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Wang X, Li Q, Hu Q, Suntharalingam P, From AHL, Zhang J. Intra-myocardial injection of both growth factors and heart derived Sca-1+/CD31- cells attenuates post-MI LV remodeling more than does cell transplantation alone: neither intervention enhances functionally significant cardiomyocyte regeneration. PLoS One 2014; 9:e95247. [PMID: 24919180 PMCID: PMC4053321 DOI: 10.1371/journal.pone.0095247] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2014] [Accepted: 03/24/2014] [Indexed: 01/24/2023] Open
Abstract
Insulin-like growth factor 1 (IGF-1) and hepatocyte growth factor (HGF) are two potent cell survival and regenerative factors in response to myocardial injury (MI). We hypothesized that simultaneous delivery of IGF+HGF combined with Sca-1+/CD31− cells would improve the outcome of transplantation therapy in response to the altered hostile microenvironment post MI. One million adenovirus nuclear LacZ-labeled Sca-1+/CD31− cells were injected into the peri-infarction area after left anterior descending coronary artery (LAD) ligation in mice. Recombinant mouse IGF-1+HGF was added to the cell suspension prior to the injection. The left ventricular (LV) function was assessed by echocardiography 4 weeks after the transplantation. The cell engraftment, differentiation and cardiomyocyte regeneration were evaluated by histological analysis. Sca-1+/CD31− cells formed viable grafts and improved LV ejection fraction (EF) (Control, 54.5+/−2.4; MI, 17.6+/−3.1; Cell, 28.2+/−4.2, n = 9, P<0.01). IGF+HGF significantly enhanced the benefits of cell transplantation as evidenced by increased EF (38.8+/−2.2; n = 9, P<0.01) and attenuated adverse structural remodeling. Furthermore, IGF+HGF supplementation increased the cell engraftment rate, promoted the transplanted cell survival, enhanced angiogenesis, and minimally stimulated endogenous cardiomyocyte regeneration in vivo. The in vitro experiments showed that IGF+HGF treatment stimulated Sca-1+/CD31− cell proliferation and inhibited serum free medium induced apoptosis. Supperarray profiling of Sca-1+/CD31− cells revealed that Sca-1+/CD31− cells highly expressed various trophic factor mRNAs and IGF+HGF treatment altered the mRNAs expression patterns of these cells. These data indicate that IGF-1+HGF could serve as an adjuvant to cell transplantation for myocardial repair by stimulating donor cell and endogenous cardiac stem cell survival, regeneration and promoting angiogenesis.
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Affiliation(s)
- Xiaohong Wang
- Cardiovascular Division, Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, United States of America
- * E-mail: (XW); (JZ)
| | - Qinglu Li
- Cardiovascular Division, Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, United States of America
| | - Qingsong Hu
- Cardiovascular Division, Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, United States of America
| | - Piradeep Suntharalingam
- Cardiovascular Division, Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, United States of America
| | - Arthur H. L. From
- Cardiovascular Division, Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, United States of America
| | - Jianyi Zhang
- Cardiovascular Division, Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, United States of America
- * E-mail: (XW); (JZ)
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Zhang EY, Xiong Q, Ye L, Suntharalingam P, Wang X, Astle CM, Zhang J, Harrison DE. Fetal myocardium in the kidney capsule: an in vivo model of repopulation of myocytes by bone marrow cells. PLoS One 2012; 7:e31099. [PMID: 22383995 PMCID: PMC3285614 DOI: 10.1371/journal.pone.0031099] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Accepted: 01/02/2012] [Indexed: 11/25/2022] Open
Abstract
Debate surrounds the question of whether the heart is a post-mitotic organ in part due to the lack of an in vivo model in which myocytes are able to actively regenerate. The current study describes the first such mouse model — a fetal myocardial environment grafted into the adult kidney capsule. Here it is used to test whether cells descended from bone marrow can regenerate cardiac myocytes. One week after receiving the fetal heart grafts, recipients were lethally irradiated and transplanted with marrow from green fluorescent protein (GFP)-expressing C57Bl/6J (B6) donors using normal B6 recipients and fetal donors. Levels of myocyte regeneration from GFP marrow within both fetal myocardium and adult hearts of recipients were evaluated histologically. Fetal myocardium transplants had rich neovascularization and beat regularly after 2 weeks, continuing at checkpoints of 1, 2, 4, 6, 8 and12 months after transplantation. At each time point, GFP-expressing rod-shaped myocytes were found in the fetal myocardium, but only a few were found in the adult hearts. The average count of repopulated myocardium with green rod-shaped myocytes was 996.8 cells per gram of fetal myocardial tissue, and 28.7 cells per adult heart tissue, representing a thirty-five fold increase in fetal myocardium compared to the adult heart at 12 months (when numbers of green rod-shaped myocytes were normalized to per gram of myocardial tissue). Thus, bone marrow cells can differentiate to myocytes in the fetal myocardial environment. The novel in vivo model of fetal myocardium in the kidney capsule appears to be valuable for testing repopulating abilities of potential cardiac progenitors.
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Affiliation(s)
- Eric Y. Zhang
- The Jackson Laboratory, Bar Harbor, Maine, United States of America
| | - Qiang Xiong
- Division of Cardiology, Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, United States of America
| | - Lei Ye
- Division of Cardiology, Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, United States of America
| | - Piradeep Suntharalingam
- Division of Cardiology, Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, United States of America
| | - Xiaohong Wang
- Division of Cardiology, Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, United States of America
| | - C. Michael Astle
- The Jackson Laboratory, Bar Harbor, Maine, United States of America
| | - Jianyi Zhang
- Division of Cardiology, Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota, United States of America
- * E-mail: (JZ); david.harrison@.jax.org (DEH)
| | - David E. Harrison
- The Jackson Laboratory, Bar Harbor, Maine, United States of America
- * E-mail: (JZ); david.harrison@.jax.org (DEH)
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Xiong Q, Hill KL, Li Q, Suntharalingam P, Mansoor A, Wang X, Jameel MN, Zhang P, Swingen C, Kaufman DS, Zhang J. A fibrin patch-based enhanced delivery of human embryonic stem cell-derived vascular cell transplantation in a porcine model of postinfarction left ventricular remodeling. Stem Cells 2011; 29:367-75. [PMID: 21732493 DOI: 10.1002/stem.580] [Citation(s) in RCA: 106] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
It is unknown how to use human embryonic stem cell (hESC) to effectively treat hearts with postinfarction left ventricular (LV) remodeling. Using a porcine model of postinfarction LV remodeling, this study examined the functional improvement of enhanced delivery of combined transplantation of hESC-derived endothelial cells (ECs) and hESC-derived smooth muscle cells (SMCs) with a fibrin three-dimensional (3D) porous scaffold biomatrix. To facilitate tracking the transplanted cells, the hESCs were genetically modified to stably express green fluorescent protein and luciferase (GFP/Luc). Myocardial infarction (MI) was created by ligating the first diagonal coronary artery for 60 minutes followed by reperfusion. Two million each of GFP/Luc hESC-derived ECs and SMCs were seeded in the 3D porous biomatrix patch and applied to the region of ischemia/reperfusion for cell group (MI+P+C, n = 6), whereas biomatrix without cell (MI+P, n = 5), or saline only (MI, n = 5) were applied to control group hearts with same coronary artery ligation. Functional outcome (1 and 4 weeks follow-up) of stem cell transplantation was assessed by cardiac magnetic resonance imaging. The transplantation of hESC-derived vascular cells resulted in significant LV functional improvement. Significant engraftment of hESC-derived cells was confirmed by both in vivo and ex vivo bioluminescent imaging. The mechanism underlying the functional beneficial effects of cardiac progenitor transplantation is attributed to the increased neovascularization. These findings demonstrate a promising therapeutic potential of using these hESC-derived vascular cell types and the mode of patch delivery.
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Affiliation(s)
- Qiang Xiong
- Department of Medicine, University of Minnesota Medical School, Minneapolis, Minnesota 5545, USA
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Xiong Q, Du F, Zhu X, Zhang P, Suntharalingam P, Ippolito J, Kamdar FD, Chen W, Zhang J. ATP production rate via creatine kinase or ATP synthase in vivo: a novel superfast magnetization saturation transfer method. Circ Res 2011; 108:653-63. [PMID: 21293002 DOI: 10.1161/circresaha.110.231456] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
RATIONALE ³¹P magnetization saturation transfer (MST) experiment is the most widely used method to study ATP metabolism kinetics. However, its lengthy data acquisition time greatly limits the wide biomedical applications in vivo, especially for studies requiring high spatial and temporal resolutions. OBJECTIVE We aimed to develop a novel superfast MST method that can accurately quantify ATP production rate constants (k(f)) through creatine kinase (CK) or ATP synthase (ATPase) with 2 spectra. METHODS AND RESULTS The T₁(nom) (T₁ nominal) method uses a correction factor to compensate the partially relaxed MST experiments, thus allowing measurement of enzyme kinetics with an arbitrary repetition time and flip angle, which consequently reduces the data acquisition time of a transmurally differentiated CK k(f) measurement by 91% as compared with the conventional method with spatial localization. The novel T₁(nom) method is validated theoretically with numeric simulation, and further verified with in vivo swine hearts, as well as CK and ATPase activities in rat brain at 9.4 Tesla. Importantly, the in vivo data from swine hearts demonstrate, for the first time, that within an observation window of 30 minutes, the inhibition of CK activity by iodoacetamide does not limit left ventricular chamber contractile function. CONCLUSIONS A novel MST method for superfast examination of enzyme kinetics in vivo has been developed and verified theoretically and experimentally. In the in vivo normal heart, redundant multiple supporting systems of myocardial ATP production, transportation, and utilization exist, such that inhibition of one mechanism does not impair the normal left ventricular contractile performance.
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Affiliation(s)
- Qiang Xiong
- Cardiovascular Division, Department of Medicine, University of Minnesota, Minneapolis, USA
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Miller CE, Crisp D, DeCola PL, Olsen SC, Randerson JT, Michalak AM, Alkhaled A, Rayner P, Jacob DJ, Suntharalingam P, Jones DBA, Denning AS, Nicholls ME, Doney SC, Pawson S, Boesch H, Connor BJ, Fung IY, O'Brien D, Salawitch RJ, Sander SP, Sen B, Tans P, Toon GC, Wennberg PO, Wofsy SC, Yung YL, Law RM. Precision requirements for space-based data. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jd007659] [Citation(s) in RCA: 292] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- C. E. Miller
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - D. Crisp
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - P. L. DeCola
- Science Mission Directorate; NASA Headquarters; Washington, DC USA
| | - S. C. Olsen
- Los Alamos National Laboratory; Los Alamos New Mexico USA
| | - J. T. Randerson
- Department of Earth System Science; University of California; Irvine California USA
| | - A. M. Michalak
- Department of Civil and Environmental Engineering; The University of Michigan; Ann Arbor Michigan USA
- Department of Atmospheric, Oceanic, and Space Sciences; The University of Michigan; Ann Arbor Michigan USA
| | - A. Alkhaled
- Department of Civil and Environmental Engineering; The University of Michigan; Ann Arbor Michigan USA
| | - P. Rayner
- Laboratoire des Sciences du Climat et de l'Environnement/IPSL, CEA-CNRS-UVSQ; Gif-sur-Yvette France
| | - D. J. Jacob
- Division of Engineering and Applied Science; Harvard University; Cambridge Massachusetts USA
- Department of Earth and Planetary Sciences; Harvard University; Cambridge Massachusetts USA
| | - P. Suntharalingam
- Division of Engineering and Applied Science; Harvard University; Cambridge Massachusetts USA
- Department of Earth and Planetary Sciences; Harvard University; Cambridge Massachusetts USA
| | - D. B. A. Jones
- Department of Physics; University of Toronto; Toronto, Ontario Canada
| | - A. S. Denning
- Atmospheric Science Department; Colorado State University; Fort Collins Colorado USA
| | - M. E. Nicholls
- Atmospheric Science Department; Colorado State University; Fort Collins Colorado USA
| | - S. C. Doney
- Department of Marine Chemistry and Geochemistry; Woods Hole Oceanographic Institution; Woods Hole Massachusetts USA
| | - S. Pawson
- Goddard Earth Science and Technology Center; Baltimore Maryland USA
- Global Modeling and Assimilation Office; Code 610.1, NASA Goddard Space Flight Center; Greenbelt Maryland USA
| | - H. Boesch
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - B. J. Connor
- Atmospheric Research; National Institute of Water and Atmospheric Research; Central Otago, Omakau New Zealand
| | - I. Y. Fung
- Berkeley Atmospheric Sciences Center; University of California; Berkeley California USA
| | - D. O'Brien
- Atmospheric Science Department; Colorado State University; Fort Collins Colorado USA
| | - R. J. Salawitch
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - S. P. Sander
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - B. Sen
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - P. Tans
- Earth System Research Laboratory, Global Monitoring Division; NOAA; Boulder Colorado USA
| | - G. C. Toon
- Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
| | - P. O. Wennberg
- Division of Geological and Planetary Sciences; California Institute of Technology; Pasadena California USA
| | - S. C. Wofsy
- Division of Engineering and Applied Science; Harvard University; Cambridge Massachusetts USA
| | - Y. L. Yung
- Division of Geological and Planetary Sciences; California Institute of Technology; Pasadena California USA
| | - R. M. Law
- CSIRO Marine and Atmospheric Research; Aspendale Victoria Australia
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Zeng L, Hu Q, Wang X, Mansoor A, Lee J, Feygin J, Zhang G, Suntharalingam P, Boozer S, Mhashilkar A, Panetta CJ, Swingen C, Deans R, From AHL, Bache RJ, Verfaillie CM, Zhang J. Bioenergetic and functional consequences of bone marrow-derived multipotent progenitor cell transplantation in hearts with postinfarction left ventricular remodeling. Circulation 2007; 115:1866-75. [PMID: 17389266 DOI: 10.1161/circulationaha.106.659730] [Citation(s) in RCA: 220] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND The present study examined whether transplantation of adherent bone marrow-derived stem cells, termed pMultistem, induces neovascularization and cardiomyocyte regeneration that stabilizes bioenergetic and contractile function in the infarct zone and border zone (BZ) after coronary artery occlusion. METHODS AND RESULTS Permanent left anterior descending artery occlusion in swine caused left ventricular remodeling with a decrease of ejection fraction from 55+/-5.6% to 30+/-5.4% (magnetic resonance imaging). Four weeks after left anterior descending artery occlusion, BZ myocardium demonstrated profound bioenergetic abnormalities, with a marked decrease in subendocardial phosphocreatine/ATP (31P magnetic resonance spectroscopy; 1.06+/-0.30 in infarcted hearts [n=9] versus 1.90+/-0.15 in normal hearts [n=8; P<0.01]). This abnormality was significantly improved by transplantation of allogeneic pMultistem cells (subendocardial phosphocreatine/ATP to 1.34+/-0.29; n=7; P<0.05). The BZ protein expression of creatine kinase-mt and creatine kinase-m isoforms was significantly reduced in infarcted hearts but recovered significantly in response to cell transplantation. MRI demonstrated that the infarct zone systolic thickening fraction improved significantly from systolic "bulging" in untreated animals with myocardial infarction to active thickening (19.7+/-9.8%, P<0.01), whereas the left ventricular ejection fraction improved to 42.0+/-6.5% (P<0.05 versus myocardial infarction). Only 0.35+/-0.05% donor cells could be detected 4 weeks after left anterior descending artery ligation, independent of cell transplantation with or without immunosuppression with cyclosporine A (with cyclosporine A, n=6; no cyclosporine A, n=7). The fraction of grafted cells that acquired an endothelial or cardiomyocyte phenotype was 3% and approximately 2%, respectively. Patchy spared myocytes in the infarct zone were found only in pMultistem transplanted hearts. Vascular density was significantly higher in both BZ and infarct zone of cell-treated hearts than in untreated myocardial infarction hearts (P<0.05). CONCLUSIONS Thus, allogeneic pMultistem improved BZ energetics, regional contractile performance, and global left ventricular ejection fraction. These improvements may have resulted from paracrine effects that include increased vascular density in the BZ and spared myocytes in the infarct zone.
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Affiliation(s)
- Lepeng Zeng
- Department of Medicine, University of Minnesota Medical School, Minneapolis, Minn, USA
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Suntharalingam P. Estimating the distribution of terrestrial CO2sources and sinks from atmospheric measurements: Sensitivity to configuration of the observation network. ACTA ACUST UNITED AC 2003. [DOI: 10.1029/2002jd002207] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Suntharalingam P, Spencer H, Gallant CV, Martin NL. Salmonella enterica serovar typhimurium rdoA is growth phase regulated and involved in relaying Cpx-induced signals. J Bacteriol 2003; 185:432-43. [PMID: 12511488 PMCID: PMC145337 DOI: 10.1128/jb.185.2.432-443.2003] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The disulfide oxidoreductase, DsbA, mediates disulfide bond formation in proteins as they enter or pass through the periplasm of gram-negative bacteria. Although DsbA function has been well characterized, less is known about the factors that control its expression. Previous studies with Escherichia coli demonstrated that dsbA is part of a two-gene operon that includes an uncharacterized, upstream gene, yihE, that is positively regulated via the Cpx stress response pathway. To clarify the role of the yihE homologue on dsbA expression in Salmonella enterica serovar Typhimurium, the effect of this gene (termed rdoA) on the regulation of dsbA expression was investigated. Transcriptional assays assessing rdoA promoter activity showed growth phase-dependent expression with maximal activity in stationary phase. Significant quantities of rdoA and dsbA transcripts exist in serovar Typhimurium, but only extremely low levels of rdoA-dsbA cotranscript were detected. Activation of the Cpx system in serovar Typhimurium increased synthesis of both rdoA- and dsbA-specific transcripts but did not significantly alter the levels of detectable cotranscript. These results indicate that Cpx-mediated induction of dsbA transcription in serovar Typhimurium does not occur through an rdoA-dsbA cotranscript. A deletion of the rdoA coding region was constructed to definitively test the relevance of the rdoA-dsbA cotranscript to dsbA expression. The absence of RdoA affects DsbA expression levels when the Cpx system is activated, and providing rdoA in trans complements this phenotype, supporting the hypothesis that a bicistronic mechanism is not involved in serovar Typhimurium dsbA regulation. The rdoA null strain was also shown to be altered in flagellar phase variation. First it was found that induction of the Cpx stress response pathway switched flagellar synthesis to primarily phase 2 flagellin, and this effect was then found to be abrogated in the rdoA null strain, suggesting the involvement of RdoA in mediating Cpx-related signaling.
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Affiliation(s)
- P Suntharalingam
- Department of Microbiology and Immunology, Queen's University, Kingston, Ontario, Canada K7L 3N6
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Abstract
Northern blot analyses, transcription assays using a dsbA::lacZ transcriptional fusion, and primer extension mapping were used to characterize the promoter region of dsbA from Salmonella typhimurium. Transcription assays measuring promoter activity of a 258-bp segment of DNA immediately upstream of the dsbA translational start site showed strong growth-phase dependence, with maximal expression in stationary phase and high levels of expression maintained for at least 72 h. This expression was not RpoS-dependent. Two transcripts initiating in the dsbA promoter region were mapped by primer extension analysis and their levels were monitored by Northern blot analysis. Growth conditions such as pH and O(2) levels affected dsbA transcription independently of growth phase. The data suggests that the promoter region of S. typhimurium is not constitutively activated. Its regulation may reflect a requirement for DsbA during conditions resulting in stationary-phase-like growth in the environment.
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Affiliation(s)
- M Goecke
- Department of Microbiology and Immunology, Queen's University, Kingston, ON, Canada K7L 3N6
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