1
|
Quijada P, Park S, Zhao P, Kolluri KS, Wong D, Shih KD, Fang K, Pezhouman A, Wang L, Daraei A, Tran MD, Rathbun EM, Burgos Villar KN, Garcia-Hernandez ML, Pham TT, Lowenstein CJ, Iruela-Arispe ML, Carmichael ST, Small EM, Ardehali R. Cardiac pericytes mediate the remodeling response to myocardial infarction. J Clin Invest 2023; 133:e162188. [PMID: 37183820 PMCID: PMC10178847 DOI: 10.1172/jci162188] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2022] [Accepted: 03/28/2023] [Indexed: 05/16/2023] Open
Abstract
Despite the prevalence of pericytes in the microvasculature of the heart, their role during ischemia-induced remodeling remains unclear. We used multiple lineage-tracing mouse models and found that pericytes migrated to the injury site and expressed profibrotic genes, coinciding with increased vessel leakage after myocardial infarction (MI). Single-cell RNA-Seq of cardiac pericytes at various time points after MI revealed the temporally regulated induction of genes related to vascular permeability, extracellular matrix production, basement membrane degradation, and TGF-β signaling. Deleting TGF-β receptor 1 in chondroitin sulfate proteoglycan 4-expressing (Cspg4-expressing) cells reduced fibrosis following MI, leading to a transient improvement in the cardiac ejection fraction. Furthermore, genetic ablation of Cspg4-expressing cells resulted in excessive vascular permeability, a decline in cardiac function, and increased mortality in the second week after MI. These data reveal an essential role for cardiac pericytes in the control of vascular homeostasis and the fibrotic response after acute ischemic injury, information that will help guide the development of novel strategies to preserve vascular integrity and attenuate pathological cardiac remodeling.
Collapse
Affiliation(s)
- Pearl Quijada
- Department of Integrative Biology and Physiology
- Eli and Edythe Broad Stem Research Center
- Molecular Biology Institute
- Molecular, Cellular, and Integrative Physiology Graduate Program, and
| | - Shuin Park
- Molecular, Cellular, and Integrative Physiology Graduate Program, and
- Cardiology, Internal Medicine, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | - Peng Zhao
- Eli and Edythe Broad Stem Research Center
- Cardiology, Internal Medicine, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | - Kamal S.S. Kolluri
- Cardiology, Internal Medicine, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | - David Wong
- Department of Integrative Biology and Physiology
- Molecular, Cellular, and Integrative Physiology Graduate Program, and
| | | | - Kai Fang
- Cardiology, Internal Medicine, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | - Arash Pezhouman
- Section of Cardiology, Department of Internal Medicine, Baylor College of Medicine, Houston, Texas, USA
- The Texas Heart Institute, Houston, Texas, USA
| | - Lingjun Wang
- Cardiology, Internal Medicine, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
- Cardiology, Second Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Ali Daraei
- Cardiology, Internal Medicine, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | | | - Elle M. Rathbun
- Department of Neurology, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | - Kimberly N. Burgos Villar
- Department of Pathology
- Department of Medicine, Aab Cardiovascular Research Institute, School of Medicine and Dentistry, and
| | | | - Thanh T.D. Pham
- Department of Neurology, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | - Charles J. Lowenstein
- Division of Cardiology, Department of Medicine, Johns Hopkins University School of Medicine, Maryland, USA
| | - M. Luisa Iruela-Arispe
- Department of Cell and Developmental Biology, Feinberg School of Medicine, Northwestern University, Chicago, Illinois, USA
| | - S. Thomas Carmichael
- Eli and Edythe Broad Stem Research Center
- Department of Neurology, David Geffen School of Medicine, UCLA, Los Angeles, California, USA
| | - Eric M. Small
- Department of Medicine, Aab Cardiovascular Research Institute, School of Medicine and Dentistry, and
- Department of Pharmacology and Physiology and
- Department of Biomedical Engineering, University of Rochester, Rochester, New York, USA
| | - Reza Ardehali
- Section of Cardiology, Department of Internal Medicine, Baylor College of Medicine, Houston, Texas, USA
- The Texas Heart Institute, Houston, Texas, USA
| |
Collapse
|
2
|
Burke RM, Dirkx RA, Quijada P, Lighthouse JK, Mohan A, O'Brien M, Wojciechowski W, Woeller CF, Phipps RP, Alexis JD, Ashton JM, Small EM. Prevention of Fibrosis and Pathological Cardiac Remodeling by Salinomycin. Circ Res 2021; 128:1663-1678. [PMID: 33825488 DOI: 10.1161/circresaha.120.317791] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
[Figure: see text].
Collapse
Affiliation(s)
- Ryan M Burke
- Aab Cardiovascular Research Institute, Department of Medicine (R.M.B., R.A.D., P.Q., J.K.L., A.M., E.M.S.), University of Rochester School of Medicine and Dentistry, NY
| | - Ronald A Dirkx
- Aab Cardiovascular Research Institute, Department of Medicine (R.M.B., R.A.D., P.Q., J.K.L., A.M., E.M.S.), University of Rochester School of Medicine and Dentistry, NY
| | - Pearl Quijada
- Aab Cardiovascular Research Institute, Department of Medicine (R.M.B., R.A.D., P.Q., J.K.L., A.M., E.M.S.), University of Rochester School of Medicine and Dentistry, NY
| | - Janet K Lighthouse
- Aab Cardiovascular Research Institute, Department of Medicine (R.M.B., R.A.D., P.Q., J.K.L., A.M., E.M.S.), University of Rochester School of Medicine and Dentistry, NY
| | - Amy Mohan
- Aab Cardiovascular Research Institute, Department of Medicine (R.M.B., R.A.D., P.Q., J.K.L., A.M., E.M.S.), University of Rochester School of Medicine and Dentistry, NY
| | - Meghann O'Brien
- Genomics Research Center (M.O., W.W., J.M.A.), University of Rochester School of Medicine and Dentistry, NY
| | - Wojciech Wojciechowski
- Genomics Research Center (M.O., W.W., J.M.A.), University of Rochester School of Medicine and Dentistry, NY
| | - Collynn F Woeller
- Environmental Medicine (C.F.W., R.P.P.), University of Rochester School of Medicine and Dentistry, NY.,Department of Medicine (C.F.W., R.P.P., J.D.A., E.M.S.), University of Rochester School of Medicine and Dentistry, NY
| | - Richard P Phipps
- Environmental Medicine (C.F.W., R.P.P.), University of Rochester School of Medicine and Dentistry, NY.,Department of Medicine (C.F.W., R.P.P., J.D.A., E.M.S.), University of Rochester School of Medicine and Dentistry, NY
| | - Jeffrey D Alexis
- Department of Medicine (C.F.W., R.P.P., J.D.A., E.M.S.), University of Rochester School of Medicine and Dentistry, NY
| | - John M Ashton
- Genomics Research Center (M.O., W.W., J.M.A.), University of Rochester School of Medicine and Dentistry, NY
| | - Eric M Small
- Aab Cardiovascular Research Institute, Department of Medicine (R.M.B., R.A.D., P.Q., J.K.L., A.M., E.M.S.), University of Rochester School of Medicine and Dentistry, NY.,Department of Medicine (C.F.W., R.P.P., J.D.A., E.M.S.), University of Rochester School of Medicine and Dentistry, NY.,Pharmacology and Physiology (E.M.S.), University of Rochester School of Medicine and Dentistry, NY.,Biomedical Engineering, University of Rochester, NY (E.M.S.)
| |
Collapse
|
3
|
Abstract
The heart is lined by a single layer of mesothelial cells called the epicardium that provides important cellular contributions for embryonic heart formation. The epicardium harbors a population of progenitor cells that undergo epithelial-to-mesenchymal transition displaying characteristic conversion of planar epithelial cells into multipolar and invasive mesenchymal cells before differentiating into nonmyocyte cardiac lineages, such as vascular smooth muscle cells, pericytes, and fibroblasts. The epicardium is also a source of paracrine cues that are essential for fetal cardiac growth, coronary vessel patterning, and regenerative heart repair. Although the epicardium becomes dormant after birth, cardiac injury reactivates developmental gene programs that stimulate epithelial-to-mesenchymal transition; however, it is not clear how the epicardium contributes to disease progression or repair in the adult. In this review, we will summarize the molecular mechanisms that control epicardium-derived progenitor cell migration, and the functional contributions of the epicardium to heart formation and cardiomyopathy. Future perspectives will be presented to highlight emerging therapeutic strategies aimed at harnessing the regenerative potential of the fetal epicardium for cardiac repair.
Collapse
Affiliation(s)
- Pearl Quijada
- From the Aab Cardiovascular Research Institute (P.Q., E.M.S.), University of Rochester, School of Medicine and Dentistry, Rochester, NY.,Department of Medicine (P.Q., E.M.S.), University of Rochester, School of Medicine and Dentistry, Rochester, NY
| | | | - Eric M Small
- From the Aab Cardiovascular Research Institute (P.Q., E.M.S.), University of Rochester, School of Medicine and Dentistry, Rochester, NY.,Department of Medicine (P.Q., E.M.S.), University of Rochester, School of Medicine and Dentistry, Rochester, NY
| |
Collapse
|
4
|
Burke RM, Quijada P, Misra A, Dirkx RA, Kang B, Moravec CS, Small EM. Abstract 511: Regulation of p53 Protein Levels Drives Activation of Cardiac Fibroblasts in Response to Pressure Overload. Circ Res 2019. [DOI: 10.1161/res.125.suppl_1.511] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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
Heart disease is accompanied by the accumulation of resident cardiac fibroblasts (CF) that subsequently become myofibroblasts and secrete copious amounts of extracellular matrix (ECM), impeding cardiac function and driving the progression of heart failure. Understanding the mechanisms coordinating CF accumulation and myofibroblast activation may reveal novel therapeutic strategies to block pathologic fibrosis. We recently found that
s
mall
pr
oline
r
ich protein 2b (SPRR2B) drives CF proliferation in response to pathological cues by facilitating MDM2-dependent proteasomal degradation of p53. Surprisingly, although Sprr2b gene deletion or targeted mutation of the USP7/MDM2 interacting domain in mice (
Sprr2b-KO
and
Sprr2b-USP
m
, respectively) stimulated the expression of p53-dependent cell cycle arrest genes, mutant animals also developed excessive fibrosis in LV pressure overload. The development of fibrosis in Sprr2b mutant mice was traced primarily to a more robust myofibroblast activation response, providing evidence that CF accumulation and myofibroblast activation may be mutually antagonistic. To investigate the contribution p53 to CF accumulation and fibrosis in mouse heart disease models, we deleted floxed p53 alleles specifically in adult CF using the tamoxifen-inducible
Tcf21
MerCreMer
mouse line (called p53-CKO). Surprisingly, while p53-CKO animals display exaggerated accumulation of Tcf21
+
/PDGFRα
+
CF in response to left ventricle pressure overload, we observed a biphasic physiological response; initially, p53-CKO animals are resistant to systolic functional decline, only developing more severe fibrosis and functional decline than littermate controls at later time points. Time course studies using primary adult mouse CF revealed that p53 positively correlates with myofibroblast activation, while reduction in p53 levels correlates with accelerated cell cycle and the suppression of myofibroblast activation until the subsequent induction of p16/19 - Rb-mediated cell cycle arrest. Taken together, this study offers detailed insight into the transition of CF from a proliferative to an activated state that may accelerate the development of anti-fibrotic strategies.
Collapse
|
5
|
Broughton KM, Khieu T, Nguyen N, Rosa M, Mohsin S, Quijada P, Wang BJ, Echeagaray OH, Kubli DA, Kim T, Firouzi F, Monsanto MM, Gude NA, Adamson RM, Dembitsky WP, Davis ME, Sussman MA. Cardiac interstitial tetraploid cells can escape replicative senescence in rodents but not large mammals. Commun Biol 2019; 2:205. [PMID: 31231694 PMCID: PMC6565746 DOI: 10.1038/s42003-019-0453-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Accepted: 05/02/2019] [Indexed: 12/26/2022] Open
Abstract
Cardiomyocyte ploidy has been described but remains obscure in cardiac interstitial cells. Ploidy of c-kit+ cardiac interstitial cells was assessed using confocal, karyotypic, and flow cytometric technique. Notable differences were found between rodent (rat, mouse) c-kit+ cardiac interstitial cells possessing mononuclear tetraploid (4n) content, compared to large mammals (human, swine) with mononuclear diploid (2n) content. In-situ analysis, confirmed with fresh isolates, revealed diploid content in human c-kit+ cardiac interstitial cells and a mixture of diploid and tetraploid content in mouse. Downregulation of the p53 signaling pathway provides evidence why rodent, but not human, c-kit+ cardiac interstitial cells escape replicative senescence. Single cell transcriptional profiling reveals distinctions between diploid versus tetraploid populations in mouse c-kit+ cardiac interstitial cells, alluding to functional divergences. Collectively, these data reveal notable species-specific biological differences in c-kit+ cardiac interstitial cells, which could account for challenges in extrapolation of myocardial from preclinical studies to clinical trials.
Collapse
Affiliation(s)
- Kathleen M. Broughton
- San Diego State University Heart Institute and the Integrated Regenerative Research Institute, 5500 Campanile Drive, San Diego, CA 92182 USA
| | - Tiffany Khieu
- San Diego State University Heart Institute and the Integrated Regenerative Research Institute, 5500 Campanile Drive, San Diego, CA 92182 USA
| | - Nicky Nguyen
- San Diego State University Heart Institute and the Integrated Regenerative Research Institute, 5500 Campanile Drive, San Diego, CA 92182 USA
| | - Michael Rosa
- San Diego State University Heart Institute and the Integrated Regenerative Research Institute, 5500 Campanile Drive, San Diego, CA 92182 USA
| | - Sadia Mohsin
- Cardiovascular Research Center, Temple University, 3500 N. Broad St., Philadelphia, 19140 PA USA
| | - Pearl Quijada
- San Diego State University Heart Institute and the Integrated Regenerative Research Institute, 5500 Campanile Drive, San Diego, CA 92182 USA
| | - Bingyan J. Wang
- San Diego State University Heart Institute and the Integrated Regenerative Research Institute, 5500 Campanile Drive, San Diego, CA 92182 USA
| | - Oscar H. Echeagaray
- San Diego State University Heart Institute and the Integrated Regenerative Research Institute, 5500 Campanile Drive, San Diego, CA 92182 USA
| | - Dieter A. Kubli
- San Diego State University Heart Institute and the Integrated Regenerative Research Institute, 5500 Campanile Drive, San Diego, CA 92182 USA
| | - Taeyong Kim
- San Diego State University Heart Institute and the Integrated Regenerative Research Institute, 5500 Campanile Drive, San Diego, CA 92182 USA
| | - Fareheh Firouzi
- San Diego State University Heart Institute and the Integrated Regenerative Research Institute, 5500 Campanile Drive, San Diego, CA 92182 USA
| | - Megan M. Monsanto
- San Diego State University Heart Institute and the Integrated Regenerative Research Institute, 5500 Campanile Drive, San Diego, CA 92182 USA
| | - Natalie A. Gude
- San Diego State University Heart Institute and the Integrated Regenerative Research Institute, 5500 Campanile Drive, San Diego, CA 92182 USA
| | - Robert M. Adamson
- Division of Cardiology, Sharp Memorial Hospital, 8010 Frost St., San Diego, 92123 CA USA
| | - Walter P. Dembitsky
- Division of Cardiology, Sharp Memorial Hospital, 8010 Frost St., San Diego, 92123 CA USA
| | - Michael E. Davis
- Biomedical Engineering and Medicine, Emory University, 1760 Haygood Dr., Atlanta, 30322 GA USA
| | - Mark A. Sussman
- San Diego State University Heart Institute and the Integrated Regenerative Research Institute, 5500 Campanile Drive, San Diego, CA 92182 USA
| |
Collapse
|
6
|
Hilt ZT, Pariser DN, Ture SK, Mohan A, Quijada P, Asante AA, Cameron SJ, Sterling JA, Merkel AR, Johanson AL, Jenkins JL, Small EM, McGrath KE, Palis J, Elliott MR, Morrell CN. Platelet-derived β2M regulates monocyte inflammatory responses. JCI Insight 2019; 4:122943. [PMID: 30702442 PMCID: PMC6483513 DOI: 10.1172/jci.insight.122943] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2018] [Accepted: 01/25/2019] [Indexed: 12/13/2022] Open
Abstract
β-2 Microglobulin (β2M) is a molecular chaperone for the major histocompatibility class I (MHC I) complex, hemochromatosis factor protein (HFE), and the neonatal Fc receptor (FcRn), but β2M may also have less understood chaperone-independent functions. Elevated plasma β2M has a direct role in neurocognitive decline and is a risk factor for adverse cardiovascular events. β2M mRNA is present in platelets at very high levels, and β2M is part of the activated platelet releasate. In addition to their more well-studied thrombotic functions, platelets are important immune regulatory cells that release inflammatory molecules and contribute to leukocyte trafficking, activation, and differentiation. We have now found that platelet-derived β2M is a mediator of monocyte proinflammatory differentiation through noncanonical TGFβ receptor signaling. Circulating monocytes from mice lacking β2M only in platelets (Plt-β2M-/-) had a more proreparative monocyte phenotype, in part dependent on increased platelet-derived TGFβ signaling in the absence of β2M. Using a mouse myocardial infarction (MI) model, Plt-β2M-/- mice had limited post-MI proinflammatory monocyte responses and, instead, demonstrated early proreparative monocyte differentiation, profibrotic myofibroblast responses, and a rapid decline in heart function compared with WT mice. These data demonstrate a potentially novel chaperone-independent, monocyte phenotype-regulatory function for platelet β2M and that platelet-derived 2M and TGFβ have opposing roles in monocyte differentiation that may be important in tissue injury responses.
Collapse
Affiliation(s)
| | | | | | - Amy Mohan
- Aab Cardiovascular Research Institute
| | | | - Akua A. Asante
- Center for Pediatric Biomedical Research, Department of Pediatrics, University of Rochester School of Medicine, Rochester, New York, USA
| | | | - Julie A. Sterling
- Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, Tennessee, USA
- Department of Cancer Biology, Medicine, Division of Clinical Pharmacology, Bone Biology Center, and Biomedical Engineering, and
- Department of Cancer Biology, Vanderbilt University, Nashville, Tennessee, USA
| | - Alyssa R. Merkel
- Department of Veterans Affairs, Tennessee Valley Healthcare System, Nashville, Tennessee, USA
- Department of Cancer Biology, Medicine, Division of Clinical Pharmacology, Bone Biology Center, and Biomedical Engineering, and
- Department of Cancer Biology, Vanderbilt University, Nashville, Tennessee, USA
| | | | | | | | - Kathleen E. McGrath
- Center for Pediatric Biomedical Research, Department of Pediatrics, University of Rochester School of Medicine, Rochester, New York, USA
| | - James Palis
- Center for Pediatric Biomedical Research, Department of Pediatrics, University of Rochester School of Medicine, Rochester, New York, USA
| | - Michael R. Elliott
- Department of Microbiology and Immunology, University of Rochester School of Medicine, Rochester, New York, USA
| | - Craig N. Morrell
- Aab Cardiovascular Research Institute
- Department of Microbiology and Immunology, University of Rochester School of Medicine, Rochester, New York, USA
| |
Collapse
|
7
|
Quijada P, Misra A, Velasquez LS, Burke RM, Lighthouse JK, Mickelsen DM, Dirkx RA, Small EM. Pre-existing fibroblasts of epicardial origin are the primary source of pathological fibrosis in cardiac ischemia and aging. J Mol Cell Cardiol 2019; 129:92-104. [PMID: 30771308 DOI: 10.1016/j.yjmcc.2019.01.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/17/2019] [Accepted: 01/17/2019] [Indexed: 01/11/2023]
Abstract
Serum response factor (SRF) and the SRF co-activators myocardin-related transcription factors (MRTFs) are essential for epicardium-derived progenitor cell (EPDC)-mobilization during heart development; however, the impact of developmental EPDC deficiencies on adult cardiac physiology has not been evaluated. Here, we utilize the Wilms Tumor-1 (Wt1)-Cre to delete Mrtfs or Srf in the epicardium, which reduced the number of EPDCs in the adult cardiac interstitium. Deficiencies in Wt1-lineage EPDCs prevented the development of cardiac fibrosis and diastolic dysfunction in aged mice. Mice lacking MRTF or SRF in EPDCs also displayed preservation of cardiac function following myocardial infarction partially due to the depletion of Wt1 lineage-derived cells in the infarct. Interestingly, depletion of Wt1-lineage EPDCs allows for the population of the infarct with a Wt1-negative cell lineage with a reduced fibrotic profile. Taken together, our study conclusively demonstrates the contribution of EPDCs to both ischemic cardiac remodeling and the development of diastolic dysfunction in old age, and reveals the existence of an alternative Wt1-negative source of resident fibroblasts that can populate the infarct.
Collapse
Affiliation(s)
- Pearl Quijada
- Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA
| | - Adwiteeya Misra
- Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA; Department of Biomedical Engineering, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA
| | - Lissette S Velasquez
- Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA
| | - Ryan M Burke
- Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA
| | - Janet K Lighthouse
- Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA
| | - Deanne M Mickelsen
- Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA
| | - Ronald A Dirkx
- Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA
| | - Eric M Small
- Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA; Department of Biomedical Engineering, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA; Department of Pharmacology and Physiology, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA; Department of Medicine, University of Rochester School of Medicine and Dentistry, Rochester, NY 14642, USA.
| |
Collapse
|
8
|
Quijada P, Trembley M, Misra A, Burke R, Lighthouse J, Velasquez L, Mickelsen D, Dirkx R, Kang B, Small E. Epicardium-derived resident mesenchymal cells promote cardiac fibrosis. J Mol Cell Cardiol 2018. [DOI: 10.1016/j.yjmcc.2018.07.061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
|
9
|
Alvarez R, Quijada P, Wang B, Shaitrit M, Ho T, Gude N, Sussman M. Cardiomyocyte Biology Revealed by Fluorescence Ubiquitination-based Cell Cycle Indicators (FUCCI). J Mol Cell Cardiol 2018. [DOI: 10.1016/j.yjmcc.2018.07.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
10
|
Trembley MA, Quijada P, Agullo-Pascual E, Tylock KM, Colpan M, Dirkx RA, Myers JR, Mickelsen DM, de Mesy Bentley K, Rothenberg E, Moravec CS, Alexis JD, Gregorio CC, Dirksen RT, Delmar M, Small EM. Mechanosensitive Gene Regulation by Myocardin-Related Transcription Factors Is Required for Cardiomyocyte Integrity in Load-Induced Ventricular Hypertrophy. Circulation 2018; 138:1864-1878. [PMID: 29716942 PMCID: PMC6202206 DOI: 10.1161/circulationaha.117.031788] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND Hypertrophic cardiomyocyte growth and dysfunction accompany various forms of heart disease. The mechanisms responsible for transcriptional changes that affect cardiac physiology and the transition to heart failure are not well understood. The intercalated disc (ID) is a specialized intercellular junction coupling cardiomyocyte force transmission and propagation of electrical activity. The ID is gaining attention as a mechanosensitive signaling hub and hotspot for causative mutations in cardiomyopathy. METHODS Transmission electron microscopy, confocal microscopy, and single-molecule localization microscopy were used to examine changes in ID structure and protein localization in the murine and human heart. We conducted detailed cardiac functional assessment and transcriptional profiling of mice lacking myocardin-related transcription factor (MRTF)-A and MRTF-B specifically in adult cardiomyocytes to evaluate the role of mechanosensitive regulation of gene expression in load-induced ventricular remodeling. RESULTS We found that MRTFs localize to IDs in the healthy human heart and accumulate in the nucleus in heart failure. Although mice lacking MRTFs in adult cardiomyocytes display normal cardiac physiology at baseline, pressure overload leads to rapid heart failure characterized by sarcomere disarray, ID disintegration, chamber dilation and wall thinning, cardiac functional decline, and partially penetrant acute lethality. Transcriptional profiling reveals a program of actin cytoskeleton and cardiomyocyte adhesion genes driven by MRTFs during pressure overload. Indeed, conspicuous remodeling of gap junctions at IDs identified by single-molecule localization microscopy may partially stem from a reduction in Mapre1 expression, which we show is a direct mechanosensitive MRTF target. CONCLUSIONS Our study describes a novel paradigm in which MRTFs control an acute mechanosensitive signaling circuit that coordinates cross-talk between the actin and microtubule cytoskeleton and maintains ID integrity and cardiomyocyte homeostasis in heart disease.
Collapse
MESH Headings
- Aged
- Animals
- Animals, Newborn
- COS Cells
- Case-Control Studies
- Chlorocebus aethiops
- Connexin 43/genetics
- Connexin 43/metabolism
- Female
- Gene Expression Regulation
- Heart Failure/genetics
- Heart Failure/metabolism
- Heart Failure/pathology
- Heart Failure/physiopathology
- Humans
- Hypertrophy, Left Ventricular/genetics
- Hypertrophy, Left Ventricular/metabolism
- Hypertrophy, Left Ventricular/pathology
- Hypertrophy, Left Ventricular/physiopathology
- Male
- Mechanotransduction, Cellular
- Mice
- Mice, Inbred C57BL
- Mice, Knockout
- Microscopy, Confocal
- Microscopy, Electron, Transmission
- Microtubule-Associated Proteins/genetics
- Microtubule-Associated Proteins/metabolism
- Middle Aged
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/ultrastructure
- NIH 3T3 Cells
- Single Molecule Imaging
- Trans-Activators/deficiency
- Trans-Activators/genetics
- Trans-Activators/metabolism
- Transcription Factors/deficiency
- Transcription Factors/genetics
- Transcription Factors/metabolism
- Ventricular Function, Left
- Ventricular Remodeling
Collapse
Affiliation(s)
- Michael A. Trembley
- Department of Pharmacology and Physiology, University of Rochester, Rochester, NY
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester, Rochester, NY
| | - Pearl Quijada
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester, Rochester, NY
| | - Esperanza Agullo-Pascual
- The Leon H Charney Division of Cardiology, Department of Medicine, New York University School of Medicine, New York, NY
| | - Kevin M. Tylock
- Department of Pharmacology and Physiology, University of Rochester, Rochester, NY
| | - Mert Colpan
- Department of Cellular and Molecular Medicine, Sarver Molecular Cardiovascular Research Program, University of Arizona, Tucson, AZ
| | - Ronald A. Dirkx
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester, Rochester, NY
| | - Jason R. Myers
- Genomics Research Center, University of Rochester, Rochester, NY
| | - Deanne M. Mickelsen
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester, Rochester, NY
| | | | - Eli Rothenberg
- Department of Biochemistry and Molecular Pharmacology, New York University School of Medicine, New York, NY
| | | | - Jeffrey D. Alexis
- Division of Cardiology, Department of Medicine, University of Rochester, Rochester, NY
| | - Carol C. Gregorio
- Department of Cellular and Molecular Medicine, Sarver Molecular Cardiovascular Research Program, University of Arizona, Tucson, AZ
| | - Robert T. Dirksen
- Department of Pharmacology and Physiology, University of Rochester, Rochester, NY
| | - Mario Delmar
- The Leon H Charney Division of Cardiology, Department of Medicine, New York University School of Medicine, New York, NY
| | - Eric M. Small
- Department of Pharmacology and Physiology, University of Rochester, Rochester, NY
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester, Rochester, NY
- Department of Biomedical Engineering, University of Rochester, Rochester, NY
- Author for correspondence: Eric M. Small, Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Box CVRI, Rochester, NY 14642, Phone: (585)276-7706, Fax: (585) 276-9839,
| |
Collapse
|
11
|
Matsumoto C, Jiang Y, Emathinger J, Quijada P, Nguyen N, De La Torre A, Moshref M, Nguyen J, Levinson AB, Shin M, Sussman MA, Hariharan N. Short Telomeres Induce p53 and Autophagy and Modulate Age-Associated Changes in Cardiac Progenitor Cell Fate. Stem Cells 2018; 36:868-880. [PMID: 29441645 DOI: 10.1002/stem.2793] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2017] [Revised: 01/07/2018] [Accepted: 01/24/2018] [Indexed: 12/12/2022]
Abstract
Aging severely limits myocardial repair and regeneration. Delineating the impact of age-associated factors such as short telomeres is critical to enhance the regenerative potential of cardiac progenitor cells (CPCs). We hypothesized that short telomeres activate p53 and induce autophagy to elicit the age-associated change in CPC fate. We isolated CPCs and compared mouse strains with different telomere lengths for phenotypic characteristics of aging. Wild mouse strain Mus musculus castaneus (CAST) possessing short telomeres exhibits early cardiac aging with cardiac dysfunction, hypertrophy, fibrosis, and senescence, as compared with common lab strains FVB and C57 bearing longer telomeres. CAST CPCs with short telomeres demonstrate altered cell fate as characterized by cell cycle arrest, senescence, basal commitment, and loss of quiescence. Elongation of telomeres using a modified mRNA for telomerase restores youthful properties to CAST CPCs. Short telomeres induce autophagy in CPCs, a catabolic protein degradation process, as evidenced by reduced p62 and increased accumulation of autophagic puncta. Pharmacological inhibition of autophagosome formation reverses the cell fate to a more youthful phenotype. Mechanistically, cell fate changes induced by short telomeres are partially p53 dependent, as p53 inhibition rescues senescence and commitment observed in CAST CPCs, coincident with attenuation of autophagy. In conclusion, short telomeres activate p53 and autophagy to tip the equilibrium away from quiescence and proliferation toward differentiation and senescence, leading to exhaustion of CPCs. This study provides the mechanistic basis underlying age-associated cell fate changes that will enable identification of molecular strategies to prevent senescence of CPCs. Stem Cells 2018;36:868-880.
Collapse
Affiliation(s)
- Collin Matsumoto
- Department of Pharmacology, University of California at Davis, Davis, California, USA
| | - Yan Jiang
- Department of Pharmacology, University of California at Davis, Davis, California, USA
| | | | - Pearl Quijada
- Department of Biology, San Diego State University, San Diego, California, USA
| | - Nathalie Nguyen
- Department of Biology, San Diego State University, San Diego, California, USA
| | - Andrea De La Torre
- Department of Biology, San Diego State University, San Diego, California, USA
| | - Maryam Moshref
- Department of Pharmacology, University of California at Davis, Davis, California, USA
| | - Jonathan Nguyen
- Department of Biology, San Diego State University, San Diego, California, USA
| | - Aimee B Levinson
- Department of Pharmacology, University of California at Davis, Davis, California, USA
| | - Minyoung Shin
- Department of Pharmacology, University of California at Davis, Davis, California, USA
| | - Mark A Sussman
- Department of Biology, San Diego State University, San Diego, California, USA
| | - Nirmala Hariharan
- Department of Pharmacology, University of California at Davis, Davis, California, USA.,Department of Biology, San Diego State University, San Diego, California, USA
| |
Collapse
|
12
|
Broughton KM, Wang BJ, Kim T, Mohsin S, Kubli D, Quijada P, Monsanto M, Gude N, Khieu T, Nguyen N, Rosa M, Sussman MA. Abstract 21: Ploidy Alteration of Murine Cardiac Progenitor Cells in Response to Infarction Injury. Circ Res 2017. [DOI: 10.1161/res.121.suppl_1.21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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
Introduction:
Discovery of endogenous cardiac progenitor cells (CPC) prompted intense research efforts in multiple experimental animal models and clinical trials for heart failure treatment. Our lab identified a fundamental difference in ploidy content between rodent (rat, mouse) CPCs possessing mononuclear tetraploid (4n) chromosome content versus large mammal (human, swine) CPCs with mononuclear diploid (2n) content. Ploidy differences raise provocative questions regarding translational applicability of myocardial regeneration in rodents as polyplodization often correlates with enhanced regenerative potential.
Hypothesis:
Mononuclear chromatin duplication in CPCs improves regenerative capacity of the heart through higher stress resistance and overriding senescence cell-cycle arrest.
Methods and Results:
Ploidy of cultured CPCs is consistent and stable ploidy content over increased passages with samples from eight humans, two swine strains, six mouse strains, and seven rat clonal lines as determined by karyotype, confocal microscope and flow cytometry analyses.
In situ
ploidy analysis of CPCs reveals diploid content in human tissue and a mixture of mononuclear diploid and tetraploid nuclei in mouse, confirmed using freshly isolated Lin- c-kit+ CPCs. Tetraploid nuclear phenotype of murine CPCs is markedly different from predominantly diploid (2n) murine c-kit+ cells located in other tissues such as intestine and bone marrow. Higher ploidy content concurrent with expansion of the CPC pool are evident in the border zone at seven days post-infarction in adult FVB mice compared to age and gender matched non-injured hearts.
Conclusion:
Tetraploid c-kit+ cells found within the rodent heart may contribute to species-specific characteristics of stem cells and myocardial regenerative capacity. Future studies will focus upon the biological properties of diploid versus tetraploid CPCs and advantages of polyploid content for mediating myocardial regeneration.
Collapse
|
13
|
Hariharan N, Matsumoto C, Emathinger J, Daneshpooy S, Shin M, Levinson AB, Quijada P, Nguyen N, Sussman M. Abstract 340: Short Telomeres Induce Autophagy and Modulate Cardiac Progenitor Cell Fate. Circ Res 2017. [DOI: 10.1161/res.121.suppl_1.340] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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
Aging severely limits myocardial regeneration. Delineating the impact of age-associated factors such as short telomeres is critical to enhance the regenerative potential of cardiac progenitor cells (CPCs). We hypothesize that short telomeres induce autophagy and elicit the age-associated change in cardiac progenitor cell fate. We compared mouse strains with different telomere lengths (TL) for phenotypic characteristics of aging and also isolated CPCs from them. Naturally occurring wild mouse strain
Mus musculus castaneus
(CAST) possessing short telomeres (TL:18Kb) exhibits early cardiac aging with diastolic dysfunction, hypertrophy, fibrosis and increase in senescence markers p53 and p16, as compared to common lab strains FVB (TL:75Kb) and C57 (TL:50Kb). CAST CPCs with short TLs have altered cell fate as characterized by slower proliferation (p<0.01); increased senescence identified by beta-galactosidase activity (p<0.05); increased basal commitment as determined by expression of lineage markers smooth muscle actin, Tie2, and sarcomeric actinin (16.6, 1.7 and 1.75, p<0.05); as well as loss of quiescence marker expression. Consistent findings of altered cell fate are also evident in old CPCs isolated from aged mice with significantly shorter TLs. Cell fate changes occurring downstream from short TL are at least partially p53 dependent, as p53 inhibition rescues the irreversible cell cycle arrest observed in CAST CPCs. Mechanistically, short TLs induce autophagy, a catabolic protein degradation process. Autophagy flux is increased in CAST CPCs as evidenced by increased LC3 (p<0.05), reduced p62 expression (-52%, p<0.05) and increased accumulation of autophagic puncta. Pharmacological inhibition of autophagosome formation, but not autolysosome formation reverses the cell fate to a more youthful phenotype. Overall the data suggests that short TLs activate autophagy to accommodate cell fate changes that tip the equilibrium away from quiescence and proliferation into differentiation and senescence, leading to age-associated exhaustion of CPCs. The study provides the mechanistic basis underlying age-associated cell fate changes that will enable identification of molecular strategies to enhance the therapeutic effects of aged CPCs.
Collapse
|
14
|
Liu N, Wang BJ, Broughton KM, Alvarez R, Siddiqi S, Loaiza R, Nguyen N, Quijada P, Gude N, Sussman MA. PIM1-minicircle as a therapeutic treatment for myocardial infarction. PLoS One 2017; 12:e0173963. [PMID: 28323876 PMCID: PMC5360264 DOI: 10.1371/journal.pone.0173963] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [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: 11/22/2016] [Accepted: 03/01/2017] [Indexed: 01/13/2023] Open
Abstract
PIM1, a pro-survival gene encoding a serine/ threonine kinase, influences cell proliferation and survival. Modification of cardiac progenitor cells (CPCs) or cardiomyocytes with PIM1 using a lentivirus-based delivery method showed long-term improved cardiac function after myocardial infarction (MI). However, lentivirus based delivery methods have stringent FDA regulation with respect to clinical trials. To provide an alternative and low risk PIM1 delivery method, this study examined the use of a non-viral modified plasmid-minicircle (MC) as a vehicle to deliver PIM1 into mouse CPCs (mCPCs) in vitro and the myocardium in vivo. MC containing a turbo gfp reporter gene (gfp-MC) was used as a transfection and injection control. PIM1 was subcloned into gfp-MC (PIM1-MC) and then transfected into mCPCs at an efficiency of 29.4±3.7%. PIM1-MC engineered mCPCs (PIM1-mCPCs) exhibit significantly (P<0.05) better survival rate under oxidative treatment. PIM1-mCPCs also exhibit 1.9±0.1 and 2.2±0.2 fold higher cell proliferation at 3 and 5 days post plating, respectively, as compared to gfp-MC transfected mCPCs control. PIM1-MC was injected directly into ten-week old adult FVB female mice hearts in the border zone immediately after MI. Delivery of PIM1 into myocardium was confirmed by GFP+ cardiomyocytes. Mice with PIM1-MC injection showed increased protection compared to gfp-MC injection groups measured by ejection fraction at 3 and 7 days post injury (P = 0.0379 and P = 0.0262 by t-test, respectively). Success of PIM1 delivery and integration into mCPCs in vitro and cardiomyocytes in vivo by MC highlights the possibility of a non-cell based therapeutic approach for treatment of ischemic heart disease and MI.
Collapse
Affiliation(s)
- Nan Liu
- Biology Department, San Diego State University, San Diego, California, United States of America
| | - Bingyan J. Wang
- Biology Department, San Diego State University, San Diego, California, United States of America
| | - Kathleen M. Broughton
- Biology Department, San Diego State University, San Diego, California, United States of America
| | - Roberto Alvarez
- Biology Department, San Diego State University, San Diego, California, United States of America
| | - Sailay Siddiqi
- Biology Department, San Diego State University, San Diego, California, United States of America
| | - Rebeca Loaiza
- Biology Department, San Diego State University, San Diego, California, United States of America
| | - Nicky Nguyen
- Biology Department, San Diego State University, San Diego, California, United States of America
| | - Pearl Quijada
- Biology Department, San Diego State University, San Diego, California, United States of America
| | - Natalie Gude
- Biology Department, San Diego State University, San Diego, California, United States of America
| | - Mark A. Sussman
- Biology Department, San Diego State University, San Diego, California, United States of America
- * E-mail:
| |
Collapse
|
15
|
Doroudgar S, Quijada P, Konstandin M, Ilves K, Broughton K, Khalafalla FG, Casillas A, Nguyen K, Gude N, Toko H, Ornelas L, Thuerauf DJ, Glembotski CC, Sussman MA, Völkers M. S100A4 protects the myocardium against ischemic stress. J Mol Cell Cardiol 2016; 100:54-63. [PMID: 27721024 DOI: 10.1016/j.yjmcc.2016.10.001] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Revised: 09/13/2016] [Accepted: 10/04/2016] [Indexed: 11/30/2022]
Abstract
BACKGROUND Myocardial infarction is followed by cardiac dysfunction, cellular death, and ventricular remodeling, including tissue fibrosis. S100A4 protein plays multiple roles in cellular survival, and tissue fibrosis, but the relative role of the S100A4 in the myocardium after myocardial infarction is unknown. This study aims to investigate the role of S100A4 in myocardial remodeling and cardiac function following infarct damage. METHODS AND RESULTS S100A4 expression is low in the adult myocardium, but significantly increased following myocardial infarction. Deletion of S100A4 increased cardiac damage after myocardial infarction, whereas cardiac myocyte-specific overexpression of S100A4 protected the infarcted myocardium. Decreased cardiac function in S100A4 Knockout mice was accompanied with increased cardiac remodeling, fibrosis, and diminished capillary density in the remote myocardium. Loss of S100A4 caused increased apoptotic cell death both in vitro and in vivo in part mediated by decreased VEGF expression. Conversely, S100A4 overexpression protected cells against apoptosis in vitro and in vivo. Increased pro-survival AKT-signaling explained reduced apoptosis in S100A4 overexpressing cells. CONCLUSION S100A4 expression protects cardiac myocytes against myocardial ischemia and is required for stabilization of cardiac function after MI.
Collapse
Affiliation(s)
- Shirin Doroudgar
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA; University Hospital Heidelberg, Internal Medicine III, Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany
| | - Pearl Quijada
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA
| | - Mathias Konstandin
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA; University Hospital Heidelberg, Internal Medicine III, Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany
| | - Kelli Ilves
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA
| | - Kathleen Broughton
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA
| | - Farid G Khalafalla
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA
| | - Alexandria Casillas
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA
| | - Kristine Nguyen
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA
| | - Natalie Gude
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA
| | - Haruhiro Toko
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA
| | - Luis Ornelas
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA
| | - Donna J Thuerauf
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA
| | - Christopher C Glembotski
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA
| | - Mark A Sussman
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA
| | - Mirko Völkers
- The San Diego State Heart Institute and Department of Biology, San Diego State University, San Diego, CA 92182, USA; University Hospital Heidelberg, Internal Medicine III, Heidelberg, Germany; DZHK (German Centre for Cardiovascular Research), partner site Heidelberg/Mannheim, Germany.
| |
Collapse
|
16
|
Broughton K, Khieu T, Nguyen N, Mohsin S, Quijada P, Wang J, Monsanto M, Gude N, Sussman M. Abstract 350: Chromosome Content of Cardiac Progenitor Cells Influence on Regenerative Potential in the Heart. Circ Res 2016. [DOI: 10.1161/res.119.suppl_1.350] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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
Discovery of endogenous stem cells found within the heart, cardiac progenitor cells (CPC), has prompted intense basic discovery in multiple experimental animal models and clinical trials in heart failure patients. A survey of the literature reveals animal or cellular models exhibiting regenerative properties are also characterized by genome duplication or polyploidization. Our lab recently discovered a fundamental difference between large and small mammalian CPCs through karyotype analysis: rodent (rat, mouse) CPCs possess mononuclear tetraploid (4n) chromosome content, whereas large animal (human, swine) CPCs are mononuclear diploid (2n). This primary distinction between large and small animals prompts provocative questions regarding regenerative potential as well as the translational applicability of regenerative studies performed in rodent models. To expand on this finding, CPCs were isolated from eight human tissue samples (normal and heart failure), two swine strains (Gottingen and Yorkshire) six mice strains (FVB, C57, CAST, SPRET, SAMP6, and SAMR1), and seven rat clonal lines (Sprague Dawley), which confirmed karyotyped ploidy content per species as characterized through flow cytometry and confocal microscopy techniques. The large (human, swine) and small (rat, mouse) mammal CPCs maintained stable chromosome content through increased passaging and positive correlations appears between chromosome content and growth rate through increased passages as well as chromosome content and unrestrained growth through increased passages. The ploidy content of endogenous CPCs was investigated
in situ
with heart tissue sections with comparable ploidy determinations to that of cultured CPCs. Furthermore, the unique tetraploid content of murine CPCs is reinforced by comparison with ckit+ progenitor cells of secondary tissues (intestine and bone marrow) and cardiomyocytes
in situ
and
in vitro
that exhibit mostly diploid (2n) chromosome content per nuclei. These studies suggest ploidy may play a significant role in the biological capacity of the CPC and the endogenous stem cell pool may influence the regenerative capacity of the heart. Future directions will focus on defining the advantage of polyploid content in mediating regeneration.
Collapse
|
17
|
Wade F, Quijada P, Al-Haffar KMA, Awad SM, Kunhi M, Toko H, Marashly Q, Belhaj K, Zahid I, Al-Mohanna F, Stanford SM, Alvarez R, Liu Y, Colak D, Jordan MC, Roos KP, Assiri A, Al-Habeeb W, Sussman M, Bottini N, Poizat C. Deletion of low molecular weight protein tyrosine phosphatase (Acp1) protects against stress-induced cardiomyopathy. J Pathol 2015. [PMID: 26213100 PMCID: PMC5049627 DOI: 10.1002/path.4594] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The low molecular weight protein tyrosine phosphatase (LMPTP), encoded by the ACP1 gene, is a ubiquitously expressed phosphatase whose in vivo function in the heart and in cardiac diseases remains unknown. To investigate the in vivo role of LMPTP in cardiac function, we generated mice with genetic inactivation of the Acp1 locus and studied their response to long‐term pressure overload. Acp1−/− mice develop normally and ageing mice do not show pathology in major tissues under basal conditions. However, Acp1−/− mice are strikingly resistant to pressure overload hypertrophy and heart failure. Lmptp expression is high in the embryonic mouse heart, decreased in the postnatal stage, and increased in the adult mouse failing heart. We also show that LMPTP expression increases in end‐stage heart failure in humans. Consistent with their protected phenotype, Acp1−/− mice subjected to pressure overload hypertrophy have attenuated fibrosis and decreased expression of fibrotic genes. Transcriptional profiling and analysis of molecular signalling show that the resistance of Acp1−/− mice to pathological cardiac stress correlates with marginal re‐expression of fetal cardiac genes, increased insulin receptor beta phosphorylation, as well as PKA and ephrin receptor expression, and inactivation of the CaMKIIδ pathway. Our data show that ablation of Lmptp inhibits pathological cardiac remodelling and suggest that inhibition of LMPTP may be of therapeutic relevance for the treatment of human heart failure. © 2015 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of Pathological Society of Great Britain and Ireland.
Collapse
Affiliation(s)
- Fallou Wade
- Cardiovascular Research Program, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Pearl Quijada
- San Diego State University, Department of Biology, 5500 Campanile Drive, San Diego, CA, USA
| | | | - Salma Mahmoud Awad
- Cardiovascular Research Program, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Muhammad Kunhi
- Cardiovascular Research Program, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Haruhiro Toko
- San Diego State University, Department of Biology, 5500 Campanile Drive, San Diego, CA, USA
| | - Qussay Marashly
- College of Medicine and Health Sciences, Al-Faisal University, Riyadh, Saudi Arabia
| | - Karim Belhaj
- College of Medicine and Health Sciences, Al-Faisal University, Riyadh, Saudi Arabia
| | - Israa Zahid
- Cardiovascular Research Program, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Falah Al-Mohanna
- Department of Comparative Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | - Stephanie M Stanford
- Division of Cellular Biology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA, USA
| | - Roberto Alvarez
- San Diego State University, Department of Biology, 5500 Campanile Drive, San Diego, CA, USA
| | - Yingge Liu
- USC Institute for Genetic Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
| | - Dilek Colak
- Department of Biostatistics and Scientific Computing, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia
| | - Maria C Jordan
- Department of Physiology, David Geffen School of Medicine at UCLA, 10833 LeConte Avenue, Los Angeles, CA, USA
| | - Kenneth P Roos
- Department of Physiology, David Geffen School of Medicine at UCLA, 10833 LeConte Avenue, Los Angeles, CA, USA
| | - Abdullah Assiri
- Department of Comparative Medicine, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia
| | | | - Mark Sussman
- San Diego State University, Department of Biology, 5500 Campanile Drive, San Diego, CA, USA
| | - Nunzio Bottini
- Division of Cellular Biology, La Jolla Institute for Allergy and Immunology, 9420 Athena Circle, La Jolla, CA, USA.,USC Institute for Genetic Medicine, Keck School of Medicine of the University of Southern California, Los Angeles, CA, USA
| | - Coralie Poizat
- Cardiovascular Research Program, King Faisal Specialist Hospital and Research Centre, Riyadh, Saudi Arabia.,San Diego State University, Department of Biology, 5500 Campanile Drive, San Diego, CA, USA
| |
Collapse
|
18
|
Quijada P, Hariharan N, Cubillo JD, Bala KM, Emathinger JM, Wang BJ, Ormachea L, Bers DM, Sussman MA, Poizat C. Nuclear Calcium/Calmodulin-dependent Protein Kinase II Signaling Enhances Cardiac Progenitor Cell Survival and Cardiac Lineage Commitment. J Biol Chem 2015; 290:25411-26. [PMID: 26324717 DOI: 10.1074/jbc.m115.657775] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Indexed: 12/13/2022] Open
Abstract
Ca(2+)/Calmodulin-dependent protein kinase II (CaMKII) signaling in the heart regulates cardiomyocyte contractility and growth in response to elevated intracellular Ca(2+). The δB isoform of CaMKII is the predominant nuclear splice variant in the adult heart and regulates cardiomyocyte hypertrophic gene expression by signaling to the histone deacetylase HDAC4. However, the role of CaMKIIδ in cardiac progenitor cells (CPCs) has not been previously explored. During post-natal growth endogenous CPCs display primarily cytosolic CaMKIIδ, which localizes to the nuclear compartment of CPCs after myocardial infarction injury. CPCs undergoing early differentiation in vitro increase levels of CaMKIIδB in the nuclear compartment where the kinase may contribute to the regulation of CPC commitment. CPCs modified with lentiviral-based constructs to overexpress CaMKIIδB (CPCeδB) have reduced proliferative rate compared with CPCs expressing eGFP alone (CPCe). Additionally, stable expression of CaMKIIδB promotes distinct morphological changes such as increased cell surface area and length of cells compared with CPCe. CPCeδB are resistant to oxidative stress induced by hydrogen peroxide (H2O2) relative to CPCe, whereas knockdown of CaMKIIδB resulted in an up-regulation of cell death and cellular senescence markers compared with scrambled treated controls. Dexamethasone (Dex) treatment increased mRNA and protein expression of cardiomyogenic markers cardiac troponin T and α-smooth muscle actin in CPCeδB compared with CPCe, suggesting increased differentiation. Therefore, CaMKIIδB may serve as a novel modulatory protein to enhance CPC survival and commitment into the cardiac and smooth muscle lineages.
Collapse
Affiliation(s)
- Pearl Quijada
- From the Department of Biology, San Diego State University, San Diego, California 92182
| | - Nirmala Hariharan
- Department of Pharmacology, University of California at Davis, Davis, California 95616, and
| | - Jonathan D Cubillo
- From the Department of Biology, San Diego State University, San Diego, California 92182
| | - Kristin M Bala
- From the Department of Biology, San Diego State University, San Diego, California 92182
| | | | - Bingyan J Wang
- From the Department of Biology, San Diego State University, San Diego, California 92182
| | - Lucia Ormachea
- From the Department of Biology, San Diego State University, San Diego, California 92182
| | - Donald M Bers
- Department of Pharmacology, University of California at Davis, Davis, California 95616, and
| | - Mark A Sussman
- From the Department of Biology, San Diego State University, San Diego, California 92182
| | - Coralie Poizat
- From the Department of Biology, San Diego State University, San Diego, California 92182, Cardiovascular Research Program, King Faisal Specialist Hospital and Research Centre, Riyadh 11211, Kingdom of Saudi Arabia
| |
Collapse
|
19
|
Abstract
Despite the increasing use of stem cells for regenerative-based cardiac therapy, the optimal stem cell population(s) remains in a cloud of uncertainty. In the past decade, the field has witnessed a surge of researchers discovering stem cell populations reported to directly and/or indirectly contribute to cardiac regeneration through processes of cardiomyogenic commitment and/or release of cardioprotective paracrine factors. This review centers upon defining basic biological characteristics of stem cells used for sustaining cardiac integrity during disease and maintenance of communication between the cardiac environment and stem cells. Given the limited successes achieved so far in regenerative therapy, the future requires development of unprecedented concepts involving combinatorial approaches to create and deliver the optimal stem cell(s) that will enhance myocardial healing.
Collapse
Affiliation(s)
- Pearl Quijada
- Integrated Regenerative Research Institute, Department of Biology, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA
| | | |
Collapse
|
20
|
Quijada P, Salunga HT, Hariharan N, Cubillo JD, El-Sayed FG, Moshref M, Bala KM, Emathinger JM, De La Torre A, Ormachea L, Alvarez R, Gude NA, Sussman MA. Cardiac Stem Cell Hybrids Enhance Myocardial Repair. Circ Res 2015; 117:695-706. [PMID: 26228030 DOI: 10.1161/circresaha.115.306838] [Citation(s) in RCA: 70] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2015] [Accepted: 07/29/2015] [Indexed: 02/07/2023]
Abstract
RATIONALE Dual cell transplantation of cardiac progenitor cells (CPCs) and mesenchymal stem cells (MSCs) after infarction improves myocardial repair and performance in large animal models relative to delivery of either cell population. OBJECTIVE To demonstrate that CardioChimeras (CCs) formed by fusion between CPCs and MSCs have enhanced reparative potential in a mouse model of myocardial infarction relative to individual stem cells or combined cell delivery. METHODS AND RESULTS Two distinct and clonally derived CCs, CC1 and CC2, were used for this study. CCs improved left ventricular anterior wall thickness at 4 weeks post injury, but only CC1 treatment preserved anterior wall thickness at 18 weeks. Ejection fraction was enhanced at 6 weeks in CCs, and functional improvements were maintained in CCs and CPC+MSC groups at 18 weeks. Infarct size was decreased in CCs, whereas CPC+MSC and CPC parent groups remained unchanged at 12 weeks. CCs exhibited increased persistence, engraftment, and expression of early commitment markers within the border zone relative to combinatorial and individual cell population-injected groups. CCs increased capillary density and preserved cardiomyocyte size in the infarcted regions suggesting CCs role in protective paracrine secretion. CONCLUSIONS CCs merge the application of distinct cells into a single entity for cellular therapeutic intervention in the progression of heart failure. CCs are a novel cell therapy that improves on combinatorial cell approaches to support myocardial regeneration.
Collapse
Affiliation(s)
- Pearl Quijada
- From the Integrated Regenerative Research Institute, Department of Biology, San Diego State University, CA (P.Q., H.T.S., J.D.C., F.G.E.-S., M.M., K.M.B., J.M.E., A.D.L.T., L.O., R.A., N.A.G., M.A.S.); and Department of Pharmacology, University of California at Davis (N.H.)
| | - Hazel T Salunga
- From the Integrated Regenerative Research Institute, Department of Biology, San Diego State University, CA (P.Q., H.T.S., J.D.C., F.G.E.-S., M.M., K.M.B., J.M.E., A.D.L.T., L.O., R.A., N.A.G., M.A.S.); and Department of Pharmacology, University of California at Davis (N.H.)
| | - Nirmala Hariharan
- From the Integrated Regenerative Research Institute, Department of Biology, San Diego State University, CA (P.Q., H.T.S., J.D.C., F.G.E.-S., M.M., K.M.B., J.M.E., A.D.L.T., L.O., R.A., N.A.G., M.A.S.); and Department of Pharmacology, University of California at Davis (N.H.)
| | - Jonathan D Cubillo
- From the Integrated Regenerative Research Institute, Department of Biology, San Diego State University, CA (P.Q., H.T.S., J.D.C., F.G.E.-S., M.M., K.M.B., J.M.E., A.D.L.T., L.O., R.A., N.A.G., M.A.S.); and Department of Pharmacology, University of California at Davis (N.H.)
| | - Farid G El-Sayed
- From the Integrated Regenerative Research Institute, Department of Biology, San Diego State University, CA (P.Q., H.T.S., J.D.C., F.G.E.-S., M.M., K.M.B., J.M.E., A.D.L.T., L.O., R.A., N.A.G., M.A.S.); and Department of Pharmacology, University of California at Davis (N.H.)
| | - Maryam Moshref
- From the Integrated Regenerative Research Institute, Department of Biology, San Diego State University, CA (P.Q., H.T.S., J.D.C., F.G.E.-S., M.M., K.M.B., J.M.E., A.D.L.T., L.O., R.A., N.A.G., M.A.S.); and Department of Pharmacology, University of California at Davis (N.H.)
| | - Kristin M Bala
- From the Integrated Regenerative Research Institute, Department of Biology, San Diego State University, CA (P.Q., H.T.S., J.D.C., F.G.E.-S., M.M., K.M.B., J.M.E., A.D.L.T., L.O., R.A., N.A.G., M.A.S.); and Department of Pharmacology, University of California at Davis (N.H.)
| | - Jacqueline M Emathinger
- From the Integrated Regenerative Research Institute, Department of Biology, San Diego State University, CA (P.Q., H.T.S., J.D.C., F.G.E.-S., M.M., K.M.B., J.M.E., A.D.L.T., L.O., R.A., N.A.G., M.A.S.); and Department of Pharmacology, University of California at Davis (N.H.)
| | - Andrea De La Torre
- From the Integrated Regenerative Research Institute, Department of Biology, San Diego State University, CA (P.Q., H.T.S., J.D.C., F.G.E.-S., M.M., K.M.B., J.M.E., A.D.L.T., L.O., R.A., N.A.G., M.A.S.); and Department of Pharmacology, University of California at Davis (N.H.)
| | - Lucia Ormachea
- From the Integrated Regenerative Research Institute, Department of Biology, San Diego State University, CA (P.Q., H.T.S., J.D.C., F.G.E.-S., M.M., K.M.B., J.M.E., A.D.L.T., L.O., R.A., N.A.G., M.A.S.); and Department of Pharmacology, University of California at Davis (N.H.)
| | - Roberto Alvarez
- From the Integrated Regenerative Research Institute, Department of Biology, San Diego State University, CA (P.Q., H.T.S., J.D.C., F.G.E.-S., M.M., K.M.B., J.M.E., A.D.L.T., L.O., R.A., N.A.G., M.A.S.); and Department of Pharmacology, University of California at Davis (N.H.)
| | - Natalie A Gude
- From the Integrated Regenerative Research Institute, Department of Biology, San Diego State University, CA (P.Q., H.T.S., J.D.C., F.G.E.-S., M.M., K.M.B., J.M.E., A.D.L.T., L.O., R.A., N.A.G., M.A.S.); and Department of Pharmacology, University of California at Davis (N.H.)
| | - Mark A Sussman
- From the Integrated Regenerative Research Institute, Department of Biology, San Diego State University, CA (P.Q., H.T.S., J.D.C., F.G.E.-S., M.M., K.M.B., J.M.E., A.D.L.T., L.O., R.A., N.A.G., M.A.S.); and Department of Pharmacology, University of California at Davis (N.H.).
| |
Collapse
|
21
|
Quijada P, Salunga HT, Hariharan N, Cubillo J, El-Sayed F, Moshref M, Bala KM, Emathinger JM, De La Torre A, Ormachea L, Alvarez R, Gude NA, Sussman MA. Abstract 16: Enhancing Myocardial Repair With CardioChimeras. Circ Res 2015. [DOI: 10.1161/res.117.suppl_1.16] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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
Dual cell transplantation of cardiac progenitor cells (CPCs) and mesenchymal stem cells (MSCs) after infarction enhances myocardial repair and performance in large animal models relative to delivery of either cell population individually. However, a single stem cell to support both direct and indirect mechanisms of myocardial repair has yet to be identified. CardioChimeras (CCs), a progenitor cell formed by fusion between CPCs and MSCs were analysed for reparative potential after myocardial infarction (MI) relative to individual parents cell or combined parent cell delivery. Two representative CCs, CardioChimera 1 (CC1) and CardioChimera 2 (CC2) were used for this study. CC1 and CC2 improved left ventricular anterior wall thickness (AWT) at 4 weeks, but only CC1 treatment preserved AWT at 18 weeks relative to no cell treatment (PBS). Ejection fraction was enhanced at 6 weeks post injury in CC1 and CC2 groups, which was maintained in CC1, CC2 and CPC + MSC combined groups up to 18 weeks. Infarct size was decreased by 5% in CC1 and CC2 hearts, whereas CPC + MSC and CPC parent groups remained unchanged when comparing 4 to 12 week change in scar size. MSC and PBS groups displayed marked increases in infarct size (10-15%). CC1 and CC2 showed enhanced engraftment potential by 3-fold relative to CPC + MSC and CPC hearts. In contrast, MSCs were detected at low levels (0.04%). CC1 and CC2 discovered within the myocardium expressed early commitment marker cardiac troponin T relative to controls. CC1 and CC2 treatment increased capillary density within the infarct, indicating that cell persistence facilitates paracrine mediated vasculature stabilization and/or formation. CCs merge the application of distinct cells into a single entity for cellular therapeutic intervention in the progression of heart failure. CCs represent a tractable cellular system that improves upon combinatorial cell therapy approaches and supports myocardial regeneration.
Collapse
|
22
|
Quijada P, Hariharan N, Cubillo J, Bala KM, Ormachea L, Bers DM, Sussman MA, Poizat C. Abstract 17: Nuclear Calcium/Calmodulin-dependent Protein Kinase II Signaling Enhances Cardiac Progenitor Cell Survival and Cardiac Lineage Commitment. Circ Res 2015. [DOI: 10.1161/res.117.suppl_1.17] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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
Ca2+/Calmodulin-dependent protein kinase II (CaMKII) signaling in the heart regulates cardiomyocyte contractility and growth in response to elevated intracellular Ca2+. The δB isoform of CaMKII is the predominant nuclear splice variant in the adult heart and regulates cardiomyocyte hypertrophic gene expression by signaling to the histone deacetylase HDAC4. However, the role of CaMKIIδ in cardiac progenitor cells (CPCs) has not been explored. During developmental growth endogenous CPCs display primarily cytosolic CaMKIIδ, which localizes to the nuclear compartment of CPCs after myocardial infarction injury. CPCs undergoing early differentiation in vitro increase levels of CaMKIIδB in the nuclear compartment where the kinase may contribute to the regulation of CPC commitment. CPCs modified with an established lentiviral based constructs to overexpress CaMKIIδB (CPCeδB) have reduced proliferative rate compared to lentiviral transduction of CPCs with eGFP alone (CPCe). Additionally, stable expression of CaMKIIδB promotes distinct morphological changes such as increased cell surface area and increased length of cells compared to CPCe. CPCeδB are resistant to oxidative stress induced by H2O2 relative to CPCe, whereas a knockdown of CaMKIIδB using small hairpin RNA resulted in an up regulation of cell death compared to scrambled treated controls. Dexamethasone treatment to promote cardiac differentiation increased cardiomyogenic markers cardiac troponin T and α-smooth muscle actin measured by RT-PCR and immunoblot analyses in CPCeδB compared to control CPCe. Therefore, CaMKIIδB may serve as a novel modulatory protein to enhance CPC survival and commitment into the cardiac and smooth muscle lineage.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | - Coralie Poizat
- King Faisal Specialist Hosp and Rsch Cntr, Riyadh, Saudi Arabia
| |
Collapse
|
23
|
Gude N, Joyo E, Toko H, Quijada P, Villanueva M, Hariharan N, Sacchi V, Truffa S, Joyo A, Voelkers M, Alvarez R, Sussman MA. Notch activation enhances lineage commitment and protective signaling in cardiac progenitor cells. Basic Res Cardiol 2015; 110:29. [PMID: 25893875 DOI: 10.1007/s00395-015-0488-3] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/29/2014] [Revised: 03/04/2015] [Accepted: 04/14/2015] [Indexed: 12/12/2022]
Abstract
Phase I clinical trials applying autologous progenitor cells to treat heart failure have yielded promising results; however, improvement in function is modest, indicating a need to enhance cardiac stem cell reparative capacity. Notch signaling plays a crucial role in cardiac development, guiding cell fate decisions that underlie myocyte and vessel differentiation. The Notch pathway is retained in the adult cardiac stem cell niche, where level and duration of Notch signal influence proliferation and differentiation of cardiac progenitors. In this study, Notch signaling promotes growth, survival and differentiation of cardiac progenitor cells into smooth muscle lineages in vitro. Cardiac progenitor cells expressing tamoxifen-regulated intracellular Notch1 (CPCeK) are significantly larger and proliferate more slowly than control cells, exhibit elevated mTORC1 and Akt signaling, and are resistant to oxidative stress. Vascular smooth muscle and cardiomyocyte markers increase in CPCeK and are augmented further upon ligand-mediated induction of Notch signal. Paracrine signals indicative of growth, survival and differentiation increase with Notch activity, while markers of senescence are decreased. Adoptive transfer of CPCeK into infarcted mouse myocardium enhances preservation of cardiac function and reduces infarct size relative to hearts receiving control cells. Greater capillary density and proportion of vascular smooth muscle tissue in CPCeK-treated hearts indicate improved vascularization. Finally, we report a previously undescribed signaling mechanism whereby Notch activation stimulates CPC growth, survival and differentiation via mTORC1 and paracrine factor expression. Taken together, these findings suggest that regulated Notch activation potentiates the reparative capacity of CPCs in the treatment of cardiac disease.
Collapse
Affiliation(s)
- Natalie Gude
- Heart Institute, and Biology Department, SDSU Integrated Regenerative Research Institute, Life Sciences North, Room 426, 5500 Campanile Drive, San Diego, CA, 92182, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
24
|
Samse K, Emathinger J, Hariharan N, Quijada P, Ilves K, Völkers M, Ormachea L, De La Torre A, Orogo AM, Alvarez R, Din S, Mohsin S, Monsanto M, Fischer KM, Dembitsky WP, Gustafsson ÅB, Sussman MA. Functional Effect of Pim1 Depends upon Intracellular Localization in Human Cardiac Progenitor Cells. J Biol Chem 2015; 290:13935-47. [PMID: 25882843 DOI: 10.1074/jbc.m114.617431] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Indexed: 01/07/2023] Open
Abstract
Human cardiac progenitor cells (hCPC) improve heart function after autologous transfer in heart failure patients. Regenerative potential of hCPCs is severely limited with age, requiring genetic modification to enhance therapeutic potential. A legacy of work from our laboratory with Pim1 kinase reveals effects on proliferation, survival, metabolism, and rejuvenation of hCPCs in vitro and in vivo. We demonstrate that subcellular targeting of Pim1 bolsters the distinct cardioprotective effects of this kinase in hCPCs to increase proliferation and survival, and antagonize cellular senescence. Adult hCPCs isolated from patients undergoing left ventricular assist device implantation were engineered to overexpress Pim1 throughout the cell (PimWT) or targeted to either mitochondrial (Mito-Pim1) or nuclear (Nuc-Pim1) compartments. Nuc-Pim1 enhances stem cell youthfulness associated with decreased senescence-associated β-galactosidase activity, preserved telomere length, reduced expression of p16 and p53, and up-regulation of nucleostemin relative to PimWT hCPCs. Alternately, Mito-Pim1 enhances survival by increasing expression of Bcl-2 and Bcl-XL and decreasing cell death after H2O2 treatment, thereby preserving mitochondrial integrity superior to PimWT. Mito-Pim1 increases the proliferation rate by up-regulation of cell cycle modulators Cyclin D, CDK4, and phospho-Rb. Optimal stem cell traits such as proliferation, survival, and increased youthful properties of aged hCPCs are enhanced after targeted Pim1 localization to mitochondrial or nuclear compartments. Targeted Pim1 overexpression in hCPCs allows for selection of the desired phenotypic properties to overcome patient variability and improve specific stem cell characteristics.
Collapse
Affiliation(s)
- Kaitlen Samse
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Jacqueline Emathinger
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Nirmala Hariharan
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Pearl Quijada
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Kelli Ilves
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Mirko Völkers
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Lucia Ormachea
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Andrea De La Torre
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Amabel M Orogo
- the Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, California 92093, and
| | - Roberto Alvarez
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Shabana Din
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Sadia Mohsin
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Megan Monsanto
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | - Kimberlee M Fischer
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182
| | | | - Åsa B Gustafsson
- the Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California, San Diego, La Jolla, California 92093, and
| | - Mark A Sussman
- From the San Diego Heart Research Institute, San Diego State University, San Diego, California 92182,
| |
Collapse
|
25
|
Affiliation(s)
- Pearl Quijada
- From the Department of Biology, The Integrated Regenerative Research Institute, San Diego State University, CA
| | - Mark A Sussman
- From the Department of Biology, The Integrated Regenerative Research Institute, San Diego State University, CA.
| |
Collapse
|
26
|
Hariharan N, Quijada P, Mohsin S, Joyo A, Samse K, Monsanto M, De La Torre A, Avitabile D, Ormachea L, McGregor MJ, Tsai EJ, Sussman MA. Nucleostemin rejuvenates cardiac progenitor cells and antagonizes myocardial aging. J Am Coll Cardiol 2015; 65:133-47. [PMID: 25593054 DOI: 10.1016/j.jacc.2014.09.086] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2014] [Revised: 09/03/2014] [Accepted: 09/23/2014] [Indexed: 12/16/2022]
Abstract
BACKGROUND Functional decline in stem cell-mediated regeneration contributes to aging associated with cellular senescence in c-kit+ cardiac progenitor cells (CPCs). Clinical implementation of CPC-based therapy in elderly patients would benefit tremendously from understanding molecular characteristics of senescence to antagonize aging. Nucleostemin (NS) is a nucleolar protein regulating stem cell proliferation and pluripotency. OBJECTIVES This study sought to demonstrate that NS preserves characteristics associated with "stemness" in CPCs and antagonizes myocardial senescence and aging. METHODS CPCs isolated from human fetal (fetal human cardiac progenitor cell [FhCPC]) and adult failing (adult human cardiac progenitor cell [AhCPC]) hearts, as well as young (young cardiac progenitor cell [YCPC]) and old mice (old cardiac progenitor cell [OCPC]), were studied for senescence characteristics and NS expression. Heterozygous knockout mice with 1 functional allele of NS (NS+/-) were used to demonstrate that NS preserves myocardial structure and function and slows characteristics of aging. RESULTS NS expression is decreased in AhCPCs relative to FhCPCs, correlating with lowered proliferation potential and shortened telomere length. AhCPC characteristics resemble those of OCPCs, which have a phenotype induced by NS silencing, resulting in cell flattening, senescence, multinucleated cells, decreased S-phase progression, diminished expression of stemness markers, and up-regulation of p53 and p16. CPC senescence resulting from NS loss is partially p53 dependent and is rescued by concurrent silencing of p53. Mechanistically, NS induction correlates with Pim-1 kinase-mediated stabilization of c-Myc. Engineering OCPCs and AhCPCs to overexpress NS decreases senescent and multinucleated cells, restores morphology, and antagonizes senescence, thereby preserving phenotypic properties of "stemness." Early cardiac aging with a decline in cardiac function, an increase in senescence markers p53 and p16, telomere attrition, and accompanied CPC exhaustion is evident in NS+/- mice. CONCLUSIONS Youthful properties and antagonism of senescence in CPCs and the myocardium are consistent with a role for NS downstream from Pim-1 signaling that enhances cardiac regeneration.
Collapse
Affiliation(s)
- Nirmala Hariharan
- Department of Biology, San Diego State University Heart Institute, San Diego State University, San Diego, California
| | - Pearl Quijada
- Department of Biology, San Diego State University Heart Institute, San Diego State University, San Diego, California
| | - Sadia Mohsin
- Department of Biology, San Diego State University Heart Institute, San Diego State University, San Diego, California
| | - Anya Joyo
- Department of Biology, San Diego State University Heart Institute, San Diego State University, San Diego, California
| | - Kaitlen Samse
- Department of Biology, San Diego State University Heart Institute, San Diego State University, San Diego, California
| | - Megan Monsanto
- Department of Biology, San Diego State University Heart Institute, San Diego State University, San Diego, California
| | - Andrea De La Torre
- Department of Biology, San Diego State University Heart Institute, San Diego State University, San Diego, California
| | - Daniele Avitabile
- Department of Biology, San Diego State University Heart Institute, San Diego State University, San Diego, California; Department of Clinical and Molecular Medicine, "Sapienza" University of Rome, Rome, Italy
| | - Lucia Ormachea
- Department of Biology, San Diego State University Heart Institute, San Diego State University, San Diego, California
| | - Michael J McGregor
- Department of Biology, San Diego State University Heart Institute, San Diego State University, San Diego, California
| | - Emily J Tsai
- Section in Cardiology and Cardiovascular Research Center, Temple University School of Medicine, Philadelphia, Pennsylvania
| | - Mark A Sussman
- Department of Biology, San Diego State University Heart Institute, San Diego State University, San Diego, California.
| |
Collapse
|
27
|
Awad S, Al-Haffar KMA, Marashly Q, Quijada P, Kunhi M, Al-Yacoub N, Wade FS, Mohammed SF, Al-Dayel F, Sutherland G, Assiri A, Sussman M, Bers D, Al-Habeeb W, Poizat C. Control of histone H3 phosphorylation by CaMKIIδ in response to haemodynamic cardiac stress. J Pathol 2014; 235:606-18. [PMID: 25421395 PMCID: PMC4383650 DOI: 10.1002/path.4489] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2014] [Revised: 10/30/2014] [Accepted: 11/21/2014] [Indexed: 01/23/2023]
Abstract
Heart failure is associated with the reactivation of a fetal cardiac gene programme that has become a hallmark of cardiac hypertrophy and maladaptive ventricular remodelling, yet the mechanisms that regulate this transcriptional reprogramming are not fully understood. Using mice with genetic ablation of calcium/calmodulin-dependent protein kinase II δ (CaMKIIδ), which are resistant to pathological cardiac stress, we show that CaMKIIδ regulates the phosphorylation of histone H3 at serine-10 during pressure overload hypertrophy. H3 S10 phosphorylation is strongly increased in the adult mouse heart in the early phase of cardiac hypertrophy and remains detectable during cardiac decompensation. This response correlates with up-regulation of CaMKIIδ and increased expression of transcriptional drivers of pathological cardiac hypertrophy and of fetal cardiac genes. Similar changes are detected in patients with end-stage heart failure, where CaMKIIδ specifically interacts with phospho-H3. Robust H3 phosphorylation is detected in both adult ventricular myocytes and in non-cardiac cells in the stressed myocardium, and these signals are abolished in CaMKIIδ-deficient mice after pressure overload. Mechanistically, fetal cardiac genes are activated by increased recruitment of CaMKIIδ and enhanced H3 phosphorylation at hypertrophic promoter regions, both in mice and in human failing hearts, and this response is blunted in CaMKIIδ-deficient mice under stress. We also document that the chaperone protein 14–3–3 binds phosphorylated H3 in response to stress, allowing proper elongation of fetal cardiac genes by RNA polymerase II (RNAPII), as well as elongation of transcription factors regulating cardiac hypertrophy. These processes are impaired in CaMKIIδ-KO mice after pathological stress. The findings reveal a novel in vivo function of CaMKIIδ in regulating H3 phosphorylation and suggest a novel epigenetic mechanism by which CaMKIIδ controls cardiac hypertrophy. © 2014 The Authors. The Journal of Pathology published by John Wiley & Sons Ltd on behalf of Pathological Society of Great Britain and Ireland.
Collapse
Affiliation(s)
- Salma Awad
- Cardiovascular Research Programme, King Faisal Specialist Hospital and Research Centre, Riyadh, Kingdom of Saudi Arabia
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
28
|
Völkers M, Doroudgar S, Nguyen N, Konstandin MH, Quijada P, Din S, Ornelas L, Thuerauf DJ, Gude N, Friedrich K, Herzig S, Glembotski CC, Sussman MA. PRAS40 prevents development of diabetic cardiomyopathy and improves hepatic insulin sensitivity in obesity. EMBO Mol Med 2014; 6:57-65. [PMID: 24408966 PMCID: PMC3936489 DOI: 10.1002/emmm.201303183] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023] Open
Abstract
Diabetes is a multi-organ disease and diabetic cardiomyopathy can result in heart failure, which is a leading cause of morbidity and mortality in diabetic patients. In the liver, insulin resistance contributes to hyperglycaemia and hyperlipidaemia, which further worsens the metabolic profile. Defects in mTOR signalling are believed to contribute to metabolic dysfunctions in diabetic liver and hearts, but evidence is missing that mTOR activation is causal to the development of diabetic cardiomyopathy. This study shows that specific mTORC1 inhibition by PRAS40 prevents the development of diabetic cardiomyopathy. This phenotype was associated with improved metabolic function, blunted hypertrophic growth and preserved cardiac function. In addition PRAS40 treatment improves hepatic insulin sensitivity and reduces systemic hyperglycaemia in obese mice. Thus, unlike rapamycin, mTORC1 inhibition with PRAS40 improves metabolic profile in diabetic mice. These findings may open novel avenues for therapeutic strategies using PRAS40 directed against diabetic-related diseases.
Collapse
|
29
|
Völkers M, Konstandin MH, Doroudgar S, Toko H, Quijada P, Din S, Joyo A, Ornelas L, Samse K, Thuerauf DJ, Gude N, Glembotski CC, Sussman MA. Mechanistic target of rapamycin complex 2 protects the heart from ischemic damage. Circulation 2013; 128:2132-44. [PMID: 24008870 DOI: 10.1161/circulationaha.113.003638] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND The mechanistic target of rapamycin (mTOR) comprises 2 structurally distinct multiprotein complexes, mTOR complexes 1 and 2 (mTORC1 and mTORC2). Deregulation of mTOR signaling occurs during and contributes to the severity of myocardial damage from ischemic heart disease. However, the relative roles of mTORC1 versus mTORC2 in the pathogenesis of ischemic damage are unknown. METHODS AND RESULTS Combined pharmacological and molecular approaches were used to alter the balance of mTORC1 and mTORC2 signaling in cultured cardiac myocytes and in mouse hearts subjected to conditions that mimic ischemic heart disease. The importance of mTOR signaling in cardiac protection was demonstrated by pharmacological inhibition of both mTORC1 and mTORC2 with Torin1, which led to increased cardiomyocyte apoptosis and tissue damage after myocardial infarction. Predominant mTORC1 signaling mediated by suppression of mTORC2 with Rictor similarly increased cardiomyocyte apoptosis and tissue damage after myocardial infarction. In comparison, preferentially shifting toward mTORC2 signaling by inhibition of mTORC1 with PRAS40 led to decreased cardiomyocyte apoptosis and tissue damage after myocardial infarction. CONCLUSIONS These results suggest that selectively increasing mTORC2 while concurrently inhibiting mTORC1 signaling is a novel therapeutic approach for the treatment of ischemic heart disease.
Collapse
Affiliation(s)
- Mirko Völkers
- From SDSU Heart Institute, Department of Biology, San Diego State University, San Diego, CA
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
30
|
Konstandin MH, Völkers M, Collins B, Quijada P, Quintana M, De La Torre A, Ormachea L, Din S, Gude N, Toko H, Sussman MA. Fibronectin contributes to pathological cardiac hypertrophy but not physiological growth. Basic Res Cardiol 2013; 108:375. [PMID: 23912225 DOI: 10.1007/s00395-013-0375-8] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [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] [Received: 05/16/2013] [Revised: 07/12/2013] [Accepted: 07/24/2013] [Indexed: 01/09/2023]
Abstract
Ability of the heart to undergo pathological or physiological hypertrophy upon increased wall stress is critical for long-term compensatory function in response to increased workload demand. While substantial information has been published on the nature of the fundamental molecular signaling involved in hypertrophy, the role of extracellular matrix protein Fibronectin (Fn) in hypertrophic signaling is unclear. The objective of the study was to delineate the role of Fn during pressure overload-induced pathological cardiac hypertrophy and physiological growth prompted by exercise. Genetic conditional ablation of Fn in adulthood blunts cardiomyocyte hypertrophy upon pressure overload via attenuated activation of nuclear factor of activated T cells (NFAT). Loss of Fn delays development of heart failure and improves survival. In contrast, genetic deletion of Fn has no impact on physiological cardiac growth induced by voluntary wheel running. Down-regulation of the transcription factor c/EBPβ (Ccaat-enhanced binding protein β), which is essential for induction of the physiological growth program, is unaffected by Fn deletion. Nuclear NFAT translocation is triggered by Fn in conjunction with up-regulation of the fetal gene program and hypertrophy of cardiomyocytes in vitro. Furthermore, activation of the physiological gene program induced by insulin stimulation in vitro is attenuated by Fn, whereas insulin had no impact on Fn-induced pathological growth program. Fn contributes to pathological cardiomyocyte hypertrophy in vitro and in vivo via NFAT activation. Fn is dispensable for physiological growth in vivo, and Fn attenuates the activation of the physiological growth program in vitro.
Collapse
Affiliation(s)
- Mathias H Konstandin
- Heart Institute, and Biology Department, SDSU Integrated Regenerative Research Institute, Life Sciences North, Room 426, 5500 Campanile Drive, San Diego, CA 92182, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
31
|
Hariharan N, Joyo AY, Avitabile D, Samse KM, Bailey B, Quijada P, McGregor M, Mohsin S, Siddiqi S, Sussman MA. Abstract 326: Nucleostemin Induced by Pim-1 Kinase Antagonizes Senescence of Cardiac Progenitor Cells. Circ Res 2013. [DOI: 10.1161/res.113.suppl_1.a326] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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
Decline in stem cell functionality and regenerative capability is a crucial contributor to aging, upon which the c-kit+ cardiac progenitor cell (CPC) pool with enhanced regenerative potential decreases and CPCs with limited proliferative and differentiation potential progressively accumulate. With cardiac stem cells currently being used in the clinic, especially in the elderly population, there is a dire need to understand the phenotypic, molecular and functional characteristics of senescent stem cells to effectively manipulate them for therapy. Nucleostemin (NS), a nucleolar stress sensor protein associated with stem cell pluripotency and regeneration declines upon cardiac aging. We hypothesize that NS is a critical antagonizer of senescence in CPCs. NS expression decreases significantly (-59%, p<0.05), while the % of senescent cells increases in CPCs isolated from old mice (13 month, OCPC) relative to CPCs isolated from young mice (3 month, YCPC). OCPCs are morphologically different, characterized by flat, round cells (p<0.05) with increased bi- & poly-nucleation (p<0.05), slower proliferation (-80%, p<0.01) and altered cell cycle profiles, relative to YCPCs. Decreased NS level is causal for the phenotype observed in OCPCs, as silencing NS in YCPCs induces flattening of cells, increases bi- & poly-nucleation, decreases expression of stem cell marker c-Kit (-55%, p<0.05), upregulates cell cycle inhibitors p53 and p16 (4.2, 3.8 fold, p<0.01) and decreases proliferation (p<0.05). NS-mediated regulation of CPC senescence is p53 dependent, as silencing p53 rescues the phenotype induced by NS-silencing. Interestingly, NS is induced by Pim-1 kinase-mediated stabilization of transcription factor c-Myc, as NS protein expression decreases in CPCs upon knockdown of Pim-1 (p<0.05) or c-Myc (p<0.01); and in the absence of c-Myc, Pim-1 does not upregulate NS. Engineering OCPCs with NS is an effective strategy to antagonize senescence, as observed by decreased % senescent cells, increased proliferation and restored morphology. In conclusion, NS which is induced downstream of Pim-1 kinase, maintains multipotency and inhibits senescence in CPCs, consistent with cumulative evidence that Pim-1 induced cardiac regeneration is mediated in part by NS.
Collapse
|
32
|
Konstandin MH, Toko H, Gastelum GM, Quijada P, De La Torre A, Quintana M, Collins B, Din S, Avitabile D, Völkers M, Gude N, Fässler R, Sussman MA. Fibronectin is essential for reparative cardiac progenitor cell response after myocardial infarction. Circ Res 2013; 113:115-25. [PMID: 23652800 DOI: 10.1161/circresaha.113.301152] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
RATIONALE Adoptive transfer of cardiac progenitor cells (CPCs) has entered clinical application, despite limited mechanistic understanding of the endogenous response after myocardial infarction (MI). Extracellular matrix undergoes dramatic changes after MI and therefore might be linked to CPC-mediated repair. OBJECTIVE To demonstrate the significance of fibronectin (Fn), a component of the extracellular matrix, for induction of the endogenous CPC response to MI. METHODS AND RESULTS This report shows that presence of CPCs correlates with the expression of Fn during cardiac development and after MI. In vivo, genetic conditional ablation of Fn blunts CPC response measured 7 days after MI through reduced proliferation and diminished survival. Attenuated vasculogenesis and cardiogenesis during recovery were evident at the end of a 12-week follow-up period. Impaired CPC-dependent reparative remodeling ultimately leads to continuous decline of cardiac function in Fn knockout animals. In vitro, Fn protects and induces proliferation of CPCs via β₁-integrin-focal adhesion kinase-signal transducer and activator of transcription 3-Pim1 independent of Akt. CONCLUSIONS Fn is essential for endogenous CPC expansion and repair required for stabilization of cardiac function after MI.
Collapse
Affiliation(s)
- Mathias H Konstandin
- San Diego State University Integrated Regenerative Research Institute, San Diego, CA 92182, USA
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
33
|
Khan M, Mohsin S, Avitabile D, Siddiqi S, Nguyen J, Wallach K, Quijada P, McGregor M, Gude N, Alvarez R, Tilley DG, Koch WJ, Sussman MA. β-Adrenergic regulation of cardiac progenitor cell death versus survival and proliferation. Circ Res 2012; 112:476-86. [PMID: 23243208 DOI: 10.1161/circresaha.112.280735] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.5] [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: 01/08/2023]
Abstract
RATIONALE Short-term β-adrenergic stimulation promotes contractility in response to stress but is ultimately detrimental in the failing heart because of accrual of cardiomyocyte death. Endogenous cardiac progenitor cell (CPC) activation may partially offset cardiomyocyte losses, but consequences of long-term β-adrenergic drive on CPC survival and proliferation are unknown. OBJECTIVE We sought to determine the relationship between β-adrenergic activity and regulation of CPC function. METHODS AND RESULTS Mouse and human CPCs express only β2 adrenergic receptor (β2-AR) in conjunction with stem cell marker c-kit. Activation of β2-AR signaling promotes proliferation associated with increased AKT, extracellular signal-regulated kinase 1/2, and endothelial NO synthase phosphorylation, upregulation of cyclin D1, and decreased levels of G protein-coupled receptor kinase 2. Conversely, silencing of β2-AR expression or treatment with β2-antagonist ICI 118, 551 impairs CPC proliferation and survival. β1-AR expression in CPC is induced by differentiation stimuli, sensitizing CPC to isoproterenol-induced cell death that is abrogated by metoprolol. Efficacy of β1-AR blockade by metoprolol to increase CPC survival and proliferation was confirmed in vivo by adoptive transfer of CPC into failing mouse myocardium. CONCLUSIONS β-adrenergic stimulation promotes expansion and survival of CPCs through β2-AR, but acquisition of β1-AR on commitment to the myocyte lineage results in loss of CPCs and early myocyte precursors.
Collapse
Affiliation(s)
- Mohsin Khan
- San Diego Heart Research Institute, San Diego State University, San Diego, CA 92182, USA
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
34
|
Din S, Mason M, Volkers M, Johnson B, Konstandin M, Quijada P, Nunnari J, Sussman MA. Abstract 14: Pim-1 Preserves Mitochondrial Morphology by Inhibiting Drp1 Translocation. Circ Res 2012. [DOI: 10.1161/res.111.suppl_1.a14] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [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:
Mitochondrial morphological dynamics affect the outcome of ischemic heart damage. Mitochondrial fission protein Dynamin Related Protein 1 (Drp1) is a mediator of mitochondrial morphological changes and cell death during ischemic injury. Mitochondrial integrity is maintained by cardioprotective kinase Pim1, which enhances resistance to apoptotic challenge and ischemia reperfusion injury. In this study we examine the relationship between Pim1 activity and Drp1 regulation of mitochondrial morphology in cardiomyocytes challenged by ischemia.
Objective:
To demonstrate that Pim1 inhibits Drp1 translocation to the mitochondria in response to ischemic injury.
Methods and Results:
Simulated ischemia and simulated ischemia reperfusion (sI & sI/R) induced mitochondrial fragmentation and cell death in neonatal rat cardiac myocytes (NRCM), respectively. Mitochondrial fragmentation accompanied Drp1 translocation to the mitochondria in NRCM. Inhibition of Drp1 by mdivi1 preserved mitochondrial reticular morphology and inhibited apoptotic cell death. Mice subjected to sI/R injury displayed Drp1 mitochondrial localization, while exposure to mdivi1 led to reduced infarct size. Interestingly, transgenic hearts overexpressing Pim1 decreased total Drp1 levels, increased phosphorylation of Drp1 at serine 637, and inhibited Drp1 localization to mitochondria while preserving reticular morphology after sI. In contrast, Pim1 dominant negative (PDN) transgenic hearts and NRCM exhibit increased Drp1 translocation to mitochondria and fragmented mitochondria. PDN hearts exhibit decreased phosphorylation of serine 637 and upregulation of BH3 protein PUMA, inducing Drp1 accumulation at mitochondria and increased sensitivity to apoptotic stimuli. In PDN NRCMs, overexpression of Puma dominant negative (PumaDN) attenuated localization of Drp1 to mitochondria and inhibited cell death during sI.
Conclusion:
Pim1 activity prevents Drp1 compartmentalization to the mitochondria and preserves reticular mitochondrial morphology in response to simulated ischemia. Therefore, selective manipulation of Pim1 should be pursued as a therapeutic target to maintain mitochondrial morphology for cardioprotection.
Collapse
|
35
|
Mohsin S, Khan M, Toko H, Bailey B, Cottage CT, Wallach K, Nag D, Lee A, Siddiqi S, Lan F, Fischer KM, Gude N, Quijada P, Avitabile D, Truffa S, Collins B, Dembitsky W, Wu JC, Sussman MA. Human cardiac progenitor cells engineered with Pim-I kinase enhance myocardial repair. J Am Coll Cardiol 2012; 60:1278-87. [PMID: 22841153 DOI: 10.1016/j.jacc.2012.04.047] [Citation(s) in RCA: 134] [Impact Index Per Article: 11.2] [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] [Received: 11/28/2011] [Revised: 03/09/2012] [Accepted: 04/02/2012] [Indexed: 01/09/2023]
Abstract
OBJECTIVES The goal of this study was to demonstrate the enhancement of human cardiac progenitor cell (hCPC) reparative and regenerative potential by genetic modification for the treatment of myocardial infarction. BACKGROUND Regenerative potential of stem cells to repair acute infarction is limited. Improved hCPC survival, proliferation, and differentiation into functional myocardium will increase efficacy and advance translational implementation of cardiac regeneration. METHODS hCPCs isolated from the myocardium of heart failure patients undergoing left ventricular assist device implantation were engineered to express green fluorescent protein (hCPCe) or Pim-1-GFP (hCPCeP). Functional tests of hCPC regenerative potential were performed with immunocompromised mice by using intramyocardial adoptive transfer injection after infarction. Myocardial structure and function were monitored by echocardiographic and hemodynamic assessment for 20 weeks after delivery. hCPCe and hCPCeP expressing luciferase were observed by using bioluminescence imaging to noninvasively track persistence. RESULTS hCPCeP exhibited augmentation of reparative potential relative to hCPCe control cells, as shown by significantly increased proliferation coupled with amelioration of infarction injury and increased hemodynamic performance at 20 weeks post-transplantation. Concurrent with enhanced cardiac structure and function, hCPCeP demonstrated increased cellular engraftment and differentiation with improved vasculature and reduced infarct size. Enhanced persistence of hCPCeP versus hCPCe was revealed by bioluminescence imaging at up to 8 weeks post-delivery. CONCLUSIONS Genetic engineering of hCPCs with Pim-1 enhanced repair of damaged myocardium. Ex vivo gene delivery to modify stem cells has emerged as a viable option addressing current limitations in the field. This study demonstrates that efficacy of hCPCs from the failing myocardium can be safely and significantly enhanced through expression of Pim-1 kinase, setting the stage for use of engineered cells in pre-clinical settings.
Collapse
Affiliation(s)
- Sadia Mohsin
- SDSU Heart Research Institute, San Diego State University, 5500 Campanile Drive, San Diego, CA 92182, USA
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
36
|
Quijada P, Toko H, Fischer KM, Bailey B, Reilly P, Hunt KD, Gude NA, Avitabile D, Sussman MA. Preservation of myocardial structure is enhanced by pim-1 engineering of bone marrow cells. Circ Res 2012; 111:77-86. [PMID: 22619278 DOI: 10.1161/circresaha.112.265207] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [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: 12/13/2022]
Abstract
RATIONALE Bone marrow-derived cells to treat myocardial injury improve cardiac function and support beneficial cardiac remodeling. However, survival of stem cells is limited due to low proliferation of transferred cells. OBJECTIVE To demonstrate long-term potential of c-kit(+) bone marrow stem cells (BMCs) enhanced with Pim-1 kinase to promote positive cardiac remodeling. METHODS AND RESULTS Lentiviral modification of c-kit(+) BMCs to express Pim-1 (BMCeP) increases proliferation and expression of prosurvival proteins relative to BMCs expressing green fluorescent protein (BMCe). Intramyocardial delivery of BMCeP at time of infarction supports improvements in anterior wall dimensions and prevents left ventricle dilation compared with hearts treated with vehicle alone. Reduction of the akinetic left ventricular wall was observed in BMCeP-treated hearts at 4 and 12 weeks after infarction. Early recovery of cardiac function in BMCeP-injected hearts facilitated modest improvements in hemodynamic function up to 12 weeks after infarction between cell-treated groups. Persistence of BMCeP is improved relative to BMCe within the infarct together with increased recruitment of endogenous c-kit(+) cells. Delivery of BMC populations promotes cellular hypertrophy in the border and infarcted regions coupled with an upregulation of hypertrophic genes. Thus, BMCeP treatment yields improved structural remodeling of infarcted myocardium compared with control BMCs. CONCLUSIONS Genetic modification of BMCs with Pim-1 may serve as a therapeutic approach to promote recovery of myocardial structure. Future approaches may take advantage of salutary BMC actions in conjunction with other stem cell types to increase efficacy of cellular therapy and improve myocardial performance in the injured myocardium.
Collapse
|
37
|
Sussman MA, Völkers M, Fischer K, Bailey B, Cottage CT, Din S, Gude N, Avitabile D, Alvarez R, Sundararaman B, Quijada P, Mason M, Konstandin MH, Malhowski A, Cheng Z, Khan M, McGregor M. Myocardial AKT: the omnipresent nexus. Physiol Rev 2011; 91:1023-70. [PMID: 21742795 PMCID: PMC3674828 DOI: 10.1152/physrev.00024.2010] [Citation(s) in RCA: 180] [Impact Index Per Article: 13.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
One of the greatest examples of integrated signal transduction is revealed by examination of effects mediated by AKT kinase in myocardial biology. Positioned at the intersection of multiple afferent and efferent signals, AKT exemplifies a molecular sensing node that coordinates dynamic responses of the cell in literally every aspect of biological responses. The balanced and nuanced nature of homeostatic signaling is particularly essential within the myocardial context, where regulation of survival, energy production, contractility, and response to pathological stress all flow through the nexus of AKT activation or repression. Equally important, the loss of regulated AKT activity is primarily the cause or consequence of pathological conditions leading to remodeling of the heart and eventual decompensation. This review presents an overview compendium of the complex world of myocardial AKT biology gleaned from more than a decade of research. Summarization of the widespread influence that AKT exerts upon myocardial responses leaves no doubt that the participation of AKT in molecular signaling will need to be reckoned with as a seemingly omnipresent regulator of myocardial molecular biological responses.
Collapse
Affiliation(s)
- Mark A Sussman
- Department of Biology, San Diego State University, SDSU Heart Institute, San Diego, California 92182, USA.
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
38
|
Abstract
RATIONALE Stem cell therapies to regenerate damaged cardiac tissue represent a novel approach to treat heart disease. However, the majority of adoptively transferred stem cells delivered to damaged myocardium do not survive long enough to impart protective benefits, resulting in modest functional improvements. Strategies to improve survival and proliferation of stem cells show promise for significantly enhancing cardiac function and regeneration. OBJECTIVE To determine whether injected cardiac progenitor cells (CPCs) genetically modified to overexpress nuclear Akt (CPCeA) increase structural and functional benefits to infarcted myocardium relative to control CPCs. METHODS AND RESULTS CPCeA exhibit significantly increased proliferation and secretion of paracrine factors compared with CPCs. However, CPCeA exhibit impaired capacity for lineage commitment in vitro. Infarcted hearts receiving intramyocardial injection of CPCeA have increased recruitment of endogenous c-kit cells compared with CPCs, but neither population provides long-term functional and structural improvements compared with saline-injected controls. Pharmacological inhibition of Akt alleviated blockade of lineage commitment in CPCeA. CONCLUSIONS Although overexpression of nuclear Akt promotes rapid proliferation and secretion of protective paracrine factors, the inability of CPCeA to undergo lineage commitment hinders their capacity to provide functional or structural benefits to infarcted hearts. Despite enhanced recruitment of endogenous CPCs, lack of functional improvement in CPCeA-treated hearts demonstrates CPC lineage commitment is essential to the regenerative response. Effective stem cell therapies must promote cellular survival and proliferation without inhibiting lineage commitment. Because CPCeA exhibit remarkable proliferative potential, an inducible system mediating nuclear Akt expression could be useful to augment cell therapy approaches.
Collapse
|
39
|
Borillo GA, Mason M, Quijada P, Völkers M, Cottage C, McGregor M, Din S, Fischer K, Gude N, Avitable D, Barlow S, Gustafsson AB, Glembotski C, Gottlieb RA, Brown JH, Sussman MA. Pim-1 kinase protects mitochondrial integrity in cardiomyocytes. Circ Res 2010; 106:1265-74. [PMID: 20203306 PMCID: PMC2864233 DOI: 10.1161/circresaha.109.212035] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
RATIONALE Cardioprotective signaling mediates antiapoptotic actions through multiple mechanisms including maintenance of mitochondrial integrity. Pim-1 kinase is an essential downstream effector of AKT-mediated cardioprotection but the mechanistic basis for maintenance of mitochondrial integrity by Pim-1 remains unexplored. This study details antiapoptotic actions responsible for enhanced cell survival in cardiomyocytes with elevated Pim-1 activity. OBJECTIVE The purpose of this study is to demonstrate that the cardioprotective kinase Pim-1 acts to inhibit cell death by preserving mitochondrial integrity in cardiomyocytes. METHODS AND RESULTS A combination of biochemical, molecular, and microscopic analyses demonstrate beneficial effects of Pim-1 on mitochondrial integrity. Pim-1 protein level increases in the mitochondrial fraction with a corresponding decrease in the cytosolic fraction of myocardial lysates from hearts subjected to 30 minutes of ischemia followed by 30 minutes of reperfusion. Cardiac-specific overexpression of Pim-1 results in higher levels of antiapoptotic Bcl-X(L) and Bcl-2 compared to samples from normal hearts. In response to oxidative stress challenge, Pim-1 preserves the inner mitochondrial membrane potential. Ultrastructure of the mitochondria is maintained by Pim-1 activity, which prevents swelling induced by calcium overload. Finally, mitochondria isolated from hearts created with cardiac-specific overexpression of Pim-1 show inhibition of cytochrome c release triggered by a truncated form of proapoptotic Bid. CONCLUSION Cardioprotective action of Pim-1 kinase includes preservation of mitochondrial integrity during cardiomyopathic challenge conditions, thereby raising the potential for Pim-1 kinase activation as a therapeutic interventional approach to inhibit cell death by antagonizing proapoptotic Bcl-2 family members that regulate the intrinsic apoptotic pathway.
Collapse
MESH Headings
- Animals
- Animals, Newborn
- Apoptosis
- BH3 Interacting Domain Death Agonist Protein/metabolism
- Cell Survival
- Cells, Cultured
- Cytochromes c/metabolism
- Disease Models, Animal
- Humans
- Membrane Potential, Mitochondrial
- Mice
- Mice, Transgenic
- Mitochondria, Heart/enzymology
- Mitochondria, Heart/ultrastructure
- Mitochondrial Swelling
- Myocardial Reperfusion Injury/enzymology
- Myocardial Reperfusion Injury/genetics
- Myocardial Reperfusion Injury/pathology
- Myocardial Reperfusion Injury/prevention & control
- Myocytes, Cardiac/enzymology
- Myocytes, Cardiac/ultrastructure
- Oxidative Stress
- Protein Transport
- Proto-Oncogene Proteins c-bcl-2/metabolism
- Proto-Oncogene Proteins c-pim-1/genetics
- Proto-Oncogene Proteins c-pim-1/metabolism
- Rats
- Rats, Sprague-Dawley
- Recombinant Fusion Proteins/metabolism
- Time Factors
- Transfection
- bcl-X Protein/metabolism
Collapse
Affiliation(s)
- Gwynngelle A. Borillo
- San Diego State Heart Institute, San Diego State University, San Diego, CA 92182, USA
| | - Matt Mason
- San Diego State Heart Institute, San Diego State University, San Diego, CA 92182, USA
| | - Pearl Quijada
- San Diego State Heart Institute, San Diego State University, San Diego, CA 92182, USA
| | - Mirko Völkers
- San Diego State Heart Institute, San Diego State University, San Diego, CA 92182, USA
| | - Christopher Cottage
- San Diego State Heart Institute, San Diego State University, San Diego, CA 92182, USA
| | - Michael McGregor
- San Diego State Heart Institute, San Diego State University, San Diego, CA 92182, USA
| | - Shabana Din
- San Diego State Heart Institute, San Diego State University, San Diego, CA 92182, USA
| | - Kimberlee Fischer
- San Diego State Heart Institute, San Diego State University, San Diego, CA 92182, USA
| | - Natalie Gude
- San Diego State Heart Institute, San Diego State University, San Diego, CA 92182, USA
| | - Daniele Avitable
- San Diego State Heart Institute, San Diego State University, San Diego, CA 92182, USA
| | - Steven Barlow
- San Diego State Heart Institute, San Diego State University, San Diego, CA 92182, USA
| | - Asa B. Gustafsson
- San Diego State Heart Institute, San Diego State University, San Diego, CA 92182, USA
| | | | - Roberta A. Gottlieb
- San Diego State Heart Institute, San Diego State University, San Diego, CA 92182, USA
| | - Joan Heller Brown
- Department of Pharmacology, University of California, San Diego, CA 92093-0636, USA
| | - Mark A. Sussman
- San Diego State Heart Institute, San Diego State University, San Diego, CA 92182, USA
| |
Collapse
|
40
|
Bailey B, Izarra A, Alvarez R, Fischer KM, Cottage CT, Quijada P, Díez-Juan A, Sussman MA. Cardiac stem cell genetic engineering using the alphaMHC promoter. Regen Med 2010; 4:823-33. [PMID: 19903002 DOI: 10.2217/rme.09.51] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022] Open
Abstract
AIMS Cardiac stem cells (CSCs) show potential as a cellular therapeutic approach to blunt tissue damage and facilitate reparative and regenerative processes after myocardial infarction. Despite multiple published reports of improvement, functional benefits remain modest using normal stem cells delivered by adoptive transfer into damaged myocardium. The goal of this study is to enhance survival and proliferation of CSCs that have undergone lineage commitment in early phases as evidenced by expression of proteins driven by the alpha-myosin heavy chain (alphaMHC) promoter. The early increased expression of survival kinases augments expansion of the cardiogenic CSC pool and subsequent daughter progeny. MATERIALS & METHODS Normal CSCs engineered with fluorescent reporter protein constructs under control of the alphaMHC promoter show transgene protein expression, confirming activity of the promoter in CSCs. Cultured CSCs from both nontransgenic and cardiac-specific transgenic mice expressing survival kinases driven by the alphaMHC promoter were analyzed to characterize transgene expression following treatments to promote differentiation in culture. RESULTS & CONCLUSION Therapeutic genes controlled by the alphaMHC promoter can be engineered into and expressed in CSCs and cardiomyocyte progeny with the goal of improving the efficacy of cardiac stem cell therapy.
Collapse
Affiliation(s)
- Brandi Bailey
- San Diego State University, SDSU Heart Institute, Department of Biology, San Diego, CA 92182, USA
| | | | | | | | | | | | | | | |
Collapse
|
41
|
Cottage CT, Bailey B, Fischer KM, Avitabile D, Avitable D, Collins B, Tuck S, Quijada P, Gude N, Alvarez R, Muraski J, Sussman MA. Cardiac progenitor cell cycling stimulated by pim-1 kinase. Circ Res 2010; 106:891-901. [PMID: 20075333 DOI: 10.1161/circresaha.109.208629] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [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: 12/12/2022]
Abstract
RATIONALE Cardioprotective effects of Pim-1 kinase have been previously reported but the underlying mechanistic basis may involve a combination of cellular and molecular mechanisms that remain unresolved. The elucidation of the mechanistic basis for Pim-1 mediated cardioprotection provides important insights for designing therapeutic interventional strategies to treat heart disease. OBJECTIVE Effects of cardiac-specific Pim-1 kinase expression on the cardiac progenitor cell (CPC) population were examined to determine whether Pim-1 mediates beneficial effects through augmenting CPC activity. METHODS AND RESULTS Transgenic mice created with cardiac-specific Pim-1 overexpression (Pim-wt) exhibit enhanced Pim-1 expression in both cardiomyocytes and CPCs, both of which show increased proliferative activity assessed using 5-bromodeoxyuridine (BrdU), Ki-67, and c-Myc relative to nontransgenic controls. However, the total number of CPCs was not increased in the Pim-wt hearts during normal postnatal growth or after infarction challenge. These results suggest that Pim-1 overexpression leads to asymmetric division resulting in maintenance of the CPC population. Localization and quantitation of cell fate determinants Numb and alpha-adaptin by confocal microscopy were used to assess frequency of asymmetric division in the CPC population. Polarization of Numb in mitotic phospho-histone positive cells demonstrates asymmetric division in 65% of the CPC population in hearts of Pim-wt mice versus 26% in nontransgenic hearts after infarction challenge. Similarly, Pim-wt hearts had fewer cells with uniform alpha-adaptin staining indicative of symmetrically dividing CPCs, with 36% of the CPCs versus 73% in nontransgenic sections. CONCLUSIONS These findings define a mechanistic basis for enhanced myocardial regeneration in transgenic mice overexpressing Pim-1 kinase.
Collapse
Affiliation(s)
- Christopher T Cottage
- San Diego State Heart Institute, San Diego State University, 5500 Campanile Dr, San Diego, CA 92182, USA
| | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
42
|
Fischer KM, Cottage CT, Wu W, Din S, Gude NA, Avitabile D, Quijada P, Collins BL, Fransioli J, Sussman MA. Enhancement of myocardial regeneration through genetic engineering of cardiac progenitor cells expressing Pim-1 kinase. Circulation 2009; 120:2077-87. [PMID: 19901187 DOI: 10.1161/circulationaha.109.884403] [Citation(s) in RCA: 178] [Impact Index Per Article: 11.9] [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: 01/11/2023]
Abstract
BACKGROUND Despite numerous studies demonstrating the efficacy of cellular adoptive transfer for therapeutic myocardial regeneration, problems remain for donated cells with regard to survival, persistence, engraftment, and long-term benefits. This study redresses these concerns by enhancing the regenerative potential of adoptively transferred cardiac progenitor cells (CPCs) via genetic engineering to overexpress Pim-1, a cardioprotective kinase that enhances cell survival and proliferation. METHODS AND RESULTS Intramyocardial injections of CPCs overexpressing Pim-1 were given to infarcted female mice. Animals were monitored over 4, 12, and 32 weeks to assess cardiac function and engraftment of Pim-1 CPCs with echocardiography, in vivo hemodynamics, and confocal imagery. CPCs overexpressing Pim-1 showed increased proliferation and expression of markers consistent with cardiogenic lineage commitment after dexamethasone exposure in vitro. Animals that received CPCs overexpressing Pim-1 also produced greater levels of cellular engraftment, persistence, and functional improvement relative to control CPCs up to 32 weeks after delivery. Salutary effects include reduction of infarct size, greater number of c-kit(+) cells, and increased vasculature in the damaged region. CONCLUSIONS Myocardial repair is significantly enhanced by genetic engineering of CPCs with Pim-1 kinase. Ex vivo gene delivery to enhance cellular survival, proliferation, and regeneration may overcome current limitations of stem cell-based therapeutic approaches.
Collapse
Affiliation(s)
- Kimberlee M Fischer
- San Diego State Heart Institute, San Diego State University, San Diego, CA, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
43
|
Gude NA, Emmanuel G, Wu W, Cottage CT, Fischer K, Quijada P, Muraski JA, Alvarez R, Rubio M, Schaefer E, Sussman MA. Activation of Notch-mediated protective signaling in the myocardium. Circ Res 2008; 102:1025-35. [PMID: 18369158 DOI: 10.1161/circresaha.107.164749] [Citation(s) in RCA: 147] [Impact Index Per Article: 9.2] [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
The Notch network regulates multiple cellular processes, including cell fate determination, development, differentiation, proliferation, apoptosis, and regeneration. These processes are regulated via Notch-mediated activity that involves hepatocyte growth factor (HGF)/c-Met receptor and phosphatidylinositol 3-kinase/Akt signaling cascades. The impact of HGF on Notch signaling was assessed following myocardial infarction as well as in cultured cardiomyocytes. Notch1 is activated in border zone cardiomyocytes coincident with nuclear c-Met following infarction. Intramyocardial injection of HGF enhances Notch1 and Akt activation in adult mouse myocardium. Corroborating evidence in cultured cardiomyocytes shows treatment with HGF or insulin increases levels of Notch effector Hes1 in immunoblots, whereas overexpression of activated Notch intracellular domain prompts a 3-fold increase in phosphorylated Akt. Infarcted hearts injected with adenoviral vector expressing Notch intracellular domain treatment exhibit improved hemodynamic function in comparison with control mice after 4 weeks, implicating Notch signaling in a cardioprotective role following cardiac injury. These results indicate Notch activation in cardiomyocytes is mediated through c-Met and Akt survival signaling pathways, and Notch1 signaling in turn enhances Akt activity. This mutually supportive crosstalk suggests a positive survival feedback mechanism between Notch and Akt signaling in adult myocardium following injury.
Collapse
Affiliation(s)
- Natalie A Gude
- San Diego State University Heart Institute, Department of Biology, San Diego State University, San Diego, CA 92182, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
44
|
Gavela T, Abad E, Quijada P, Brañas P. Adolescente con tortícolis refractaria. An Pediatr (Barc) 2007. [DOI: 10.1016/s1695-4033(07)70343-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
|
45
|
Reyes J, Quijada P. [Arteriovenous shunt and fistula for chronic hemodialysis]. Rev Med Chil 1971; 99:353-6. [PMID: 5097304] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023]
|