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Schelemei P, Wagner E, Picard FSR, Winkels H. Macrophage mediators and mechanisms in cardiovascular disease. FASEB J 2024; 38:e23424. [PMID: 38275140 DOI: 10.1096/fj.202302001r] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 12/21/2023] [Accepted: 12/29/2023] [Indexed: 01/27/2024]
Abstract
Macrophages are major players in myocardial infarction (MI) and atherosclerosis, two major cardiovascular diseases (CVD). Atherosclerosis is caused by the buildup of cholesterol-rich lipoproteins in blood vessels, causing inflammation, vascular injury, and plaque formation. Plaque rupture or erosion can cause thrombus formation resulting in inadequate blood flow to the heart muscle and MI. Inflammation, particularly driven by macrophages, plays a central role in both atherosclerosis and MI. Recent integrative approaches of single-cell analysis-based classifications in both murine and human atherosclerosis as well as experimental MI showed overlap in origin, diversity, and function of macrophages in the aorta and the heart. We here discuss differences and communalities between macrophages in the heart and aorta at steady state and in atherosclerosis or upon MI. We focus on markers, mediators, and functional states of macrophage subpopulations. Recent trials testing anti-inflammatory agents show a major benefit in reducing the inflammatory burden of CVD patients, but highlight a necessity for a broader understanding of immune cell ontogeny and heterogeneity in CVD. The novel insights into macrophage biology in CVD represent exciting opportunities for the development of novel treatment strategies against CVD.
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Affiliation(s)
- Patrik Schelemei
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Clinic III for Internal Medicine, Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
| | - Elena Wagner
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Clinic III for Internal Medicine, Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
| | - Felix Simon Ruben Picard
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Clinic III for Internal Medicine, Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
| | - Holger Winkels
- University of Cologne, Faculty of Medicine and University Hospital Cologne, Clinic III for Internal Medicine, Cologne, Germany
- Center for Molecular Medicine Cologne (CMMC), University of Cologne, Cologne, Germany
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Han X, Zhang G, Chen G, Wu Y, Xu T, Xu H, Liu B, Zhou Y. Buyang Huanwu Decoction promotes angiogenesis in myocardial infarction through suppression of PTEN and activation of the PI3K/Akt signalling pathway. JOURNAL OF ETHNOPHARMACOLOGY 2022; 287:114929. [PMID: 34952189 DOI: 10.1016/j.jep.2021.114929] [Citation(s) in RCA: 14] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Revised: 12/07/2021] [Accepted: 12/16/2021] [Indexed: 06/14/2023]
Abstract
ETHNOPHARMACOLOGICAL RELEVANCE Myocardial infarction (MI) is the most severe subtype of coronary artery disease. Recent studies have demonstrated that the repair process and prognosis of MI are closely related to microcirculatory function in myocardial tissue. Buyang Huanwu Decoction (BYHWD) has shown great potential in the treatment of MI. However, the effects and mechanisms of BYHWD on angiogenesis post-MI remain unclear. AIM OF THE STUDY The study aimed to explore the promotion of angiogenesis by BYHWD post-MI and the potential mechanisms in vivo and in vitro. MATERIALS AND METHODS MI in mice was induced by permanent ligature of the coronary artery. The sample was divided into sham, model, and BYHWD treatment groups. After four weeks, the effects of BYHWD treatment on cardiac function were evaluated by echocardiography and HE and Masson staining. Angiogenesis was detected by CD 31 immunofluorescence staining in vivo. Then, various databases were searched to identify the corresponding targets of BYHWD in order to explore the molecular mechanisms underlying its effects in MI. Moreover, Western blot and immunohistochemistry were employed to measure the PTEN/PI3K/Akt/GSK3β signalling pathway and VEGFA expression in MI mice. Finally, the effects of BYHWD on cell angiogenesis and the activation of the PTEN/PI3K/Akt/GSK3β pathway in primary HUVECs were investigated. Overexpression of PTEN was achieved by an adenovirus vector encoding PTEN. RESULTS BYHWD significantly promoted angiogenesis and improved cardiac function in MI mice. Target prediction analysis suggested that BYHWD ameliorates MI via the PI3K/Akt pathway. BYHWD promoted angiogenesis post-MI by suppressing PTEN and activating the PI3K/Akt/GSK3β signalling pathway in vivo and in vitro. Moreover, the effects of BYHWD on HUVEC angiogenesis and the expression of PI3K/Akt/GSK3β signalling pathway-associated proteins were partially abrogated by the overexpression of PTEN. CONCLUSION Collectively, this study demonstrates that BYHWD exerts cardioprotective effects against MI by targeting angiogenesis. These effects are related to suppressing PTEN and activating the PI3K/Akt/GSK3β signalling pathway by BYHWD.
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Affiliation(s)
- Xin Han
- School of Traditional Chinese Medicine, Department of Traditional Chinese Medicine, Nanfang Hospital (ZengCheng Branch), Southern Medical University, Guangzhou, 510515, China
| | - Guoyong Zhang
- School of Traditional Chinese Medicine, Department of Traditional Chinese Medicine, Nanfang Hospital (ZengCheng Branch), Southern Medical University, Guangzhou, 510515, China
| | - Guanghong Chen
- School of Traditional Chinese Medicine, Department of Traditional Chinese Medicine, Nanfang Hospital (ZengCheng Branch), Southern Medical University, Guangzhou, 510515, China
| | - Yuting Wu
- School of Traditional Chinese Medicine, Department of Traditional Chinese Medicine, Nanfang Hospital (ZengCheng Branch), Southern Medical University, Guangzhou, 510515, China
| | - Tong Xu
- School of Traditional Chinese Medicine, Department of Traditional Chinese Medicine, Nanfang Hospital (ZengCheng Branch), Southern Medical University, Guangzhou, 510515, China
| | - Honglin Xu
- School of Traditional Chinese Medicine, Department of Traditional Chinese Medicine, Nanfang Hospital (ZengCheng Branch), Southern Medical University, Guangzhou, 510515, China
| | - Bin Liu
- Department of Traditional Chinese Medicine (Institute of Integration of Traditional and Western Medicine of Guangzhou Medical University, State Key Laboratory of Respiratory Disease), The Second Affiliated Hospital of Guangzhou Medical University, Guangzhou Medical University, Guangzhou, 510260, China.
| | - Yingchun Zhou
- School of Traditional Chinese Medicine, Department of Traditional Chinese Medicine, Nanfang Hospital (ZengCheng Branch), Southern Medical University, Guangzhou, 510515, China.
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Wen ZJ, Xin H, Wang YC, Liu HW, Gao YY, Zhang YF. Emerging roles of circRNAs in the pathological process of myocardial infarction. MOLECULAR THERAPY. NUCLEIC ACIDS 2021; 26:828-848. [PMID: 34729251 PMCID: PMC8536508 DOI: 10.1016/j.omtn.2021.10.002] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Myocardial infarction (MI) is defined as cardiomyocyte death in a clinical context consistent with ischemic insult. MI remains one of the leading causes of morbidity and mortality worldwide. Although there are a number of effective clinical methods for the diagnosis and treatment of MI, further investigation of novel biomarkers and molecular therapeutic targets is required. Circular RNAs (circRNAs), novel non-coding RNAs, have been reported to function mainly by acting as microRNA (miRNA) sponges or binding to RNA-binding proteins (RBPs). The circRNA-miRNA-mRNA (protein) regulatory pathway regulates gene expression and affects the pathological mechanisms of various diseases. Undoubtedly, a more comprehensive understanding of the relationship between MI and circRNA will lay the foundation for the development of circRNA-based diagnostic and therapeutic strategies for MI. Therefore, this review summarizes the pathophysiological process of MI and various approaches to measure circRNA levels in MI patients, tissues, and cells; highlights the significance of circRNAs in the regulation MI pathogenesis and development; and provides potential clinical insight for the diagnosis, prognosis, and treatment of MI.
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Affiliation(s)
- Zeng-Jin Wen
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao 266021, China
| | - Hui Xin
- Department of Cardiology, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Yong-Chen Wang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao 266021, China
| | - Hao-Wen Liu
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao 266021, China
| | - Yan-Yan Gao
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao 266021, China
| | - Yin-Feng Zhang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao 266021, China
- Correspondence: Yin-Feng Zhang, Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, College of Medicine, Qingdao University, Qingdao 266021, China.
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Cheng S, Zhang X, Feng Q, Chen J, Shen L, Yu P, Yang L, Chen D, Zhang H, Sun W, Chen X. Astragaloside IV exerts angiogenesis and cardioprotection after myocardial infarction via regulating PTEN/PI3K/Akt signaling pathway. Life Sci 2019; 227:82-93. [DOI: 10.1016/j.lfs.2019.04.040] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 04/08/2019] [Accepted: 04/16/2019] [Indexed: 12/27/2022]
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Amato G, Romano G, Puleio R, Agrusa A, Goetze T, Gulotta E, Gordini L, Erdas E, Calò P. Neomyogenesis in 3D Dynamic Responsive Prosthesis for Inguinal Hernia Repair. Artif Organs 2018; 42:1216-1223. [DOI: 10.1111/aor.13286] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/17/2018] [Revised: 04/10/2018] [Indexed: 12/11/2022]
Affiliation(s)
- Giuseppe Amato
- Postgraduate School of General Surgery; University of Cagliari; Cagliari Italy
| | - Giorgio Romano
- Department of General Surgery and Emergency; University of Palermo
| | - Roberto Puleio
- Department of Pathologic Anatomy and Histology; IZSS; Palermo
| | - Antonino Agrusa
- Department of General Surgery and Emergency; University of Palermo
| | - Thorsten Goetze
- Institut für Klinisch-Onkologische Forschung Krankenhaus Nordwest Frankfurt/Main; Germany
| | - Eliana Gulotta
- Department of General Surgery and Emergency; University of Palermo
| | - Luca Gordini
- Department of General Surgery; University of Cagliari; Italy
| | - Enrico Erdas
- Department of General Surgery; University of Cagliari; Italy
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Fracassi F, Niccoli G. Angiogénesis y obstrucción microvascular: ¿constituye ya una diana terapéutica? Rev Esp Cardiol 2018. [DOI: 10.1016/j.recesp.2017.09.015] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Fracassi F, Niccoli G. Angiogenesis and Microvascular Obstruction: Still a Research Topic or a New Therapeutic Target? ACTA ACUST UNITED AC 2017; 71:420-422. [PMID: 29129526 DOI: 10.1016/j.rec.2017.09.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 09/15/2017] [Indexed: 10/18/2022]
Affiliation(s)
- Francesco Fracassi
- Institute of Cardiology, Catholic University of the Sacred Heart, Rome, Italy
| | - Giampaolo Niccoli
- Institute of Cardiology, Catholic University of the Sacred Heart, Rome, Italy.
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Zimna A, Wiernicki B, Kolanowski T, Rozwadowska N, Malcher A, Labedz W, Trzeciak T, Chojnacka K, Bednarek-Rajewska K, Majewski P, Kurpisz M. Biological and Pro-Angiogenic Properties of Genetically Modified Human Primary Myoblasts Overexpressing Placental Growth Factor in In Vitro and In Vivo Studies. Arch Immunol Ther Exp (Warsz) 2017; 66:145-159. [PMID: 28951939 PMCID: PMC5851700 DOI: 10.1007/s00005-017-0486-2] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 07/11/2017] [Indexed: 01/01/2023]
Abstract
Cardiovascular diseases are a growing problem in developing countries; therefore, there is an ongoing intensive search for new approaches to treat these disorders. Currently, cellular therapies are focused on healing the damaged heart by implanting stem cells modified with pro-angiogenic factors. This approach ensures that the introduced cells are capable of fulfilling the complex requirements of the environment, including the replacement of the post-infarction scar with cells that are able to contract and promote the formation of new blood vessels that can supply the ischaemic region with nutrients and oxygen. This study focused on the genetic modification of human skeletal muscle cells (SkMCs). We chose myoblast cells due to their close biological resemblance to cardiomyocytes and the placental growth factor (PlGF) gene due to its pro-angiogenic potential. In our in vitro studies, we transfected SkMCs with the PlGF gene using electroporation, which has previously been proven to be efficient and generate robust overexpression of the PlGF gene and elevate PlGF protein secretion. Moreover, the functionality of the secreted pro-angiogenic proteins was confirmed using an in vitro capillary development assay. We have also examined the influence of PlGF overexpression on VEGF-A and VEGF-B, which are well-known factors described in the literature as the most potent activators of blood vessel formation. We were able to confirm the overexpression of VEGF-A in myoblasts transfected with the PlGF gene. The results obtained in this study were further verified in an animal model. These data were able to confirm the potential therapeutic effects of the applied treatments.
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Affiliation(s)
- Agnieszka Zimna
- Institute of Human Genetics, Polish Academy of Sciences, Strzeszynska 32, 60-479, Poznan, Poland
| | - Bartosz Wiernicki
- Institute of Human Genetics, Polish Academy of Sciences, Strzeszynska 32, 60-479, Poznan, Poland
| | - Tomasz Kolanowski
- Institute of Human Genetics, Polish Academy of Sciences, Strzeszynska 32, 60-479, Poznan, Poland
| | - Natalia Rozwadowska
- Institute of Human Genetics, Polish Academy of Sciences, Strzeszynska 32, 60-479, Poznan, Poland
| | - Agnieszka Malcher
- Institute of Human Genetics, Polish Academy of Sciences, Strzeszynska 32, 60-479, Poznan, Poland
| | - Wojciech Labedz
- Department of Orthopaedics and Traumatology, W. Dega University Hospital, Poznan University of Medical Sciences, Poznan, Poland
| | - Tomasz Trzeciak
- Department of Orthopaedics and Traumatology, W. Dega University Hospital, Poznan University of Medical Sciences, Poznan, Poland
| | - Katarzyna Chojnacka
- Department of Clinical Pathomorphology, H. Swiecicki University Hospital, Poznan University of Medical Sciences, Poznan, Poland
| | - Katarzyna Bednarek-Rajewska
- Department of Clinical Pathomorphology, H. Swiecicki University Hospital, Poznan University of Medical Sciences, Poznan, Poland
| | - Przemyslaw Majewski
- Department of Clinical Pathomorphology, H. Swiecicki University Hospital, Poznan University of Medical Sciences, Poznan, Poland
| | - Maciej Kurpisz
- Institute of Human Genetics, Polish Academy of Sciences, Strzeszynska 32, 60-479, Poznan, Poland.
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Qi Q, Lu L, Li H, Yuan Z, Chen G, Lin M, Ruan Z, Ye X, Xiao Z, Zhao Q. Spatiotemporal delivery of nanoformulated liraglutide for cardiac regeneration after myocardial infarction. Int J Nanomedicine 2017; 12:4835-4848. [PMID: 28744119 PMCID: PMC5511023 DOI: 10.2147/ijn.s132064] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
The local, intramyocardial injection of proteins into the infarcted heart is an attractive option to initiate cardiac regeneration after myocardial infarction (MI). Liraglutide, which was developed as a treatment for type 2 diabetes, has been implicated as one of the most promising protein candidates in cardiac regeneration. A significant challenge to the therapeutic use of this protein is its short half-life in vivo. In this study, we evaluated the therapeutic effects and long-term retention of liraglutide loaded in poly(lactic-co-glycolic acid)-poly(ethylene glycol) (PLGA-PEG) nanoparticles (NP-liraglutide) on experimental MI. PLGA-PEG nanoparticles (NPs) have been shown to efficiently load liraglutide and release bioactive liraglutide in a sustained manner. For in vitro test, the released liraglutide retained bioactivity, as measured by its ability to activate liraglutide signaling pathways. Next, we compared the effects of an intramyocardial injection of saline, empty NPs, free liraglutide and NP-liraglutide in a rat model of MI. NPs were detected in the myocardium for up to 4 weeks. More importantly, an intramyocardial injection of NP-liraglutide was sufficient to improve cardiac function (P<0.05), attenuate the infarct size (P<0.05), preserve wall thickness (P<0.05), promote angiogenesis (P<0.05) and prevent cardiomyocyte apoptosis (P<0.05) at 4 weeks after injection without affecting glucose levels. The local, controlled, intramyocardial delivery of NP-liraglutide represents an effective and promising strategy for the treatment of MI.
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Affiliation(s)
- Quan Qi
- Department of Cardiac Surgery, Rui Jin Hospital
| | - Lei Lu
- Department of Pharmacology, Institute of Medical Sciences.,Translational Medicine Collaborative Innovation Center, Shanghai Jiao Tong University School of Medicine, Shanghai
| | - Haiqing Li
- Department of Cardiac Surgery, Rui Jin Hospital
| | - Zhize Yuan
- Department of Cardiac Surgery, Rui Jin Hospital
| | - Gaoxian Chen
- Department of Pharmacology, Institute of Medical Sciences.,Translational Medicine Collaborative Innovation Center, Shanghai Jiao Tong University School of Medicine, Shanghai
| | - Miao Lin
- Department of Pharmacology, Institute of Medical Sciences.,Translational Medicine Collaborative Innovation Center, Shanghai Jiao Tong University School of Medicine, Shanghai
| | - Zhengwen Ruan
- Department of Cardiology, Yuyao People's Hospital, Yuyao, Zhejiang
| | - Xiaofeng Ye
- Department of Cardiac Surgery, Rui Jin Hospital
| | - Zeyu Xiao
- Department of Pharmacology, Institute of Medical Sciences.,Translational Medicine Collaborative Innovation Center, Shanghai Jiao Tong University School of Medicine, Shanghai.,Collaborative Innovation Center of Systems Biomedicine, Shanghai Jiao Tong University School of Medicine, Shanghai, People's Republic of China
| | - Qiang Zhao
- Department of Cardiac Surgery, Rui Jin Hospital
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Jin P, Li T, Li X, Shen X, Zhao Y. Suppression of oxidative stress in endothelial progenitor cells promotes angiogenesis and improves cardiac function following myocardial infarction in diabetic mice. Exp Ther Med 2016; 11:2163-2170. [PMID: 27284297 PMCID: PMC4887798 DOI: 10.3892/etm.2016.3236] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2014] [Accepted: 01/26/2016] [Indexed: 12/11/2022] Open
Abstract
Myocardial infarction is a major contributor to morbidity and mortality in diabetes, which is characterized by inadequate angiogenesis and consequent poor blood reperfusion in the diabetic ischemic heart. The aim of the present study was to investigate the effect that oxidative stress in endothelial progenitor cells (EPCs) has on cardiac angiogenesis in diabetic mice. EPCs derived from diabetic mice revealed reductions in superoxide dismutase (SOD) expression levels and activity compared with those from normal mice. An endothelial tube formation assay showed that angiogenesis was markedly delayed for diabetic EPCs, compared with normal controls. EPCs subjected to various pretreatments were tested as a cell therapy in a diabetic mouse model of myocardial infarction. Induction of oxidative stress in normal EPCs by H2O2 or small interfering RNA-mediated knockdown of SOD reduced their angiogenic activity in the ischemic myocardium of the diabetic mice. Conversely, cell therapy using EPCs from diabetic mice following SOD gene overexpression or treatment with the antioxidant Tempol normalized their ability to promote angiogenesis. These results indicate that decreased expression levels of SOD in EPCs contribute to impaired angiogenesis. In addition, normalization of diabetic EPCs by ex vivo SOD gene therapy accelerates the ability of the EPCs to promote angiogenesis and improve cardiac function when used as a cell therapy following myocardial infarction in diabetic mice.
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Affiliation(s)
- Peng Jin
- Cardiovascular Center, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Tao Li
- Cardiovascular Center, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Xueqi Li
- Cardiovascular Center, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Xinghua Shen
- Cardiovascular Center, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
| | - Yanru Zhao
- Cardiovascular Center, The Fourth Affiliated Hospital, Harbin Medical University, Harbin, Heilongjiang 150001, P.R. China
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Differentiation of Bone Marrow Mesenchymal Stem Cells to Cardiomyocyte-Like Cells Is Regulated by the Combined Low Dose Treatment of Transforming Growth Factor-β1 and 5-Azacytidine. Stem Cells Int 2015; 2016:3816256. [PMID: 26697074 PMCID: PMC4677250 DOI: 10.1155/2016/3816256] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/19/2015] [Revised: 05/24/2015] [Accepted: 07/15/2015] [Indexed: 12/03/2022] Open
Abstract
Bone marrow mesenchymal stem cells (BMMSCs) are used in cardiac tissue engineering for the regeneration of diseased hearts. We examined the differentiation of rat BMMSCs into cardiomyocyte-like cells when induced with a combined low dose treatment of transforming growth factor-β1 (TGF-β1) and 5-azacytidine (5-AZA). Results showed that cell proliferation in the combined low dose treatment group of TGF-β1 and 5-AZA was increased compared with the TGF-β1 group or the 5-AZA group. The cell apoptosis was relieved by combined TGF-β1 and 5-AZA treatment compared to 5-AZA treatment alone. The number of cells positive for myosin heavy chain, connexin-43, α-actin, and troponin I in the combined treatment group was higher than those observed in the TGF-β1 group or the 5-AZA group. Moreover, the combined low dose treatment group of TGF-β1 and 5-AZA reveals the strongest expression of troponin I, α-actin, and phosphorylated extracellular signal-regulated protein kinases 1 and 2 (p-ErK1/2) among the treatment groups. These results suggest that the combined low dose treatment of TGF-β1 and 5-AZA can improve the differentiation potential of rat BMMSCs into cardiomyocyte-like cells and alleviate cell damage effects in vitro. The mechanism that is involved in influencing differentiation may be associated with p-ErK1/2.
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Chang D, Wen Z, Wang Y, Cai W, Wani M, Paul C, Okano T, Millard RW, Wang Y. Ultrastructural features of ischemic tissue following application of a bio-membrane based progenitor cardiomyocyte patch for myocardial infarction repair. PLoS One 2014; 9:e107296. [PMID: 25310410 PMCID: PMC4195599 DOI: 10.1371/journal.pone.0107296] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2014] [Accepted: 08/08/2014] [Indexed: 01/09/2023] Open
Abstract
Background and Objective Implantation of cell-sheets into damaged regions of the heart after myocardial infarction (MI) has been shown to improve heart function. However, the tissue morphology following application of induced pluripotent stem cell (iPSC)-derived cardiomyocytes (CM) has not been studied in detail at the level afforded by electron microscopy. We hypothesized that increasing the number of CM derived from iPSC would increase the effectiveness of cell-sheets used to treat ischemic cardiomyopathy. We report here on the ultrastructural features after application of a bio-membrane ‘cell patch’. Methods iPSC-derived progenitor cells were transduced using lentivirus vectors with or without NCX1 promoter. iPSC-CM sheets were transplanted over the transmural MI region in a mouse model of regional ischemic cardiomyopathy. Mice were divided into four groups, 1) Sham; 2) MI; 3) MI + iPSC without NCX1 treated cells (MI + iPSCNull) and 4) MI + iPSC receiving NCX1 promoter treated cells (MI + iPSCNCX1). Echocardiography was performed 4 weeks after cell patch application, followed by histological and transmission electron microscopy (TEM) analysis. Results Large numbers of transplanted CM were observed with significant improvements in left ventricular performance and remodeling in group 4 as compared with group 3. No teratoma formation was detected in any of the treatment groups. Conclusion Manipulation of iPSC yields large numbers of iPSC-CM and favorable morphological and ultrastructural tissue changes. These changes have the potential to enhance current methods used for restoration of cardiac function after MI.
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Affiliation(s)
- Dehua Chang
- Department of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Tokyo, Japan
- Department of Pathology and Laboratory Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Zhili Wen
- Department of Pathology and Laboratory Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Yuhua Wang
- Department of Pathology and Laboratory Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Wenfeng Cai
- Department of Pathology and Laboratory Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Mashhood Wani
- Department of Pathology and Laboratory Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Christian Paul
- Department of Pathology and Laboratory Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Teruo Okano
- Department of Advanced Biomedical Engineering and Science, Tokyo Women's Medical University, Tokyo, Japan
| | - Ronald W. Millard
- Department of Pharmacology and Cell Biophysics, University of Cincinnati, Cincinnati, Ohio, United States of America
| | - Yigang Wang
- Department of Pathology and Laboratory Medicine, University of Cincinnati, Cincinnati, Ohio, United States of America
- * E-mail:
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Hu H, Xuan Y, Wang Y, Xue M, Suo F, Li X, Cheng W, Li X, Yin J, Liu J, Yan S. Targeted NGF siRNA delivery attenuates sympathetic nerve sprouting and deteriorates cardiac dysfunction in rats with myocardial infarction. PLoS One 2014; 9:e95106. [PMID: 24755692 PMCID: PMC3995702 DOI: 10.1371/journal.pone.0095106] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2013] [Accepted: 03/24/2014] [Indexed: 01/23/2023] Open
Abstract
Nerve growth factor (NGF) is involved in nerve sprouting, hyper-innervation, angiogenesis, anti-apoptosis, and preservation of cardiac function after myocardial infarction (MI). Positively modulating NGF expression may represent a novel pharmacological strategy to improve post-infarction prognosis. In this study, lentivirus encoding NGF short interfering RNA (siRNA) was prepared, and MI was modeled in the rat using left anterior descending coronary artery ligation. Rats were randomly grouped to receive intramyocardial injection of lentiviral solution containing NGF-siRNA (n = 19, MI-SiNGF group), lentiviral solution containing empty vector (n = 18, MI-GFP group) or 0.9% NaCl solution (n = 18, MI-control group), or to receive thoracotomy and pericardiotomy (n = 17, sham-operated group). At 1, 2, 4, and 8 wk after transduction, rats in the MI-control group had higher levels of NGF mRNA and protein than those in the sham-operated group, rats in the MI-GFP group showed similar levels as the MI-control group, and rats in the MI-SiNGF group had lower levels compared to the MI-GFP group, indicating that MI model was successfully established and NGF siRNA effectively inhibited the expression of NGF. At 8 wk, echocardiographic and hemodynamic studies revealed a more severe cardiac dysfunction in the MI-siRNA group compared to the MI-GFP group. Moreover, rats in the MI-siRNA group had lower mRNA and protein expression levels of tyrosine hydroxylase (TH) and growth-associated protein 43-positive nerve fibers (GAP-43) at both the infarcted border and within the non-infarcted left ventricles (LV). NGF silencing also reduced the vascular endothelial growth factor (VEGF) expression and decreased the arteriolar and capillary densities at the infarcted border compared to the MI-GFP group. Histological analysis indicated a large infarcted size in the MI-SiNGF group. These findings suggested that endogenous NGF silencing attenuated sympathetic nerve sprouting and angiogenesis, enlarged the infarct size, aggravated cardiac dysfunction, and potentially contributed to an unfavorable prognosis after MI.
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Affiliation(s)
- Hesheng Hu
- School of Medicine, Shandong University, Jinan, China
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Yongli Xuan
- School of Medicine, Shandong University, Jinan, China
| | - Ye Wang
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Mei Xue
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Fei Suo
- School of Medicine, Shandong University, Jinan, China
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Xiaolu Li
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Wenjuan Cheng
- School of Medicine, Shandong University, Jinan, China
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Xinran Li
- School of Medicine, Shandong University, Jinan, China
| | - Jie Yin
- School of Medicine, Shandong University, Jinan, China
| | - Ju Liu
- Medical Research Center, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
| | - Suhua Yan
- Department of Cardiology, Shandong Provincial Qianfoshan Hospital, Shandong University, Jinan, China
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Thirunavukkarasu M, Selvaraju V, Dunna NR, Foye JL, Joshi M, Otani H, Maulik N. Simvastatin treatment inhibits hypoxia inducible factor 1-alpha-(HIF-1alpha)-prolyl-4-hydroxylase 3 (PHD-3) and increases angiogenesis after myocardial infarction in streptozotocin-induced diabetic rat. Int J Cardiol 2013; 168:2474-80. [DOI: 10.1016/j.ijcard.2013.03.005] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/21/2012] [Accepted: 03/09/2013] [Indexed: 10/27/2022]
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Tongxinluo Improves Cardiac Function and Ameliorates Ventricular Remodeling in Mice Model of Myocardial Infarction through Enhancing Angiogenesis. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2013; 2013:813247. [PMID: 24069057 PMCID: PMC3771470 DOI: 10.1155/2013/813247] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/13/2013] [Accepted: 07/25/2013] [Indexed: 11/23/2022]
Abstract
Background. Myocardial infarction (MI) is a major cause of morbidity and mortality in the world. Tongxinluo (TXL) is a traditional Chinese compound prescription which has cardioprotective functions. The present study was aimed to determine the effect of TXL on postischemic cardiac dysfunction and cardiac remodeling and to elucidate the underlying mechanisms. Methods and Results. MI was performed by ligation of left anterior descending coronary artery (LAD) in male adult mice. Mice were randomly divided into four groups: (1) sham group (Sham); (2) MI-control group (Control); (3) MI-low dose TXL group (TXL-L); and (4) MI-high dose TXL (TXL-H) group. Compared with the control group, TXL treatment restored cardiac function, increased revascularization, attenuated cardiomyocyte apoptosis, and reduced interstitial fibrosis. TXL treatment increased the phosphorylation of Akt, extracellular signal regulated kinase (ERK), and endothelial nitric oxide synthase (eNOS); the expression of phosphatidylinositol3-kinase (PI3K), hypoxia-inducible factors 1α (HIF-1α), and vascular endothelial growth factor (VEGF); and the DNA binding activity of HIF-1α after MI. Conclusion. TXL may improve cardiac function and ameliorate cardiac remodeling by increasing neovascularization through enhancing the phosphorylation of Akt and ERK, the expression and activity of HIF-1α, and the protein level of VEGF and p-eNOS.
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16
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Muscari C, Bonafè F, Martin-Suarez S, Valgimigli S, Valente S, Fiumana E, Fiorelli F, Rubini G, Guarnieri C, Caldarera CM, Capitani O, Arpesella G, Pasquinelli G. Restored perfusion and reduced inflammation in the infarcted heart after grafting stem cells with a hyaluronan-based scaffold. J Cell Mol Med 2013; 17:518-30. [PMID: 23480821 PMCID: PMC3822652 DOI: 10.1111/jcmm.12039] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2012] [Accepted: 01/18/2013] [Indexed: 12/01/2022] Open
Abstract
The aim of this study is to investigate the blood perfusion and the inflammatory response of the myocardial infarct area after transplanting a hyaluronan-based scaffold (HYAFF(®) 11) with bone marrow mesenchymal stem cells (MSCs). Nine-week-old female pigs were subjected to a permanent left anterior descending coronary artery ligation for 4 weeks. According to the kind of the graft, the swine subjected to myocardial infarction were divided into the HYAFF(®) 11, MSCs, HYAFF(®) 11/MSCs and untreated groups. The animals were killed 8 weeks after coronary ligation. Scar perfusion, evaluated by Contrast Enhanced Ultrasound echography, was doubled in the HYAFF(®) 11/MSCs group and was comparable with the perfusion of the healthy, non-infarcted hearts. The inflammation score of the MSCs and HYAFF(®) 11/MSCs groups was near null, revealing the role of the grafted MSCs in attenuating the cell infiltration, but not the foreign reaction strictly localized around the fibres of the scaffold. Apart from the inflammatory response, the native tissue positively interacted with the HYAFF(®) 11/MSCs construct modifying the extracellular matrix with a reduced presence of collagene and increased amount of proteoglycans. The border-zone cardiomyocytes also reacted favourably to the graft as a lower degree of cellular damage was found. This study demonstrates that the transplantation in the myocardial infarct area of autologous MSCs supported by a hyaluronan-based scaffold restores blood perfusion and almost completely abolishes the inflammatory process following an infarction. These beneficial effects are superior to those obtained after grafting only the scaffold or MSCs, suggesting that a synergic action was achieved using the cell-integrated polymer construct.
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Affiliation(s)
- Claudio Muscari
- Department of Biochemistry, University of Bologna, Bologna 40126, Italy.
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Abstract
SIGNIFICANCE Proangiogenic therapy appeared a promising strategy for the treatment of patients with acute myocardial infarction (MI), as de novo formation of microvessels, has the potential to salvage ischemic myocardium at early stages after MI, and is also essential to prevent the transition to heart failure through the control of cardiomyocyte hypertrophy and contractility. RECENT ADVANCES Exciting preclinical studies evaluating proangiogenic therapies for MI have prompted the initiation of numerous clinical trials based on protein or gene transfer delivery of growth factors and administration of stem/progenitor cells, mainly from bone marrow origin. Nonetheless, these clinical trials showed mixed results in patients with acute MI. CRITICAL ISSUES Even though methodological caveats, such as way of delivery for angiogenic growth factors (e.g., protein vs. gene transfer) and stem/progenitor cells or isolation/culture procedure for regenerative cells might partially explain the failure of such trials, it appears that delivery of a single growth factor or cell type does not support angiogenesis sufficiently to promote cardiac repair. FUTURE DIRECTIONS Optimization of proangiogenic therapies might include stimulation of both angiogenesis and vessel maturation and/or the use of additional sources of stem/progenitor cells, such as cardiac progenitor cells. Experimental unraveling of the mechanisms of angiogenesis, vessel maturation, and endothelial cell/cardiomyocyte cross talk in the ischemic heart, analysis of emerging pathways, as well as a better understanding of how cardiovascular risk factors impact endogenous and therapeutically stimulated angiogenesis, would undoubtedly pave the way for the development of novel and hopefully efficient angiogenesis targeting therapeutics for the treatment of acute MI.
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Affiliation(s)
- Clement Cochain
- Paris Cardiovascular Research Center, INSERM UMR-S 970, Paris Descartes University, Paris, France
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18
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Regulation of angiogenesis by hypoxia: the role of microRNA. Cell Mol Biol Lett 2012; 18:47-57. [PMID: 23124858 PMCID: PMC3874716 DOI: 10.2478/s11658-012-0037-0] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2012] [Accepted: 10/24/2012] [Indexed: 12/22/2022] Open
Abstract
Understanding the cellular pathways that regulate angiogenesis during hypoxia is a necessary aspect in the development of novel treatments for cardiovascular disorders. Although the pathways of angiogenesis have been extensively studied, there is limited information on the role of miRNAs in this process. miRNAs or their antagomirs could be used in future therapeutic approaches to regulate hypoxia-induced angiogenesis, so it is critical to understand their role in governing angiogenesis during hypoxic conditions. Although hypoxia and ischemia change the expression profile of many miRNAs, a functional role for a limited number of so-called hypoxamiRs has been demonstrated in angiogenesis. Here, we discuss the best examples that illustrate the role of hypoxamiRs in angiogenesis.
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Ruvinov E, Sapir Y, Cohen S. Cardiac Tissue Engineering: Principles, Materials, and Applications. ACTA ACUST UNITED AC 2012. [DOI: 10.2200/s00437ed1v01y201207tis009] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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20
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Yuan MJ, He-Huang, Hu HY, Li-Quan, Hong-Jiang, Huang CX. Myocardial angiogenesis after chronic ghrelin treatment in a rat myocardial infarction model. ACTA ACUST UNITED AC 2012; 179:39-42. [PMID: 22960289 DOI: 10.1016/j.regpep.2012.08.013] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2012] [Revised: 07/23/2012] [Accepted: 08/29/2012] [Indexed: 10/27/2022]
Abstract
Ghrelin has a protective role in a rat model of myocardial infarction (MI), but the underlying mechanism is not clear. Here, we investigated the effects of ghrelin treatment on angiogenesis in an experimental rat MI model. Adult male Sprague-Dawley rats were subjected to MI by ligating the anterior descending coronary artery. The rats were then treated with a subcutaneous injection of ghrelin (100 μg/kg) or saline (control group) for 4 weeks. Sham animals underwent thoracotomy and pericardiotomy, but not LAD ligation. At 28 days after ligation, the ghrelin treatment group showed a higher density of α-SMA positive vessels than the saline treatment MI group in myocardial infarct (6±2.1/mm(2) vs 4±1.8/mm(2), P<0.05) and peri-infarct zones (25±9.5/mm(2) vs 15±5.7/mm(2), P<0.05). RT-PCR and western-blot analyses showed that ghrelin significantly increased vascular endothelial growth factor (VEGF) expression in the peri-infarct zone compared with the control group. Moreover, there was a two-fold increase of Bcl-2 and a 3.5-fold reduction of the Bax protein in the ghrelin-treated MI group compared to the saline treatment MI group. Taken together, ghrelin could induce angiogenesis in rats after MI, the process that may be associated with the enhancement of VEGF and an anti-apoptosis effect.
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Affiliation(s)
- Ming-Jie Yuan
- Department of Cardiology, Renmin Hospital of Wuhan University, Wuhan 430060, PR China.
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Zhao H, Yan H, Yamashita S, Li W, Liu C, Chen Y, Zhou P, Chi Y, Wang S, Zhao B, Song L. Acute ST-segment elevation myocardial infarction is associated with decreased human antimicrobial peptide LL-37 and increased human neutrophil peptide-1 to 3 in plasma. J Atheroscler Thromb 2011; 19:357-68. [PMID: 22186100 DOI: 10.5551/jat.10108] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022] Open
Abstract
AIM Increasing evidence indicates that antimicrobial peptides, human neutrophil peptide-1, -2, and -3 (HNP1-3) and human antimicrobial peptide LL-37 are involved in the pathophysiology of atherosclerosis; however, little is known about their circulating protein levels in acute myocardial infarction (AMI). We therefore investigated whether their plasma levels are associated with stable coronary artery disease (CAD) and acute ST-segment elevation myocardial infarction (STEMI). METHODS Systemic or local (culprit artery) blood samples were obtained from 112 consecutive male subjects including no CAD (n = 31) controls, stable CAD (n = 44) and STEMI (n = 47). Plasma HNP1-3 and LL-37 levels were measured by the ready-to-use solid-phase enzyme-linked immunosorbent assay (ELISA) based on the sandwich principle. RESULTS Systemic HNP1-3 in STEMI was increased compared with no CAD (p = 0.000) and stable CAD (p = 0.008), and systemic HNP1-3 in stable CAD was higher than in no CAD (p = 0.004). Systemic LL-37 in STEMI was decreased compared with no CAD (p = 0.009) and stable CAD (p =0.001) and restored within 1 day following STEMI (p = 0.000). Local LL-37 levels in STEMI were higher than systemic levels (p = 0.013). The areas under the ROC curve of systemic HNP1-3 and LL-37 for STEMI were 0.717 (95% CI: 0.624, 0.811; p = 0.000) and 0.702 (95% CI: 0.609, 0.795; p = 0.000), respectively. In addition, ischemia time in the STEMI group correlated with systemic and local levels of HNP1-3 (rs = -0.360, p = 0.013; rs = 0.608, p = 0.000, respectively), and was also associated with systemic and local levels of hs-CRP (rs = 0.408, p = 0.004; rs = 0.425, p = 0.003, respectively), but not with those of LL-37 (all p > 0.05). CONCLUSION STEMI was associated with transiently decreased LL-37, but persistently increased HNP1-3 in the systemic circulation and the diagnostic accuracy for STEMI were moderate. Future studies should pay more attention to their prognostic values for myocardial infarction.
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Affiliation(s)
- Hanjun Zhao
- State Key Laboratory of Cadiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, No. 167 Beilishi Road, Beijing, China
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Nediani C, Raimondi L, Borchi E, Cerbai E. Nitric oxide/reactive oxygen species generation and nitroso/redox imbalance in heart failure: from molecular mechanisms to therapeutic implications. Antioxid Redox Signal 2011; 14:289-331. [PMID: 20624031 DOI: 10.1089/ars.2010.3198] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Adaptation of the heart to intrinsic and external stress involves complex modifications at the molecular and cellular levels that lead to tissue remodeling, functional and metabolic alterations, and finally to failure depending upon the nature, intensity, and chronicity of the stress. Reactive oxygen species (ROS) have long been considered as merely harmful entities, but their role as second messengers has gradually emerged. At the same time, our comprehension of the multifaceted role of nitric oxide (NO) and the related reactive nitrogen species (RNS) has been upgraded. The tight interlay between ROS and RNS suggests that their imbalance may implicate the impairment in physiological NO/redox-based signaling that contributes to the failing of the cardiovascular system. This review initially provides basic concepts on the role of nitroso/oxidative stress in the pathophysiology of heart failure with a particular focus on sources of ROS/RNS, their downstream targets, and endogenous modulators. Then, the role of NO/redox regulation of cardiomyocyte function, including calcium homeostasis, electrogenesis, and insulin signaling pathways, is described. Finally, an overview of old and emerging therapeutic opportunities in heart failure is presented, focusing on modulation of NO/redox mechanisms and discussing benefits and limitations.
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Affiliation(s)
- Chiara Nediani
- Department of Biochemical Sciences, University of Florence, Florence, Italy.
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Ruvinov E, Leor J, Cohen S. The effects of controlled HGF delivery from an affinity-binding alginate biomaterial on angiogenesis and blood perfusion in a hindlimb ischemia model. Biomaterials 2010; 31:4573-82. [PMID: 20206988 DOI: 10.1016/j.biomaterials.2010.02.026] [Citation(s) in RCA: 128] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2010] [Accepted: 02/10/2010] [Indexed: 01/09/2023]
Abstract
Enhancing tissue self-repair through the use of active acellular biomaterials is one of the main goals of regenerative medicine. We now describe the features of an injectable alginate biomaterial designed to affinity-bind heparin-binding proteins and release them at a rate reflected by their association constant to alginate-sulfate. The interactions of hepatocyte growth factor (HGF) with alginate-sulfate resulted in factor protection from proteolysis, as shown by mass spectroscopy analysis after trypsin digestion. When the HGF/alginate-sulfate bioconjugate was incorporated into alginate hydrogel, HGF release was sustained by a factor of 3, as compared to the release rate from non-modified hydrogel. The released factor retained activity, as shown by its induction of ERK1/2 activation and affording cytoprotection in rat neonatal cardiomyocyte cultures. In vivo, an injectable form of the affinity-binding alginate system extended by 10-fold, as compared to a saline-treated group, retention of HGF in myocardial tissue when delivered immediately after myocardial infarction. In a severe murine hindlimb ischemia model, HGF delivery from the affinity-binding system improved tissue blood perfusion and induced mature blood vessel network formation. The therapeutic efficacy of the affinity-binding system, as well as its ease of delivery by injection, provides a proof-of-concept for the potential use of this bioactive biomaterial strategy in cardiovascular repair.
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Affiliation(s)
- Emil Ruvinov
- Avram and Stella Goldstein-Goren Department of Biotechnology Engineering, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel
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