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Collins HE, Alexander BT, Care AS, Davenport MH, Davidge ST, Eghbali M, Giussani DA, Hoes MF, Julian CG, LaVoie HA, Olfert IM, Ozanne SE, Bytautiene Prewit E, Warrington JP, Zhang L, Goulopoulou S. Guidelines for assessing maternal cardiovascular physiology during pregnancy and postpartum. Am J Physiol Heart Circ Physiol 2024; 327:H191-H220. [PMID: 38758127 PMCID: PMC11380979 DOI: 10.1152/ajpheart.00055.2024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 04/22/2024] [Accepted: 05/08/2024] [Indexed: 05/18/2024]
Abstract
Maternal mortality rates are at an all-time high across the world and are set to increase in subsequent years. Cardiovascular disease is the leading cause of death during pregnancy and postpartum, especially in the United States. Therefore, understanding the physiological changes in the cardiovascular system during normal pregnancy is necessary to understand disease-related pathology. Significant systemic and cardiovascular physiological changes occur during pregnancy that are essential for supporting the maternal-fetal dyad. The physiological impact of pregnancy on the cardiovascular system has been examined in both experimental animal models and in humans. However, there is a continued need in this field of study to provide increased rigor and reproducibility. Therefore, these guidelines aim to provide information regarding best practices and recommendations to accurately and rigorously measure cardiovascular physiology during normal and cardiovascular disease-complicated pregnancies in human and animal models.
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Grants
- HL169157 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- HD083132 HHS | NIH | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- Jewish Heritage Fund for Excellence
- The Biotechnology and Biological Sciences Research Council
- P20GM103499 HHS | NIH | National Institute of General Medical Sciences (NIGMS)
- Distinguished University Professor
- HL146562 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- The Lister Insititute
- ES032920 HHS | NIH | National Institute of Environmental Health Sciences (NIEHS)
- Canadian Insitute's of Health Research Foundation Grant
- HL149608 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- Christenson professor In Active Healthy Living
- Royal Society (The Royal Society)
- U.S. Department of Defense (DOD)
- HL138181 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- MC_00014/4 UKRI | Medical Research Council (MRC)
- HD111908 HHS | NIH | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- HL163003 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- APP2002129 NHMRC Ideas Grant
- HL159865 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- British Heart Foundation (BHF)
- HL131182 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- HL163818 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- NS103017 HHS | NIH | National Institute of Neurological Disorders and Stroke (NINDS)
- HL143459 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- 20CSA35320107 American Heart Association (AHA)
- RG/17/12/33167 British Heart Foundation (BHF)
- National Heart Foundation Future Leader Fellowship
- P20GM121334 HHS | NIH | National Institute of General Medical Sciences (NIGMS)
- HL146562-04S1 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- HL155295 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- HD088590-06 HHS | NIH | Eunice Kennedy Shriver National Institute of Child Health and Human Development (NICHD)
- HL147844 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- WVU SOM Synergy Grant
- R01 HL146562 NHLBI NIH HHS
- HL159447 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- ES034646-01 HHS | NIH | National Institute of Environmental Health Sciences (NIEHS)
- HL150472 HHS | NIH | National Heart, Lung, and Blood Institute (NHLBI)
- 2021T017 Dutch Heart Foundation Dekker Grant
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Affiliation(s)
- Helen E Collins
- University of Louisville, Louisville, Kentucky, United States
| | - Barbara T Alexander
- University of Mississippi Medical Center, Jackson, Mississippi, United States
| | - Alison S Care
- University of Adelaide, Adelaide, South Australia, Australia
| | | | | | - Mansoureh Eghbali
- University of California Los Angeles, Los Angeles, California, United States
| | | | | | - Colleen G Julian
- University of Colorado School of Medicine, Aurora, Colorado, United States
| | - Holly A LaVoie
- University of South Carolina School of Medicine, Columbia, South Carolina, United States
| | - I Mark Olfert
- West Virginia University School of Medicine, Morgantown, West Virginia, United States
| | | | | | - Junie P Warrington
- University of Mississippi Medical Center, Jackson, Mississippi, United States
| | - Lubo Zhang
- Loma Linda University School of Medicine, Loma Linda, California, United States
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Gawargi FI, Mishra PK. Regulation of cardiac ferroptosis in diabetic human heart failure: uncovering molecular pathways and key targets. Cell Death Discov 2024; 10:268. [PMID: 38824159 PMCID: PMC11144210 DOI: 10.1038/s41420-024-02044-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2024] [Revised: 05/20/2024] [Accepted: 05/23/2024] [Indexed: 06/03/2024] Open
Abstract
Diabetes significantly increases the risk of heart failure by inducing myocardial cell death, potentially through ferroptosis-an iron-dependent, non-apoptotic cell death pathway characterized by lipid peroxidation. The role of cardiac ferroptosis in human heart failure, however, remains poorly understood. In this study, we compared cardiac ferroptosis in humans with diabetic heart failure to that in healthy controls. Our findings reveal that diabetes not only intensifies myocardial cell death but also upregulates markers of ferroptosis in human hearts. This is linked to decreased transcription and activity of glutathione peroxidase-4 (GPX4), influenced by reduced levels of activating transcription factor-4 (ATF4) and nuclear factor erythroid-2-related factor-2 (NRF2), and downregulation of glutathione reductase (GSR). Additionally, diabetic hearts showed an increased labile iron pool due to enhanced heme metabolism by heme oxygenase-1 (HMOX1), elevated iron import via divalent metal transporter-1 (DMT1), reduced iron storage through ferritin light chain (FLC), and decreased iron export via ferroportin-1 (FPN1). The reduction in FPN1 levels likely results from decreased stabilization by amyloid precursor protein (APP) and diminished NRF2-mediated transcription. Furthermore, diabetes upregulates lysophosphatidylcholine acyltransferase-3 (LPCAT3), facilitating the integration of polyunsaturated fatty acids (PUFA) into phospholipid membranes, and downregulates acyl-CoA thioesterase-1 (ACOT1), which further promotes ferroptosis. LC-MS/MS analysis identified several novel proteins implicated in diabetes-induced cardiac ferroptosis, including upregulated ceruloplasmin, which enhances iron metabolism, and cytochrome b-245 heavy chain (CYBB), a key component of NADPH oxidase that aids in the production of reactive oxygen species (ROS), along with downregulated voltage-dependent anion-selective channel protein-2 (VDAC2), essential for maintaining mitochondrial membrane potential. In conclusion, our study not only confirms the presence and potentially predominant role of cardiac ferroptosis in humans with diabetic heart failure but also elucidates its molecular mechanisms, offering potential therapeutic targets to mitigate heart failure complications in diabetic patients.
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Affiliation(s)
- Flobater I Gawargi
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Paras K Mishra
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE, USA.
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Gawargi FI, Mishra PK. Deciphering MMP9's dual role in regulating SOD3 through protein-protein interactions. Can J Physiol Pharmacol 2024; 102:196-205. [PMID: 37992301 DOI: 10.1139/cjpp-2023-0256] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2023]
Abstract
Although the collagenase enzyme activity of matrix metalloproteinase-9 (MMP9) is well-documented, its non-enzymatic functions remain less understood. The interaction between intracellular superoxide dismutase-1 (SOD1) and MMP9 is known, with SOD1 suppressing MMP9. However, the mechanism by which MMP9, a secretory protein, influences the extracellular antioxidant superoxide dismutase-3 (SOD3) is not yet clear. To explore MMP9's regulatory impact on SOD3, we employed human embryonic kidney-293 cells, transfecting them with MMP9 overexpresssion and catalytic-site mutant plasmids. Additionally, MMP9 overexpressing cells were treated with an MMP9 activator and inhibitor. Analyses of both cell lysates and culture medium provided insights into MMP9's intracellular and extracellular regulatory roles. In-silico analysis and experimental approaches like proximal ligation assay and co-immunoprecipitation were utilized to delineate the protein-protein interactions between MMP9 and SOD3. Our findings indicate that activated MMP9 enhances SOD3 levels, a regulation not hindered by MMP9 inhibitors. Intriguingly, catalytically inactive MMP9 appeared to reduce SOD3 levels, likely due to MMP9's binding with SOD3, leading to their proteolytic degradation. This MMP9 influence on SOD3 was consistent in both intracellular and extracellular environments, suggesting a parallel in MMP9-SOD3 interactions across these domains. Ultimately, this study unveils a novel interaction between MMP9 and SOD3, highlighting the unique regulatory role of catalytically inactive MMP9 in diminishing SOD3 levels, contrasting its usual upregulation by active MMP9.
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Affiliation(s)
- Flobater I Gawargi
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE, USA
| | - Paras K Mishra
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE, USA
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Brooks HL, de Castro Brás LE, Brunt KR, Sylvester MA, Parvatiyar MS, Sirish P, Bansal SS, Sule R, Eadie AL, Knepper MA, Fenton RA, Lindsey ML, DeLeon-Pennell KY, Gomes AV. Guidelines on antibody use in physiology research. Am J Physiol Renal Physiol 2024; 326:F511-F533. [PMID: 38234298 PMCID: PMC11208033 DOI: 10.1152/ajprenal.00347.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/08/2024] [Accepted: 01/08/2024] [Indexed: 01/19/2024] Open
Abstract
Antibodies are one of the most used reagents in scientific laboratories and are critical components for a multitude of experiments in physiology research. Over the past decade, concerns about many biological methods, including those that use antibodies, have arisen as several laboratories were unable to reproduce the scientific data obtained in other laboratories. The lack of reproducibility could be largely attributed to inadequate reporting of detailed methods, no or limited verification by authors, and the production and use of unvalidated antibodies. The goal of this guideline article is to review best practices concerning commonly used techniques involving antibodies, including immunoblotting, immunohistochemistry, and flow cytometry. Awareness and integration of best practices will increase the rigor and reproducibility of these techniques and elevate the quality of physiology research.
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Affiliation(s)
- Heddwen L Brooks
- Department of Physiology, Tulane University School of Medicine, New Orleans, Louisiana, United States
| | | | - Keith R Brunt
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Saint John, New Brunswick, Canada
| | - Megan A Sylvester
- Department of Physiology, College of Medicine, University of Arizona, Tucson, Arizona, United States
| | - Michelle S Parvatiyar
- Department of Nutrition and Integrative Physiology, Florida State University, Tallahassee, Florida, United States
| | - Padmini Sirish
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of California, Davis, California, United States
| | - Shyam S Bansal
- Department of Cellular and Molecular Physiology, Heart and Vascular Institute, Pennsylvania State University Hershey Medical Center, Hershey, Pennsylvania, United States
| | - Rasheed Sule
- Department of Neurobiology, Physiology and Behavior, University of California, Davis, California, United States
| | - Ashley L Eadie
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Saint John, New Brunswick, Canada
| | - Mark A Knepper
- Epithelial Systems Biology Laboratory, National Heart, Lung, and Blood Institute, National Institutes of Health, Bethesda, Maryland, United States
| | - Robert A Fenton
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - Merry L Lindsey
- School of Graduate Studies, Meharry Medical College, Nashville, Tennessee, United States
- Research Service, Nashville Veterans Affairs Medical Center, Nashville, Tennessee, United States
| | - Kristine Y DeLeon-Pennell
- Division of Cardiology, Department of Medicine, School of Medicine, Medical University of South Carolina, Charleston, South Carolina, United States
- Research Service, Ralph H Johnson Veterans Affairs Medical Center, Charleston, South Carolina, United States
| | - Aldrin V Gomes
- Department of Neurobiology, Physiology and Behavior, University of California, Davis, California, United States
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Shimoda LA. Feeling good: welcoming the new editorial team for American Journal of Physiology-Lung Cellular and Molecular Physiology. Am J Physiol Lung Cell Mol Physiol 2024; 326:L1-L6. [PMID: 38032943 DOI: 10.1152/ajplung.00359.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2023] [Accepted: 11/29/2023] [Indexed: 12/02/2023] Open
Affiliation(s)
- Larissa A Shimoda
- Division of Pulmonary and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, Maryland, United States
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Verzeroli C, Hernandez CA, Zoulim F, Parent R. A fluorescent Ponceau S-based total protein normalization method for conventional and challenging immunoblot samples. Anal Biochem 2023; 681:115330. [PMID: 37722522 DOI: 10.1016/j.ab.2023.115330] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2023] [Revised: 09/11/2023] [Accepted: 09/15/2023] [Indexed: 09/20/2023]
Abstract
Immunoblotting normalization issues have been recently overcome by whole lane staining. Herein, we are taking advantage of these recent advances and of the fluorophore status of the Ponceau S stain in order to combine the advantages of whole lane staining and fluorescence. By Ponceau S excitation at 488 nm, we identify the so-called 'fluorescent Ponceau' method as more linear, more sensitive and more repeatable than the others in protein lysates of distant biochemical profiles (cells, human and mouse tissues). This essentially cost-free method at the single experiment level provides accessible and robust means for post-blot normalization of many types of analytes.
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Affiliation(s)
- Claire Verzeroli
- Hepatitis Viruses and Pathobiology of Chronic Liver Diseases - LabEx DEVweCAN, Inserm U1052, Cancer Research Centre of Lyon, F-69003, Lyon, France; University of Lyon, F-69003, Lyon, France; University of Lyon 1, ISPB, Lyon, F-69622, France; CNRS UMR5286, F-69083, Lyon, France; Centre Léon Bérard, F-69008, Lyon, France
| | - Charlotte A Hernandez
- Hepatitis Viruses and Pathobiology of Chronic Liver Diseases - LabEx DEVweCAN, Inserm U1052, Cancer Research Centre of Lyon, F-69003, Lyon, France; University of Lyon, F-69003, Lyon, France; University of Lyon 1, ISPB, Lyon, F-69622, France; CNRS UMR5286, F-69083, Lyon, France; Centre Léon Bérard, F-69008, Lyon, France
| | - Fabien Zoulim
- Hepatitis Viruses and Pathobiology of Chronic Liver Diseases - LabEx DEVweCAN, Inserm U1052, Cancer Research Centre of Lyon, F-69003, Lyon, France; University of Lyon, F-69003, Lyon, France; University of Lyon 1, ISPB, Lyon, F-69622, France; CNRS UMR5286, F-69083, Lyon, France; Centre Léon Bérard, F-69008, Lyon, France
| | - Romain Parent
- Hepatitis Viruses and Pathobiology of Chronic Liver Diseases - LabEx DEVweCAN, Inserm U1052, Cancer Research Centre of Lyon, F-69003, Lyon, France; University of Lyon, F-69003, Lyon, France; University of Lyon 1, ISPB, Lyon, F-69622, France; CNRS UMR5286, F-69083, Lyon, France; Centre Léon Bérard, F-69008, Lyon, France.
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Yuan L, Ji HG, Yan XJ, Liu M, Ding YH, Chen XH. Dioscin ameliorates doxorubicin-induced heart failure via inhibiting autophagy and apoptosis by controlling the PDK1-mediated Akt/mTOR signaling pathway. Kaohsiung J Med Sci 2023; 39:1022-1029. [PMID: 37578093 DOI: 10.1002/kjm2.12740] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Revised: 06/20/2023] [Accepted: 06/27/2023] [Indexed: 08/15/2023] Open
Abstract
Heart failure (HF) is a disease with high mortality and morbidity rate. Autophagy is critically implicated in HF progression. The current research was designed to investigate the function of Dioscin on oxidative stress, autophagy, and apoptosis in HF. In this study, doxorubicin (Dox) was employed to induce HF model and HL-1 cell damage model. Echocardiography implied that Dioscin could dramatically relieve heart function in vivo. Western blotting determined that Dioscin treatment reversed the promotive effect of autophagy caused by Dox through modulating levels of key autophagy-associated molecules, including Atg5 and Beclin1. Dioscin also impaired apoptosis by regulating apoptosis-related protein, including Bcl-2 and cleaved caspase-3 following Dox treatment in vivo and in vitro. Furthermore, the impacts of Dioscin were mediated by upregulation of PDK1-mediated Akt/mTOR signaling. The mTOR inhibitor (rapamycin) could counteract the therapeutic impact of Dioscin in vitro. Taken together, Dioscin could relieve cardiac function through blocking apoptosis and autophagy by activating the PDK1-elicited Akt/mTOR pathway.
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Affiliation(s)
- Ling Yuan
- Department of Cardiology, Affiliated Hospital of Nanjing University of Chinese Medicine/Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
- Department of Cardiology, Changzhou Hospital Affiliated to Nanjing University of Chinese Medicine, Changzhou, China
| | - Hai-Gang Ji
- Department of Cardiology, Changzhou Hospital Affiliated to Nanjing University of Chinese Medicine, Changzhou, China
| | - Xiao-Jing Yan
- Changzhou Key Laboratory of Human Use Experience Research & Transformation of Menghe Medical School, Changzhou Hospital Affiliated to Nanjing University of Chinese Medicine, Changzhou, China
| | - Meng Liu
- Department of Cardiology, Affiliated Hospital of Nanjing University of Chinese Medicine/Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
| | - Yu-Han Ding
- Department of Cardiology, Affiliated Hospital of Nanjing University of Chinese Medicine/Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
| | - Xiao-Hu Chen
- Department of Cardiology, Affiliated Hospital of Nanjing University of Chinese Medicine/Jiangsu Province Hospital of Chinese Medicine, Nanjing, China
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Williams MD, Bullock MT, Johnson SC, Holland NA, Vuncannon DM, Oswald JZ, Adderley SP, Tulis DA. Protease-Activated Receptor 2 Controls Vascular Smooth Muscle Cell Proliferation in Cyclic AMP-Dependent Protein Kinase/Mitogen-Activated Protein Kinase Kinase 1/2-Dependent Manner. J Vasc Res 2023; 60:213-226. [PMID: 37778342 PMCID: PMC10614497 DOI: 10.1159/000532032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2023] [Accepted: 07/06/2023] [Indexed: 10/03/2023] Open
Abstract
INTRODUCTION Cardiovascular disorders are characterized by vascular smooth muscle (VSM) transition from a contractile to proliferative state. Protease-activated receptor 2 (PAR2) involvement in this phenotypic conversion remains unclear. We hypothesized that PAR2 controls VSM cell proliferation in phenotype-dependent manner and through specific protein kinases. METHODS Rat clonal low (PLo; P3-P6) and high passage (PHi; P10-P15) VSM cells were established as respective models of quiescent and proliferative cells, based on reduced PKG-1 and VASP. Western blotting determined expression of cytoskeletal/contractile proteins, PAR2, and select protein kinases. DNA synthesis and cell proliferation were measured 24-72 h following PAR2 agonism (SLIGRL; 100 nM-10 μm) with/without PKA (PKI; 10 μm), MEK1/2 (PD98059; 10 μm), and PI3K (LY294002; 1 μm) blockade. RESULTS PKG-1, VASP, SM22α, calponin, cofilin, and PAR2 were reduced in PHi versus PLo cells. Following PAR2 agonism, DNA synthesis and cell proliferation increased in PLo cells but decreased in PHi cells. Western analyses showed reduced PKA, MEK1/2, and PI3K in PHi versus PLo cells, and kinase blockade revealed PAR2 controls VSM cell proliferation through PKA/MEK1/2. DISCUSSION Findings highlight PAR2 and PAR2-driven PKA/MEK1/2 in control of VSM cell growth and provide evidence for continued investigation of PAR2 in VSM pathology.
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Affiliation(s)
- Madison D Williams
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
| | - Michael T Bullock
- Edward Via College of Osteopathic Medicine, Carolinas Campus, Spartanburg, South Carolina, USA
| | - Sean C Johnson
- Department of Internal Medicine/Pediatrics, Indiana University School of Medicine, Indianapolis, Indiana, USA
| | - Nathan A Holland
- Department of Medical Education, Texas Tech University Health Sciences Center El Paso, El Paso, Texas, USA
| | - Danielle M Vuncannon
- Department of Gynecology and Obstetrics, Emory University School of Medicine, Atlanta, Georgia, USA
| | - Joani Zary Oswald
- Department of Anatomy and Cell Biology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
| | | | - David A Tulis
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
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Umbarkar P, Ejantkar S, Ruiz Ramirez SY, Toro Cora A, Zhang Q, Tousif S, Lal H. Cardiac fibroblast GSK-3α aggravates ischemic cardiac injury by promoting fibrosis, inflammation, and impairing angiogenesis. Basic Res Cardiol 2023; 118:35. [PMID: 37656238 PMCID: PMC11340261 DOI: 10.1007/s00395-023-01005-1] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/30/2023] [Revised: 08/14/2023] [Accepted: 08/16/2023] [Indexed: 09/02/2023]
Abstract
Myocardial infarction (MI) is the leading cause of death worldwide. Glycogen synthase kinase-3 (GSK-3) has been considered to be a promising therapeutic target for cardiovascular diseases. GSK-3 is a family of ubiquitously expressed serine/threonine kinases. GSK-3 isoforms appear to play overlapping, unique, and even opposing functions in the heart. Previously, our group identified that cardiac fibroblast (FB) GSK-3β acts as a negative regulator of fibrotic remodeling in the ischemic heart. However, the role of FB-GSK-3α in MI pathology is not defined. To determine the role of FB-GSK-3α in MI-induced adverse cardiac remodeling, GSK-3α was deleted specifically in the residential fibroblast or myofibroblast (MyoFB) using tamoxifen (TAM) inducible Tcf21 or Periostin (Postn) promoter-driven Cre recombinase, respectively. Echocardiographic analysis revealed that FB- or MyoFB-specific GSK-3α deletion prevented the development of dilative remodeling and cardiac dysfunction. Morphometrics and histology studies confirmed improvement in capillary density and a remarkable reduction in hypertrophy and fibrosis in the KO group. We harvested the hearts at 4 weeks post-MI and analyzed signature genes of adverse remodeling. Specifically, qPCR analysis was performed to examine the gene panels of inflammation (TNFα, IL-6, IL-1β), fibrosis (COL1A1, COL3A1, COMP, Fibronectin-1, Latent TGF-β binding protein 2), and hypertrophy (ANP, BNP, MYH7). These molecular markers were essentially normalized due to FB-specific GSK-3α deletion. Further molecular studies confirmed that FB-GSK-3α could regulate NF-kB activation and expression of angiogenesis-related proteins. Our findings suggest that FB-GSK-3α plays a critical role in the pathological cardiac remodeling of ischemic hearts, therefore, it could be therapeutically targeted.
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Affiliation(s)
- Prachi Umbarkar
- Division of Cardiovascular Disease, UAB|The University of Alabama at Birmingham, 1720 2nd Ave South, Birmingham, AL, 35294-1913, USA.
| | - Suma Ejantkar
- Division of Cardiovascular Disease, UAB|The University of Alabama at Birmingham, 1720 2nd Ave South, Birmingham, AL, 35294-1913, USA
| | - Sulivette Y Ruiz Ramirez
- Division of Cardiovascular Disease, UAB|The University of Alabama at Birmingham, 1720 2nd Ave South, Birmingham, AL, 35294-1913, USA
| | - Angelica Toro Cora
- Division of Cardiovascular Disease, UAB|The University of Alabama at Birmingham, 1720 2nd Ave South, Birmingham, AL, 35294-1913, USA
| | - Qinkun Zhang
- Division of Cardiovascular Disease, UAB|The University of Alabama at Birmingham, 1720 2nd Ave South, Birmingham, AL, 35294-1913, USA
| | - Sultan Tousif
- Division of Cardiovascular Disease, UAB|The University of Alabama at Birmingham, 1720 2nd Ave South, Birmingham, AL, 35294-1913, USA
| | - Hind Lal
- Division of Cardiovascular Disease, UAB|The University of Alabama at Birmingham, 1720 2nd Ave South, Birmingham, AL, 35294-1913, USA.
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Sule R, Rivera G, Gomes AV. Western blotting (immunoblotting): history, theory, uses, protocol and problems. Biotechniques 2023; 75:99-114. [PMID: 36971113 DOI: 10.2144/btn-2022-0034] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/29/2023] Open
Abstract
Western blotting (immunoblotting) is a powerful and commonly used technique that is capable of detecting or semiquantifying an individual protein from complex mixtures of proteins extracted from cells or tissues. The history surrounding the origin of western blotting, the theory behind the western blotting technique, a comprehensive protocol and the uses of western blotting are presented. Lesser known and significant problems in the western blotting field and troubleshooting of common problems are highlighted and discussed. This work is a comprehensive primer and guide for new western blotting researchers and those interested in a better understanding of the technique or getting better results.
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Affiliation(s)
- Rasheed Sule
- Department of Neurobiology, Physiology & Behavior, University of California, Davis, Davis, CA 95616, USA
| | - Gabriela Rivera
- Department of Neurobiology, Physiology & Behavior, University of California, Davis, Davis, CA 95616, USA
| | - Aldrin V Gomes
- Department of Neurobiology, Physiology & Behavior, University of California, Davis, Davis, CA 95616, USA
- Department of Physiology & Membrane Biology, University of California, Davis, Davis, CA 95616, USA
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Francisco JT, Holt AW, Bullock MT, Williams MD, Poovey CE, Holland NA, Brault JJ, Tulis DA. FoxO3 normalizes Smad3-induced arterial smooth muscle cell growth. Front Physiol 2023; 14:1136998. [PMID: 37693008 PMCID: PMC10483145 DOI: 10.3389/fphys.2023.1136998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2023] [Accepted: 08/10/2023] [Indexed: 09/12/2023] Open
Abstract
Transition of arterial smooth muscle (ASM) from a quiescent, contractile state to a growth-promoting state is a hallmark of cardiovascular disease (CVD), a leading cause of death and disability in the United States and worldwide. While many individual signals have been identified as important mechanisms in this phenotypic conversion, the combined impact of the transcription factors Smad3 and FoxO3 in ASM growth is not known. The purpose of this study was to determine that a coordinated, phosphorylation-specific relationship exists between Smad3 and FoxO3 in the control of ASM cell growth. Using a rat in vivo arterial injury model and rat primary ASM cell lysates and fractions, validated low and high serum in vitro models of respective quiescent and growth states, and adenoviral (Ad-) gene delivery for overexpression (OE) of individual and combined Smad3 and/or FoxO3, we hypothesized that FoxO3 can moderate Smad3-induced ASM cell growth. Key findings revealed unique cellular distribution of Smad3 and FoxO3 under growth conditions, with induction of both nuclear and cytosolic Smad3 yet primarily cytosolic FoxO3; Ad-Smad3 OE leading to cytosolic and nuclear expression of phosphorylated and total Smad3, with almost complete reversal of each with Ad-FoxO3 co-infection in quiescent and growth conditions; Ad-FoxO3 OE leading to enhanced cytosolic expression of phosphorylated and total FoxO3, both reduced with Ad-Smad3 co-infection in quiescent and growth conditions; Ad-FoxO3 inducing expression and activity of the ubiquitin ligase MuRF-1, which was reversed with concomitant Ad-Smad3 OE; and combined Smad3/FoxO3 OE reversing both the pro-growth impact of singular Smad3 and the cytostatic impact of singular FoxO3. A primary takeaway from these observations is the capacity of FoxO3 to reverse growth-promoting effects of Smad3 in ASM cells. Additional findings lend support for reciprocal antagonism of Smad3 on FoxO3-induced cytostasis, and these effects are dependent upon discrete phosphorylation states and cellular localization and involve MuRF-1 in the control of ASM cell growth. Lastly, results showing capacity of FoxO3 to normalize Smad3-induced ASM cell growth largely support our hypothesis, and overall findings provide evidence for utility of Smad3 and/or FoxO3 as potential therapeutic targets against abnormal ASM growth in the context of CVD.
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Affiliation(s)
| | | | | | | | | | | | | | - David A. Tulis
- Department of Physiology, Brody School of Medicine, East Carolina University, Greenville, NC, United States
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12
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O'Donoghue L, Comer SP, Hiebner DW, Schoen I, von Kriegsheim A, Smolenski A. RhoGAP6 interacts with COPI to regulate protein transport. Biochem J 2023; 480:1109-1127. [PMID: 37409526 DOI: 10.1042/bcj20230013] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2023] [Revised: 07/04/2023] [Accepted: 07/05/2023] [Indexed: 07/07/2023]
Abstract
RhoGAP6 is the most highly expressed GTPase-activating protein (GAP) in platelets specific for RhoA. Structurally RhoGAP6 contains a central catalytic GAP domain surrounded by large, disordered N- and C-termini of unknown function. Sequence analysis revealed three conserved consecutive overlapping di-tryptophan motifs close to the RhoGAP6 C-terminus which were predicted to bind to the mu homology domain (MHD) of δ-COP, a component of the COPI vesicle complex. We confirmed an endogenous interaction between RhoGAP6 and δ-COP in human platelets using GST-CD2AP which binds an N-terminal RhoGAP6 SH3 binding motif. Next, we confirmed that the MHD of δ-COP and the di-tryptophan motifs of RhoGAP6 mediate the interaction between both proteins. Each of the three di-tryptophan motifs appeared necessary for stable δ-COP binding. Proteomic analysis of other potential RhoGAP6 di-tryptophan motif binding partners indicated that the RhoGAP6/δ-COP interaction connects RhoGAP6 to the whole COPI complex. 14-3-3 was also established as a RhoGAP6 binding partner and its binding site was mapped to serine 37. We provide evidence of potential cross-regulation between 14-3-3 and δ-COP binding, however, neither δ-COP nor 14-3-3 binding to RhoGAP6 impacted RhoA activity. Instead, analysis of protein transport through the secretory pathway demonstrated that RhoGAP6/δ-COP binding increased protein transport to the plasma membrane, as did a catalytically inactive mutant of RhoGAP6. Overall, we have identified a novel interaction between RhoGAP6 and δ-COP which is mediated by conserved C-terminal di-tryptophan motifs, and which might control protein transport in platelets.
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Affiliation(s)
- Lorna O'Donoghue
- UCD School of Medicine, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield Dublin 4, Ireland
- Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, 123 St Stephen's Green, Dublin D02 YN77, Ireland
| | - Shane P Comer
- UCD School of Medicine, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield Dublin 4, Ireland
- Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, 123 St Stephen's Green, Dublin D02 YN77, Ireland
| | - Dishon W Hiebner
- Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, 123 St Stephen's Green, Dublin D02 YN77, Ireland
- UCD School of Chemical & Bioprocess Engineering, Engineering & Materials Science Centre, University College Dublin, Belfield Dublin 4, Ireland
| | - Ingmar Schoen
- Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, 123 St Stephen's Green, Dublin D02 YN77, Ireland
- School of Pharmacy and Biomolecular Sciences, Royal College of Surgeons in Ireland (RCSI), 123 St Stephen's Green, Dublin D02 YN77, Ireland
| | - Alex von Kriegsheim
- Edinburgh Cancer Research UK Centre, Institute of Genetics and Molecular Medicine, University of Edinburgh, Crewe Road South, Edinburgh EH4 2XR, U.K
| | - Albert Smolenski
- UCD School of Medicine, Conway Institute of Biomolecular and Biomedical Research, University College Dublin, Belfield Dublin 4, Ireland
- Irish Centre for Vascular Biology, Royal College of Surgeons in Ireland, 123 St Stephen's Green, Dublin D02 YN77, Ireland
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13
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Rees PA, Lowy RJ. Optimizing reduction of western blotting analytical variations: Use of replicate test samples, multiple normalization methods, and sample loading positions. Anal Biochem 2023:115198. [PMID: 37302777 DOI: 10.1016/j.ab.2023.115198] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2023] [Revised: 05/23/2023] [Accepted: 05/27/2023] [Indexed: 06/13/2023]
Abstract
Western blot (WB) analysis is widely used, but obtaining consistent results can be problematic, especially when using multiple gels. This study examines WB performance by explicitly applying a method commonly used to test analytical instrumentation. Test samples were lysates from RAW 264.7 murine macrophages treated with LPS to activate MAPK and NF-kB signaling targets. Samples from the pooled cell lysates placed in every lane on multiple gels were analyzed by WBs for levels of p-ERK, ERK, IkBβ and non-target protein. Different normalization methods and sample groupings were applied to the density values and the resulting coefficients of variation (CV) and ratios of maximal to minimal values (Max/Min) were compared. Ideally with identical sample replicates the CVs would be 0 and the Max/Min 1; deviation indicating introduction of variability by the WB process. Common normalizations to reduce analytical variance, total lane protein, % Control, and p-ERK/ERK ratios, did not have the lowest CVs or Max/Min values. Normalization using the sum of target protein values combined with analytical replication most effectively reduced variability, resulting CV and Max/Min values as low as 5-10% and 1.1. These methods should allow reliable interpretation of complex experiments that require samples to be placed on multiple gels.
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Affiliation(s)
- Phyllis A Rees
- Scientific Research Department, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD, USA
| | - R Joel Lowy
- Scientific Research Department, Armed Forces Radiobiology Research Institute, Uniformed Services University of the Health Sciences, Bethesda, MD, USA.
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14
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Thorsen ASF, Riber LPS, Rasmussen LM, Overgaard M. A targeted multiplex mass spectrometry method for quantitation of abundant matrix and cellular proteins in formalin-fixed paraffin embedded arterial tissue. J Proteomics 2023; 272:104775. [PMID: 36414230 DOI: 10.1016/j.jprot.2022.104775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2022] [Revised: 08/30/2022] [Accepted: 11/17/2022] [Indexed: 11/20/2022]
Abstract
Assessment of proteins in formalin-fixed paraffin-embedded (FFPE) tissue traditionally hinges on immunohistochemistry and immunoblotting. These methods are far from optimal for quantitative studies and not suitable for large-scale testing of multiple protein panels. In this study, we developed and optimised a novel targeted isotope dilution mass spectrometry (MS)-based method for FFPE samples, designed to quantitate 17 matrix and cytosolic proteins abundantly present in arterial tissue. Our new method was developed on FFPE human tissue samples of the internal thoracic artery obtained from coronary artery bypass graft (CABG) operations. The workflow has a limit of 60 samples per day. Assay precision improved by normalisation to both beta-actin and smooth muscle actin with inter-assay coefficients of variation (CV) ranging from 5.3% to 31.9%. To demonstrate clinical utility of the assay we analysed 40 FFPE artery specimens from two groups of patients with or without type 2 diabetes. We observed increased levels of collagen type IV α1 and α2 in patients with diabetes. The assay is scalable for larger cohorts and advantageous for pathophysiological studies in diabetes and the method is easily convertible to analysis of other proteins in FFPE artery samples. SIGNIFICANCE: This article presents a novel robust and precise targeted mass spectrometry assay for relative quantitation of a panel of abundant matrix and cellular arterial proteins in archived formalin-fixed paraffin-embedded arterial samples. We demonstrate its utility in pathophysiological studies of cardiovascular disease in diabetes.
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Affiliation(s)
- Anne-Sofie Faarvang Thorsen
- Department of Clinical Biochemistry and Center for Individualised Medicine in Arterial Diseases (CIMA), Odense University Hospital, Odense, Denmark; Department of Clinical Research, University of Southern Denmark, Odense, Denmark; Steno Diabetes Center Odense (SDCO), Odense, Denmark
| | - Lars Peter Schødt Riber
- Department of Clinical Research, University of Southern Denmark, Odense, Denmark; Department of Cardiac, Thoracic and Vascular Surgery, Odense University Hospital, Odense, Denmark
| | - Lars Melholt Rasmussen
- Department of Clinical Biochemistry and Center for Individualised Medicine in Arterial Diseases (CIMA), Odense University Hospital, Odense, Denmark; Department of Clinical Research, University of Southern Denmark, Odense, Denmark
| | - Martin Overgaard
- Department of Clinical Biochemistry and Center for Individualised Medicine in Arterial Diseases (CIMA), Odense University Hospital, Odense, Denmark; Department of Clinical Research, University of Southern Denmark, Odense, Denmark.
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15
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Chalise U, Becirovic-Agic M, Rodriguez-Paar JR, Konfrst SR, de Morais SDB, Johnson CS, Flynn ER, Hall ME, Anderson DR, Cook LM, DeLeon-Pennell KY, Lindsey ML. Harnessing the Plasma Proteome to Mirror Current and Predict Future Cardiac Remodeling After Myocardial Infarction. J Cardiovasc Transl Res 2023; 16:3-16. [PMID: 36197585 PMCID: PMC9944212 DOI: 10.1007/s12265-022-10326-w] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Accepted: 09/15/2022] [Indexed: 12/01/2022]
Abstract
To identify plasma proteins that mirror current and predict future remodeling after myocardial infarction (MI), we retrospectively interrogated plasma proteomes of day (D)0 control (n = 16) and D3 MI (n = 15) from C57BL/6 J mice (20 ± 1 months). A total of 165 unique proteins were correlated with cardiac physiology variables. We prospectively tested the hypothesis that candidates identified retrospectively would predict cardiac physiology at an extended timepoint (D7 MI) in a second cohort of mice (n = 4 ± 1 months). We also examined human plasma from healthy controls (n = 18) and patients 48 h after presentation for MI (n = 41). Retrospectively, we identified 5 strong reflectors of remodeling (all r ≥ 0.60 and p < 0.05). Prospectively, ApoA1, IgA, IL-17E, and TIMP-1 mirrored current and predicted future remodeling. In humans, cytokine-cytokine receptor signaling was the top enriched KEGG pathway for all candidates. In summary, we identified plasma proteins that serve as useful prognostic indicators of adverse remodeling and progression to heart failure.
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Affiliation(s)
- Upendra Chalise
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, NE, 68198, USA
- Research Service, Nebraska-Western Iowa Health Care System, Omaha, NE, 68198, USA
| | - Mediha Becirovic-Agic
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, NE, 68198, USA
- Research Service, Nebraska-Western Iowa Health Care System, Omaha, NE, 68198, USA
| | - Jocelyn R Rodriguez-Paar
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, NE, 68198, USA
- Research Service, Nebraska-Western Iowa Health Care System, Omaha, NE, 68198, USA
| | - Shelby R Konfrst
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, NE, 68198, USA
- Research Service, Nebraska-Western Iowa Health Care System, Omaha, NE, 68198, USA
| | - Sharon D B de Morais
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, NE, 68198, USA
- Research Service, Nebraska-Western Iowa Health Care System, Omaha, NE, 68198, USA
| | - Catherine S Johnson
- Eppley Institute for Research in Cancer and Allied Diseases, University of Nebraska Medical Center, Omaha, Nebraska, 68198, USA
| | - Elizabeth R Flynn
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | - Michael E Hall
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | - Daniel R Anderson
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Leah M Cook
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE, 68198, USA
| | - Kristine Y DeLeon-Pennell
- Department of Medicine, Division of Cardiology, Medical University of South Carolina, Charleston, SC, 29425, USA
- Research Service, Ralph H. Johnson Veterans Affairs Medical Center, Charleston, SC, 29401, USA
| | - Merry L Lindsey
- School of Graduate Studies and Research, Meharry Medical College, 1005 Dr DB Todd Jr Blvd, Nashville, TN, 37208, USA.
- Nashville VA Medical Center, Nashville, TN, 37212, USA.
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16
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Wingard MC, Dalal S, Shook PL, Ramirez P, Raza MU, Johnson P, Connelly BA, Thewke D, Singh M, Singh K. Deficiency of ataxia-telangiectasia mutated kinase attenuates Western-type diet-induced cardiac dysfunction in female mice. Physiol Rep 2022; 10:e15434. [PMID: 36117462 PMCID: PMC9483716 DOI: 10.14814/phy2.15434] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 07/29/2022] [Accepted: 08/05/2022] [Indexed: 11/24/2022] Open
Abstract
Chronic consumption of Western-type diet (WD) induces cardiac structural and functional abnormalities. Previously, we have shown that WD consumption in male ATM (ataxia-telangiectasia mutated kinase) deficient mice associates with accelerated body weight (BW) gain, cardiac systolic dysfunction with increased preload, and exacerbation of hypertrophy, apoptosis, and inflammation. This study investigated the role of ATM deficiency in WD-induced changes in functional and biochemical parameters of the heart in female mice. Six-week-old wild-type (WT) and ATM heterozygous knockout (hKO) female mice were placed on WD or NC (normal chow) for 14 weeks. BW gain, fat accumulation, and cardiac functional and biochemical parameters were measured 14 weeks post-WD. WD-induced subcutaneous and total fat contents normalized to body weight were higher in WT-WD versus hKO-WD. Heart function measured using echocardiography revealed decreased percent fractional shortening and ejection fraction, and increased LV end systolic diameter and volume in WT-WD versus WT-NC. These functional parameters remained unchanged in hKO-WD versus hKO-NC. Myocardial fibrosis, myocyte hypertrophy, and apoptosis were higher in WT-WD versus WT-NC. However, apoptosis was significantly lower and hypertrophy was significantly higher in hKO-WD versus WT-WD. MMP-9 and Bax expression, and Akt activation were higher in WT-WD versus WT-NC. PARP-1 (full-length) expression and mTOR activation were lower in WT-WD versus hKO-WD. Thus, ATM deficiency in female mice attenuates fat weight gain, preserves heart function, and associates with decreased cardiac cell apoptosis in response to WD.
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Affiliation(s)
- Mary C. Wingard
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
| | - Suman Dalal
- Department of Health SciencesEast Tennessee State UniversityJohnson CityTennesseeUSA
- Center of Excellence in Inflammation, Infectious Disease and ImmunityJohnson CityTennesseeUSA
| | - Paige L. Shook
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
| | - Paulina Ramirez
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
| | - Muhammad U. Raza
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
| | - Patrick Johnson
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
| | - Barbara A. Connelly
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
- Research and Development ServiceJames H Quillen Veterans Affairs Medical CenterMountain HomeTennesseeUSA
| | - Douglas P. Thewke
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
| | - Mahipal Singh
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
| | - Krishna Singh
- Department of Biomedical SciencesJames H Quillen College of Medicine, East Tennessee State UniversityJohnson CityTennesseeUSA
- Center of Excellence in Inflammation, Infectious Disease and ImmunityJohnson CityTennesseeUSA
- Research and Development ServiceJames H Quillen Veterans Affairs Medical CenterMountain HomeTennesseeUSA
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17
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Sonobe T, Tsuchimochi H, Maeda H, Pearson JT. Increased contribution of KCa channels to muscle contraction induced vascular and blood flow responses in sedentary and exercise trained ZFDM rats. J Physiol 2022; 600:2919-2938. [PMID: 35551673 DOI: 10.1113/jp282981] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2022] [Accepted: 05/04/2022] [Indexed: 11/08/2022] Open
Abstract
KEY POINTS Microvascular dysfunction in type 2 diabetes impairs blood flow redistribution during exercise and limits the performance of skeletal muscle and may cause early fatigability. Endothelium-dependent hyperpolarization (EDH), which mediates vasodilation in resistance arteries is known to be depressed in animals with diabetes. Here we report that low-intensity exercise training in ZFDM rats increased KCa channel-derived component in the vasodilator responses to muscle contraction than in sedentary rats, partly due to the increase in KCNN3 expression. These results suggest that low-intensity exercise training improves blood flow redistribution in contracting skeletal muscle in metabolic disease with diabetes via upregulation of EDH. ABSTRACT In resistance arteries, endothelium-dependent hyperpolarization (EDH) mediated vasodilation is depressed in diabetes. We hypothesized that downregulation of KCa channel derived EDH reduces exercise-induced vasodilation and blood flow redistribution in diabetes. To test this hypothesis, we evaluated vascular function in response to hindlimb muscle contraction, and the contribution of KCa channels in anaesthetised ZFDM, metabolic disease rats with type 2 diabetes. We also tested whether exercise training ameliorated the vascular response. Using in vivo microangiography, the hindlimb vasculature was visualized before and after rhythmic muscle contraction (0.5 s tetanus every 3 sec, 20 times) evoked by sciatic nerve stimulation (40 Hz). Femoral blood flow of the contracting hindlimb was simultaneously measured by an ultrasonic flowmeter. The contribution of KCa channels was investigated in the presence and absence of apamin and charybdotoxin. We found that vascular and blood flow responses to muscle contraction were significantly impaired at the level of small artery segments in ZFDM fa/fa rats compared to its lean control fa/+ rats. The contribution of KCa channels was also smaller in fa/fa than in fa/+ rats. Low-intensity exercise training for 12 weeks in fa/fa rats demonstrated minor changes in the vascular and blood flow response to muscle contraction. However, KCa-derived component in the response to muscle contraction was much greater in exercise trained than in sedentary fa/fa rats. These data suggest that exercise training increases the contribution of KCa channels among endothelium-dependent vasodilatory mechanisms to maintain vascular and blood flow responses to muscle contraction in this metabolic disease rat model. Abstract figure legend Low-intensity exercise training in ZFDM, metabolic disease rats with type 2 diabetes increases KCa channel-derived component of endothelium-dependent hyperpolarization in the vascular and blood flow responses to skeletal muscle contraction than the responses in sedentary rats, partly due to upregulation of KCNN3 protein expression. This article is protected by copyright. All rights reserved.
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Affiliation(s)
- Takashi Sonobe
- Department of Cardiac Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - Hirotsugu Tsuchimochi
- Department of Cardiac Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - Hisashi Maeda
- Department of Cardiac Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan
| | - James T Pearson
- Department of Cardiac Physiology, National Cerebral and Cardiovascular Center Research Institute, Suita, Osaka, Japan.,Victoria Heart Institute and Monash Biomedicine Discovery Institute, Department of Physiology, Monash University, Melbourne, Australia
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18
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Sylvester MA, Pollow DP, Moffett C, Nunez W, Uhrlaub JL, Nikolich-Zugich J, Brooks HL. Splenocyte transfer from hypertensive donors eliminates premenopausal female protection from ANG II-induced hypertension. Am J Physiol Renal Physiol 2022; 322:F245-F257. [PMID: 35001661 PMCID: PMC8858666 DOI: 10.1152/ajprenal.00369.2021] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 12/15/2021] [Accepted: 01/04/2022] [Indexed: 11/22/2022] Open
Abstract
Premenopausal females are protected from angiotensin II (ANG II)-induced hypertension following the adoptive transfer of T cells from normotensive donors. For the present study, we hypothesized that the transfer of hypertensive T cells (HT) or splenocytes (HS) from hypertensive donors would eliminate premenopausal protection from hypertension. Premenopausal recombination-activating gene-1 (Rag-1)-/- females received either normotensive (NT) or hypertensive cells 3 wk before ANG II infusion (14 days, 490 ng/kg/min). Contrary to our hypothesis, no increase in ANG II-induced blood pressure was observed in the NT/ANG or HT/ANG groups. Flow cytometry demonstrated that renal FoxP3+ T regulatory cells were significantly decreased, and immunohistochemistry showed an increase in renal F4/80+ macrophages in the HT/ANG group, suggesting a shift in the renal inflammatory environment despite no change in blood pressure. Renal mRNA expression of macrophage chemoattractant protein-1 (MCP-1), endothelin-1 (ET-1), and G protein-coupled estrogen receptor-1 (GPER-1) was significantly decreased in the HT/ANG group. The adoptive transfer of hypertensive splenocytes before ANG II infusion (HS/ANG) eliminated premenopausal protection from hypertension and significantly decreased splenic FoxP3+ T regulatory cells compared with females that received normotensive splenocytes (NS/ANG). Expression of macrophage inflammatory protein 1α/chemokine (C-C motif) ligand 3 (MCP-1/CCL3), a potent macrophage chemokine, was elevated in the HS/ANG group; however, no increase in renal macrophage infiltration occurred. Together, these data show that in premenopausal females, T cells from hypertensive donors are not sufficient to induce robust ANG II-mediated hypertension; in contrast, transfer of hypertensive splenocytes (consisting of T/B lymphocytes, dendritic cells, and macrophages) is sufficient. Further work is needed to understand how innate and adaptive immune cells and estrogen signaling coordinate to cause differential hypertensive outcomes in premenopausal females.NEW & NOTEWORTHY Our study is the first to explore the role of hypertensive T cells versus hypertensive splenocytes in premenopausal protection from ANG II-induced hypertension. We show that the hypertensive status of T cell donors does not impact blood pressure in the recipient female. However, splenocytes, when transferred from hypertensive donors, significantly increased premenopausal recipient blood pressure following ANG II infusion, highlighting the importance of further investigation into estrogen signaling and immune cell activation in females.
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Affiliation(s)
| | - Dennis P Pollow
- Department of Physiology, University of Arizona, Tucson, Arizona
| | - Caitlin Moffett
- Department of Physiology, University of Arizona, Tucson, Arizona
| | - Wendy Nunez
- Department of Physiology, University of Arizona, Tucson, Arizona
| | - Jennifer L Uhrlaub
- Department of Immunobiology, University of Arizona, Tucson, Arizona
- University of Arizona Center on Aging, University of Arizona, Tucson, Arizona
| | - Janko Nikolich-Zugich
- Department of Immunobiology, University of Arizona, Tucson, Arizona
- University of Arizona Center on Aging, University of Arizona, Tucson, Arizona
| | - Heddwen L Brooks
- Department of Physiology, University of Arizona, Tucson, Arizona
- Sarver Heart Center, University of Arizona, Tucson, Arizona
- University of Arizona Center on Aging, University of Arizona, Tucson, Arizona
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19
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Chalise U, Becirovic-Agic M, Daseke MJ, Konfrst SR, Rodriguez-Paar JR, Feng D, Salomon JD, Anderson DR, Cook LM, Lindsey ML. S100A9 is a functional effector of infarct wall thinning after myocardial infarction. Am J Physiol Heart Circ Physiol 2022; 322:H145-H155. [PMID: 34890276 PMCID: PMC8742737 DOI: 10.1152/ajpheart.00475.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/26/2021] [Revised: 11/16/2021] [Accepted: 12/08/2021] [Indexed: 11/22/2022]
Abstract
Neutrophils infiltrate into the left ventricle (LV) early after myocardial infarction (MI) and launch a proinflammatory response. Along with neutrophil infiltration, LV wall thinning due to cardiomyocyte necrosis also peaks at day 1 in the mouse model of MI. To understand the correlation, we examined a previously published data set that included day 0 (n = 10) and MI day (D) 1 (n = 10) neutrophil proteome and echocardiography assessments. Out of 123 proteins, 4 proteins positively correlated with the infarct wall thinning index (1/wall thickness): histone 1.2 (r = 0.62, P = 0.004), S100A9 (r = 0.60, P = 0.005), histone 3.1 (r = 0.55, P = 0.01), and fibrinogen (r = 0.47, P = 0.04). As S100A9 was the highest ranked secreted protein, we hypothesized that S100A9 is a functional effector of infarct wall thinning. We exogenously administered S100A8/A9 at the time of MI to mice [C57BL/6J, male, 3-6 mo of age, n = 7 M (D1), and n = 5 M (D3)] and compared with saline vehicle control-treated mice [n = 6 M (D1) and n = 6 M (D3)] at MI days 1 and 3. At MI day 3, the S100A8/A9 group showed a 22% increase in the wall thinning index compared with saline (P = 0.02), along with higher dilation and lower ejection fraction. The decline in cardiac physiology occurred subsequent to increased neutrophil and macrophage infiltration at MI day 1 and increased macrophage infiltration at D3. Our results reveal that S100A9 is a functional effector of infarct wall thinning.NEW & NOTEWORTHY S100A9 is a functional marker of infarct wall thinning.
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Affiliation(s)
- Upendra Chalise
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, Nebraska
- Research Service, Nebraska-Western Iowa Health Care System, Omaha, Nebraska
| | - Mediha Becirovic-Agic
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, Nebraska
- Research Service, Nebraska-Western Iowa Health Care System, Omaha, Nebraska
| | - Michael J Daseke
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, Nebraska
- Research Service, Nebraska-Western Iowa Health Care System, Omaha, Nebraska
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi
| | - Shelby R Konfrst
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, Nebraska
- Research Service, Nebraska-Western Iowa Health Care System, Omaha, Nebraska
| | - Jocelyn R Rodriguez-Paar
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, Nebraska
| | - Dan Feng
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, Nebraska
- Division of Pediatric Critical Care, Department of Pediatrics, University of Nebraska Medical Center, Omaha, Nebraska
| | - Jeffrey D Salomon
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, Nebraska
- Division of Pediatric Critical Care, Department of Pediatrics, University of Nebraska Medical Center, Omaha, Nebraska
| | - Daniel R Anderson
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, Nebraska
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Nebraska Medical Center, Omaha, Nebraska
| | - Leah M Cook
- Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Merry L Lindsey
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, Nebraska
- Research Service, Nebraska-Western Iowa Health Care System, Omaha, Nebraska
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20
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Lindsey ML, Brunt KR, Kirk JA, Kleinbongard P, Calvert JW, de Castro Brás LE, DeLeon-Pennell KY, Del Re DP, Frangogiannis NG, Frantz S, Gumina RJ, Halade GV, Jones SP, Ritchie RH, Spinale FG, Thorp EB, Ripplinger CM, Kassiri Z. Guidelines for in vivo mouse models of myocardial infarction. Am J Physiol Heart Circ Physiol 2021; 321:H1056-H1073. [PMID: 34623181 PMCID: PMC8834230 DOI: 10.1152/ajpheart.00459.2021] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Revised: 10/05/2021] [Accepted: 10/05/2021] [Indexed: 12/11/2022]
Abstract
Despite significant improvements in reperfusion strategies, acute coronary syndromes all too often culminate in a myocardial infarction (MI). The consequent MI can, in turn, lead to remodeling of the left ventricle (LV), the development of LV dysfunction, and ultimately progression to heart failure (HF). Accordingly, an improved understanding of the underlying mechanisms of MI remodeling and progression to HF is necessary. One common approach to examine MI pathology is with murine models that recapitulate components of the clinical context of acute coronary syndrome and subsequent MI. We evaluated the different approaches used to produce MI in mouse models and identified opportunities to consolidate methods, recognizing that reperfused and nonreperfused MI yield different responses. The overall goal in compiling this consensus statement is to unify best practices regarding mouse MI models to improve interpretation and allow comparative examination across studies and laboratories. These guidelines will help to establish rigor and reproducibility and provide increased potential for clinical translation.
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Affiliation(s)
- Merry L Lindsey
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, Nebraska
- Research Service, Nebraska-Western Iowa Health Care System, Omaha, Nebraska
| | - Keith R Brunt
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Saint John, New Brunswick, Canada
| | - Jonathan A Kirk
- Department of Cell and Molecular Physiology, Loyola University Chicago Stritch School of Medicine, Chicago, Illinois
| | - Petra Kleinbongard
- Institute for Pathophysiology, West German Heart and Vascular Center, University of Essen Medical School, Essen, Germany
| | - John W Calvert
- Carlyle Fraser Heart Center of Emory University Hospital Midtown, Atlanta, Georgia
- Division of Cardiothoracic Surgery, Department of Surgery, Emory University School of Medicine, Atlanta, Georgia
| | - Lisandra E de Castro Brás
- Department of Physiology, The Brody School of Medicine, East Carolina University, Greenville, North Carolina
| | - Kristine Y DeLeon-Pennell
- Division of Cardiology, Department of Medicine, Medical University of South Carolina, Charleston, South Carolina
- Research Service, Ralph H. Johnson Veterans Affairs Medical Center, Charleston, South Carolina
| | - Dominic P Del Re
- Department of Cell Biology and Molecular Medicine, Cardiovascular Research Institute, Rutgers New Jersey Medical School, Newark, New Jersey
| | - Nikolaos G Frangogiannis
- Division of Cardiology, Department of Medicine, The Wilf Family Cardiovascular Research Institute, Albert Einstein College of Medicine, Bronx, New York
| | - Stefan Frantz
- Department of Internal Medicine I, University Hospital Würzburg, Würzburg, Germany
| | - Richard J Gumina
- Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio
- Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, Ohio
- The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Ganesh V Halade
- Division of Cardiovascular Sciences, Department of Medicine, University of South Florida, Tampa, Florida
| | - Steven P Jones
- Department of Medicine, Diabetes and Obesity Center, University of Louisville, Louisville, Kentucky
| | - Rebecca H Ritchie
- Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University (Parkville Campus), Victoria, Australia
| | - Francis G Spinale
- Cardiovascular Translational Research Center, University of South Carolina School of Medicine and the Columbia Veteran Affairs Medical Center, Columbia, South Carolina
| | - Edward B Thorp
- Department of Pathology and Feinberg Cardiovascular and Renal Research Institute, Feinberg School of Medicine, Northwestern University, Chicago, Illinois
| | - Crystal M Ripplinger
- Department of Pharmacology, University of California Davis School of Medicine, Davis, California
| | - Zamaneh Kassiri
- Department of Physiology, Cardiovascular Research Center, University of Alberta, Edmonton, Alberta, Canada
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21
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Lindsey ML, LeBlanc AJ, Ripplinger CM, Carter JR, Kirk JA, Hansell Keehan K, Brunt KR, Kleinbongard P, Kassiri Z. Reinforcing rigor and reproducibility expectations for use of sex and gender in cardiovascular research. Am J Physiol Heart Circ Physiol 2021; 321:H819-H824. [PMID: 34524922 DOI: 10.1152/ajpheart.00418.2021] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Merry L Lindsey
- Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, Nebraska.,Research Service, Nebraska-Western Iowa Health Care System, Omaha, Nebraska
| | - Amanda J LeBlanc
- Department of Physiology and Cardiovascular Innovation Institute, University of Louisville, Louisville, Kentucky
| | | | - Jason R Carter
- Department of Health and Human Development, Montana State University, Bozeman, Montana
| | - Jonathan A Kirk
- Department of Cell and Molecular Physiology, Loyola University Chicago Stritch School of Medicine, Chicago, Illinois
| | - Kara Hansell Keehan
- Strategic Journal Development, American Physiological Society, Rockville, Maryland.,AJP-Heart and Circulatory Physiology, American Physiological Society, Rockville, Maryland
| | - Keith R Brunt
- Department of Pharmacology, Faculty of Medicine, Dalhousie University, Saint John, New Brunswick, Canada
| | - Petra Kleinbongard
- Institute for Pathophysiology, West German Heart and Vascular Center, University of Essen Medical School, Essen, Germany
| | - Zamaneh Kassiri
- Department of Physiology, Cardiovascular Research Center, University of Alberta, Edmonton, Alberta, Canada
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22
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Lindsey ML, Kassiri Z, Hansell Keehan K, Brunt KR, Carter JR, Kirk JA, Kleinbongard P, LeBlanc AJ, Ripplinger CM. We are the change we seek. Am J Physiol Heart Circ Physiol 2021; 320:H1411-H1414. [PMID: 33710925 PMCID: PMC8260391 DOI: 10.1152/ajpheart.00090.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Merry L. Lindsey
- 1Department of Cellular and Integrative Physiology, Center for Heart and Vascular Research, University of Nebraska Medical Center, Omaha, Nebraska,2Research Service, Veterans Affairs Nebraska-Western Iowa Health Care System, Omaha, Nebraska
| | - Zamaneh Kassiri
- 3Department of Physiology, Cardiovascular Research Center, University of Alberta, Edmonton, Alberta, Canada
| | - Kara Hansell Keehan
- 4American Journal of Physiology-Heart and Circulatory Physiology, American Physiological Society, Rockville, Maryland
| | - Keith R. Brunt
- 5Department of Pharmacology, Faculty of Medicine, Dalhousie University, Saint John, New Brunswick, Canada
| | - Jason R. Carter
- 6Department of Health and Human Development, Montana State University, Bozeman, Montana
| | - Jonathan A. Kirk
- 7Department of Cell and Molecular Physiology, Loyola University Chicago Stritch School of Medicine, Chicago, Illinois
| | - Petra Kleinbongard
- 8Institute for Pathophysiology, West German Heart and Vascular Center, University of Essen Medical School, Essen, Germany
| | - Amanda J. LeBlanc
- 9Department of Physiology and Cardiovascular Innovation Institute, University of Louisville, Louisville, Kentucky
| | - Crystal M. Ripplinger
- 10Department of Pharmacology, University of California Davis School of Medicine, Davis, California
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23
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Luo S, Zhang M, Wu H, Ding X, Li D, Dong X, Hu X, Su S, Shang W, Wu J, Xiao H, Yang W, Zhang Q, Zhang J, Lu Y, Pan Z. SAIL: a new conserved anti-fibrotic lncRNA in the heart. Basic Res Cardiol 2021; 116:15. [PMID: 33675440 DOI: 10.1007/s00395-021-00854-y] [Citation(s) in RCA: 26] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Accepted: 02/12/2021] [Indexed: 12/19/2022]
Abstract
Long non-coding RNAs (lncRNAs) account for a large proportion of genomic transcripts and are critical regulators in various cardiac diseases. Though lncRNAs have been reported to participate in the process of diverse cardiac diseases, the contribution of lncRNAs in cardiac fibrosis remains to be fully elucidated. Here, we identified a novel anti-fibrotic lncRNA, SAIL (scaffold attachment factor B interacting lncRNA). SAIL was reduced in cardiac fibrotic tissue and activated cardiac fibroblasts. Gain- and loss-of-function studies showed that knockdown of SAIL promoted proliferation and collagen production of cardiac fibroblasts with or without TGF-β1 (transforming growth factor beta1) treatment, while overexpression of SAIL did the opposite. In mouse cardiac fibrosis induced by myocardial infarction, knockdown of SAIL exacerbated, whereas overexpression of SAIL alleviated cardiac fibrosis. Mechanically, SAIL inhibited the fibrotic process by directly binding with SAFB via 23 conserved nucleotide sequences, which in turn blocked the access of SAFB to RNA pol II (RNA polymerase II) and reduced the transcription of fibrosis-related genes. Intriguingly, the human conserved fragment of SAIL (hSAIL) significantly suppressed the proliferation and collagen production of human cardiac fibroblasts. Our findings demonstrate that SAIL regulates cardiac fibrosis by regulating SAFB-mediated transcription of fibrotic related genes. Both SAIL and SAFB hold the potential to become novel therapeutic targets for cardiac fibrosis.
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Affiliation(s)
- Shenjian Luo
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Mingyu Zhang
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Hao Wu
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Xin Ding
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Danyang Li
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Xue Dong
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Xiaoxi Hu
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Shuang Su
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Wendi Shang
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Jiaxu Wu
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Hongwen Xiao
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Wanqi Yang
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Qi Zhang
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Jifan Zhang
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Yanjie Lu
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
- Translational Medicine Research and Cooperation Center of Northern China, Heilongjiang Academy of Medical Sciences, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China
| | - Zhenwei Pan
- Department of Pharmacology, State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Medicine Research, Ministry of Education, College of Pharmacy, Harbin Medical University, Harbin, 150081, Heilongjiang, People's Republic of China.
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24
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Song J, Frieler RA, Whitesall SE, Chung Y, Vigil TM, Muir LA, Ma J, Brombacher F, Goonewardena SN, Lumeng CN, Goldstein DR, Mortensen RM. Myeloid interleukin-4 receptor α is essential in postmyocardial infarction healing by regulating inflammation and fibrotic remodeling. Am J Physiol Heart Circ Physiol 2021; 320:H323-H337. [PMID: 33164548 PMCID: PMC7847075 DOI: 10.1152/ajpheart.00251.2020] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 10/23/2020] [Accepted: 10/29/2020] [Indexed: 02/06/2023]
Abstract
Interleukin-4 receptor α (IL4Rα) signaling plays an important role in cardiac remodeling during myocardial infarction (MI). However, the target cell type(s) of IL4Rα signaling during this remodeling remains unclear. Here, we investigated the contribution of endogenous myeloid-specific IL4Rα signaling in cardiac remodeling post-MI. We established a murine myeloid-specific IL4Rα knockout (MyIL4RαKO) model with LysM promoter-driven Cre recombination. Macrophages from MyIL4RαKO mice showed significant downregulation of alternatively activated macrophage markers but an upregulation of classical activated macrophage markers both in vitro and in vivo, indicating the successful inactivation of IL4Rα signaling in macrophages. To examine the role of myeloid IL4Rα during MI, we subjected MyIL4RαKO and littermate floxed control (FC) mice to MI. We found that cardiac function was significantly impaired as a result of myeloid-specific IL4Rα deficiency. This deficiency resulted in a dysregulated inflammatory response consisting of decreased production of anti-inflammatory cytokines. Myeloid IL4Rα deficiency also led to reduced collagen 1 deposition and an imbalance of matrix metalloproteinases (MMPs)/tissue inhibitors of metalloproteinases (TIMPs), with upregulated MMPs and downregulated TIMPs, which resulted in insufficient fibrotic remodeling. In conclusion, this study identifies that myeloid-specific IL4Rα signaling regulates inflammation and fibrotic remodeling during MI. Therefore, myeloid-specific activation of IL4Rα signaling could offer protective benefits after MI.NEW & NOTEWORTHY This study showed, for the first time, the role of endogenous IL4Rα signaling in myeloid cells during cardiac remodeling and the underlying mechanisms. We identified myeloid cells are the critical target cell types of IL4Rα signaling during cardiac remodeling post-MI. Deficiency of myeloid IL4Rα signaling causes deteriorated cardiac function post-MI, due to dysregulated inflammation and insufficient fibrotic remodeling. This study sheds light on the potential of activating myeloid-specific IL4Rα signaling to modify remodeling post-MI. This brings hope to patients with MI and diminishes side effects by cell type-specific instead of whole body treatment.
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Affiliation(s)
- Jianrui Song
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan
- Department of Cell and Developmental Biology, University of Michigan, Ann Arbor, Michigan
| | - Ryan A Frieler
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan
| | - Steven E Whitesall
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan
| | - Yutein Chung
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan
| | - Thomas M Vigil
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan
| | - Lindsey A Muir
- Department of Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, Michigan
| | - Jun Ma
- Department of Thoracic Surgery, Shanxi Province People's Hospital, Taiyuan, People's Republic of China
| | - Frank Brombacher
- International Center for Genetic Engineering and Biotechnology, University of Cape Town, Cape Town, South Africa
| | - Sascha N Goonewardena
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
| | - Carey N Lumeng
- Department of Pediatrics and Communicable Diseases, University of Michigan, Ann Arbor, Michigan
| | - Daniel R Goldstein
- Division of Cardiovascular Medicine, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
- Institute of Gerontology, University of Michigan, Ann Arbor, Michigan
- Department of Microbiology and Immunology, University of Michigan, Ann Arbor, Michigan
| | - Richard M Mortensen
- Department of Molecular and Integrative Physiology, University of Michigan, Ann Arbor, Michigan
- Division of Metabolism, Endocrinology, and Diabetes, Department of Internal Medicine, University of Michigan, Ann Arbor, Michigan
- Department of Pharmacology, University of Michigan, Ann Arbor, Michigan
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25
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Wang R, Kumar B, Bhat-Nakshatri P, Prasad MS, Jacobsen MH, Ovalle G, Maguire C, Sandusky G, Trivedi T, Mohammad KS, Guise T, Penthala NR, Crooks PA, Liu J, Zimmers T, Nakshatri H. Aging-associated skeletal muscle defects in HER2/Neu transgenic mammary tumor model. JCSM RAPID COMMUNICATIONS 2021; 4:24-39. [PMID: 33842876 PMCID: PMC8028024 DOI: 10.1002/rco2.23] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
BACKGROUND Loss of skeletal muscle volume and resulting in functional limitations are poor prognostic markers in breast cancer patients. Several molecular defects in skeletal muscle including reduced MyoD levels and increased protein turn over due to enhanced proteosomal activity have been suggested as causes of skeletal muscle loss in cancer patients. However, it is unknown whether molecular defects in skeletal muscle are dependent on tumor etiology. METHODS We characterized functional and molecular defects of skeletal muscle in MMTV-Neu (Neu+) mice (n= 6-12), an animal model that represents HER2+ human breast cancer, and compared the results with well-characterized luminal B breast cancer model MMTV-PyMT (PyMT+). Functional studies such as grip strength, rotarod performance, and ex vivo muscle contraction were performed to measure the effects of cancer on skeletal muscle. Expression of muscle-enriched genes and microRNAs as well as circulating cytokines/chemokines were measured. Since NF-κB pathway plays a significant role in skeletal muscle defects, the ability of NF-κB inhibitor dimethylaminoparthenolide (DMAPT) to reverse skeletal muscle defects was examined. RESULTS Neu+ mice showed skeletal muscle defects similar to accelerated aging. Compared to age and sex-matched wild type mice, Neu+ tumor-bearing mice had lower grip strength (202±6.9 vs. 179±6.8 g grip force, p=0.0069) and impaired rotarod performance (108±12.1 vs. 30±3.9 seconds, P<0.0001), which was consistent with reduced muscle contractibility (p<0.0001). Skeletal muscle of Neu+ mice (n=6) contained lower levels of CD82+ (16.2±2.9 vs 9.0±1.6) and CD54+ (3.8±0.5 vs 2.4±0.4) muscle stem and progenitor cells (p<0.05), suggesting impaired capacity of muscle regeneration, which was accompanied by decreased MyoD, p53 and miR-486 expression in muscles (p<0.05). Unlike PyMT+ mice, which showed skeletal muscle mitochondrial defects including reduced mitochondria levels and Pgc1β, Neu+ mice displayed accelerated aging-associated changes including muscle fiber shrinkage and increased extracellular matrix deposition. Circulating "aging factor" and cachexia and fibromyalgia-associated chemokine Ccl11 was elevated in Neu+ mice (1439.56±514 vs. 1950±345 pg/ml, p<0.05). Treatment of Neu+ mice with DMAPT significantly restored grip strength (205±6 g force), rotarod performance (74±8.5 seconds), reversed molecular alterations associated with skeletal muscle aging, reduced circulating Ccl11 (1083.26 ±478 pg/ml), and improved animal survival. CONCLUSIONS These results suggest that breast cancer subtype has a specific impact on the type of molecular and structure changes in skeletal muscle, which needs to be taken into consideration while designing therapies to reduce breast cancer-induced skeletal muscle loss and functional limitations.
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Affiliation(s)
- Ruizhong Wang
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Brijesh Kumar
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | | | - Mayuri S Prasad
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Max H. Jacobsen
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Gabriela Ovalle
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Calli Maguire
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - George Sandusky
- Department of Pathology and Laboratory Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Trupti Trivedi
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Khalid S Mohammad
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Theresa Guise
- Department of Medicine, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Narsimha R Penthala
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Peter A Crooks
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Arkansas for Medical Sciences, Little Rock, AR 72205, USA
| | - Jianguo Liu
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
| | - Teresa Zimmers
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Richard L Roudebush VA Medical Center, Indianapolis, IN 46202, USA
| | - Harikrishna Nakshatri
- Department of Surgery, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Department of Biochemistry and Molecular Biology, Indiana University School of Medicine, Indianapolis, IN 46202, USA
- Richard L Roudebush VA Medical Center, Indianapolis, IN 46202, USA
- Corresponding Author: Harikrishna Nakshatri, BVSc., PhD, C218C, 980 West Walnut St., Indianapolis, IN 46202, USA, 317 278 2238,
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26
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Gao L, Kumar V, Vellichirammal NN, Park SY, Rudebush TL, Yu L, Son WM, Pekas EJ, Wafi AM, Hong J, Xiao P, Guda C, Wang HJ, Schultz HD, Zucker IH. Functional, proteomic and bioinformatic analyses of Nrf2- and Keap1- null skeletal muscle. J Physiol 2020; 598:5427-5451. [PMID: 32893883 PMCID: PMC7749628 DOI: 10.1113/jp280176] [Citation(s) in RCA: 32] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2020] [Accepted: 09/02/2020] [Indexed: 12/17/2022] Open
Abstract
KEY POINTS Nrf2 is a master regulator of endogenous cellular defences, governing the expression of more than 200 cytoprotective proteins, including a panel of antioxidant enzymes. Nrf2 plays an important role in redox haemostasis of skeletal muscle in response to the increased generation of reactive oxygen species during contraction. Employing skeletal muscle-specific transgenic mouse models with unbiased-omic approaches, we uncovered new target proteins, downstream pathways and molecular networks of Nrf2 in skeletal muscle following Nrf2 or Keap1 deletion. Based on the findings, we proposed a two-way model to understand Nrf2 function: a tonic effect through a Keap1-independent mechanism under basal conditions and an induced effect through a Keap1-dependent mechanism in response to oxidative and other stresses. ABSTRACT Although Nrf2 has been recognized as a master regulator of cytoprotection, its functional significance remains to be completely defined. We hypothesized that proteomic/bioinformatic analyses from Nrf2-deficient or overexpressed skeletal muscle tissues will provide a broader spectrum of Nrf2 targets and downstream pathways than are currently known. To this end, we created two transgenic mouse models; the iMS-Nrf2flox/flox and iMS-Keap1flox/flox , employing which we demonstrated that selective deletion of skeletal muscle Nrf2 or Keap1 separately impaired or improved skeletal muscle function. Mass spectrometry revealed that Nrf2-KO changed expression of 114 proteins while Keap1-KO changed expression of 117 proteins with 10 proteins in common between the groups. Gene ontology analysis suggested that Nrf2 KO-changed proteins are involved in metabolism of oxidoreduction coenzymes, purine ribonucleoside triphosphate, ATP and propanoate, which are considered as the basal function of Nrf2, while Keap1 KO-changed proteins are involved in cellular detoxification, NADP metabolism, glutathione metabolism and the electron transport chain, which belong to the induced effect of Nrf2. Canonical pathway analysis suggested that Keap1-KO activated four pathways, whereas Nrf2-KO did not. Ingenuity pathway analysis further revealed that Nrf2-KO and Keap1-KO impacted different signal proteins and functions. Finally, we validated the proteomic and bioinformatics data by analysing glutathione metabolism and mitochondrial function. In conclusion, we found that Nrf2-targeted proteins are assigned to two groups: one mediates the tonic effects evoked by a low level of Nrf2 at basal condition; the other is responsible for the inducible effects evoked by a surge of Nrf2 that is dependent on a Keap1 mechanism.
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Affiliation(s)
- Lie Gao
- Department of Cellular & Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198
| | - Vikas Kumar
- Mass Spectrometry & Proteomics Core, University of Nebraska Medical Center, Omaha, NE 68198
| | | | - Song-Young Park
- School of Health and Kinesiology, University of Nebraska Omaha, Omaha, NE 68182
| | - Tara L. Rudebush
- Department of Cellular & Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198
| | - Li Yu
- Department of Cellular & Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198
| | - Won-Mok Son
- School of Health and Kinesiology, University of Nebraska Omaha, Omaha, NE 68182
| | - Elizabeth J. Pekas
- School of Health and Kinesiology, University of Nebraska Omaha, Omaha, NE 68182
| | - Ahmed M. Wafi
- Department of Cellular & Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198
| | - Juan Hong
- Department of Anesthesiology; University of Nebraska Medical Center, Omaha, NE 68198
| | - Peng Xiao
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE 68198
- Bioinformatics and Systems Biology Core, University of Nebraska Medical Center, Omaha, NE 68198
| | - Chittibabu Guda
- Department of Genetics, Cell Biology and Anatomy, University of Nebraska Medical Center, Omaha, NE 68198
- Bioinformatics and Systems Biology Core, University of Nebraska Medical Center, Omaha, NE 68198
| | - Han-Jun Wang
- Department of Anesthesiology; University of Nebraska Medical Center, Omaha, NE 68198
| | - Harold D. Schultz
- Department of Cellular & Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198
| | - Irving H. Zucker
- Department of Cellular & Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198
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Correia-Sá IB, Carvalho CM, Serrão PV, Machado VA, Carvalho SO, Marques M, Vieira-Coelho MA. AM251, a cannabinoid receptor 1 antagonist, prevents human fibroblasts differentiation and collagen deposition induced by TGF-β - An in vitro study. Eur J Pharmacol 2020; 892:173738. [PMID: 33220269 DOI: 10.1016/j.ejphar.2020.173738] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2020] [Revised: 11/01/2020] [Accepted: 11/04/2020] [Indexed: 10/22/2022]
Abstract
Previous studies showed that cannabinoid 1 receptor (CB1) is linked with skin fibrosis and scar tissue formation in mice. Therefore, the topical use of cannabinoids may have a role in the prevention or treatment of local fibrotic and wound healing diseases as hypertrophic scars or keloids. In this study, we asked whether CB1 activation or inactivation would change fibroblast differentiation into myofibroblast and collagen deposition in skin human fibroblast. Primary cultures of adult human fibroblasts were obtained from abdominal human skin. Cells were stimulated with transforming growth factor-beta (TGF-β, 10ng/ml) and treated with a CB1 selective agonist (arachidonyl-2-chloroethylamide, ACEA 1 μM) and an antagonist (AM251 1, 5 and 10 μM). Alpha-smooth muscle actin (α-SMA) was quantified using Immunocytochemistry and Western Blot. Collagen was quantified with Sirius Red staining assay. Significance was assessed by One-way ANOVA. P < 0.05 was considered significant. TGF-β significantly increases α-SMA expression. ACEA 1 μM significantly increases collagen deposition but does not change α-SMA expression. AM251 10 μM added in the absence and the presence of ACEA reduces α-SMA expression and collagen content in TGF-β treated cells. AM251 shows a concentration-dependent effect over collagen deposition with a pIC50 of 5.5 (4.6-6.4). TGF-β significantly increases CB1 receptor expression. CB1 inactivation with AM251 prevents fibroblasts differentiation and collagen deposition, induced by TGF-β in human fibroblasts. The outcome supports that CB1 is a molecular target for wound healing disorders and in vivo and pre-clinical studies should be implemented to clarify this premise.
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Affiliation(s)
- Inês B Correia-Sá
- Department of Plastic, Reconstructive and Aesthetic Surgery and Burn Unit, Faculty of Medicine, University of Porto and Centro Hospitalar São João, EPE, Porto, Portugal; Department of Biomedicine - Pharmacology and Therapeutics Unit, Faculty of Medicine, University of Oporto, Porto, Portugal.
| | - Cláudia M Carvalho
- Department of Biomedicine - Pharmacology and Therapeutics Unit, Faculty of Medicine, University of Oporto, Porto, Portugal
| | - Paula V Serrão
- Department of Biomedicine - Pharmacology and Therapeutics Unit, Faculty of Medicine, University of Oporto, Porto, Portugal
| | - Vera A Machado
- Department of Biomedicine - Pharmacology and Therapeutics Unit, Faculty of Medicine, University of Oporto, Porto, Portugal
| | - Sofia O Carvalho
- Department of Biomedicine - Pharmacology and Therapeutics Unit, Faculty of Medicine, University of Oporto, Porto, Portugal
| | - Marisa Marques
- Department of Plastic, Reconstructive and Aesthetic Surgery and Burn Unit, Faculty of Medicine, University of Porto and Centro Hospitalar São João, EPE, Porto, Portugal
| | - Maria A Vieira-Coelho
- Department of Biomedicine - Pharmacology and Therapeutics Unit, Faculty of Medicine, University of Oporto, Porto, Portugal
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28
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Bates ML, Gundry RL, Lindsey ML. Using an Investigative Journalism Approach to Design Mechanistic Experiments in Physiology. Physiology (Bethesda) 2020; 35:218-219. [PMID: 32490747 DOI: 10.1152/physiol.00006.2020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Affiliation(s)
| | | | - Merry L Lindsey
- University of Nebraska Medical Center, Omaha, Nebraska.,Nebraska-Western Iowa Health Care System, Omaha, Nebraska
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29
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Chinn GA, Pearn ML, Vutskits L, Mintz CD, Loepke AW, Lee JJ, Chen J, Bosnjak ZJ, Brambrink AM, Jevtovic-Todorovic V, Sun LS, Sall JW. Standards for preclinical research and publications in developmental anaesthetic neurotoxicity: expert opinion statement from the SmartTots preclinical working group. Br J Anaesth 2020; 124:585-593. [PMID: 32145876 PMCID: PMC7424895 DOI: 10.1016/j.bja.2020.01.011] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2019] [Revised: 01/06/2020] [Accepted: 01/24/2020] [Indexed: 12/16/2022] Open
Abstract
In March 2019, SmartTots, a public-private partnership between the US Food and Drug Administration and the International Anesthesia Research Society, hosted a meeting attended by research experts, anaesthesia journal editors, and government agency representatives to discuss the continued need for rigorous preclinical research and the importance of establishing reporting standards for the field of anaesthetic perinatal neurotoxicity. This group affirmed the importance of preclinical research in the field, and welcomed novel and mechanistic approaches to answer some of the field's largest questions. The attendees concluded that summarising the benefits and disadvantages of specific model systems, and providing guidance for reporting results, would be helpful for designing new experiments and interpreting results across laboratories. This expert opinion report is a summary of these discussions, and includes a focused review of current animal models and reporting standards for the field of perinatal anaesthetic neurotoxicity. This will serve as a practical guide and road map for novel and rigorous experimental work.
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Affiliation(s)
- Gregory A Chinn
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, CA, USA
| | - Matthew L Pearn
- Department of Anesthesiology, University of California, San Diego, CA, USA
| | - Laszlo Vutskits
- Department of Anesthesiology, Clinical Pharmacology, Intensive Care and Emergency Medicine, University Hospitals of Geneva, Geneva, Switzerland
| | - Cyrus D Mintz
- Department of Anesthesiology and Critical Care Medicine, The Johns Hopkins University School of Medicine, Baltimore, MD, USA
| | - Andreas W Loepke
- Department of Anesthesiology and Critical Care Medicine, The Children's Hospital of Philadelphia, Philadelphia, PA, USA
| | - Jennifer J Lee
- Department of Anesthesiology, Columbia University, New York, NY, USA
| | - Jerri Chen
- Department of Anesthesiology, Columbia University, New York, NY, USA
| | - Zeljko J Bosnjak
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, USA
| | | | | | - Lena S Sun
- Department of Anesthesiology, Columbia University, New York, NY, USA
| | - Jeffrey W Sall
- Department of Anesthesia and Perioperative Care, University of California, San Francisco, CA, USA.
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30
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Keehan KH, Gaffney MC, Zucker IH. CORP: Assessing author compliance with data presentation guidelines for manuscript figures. Am J Physiol Heart Circ Physiol 2020; 318:H1051-H1058. [PMID: 32196356 DOI: 10.1152/ajpheart.00071.2020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The present study was undertaken to address the concern that author compliance with American Physiological Society (APS) journal instructions to authors for data presentation in manuscript figures is inadequate. Common instances of noncompliance are omitted molecular weight markers for immunoblots and bar graphs lacking individual data points. The American Journal of Physiology-Heart and Circulatory Physiology (AJP-Heart and Circ) editorial team designed a program to assess figure data presentation in submitted manuscripts. The intended outcome was to improve author compliance with APS data presentation guidelines and to improve overall rigor and reproducibility in articles published in AJP-Heart and Circ. The AJP-Heart and Circ team invited 37 peer reviewers to participate in a figure reviewer project (FRp). Over a period of five months, 32 first-revision manuscripts were enrolled in the FRp. Each manuscript was reviewed by the original peer reviewers and an additional figure reviewer (FR). Post-peer review, corresponding authors and FRs were surveyed for insight into their experiences. Of the 32 corresponding authors invited, 20 (63%) responded to the survey. In response to the survey, 100% of respondents stated that peer review was performed in a timely fashion despite the additional FR. When asked whether the FR experience had any effect on how one would present data in manuscript figures in future submissions, 65% of authors and 83% of FRs said yes. In addition, 63% of authors responding agreed that the overall quality of their figures was improved after revising based on FR comments. This exercise resulted in improved compliance with APS data presentation guidelines and changed attitudes among both authors and reviewers as to the need for consistent and clear data presentation in manuscript figures.NEW & NOTEWORTHY The goal of the American Journal of Physiology-Heart and Circulatory Physiology figure reviewer program was to improve author compliance with existing APS data presentation instructions for manuscript figures. The result was an improvement in compliance with these guidelines. Time from submission to final decision did not significantly increase for papers with the additional figure reviewer, and both figure reviewers and corresponding authors reported positive feedback in post-program surveys.
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Affiliation(s)
- Kara Hansell Keehan
- American Journal of Physiology-Heart and Circulatory Physiology, American Physiological Society, Rockville, Maryland
| | - Michelle C Gaffney
- American Journal of Physiology-Heart and Circulatory Physiology, American Physiological Society, Rockville, Maryland
| | - Irving H Zucker
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, Nebraska
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31
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Locatelli P, Belaich MN, López AE, Olea FD, Uranga Vega M, Giménez CS, Simonin JA, Bauzá MDR, Castillo MG, Cuniberti LA, Crottogini A, Cerrudo CS, Ghiringhelli PD. Novel insights into cardiac regeneration based on differential fetal and adult ovine heart transcriptomic analysis. Am J Physiol Heart Circ Physiol 2020; 318:H994-H1007. [PMID: 32167779 DOI: 10.1152/ajpheart.00610.2019] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The adult mammalian cardiomyocyte has a very limited capacity to reenter the cell cycle and advance into mitosis. Therefore, diseases characterized by lost contractile tissue usually evolve into myocardial remodeling and heart failure. Analyzing the cardiac transcriptome at different developmental stages in a large mammal closer to the human than laboratory rodents may serve to disclose positive and negative cardiomyocyte cell cycle regulators potentially targetable to induce cardiac regeneration in the clinical setting. Thus we aimed at characterizing the transcriptomic profiles of the early fetal, late fetal, and adult sheep heart by employing RNA-seq technique and bioinformatic analysis to detect protein-encoding genes that in some of the stages were turned off, turned on, or differentially expressed. Genes earlier proposed as positive cell cycle regulators such as cyclin A, cdk2, meis2, meis3, and PCNA showed higher expression in fetal hearts and lower in AH, as expected. In contrast, genes previously proposed as cell cycle inhibitors, such as meis1, p16, and sav1, tended to be higher in fetal than in adult hearts, suggesting that these genes are involved in cell processes other than cell cycle regulation. Additionally, we described Gene Ontology (GO) enrichment of different sets of genes. GO analysis revealed that differentially expressed gene sets were mainly associated with metabolic and cellular processes. The cell cycle-related genes fam64a, cdc20, and cdk1, and the metabolism-related genes pitx and adipoq showed strong differential expression between fetal and adult hearts, thus being potent candidates to be targeted in human cardiac regeneration strategies.NEW & NOTEWORTHY We characterized the transcriptomic profiles of the fetal and adult sheep hearts employing RNAseq technique and bioinformatic analyses to provide sets of transcripts whose variation in expression level may link them to a specific role in cell cycle regulation. It is important to remark that this study was performed in a large mammal closer to humans than laboratory rodents. In consequence, the results can be used for further translational studies in cardiac regeneration.
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Affiliation(s)
- Paola Locatelli
- Instituto de Medicina Traslacional, Trasplante y Bioingeniería (IMETTYB), Universidad Favaloro-CONICET, Buenos Aires, Argentina
| | - Mariano N Belaich
- Laboratorio de Ingeniería Genética y Biología Celular y Molecular; CONICET, Instituto de Microbiología Básica y Aplicada, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Buenos Aires, Argentina
| | - Ayelén E López
- Instituto de Medicina Traslacional, Trasplante y Bioingeniería (IMETTYB), Universidad Favaloro-CONICET, Buenos Aires, Argentina
| | - Fernanda D Olea
- Instituto de Medicina Traslacional, Trasplante y Bioingeniería (IMETTYB), Universidad Favaloro-CONICET, Buenos Aires, Argentina
| | - Martín Uranga Vega
- Instituto de Medicina Traslacional, Trasplante y Bioingeniería (IMETTYB), Universidad Favaloro-CONICET, Buenos Aires, Argentina
| | - Carlos S Giménez
- Instituto de Medicina Traslacional, Trasplante y Bioingeniería (IMETTYB), Universidad Favaloro-CONICET, Buenos Aires, Argentina
| | - Jorge Alejandro Simonin
- Laboratorio de Ingeniería Genética y Biología Celular y Molecular; CONICET, Instituto de Microbiología Básica y Aplicada, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Buenos Aires, Argentina
| | - María Del Rosario Bauzá
- Instituto de Medicina Traslacional, Trasplante y Bioingeniería (IMETTYB), Universidad Favaloro-CONICET, Buenos Aires, Argentina
| | - Marta G Castillo
- Instituto de Medicina Traslacional, Trasplante y Bioingeniería (IMETTYB), Universidad Favaloro-CONICET, Buenos Aires, Argentina
| | - Luis A Cuniberti
- Instituto de Medicina Traslacional, Trasplante y Bioingeniería (IMETTYB), Universidad Favaloro-CONICET, Buenos Aires, Argentina
| | - Alberto Crottogini
- Instituto de Medicina Traslacional, Trasplante y Bioingeniería (IMETTYB), Universidad Favaloro-CONICET, Buenos Aires, Argentina
| | - Carolina S Cerrudo
- Laboratorio de Ingeniería Genética y Biología Celular y Molecular; CONICET, Instituto de Microbiología Básica y Aplicada, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Buenos Aires, Argentina
| | - Pablo D Ghiringhelli
- Laboratorio de Ingeniería Genética y Biología Celular y Molecular; CONICET, Instituto de Microbiología Básica y Aplicada, Departamento de Ciencia y Tecnología, Universidad Nacional de Quilmes, Buenos Aires, Argentina
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32
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Lindsey ML, Jung M, Yabluchanskiy A, Cannon PL, Iyer RP, Flynn ER, DeLeon-Pennell KY, Valerio FM, Harrison CL, Ripplinger CM, Hall ME, Ma Y. Exogenous CXCL4 infusion inhibits macrophage phagocytosis by limiting CD36 signalling to enhance post-myocardial infarction cardiac dilation and mortality. Cardiovasc Res 2020; 115:395-408. [PMID: 30169632 DOI: 10.1093/cvr/cvy211] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/21/2018] [Accepted: 08/27/2018] [Indexed: 12/20/2022] Open
Abstract
Aims Macrophage phagocytosis of dead cells is a prerequisite for inflammation resolution. Because CXCL4 induces macrophage phagocytosis in vitro, we examined the impact of exogenous CXCL4 infusion on cardiac wound healing and macrophage phagocytosis following myocardial infarction (MI). Methods and results CXCL4 expression significantly increased in the infarct region beginning at Day 3 post-MI, and macrophages were the predominant source. Adult male C57BL/6J mice were subjected to coronary artery occlusion, and MI mice were randomly infused with recombinant mouse CXCL4 or saline beginning at 24 h post-MI by mini-pump infusion. Compared with saline controls, CXCL4 infusion dramatically reduced 7 day post-MI survival [10% (3/30) for CXCL4 vs. 47% (7/15) for saline, P < 0.05] as a result of acute congestive heart failure. By echocardiography, CXCL4 significantly increased left ventricular (LV) volumes and dimensions at Day 5 post-MI (all P < 0.05), despite similar infarct areas compared with saline controls. While macrophage numbers were similar at Day 5 post-MI, CXCL4 infusion increased Ccr4 and Itgb4 and decreased Adamts8 gene levels in the infarct region, all of which linked to CXCL4-mediated cardiac dilation. Isolated Day 5 post-MI macrophages exhibited comparable levels of M1 and M4 markers between saline and CXCL4 groups. Interestingly, by both ex vivo and in vitro phagocytosis assays, CXCL4 reduced macrophage phagocytic capacity, which was connected to decreased levels of the phagocytosis receptor CD36. In vitro, a CD36 neutralizing antibody (CD36Ab) significantly inhibited macrophage phagocytic capacity. The combination of CXCL4 and CD36Ab did not have an additive effect, indicating that CXCL4 regulated phagocytosis through CD36 signalling. CXCL4 infusion significantly elevated infarct matrix metalloproteinase (MMP)-9 levels at Day 5 post-MI, and MMP-9 can cleave CD36 as a down-regulation mechanism. Conclusion CXCL4 infusion impaired macrophage phagocytic capacity by reducing CD36 levels through MMP-9 dependent and independent signalling, leading to higher mortality and LV dilation.
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Affiliation(s)
- Merry L Lindsey
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, USA.,Research Service, G.V. (Sonny) Montgomery Veterans Affairs Medical Center, Jackson, MS, USA
| | - Mira Jung
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, USA
| | - Andriy Yabluchanskiy
- Department of Geriatric Medicine, Translational Geroscience Laboratory, Reynolds Oklahoma Center on Aging, University of Oklahoma Health Sciences Center, Oklahoma City, OK, USA
| | - Presley L Cannon
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, USA
| | - Rugmani Padmanabhan Iyer
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, USA
| | - Elizabeth R Flynn
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, USA
| | - Kristine Y DeLeon-Pennell
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, USA.,Research Service, G.V. (Sonny) Montgomery Veterans Affairs Medical Center, Jackson, MS, USA
| | - Fritz M Valerio
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, USA
| | - Courtney L Harrison
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, USA
| | - Crystal M Ripplinger
- Department of Pharmacology, School of Medicine, University of California, Davis, Davis, CA, USA
| | - Michael E Hall
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, USA.,Department of Medicine, Division of Cardiology, University of Mississippi Medical Center, Jackson, MS, USA
| | - Yonggang Ma
- Department of Physiology and Biophysics, Mississippi Center for Heart Research, University of Mississippi Medical Center, 2500 North State St., Jackson, MS, USA
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33
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Kaminski AR, Moore ET, Daseke MJ, Valerio FM, Flynn ER, Lindsey ML. The compendium of matrix metalloproteinase expression in the left ventricle of mice following myocardial infarction. Am J Physiol Heart Circ Physiol 2020; 318:H706-H714. [PMID: 32083973 PMCID: PMC7099447 DOI: 10.1152/ajpheart.00679.2019] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/18/2019] [Revised: 02/04/2020] [Accepted: 02/14/2020] [Indexed: 12/13/2022]
Abstract
Matrix metalloproteinases (MMPs) are proteolytic enzymes that break down extracellular matrix (ECM) components and have shown to be highly active in the myocardial infarction (MI) landscape. In addition to breaking down ECM products, MMPs modulate cytokine signaling and mediate leukocyte cell physiology. MMP-2, -7, -8, -9, -12, -14, and -28 are well studied as effectors of cardiac remodeling after MI. Whereas 13 MMPs have been evaluated in the MI setting, 13 MMPs have not been investigated during cardiac remodeling. Here, we measure the remaining MMPs across the MI time continuum to provide the full catalog of MMP expression in the left ventricle after MI in mice. We found that MMP-10, -11, -16, -24, -25, and -27 increase after MI, whereas MMP-15, -17, -19, -21, -23b, and -26 did not change with MI. For the MMPs increased with MI, the macrophage was the predominant cell source. This work provides targets for investigation to understand the full complement of specific MMP roles in cardiac remodeling.NEW & NOTEWORTHY To date, a number of matrix metalloproteinases (MMPs) have not been evaluated in the left ventricle after myocardial infarction (MI). This article supplies the missing knowledge to provide a complete MI MMP compendium.
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Affiliation(s)
- Amanda R Kaminski
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi
| | - Edwin T Moore
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi
| | - Michael J Daseke
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi
- Center for Heart and Vascular Research, Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Fritz M Valerio
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi
| | - Elizabeth R Flynn
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi
| | - Merry L Lindsey
- Center for Heart and Vascular Research, Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, Nebraska
- Research Service, Nebraska-Western Iowa Health Care System, Omaha, Nebraska
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34
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Kar S, Shahshahan HR, Hackfort BT, Yadav SK, Yadav R, Kambis TN, Lefer DJ, Mishra PK. Exercise Training Promotes Cardiac Hydrogen Sulfide Biosynthesis and Mitigates Pyroptosis to Prevent High-Fat Diet-Induced Diabetic Cardiomyopathy. Antioxidants (Basel) 2019; 8:antiox8120638. [PMID: 31835893 PMCID: PMC6943713 DOI: 10.3390/antiox8120638] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2019] [Revised: 12/06/2019] [Accepted: 12/09/2019] [Indexed: 12/30/2022] Open
Abstract
Obesity increases the risk of developing diabetes and subsequently, diabetic cardiomyopathy (DMCM). Reduced cardioprotective antioxidant hydrogen sulfide (H2S) and increased inflammatory cell death via pyroptosis contribute to adverse cardiac remodeling and DMCM. Although exercise training (EX) has cardioprotective effects, it is unclear whether EX mitigates obesity-induced DMCM by increasing H₂S biosynthesis and mitigating pyroptosis in the heart. C57BL6 mice were fed a high-fat diet (HFD) while undergoing treadmill EX for 20 weeks. HFD mice developed obesity, hyperglycemia, and insulin resistance, which were reduced by EX. Left ventricle pressure-volume measurement revealed that obese mice developed reduced diastolic function with preserved ejection fraction, which was improved by EX. Cardiac dysfunction was accompanied by increased cardiac pyroptosis signaling, structural remodeling, and metabolic remodeling, indicated by accumulation of lipid droplets in the heart. Notably, EX increased cardiac H₂S concentration and expression of H₂S biosynthesis enzymes. HFD-induced obesity led to features of type 2 diabetes (T2DM), and subsequently DMCM. EX during the HFD regimen prevented the development of DMCM, possibly by promoting H₂S-mediated cardioprotection and alleviating pyroptosis. This is the first report of EX modulating H₂S and pyroptotic signaling in the heart.
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Affiliation(s)
- Sumit Kar
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (S.K.); (H.R.S.); (B.T.H.); (S.K.Y.); (R.Y.); (T.N.K.)
| | - Hamid R. Shahshahan
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (S.K.); (H.R.S.); (B.T.H.); (S.K.Y.); (R.Y.); (T.N.K.)
| | - Bryan T. Hackfort
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (S.K.); (H.R.S.); (B.T.H.); (S.K.Y.); (R.Y.); (T.N.K.)
| | - Santosh K. Yadav
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (S.K.); (H.R.S.); (B.T.H.); (S.K.Y.); (R.Y.); (T.N.K.)
| | - Roopali Yadav
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (S.K.); (H.R.S.); (B.T.H.); (S.K.Y.); (R.Y.); (T.N.K.)
| | - Tyler N. Kambis
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (S.K.); (H.R.S.); (B.T.H.); (S.K.Y.); (R.Y.); (T.N.K.)
| | - David J. Lefer
- Department of Pharmacology and Experimental Therapeutics, Cardiovascular Center of Excellence, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA;
| | - Paras K. Mishra
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198, USA; (S.K.); (H.R.S.); (B.T.H.); (S.K.Y.); (R.Y.); (T.N.K.)
- Correspondence: ; Tel.: +1-402-559-8524; Fax: +1-402-559-4438
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35
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Waas M, Gundry RL. A call to adopt a "fit for purpose" approach to antibody validation for flow cytometry analyses of stem cell models and beyond. Am J Physiol Heart Circ Physiol 2019; 317:H954-H957. [PMID: 31559827 DOI: 10.1152/ajpheart.00347.2019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Human pluripotent stem cell-derived cardiomyocytes (hPSC-CMs) can be exploited as models for a wide range of research applications and numerous protocols for generating hPSC-CMs have been described. However, it is currently not possible to direct differentiation to a single, homogeneous end point, and the resulting heterogeneity may be variable among laboratories, cell lines, and protocols. Consequently, the ability to assess phenotypic heterogeneity of the cell population is critical to the interpretation, repeatability, and reproduction of hPSC-CM studies. While flow cytometry is well suited for this purpose, a review of published literature reveals there is currently no consensus regarding which marker, antibody, or protocol is best suited to enable comparisons of hPSC-CM culture heterogeneity. Moreover, the lack of available experimental detail, combined with the variability in the approaches used for hPSC-CM evaluation, makes it challenging to reproduce, interpret, and compare published data. Consequently, this article calls for an alignment of the way researchers approach the routine use and documentation of the antibodies and controls used during flow cytometry-based assessment of hPSC-CM cultures. We advocate for the adoption of a "fit for purpose" validation mindset, whereby antibodies and experimental conditions are demonstrated as specific within a defined experimental design and biological context. Overall, we expect that by adhering to rigorous standards for antibody validation and use, reporting of experimental details, and presentation of data, the concepts emphasized here will promote enhanced utility and dialogue regarding hPSC-CM for a variety of research and translational applications by enabling more accurate comparisons of results among studies.
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Affiliation(s)
- Matthew Waas
- CardiOmics Program, Center for Heart and Vascular Research, Division of Cardiovascular Medicine, Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, Nebraska
| | - Rebekah L Gundry
- CardiOmics Program, Center for Heart and Vascular Research, Division of Cardiovascular Medicine, Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, Nebraska
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36
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Abstract
Matrix metalloproteinases (MMPs) and their endogenous inhibitors have been studied in the myocardium for the past 2 decades. An incomplete knowledge base and experimental design issues with inhibitors have hampered attempts at translation, but clinical interest remains high because of strong associations between MMPs and outcomes after myocardial infarction (MI) as well as mechanistic studies showing MMP involvement at multiple stages of the MI wound-healing process. This Review focuses on how our understanding of MMPs has evolved from a one-dimensional early focus on measuring MMP activity, monitoring MMP:inhibitor ratios, and evaluating one MMP-substrate pair to the current use of systems biology approaches to integrate the whole MMP repertoire of roles in the left ventricular response to MI. MMP9 is used as an example MMP to explain these concepts and to provide a template for examining MMPs as mechanistic mediators of cardiac remodelling.
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Affiliation(s)
- Merry L Lindsey
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS, USA. .,Research Service,, G.V. (Sonny) Montgomery Veterans Affairs Medical Center, Jackson, MS, USA.
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Daseke MJ, Valerio FM, Kalusche WJ, Ma Y, DeLeon-Pennell KY, Lindsey ML. Neutrophil proteome shifts over the myocardial infarction time continuum. Basic Res Cardiol 2019; 114:37. [PMID: 31418072 PMCID: PMC6695384 DOI: 10.1007/s00395-019-0746-x] [Citation(s) in RCA: 78] [Impact Index Per Article: 15.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 08/06/2019] [Indexed: 12/16/2022]
Abstract
In response to myocardial infarction (MI), neutrophils (PMNs) are early responders that initiate the inflammatory reaction. Because macrophages and fibroblasts show polarization states after MI, we hypothesized PMNs also undergo phenotypic changes over the MI time course. The objective of the current study was to map the continuum of polarization phenotypes in cardiac neutrophils over the first week of MI. C57BL/6J male mice (3–6 months old) underwent permanent coronary artery ligation to induce MI, and PMNs were isolated from the infarct region at days 1, 3, 5, and 7 after MI. Day 0 served as a no MI negative control. Aptamer proteomics was performed on biological replicates (n = 10–12) for each time point. Day (D)1 MI neutrophils had a high degranulation profile with increased matrix metalloproteinase (MMP) activity. D3 MI neutrophil profiles showed upregulation of apoptosis and induction of extracellular matrix (ECM) organization. D5 MI neutrophils further increased their ECM reorganization profile. D7 MI neutrophils had a reparative signature that included expression of fibronectin, galectin-3, and fibrinogen to contribute to scar formation by stimulating ECM reorganization. Of note, fibronectin was a key modulator of degranulation, as it amplified MMP-9 release in the presence of an inflammatory stimulus. Our results indicate that neutrophils selectively degranulate over the MI time course, reflective of both their intrinsic protein profiles as well as the ECM environment in which they reside. MMPs, cathepsins, and ECM proteins were prominent neutrophil degranulation indicators.
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Affiliation(s)
- Michael J Daseke
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | - Fritz M Valerio
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | - William J Kalusche
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS, 39216, USA
| | - Yonggang Ma
- Department of Molecular Pharmacology and Physiology, University of South Florida, Tampa, FL, 33612, USA
| | - Kristine Y DeLeon-Pennell
- Ralph H. Johnson Veterans Affairs Medical Center, Charleston, SC, USA.,Division of Cardiology, Department of Medicine, Medical University of South Carolina, Charleston, SC, 29425, USA
| | - Merry L Lindsey
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, 985850 Nebraska Medical Center, Omaha, NE, 68198-5850, USA. .,Research Service, Nebraska-Western Iowa Health Care System, Omaha, NE, USA.
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Covarrubias R, Ismahil MA, Rokosh G, Hamid T, Accornero F, Singh H, Gumina RJ, Prabhu SD, Bansal SS. Optimized protocols for isolation, fixation, and flow cytometric characterization of leukocytes in ischemic hearts. Am J Physiol Heart Circ Physiol 2019; 317:H658-H666. [PMID: 31373510 DOI: 10.1152/ajpheart.00137.2019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Immune activation post-myocardial infarction is an orchestrated sequence of cellular responses to effect tissue repair and healing. However, excessive and dysregulated inflammation can result in left ventricular remodeling and pathological alterations in the structural and mechanical attributes of the heart. Identification of key pathways and critical cellular mediators of inflammation is thus essential to design immunomodulatory therapies for myocardial infarction and ischemic heart failure. Despite this, the experimental approaches to isolate mononuclear cells from the heart are diverse, and detailed protocols to enable maximum yield of live cells in the shortest time possible are not readily available. Here, we describe optimized protocols for the isolation, fixation, and flow cytometric characterization of cardiac CD45+ leukocytes. These protocols circumvent time-consuming coronary perfusion and density-mediated cell-separation steps, resulting in high cellular yields from cardiac digests devoid of contaminating intravascular cells. Moreover, in contrast to methanol and acetone, we show that cell fixation using 1% paraformaldehyde is most optimal as it does not affect antibody binding or cellular morphology, thereby providing a considerable advantage to study activation/infiltration-associated changes in cellular granularity and size. These are highly versatile methods that can easily be streamlined for studies requiring simultaneous isolation of immune cells from different tissues or deployment in studies containing a large cohort of samples with time-sensitive constraints.NEW & NOTEWORTHY In this article, we describe optimized protocols for the isolation, fixation, and flow cytometric analysis of immune cells from the ischemic/nonischemic hearts. These protocols are optimized to process several samples/tissues, simultaneously enabling maximal yield of immune cells in the shortest time possible. We show that the low-speed centrifugation can be used as an effective alternative to lengthy coronary perfusion to remove intravascular cells, and sieving through 40-μm filter can replace density-mediated mononuclear cell separation which usually results in 50-70% cell loss in the sedimented pellets. We also show that cell fixation using 1% paraformaldehyde is better than the organic solvents such as methanol and acetone for flow cytometric analysis.
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Affiliation(s)
- Roman Covarrubias
- Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, Ohio.,The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio.,Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Mohamed Ameen Ismahil
- Division of Cardiovascular Disease and Comprehensive Cardiovascular Center, University of Alabama at Birmingham, Birmingham, Alabama
| | - Gregg Rokosh
- Division of Cardiovascular Disease and Comprehensive Cardiovascular Center, University of Alabama at Birmingham, Birmingham, Alabama
| | - Tariq Hamid
- Division of Cardiovascular Disease and Comprehensive Cardiovascular Center, University of Alabama at Birmingham, Birmingham, Alabama
| | - Federica Accornero
- Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, Ohio.,The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Harpreet Singh
- Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, Ohio.,The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Richard J Gumina
- Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, Ohio.,The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio.,Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio
| | - Sumanth D Prabhu
- Division of Cardiovascular Disease and Comprehensive Cardiovascular Center, University of Alabama at Birmingham, Birmingham, Alabama.,Medical Service, Birmingham Veterans Affairs Medical Center, Birmingham, Alabama
| | - Shyam S Bansal
- Department of Physiology and Cell Biology, The Ohio State University Wexner Medical Center, Columbus, Ohio.,The Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University Wexner Medical Center, Columbus, Ohio.,Division of Cardiovascular Medicine, Department of Internal Medicine, The Ohio State University Wexner Medical Center, Columbus, Ohio
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Weeks KL, Henstridge DC, Salim A, Shaw JE, Marwick TH, McMullen JR. CORP: Practical tools for improving experimental design and reporting of laboratory studies of cardiovascular physiology and metabolism. Am J Physiol Heart Circ Physiol 2019; 317:H627-H639. [PMID: 31347916 DOI: 10.1152/ajpheart.00327.2019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The exercise consisted of: 1) a short survey to acquire baseline data on current practices regarding the conduct of animal studies, 2) a series of presentations for promoting awareness and providing advice and practical tools for improving experimental design, and 3) a follow-up survey 12 mo later to assess whether practices had changed. The surveys were compulsory for responsible investigators (n = 16; paired data presented). Other investigators named on animal ethics applications were encouraged to participate (2017, total of 36 investigators; 2018, 37 investigators). The major findings to come from the exercise included 1) a willingness of investigators to make changes when provided with knowledge/tools and solutions that were relatively simple to implement (e.g., proportion of responsible investigators showing improved practices using a structured method for randomization was 0.44, 95% CI (0.19; 0.70), P = 0.003, and deidentifying drugs/interventions was 0.40, 95% CI (0.12; 0.68), P = 0.010); 2) resistance to change if this involved more personnel and time (e.g., as required for allocation concealment); and 3) evidence that changes to long-term practices ("habits") require time and follow-up. Improved practices could be verified based on changes in reporting within publications or documented evidence provided during laboratory visits. In summary, this exercise resulted in changed attitudes, practices, and reporting, but continued follow-up, monitoring, and incentives are required. Efforts to improve experimental rigor will reduce bias and will lead to findings with the greatest translational potential.NEW & NOTEWORTHY The goal of this exercise was to encourage preclinical researchers to improve the quality of their cardiac and metabolic animal studies by 1) increasing awareness of concerns, which can arise from suboptimal experimental designs; 2) providing knowledge, tools, and templates to overcome bias; and 3) conducting two short surveys over 12 mo to monitor change. Improved practices were identified for the uptake of structured methods for randomization, and de-identifying interventions/drugs.Listen to this article's corresponding podcast at https://ajpheart.podbean.com/e/experimental-design-survey-training-practical-tools/.
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Affiliation(s)
- Kate L Weeks
- Baker Heart and Diabetes Institute, Melbourne, Australia.,Department of Diabetes, Central Clinical School, Monash University, Clayton, Victoria, Australia
| | | | - Agus Salim
- Baker Heart and Diabetes Institute, Melbourne, Australia.,Department of Mathematics and Statistics, La Trobe University Victoria, Australia
| | | | | | - Julie R McMullen
- Baker Heart and Diabetes Institute, Melbourne, Australia.,Department of Diabetes, Central Clinical School, Monash University, Clayton, Victoria, Australia
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40
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Lindsey ML, Ma Y, Flynn ER, Winniford MD, Hall ME, DeLeon-Pennell KY. Identifying the molecular and cellular signature of cardiac dilation following myocardial infarction. Biochim Biophys Acta Mol Basis Dis 2019; 1865:1845-1852. [PMID: 31109452 PMCID: PMC6530589 DOI: 10.1016/j.bbadis.2018.09.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Revised: 09/04/2018] [Accepted: 09/17/2018] [Indexed: 11/17/2022]
Abstract
Establishing molecular and cellular indicators that reflect the extent of dilation of the left ventricle (LV) after myocardial infarction (MI) may improve diagnostic and prognostic capabilities. We queried the Mouse Heart Attack Research Tool (mHART) 1.0 for day 7 post-MI mice (age 3-9 months, untreated males and females) with serial echocardiographic data at days 0, 1, and 7 (n = 51). Mice were classified into two subgroups determined by a median fold change of 1.6 in end-diastolic dimensions (EDD) normalized to pre-MI values; n = 26 fell below (moderate; mean of 1.42 ± 0.01) and n = 25 fell above this cut-off (extreme; mean of 1.79 ± 0.01; p < 0.001 vs. moderate). Plasma proteomic profiling of 34 analytes measured at day 7 post-MI from male mice (n = 12 moderate and 12 extreme) were evaluated as the test dataset, and receiver operating curve (ROC) analysis was used to assess strength of biomarkers. Females (n = 6 moderate and 9 extreme) were used as the validation dataset. Both by t-test and characteristic (ROC) curve analysis, lower macrophage inflammatory protein-1 gamma (MIP-1γ), lymphotactin, and granulocyte chemotactic protein-2 (GCP-2) were identified as plasma indicators for dilation status (p < 0.05 for all). Macrophage numbers were decreased and complement C5, laminin 1, and Ccr8 gene levels were significantly higher in the LV infarcts of the extreme dilation group (p < 0.05 for all). A composite panel including plasma MIP-1γ, lymphotactin, and GCP-2, and LV infarct Ccr8 and macrophage numbers strongly mirrored LV dilation status (AUC = 0.92; p < 0.0001). Using the mHART 1.0 database, we determined that a failure to mount sufficient macrophage-mediated inflammation was indicative of exacerbated LV dilation.
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Affiliation(s)
- Merry L. Lindsey
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 N State St Jackson MS 39216
- Research Service, G.V. (Sonny) Montgomery Veterans Affairs Medical Center, 1500 E Woodrow Wilson Ave Jackson MS 39216
- Division of Cardiology, University of Mississippi Medical Center, 2500 N State St Jackson MS 39216
| | - Yonggang Ma
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 N State St Jackson MS 39216
| | - Elizabeth R. Flynn
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 N State St Jackson MS 39216
| | - Michael D. Winniford
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 N State St Jackson MS 39216
- Division of Cardiology, University of Mississippi Medical Center, 2500 N State St Jackson MS 39216
| | - Michael E. Hall
- Mississippi Center for Heart Research, Department of Physiology and Biophysics, University of Mississippi Medical Center, 2500 N State St Jackson MS 39216
- Division of Cardiology, University of Mississippi Medical Center, 2500 N State St Jackson MS 39216
| | - Kristine Y. DeLeon-Pennell
- Research Service, Ralph H. Johnson Veterans Affairs Medical Center, 109 Bee St, Charleston, SC 29401
- Division of Cardiology, Medical University of South Carolina, 30 Courtenay Dr Charleston SC 29425
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41
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Prows DR, Klingler A, Gibbons WJ, Homan SM, Zimmermann N. Characterization of a mouse model of hypereosinophilia-associated heart disease. Am J Physiol Heart Circ Physiol 2019; 317:H405-H414. [PMID: 31199184 DOI: 10.1152/ajpheart.00133.2019] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Hypereosinophilic syndrome is characterized by sustained and marked eosinophilia leading to tissue damage and organ dysfunction. Morbidity and mortality occur primarily due to cardiac and thromboembolic complications. Understanding the cause and mechanism of disease would aid in the development of targeted therapies with greater efficacy and fewer side effects. We discovered a spontaneous mouse mutant in our colony with a hypereosinophilic phenotype. Mice develop peripheral blood eosinophilia; infiltration of lungs, spleen, and heart by eosinophils; and extensive myocardial damage and remodeling. This ultimately leads to heart failure and premature death. Histopathological assessment of the hearts revealed a robust inflammatory infiltrate composed primarily of eosinophils and B-lymphocytes, associated with myocardial damage and replacement fibrosis, consistent with eosinophilic myocarditis. In many cases, hearts showed dilatation and thinning of the right ventricular wall, suggestive of an inflammatory dilated cardiomyopathy. Most mice showed atrial thrombi, which often filled the chamber. Protein expression analysis revealed overexpression of chemokines and cytokines involved in innate and adaptive immunity including IL-4, eotaxin, and RANTES. Disease could be transferred to wild-type mice by adoptive transfer of splenocytes from affected mice, suggesting a role for the immune system. In summary, the pathologies observed in the mutant lines are reminiscent of those seen in patients with hypereosinophilia, where cardiac-related morbidities, like congestive heart failure and thrombi, are the most common causes of death. As such, our model provides an opportunity to test mechanistic hypotheses and develop targeted therapies.NEW & NOTEWORTHY This article describes a new model of heart disease in hypereosinophilia. The model developed as a spontaneous mouse mutant in the colony and is characterized by peripheral blood eosinophilia and infiltration of lungs, spleen, and heart by eosinophils. In the heart, there is extensive myocardial damage, remodeling, fibrosis, and thrombosis, leading to heart failure and death. The immune microenvironment is one of increased innate and adaptive immunity, including Th1 and Th2 cytokines/chemokines. Finally, adoptive transfer of splenocytes transfers disease to recipient mice. In summary, this model provides an opportunity to test mechanistic hypotheses and develop targeted therapies for this rare but devastating disease.
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Affiliation(s)
- Daniel R Prows
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio.,Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio
| | - Andrea Klingler
- Division of Allergy and Immunology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - William J Gibbons
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Shelli M Homan
- Division of Human Genetics, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
| | - Nives Zimmermann
- Department of Pediatrics, University of Cincinnati College of Medicine, Cincinnati, Ohio.,Division of Allergy and Immunology, Cincinnati Children's Hospital Medical Center, Cincinnati, Ohio
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Ashraf S, Hegazy YK, Harmancey R. Nuclear receptor subfamily 4 group A member 2 inhibits activation of ERK signaling and cell growth in response to β-adrenergic stimulation in adult rat cardiomyocytes. Am J Physiol Cell Physiol 2019; 317:C513-C524. [PMID: 31188636 PMCID: PMC6766613 DOI: 10.1152/ajpcell.00526.2018] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
Abstract
Sustained elevation of sympathetic activity is an important contributor to pathological cardiac hypertrophy, ventricular arrhythmias, and left ventricular contractile dysfunction in chronic heart failure. The orphan nuclear receptor NR4A2 is an immediate early-response gene activated in the heart under β-adrenergic stimulation. The goal of this study was to identify the transcriptional remodeling events induced by increased NR4A2 expression in cardiomyocytes and their impact on the physiological response of those cells to sustained β-adrenergic stimulation. Treatment of adult rat ventricular myocytes with isoproterenol induced a rapid (<4 h) increase in NR4A2 levels that was accompanied by a transient (<24 h) increase in nuclear localization of the transcription factor. Adenovirus-mediated overexpression of NR4A2 to similar levels modulated the expression of genes linked to adrenoceptor signaling, calcium signaling, cell growth and proliferation and counteracted the increase in protein synthesis rate and cell surface area mediated by chronic isoproterenol stimulation. Consistent with those findings, NR4A2 overexpression also blocked the phosphorylative activation of growth-related kinases ERK1/2, Akt, and p70 S6 kinase. Prominent among the transcriptional changes induced by NR4A2 was the upregulation of the dual-specificity phosphatases DUSP2 and DUSP14, two known inhibitors of ERK1/2. Pretreatment of NR4A2-overexpressing cardiomyocytes with the DUSP inhibitor BCI [(E)-2-benzylidene-3-(cyclohexylamino)-2,3-dihydro-1H-inden-1-one] prevented the inhibition of ERK1/2 following isoproterenol stimulation. In conclusion, our results suggest that NR4A2 acts as a novel negative feedback regulator of the β-adrenergic receptor-mediated growth response in cardiomyocytes and this at least partly through DUSP-mediated inhibition of ERK1/2 signaling.
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Affiliation(s)
- Sadia Ashraf
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi.,Mississippi Center for Obesity Research, University of Mississippi Medical Center, Jackson, Mississippi.,Mississippi Center for Heart Research, University of Mississippi Medical Center, Jackson, Mississippi
| | - Yassmin K Hegazy
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi.,Mississippi Center for Obesity Research, University of Mississippi Medical Center, Jackson, Mississippi.,Mississippi Center for Heart Research, University of Mississippi Medical Center, Jackson, Mississippi
| | - Romain Harmancey
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi.,Mississippi Center for Obesity Research, University of Mississippi Medical Center, Jackson, Mississippi.,Mississippi Center for Heart Research, University of Mississippi Medical Center, Jackson, Mississippi
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43
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Raikwar N, Braverman C, Snyder PM, Fenton RA, Meyerholz DK, Abboud FM, Harwani SC. Renal denervation and CD161a immune ablation prevent cholinergic hypertension and renal sodium retention. Am J Physiol Heart Circ Physiol 2019; 317:H517-H530. [PMID: 31172810 DOI: 10.1152/ajpheart.00234.2019] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Cholinergic receptor activation leads to premature development of hypertension and infiltration of proinflammatory CD161a+/CD68+ M1 macrophages into the renal medulla. Renal inflammation is implicated in renal sodium retention and the development of hypertension. Renal denervation is known to decrease renal inflammation. The objective of this study was to determine the role of CD161a+/CD68+ macrophages and renal sympathetic nerves in cholinergic-hypertension and renal sodium retention. Bilateral renal nerve denervation (RND) and immune ablation of CD161a+ immune cells were performed in young prehypertensive spontaneously hypertensive rat (SHR) followed by infusion of either saline or nicotine (15 mg·kg-1·day-1) for 2 wk. Immune ablation was conducted by injection of unconjugated azide-free antibody targeting rat CD161a+. Blood pressure was monitored by tail cuff plethysmography. Tissues were harvested at the end of infusion. Nicotine induced premature hypertension, renal expression of the sodium-potassium chloride cotransporter (NKCC2), increases in renal sodium retention, and infiltration of CD161a+/CD68+ macrophages into the renal medulla. All of these effects were abrogated by RND and ablation of CD161a+ immune cells. Cholinergic activation of CD161a+ immune cells with nicotine leads to the premature development of hypertension in SHR. The effects of renal sympathetic nerves on chemotaxis of CD161a+ macrophages to the renal medulla, increased renal expression of NKCC2, and renal sodium retention contribute to cholinergic hypertension. The CD161a+ immune cells are necessary and essential for this prohypertensive nicotine-mediated inflammatory response.NEW & NOTEWORTHY This is the first study that describes a novel integrative physiological interaction between the adrenergic, cholinergic, and renal systems in the development of hypertension, describing data for the role of each in a genetic model of essential hypertension. Noteworthy findings include the prevention of nicotine-mediated hypertension following successful immune ablation of CD161a+ immune cells and the necessary role these cells play in the overexpression of the sodium-potassium-chloride cotransporter (NKCC2) in the renal medulla and renal sodium retention. Renal infiltration of these cells is demonstrated to be dependent on the presence of renal adrenergic innervation. These data offer a fertile ground of therapeutic potential for the treatment of hypertension as well as open the door for further investigation into the mechanism involved in inflammation-mediated renal sodium transporter expression. Taken together, these findings suggest immune therapy, renal denervation, and, possibly, other new molecular targets as having a potential role in the development and maintenance of essential hypertension.
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Affiliation(s)
- Nandita Raikwar
- Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa
| | - Cameron Braverman
- Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa
| | - Peter M Snyder
- Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa
| | - Robert A Fenton
- Department of Biomedicine, Aarhus University, Aarhus, Denmark
| | - David K Meyerholz
- Division of Comparative Pathology, University of Iowa Carver College of Medicine, Iowa City, Iowa
| | - Francois M Abboud
- Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa.,Departments of Molecular Physiology and Biophysics, University of Iowa Carver College of Medicine, Iowa City, Iowa.,Abboud Cardiovascular Research Center, University of Iowa Carver College of Medicine, Iowa City, Iowa
| | - Sailesh C Harwani
- Department of Internal Medicine, University of Iowa Carver College of Medicine, Iowa City, Iowa.,Center for Immunology and Immune Mediated Diseases, University of Iowa Carver College of Medicine, Iowa City, Iowa.,Abboud Cardiovascular Research Center, University of Iowa Carver College of Medicine, Iowa City, Iowa
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44
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Pollow DP, Uhlorn JA, Sylvester MA, Romero-Aleshire MJ, Uhrlaub JL, Lindsey ML, Nikolich-Zugich J, Brooks HL. Menopause and FOXP3 + Treg cell depletion eliminate female protection against T cell-mediated angiotensin II hypertension. Am J Physiol Heart Circ Physiol 2019; 317:H415-H423. [PMID: 31099612 DOI: 10.1152/ajpheart.00792.2018] [Citation(s) in RCA: 26] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Although it is known that the prevalence and severity of hypertension increases in women after menopause, the contribution of T cells to this process has not been explored. Although the immune system is both necessary and required for the development of angiotensin II (ANG II) hypertension in men, we have demonstrated that premenopausal women are protected from T cell-mediated hypertension. The goal of the current study was to test the hypotheses that 1) female protection against T cell-mediated ANG II hypertension is eliminated following progression into menopause and 2) T regulatory cells (Tregs) provide premenopausal protection against ANG II-induced hypertension. Menopause was induced in Rag-1-/- mice (via 4-vinylcyclohexene diepoxide), and all mice received a 14-day ANG II infusion. Donor CD3+ T cells were adoptively transferred 3 wk before ANG II infusion. In the absence of T cells, systolic blood pressure responses to ANG II were similar to those seen in premenopausal mice (Δ12 mmHg). After adoptive transfer of T cells, ANG II significantly increased systolic blood pressure in postmenopausal females (Δ28 mmHg). A significant increase in F4/80 positive renal macrophages, an increase in renal inflammatory gene expression, along with a reduction in renal expression of mannose receptor C-type 1, a marker for M2 macrophages, accompanied the increase in systolic blood pressure (SBP). Flow cytometric analysis identified that Tregs were significantly decreased in the spleen and kidneys of Rag-1-/- menopausal mice versus premenopausal females, following ANG II infusion. In a validation study, an anti-CD25 antibody was used to deplete Tregs in premenopausal mice, which induced a significant increase in SBP. These results demonstrate that premenopausal protection against T cell-mediated ANG II hypertension is eliminated once females enter menopause, suggesting that a change in hormonal status upregulates macrophage-induced proinflammatory and T cell-dependent responses. Furthermore, we are the first to report that the presence of Tregs are required to suppress ANG II hypertension in premenopausal females.NEW & NOTEWORTHY Whether progression into menopause eliminated female protection against T cell-mediated hypertension was examined. Menopausal mice without T cells remained protected against angiotensin II (ANG II) hypertension; however, in the presence of T cells, blood pressure responses to ANG II increased significantly in menopause. Underlying mechanisms examined were anti-inflammatory protection provided by T regulatory cells in premenopausal females and renal inflammatory processes involving macrophage infiltration and cytokine activation.
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Affiliation(s)
- Dennis P Pollow
- Department of Physiology, University of Arizona, Tucson, Arizona
| | - Joshua A Uhlorn
- Department of Physiology, University of Arizona, Tucson, Arizona
| | | | | | - Jennifer L Uhrlaub
- Department of Immunobiology, University of Arizona, Tucson, Arizona.,University of Arizona Center on Aging, University of Arizona, Tucson, Arizona
| | - Merry L Lindsey
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, Mississippi.,Research Service, G.V. (Sonny) Montgomery Veterans Affairs Medical Center, Jackson, Mississippi
| | - Janko Nikolich-Zugich
- Department of Immunobiology, University of Arizona, Tucson, Arizona.,University of Arizona Center on Aging, University of Arizona, Tucson, Arizona
| | - Heddwen L Brooks
- Department of Physiology, University of Arizona, Tucson, Arizona.,University of Arizona Center on Aging, University of Arizona, Tucson, Arizona.,Department of Pharmacology, University of Arizona, Tucson, Arizona.,Sarver Heart Center, University of Arizona, Tucson, Arizona
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45
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Eldahshan W, Ishrat T, Pillai B, Sayed MA, Alwhaibi A, Fouda AY, Ergul A, Fagan SC. Angiotensin II type 2 receptor stimulation with compound 21 improves neurological function after stroke in female rats: a pilot study. Am J Physiol Heart Circ Physiol 2019; 316:H1192-H1201. [PMID: 30822121 PMCID: PMC6580399 DOI: 10.1152/ajpheart.00446.2018] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Revised: 01/18/2019] [Accepted: 02/26/2019] [Indexed: 12/22/2022]
Abstract
The angiotensin II type 2 receptor (AT2R) agonist, compound 21 (C21), has been shown to be neurovascularly protective after ischemic stroke in male rats. In the current study, we aim to study the impact of C21 treatment on female rats. Young female Wistar rats were subjected to different durations of middle cerebral artery occlusion (MCAO) (3 h, 2 h, and 1 h) using a silicone-coated monofilament, treated at reperfusion with 0.03 mg/kg ip of C21 and followed up for different times (1, 3, and 14 days) after stroke. Behavioral tests were performed (Bederson, paw grasp, beam walk, and rotarod), and animals were euthanized for infarct size analysis and Western blot analysis. In vitro, primary male and female brain microvascular endothelial cells (ECs) were grown in culture, and the expression of the AT2R was compared between males and females. At 1 day, C21 treatment resulted in an improvement in Bederson scores. However, at 3 days and 14 days, the impact of C21 on stroke outcomes was less robust. In vitro, the expression of the AT2R was significantly higher in female ECs compared with male ECs. In conclusion, C21 improves Bederson scores after stroke in female rats when administered early at reperfusion. The ability of C21 to exert its neuroprotective effects might be affected by fluctuating levels of female hormones. NEW & NOTEWORTHY The present study shows the neuroprotective impact of C21 on ischemic stroke in female rats and how the protective effects of C21 can be influenced by the hormonal status of female rodents.
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MESH Headings
- Animals
- Behavior, Animal/drug effects
- Brain/blood supply
- Brain/drug effects
- Brain/physiopathology
- Cells, Cultured
- Disease Models, Animal
- Endothelial Cells/drug effects
- Endothelial Cells/metabolism
- Female
- Infarction, Middle Cerebral Artery/diagnosis
- Infarction, Middle Cerebral Artery/drug therapy
- Infarction, Middle Cerebral Artery/physiopathology
- Infarction, Middle Cerebral Artery/psychology
- Male
- Microvessels/drug effects
- Microvessels/metabolism
- Motor Activity/drug effects
- Neuroprotective Agents/pharmacology
- PPAR gamma/agonists
- PPAR gamma/metabolism
- Pilot Projects
- Rats, Wistar
- Receptor, Angiotensin, Type 2/agonists
- Receptor, Angiotensin, Type 2/genetics
- Receptor, Angiotensin, Type 2/metabolism
- Recovery of Function
- Sex Factors
- Signal Transduction
- Sulfonamides/pharmacology
- Thiophenes/pharmacology
- Time Factors
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Affiliation(s)
- Wael Eldahshan
- Program in Clinical and Experimental Therapeutics, Charlie Norwood Veterans Affairs Medical Center and University of Georgia, College of Pharmacy , Augusta, Georgia
| | - Tauheed Ishrat
- Program in Clinical and Experimental Therapeutics, Charlie Norwood Veterans Affairs Medical Center and University of Georgia, College of Pharmacy , Augusta, Georgia
| | - Bindu Pillai
- Program in Clinical and Experimental Therapeutics, Charlie Norwood Veterans Affairs Medical Center and University of Georgia, College of Pharmacy , Augusta, Georgia
| | - Mohammed A Sayed
- Program in Clinical and Experimental Therapeutics, Charlie Norwood Veterans Affairs Medical Center and University of Georgia, College of Pharmacy , Augusta, Georgia
| | - Abdulrahman Alwhaibi
- Program in Clinical and Experimental Therapeutics, Charlie Norwood Veterans Affairs Medical Center and University of Georgia, College of Pharmacy , Augusta, Georgia
| | - Abdelrahman Y Fouda
- Program in Clinical and Experimental Therapeutics, Charlie Norwood Veterans Affairs Medical Center and University of Georgia, College of Pharmacy , Augusta, Georgia
| | - Adviye Ergul
- Department of Physiology, Augusta University , Augusta, Georgia
| | - Susan C Fagan
- Program in Clinical and Experimental Therapeutics, Charlie Norwood Veterans Affairs Medical Center and University of Georgia, College of Pharmacy , Augusta, Georgia
- Department of Neurology, Augusta University , Augusta, Georgia
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46
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Sander H, Wallace S, Plouse R, Tiwari S, Gomes AV. Ponceau S waste: Ponceau S staining for total protein normalization. Anal Biochem 2019; 575:44-53. [PMID: 30914243 DOI: 10.1016/j.ab.2019.03.010] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2019] [Revised: 03/12/2019] [Accepted: 03/19/2019] [Indexed: 10/27/2022]
Abstract
Normalization of Western blotting data is a critical step that is needed to reduce errors caused by unequal sample loading across lanes in a gel, inconsistent sample preparation, and variations due to experimental errors. Several papers have suggested that total protein normalization may be better than housekeeping protein normalization for Western blotting normalization. Ponceau S is the most commonly used stain for total protein normalization. A review of the literature and commercial websites suggest a multitude of Ponceau S staining protocols for total protein staining of blots. In this study, we explored which Ponceau S staining protocol would result in the highest sensitivity of protein band detection. Unexpectedly, we found that irrespective of the Ponceau S concentration (between 0.001 and 2% (w/v)), acid concentration, and acid type (acetic acid, trichloroacetic acid and/or sulfosalicylic acid), the sensitivity of protein detection remained constant. The most commonly used concentration of Ponceau S is 0.1%, while 0.001% (100-fold less) Ponceau S resulted in the same sensitivity of protein band detection. We suggest the use of the relatively inexpensive 0.01% Ponceau S in 1% acetic acid stain for total protein normalization as it is as effective as all the expensive formulations that are currently used.
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Affiliation(s)
- Hannah Sander
- Department of Neurobiology, Physiology, and Behavior, University of California, Davis, CA, USA
| | - Samantha Wallace
- Department of Neurobiology, Physiology, and Behavior, University of California, Davis, CA, USA
| | - Rachel Plouse
- Department of Neurobiology, Physiology, and Behavior, University of California, Davis, CA, USA
| | - Shuchita Tiwari
- Department of Neurobiology, Physiology, and Behavior, University of California, Davis, CA, USA
| | - Aldrin V Gomes
- Department of Neurobiology, Physiology, and Behavior, University of California, Davis, CA, USA; Department of Physiology and Membrane Biology, University of California, Davis, CA, USA.
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47
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Zhuang L, Li C, Chen Q, Jin Q, Wu L, Lu L, Yan X, Chen K. Fatty acid-binding protein 3 contributes to ischemic heart injury by regulating cardiac myocyte apoptosis and MAPK pathways. Am J Physiol Heart Circ Physiol 2019; 316:H971-H984. [PMID: 30735072 DOI: 10.1152/ajpheart.00360.2018] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Fatty acid-binding protein 3 (FABP3), a low-molecular-weight protein, participates in lipid transportation, storage, signaling transduction, oxidation, and transcription regulation. Here, we investigated the expression and function of FABP3 in ischemic heart diseases and explored the mechanisms by which FABP3 affected remodeling after myocardial infarction (MI). We showed that ischemic or hypoxic conditions upregulated FABP3 expression in vivo and in vitro. Notably, overexpression of FABP3 induced more myocyte apoptosis in the infarction and border areas and aggravated cardiac dysfunction, with lower left ventricular ejection fraction. Meanwhile, overexpression of FABP3 drastically promoted death and apoptosis of neonatal rat ventricular cardiomyocytes under hypoxia. Furthermore, deficiency of FABP3 exerted protective effects against ischemic heart injuries by decreasing cardiac myocyte apoptosis and heart remodeling after MI. We found that overexpression of FABP3 upregulated the phosphorylation of MAPK signaling pathway and decreased phosphorylated Akt levels, which may account for the augmentation of apoptosis and remodeling after MI. To the best of our knowledge, this is the first study to demonstrate that deficiency of FABP3 would protect cardiac myocytes from apoptosis and alleviate cardiac remodeling after MI, suggesting FABP3 as a potential target to preserve cardiac function after MI. NEW & NOTEWORTHY It is an undisputable fact that myocyte apoptosis plays a crucial role in cardiac remodeling and the development of heart failure after myocardial infarction. Here, fatty acid-binding protein 3 deficiency improved myocardial structural remodeling and function by decreasing cell apoptosis and regulating MAPK signaling pathways. We suppose that fatty acid-binding protein 3 may be regarded as a potential intervention approach to preserve cardiomyocytes during myocardial infarction.
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Affiliation(s)
- Lingfang Zhuang
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine , Shanghai , China
| | - Chenni Li
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine , Shanghai , China
| | - Qiujing Chen
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine , Shanghai , China
| | - Qi Jin
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine , Shanghai , China
| | - Liqun Wu
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine , Shanghai , China
| | - Lin Lu
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine , Shanghai , China
| | - Xiaoxiang Yan
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine , Shanghai , China
| | - Kang Chen
- Department of Cardiology, Ruijin Hospital, Shanghai Jiaotong University School of Medicine , Shanghai , China
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48
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Deleon-Pennell KY, Ero OK, Ma Y, Padmanabhan Iyer R, Flynn ER, Espinoza I, Musani SK, Vasan RS, Hall ME, Fox ER, Lindsey ML. Glycoproteomic Profiling Provides Candidate Myocardial Infarction Predictors of Later Progression to Heart Failure. ACS OMEGA 2019; 4:1272-1280. [PMID: 30729226 PMCID: PMC6356850 DOI: 10.1021/acsomega.8b02207] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2018] [Accepted: 12/20/2018] [Indexed: 05/10/2023]
Abstract
We hypothesized that identifying plasma glycoproteins that predict the development of heart failure following myocardial infarction (MI) could help to stratify subjects at risk. Plasma collected at visit 2 (2005-2008) from an MI subset of Jackson Heart Study participants underwent glycoproteomics and was grouped by the outcome: (1) heart failure hospitalization after visit 2 (n = 15) and (2) without hospitalization by 2012 (n = 45). Proteins were mapped for biological processes and functional pathways using Ingenuity Pathway Analysis and linked to clinical characteristics. A total of 198 glycopeptides corresponding to 88 proteins were identified (data available via ProteomeXchange with identifier PXD009870). Of these, 14 glycopeptides were significantly different between MI and MI + HF groups and corresponded to apolipoprotein (Apo) F, transthyretin, Apo C-IV, prostaglandin-D2 synthase, complement C9, and CD59 (p < 0.05 for all). All proteins were elevated in the MI + HF group, except CD59, which was lower. Four canonical pathways were upregulated in the MI + HF group (p < 0.05 for all): acute phase response, liver X receptor/retinoid X receptor, and macrophage reactive oxygen species generation. The coagulation pathway was significantly downregulated in the MI + HF group (p < 0.05). Even after adjustment for age and sex, Apo F was associated with the increased risk for heart failure (OR = 21.84; 95% CI 3.20-149.14). In conclusion, glycoproteomic profiling provided candidate early MI predictors of later progression to heart failure.
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Affiliation(s)
- Kristine Y. Deleon-Pennell
- Mississippi
Center for Heart Research, Department of Physiology and
Biophysics, Department of Preventive Medicine and Cancer Institute, Jackson Heart Study, and Division of Cardiology, UMMC, Jackson, Mississippi 39216-4505, United States
- Research
Service, G.V. (Sonny) Montgomery Veterans Affairs Medical Center, Jackson, Mississippi 39216, United States
- E-mail: . Phone: 843-789-6839. Fax: 843-876-5068 (K.Y.D.-P.)
| | - Osasere K. Ero
- Mississippi
Center for Heart Research, Department of Physiology and
Biophysics, Department of Preventive Medicine and Cancer Institute, Jackson Heart Study, and Division of Cardiology, UMMC, Jackson, Mississippi 39216-4505, United States
| | - Yonggang Ma
- Mississippi
Center for Heart Research, Department of Physiology and
Biophysics, Department of Preventive Medicine and Cancer Institute, Jackson Heart Study, and Division of Cardiology, UMMC, Jackson, Mississippi 39216-4505, United States
| | - Rugmani Padmanabhan Iyer
- Mississippi
Center for Heart Research, Department of Physiology and
Biophysics, Department of Preventive Medicine and Cancer Institute, Jackson Heart Study, and Division of Cardiology, UMMC, Jackson, Mississippi 39216-4505, United States
| | - Elizabeth R. Flynn
- Mississippi
Center for Heart Research, Department of Physiology and
Biophysics, Department of Preventive Medicine and Cancer Institute, Jackson Heart Study, and Division of Cardiology, UMMC, Jackson, Mississippi 39216-4505, United States
| | - Ingrid Espinoza
- Mississippi
Center for Heart Research, Department of Physiology and
Biophysics, Department of Preventive Medicine and Cancer Institute, Jackson Heart Study, and Division of Cardiology, UMMC, Jackson, Mississippi 39216-4505, United States
| | - Solomon K. Musani
- Mississippi
Center for Heart Research, Department of Physiology and
Biophysics, Department of Preventive Medicine and Cancer Institute, Jackson Heart Study, and Division of Cardiology, UMMC, Jackson, Mississippi 39216-4505, United States
| | - Ramachandran S. Vasan
- Preventive
Medicine and Epidemiology and Cardiology, Department of Medicine, Boston University School of Medicine, Boston University, Boston, Massachusetts 02118, United States
| | - Michael E. Hall
- Mississippi
Center for Heart Research, Department of Physiology and
Biophysics, Department of Preventive Medicine and Cancer Institute, Jackson Heart Study, and Division of Cardiology, UMMC, Jackson, Mississippi 39216-4505, United States
| | - Ervin R. Fox
- Mississippi
Center for Heart Research, Department of Physiology and
Biophysics, Department of Preventive Medicine and Cancer Institute, Jackson Heart Study, and Division of Cardiology, UMMC, Jackson, Mississippi 39216-4505, United States
| | - Merry L. Lindsey
- Mississippi
Center for Heart Research, Department of Physiology and
Biophysics, Department of Preventive Medicine and Cancer Institute, Jackson Heart Study, and Division of Cardiology, UMMC, Jackson, Mississippi 39216-4505, United States
- Research
Service, G.V. (Sonny) Montgomery Veterans Affairs Medical Center, Jackson, Mississippi 39216, United States
- E-mail: . Phone: 601-815-1329. Fax: 601-984-1817 (M.L.L.)
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49
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Scofield SLC, Dalal S, Lim KA, Thrasher PR, Daniels CR, Peterson JM, Singh M, Singh K. Exogenous ubiquitin reduces inflammatory response and preserves myocardial function 3 days post-ischemia-reperfusion injury. Am J Physiol Heart Circ Physiol 2019; 316:H617-H628. [PMID: 30681370 DOI: 10.1152/ajpheart.00654.2018] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
β-Adrenergic receptor (β-AR) stimulation increases extracellular levels of ubiquitin (UB) in myocytes, and exogenous UB decreases β-AR-stimulated myocyte apoptosis and myocardial fibrosis. Here, we hypothesized that exogenous UB modulates the inflammatory response, thereby playing a protective role in cardiac remodeling after ischemia-reperfusion (I/R) injury. C57BL/6 mice infused with vehicle or UB (1 μg·g-1·h-1) were subjected to myocardial I/R injury. Functional and biochemical parameters of the heart were examined 3 days post-I/R. Heart weight-to-body weight ratios were similarly increased in I/R and UB + I/R groups. The area at risk and infarct size were significantly lower in UB + I/R versus I/R groups. Measurement of heart function using echocardiography revealed that I/R decreases percent fractional shortening and percent ejection fraction. However, the decrease in fractional shortening and ejection fraction was significantly lower in the UB + I/R group. The UB + I/R group displayed a significant decrease in inflammatory infiltrates, neutrophils, and macrophages versus the I/R group. Neutrophil activity was significantly lower in the UB + I/R group. Analysis of the concentration of a panel of 23 cytokines/chemokines in the serum using a Bio-Plex assay revealed a significantly lower concentration of IL-12 subunit p40 in the UB + I/R versus I/R group. The concentration of monocyte chemotactic protein-1 was lower, whereas the concentration of macrophage inflammatory protein-1α was significantly higher, in the UB+I/R group versus the sham group. Expression of matrix metalloproteinase (MMP)-2 and activity of MMP-9 were higher in the UB + I/R group versus the I/R group. Levels of ubiquitinated proteins and tissue inhibitor of metalloproteinase 2 expression were increased to a similar extent in both I/R groups. Thus, exogenous UB plays a protective role in myocardial remodeling post-I/R with effects on cardiac function, area at risk/infarct size, the inflammatory response, levels of serum cytokines/chemokines, and MMP expression and activity. NEW & NOTEWORTHY Stimulation of β-adrenergic receptors increases extracellular levels of ubiquitin (UB) in myocytes, and exogenous UB decreases β-adrenergic receptor-stimulated myocyte apoptosis and myocardial fibrosis. Here, we provide evidence that exogenous UB decreases the inflammatory response and preserves heart function 3 days after myocardial ischemia-reperfusion injury. Further identification of the molecular events involved in the anti-inflammatory role of exogenous UB may provide therapeutic targets for patients with ischemic heart disease.
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Affiliation(s)
- Stephanie L C Scofield
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee
| | - Suman Dalal
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee.,Center of Excellence for Inflammation, Infectious Disease and Immunity, East Tennessee State University, Johnson City, Tennessee
| | - Kristina A Lim
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee
| | - Patsy R Thrasher
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee
| | - Christopher R Daniels
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee
| | - Jonathan M Peterson
- Center of Excellence for Inflammation, Infectious Disease and Immunity, East Tennessee State University, Johnson City, Tennessee.,Department of Health Sciences, College of Public Health, East Tennessee State University, Johnson City, Tennessee
| | - Mahipal Singh
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee
| | - Krishna Singh
- Department of Biomedical Sciences, James H. Quillen College of Medicine, East Tennessee State University, Johnson City, Tennessee.,Center of Excellence for Inflammation, Infectious Disease and Immunity, East Tennessee State University, Johnson City, Tennessee.,James H. Quillen Veterans Affairs Medical Center, Mountain Home, Tennessee
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50
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Are These Cardiomyocytes? Protocol Development Reveals Impact of Sample Preparation on the Accuracy of Identifying Cardiomyocytes by Flow Cytometry. Stem Cell Reports 2019; 12:395-410. [PMID: 30686762 PMCID: PMC6373208 DOI: 10.1016/j.stemcr.2018.12.016] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 12/20/2018] [Accepted: 12/21/2018] [Indexed: 11/20/2022] Open
Abstract
Several protocols now support efficient differentiation of human pluripotent stem cells to cardiomyocytes (hPSC-CMs) but these still indicate line-to-line variability. As the number of studies implementing this technology expands, accurate assessment of cell identity is paramount to well-defined studies that can be replicated among laboratories. While flow cytometry is apt for routine assessment, a standardized protocol for assessing cardiomyocyte identity has not yet been established. Therefore, the current study leveraged targeted mass spectrometry to confirm the presence of troponin proteins in day 25 hPSC-CMs and systematically evaluated multiple anti-troponin antibodies and sample preparation protocols for their suitability in assessing cardiomyocyte identity. Results demonstrate challenges to interpreting data generated by published methods and inform the development of a robust protocol for routine assessment of hPSC-CMs. The data, workflow for antibody evaluation, and standardized protocol described here should benefit investigators new to this field and those with expertise in hPSC-CM differentiation. TNNI3 and TNNT2 proteins are present in day 25 hPSC-CMs Commonly used reagents can lead to non-specific binding of anti-troponin antibodies A fit-for-purpose workflow describes how to develop a flow cytometry protocol A robust protocol for routine quality control testing was validated for hPSC-CMs
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