, importin-β and Ran expression compared to control. Hsp60 knockdown did not change nuclear protein import nor the expression of any nuclear transport receptors or nucleoporins. Both heat shock treatment and Hsp60 overexpression promoted the interaction of Ran with Hsp60. CONCLUSIONS VSMC proliferation can be modulated via an Hsp60 dependent, cytosol localized mechanism that in part involves a stimulation of nuclear protein import through an interaction with Ran. This novel cellular signaling role for Hsp60 may be important in growth-based vascular pathologies like atherosclerosis and hypertension.
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Affiliation(s)
- Justin F Deniset
- Institute of Cardiovascular Sciences, Albrechtsen Research Centre, St Boniface Hospital, Canada; Departments of Physiology and Pathophysiology, Canada
| | - Thomas E Hedley
- Institute of Cardiovascular Sciences, Albrechtsen Research Centre, St Boniface Hospital, Canada; Departments of Physiology and Pathophysiology, Canada
| | - Markéta Hlaváčková
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Mirna N Chahine
- Institute of Cardiovascular Sciences, Albrechtsen Research Centre, St Boniface Hospital, Canada; Departments of Physiology and Pathophysiology, Canada
| | - Elena Dibrov
- Institute of Cardiovascular Sciences, Albrechtsen Research Centre, St Boniface Hospital, Canada; Departments of Physiology and Pathophysiology, Canada
| | - Kim O'Hara
- Institute of Cardiovascular Sciences, Albrechtsen Research Centre, St Boniface Hospital, Canada; Departments of Physiology and Pathophysiology, Canada
| | - Graham G Maddaford
- Institute of Cardiovascular Sciences, Albrechtsen Research Centre, St Boniface Hospital, Canada; Departments of Physiology and Pathophysiology, Canada
| | - David Nelson
- Institute of Cardiovascular Sciences, Albrechtsen Research Centre, St Boniface Hospital, Canada; Departments of Physiology and Pathophysiology, Canada
| | - Thane G Maddaford
- Institute of Cardiovascular Sciences, Albrechtsen Research Centre, St Boniface Hospital, Canada; Departments of Physiology and Pathophysiology, Canada
| | - Robert Fandrich
- Institute of Cardiovascular Sciences, Albrechtsen Research Centre, St Boniface Hospital, Canada; Anatomy and Cell Biology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Elissavet Kardami
- Institute of Cardiovascular Sciences, Albrechtsen Research Centre, St Boniface Hospital, Canada; Anatomy and Cell Biology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
| | - Grant N Pierce
- Institute of Cardiovascular Sciences, Albrechtsen Research Centre, St Boniface Hospital, Canada; Departments of Physiology and Pathophysiology, Canada.
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Duthie SJ, Beattie JH, Gordon MJ, Pirie LP, Nicol F, Reid MD, Duncan GJ, Cantlay L, Horgan G, McNeil CJ. Nutritional B vitamin deficiency alters the expression of key proteins associated with vascular smooth muscle cell proliferation and migration in the aorta of atherosclerotic apolipoprotein E null mice. GENES AND NUTRITION 2014; 10:446. [PMID: 25446494 DOI: 10.1007/s12263-014-0446-y] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/03/2014] [Accepted: 11/21/2014] [Indexed: 12/11/2022]
Abstract
Low B vitamin status is linked with human vascular disease. We employed a proteomic and biochemical approach to determine whether nutritional folate deficiency and/or hyperhomocysteinemia altered metabolic processes linked with atherosclerosis in ApoE null mice. Animals were fed either a control fat (C; 4 % w/w lard) or a high-fat [HF; 21 % w/w lard and cholesterol (0/15 % w/w)] diet with different B vitamin compositions for 16 weeks. Aorta tissue was prepared and global protein expression, B vitamin, homocysteine and lipoprotein status measured. Changes in the expression of aorta proteins were detected in response to multiple B vitamin deficiency combined with a high-fat diet (P < 0.05) and were strongly linked with lipoprotein concentrations measured directly in the aorta adventitia (P < 0.001). Pathway analysis revealed treatment effects in the aorta-related primarily to cytoskeletal organisation, smooth muscle cell adhesion and invasiveness (e.g., fibrinogen, moesin, transgelin, vimentin). Combined B vitamin deficiency induced striking quantitative changes in the expression of aorta proteins in atherosclerotic ApoE null mice. Deregulated expression of these proteins is associated with human atherosclerosis. Cellular pathways altered by B vitamin status included cytoskeletal organisation, cell differentiation and migration, oxidative stress and chronic inflammation. These findings provide new insight into the molecular mechanisms through which B vitamin deficiency may accelerate atherosclerosis.
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Affiliation(s)
- Susan J Duthie
- School of Pharmacy and Life Sciences, Robert Gordon University, Aberdeen, UK,
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8
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Chahine MN, Mioulane M, Sikkel MB, O'Gara P, Dos Remedios CG, Pierce GN, Lyon AR, Földes G, Harding SE. Nuclear pore rearrangements and nuclear trafficking in cardiomyocytes from rat and human failing hearts. Cardiovasc Res 2014; 105:31-43. [PMID: 25341891 PMCID: PMC4277256 DOI: 10.1093/cvr/cvu218] [Citation(s) in RCA: 19] [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] [Indexed: 01/13/2023] Open
Abstract
Aims During cardiac hypertrophy, cardiomyocytes (CMs) increase in the size and expression of cytoskeletal proteins while reactivating a foetal gene programme. The process is proposed to be dependent on increased nuclear export and, since nuclear pore trafficking has limited capacity, a linked decrease in import. Our objective was to investigate the role of nuclear import and export in control of hypertrophy in rat and human heart failure (HF). Methods and results In myocardial tissue and isolated CMs from patients with dilated cardiomyopathy, nuclear size was increased; Nucleoporin p62, cytoplasmic RanBP1, and nuclear translocation of importins (α and β) were decreased while Exportin-1 was increased. CM from a rat HF model 16 weeks after myocardial infarction (MI) reproduced these nuclear changes. Nuclear import, determined by the rate of uptake of nuclear localization sequence (NLS)-tagged fluorescent substrate, was also decreased and this change was observed from 4 weeks after MI, before HF has developed. Treatment of isolated rat CMs with phenylephrine (PE) for 48 h produced similar cell and nuclear size increases, nuclear import and export protein rearrangement, and NLS substrate uptake decrease through p38 MAPK and HDAC-dependent pathways. The change in NLS substrate uptake occurred within 15 min of PE exposure. Inhibition of nuclear export with leptomycin B reversed established nuclear changes in PE-treated rat CMs and decreased NLS substrate uptake and cell/nuclear size in human CMs. Conclusions Nuclear transport changes related to increased export and decreased import are an early event in hypertrophic development. Hypertrophy can be prevented, or even reversed, by targeting import/export, which may open new therapeutic opportunities.
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Affiliation(s)
| | | | | | | | | | - Grant N Pierce
- Institute of Cardiovascular Sciences, St Boniface General Hospital Research Centre, University of Manitoba, Winnipeg, MB, Canada
| | - Alexander R Lyon
- NHLI, Imperial College, London, UK NIHR Cardiovascular Biomedical Research Unit, Royal Brompton Hospital, London, UK
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Vorpahl M, Schönhofer-Merl S, Michaelis C, Flotho A, Melchior F, Wessely R. The Ran GTPase-activating protein (RanGAP1) is critically involved in smooth muscle cell differentiation, proliferation and migration following vascular injury: implications for neointima formation and restenosis. PLoS One 2014; 9:e101519. [PMID: 24988324 PMCID: PMC4079658 DOI: 10.1371/journal.pone.0101519] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2014] [Accepted: 06/07/2014] [Indexed: 12/12/2022] Open
Abstract
Differentiation and dedifferentiation, accompanied by proliferation play a pivotal role for the phenotypic development of vascular proliferative diseases (VPD), such as restenosis. Increasing evidence points to an essential role of regulated nucleoporin expression in the choice between differentiation and proliferation. However, whether components of the Ran GTPase cycle, which is of pivotal importance for both nucleocytoplasmic transport and for mitotic progression, are subject to similar regulation in VPD is currently unknown. Here, we show that differentiation of human coronary artery smooth muscle cell (CASMC) to a contractile phenotype by stepwise serum depletion leads to significant reduction of RanGAP1 protein levels. The inverse event, dedifferentiation of cells, was assessed in the rat carotid artery balloon injury model, a well-accepted model for neointima formation and restenosis. As revealed by temporospatial analysis of RanGAP1 expression, neointima formation in rat carotid arteries was associated with a significant upregulation of RanGAP1 expression at 3 and 7 days after balloon injury. Of note, neointimal cells located at the luminal surface revealed persistent RanGAP1 expression, as opposed to cells in deeper layers of the neointima where RanGAP1 expression was less or not detectable at all. To gain first evidence for a direct influence of RanGAP1 levels on differentiation, we reduced RanGAP1 in human coronary artery smooth muscle cells by siRNA. Indeed, downregulation of the essential RanGAP1 protein by 50% induced a differentiated, spindle-like smooth muscle cell phenotype, accompanied by an upregulation of the differentiation marker desmin. Reduction of RanGAP1 levels also resulted in a reduction of mitogen induced cellular migration and proliferation as well as a significant upregulation of the cyclin-dependent kinase inhibitor p27KIP1, without evidence for cellular necrosis. These findings suggest that RanGAP1 plays a critical role in smooth muscle cell differentiation, migration and proliferation in vitro and in vivo. Appropriate modulation of RanGAP1 expression may thus be a strategy to modulate VPD development such as restenosis.
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Affiliation(s)
- Marc Vorpahl
- Department of Cardiology, HELIOS Klinikum Wuppertal, University Witten/Herdecke, Witten, Germany
- * E-mail: (MV); (RW)
| | - Sabine Schönhofer-Merl
- Deutsches Herzzentrum Muenchen and 1. Medizinische Klinik, Klinikum rechts der Isar, Technische Universitaet Muenchen, Muenchen, Germany
| | - Cornelia Michaelis
- Deutsches Herzzentrum Muenchen and 1. Medizinische Klinik, Klinikum rechts der Isar, Technische Universitaet Muenchen, Muenchen, Germany
| | - Annette Flotho
- Zentrum für Molekulare Biologie der Universität Heidelberg (ZMBH), DKFZ - ZMBH Alliance, Heidelberg, Germany
| | - Frauke Melchior
- Zentrum für Molekulare Biologie der Universität Heidelberg (ZMBH), DKFZ - ZMBH Alliance, Heidelberg, Germany
| | - Rainer Wessely
- Deutsches Herzzentrum Muenchen and 1. Medizinische Klinik, Klinikum rechts der Isar, Technische Universitaet Muenchen, Muenchen, Germany
- Zentrum fuer Herz-Gefaess-Lungenmedizin, Cologne, Germany
- * E-mail: (MV); (RW)
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Chahine MN, Dibrov E, Blackwood DP, Pierce GN. Oxidized LDL enhances stretch-induced smooth muscle cell proliferation through alterations in nuclear protein import. Can J Physiol Pharmacol 2012; 90:1559-68. [DOI: 10.1139/y2012-141] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Mechanical stress contributes to hypertension and atherosclerosis partly through the stimulation of vascular smooth muscle cell (VSMC) proliferation. Oxidized low density lipoprotein (oxLDL) is another important atherogenic factor that can increase VSMC proliferation. The purpose of this study was to investigate whether oxLDL could further enhance the proliferative action of mechanical stretch on VSMC, and to determine the mechanism responsible for this interaction. Because nuclear protein import is critical in regulating gene expression, transcription, and cell proliferation, its involvement in the mitogenic effects of oxLDL and mechanical stress was studied. OxLDL enhanced the proliferative effects of mechanical stretch on its own in rabbit aortic VSMC, and induced increases in the expression of HSP60 in an additive manner. Adenoviral-mediated overexpression of HSP60 induced increases in cell proliferation compared with uninfected VSMC. Mechanical stretch and oxLDL stimulated the rate of nuclear protein import in VSMC and increased the expression of nucleoporins. These effects were sensitive to inhibition of the MAPK pathway. We conclude that oxLDL and mechanical stretch have a synergistic effect on VSMC proliferation. This synergistic effect is induced through a stimulation of nuclear protein import via HSP60 and an activation of the MAPK pathway.
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Affiliation(s)
- Mirna N. Chahine
- Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre, Department of Physiology, Faculties of Medicine and Pharmacy, University of Manitoba, Winnipeg, MB R2H 2A6, Canada
| | - Elena Dibrov
- Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre, Department of Physiology, Faculties of Medicine and Pharmacy, University of Manitoba, Winnipeg, MB R2H 2A6, Canada
| | - David P. Blackwood
- Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre, Department of Physiology, Faculties of Medicine and Pharmacy, University of Manitoba, Winnipeg, MB R2H 2A6, Canada
| | - Grant N. Pierce
- Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre, Department of Physiology, Faculties of Medicine and Pharmacy, University of Manitoba, Winnipeg, MB R2H 2A6, Canada
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Nuclear transport: a switch for the oxidative stress-signaling circuit? JOURNAL OF SIGNAL TRANSDUCTION 2011; 2012:208650. [PMID: 22028962 PMCID: PMC3195498 DOI: 10.1155/2012/208650] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/24/2011] [Accepted: 07/05/2011] [Indexed: 01/01/2023]
Abstract
Imbalances in the formation and clearance of reactive oxygen species (ROS) can lead to oxidative stress and subsequent changes that affect all aspects of physiology. To limit and repair the damage generated by ROS, cells have developed a multitude of responses. A hallmark of these responses is the activation of signaling pathways that modulate the function of downstream targets in different cellular locations. To this end, critical steps of the stress response that occur in the nucleus and cytoplasm have to be coordinated, which makes the proper communication between both compartments mandatory. Here, we discuss the interdependence of ROS-mediated signaling and the transport of macromolecules across the nuclear envelope. We highlight examples of oxidant-dependent nuclear trafficking and describe the impact of oxidative stress on the transport apparatus. Our paper concludes by proposing a cellular circuit of ROS-induced signaling, nuclear transport and repair.
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Faustino RS, Maddaford TG, Pierce GN. Mitogen activated protein kinase at the nuclear pore complex. J Cell Mol Med 2011; 15:928-37. [PMID: 20497490 PMCID: PMC3922677 DOI: 10.1111/j.1582-4934.2010.01093.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Accepted: 03/19/2010] [Indexed: 01/09/2023] Open
Abstract
Mitogen activated protein (MAP) kinases control eukaryotic proliferation, and import of kinases into the nucleus through the nuclear pore complex (NPC) can influence gene expression to affect cellular growth, cell viability and homeostatic function. The NPC is a critical regulatory checkpoint for nucleocytoplasmic traffic that regulates gene expression and cell growth, and MAP kinases may be physically associated with the NPC to modulate transport. In the present study, highly enriched NPC fractions were isolated and investigated for associated kinases and/or activity. Endogenous kinase activity was identified within the NPC fraction, which phosphorylated a 30 kD nuclear pore protein. Phosphomodification of this nucleoporin, here termed Nup30, was inhibited by apigenin and PD-98059, two MAP kinase antagonists as well as with SB-202190, a pharmacological blocker of p38. Furthermore, high throughput profiling of enriched NPCs revealed constitutive presence of all members of the MAP kinase family, extracellular regulated kinases (ERK), p38 and Jun N-terminal kinase. The NPC thus contains a spectrum of associated MAP kinases that suggests an intimate role for ERK and p38 in regulation of nuclear pore function.
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Affiliation(s)
- Randolph S Faustino
- Institute of Cardiovascular Sciences, St Boniface Hospital Research Centre, and Department of Physiology, Faculty of Medicine, University of ManitobaWinnipeg, Canada
| | - Thane G Maddaford
- Institute of Cardiovascular Sciences, St Boniface Hospital Research Centre, and Department of Physiology, Faculty of Medicine, University of ManitobaWinnipeg, Canada
| | - Grant N Pierce
- Institute of Cardiovascular Sciences, St Boniface Hospital Research Centre, and Department of Physiology, Faculty of Medicine, University of ManitobaWinnipeg, Canada
- Faculty of Pharmacy, University of ManitobaWinnipeg, Canada
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Chahine MN, Pierce GN. Therapeutic Targeting of Nuclear Protein Import in Pathological Cell Conditions. Pharmacol Rev 2009; 61:358-72. [DOI: 10.1124/pr.108.000620] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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15
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Chahine MN, Blackwood DP, Dibrov E, Richard MN, Pierce GN. Oxidized LDL affects smooth muscle cell growth through MAPK-mediated actions on nuclear protein import. J Mol Cell Cardiol 2009; 46:431-41. [DOI: 10.1016/j.yjmcc.2008.10.009] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Revised: 10/02/2008] [Accepted: 10/06/2008] [Indexed: 11/25/2022]
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Lysophosphatidylcholine up-regulates human endothelial nitric oxide synthase gene transactivity by c-Jun N-terminal kinase signalling pathway. J Cell Mol Med 2008; 13:1136-48. [PMID: 18624763 PMCID: PMC4496109 DOI: 10.1111/j.1582-4934.2008.00394.x] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022] Open
Abstract
Human endothelial nitric oxide synthase (eNOS) plays a pivotal role in maintaining blood pressure homeostasis and vascular integrity. It has recently been reported that mitogen-activated protein kinases (MAPKs) are intimately implicated in expression of eNOS. However detailed mechanism mediated by them remains to be clarified. In this study, eNOS gene transactivity in human umbilical vein endothelial cells was up-regulated by stimulation of lysophosphatidylcholine (LPC). The stimulation of LPC highly activated both extracellular signal-regulated kinase 1/2 (ERK1/2) and c-Jun N-terminal kinase (JNK), with differences in the dynamic processes of activation between them. Unexpectedly, p38 MAPK could not be activated by the stimulation of LPC. The activation of JNK signalling pathway by overexpression of JNK or its upstream kinase active mutant up-regulated the transactivity of eNOS significantly, but the activation of p38 signalling pathway down-regulated it largely. The inhibition of either ERK1/2 or JNK signalling pathway by kinase-selective inhibitors could markedly block the induction of the transactivity by LPC. It was observed by electrophoretic mobility shift assay that LPC stimulated both SP1 and AP1 DNA binding activity to go up. Additionally using decoy oligonucleotides proved that SP1 was necessary for maintaining the basal or stimulated transactivity, whereas AP1 contributed mainly to the increase of the stimulated transactivity. These findings indicate that the up-regulation of the eNOS gene transactivity by LPC involves the enhancement of SP1 transcription factor by the activation of JNK and ERK1/2 signalling pathways and AP1 transcription factor by the activation of JNK signalling pathway.
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Faustino RS, Cheung P, Richard MN, Dibrov E, Kneesch AL, Deniset JF, Chahine MN, Lee K, Blackwood D, Pierce GN. Ceramide regulation of nuclear protein import. J Lipid Res 2007; 49:654-62. [PMID: 18083977 DOI: 10.1194/jlr.m700464-jlr200] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Nucleocytoplasmic trafficking is an essential and responsive cellular mechanism that directly affects cell growth and proliferation, and its potential to address metabolic challenge is incompletely defined. Ceramide is an antiproliferative sphingolipid found within vascular smooth muscle cells in atherosclerotic plaques, but its mechanism of action remains unclear. The hypothesis that ceramide inhibits cell growth through nuclear transport regulation was tested. In smooth muscle cells, exogenously supplemented ceramide inhibited classical nuclear protein import that involved the activation of cytosolic p38 mitogen-activated protein kinase (MAPK). After application of SB 202190, a specific and potent pharmacological antagonist of p38 MAPK, sphingolipid impingement on nuclear transport was corrected. Distribution pattern assessments of two essential nuclear transport proteins, importin-alpha and Cellular Apoptosis Susceptibility, revealed ceramide-mediated relocalization that was reversed upon the addition of SB 202190. Furthermore, cell counts, nuclear cyclin A, and proliferating cell nuclear antigen expression, markers of cellular proliferation, were diminished after ceramide treatment and effectively rescued by the addition of inhibitor. Together, these data demonstrate, for the first time, the sphingolipid regulation of nuclear import that defines and expands the adaptive capacity of the nucleocytoplasmic transport machinery.
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Affiliation(s)
- Randolph S Faustino
- Institute of Cardiovascular Sciences, St. Boniface Hospital Research Centre, Department of Physiology, Faculties of Medicine and Pharmacy, University of Manitoba, Winnipeg, Manitoba, Canada
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Richard MN, Deniset JF, Kneesh AL, Blackwood D, Pierce GN. Mechanical Stretching Stimulates Smooth Muscle Cell Growth, Nuclear Protein Import, and Nuclear Pore Expression through Mitogen-activated Protein Kinase Activation. J Biol Chem 2007; 282:23081-8. [PMID: 17525165 DOI: 10.1074/jbc.m703602200] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Although it is known that mechanical stretching of cells can induce significant increases in cell growth and shape, the intracellular signaling pathways that induce this response at the level of the cell nucleus is unknown. The transport of molecules from the cell cytoplasm to the nucleoplasm through the nuclear pore is a key pathway through which gene expression can be controlled in some conditions. It is presently unknown if mechanical stimuli can induce changes in nuclear pore expression and/or function. The purpose of the present investigation was to determine if mechanical stretching of a cell will alter nuclear protein import and the mechanisms that may be responsible. Vascular smooth muscle cells that were mechanically stretched exhibited an increase in proliferating cell nuclear antigen expression, cell number, and cell size within 24-48 h. Cells were microinjected with marker proteins for nuclear import. Nuclear protein import was significantly stimulated in stretched cells when compared with control. This was associated with an increase in the expression of nuclear pore proteins as detected by Western blots. Inhibition of the MAPK pathway blocked the stretch-induced stimulation of both cell proliferation and nuclear protein import. We conclude that nuclear protein import and nuclear pore density can adapt to mechanical stimuli during the process of cell growth through a MAPK-mediated mechanism.
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Affiliation(s)
- Melanie N Richard
- Institute of Cardiovascular Sciences, St. Boniface General Hospital Research Centre, Department of Physiology, Faculties of Medicine and Pharmacy, University of Manitoba, Winnipeg, Manitoba R2H 2A6, Canada
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Abstract
Drugs directed at plasma membrane receptors target environment-cell interactions and are the mainstay of clinical pharmacology. Decoding mechanisms that govern intracellular signaling has recently opened new therapeutic avenues for interventions at cytosol-organellar interfaces. The nuclear envelope and nuclear transport machinery have emerged central in the discovery and development of experimental therapeutics capable of modulating cellular genetic programs. Insight into nucleocytoplasmic exchange has unmasked promising anticancer, antiviral, and anti-inflammatory strategies.
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Affiliation(s)
- R S Faustino
- Marriott Heart Disease Research Program, Division of Cardiovascular Diseases, Departments of Medicine, Molecular Pharmacology and Experimental Therapeutics, and Medical Genetics, Mayo Clinic, Rochester, Minnesota, USA
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