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Amaya R, Pierides A, Tarbell JM. The Interaction between Fluid Wall Shear Stress and Solid Circumferential Strain Affects Endothelial Gene Expression. PLoS One 2015; 10:e0129952. [PMID: 26147292 PMCID: PMC4492743 DOI: 10.1371/journal.pone.0129952] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2013] [Accepted: 05/14/2015] [Indexed: 11/19/2022] Open
Abstract
Endothelial cells lining the walls of blood vessels are exposed simultaneously to wall shear stress (WSS) and circumferential stress (CS) that can be characterized by the temporal phase angle between WSS and CS (stress phase angle - SPA). Regions of the circulation with highly asynchronous hemodynamics (SPA close to -180°) such as coronary arteries are associated with the development of pathological conditions such as atherosclerosis and intimal hyperplasia whereas more synchronous regions (SPA closer to 0°) are spared of disease. The present study evaluates endothelial cell gene expression of 42 atherosclerosis-related genes under asynchronous hemodynamics (SPA=-180 °) and synchronous hemodynamics (SPA=0 °). This study used a novel bioreactor to investigate the cellular response of bovine aortic endothelial cells (BAECS) exposed to a combination of pulsatile WSS and CS at SPA=0 or SPA=-180. Using a PCR array of 42 genes, we determined that BAECS exposed to non-reversing sinusoidal WSS (10±10 dyne/cm2) and CS (4 ± 4%) over a 7 hour testing period displayed 17 genes that were up regulated by SPA = -180 °, most of them pro-atherogenic, including NFκB and other NFκB target genes. The up regulation of NFκB p50/p105 and p65 by SPA =-180° was confirmed by Western blots and immunofluorescence staining demonstrating the nuclear translocation of NFκB p50/p105 and p65. These data suggest that asynchronous hemodynamics (SPA=-180 °) can elicit proatherogenic responses in endothelial cells compared to synchronous hemodynamics without shear stress reversal, indicating that SPA may be an important parameter characterizing arterial susceptibility to disease.
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Affiliation(s)
- Ronny Amaya
- Department of Biomedical Engineering, City College of New York, City University of New York, New York, New York, 10031, United States of America
| | - Alexis Pierides
- Department of Biomedical Engineering, City College of New York, City University of New York, New York, New York, 10031, United States of America
| | - John M. Tarbell
- Department of Biomedical Engineering, City College of New York, City University of New York, New York, New York, 10031, United States of America
- * E-mail:
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Wedgwood S, Lakshminrusimha S, Schumacker PT, Steinhorn RH. Cyclic stretch stimulates mitochondrial reactive oxygen species and Nox4 signaling in pulmonary artery smooth muscle cells. Am J Physiol Lung Cell Mol Physiol 2015; 309:L196-203. [PMID: 26024892 DOI: 10.1152/ajplung.00097.2014] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2014] [Accepted: 05/26/2015] [Indexed: 02/07/2023] Open
Abstract
This study was designed to determine whether cyclic stretch induces a persistent pulmonary hypertension of the newborn (PPHN) phenotype of increased NADPH oxidase (Nox) 4 signaling in control pulmonary artery smooth muscle cells (PASMC), and to identify the signal transduction molecules involved. To achieve this, PPHN was induced in lambs by antenatal ligation of the ductus arteriosus at 128 days gestation. After 9 days, lungs and PASMC were isolated from control (twin) and PPHN lambs. Control PASMC were exposed to cyclic stretch at 1 Hz and 15% elongation for 24 h. Stretch-induced Nox4 expression was attenuated by inhibition of mitochondrial complex III and NF-κB, and stretch-induced protein thiol oxidation was attenuated by Nox4 small interfering RNA and complex III inhibition. NF-κB activity was increased by stretch in a complex III-dependent fashion, and stretch-induced cyclin D1 expression was attenuated by complex III inhibition and Nox4 small interfering RNA. This is the first study to show that cyclic stretch increases Nox4 expression via mitochondrial complex III-induced activation of NF-κB in fetal PASMC, resulting in ROS signaling and increased cyclin D1 expression. Targeting these signaling molecules may attenuate pulmonary vascular remodeling associated with PPHN.
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Affiliation(s)
- Stephen Wedgwood
- Department of Pediatrics, University of California Davis Medical Center, Sacramento, California;
| | - Satyan Lakshminrusimha
- Department of Pediatrics, State University of New York at Buffalo, Buffalo, New York; and
| | - Paul T Schumacker
- Department of Pediatrics, Northwestern University, Chicago, Illinois
| | - Robin H Steinhorn
- Department of Pediatrics, University of California Davis Medical Center, Sacramento, California
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Veerman CC, Kosmidis G, Mummery CL, Casini S, Verkerk AO, Bellin M. Immaturity of Human Stem-Cell-Derived Cardiomyocytes in Culture: Fatal Flaw or Soluble Problem? Stem Cells Dev 2015; 24:1035-52. [DOI: 10.1089/scd.2014.0533] [Citation(s) in RCA: 190] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Affiliation(s)
- Christiaan C. Veerman
- Department of Experimental Cardiology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Georgios Kosmidis
- Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, the Netherlands
| | - Christine L. Mummery
- Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, the Netherlands
| | - Simona Casini
- Department of Experimental Cardiology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
- Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, the Netherlands
| | - Arie O. Verkerk
- Department of Anatomy, Embryology and Physiology, Academic Medical Center, University of Amsterdam, Amsterdam, the Netherlands
| | - Milena Bellin
- Department of Anatomy and Embryology, Leiden University Medical Center, Leiden, the Netherlands
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Vitamin D attenuates pro-inflammatory TNF-α cytokine expression by inhibiting NF-кB/p65 signaling in hypertrophied rat hearts. J Physiol Biochem 2015; 71:289-99. [PMID: 25929726 DOI: 10.1007/s13105-015-0412-1] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2014] [Accepted: 04/09/2015] [Indexed: 01/22/2023]
Abstract
A growing body of evidence suggests that immune activation and inflammatory mediators may play a key role in the development and progression of left ventricle (LV) hypertrophy. The present study was designed to test the hypothesis that the cardioprotective effect of cholecalciferol (Vit-D3) is mediated via the regulation of messenger RNA (mRNA) expression of pro-inflammatory cytokines. Rats were randomly divided into four groups: control group received normal saline (0.9 % NaCl) i.p. for 14 days; Vit-D3 group received Vit-D3 at a dose of 12 μg/kg/day by gavage for 14 days; ISO group received saline for 7 days, and at day 7, ISO (5 mg/kg/day) was injected i.p. for 7 consecutive days to induce cardiac hypertrophy; and Vit-D3 + ISO group was treated with Vit-D3 for 14 days, and at day 7, ISO was administered for 7 consecutive days. Heart/body weight ratio, troponin-T, creatine kinase-MB, and tumor necrosis factor-α (TNF-α) levels of LV tissue were estimated. Levels of mRNA expression of NF-кB (NF-кB)/p65 and inhibitory kappa B (IкB)-α were determined by real-time PCR. Vit-D3 administration before and during induction of cardiac hypertrophy significantly reduced (P < 0.001) cardiac biomarkers. The histopathological examination further confirmed these results. In addition, Vit-D3 significantly decreased (P < 0.001) NF-кB-p65 mRNA expression and increased (P < 0.01) IкB-α mRNA expression in LV tissues compared to ISO group. Based on these findings, it was concluded that the administration of cholecalciferol markedly attenuated the development of ISO-induced cardiac hypertrophy likely through downregulation of TNF-α /NF-кb/p65 signaling pathways. However, it should be pointed out that other signaling pathways may contribute to the cardioprotective effect of Vit-D3 which requires further investigation.
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5-, 12- and 15-Hydroxyeicosatetraenoic acids induce cellular hypertrophy in the human ventricular cardiomyocyte, RL-14 cell line, through MAPK- and NF-κB-dependent mechanism. Arch Toxicol 2015; 90:359-73. [DOI: 10.1007/s00204-014-1419-z] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2014] [Accepted: 11/17/2014] [Indexed: 01/01/2023]
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Yoshida T, Friehs I, Mummidi S, del Nido PJ, Addulnour-Nakhoul S, Delafontaine P, Valente AJ, Chandrasekar B. Pressure overload induces IL-18 and IL-18R expression, but markedly suppresses IL-18BP expression in a rabbit model. IL-18 potentiates TNF-α-induced cardiomyocyte death. J Mol Cell Cardiol 2014; 75:141-51. [PMID: 25108227 PMCID: PMC4157969 DOI: 10.1016/j.yjmcc.2014.07.007] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/07/2014] [Revised: 07/15/2014] [Accepted: 07/16/2014] [Indexed: 10/24/2022]
Abstract
Recurrent or sustained inflammation plays a causal role in the development and progression of left ventricular hypertrophy (LVH) and its transition to failure. Interleukin (IL)-18 is a potent pro-hypertrophic inflammatory cytokine. We report that induction of pressure overload in the rabbit, by constriction of the descending thoracic aorta induces compensatory hypertrophy at 4weeks (mass/volume ratio: 1.7±0.11) and ventricular dilatation indicative of heart failure at 6weeks (mass/volume ratio: 0.7±0.04). In concordance with this, fractional shortening was preserved at 4weeks, but markedly attenuated at 6weeks. We cloned rabbit IL-18, IL-18Rα, IL-18Rβ, and IL-18 binding protein (IL-18BP) cDNA, and show that pressure overload, while enhancing IL-18 and IL-18R expression in hypertrophied and failing hearts, markedly attenuated the level of expression of the endogenous IL-18 antagonist IL-18BP. Cyclical mechanical stretch (10% cyclic equibiaxial stretch, 1Hz) induced hypertrophy of primary rabbit cardiomyocytes in vitro and enhanced ANP, IL-18, and IL-18Rα expression. Further, treatment with rhIL-18 induced its own expression and that of IL-18Rα via AP-1 activation, and induced cardiomyocyte hypertrophy in part via PI3K/Akt/GATA4 signaling. In contrast, IL-18 potentiated TNF-α-induced cardiomyocyte death, and by itself induced cardiac endothelial cell death. These results demonstrate that pressure overload is associated with enhanced IL-18 and its receptor expression in hypertrophied and failingrabbit hearts. Since IL-18BP expression is markedly inhibited, our results indicate a positive amplification in IL-18 proinflammatory signaling during pressure overload, and suggest IL-18 as a potential therapeutic target in pathological hypertrophy and cardiac failure.
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Affiliation(s)
- Tadashi Yoshida
- Heart and Vascular Institute, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Ingeborg Friehs
- Department of Cardiac Surgery, Children's Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA
| | - Srinivas Mummidi
- South Texas Veterans Health Care System and Department of Medicine, University of Texas Health Science Center, San Antonio, TX 78229, USA
| | - Pedro J del Nido
- Department of Cardiac Surgery, Children's Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA
| | - Solange Addulnour-Nakhoul
- Department of Medicine-Gastroenterology, Tulane University School of Medicine, New Orleans, LA 70112, USA; Research Service, Southeast Louisiana Veterans Health Care System, New Orleans, LA 70161, USA
| | - Patrice Delafontaine
- Heart and Vascular Institute, Tulane University School of Medicine, New Orleans, LA 70112, USA
| | - Anthony J Valente
- Department of Cardiac Surgery, Children's Hospital Boston, Harvard Medical School, 300 Longwood Avenue, Boston, MA 02115, USA
| | - Bysani Chandrasekar
- Heart and Vascular Institute, Tulane University School of Medicine, New Orleans, LA 70112, USA; Research Service, Southeast Louisiana Veterans Health Care System, New Orleans, LA 70161, USA.
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Beckmann R, Houben A, Tohidnezhad M, Kweider N, Fragoulis A, Wruck CJ, Brandenburg LO, Hermanns-Sachweh B, Goldring MB, Pufe T, Jahr H. Mechanical forces induce changes in VEGF and VEGFR-1/sFlt-1 expression in human chondrocytes. Int J Mol Sci 2014; 15:15456-74. [PMID: 25257525 PMCID: PMC4200847 DOI: 10.3390/ijms150915456] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2014] [Revised: 08/22/2014] [Accepted: 08/25/2014] [Indexed: 11/21/2022] Open
Abstract
Expression of the pro-angiogenic vascular endothelial growth factor (VEGF) stimulates angiogenesis and correlates with the progression of osteoarthritis. Mechanical joint loading seems to contribute to this cartilage pathology. Cyclic equibiaxial strains of 1% to 16% for 12 h, respectively, induced expression of VEGF in human chondrocytes dose- and frequency-dependently. Stretch-mediated VEGF induction was more prominent in the human chondrocyte cell line C-28/I2 than in primary articular chondrocytes. Twelve hours of 8% stretch induced VEGF expression to 175% of unstrained controls for at least 24 h post stretching, in promoter reporter and enzyme-linked immunosorbent assay (ELISA) studies. High affinity soluble VEGF-receptor, sVEGFR-1/sFlt-1 was less stretch-inducible than its ligand, VEGF-A, in these cells. ELISA assays demonstrated, for the first time, a stretch-mediated suppression of sVEGFR-1 secretion 24 h after stretching. Overall, strained chondrocytes activate their VEGF expression, but in contrast, strain appears to suppress the secretion of the major VEGF decoy receptor (sVEGFR-1/sFlt-1). The latter may deplete a biologically relevant feedback regulation to inhibit destructive angiogenesis in articular cartilage. Our data suggest that mechanical stretch can induce morphological changes in human chondrocytes in vitro. More importantly, it induces disturbed VEGF signaling, providing a molecular mechanism for a stress-induced increase in angiogenesis in cartilage pathologies.
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Affiliation(s)
- Rainer Beckmann
- Department of Anatomy and Cell Biology, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, 52074 Aachen, Germany.
| | - Astrid Houben
- Department of Anatomy and Cell Biology, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, 52074 Aachen, Germany.
| | - Mersedeh Tohidnezhad
- Department of Anatomy and Cell Biology, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, 52074 Aachen, Germany.
| | - Nisreen Kweider
- Department of Anatomy and Cell Biology, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, 52074 Aachen, Germany.
| | - Athanassios Fragoulis
- Department of Anatomy and Cell Biology, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, 52074 Aachen, Germany.
| | - Christoph J Wruck
- Department of Anatomy and Cell Biology, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, 52074 Aachen, Germany.
| | - Lars O Brandenburg
- Department of Anatomy and Cell Biology, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, 52074 Aachen, Germany.
| | | | - Mary B Goldring
- Research Division, Hospital for Special Surgery, Weill Cornell Medical College, New York, NY 10021, USA.
| | - Thomas Pufe
- Department of Anatomy and Cell Biology, Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen University, 52074 Aachen, Germany.
| | - Holger Jahr
- Department of Orthopaedic Surgery, RWTH Aachen University, 52074 Aachen, Germany.
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Wang J, Sontag D, Cattini PA. Heart-specific expression of FGF-16 and a potential role in postnatal cardioprotection. Cytokine Growth Factor Rev 2014; 26:59-66. [PMID: 25106133 DOI: 10.1016/j.cytogfr.2014.07.007] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2014] [Revised: 07/11/2014] [Accepted: 07/14/2014] [Indexed: 10/25/2022]
Abstract
Fibroblast growth factor 16 (FGF-16) was originally cloned from rat heart. Subsequent investigation of mouse FGF-16, including generation of null mice, revealed a specific pattern of expression in the endocardium and epicardium, and role for FGF-16 during embryonic heart development. FGF-16 is expressed mainly in brown adipose tissue during rat embryonic development, but is expressed mainly in the murine heart after birth. There is also an apparent switch from limited endocardial and epicardial expression in the embryo to the myocardium in the perinatal period. The FGF-16 gene and its location on the X chromosome are conserved between human and murine species, and no other member of the FGF family shows this pattern of spatial and temporal expression. The human and murine FGF-16 gene promoter regions also share an equivalent location for TATA sequences, as well as adjacent putative binding sites for transcription factors linked to cardiac expression and response to stress. Recent evidence has implicated nonsense mutation of FGF-16 with increased cardiovascular risk, and FGF-16 supplementation with cardioprotection. Here we review the important role of FGF-16 in embryonic heart development, its gene regulation, and evidence for FGF-16 as an endogenous and exogenous cardiac-specific and protective factor in the postnatal heart. Moreover, given the conservation of the FGF-16 gene and its chromosomal location between species, the question of support for a cardiac role in the human population is also considered.
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Affiliation(s)
- Jie Wang
- Department of Physiology & Pathophysiology, University of Manitoba, Manitoba, Canada.
| | - David Sontag
- Department of Physiology & Pathophysiology, University of Manitoba, Manitoba, Canada
| | - Peter A Cattini
- Department of Physiology & Pathophysiology, University of Manitoba, Manitoba, Canada
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Umoh NA, Walker RK, Al-Rubaiee M, Jeffress MA, Haddad GE. Acute alcohol modulates cardiac function as PI3K/Akt regulates oxidative stress. Alcohol Clin Exp Res 2014; 38:1847-64. [PMID: 24962888 DOI: 10.1111/acer.12459] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/16/2013] [Accepted: 04/07/2014] [Indexed: 12/22/2022]
Abstract
BACKGROUND Clinical manifestations of alcohol abuse on the cardiac muscle include defective contractility with the development of heart failure. Interestingly, low alcohol consumption has been associated with reduced risk of cardiovascular disease. Although several hypotheses have been postulated for alcoholic cardiomyopathy and for the low-dose beneficial cardiovascular effects, the precise mechanisms and mediators remain largely undefined. We hypothesize that modulation of oxidative stress by PI3K/Akt plays a key role in the cardiac functional outcome to acute alcohol exposure. METHODS Thus, acutely exposed rat cardiac tissue and cardiocytes to low (LA: 5 mM), moderate (MA: 25 mM), and high (HA: 100 mM) alcohol were assessed for markers of oxidative stress in the presence and absence of PI3K/Akt activators (IGF-1 0.1 μM or constitutively active PI3K: Ad.BD110 transfection) or inhibitor (LY294002 1 μM or Akt-negative construct Ad.Akt(K179M) transfection). RESULTS Acute LA reduced Akt, superoxide dismutase (SOD-3) and NFκB, ERK1, and p38 MAPK gene expression. Acute HA only increased that of SOD-3 and NFκB. These effects were generally inhibited by Ad.Akt(K179M) and enhanced with Ad.BD110 transfection. In parallel, LA reduced but HA enhanced Akt activity, which was reversed by IGF-1 and inhibited by Ad.Akt(K179M), respectively. Also, LA reduced caspase 3/7 activity and oxidative stress, while HA increased both. The former was blocked, while the latter effect was enhanced by Ad.Akt(K179M). The reverse was true with PI3K/Akt activation. This translated into reduced viability with HA, with no effect with LA. On the functional level, acute LA improved cardiac output and ejection fraction, mainly through increased stroke volume. This was accompanied with enhanced end-systolic pressure-volume relationship and preload recruitable stroke work. Opposite effect was recorded for HA. LA and HA in vivo functional effects were alleviated by LY and enhanced by IGF-1 treatment. CONCLUSIONS Acute LA and HA seem to oppositely affect cardiac function through modulation of oxidative stress where PI3K/Akt plays a pivotal role.
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Affiliation(s)
- Nsini A Umoh
- Department of Physiology & Biophysics, College of Medicine, Howard University, Washington, District of Columbia
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Menendez-Castro C, Toka O, Fahlbusch F, Cordasic N, Wachtveitl R, Hilgers KF, Rascher W, Hartner A. Impaired myocardial performance in a normotensive rat model of intrauterine growth restriction. Pediatr Res 2014; 75:697-706. [PMID: 24603294 DOI: 10.1038/pr.2014.27] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/31/2013] [Accepted: 11/01/2013] [Indexed: 01/21/2023]
Abstract
BACKGROUND Intrauterine growth restriction (IUGR) is an important risk factor for cardiovascular disease. Previous studies revealed altered myocardial matrix composition after IUGR. We hypothesized that IUGR is accompanied by compromised myocardial performance independently from arterial hypertension. METHODS IUGR was induced in Wistar rats by maternal protein restriction, and hearts of male offspring were studied using echocardiography, immunohistochemistry, real-time PCR, and western blot analysis. RESULTS At day 70 of life, in the absence of arterial hypertension (mean arterial blood pressure: 101.3 ± 7.1 mmHg in IUGR vs. 105.3 ± 4.6 mmHg in controls, not significant (NS)), echocardiography showed a reduced contractility (ejection fraction: 65.4 ± 1.8% in IUGR vs. 82.2 ± 1.5% in controls, P < 0.001) of a more distensible myocardium in IUGR rats. Altered expression patterns of myosin chains and titin isoforms and increased expression levels of atrial natriuretic peptide, Na/K-ATPase, and β-adrenergic receptor 1 were detected. A higher number of cardiac fibroblasts and vascular cross-sections were observed in IUGR rats, accompanied by elevated expression of hypoxia inducible factor 1 target genes, such as vascular endothelial growth factor and its receptors. CONCLUSION We observed a blood pressure-independent impairment of myocardial function after IUGR, which possibly favors cardiovascular disease later in life. Some IUGR-induced myocardial changes (e.g., sarcomeric components) may partly explain the compromised cardiac performance, whereas others (e.g., elevated vascular supply) reflect compensatory mechanisms.
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Affiliation(s)
- Carlos Menendez-Castro
- Department of Pediatrics and Adolescent Medicine, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Okan Toka
- Department of Pediatric Cardiology, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Fabian Fahlbusch
- Department of Pediatrics and Adolescent Medicine, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Nada Cordasic
- Department of Nephrology and Hypertension, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Rainer Wachtveitl
- Department of Pediatrics and Adolescent Medicine, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Karl F Hilgers
- Department of Nephrology and Hypertension, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Wolfgang Rascher
- Department of Pediatrics and Adolescent Medicine, University of Erlangen-Nürnberg, Erlangen, Germany
| | - Andrea Hartner
- Department of Pediatrics and Adolescent Medicine, University of Erlangen-Nürnberg, Erlangen, Germany
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Shimokawahara H, Jougasaki M, Setoguchi M, Ichiki T, Sonoda M, Nuruki N, Nakashima H, Murohara T, Tsubouchi H. Relationship between vascular endothelial growth factor and left ventricular dimension in patients with acute myocardial infarction. J Cardiol 2014; 64:360-5. [PMID: 24698007 DOI: 10.1016/j.jjcc.2014.02.017] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/21/2013] [Revised: 02/10/2014] [Accepted: 02/12/2014] [Indexed: 11/25/2022]
Abstract
BACKGROUND Although vascular endothelial growth factor (VEGF) is elevated in patients with acute myocardial infarction (AMI), the clinical significance of its elevation remains unclear. The present study was designed to determine the relationship between VEGF and left ventricular dimension in patients with AMI. METHODS AND RESULTS Plasma VEGF levels were examined by enzyme-linked immunosorbent assay daily for one week and then weekly for four weeks in 38 patients with AMI (65.4 ± 1.7 years). Left ventriculography was performed at 14 days, 6 months, and 2 years after the onset of AMI. Plasma VEGF levels were significantly elevated and reached a peak on day 6. Peak plasma VEGF levels positively correlated with both end-diastolic and end-systolic volume indices at 14 days after the onset of AMI. When patients with AMI were divided into two groups according to plasma VEGF levels on admission, left ventricular volume indices were higher in the high VEGF group than in the low VEGF group at the subacute phase of AMI (14 days). These differences were no longer present in the chronic phase of AMI. CONCLUSION Plasma VEGF levels were increased in patients with AMI, and peak levels were associated with left ventricular volume indices in the subacute phase, suggesting an important role of endogenous VEGF in the left ventricular dimension in patients with AMI.
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Affiliation(s)
- Hiroto Shimokawahara
- Institute for Clinical Research and Division of Cardiology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - Michihisa Jougasaki
- Institute for Clinical Research and Division of Cardiology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan.
| | - Manabu Setoguchi
- Institute for Clinical Research and Division of Cardiology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - Tomoko Ichiki
- Institute for Clinical Research and Division of Cardiology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - Masahiro Sonoda
- Institute for Clinical Research and Division of Cardiology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - Norihito Nuruki
- Institute for Clinical Research and Division of Cardiology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - Hitoshi Nakashima
- Institute for Clinical Research and Division of Cardiology, National Hospital Organization Kagoshima Medical Center, Kagoshima, Japan
| | - Toyoaki Murohara
- Department of Cardiology, Nagoya University Graduate School of Medicine, Nagoya, Japan
| | - Hirohito Tsubouchi
- Department of Digestive and Life-Style Related Disease, Health Research Course, Human and Environmental Science, Kagoshima University Graduate School of Medicine and Dental Science, Kagoshima, Japan
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Huang Y, Wu D, Zhang X, Jiang M, Hu C, Lin J, Tang J, Wu L. Cardiac-specific Traf2 overexpression enhances cardiac hypertrophy through activating AKT/GSK3β signaling. Gene 2014; 536:225-31. [DOI: 10.1016/j.gene.2013.12.052] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2013] [Revised: 12/16/2013] [Accepted: 12/24/2013] [Indexed: 12/11/2022]
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Lin Q, Huang Y, Booth CJ, Haase VH, Johnson RS, Celeste Simon M, Giordano FJ, Yun Z. Activation of hypoxia-inducible factor-2 in adipocytes results in pathological cardiac hypertrophy. J Am Heart Assoc 2013; 2:e000548. [PMID: 24326162 PMCID: PMC3886757 DOI: 10.1161/jaha.113.000548] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Background Obesity can cause structural and functional abnormalities of the heart via complex but largely undefined mechanisms. Emerging evidence has shown that obesity results in reduced oxygen concentrations, or hypoxia, in adipose tissue. We hypothesized that the adipocyte hypoxia‐signaling pathway plays an essential role in the development of obesity‐associated cardiomyopathy. Methods and Results Using a mouse model in which the hypoxia‐inducible factor (HIF) pathway is activated by deletion of the von Hippel–Lindau gene specifically in adipocytes, we found that mice with adipocyte–von Hippel–Lindau deletion developed lethal cardiac hypertrophy. HIF activation in adipocytes results in overexpression of key cardiomyopathy‐associated genes in adipose tissue, increased serum levels of several proinflammatory cytokines including interleukin‐1β and monocyte chemotactic protein‐1, and activation of nuclear factor–κB and nuclear factor of activated T cells in the heart. Interestingly, genetic deletion of Hif2a, but not Hif1a, was able to rescue cardiac hypertrophy and abrogate adipose inflammation. Conclusion We have discovered a previously uncharacterized mechanism underlying a critical and direct role of the adipocyte HIF‐2 transcription factor in the development of adipose inflammation and pathological cardiac hypertrophy.
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Affiliation(s)
- Qun Lin
- Department of Therapeutic Radiology, Yale School of Medicine, New Haven, CT
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Tamori Y, Deng WM. Compensatory cellular hypertrophy: the other strategy for tissue homeostasis. Trends Cell Biol 2013; 24:230-7. [PMID: 24239163 DOI: 10.1016/j.tcb.2013.10.005] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Revised: 10/16/2013] [Accepted: 10/18/2013] [Indexed: 12/16/2022]
Abstract
Metazoan tissues have the ability to maintain tissue size and morphology while eliminating aberrant or damaged cells. In the tissue homeostasis system, cell division is the primary strategy cells use not only to increase tissue size during development but also to compensate for cell loss in tissue repair. Recent studies in Drosophila, however, have shown that cells in postmitotic tissues undergo hypertrophic growth without division, contributing to tissue repair as well as organ development. Indeed, similar compensatory cellular hypertrophy (CCH) can be observed in different contexts such as mammalian hepatocytes or corneal endothelial cells. Here we highlight these findings and discuss the underlying mechanisms of CCH, which is likely an evolutionarily conserved strategy for homeostatic tissue growth in metazoans.
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Affiliation(s)
- Yoichiro Tamori
- Department of Biological Science, Florida State University, Tallahassee, FL 32306-4295, USA
| | - Wu-Min Deng
- Department of Biological Science, Florida State University, Tallahassee, FL 32306-4295, USA.
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Growth inhibition and compensation in response to neonatal hypoxia in rats. Pediatr Res 2013; 74:111-20. [PMID: 23842077 PMCID: PMC3737398 DOI: 10.1038/pr.2013.80] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/24/2012] [Accepted: 12/30/2012] [Indexed: 02/06/2023]
Abstract
BACKGROUND Hypoxia (Hx) is an important disease mechanism in prematurity, childhood asthma, and obesity. In children, Hx results in chronic inflammation. METHODS We investigated the effects of Hx (12% O2) during postnatal days 2-20 in rats. Control groups were normoxic control (Nc), and normoxic growth restricted (Gr) (14-pup litters). RESULTS The Hx-exposed and Gr rats had similar decreases in growth. Hx increased plasma tumor necrosis factor-α (TNF-α) and interleukin 6 (IL-6) levels and decreased insulin-like growth factor 1 (IGF-I) and vascular endothelial growth factor (VEGF) levels. Hx resulted in hypertrophy of the right ventricle (RV) but disproportionate decrements in limb skeletal muscle (SM) growth. miR-206 was depressed in the hypertrophied RV of Hx rats but was increased in growth-retarded SM. Hx resulted in decreased RV messenger RNA (mRNA) level for myostatin but had no effect on SM myostatin. The mRNA for Hx-sensitive factors such as hypoxia inducible factor-1α (HIF-1α) was depressed in the RV of Hx rats, suggesting negative feedback. CONCLUSION The results indicate that Hx induces a proinflammatory state that depresses growth-regulating mechanisms and that tissues critical for survival, such as the heart, can escape from this general regulatory program to sustain life. This study identifies accessible biomarkers for evaluating the impact of interventions designed to mitigate the long-term deleterious consequences of Hx that all too often occur in babies born prematurely.
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Tamori Y, Deng WM. Tissue repair through cell competition and compensatory cellular hypertrophy in postmitotic epithelia. Dev Cell 2013; 25:350-63. [PMID: 23685249 DOI: 10.1016/j.devcel.2013.04.013] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Revised: 02/19/2013] [Accepted: 04/23/2013] [Indexed: 12/14/2022]
Abstract
In multicellular organisms, tissue integrity and organ size are maintained through removal of aberrant or damaged cells and compensatory proliferation. Little is known, however, about this homeostasis system in postmitotic tissues, where tissue-intrinsic genetic programs constrain cell division and new cells no longer arise from stem cells. Here we show that, in postmitotic Drosophila follicular epithelia, aberrant but viable cells are eliminated through cell competition, and the resulting loss of local tissue volume triggers sporadic cellular hypertrophy to repair the tissue. This "compensatory cellular hypertrophy" is implemented by acceleration of the endocycle, a variant cell cycle composed of DNA synthesis and gap phases without mitosis, dependent on activation of the insulin/IGF-like signaling pathway. These results reveal a remarkable homeostatic mechanism in postmitotic epithelia that ensures not only elimination of aberrant cells through cell competition but also proper organ-size control that involves compensatory cellular hypertrophy induced by physical parameters.
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Affiliation(s)
- Yoichiro Tamori
- Department of Biological Science, Florida State University, Tallahassee, FL 32306-4295, USA
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Chiu CL, Morgan CT, Lupton SJ, Lind JM. Parent of origin influences the cardiac expression of vascular endothelial growth factor (Vegfa). BMC MEDICAL GENETICS 2013; 14:43. [PMID: 23560444 PMCID: PMC3626619 DOI: 10.1186/1471-2350-14-43] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/21/2012] [Accepted: 03/25/2013] [Indexed: 11/10/2022]
Abstract
Background Vascular endothelial growth factor A (VEGFA) is a major regulator of both physiological and pathological angiogenesis. Associations between polymorphisms in VEGFA and complex disease have been inconsistent. The parent from whom the allele was inherited may account for these inconsistencies. This study examined the parent of origin effect on the expression of murine Vegfa. Methods Two homozygous, inbred mouse strains A/J (AJ) and 129x1/SvJ (129) were crossed to produce reciprocal AJ129 and 129AJ offspring, respectively. RNA was extracted from cardiac tissue of 6 week old male (n = 8) and female (n = 8) parental, and male and female F1 offspring mice (AJ129 n = 8 and 129AJ n = 8). Vegfa and Hif1a expression levels were measured by qPCR and compared between the F1 offspring from the reciprocal crosses. Results We found significant differences in the expression of Vegfa in F1 offspring (AJ129 and 129AJ mice) of the reciprocal crosses between AJ and 129 mice. Offspring of male AJ mice had significantly higher expression of Vegfa than offspring of male 129 mice (p = 0.006). This difference in expression was not the result of preferential allele expression (allelic imbalance). Expression of Hif1a, a transcriptional regulator of Vegfa expression, was also higher in F1 offspring of an AJ father (p = 0.004). Conclusion Differences in Vegfa and Hif1a gene expression are likely the result of an upstream angiogenic regulator gene that is influenced by the parent of origin. These results highlight the importance of including inheritance information, such as parent of origin, when undertaking allelic association studies.
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Affiliation(s)
- Christine L Chiu
- University of Western Sydney, School of Medicine, Penrith, NSW 2751, Locked Bag 1797, Australia.
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Kim HN, Jiao A, Hwang NS, Kim MS, Kang DH, Kim DH, Suh KY. Nanotopography-guided tissue engineering and regenerative medicine. Adv Drug Deliv Rev 2013; 65:536-58. [PMID: 22921841 PMCID: PMC5444877 DOI: 10.1016/j.addr.2012.07.014] [Citation(s) in RCA: 253] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2012] [Revised: 07/19/2012] [Accepted: 07/23/2012] [Indexed: 12/14/2022]
Abstract
Human tissues are intricate ensembles of multiple cell types embedded in complex and well-defined structures of the extracellular matrix (ECM). The organization of ECM is frequently hierarchical from nano to macro, with many proteins forming large scale structures with feature sizes up to several hundred microns. Inspired from these natural designs of ECM, nanotopography-guided approaches have been increasingly investigated for the last several decades. Results demonstrate that the nanotopography itself can activate tissue-specific function in vitro as well as promote tissue regeneration in vivo upon transplantation. In this review, we provide an extensive analysis of recent efforts to mimic functional nanostructures in vitro for improved tissue engineering and regeneration of injured and damaged tissues. We first characterize the role of various nanostructures in human tissues with respect to each tissue-specific function. Then, we describe various fabrication methods in terms of patterning principles and material characteristics. Finally, we summarize the applications of nanotopography to various tissues, which are classified into four types depending on their functions: protective, mechano-sensitive, electro-active, and shear stress-sensitive tissues. Some limitations and future challenges are briefly discussed at the end.
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Affiliation(s)
- Hong Nam Kim
- Division of WCU Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Republic of Korea
| | - Alex Jiao
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
| | - Nathaniel S. Hwang
- School of Chemical and Biological Engineering, Institute for Chemical Processing, Seoul National University, Seoul 151-742, Republic of Korea
| | - Min Sung Kim
- Division of WCU Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Republic of Korea
| | - Do Hyun Kang
- Division of WCU Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Republic of Korea
| | - Deok-Ho Kim
- Department of Bioengineering, University of Washington, Seattle, WA 98195, USA
- Institute for Stem Cell and Regenerative Medicine, University of Washington, Seattle, WA 98109, USA
| | - Kahp-Yang Suh
- Division of WCU Multiscale Mechanical Design, School of Mechanical and Aerospace Engineering, Seoul National University, Seoul 151-742, Republic of Korea
- Institute of Biological Engineering, Seoul National University, Seoul 151-742, Republic of Korea
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Boccafoschi F, Mosca C, Ramella M, Valente G, Cannas M. The effect of mechanical strain on soft (cardiovascular) and hard (bone) tissues: common pathways for different biological outcomes. Cell Adh Migr 2013; 7:165-73. [PMID: 23287581 PMCID: PMC3954035 DOI: 10.4161/cam.23020] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Mechanical stress plays a pivotal role in developing and maintaining tissues functionalities. Cells are constantly subjected to strain and compressive forces that are sensed by specialized membrane mechanosensors and converted in biochemical signals able to differently influence cellular behavior in terms of surviving, differentiation and extracellular matrix remodeling. This review focuses on the effects of mechanical strain on soft and hard tissues. Unexpectedly, different cells share almost the same membrane mechanosensors and the relative intracellular pathways, but to ultimately obtain very different biological effects. The events occurring in cardiovascular and bone tissues are treated in details, showing that integrins, cadherins, growth factor receptors and ions channels specifically expressed in the different tissues are the major actors of the sight. However, MAPkinases and RhoGTPases are mainly involved in the biochemical intracellular signaling directed to nuclear modifications.
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Affiliation(s)
- Francesca Boccafoschi
- Department of Health Sciences, University of Piemonte Orientale A. Avogadro, Novara, Italy.
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Kolovou G, Kolovou V, Vasiliadis I, Giannakopoulou V, Mihas C, Bilianou H, Kollia A, Papadopoulou E, Marvaki A, Goumas G, Kalogeropoulos P, Limperi S, Katsiki N, Mavrogeni S. The frequency of 4 common gene polymorphisms in nonagenarians, centenarians, and average life span individuals. Angiology 2013; 65:210-5. [PMID: 23389097 DOI: 10.1177/0003319712475075] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
Abstract
Single nucleotide polymorphisms of angiotensin-converting enzyme (ACE) such as rs1799752, nuclear factor kappa B (NFkB) such as rs28362491 and cholesteryl ester transport protein (CETP) such as rs708272 (TaqB1) and rs5882 (I405V) were evaluated in nonagenarians, centenarians, and average life span individuals (controls). The study population (n = 307; 190 nonagenarians, 12 centenarians and 105 middle-aged controls) was genotyped for ACE, NFkB, and CETP genetic variants. The age of nonagenarian and centenarian group ranged between 90 and 111 years; centenarians and controls age ranged from 99 to 111, and from 18 to 80 years, respectively. The I carriers of ACE I/D gene were fewer in nonagenarians compared to centenarians (37.6% vs 62.5%, P = .016). The I carriers of ACE gene were more frequent in centenarians compared to controls (62% vs 41%, P = .045). No differences in frequency of common NFkB and CETP genotypes between patients with exceptional longevity and middle-aged patients were observed.
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Affiliation(s)
- Genovefa Kolovou
- 1Cardiology Department, Onassis Cardiac Surgery Center Athens, Greece
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Zampetti A, Gnarra M, Borsini W, Giurdanella F, Antuzzi D, Piras A, Smaldone C, Pieroni M, Cadeddu C, de Waure C, Feliciani C. Vascular endothelial growth factor (VEGF-a) in Fabry disease: association with cutaneous and systemic manifestations with vascular involvement. Cytokine 2013; 61:933-9. [PMID: 23332617 DOI: 10.1016/j.cyto.2012.12.011] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2012] [Revised: 12/08/2012] [Accepted: 12/12/2012] [Indexed: 10/27/2022]
Abstract
INTRODUCTION Fabry disease is an X-linked inherited metabolic disorder characterized by the deficiency of lysosomal α-galactosidase A enzyme. This leads to the accumulation, into lysosomes through the body, of glycosphingolipids, mainly Gb3. Skin involvement and progressive multi-organ failure are usually observed. Endothelium is the preferential target of the Gb3 storage that determines endothelial dysfunction and vasculopathy leading to the clinical manifestations of the disease. The serum levels of Vascular Endothelial Growth Factor-A (VEGF-A), a specific endothelial cell mitogen, were analyzed in Fabry patients to explore a possible association to the clinical manifestations with vascular involvement. METHODS Thirty-five patients with a biochemical and genetic diagnosis of Fabry disease, along with an age-gender-matched healthy control group, were enrolled. Serum samples were collected and analyzed by ELISA. The genetic mutations, the specific organ dysfunction, and the cardiovascular risk factors such as dyslipidaemia, diabetes, smoking habits and hypertension were evaluated in Fabry patients. RESULTS The mean serum level of VEGF-A in Fabry patients group was significantly higher than in the control group (P=0.006). A statistical significant association, between VEGF-A levels and the skin manifestation including angiokeratomas, sweating abnormalities and Fabry Facies was found. An association was also found between high VEGF-A and specific GLA mutations, the male gender, the renal and neurological manifestations, the presence of eye vessels tortuosity, smoking habit and hypertension. CONCLUSIONS We detected increased VEGF-A levels in patients with Fabry disease compared to the controls, and we hypothesized that this could be a response to the vascular damage characterising this lysosomal disorder. However, further studies are necessary to clarify the role of VEGF-A in Fabry.
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Affiliation(s)
- Anna Zampetti
- Dermatology Department, Policlinico A. Gemelli, Università Cattolica, Rome, Italy.
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Kumar R, Yong QC, Thomas CM. Do multiple nuclear factor kappa B activation mechanisms explain its varied effects in the heart? Ochsner J 2013; 13:157-165. [PMID: 23532211 PMCID: PMC3603179] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/02/2023] Open
Abstract
BACKGROUND Multiple studies have demonstrated the important role of the nuclear factor kappa B (NF-κB) in cardiac pathology. However, these studies' conclusions differ regarding whether NF-κB is protective or detrimental for heart function. This disagreement is not surprising considering the complexity of NF-κB signaling that involves multiple components and regulation at several steps. Furthermore, NF-κB is a pleiotropic transcription factor that receives signals from multiple pathways, including the renin-angiotensin system (RAS) and cytokines, 2 important modulators of cardiac remodeling. METHODS In this article, we review studies related to the role and mechanisms of NF-κB activation in the heart, particularly with regard to the RAS, inflammation, and diabetes. The objective of this review is to consolidate multiple, often contradictory, findings to develop a clear understanding of NF-κB signaling in the heart. CONCLUSIONS The studies we review demonstrate that NF-κB effects in the heart are mechanism specific and that NF-κB signaling is cyclical. Consequently, the timing of NF-κB measurement is critical, and studies focused on temporal changes in the NF-κB mechanism would help clarify its multiple roles in cardiac pathophysiology.
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Affiliation(s)
- Rajesh Kumar
- Division of Molecular Cardiology, College of Medicine, Texas A&M Health Science Center, Scott & White Healthcare, and Central Texas Veterans Health Care System, Temple, TX
| | - Qian Chen Yong
- Division of Molecular Cardiology, College of Medicine, Texas A&M Health Science Center, Scott & White Healthcare, and Central Texas Veterans Health Care System, Temple, TX
| | - Candice M. Thomas
- Division of Molecular Cardiology, College of Medicine, Texas A&M Health Science Center, Scott & White Healthcare, and Central Texas Veterans Health Care System, Temple, TX
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Lu L, Mende M, Yang X, Körber HF, Schnittler HJ, Weinert S, Heubach J, Werner C, Ravens U. Design and validation of a bioreactor for simulating the cardiac niche: a system incorporating cyclic stretch, electrical stimulation, and constant perfusion. Tissue Eng Part A 2012; 19:403-14. [PMID: 22991978 DOI: 10.1089/ten.tea.2012.0135] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
To simulate the cardiac niche, a bioreactor system was designed and constructed to incorporate cyclic stretch, rhythmic electrical stimulation, and constant perfusion. The homogeneity of surface strain distribution across the cell culture substrate was confirmed with ARAMIS deformation analysis. The proliferation marker, Ki-67, detected in human umbilical vein endothelial cells and 3-[4,5-dimethyl-thiazol-2-yl]-2,5-diphenyltetrazolium bromide cytotoxicity assay performed on human atrial fibroblasts confirmed biocompatibility of this novel device. Cyclic stretch treatment for 24 h resulted in the perpendicular alignment of human atrial fibroblasts. An electrical stimulation system containing carbon electrodes was characterized by electrochemical impedance spectroscopy and charge injection/recovery studies, which indicated that increased corrosive reactions were associated with a higher input voltage and prolonged pulse duration. Field stimulation delivered through this system could induce rhythmic contractions in adult rat ventricular myocytes, with contractile characteristics similar to those paced in a standard field stimulation chamber. In conclusion, this bioreactor provides a novel tool to study the interaction between physical stimulation and cardiac cell physiology.
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Affiliation(s)
- Liang Lu
- Department of Pharmacology and Toxicology, Medical Faculty Carl Gustav Carus, Dresden University of Technology, Dresden, Germany
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Abstract
Purinergic receptors have attracted growing interest as therapeutic targets. This perspective focuses on P2X(4) receptors as a new cardioprotective target in heart failure.
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Affiliation(s)
- Ronghua Yang
- Calhoun Cardiovascular Center, University of Connecticut Health Center School of Medicine, Farmington, CT 06030, USA
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Tisato V, Zauli G, Voltan R, Gianesini S, di Iasio MG, Volpi I, Fiorentini G, Zamboni P, Secchiero P. Endothelial cells obtained from patients affected by chronic venous disease exhibit a pro-inflammatory phenotype. PLoS One 2012; 7:e39543. [PMID: 22737245 PMCID: PMC3380919 DOI: 10.1371/journal.pone.0039543] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2012] [Accepted: 05/22/2012] [Indexed: 01/10/2023] Open
Abstract
Background The inflammatory properties of vein endothelium in relation to chronic venous disease (CVD) have been poorly investigated. Therefore, new insights on the characteristics of large vein endothelium would increase our knowledge of large vessel physiopathology. Methodology/Principal Findings Surgical specimens of veins were obtained from the tertiary venous network (R3) and/or saphenous vein (SF) of patients affected by CVD and from control individuals. Highly purified venous endothelial cell (VEC) cultures obtained from CVD patients were characterized for morphological, phenotypic and functional properties compared to control VEC. An increase of CD31/PECAM-1, CD146 and ICAM-1 surface levels was documented at flow cytometry in pathological VEC with respect to normal controls. Of note, the strongest expression of these pro-inflammatory markers was observed in VEC obtained from patients with more advanced disease. Similarly, spontaneous cell proliferation and resistance to starvation was higher in pathological than in normal VEC, while the migratory response of VEC showed an opposite trend, being significantly lower in VEC obtained from pathological specimens. In addition, in keeping with a higher baseline transcriptional activity of NF-kB, the release of the pro-inflammatory cytokines osteoprotegerin (OPG) and vascular endothelial growth factor (VEGF) was higher in pathological VEC cultures with respect to control VEC. Interestingly, there was a systemic correlation to these in vitro data, as demonstrated by higher serum OPG and VEGF levels in CVD patients with respect to normal healthy controls. Conclusion/Significance Taken together, these data indicate that large vein endothelial cells obtained from CVD patients exhibit a pro-inflammatory phenotype, which might significantly contribute to systemic inflammation in CVD patients.
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Affiliation(s)
- Veronica Tisato
- Department of Morphology and Embryology and LTTA Centre, University of Ferrara, Ferrara, Italy
| | - Giorgio Zauli
- Institute for Maternal and Child Health, IRCCS Burlo Garofolo, Trieste, Italy
| | - Rebecca Voltan
- Department of Morphology and Embryology and LTTA Centre, University of Ferrara, Ferrara, Italy
| | | | - Maria Grazia di Iasio
- Department of Morphology and Embryology and LTTA Centre, University of Ferrara, Ferrara, Italy
| | - Ilaria Volpi
- Department of Morphology and Embryology and LTTA Centre, University of Ferrara, Ferrara, Italy
| | | | - Paolo Zamboni
- Vascular Disease Center, University of Ferrara, Ferrara, Italy
| | - Paola Secchiero
- Department of Morphology and Embryology and LTTA Centre, University of Ferrara, Ferrara, Italy
- * E-mail:
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