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Wu L, Niu L, Yang Z, Xia Q, Xu J, Lu X. RNA N6‑methyladenosine methyltransferase WTAP promotes the differentiation of endothelial progenitor cells. Exp Ther Med 2023; 26:420. [PMID: 37602313 PMCID: PMC10433437 DOI: 10.3892/etm.2023.12119] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Accepted: 06/23/2023] [Indexed: 08/22/2023] Open
Abstract
N6-methyladenosine (m6A) serves a critical role in regulating gene expression and has been associated with various diseases; however, its role in the differentiation of endothelial progenitor cells (EPCs) remains unclear. The present study used liquid chromatography with tandem mass spectrometry and immunofluorescence assays to quantify the levels of m6A in human peripheral blood-derived EPCs (HPB-EPCs) before and after differentiation into mature cells. The present study performed Cell Counting Kit 8, Transwell, and tube formation assays to determine the effects of overexpression and knockdown of Wilms' tumor 1-associated protein (WTAP) on HPB-EPCs. The results revealed that the level of m6A modification was significantly increased during HPB-EPCs differentiation, and WTAP exhibited the most significant alteration among the enzymes involved in m6A regulation. When WTAP was overexpressed in HPB-EPCs, cell proliferation, invasion, and the formation of tubes were improved, whereas WTAP knockdown yielded the opposite effects. In conclusion, the present study highlighted the involvement of m6A in regulating EPC differentiation, with WTAP acting as a promoter of EPC differentiation.
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Affiliation(s)
- Longyun Wu
- Department of Gastroenterology, Fudan University Pudong Medical Center, Shanghai 201399, P.R. China
| | - Lili Niu
- Department of Gastroenterology, Fudan University Pudong Medical Center, Shanghai 201399, P.R. China
- Central Laboratory, First Affiliated Hospital of Dalian Medical University, Dalian, Liaoning 116021, P.R. China
- Institute of Integrative Medicine, Dalian Medical University, Dalian, Liaoning 116021, P.R. China
| | - Zhou Yang
- Department of Gastroenterology, Fudan University Pudong Medical Center, Shanghai 201399, P.R. China
- Department of Cardiovascular Surgery, Fudan University Shanghai Cancer Center, Shanghai 200120, P.R. China
| | - Qiaoyun Xia
- Department of Gastroenterology, Fudan University Pudong Medical Center, Shanghai 201399, P.R. China
| | - Jingyuan Xu
- Department of Gastroenterology, Fudan University Pudong Medical Center, Shanghai 201399, P.R. China
- Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
| | - Xiaolan Lu
- Department of Gastroenterology, Fudan University Pudong Medical Center, Shanghai 201399, P.R. China
- Department of Gastroenterology, The Second Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi 710004, P.R. China
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Obesity and Wound Healing: Focus on Mesenchymal Stem Cells. Life (Basel) 2023; 13:life13030717. [PMID: 36983872 PMCID: PMC10059997 DOI: 10.3390/life13030717] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2023] [Revised: 02/20/2023] [Accepted: 03/03/2023] [Indexed: 03/09/2023] Open
Abstract
Chronic wounds represent nowadays a major challenge for both clinicians and researchers in the regenerative setting. Obesity represents one of the major comorbidities in patients affected by chronic ulcers and therefore diverse studies aimed at assessing possible links between these two morbid conditions are currently ongoing. In particular, adipose tissue has recently been described as having metabolic and endocrine functions rather than serving as a mere fat storage deposit. In this setting, adipose-derived stem cells, a peculiar subset of mesenchymal stromal/stem cells (MSCs) located in adipose tissue, have been demonstrated to possess regenerative and immunological functions with a key role in regulating both adipocyte function and skin regeneration. The aim of the present review is to give an overview of the most recent findings on wound healing, with a special focus on adipose tissue biology and obesity.
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Turrioni AP, Oliveira Neto NFD, Xu Y, Morse L, Costa CADS, Battaglino R, Hebling J. Proliferation rate and expression of stem cells markers during expansion in primary culture of pulp cells. Braz Oral Res 2021; 35:e128. [PMID: 34878083 DOI: 10.1590/1807-3107bor-2021.vol35.0128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 05/03/2021] [Indexed: 11/22/2022] Open
Abstract
The aim of the present study was to evaluate the proliferation rate and the expression of stem cells markers during expansion in primary culture of dental pulp stem cells (DPSCs), comparing different techniques (explant and enzymatic digestion), subject ages (up to 40 and over 40) and cell passages (#2, #5 and #8). DPSCs were isolated using either the enzymatic digestion (ED) or explant (EX) technique. The number of days needed for the cells to reach confluence was determined. Immunophenotyping was performed by immunofluorescence and flow cytometry analysis using antibodies specific for nestin, vimentin, CD44, CD146, Oct3/4 and CD34. Data were subjected to three-way analysis of variance (n = 6/group). The ANOVA tests were complemented by Tukey's or t-tests (p < 0.05). The variables "donor age" and "technique" were analyzed to define the optimal desirability value using a response optimization. DPSCs presented a high proliferation rate from passages 2 to 5 while cells from passage 8 proliferated at a slower rate. For all markers, no significant difference was observed among passages, irrespective of the technique used or the donor's age. The mean fraction of specific antibodies was 73.7% (± 11.5), 49.0% (± 18.7), 80.1% (± 8.0), 45.2% (± 13.7), 64.7% (± 5.3) and 2.0% (± 1.5) for CD44, OCT, vimentin, nestin, CD146 and CD34, respectively. The highest optimal desirability value was obtained using the ED technique and cells from younger patients (d = 0.92). However, it was concluded that neither the isolation technique nor the donor age or cell passage significantly interfered with the stem cell phenotype and proliferation rate during cell expansion.
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Affiliation(s)
- Ana Paula Turrioni
- Universidade Federal de Uberlândia - UFU, School of Dentistry, Department of Pediatric Dentistry, Uberlandia, MG, Brazil
| | | | - Yan Xu
- The Forsyth Institute, Department of Mineralized Tissue Biology, Cambridge MA, USA
| | - Leslie Morse
- University of Minnesota, School of Medicine, Department of Rehabilitation Medicine, Minneapolis, MI, USA
| | - Carlos Alberto de Souza Costa
- Universidade Estadual Paulista - Unesp, School of Dentistry, Department of Physiology and Pathology, Araraquara, SP, Brazil
| | - Ricardo Battaglino
- University of Minnesota, School of Medicine, Department of Rehabilitation Medicine, Minneapolis, MI, USA
| | - Josimeri Hebling
- Universidade Estadual Paulista - Unesp, School of Dentistry, Department of Orthodontics and Pediatric Dentistry, Araraquara, Brazil
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Moxibustion therapy improving delayed memory deficits via promoting neurogenesis and angiogenesis of hippocampus in a vascular dementia rat model. JOURNAL OF ACUPUNCTURE AND TUINA SCIENCE 2019. [DOI: 10.1007/s11726-019-1140-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Koch M, Hammer S, Fuellerer J, Lang S, Pfeifer CG, Pattappa G, Weber J, Loibl M, Nerlich M, Angele P, Zellner J. Bone Marrow Aspirate Concentrate for the Treatment of Avascular Meniscus Tears in a One-Step Procedure-Evaluation of an In Vivo Model. Int J Mol Sci 2019; 20:ijms20051120. [PMID: 30841560 PMCID: PMC6429139 DOI: 10.3390/ijms20051120] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2019] [Revised: 02/25/2019] [Accepted: 02/26/2019] [Indexed: 12/11/2022] Open
Abstract
Avascular meniscus tears show poor intrinsic regenerative potential. Thus, lesions within this area predispose the patient to developing knee osteoarthritis. Current research focuses on regenerative approaches using growth factors or mesenchymal stem cells (MSCs) to enhance healing capacity within the avascular meniscus zone. The use of MSCs especially as progenitor cells and a source of growth factors has shown promising results. However, present studies use bone-marrow-derived BMSCs in a two-step procedure, which is limiting the transfer in clinical praxis. So, the aim of this study was to evaluate a one-step procedure using bone marrow aspirate concentrate (BMAC), containing BMSCs, for inducing the regeneration of avascular meniscus lesions. Longitudinal meniscus tears of 4 mm in size of the lateral New Zealand White rabbit meniscus were treated with clotted autologous PRP (platelet-rich plasma) or BMAC and a meniscus suture or a meniscus suture alone. Menisci were harvested at 6 and 12 weeks after initial surgery. Macroscopical and histological evaluation was performed according to an established Meniscus Scoring System. BMAC significantly enhanced regeneration of the meniscus lesions in a time-dependent manner and in comparison to the PRP and control groups, where no healing could be observed. Treatment of avascular meniscus lesions with BMAC and meniscus suturing seems to be a promising approach to promote meniscus regeneration in the avascular zone using a one-step procedure.
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Affiliation(s)
- Matthias Koch
- Department of Trauma Surgery, University Medical Centre Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany.
| | - Selma Hammer
- Department of Trauma Surgery, University Medical Centre Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany.
| | - Julian Fuellerer
- Department of Trauma Surgery, University Medical Centre Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany.
| | - Siegmund Lang
- Department of Trauma Surgery, University Medical Centre Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany.
| | - Christian G Pfeifer
- Department of Trauma Surgery, University Medical Centre Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany.
| | - Girish Pattappa
- Laboratory of Experimental Trauma Surgery, Department of Trauma Surgery, University Medical Centre Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany.
| | - Johannes Weber
- Department of Trauma Surgery, University Medical Centre Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany.
| | - Markus Loibl
- Department of Trauma Surgery, University Medical Centre Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany.
| | - Michael Nerlich
- Department of Trauma Surgery, University Medical Centre Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany.
| | - Peter Angele
- Department of Trauma Surgery, University Medical Centre Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany.
- Sporthopaedicum Regensburg/Straubing, Hildegard-von-Bingen-Str. 1, 93053, Regensburg, Germany.
| | - Johannes Zellner
- Department of Trauma Surgery, University Medical Centre Regensburg, Franz-Josef-Strauss-Allee 11, 93053 Regensburg, Germany.
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Koch M, Ehrenreich T, Koehl G, Pattappa G, Pfeifer C, Loibl M, Müller M, Nerlich M, Angele P, Zellner J. Do cell based tissue engineering products for meniscus regeneration influence vascularization? Clin Hemorheol Microcirc 2017; 67:125-140. [DOI: 10.3233/ch-17085] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Matthias Koch
- Department of Trauma Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - Tobias Ehrenreich
- Department of Trauma Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - Gudrun Koehl
- Department of Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - Girish Pattappa
- Department of Trauma Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - Christian Pfeifer
- Department of Trauma Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - Markus Loibl
- Department of Trauma Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - Michael Müller
- Department of Trauma Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - Michael Nerlich
- Department of Trauma Surgery, University Medical Center Regensburg, Regensburg, Germany
| | - Peter Angele
- Department of Trauma Surgery, University Medical Center Regensburg, Regensburg, Germany
- Sporthopaedicum Regensburg/Straubing, Regensburg, Germany
| | - Johannes Zellner
- Department of Trauma Surgery, University Medical Center Regensburg, Regensburg, Germany
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Zhang H, Tao Y, Ren S, Liu H, Zhou H, Hu J, Tang Y, Zhang B, Chen H. Isolation and characterization of human umbilical cord-derived endothelial colony-forming cells. Exp Ther Med 2017; 14:4160-4166. [PMID: 29067104 PMCID: PMC5647737 DOI: 10.3892/etm.2017.5035] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2016] [Accepted: 03/31/2017] [Indexed: 12/30/2022] Open
Abstract
Endothelial colony-forming cells (ECFCs) are a population of endothelial progenitor cells (EPCs) that display robust proliferative potential and vessel-forming capability. Previous studies have demonstrated that a limited number of ECFCs may be obtained from adult bone marrow, peripheral blood and umbilical cord (UC) blood. The present study describes an effective method for isolating ECFCs from human UC. The ECFCs derived from human UC displayed the full properties of EPCs. Analysis of the growth kinetics, cell cycle and colony-forming ability of the isolated human UC-ECFCs indicated that the cells demonstrated properties of stem cells, including relative stability and rapid proliferation in vitro. Gene expression of Fms related tyrosine kinase 1, kinase insert domain receptor, vascular endothelial cadherin, cluster of differentiation (CD)31, CD34, epidermal growth factor homology domains-2, von Willebrand factor and endothelial nitric oxide synthase was assessed by reverse transcription-polymerase chain reaction. The cells were positive for CD34, CD31, CD73, CD105 and vascular endothelial growth factor receptor-2, and negative for CD45, CD90 and human leukocyte antigen-antigen D related protein according to flow cytometry. 1,1'-dioctadecyl-3,3,3',3'-tetra-methyl-indocarbocyanine perchlorate-labeled acetylated low-density lipoprotein and fluorescein isothiocyanate-Ulex europaeus-l were used to verify the identity of the UC-ECFCs. Matrigel was used to investigate tube formation capability. The results demonstrated that the reported technique is a valuable method for isolating human UC-ECFCs, which have potential for use in vascular regeneration.
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Affiliation(s)
- Hao Zhang
- Department of Hematopoietic Stem Cell Transplantation, Affiliated Hospital of Academy of Military Medical Sciences, Beijing 100071, P.R. China.,Department of Hematology, Affiliated Hospital of Jining Medical University, Jining, Shandong 272000, P.R. China
| | - Yanling Tao
- Department of Hematology, Affiliated Hospital of Jining Medical University, Jining, Shandong 272000, P.R. China
| | - Saisai Ren
- Department of Graduate School, Jining Medical University, Jining, Shandong 272000, P.R. China
| | - Haihui Liu
- Department of Graduate School, Jining Medical University, Jining, Shandong 272000, P.R. China
| | - Hui Zhou
- Department of Hematology, Affiliated Hospital of Jining Medical University, Jining, Shandong 272000, P.R. China
| | - Jiangwei Hu
- Department of Hematopoietic Stem Cell Transplantation, Affiliated Hospital of Academy of Military Medical Sciences, Beijing 100071, P.R. China
| | - Yongyong Tang
- Department of Hematopoietic Stem Cell Transplantation, Affiliated Hospital of Academy of Military Medical Sciences, Beijing 100071, P.R. China.,Cell and Gene Therapy Center, Academy of Military Medical Sciences, Beijing 100071, P.R. China
| | - Bin Zhang
- Department of Hematopoietic Stem Cell Transplantation, Affiliated Hospital of Academy of Military Medical Sciences, Beijing 100071, P.R. China.,Cell and Gene Therapy Center, Academy of Military Medical Sciences, Beijing 100071, P.R. China
| | - Hu Chen
- Department of Hematopoietic Stem Cell Transplantation, Affiliated Hospital of Academy of Military Medical Sciences, Beijing 100071, P.R. China.,Cell and Gene Therapy Center, Academy of Military Medical Sciences, Beijing 100071, P.R. China
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3D-Printed PCL Scaffolds for the Cultivation of Mesenchymal Stem Cells. J Appl Biomater Funct Mater 2016; 14:e19-25. [DOI: 10.5301/jabfm.5000252] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 05/31/2015] [Indexed: 11/20/2022] Open
Abstract
Introduction Tissue engineering is a field which is currently under a great deal of investigation for the development and/or restoration of tissue and organs, through the combination of cell therapy with biomaterials. Rapid prototyping or additive manufacturing is a versatile technology which makes possible the fabrication of three dimensional (3D) structures from a wide range of materials with complex geometry and accuracy, such as scaffolds. Aim The aim of this study has been to investigate the interaction between mesenchymal stem cells with poly (ε-caprolactone) (PCL) biomaterials used for obtaining scaffolds through additive manufacturing. Materials and Methods Scanning electron microscopy, confocal microscopy and biological assays were performed to analyse the successful interaction between the cells and the biomaterials. Results As a result, the number of viable cells attached to the scaffolds was lower when compared to the control group; however, it was possible to observe cells in the scaffolds since day 1 of analysis, with regions of confluence after 21 days of seeding. Conclusions To conclude, these biomaterials are interesting if used as medical artifacts, principally in tissue with prolonged regeneration time and which requires 3D supports with good mechanical properties.
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Lee S, Kim W, Park J, Jang HH, Lee SM, Woo JS, Kim HS, Lee KH, Kwon YJ, Lee U, Kim JB, Kim WS, Kim KS. Effects of electroacupuncture on endothelial function and circulating endothelial progenitor cells in patients with cerebral infarction. Clin Exp Pharmacol Physiol 2015; 42:822-7. [DOI: 10.1111/1440-1681.12413] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2015] [Revised: 04/12/2015] [Accepted: 04/20/2015] [Indexed: 01/24/2023]
Affiliation(s)
- Sanghoon Lee
- Department of Acupuncture and Moxibustion; College of Korean Medicine; Kyung Hee University; Seoul Korea
| | - Weon Kim
- Division of Cardiology; Department of Internal Medicine; Kyung Hee University Hospital; Seoul Korea
| | - Jimin Park
- Department of Acupuncture and Moxibustion; College of Korean Medicine; Kyung Hee University; Seoul Korea
| | - Hyun Hee Jang
- Division of Cardiology; Department of Internal Medicine; Kyung Hee University Hospital; Seoul Korea
| | - Seung Min Lee
- Department of Acupuncture and Moxibustion; College of Korean Medicine; Kyung Hee University; Seoul Korea
| | - Jong Shin Woo
- Division of Cardiology; Department of Internal Medicine; Kyung Hee University Hospital; Seoul Korea
| | - Hyun Soo Kim
- Division of Cardiology; Department of Internal Medicine; Kyung Hee University Hospital; Seoul Korea
| | - Kyung Hye Lee
- Division of Cardiology; Department of Internal Medicine; Kyung Hee University Hospital; Seoul Korea
| | - You-Jung Kwon
- Department of Acupuncture and Moxibustion; College of Korean Medicine; Kyung Hee University; Seoul Korea
| | - Ungin Lee
- Department of Acupuncture and Moxibustion; College of Korean Medicine; Kyung Hee University; Seoul Korea
| | - Jin Bae Kim
- Division of Cardiology; Department of Internal Medicine; Kyung Hee University Hospital; Seoul Korea
| | - Woo Shik Kim
- Division of Cardiology; Department of Internal Medicine; Kyung Hee University Hospital; Seoul Korea
| | - Kwon Sam Kim
- Division of Cardiology; Department of Internal Medicine; Kyung Hee University Hospital; Seoul Korea
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Mesenchymal stem cells overexpressing integrin-linked kinase attenuate left ventricular remodeling and improve cardiac function after myocardial infarction. Mol Cell Biochem 2014; 397:203-14. [PMID: 25134935 DOI: 10.1007/s11010-014-2188-y] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2014] [Accepted: 08/08/2014] [Indexed: 01/26/2023]
Abstract
In the present study, we investigated whether mesenchymal stem cells (MSCs) overexpressing integrin-linked kinase (ILK) might regulate ventricular remodeling and cardiac function in a porcine myocardial infarction model. ILK-modified MSCs (ILK-MSCs) (n = 8), MSCs (n = 8) or placebo (n = 8) were injected into peri-infarct myocardium 7 days after ligation of the left anterior descending coronary artery. ILK expression was confirmed by immunofluorescence, real-time PCR, Western blot analysis, and flow cytometry. In vitro assays indicated increased proliferation and reduced apoptosis of MSCs due to overexpression of ILK. Echocardiographic, single-photon emission computed tomography and positron emission tomography analyses demonstrated preserved cardiac function and myocardial perfusion. Reduced fibrosis, increased cardiomyocyte proliferation, and enhanced angiogenesis were observed in the ILK-MSC group. Reduced apoptosis, as demonstrated by terminal deoxynucleotidyl transferase-mediated dUTP nick-end labeling analysis, was also noted. In conclusion, ILK promotes MSC proliferation and suppresses apoptosis. ILK-MSC transplantation improves ventricular remodeling and cardiac function in pigs after MI. It is associated with increased angiogenesis, reduced apoptosis, and increased cardiomyocyte proliferation. This may represent a new approach to the treatment of post-infarct remodeling and subsequent heart failure.
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Steffens D, Leonardi D, Soster PRDL, Lersch M, Rosa A, Crestani T, Scher C, de Morais MG, Costa JAV, Pranke P. Development of a new nanofiber scaffold for use with stem cells in a third degree burn animal model. Burns 2014; 40:1650-60. [PMID: 24794225 DOI: 10.1016/j.burns.2014.03.008] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2013] [Revised: 02/12/2014] [Accepted: 03/10/2014] [Indexed: 12/11/2022]
Abstract
The combination of mesenchymal stem cells (MSCs) and nanotechnology to promote tissue engineering presents a strategy for the creation of new substitutes for tissues. Aiming at the utilization of the scaffolds of poly-d,l-lactic acid (PDLLA) associated or not with Spirulina biomass (PDLLA/Sp) in skin wounds, MSCs were seeded onto nanofibers produced by electrospinning. These matrices were evaluated for morphology and fiber diameter by scanning electron microscopy and their interaction with the MSCs by confocal microscopy analysis. The biomaterials were implanted in mice with burn imitating skin defects for up to 7 days and five groups were studied for healing characteristics. The scaffolds demonstrated fibrous and porous structures and, when implanted in the animals, they tolerated mechanical stress for up to two weeks. Seven days after the induction of lesions, a similar presence of ulceration, inflammation and fibrosis among all the treatments was observed. No group showed signs of re-epithelization, keratinization or presence of hair follicles on the lesion site. In conclusion, although there was no microscopical difference among all the groups, it is possible that more prolonged analysis would show different results. Moreover, the macroscopic analysis of the groups with the scaffolds showed better cicatrization in comparison with the control group.
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Affiliation(s)
- Daniela Steffens
- Hematology and Stem Cell Laboratory, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Brazil; Post Graduate Program in Physiology, Federal University of Rio Grande do Sul, Brazil.
| | - Dilmar Leonardi
- Hematology and Stem Cell Laboratory, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Brazil
| | | | - Michelle Lersch
- Hematology and Stem Cell Laboratory, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Brazil
| | - Annelise Rosa
- Hematology and Stem Cell Laboratory, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Brazil; Post Graduate Program in Physiology, Federal University of Rio Grande do Sul, Brazil
| | - Thayane Crestani
- Hematology and Stem Cell Laboratory, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Brazil
| | - Cristiane Scher
- Hematology and Stem Cell Laboratory, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Brazil
| | - Michele Greque de Morais
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Brazil
| | - Jorge Alberto Vieira Costa
- Laboratory of Biochemical Engineering, College of Chemistry and Food Engineering, Federal University of Rio Grande, Brazil
| | - Patricia Pranke
- Hematology and Stem Cell Laboratory, Faculty of Pharmacy, Federal University of Rio Grande do Sul, Brazil; Post Graduate Program in Physiology, Federal University of Rio Grande do Sul, Brazil; Stem Cell Research Institute, Brazil
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van Vliet P, Sluijter JPG, Doevendans PA, Goumans MJ. Isolation and expansion of resident cardiac progenitor cells. Expert Rev Cardiovasc Ther 2014; 5:33-43. [PMID: 17187455 DOI: 10.1586/14779072.5.1.33] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
After myocardial infarction, loss of viable cardiomyocytes severely impairs cardiac function. Recently, stem cell transplantation has been put forward as a promising approach to repair the damaged heart. Although several clinical trials have already been performed, the dominant beneficial effects are probably due to neoangiogenesis and arteriogenesis. However, replacement of cardiomyocytes is vital to improve cardiac function in the long term. Stem cells and progenitor cells, with the capacity to differentiate into cardiomyocytes, have been described in both embryonic and adult tissues. Upon stimulation, cardiac progenitor cells proliferate and differentiate into cardiomyocytes, vascular smooth muscle cells, and endothelial cells. Currently however, high proliferation rates and differentiation of cardiac progenitor cells beyond the fetal stage have not yet been achieved. Full differentiation into adult cardiomyocytes in vitro and in vivo might be important for efficient integration with the host environment and therefore more research is needed to study factors that influence proliferation and differentiation. Here we will discuss the isolation of cardiac progenitor cells, their potential to differentiate into various cell types needed for cardiac repair, the possible mechanisms behind these events, and how these cells may be implemented in future clinical settings.
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Affiliation(s)
- Patrick van Vliet
- The Interuniversity Cardiology Institute of The Netherlands, Utrecht, The Netherlands.
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Naderi H, Matin MM, Bahrami AR. Review paper: Critical Issues in Tissue Engineering: Biomaterials, Cell Sources, Angiogenesis, and Drug Delivery Systems. J Biomater Appl 2011; 26:383-417. [DOI: 10.1177/0885328211408946] [Citation(s) in RCA: 210] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Tissue engineering is a newly emerging biomedical technology, which aids and increases the repair and regeneration of deficient and injured tissues. It employs the principles from the fields of materials science, cell biology, transplantation, and engineering in an effort to treat or replace damaged tissues. Tissue engineering and development of complex tissues or organs, such as heart, muscle, kidney, liver, and lung, are still a distant milestone in twenty-first century. Generally, there are four main challenges in tissue engineering which need optimization. These include biomaterials, cell sources, vascularization of engineered tissues, and design of drug delivery systems. Biomaterials and cell sources should be specific for the engineering of each tissue or organ. On the other hand, angiogenesis is required not only for the treatment of a variety of ischemic conditions, but it is also a critical component of virtually all tissue-engineering strategies. Therefore, controlling the dose, location, and duration of releasing angiogenic factors via polymeric delivery systems, in order to ultimately better mimic the stem cell niche through scaffolds, will dictate the utility of a variety of biomaterials in tissue regeneration. This review focuses on the use of polymeric vehicles that are made of synthetic and/or natural biomaterials as scaffolds for three-dimensional cell cultures and for locally delivering the inductive growth factors in various formats to provide a method of controlled, localized delivery for the desired time frame and for vascularized tissue-engineering therapies.
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Affiliation(s)
- Hojjat Naderi
- Department of Biology, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Maryam M. Matin
- Department of Biology, Ferdowsi University of Mashhad, Mashhad, Iran
- Cell and Molecular Biology Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran
| | - Ahmad Reza Bahrami
- Department of Biology, Ferdowsi University of Mashhad, Mashhad, Iran
- Cell and Molecular Biology Research Group, Institute of Biotechnology, Ferdowsi University of Mashhad, Mashhad, Iran
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Napoli C, Hayashi T, Cacciatore F, Casamassimi A, Casini C, Al-Omran M, Ignarro LJ. Endothelial progenitor cells as therapeutic agents in the microcirculation: an update. Atherosclerosis 2010; 215:9-22. [PMID: 21126740 DOI: 10.1016/j.atherosclerosis.2010.10.039] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/03/2010] [Revised: 09/28/2010] [Accepted: 10/25/2010] [Indexed: 12/15/2022]
Abstract
This review evaluates novel beneficial effects of circulating endothelial progenitor cells (EPCs) as shown by several preclinical studies and clinical trials carried out to test the safety and feasibility of using EPCs. There are 31 registered clinical trials (and many others still ongoing) and 19 published studies. EPCs originate in the bone marrow and migrate into the bloodstream where they undergo a differentiation program leading to major changes in their antigenic characteristics. EPCs lose typical progenitor markers and acquire endothelial markers, and two important receptors, (VEGFR and CXCR-4), which recruit circulating EPCs to damaged or ischemic microcirculatory (homing to damaged tissues) beds. Overall, therapeutic angiogenesis will likely change the face of regenerative medicine in the next decade with many patients worldwide predicted to benefit from these treatments.
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Affiliation(s)
- Claudio Napoli
- Department of General Pathology, Division of Clinical Pathology and Excellence Research Center on Cardiovascular Diseases, 1st School of Medicine, II University of Naples, 80138 Naples, Italy.
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Liu J, van Mil A, Vrijsen K, Zhao J, Gao L, Metz CHG, Goumans MJ, Doevendans PA, Sluijter JPG. MicroRNA-155 prevents necrotic cell death in human cardiomyocyte progenitor cells via targeting RIP1. J Cell Mol Med 2010; 15:1474-82. [PMID: 20550618 PMCID: PMC3823192 DOI: 10.1111/j.1582-4934.2010.01104.x] [Citation(s) in RCA: 104] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
To improve regeneration of the injured myocardium, cardiomyocyte progenitor cells (CMPCs) have been put forward as a potential cell source for transplantation therapy. Although cell transplantation therapy displayed promising results, many issues need to be addressed before fully appreciating their impact. One of the hurdles is poor graft-cell survival upon injection, thereby limiting potential beneficial effects. Here, we attempt to improve CMPCs survival by increasing microRNA-155 (miR-155) levels, potentially to improve engraftment upon transplantation. Using quantitative PCR, we observed a 4-fold increase of miR-155 when CMPCs were exposed to hydrogen-peroxide stimulation. Flow cytometric analysis of cell viability, apoptosis and necrosis showed that necrosis is the main cause of cell death. Overexpressing miR-155 in CMPCs revealed that miR-155 attenuated necrotic cell death by 40 ± 2.3%via targeting receptor interacting protein 1 (RIP1). In addition, inhibiting RIP1, either by pre-incubating the cells with a RIP1 specific inhibitor, Necrostatin-1 or siRNA mediated knockdown, reduced necrosis by 38 ± 2.5% and 33 ± 1.9%, respectively. Interestingly, analysing gene expression using a PCR-array showed that increased miR-155 levels did not change cell survival and apoptotic related gene expression. By targeting RIP1, miR-155 repressed necrotic cell death of CMPCs, independent of activation of Akt pro-survival pathway. MiR-155 provides the opportunity to block necrosis, a conventionally thought non-regulated process, and might be a potential novel approach to improve cell engraftment for cell therapy.
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Affiliation(s)
- Jia Liu
- Department of Endocrinology, Provincial Hospital/Shandong University, Jinan, China
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17
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Visconti RP, Kasyanov V, Gentile C, Zhang J, Markwald RR, Mironov V. Towards organ printing: engineering an intra-organ branched vascular tree. Expert Opin Biol Ther 2010; 10:409-20. [PMID: 20132061 PMCID: PMC4580374 DOI: 10.1517/14712590903563352] [Citation(s) in RCA: 149] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
IMPORTANCE OF THE FIELD Effective vascularization of thick three-dimensional engineered tissue constructs is a problem in tissue engineering. As in native organs, a tissue-engineered intra-organ vascular tree must be comprised of a network of hierarchically branched vascular segments. Despite this requirement, current tissue-engineering efforts are still focused predominantly on engineering either large-diameter macrovessels or microvascular networks. AREAS COVERED IN THIS REVIEW We present the emerging concept of organ printing or robotic additive biofabrication of an intra-organ branched vascular tree, based on the ability of vascular tissue spheroids to undergo self-assembly. WHAT THE READER WILL GAIN The feasibility and challenges of this robotic biofabrication approach to intra-organ vascularization for tissue engineering based on organ-printing technology using self-assembling vascular tissue spheroids including clinically relevantly vascular cell sources are analyzed. TAKE HOME MESSAGE It is not possible to engineer 3D thick tissue or organ constructs without effective vascularization. An effective intra-organ vascular system cannot be built by the simple connection of large-diameter vessels and microvessels. Successful engineering of functional human organs suitable for surgical implantation will require concomitant engineering of a 'built in' intra-organ branched vascular system. Organ printing enables biofabrication of human organ constructs with a 'built in' intra-organ branched vascular tree.
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Affiliation(s)
- Richard P Visconti
- Medical University of South Carolina, Bioprinting Research Center, Department of Regenerative Medicine and Cell Biology, 173 Ashley Avenue, Charleston, SC 29425, USA
| | - Vladimir Kasyanov
- Riga Stradins University, Department of Anatomy and Anthropology, Riga, Latvia
| | - Carmine Gentile
- Medical University of South Carolina, Bioprinting Research Center, Department of Regenerative Medicine and Cell Biology, 173 Ashley Avenue, Charleston, SC 29425, USA
| | - Jing Zhang
- Medical University of South Carolina, Bioprinting Research Center, Department of Regenerative Medicine and Cell Biology, 173 Ashley Avenue, Charleston, SC 29425, USA
| | - Roger R Markwald
- Medical University of South Carolina, Bioprinting Research Center, Department of Regenerative Medicine and Cell Biology, 173 Ashley Avenue, Charleston, SC 29425, USA
| | - Vladimir Mironov
- Medical University of South Carolina, Bioprinting Research Center, Department of Regenerative Medicine and Cell Biology, 173 Ashley Avenue, Charleston, SC 29425, USA
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18
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He XQ, Chen MS, Li SH, Liu SM, Zhong Y, McDonald Kinkaid HY, Lu WY, Weisel RD, Li RK. Co-culture with cardiomyocytes enhanced the myogenic conversion of mesenchymal stromal cells in a dose-dependent manner. Mol Cell Biochem 2010; 339:89-98. [DOI: 10.1007/s11010-009-0372-2] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2009] [Accepted: 12/21/2009] [Indexed: 01/22/2023]
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19
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Lee J, Lee KY. Local and Sustained Vascular Endothelial Growth Factor Delivery for Angiogenesis Using an Injectable System. Pharm Res 2009; 26:1739-44. [DOI: 10.1007/s11095-009-9884-4] [Citation(s) in RCA: 81] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2009] [Accepted: 03/24/2009] [Indexed: 11/29/2022]
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20
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Zeng G, Bautch VL. Differentiation and dynamic analysis of primitive vessels from embryonic stem cells. Methods Mol Biol 2009; 482:333-44. [PMID: 19089366 DOI: 10.1007/978-1-59745-060-7_21] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Embryonic stem (ES) cells, which are derived from developing mouse blastocysts, have the ability to differentiate into various cell types in vitro. When placed in basal medium with added serum, mouse ES cells undergo a programmed differentiation favoring formation of cell types that are found in the embryonic yolk sac, including vascular endothelial cells. These in vitro differentiated endothelial cells form primitive blood vessels, analogous to the first vessels that form in the embryo and the yolk sac. This differentiation model is ideal for both genetic and pharmacological manipulation of early vascular development. We have made mouse ES cell lines that express endothelial-specific GFP or H2B-GFP and used these lines to study the processes of mammalian vessel development by real-time imaging. Here we describe protocols for making transgenic ES cells and imaging the processes of blood vessel development. We also provide methods for ES cell maintenance and differentiation, and methods for analysis of vascular marker expression.
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Affiliation(s)
- Gefei Zeng
- Department of Biology, Carolina Cardiovascular Biology Center, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA
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22
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Suuronen EJ, Kuraitis D, Ruel M. Improving cell engraftment with tissue engineering. Semin Thorac Cardiovasc Surg 2008; 20:110-4. [PMID: 18707642 DOI: 10.1053/j.semtcvs.2008.03.005] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 03/11/2008] [Indexed: 11/11/2022]
Abstract
Cardiac cell therapy has not yet resulted in long-term clinical benefits or major recovery of myocardial function in humans. To date, most of the cardiac effects of cell-based therapy are believed to be mediated by a local angiogenic response rather than by the formation of neosyncytial contractile units such as had initially been hoped for. Therefore, repopulation of the ischemic or infarcted heart with progenitor cells that have vasculogenic potential may be an important mechanism to improve contractile function, both in the presence of viable and nonviable myocardium. This constitutes a focus within scientific reach; however, the low engraftment and viability of progenitor cells after transplantation necessitate the exploration of novel delivery techniques. Because biomaterials have the capacity to improve cell retention, survival, and differentiation, tissue engineering is now being explored as an approach to support cell-based therapies and enhance their efficacy. In this article, we address current progress made in tissue engineering to support cell therapy for the heart, and summarize our work in the development of biomaterials toward improving cell delivery and vascularization of ischemic tissue.
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Affiliation(s)
- Erik J Suuronen
- Division of Cardiac Surgery, University of Ottawa Heart Institute, Ottawa, Ontario, Canada
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23
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Henderson JT. Lazarus's gate: challenges and potential of epigenetic reprogramming of somatic cells. Clin Pharmacol Ther 2008; 83:889-93. [PMID: 18388874 DOI: 10.1038/clpt.2008.51] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The past year has seen tremendous advances in epigenetic reprogramming of somatic cells. Direct genesis of pluripotent stem cells, in contrast to earlier somatic cell nuclear transfer (SCNT) techniques, removes significant ethical and regulatory concerns regarding the utilization of human oocytes and zygotes, and represents a significant step toward the development of nonxenogeneic production methods. While significant technical hurdles remain, this and related technologies are enabling new approaches toward clinical treatments, basic research and diagnostics, and drug evaluation.
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Affiliation(s)
- J T Henderson
- Department of Pharmaceutical Sciences, Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada.
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24
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Francis ME, Uriel S, Brey EM. Endothelial Cell–Matrix Interactions in Neovascularization. TISSUE ENGINEERING PART B-REVIEWS 2008; 14:19-32. [DOI: 10.1089/teb.2007.0115] [Citation(s) in RCA: 65] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Megan E. Francis
- Pritzker Institute of Biomedical Science and Engineering, Illinois Institute of Technology, Chicago, Illinois
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, Illinois
- Department of Research, Hines V.A. Hospital, Hines, Illinois
| | - Shiri Uriel
- Pritzker Institute of Biomedical Science and Engineering, Illinois Institute of Technology, Chicago, Illinois
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, Illinois
| | - Eric M. Brey
- Pritzker Institute of Biomedical Science and Engineering, Illinois Institute of Technology, Chicago, Illinois
- Department of Biomedical Engineering, Illinois Institute of Technology, Chicago, Illinois
- Department of Research, Hines V.A. Hospital, Hines, Illinois
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25
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Roy S, Khanna S, Sen CK. Redox regulation of the VEGF signaling path and tissue vascularization: Hydrogen peroxide, the common link between physical exercise and cutaneous wound healing. Free Radic Biol Med 2008; 44:180-92. [PMID: 18191754 DOI: 10.1016/j.freeradbiomed.2007.01.025] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/24/2006] [Revised: 12/14/2006] [Accepted: 01/05/2007] [Indexed: 12/17/2022]
Abstract
Vascularization, under physiological or pathophysiological conditions, typically takes place by one or more of the following processes: angiogenesis, vasculogenesis, arteriogenesis, and lymphangiogenesis. Although all of these mechanisms of vascularization have sufficient contrasting features to warrant consideration under separate cover, one common feature shared by all is their sensitivity to the VEGF signaling pathway. Conditions such as wound healing and physical exercise result in increased production of reactive oxygen species such as H(2)O(2), and both are associated with increased tissue vascularization. Understanding these two scenarios of adult tissue vascularization in tandem offers the potential to unlock the significance of redox regulation of the VEGF signaling pathway. Does H(2)O(2) support tissue vascularization? H(2)O(2) induces the expression of the most angiogenic form of VEGF, VEGF-A, by a HIF-independent and Sp1-dependent mechanism. Ligation of VEGF-A to VEGFR2 results in signal transduction leading to tissue vascularization. Such ligation generates H(2)O(2) via an NADPH oxidase-dependent mechanism. Disruption of VEGF-VEGFR2 ligation-dependent H(2)O(2) production or decomposition of such H(2)O(2) stalls VEGFR2 signaling. Numerous antioxidants exhibit antiangiogenic properties. Current evidence lends firm credence to the hypothesis that low-level endogenous H(2)O(2) supports vascular growth.
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Affiliation(s)
- Sashwati Roy
- Department of Surgery, Davis Heart and Lung Research Institute, The Ohio State University Medical Center, Columbus, OH 43210, USA.
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26
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Sun H, Qu Z, Guo Y, Zang G, Yang B. In vitro and in vivo effects of rat kidney vascular endothelial cells on osteogenesis of rat bone marrow mesenchymal stem cells growing on polylactide-glycoli acid (PLGA) scaffolds. Biomed Eng Online 2007; 6:41. [PMID: 17980048 PMCID: PMC2186340 DOI: 10.1186/1475-925x-6-41] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2007] [Accepted: 11/04/2007] [Indexed: 11/15/2022] Open
Abstract
It is well established that vascularization is critical for osteogenesis. However, adequate vascularization also remains one of the major challenges in tissue engineering of bone. This problem is further accentuated in regeneration of large volume of tissue. Although a complex process, vascularization involves reciprocal regulation and functional interaction between endothelial and osteoblast-like cells during osteogenesis. This prompted us to investigate the possibility of producing bone tissue both in vitro and ectopically in vivo using vascular endothelial cells because we hypothesized that the direct contact or interaction between vascular endothelial cells and bone marrow mesenchymal stem cells are of benefit to osteogenesis in vitro and in vivo. For that purpose we co-cultured rat bone marrow mesenchymal stem cells (MSC) and kidney vascular endothelial cells (VEC) with polylactide-glycolic acid scaffolds. In vitro experiments using alkaline phosphatase and osteocalcin assays demonstrated the proliferation and differentiation of MSC into osteoblast-like cells, especially the direct contact between VEC and MSC. In addition, histochemical analysis with CD31 and von-Willebrand factor staining showed that VEC retained their endothelial characteristics. In vivo implantation of MSC and VEC co-cultures into rat's muscle resulted in pre-vascular network-like structure established by the VEC in the PLGA. These structures developed into vascularized tissue, and increased the amount and size of the new bone compared to the control group (p < 0.05). These results suggest that the vascular endothelial cells could efficiently stimulate the in vitro proliferation and differentiation of osteoblast-like cells and promote osteogenesis in vivo by the direct contact or interaction with the MSC. This technique for optimal regeneration of bone should be further investigated.
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Affiliation(s)
- Hongchen Sun
- Department of Oral Pathology, School of Stomatology, JiLin University, ChangChun 130041, PR China.
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27
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Ballard VLT, Edelberg JM. Targets for regulating angiogenesis in the ageing endothelium. Expert Opin Ther Targets 2007; 11:1385-99. [DOI: 10.1517/14728222.11.11.1385] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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28
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Qian H, Yang Y, Li J, Huang J, Dou K, Yang G. The role of vascular stem cells in atherogenesis and post-angioplasty restenosis. Ageing Res Rev 2007; 6:109-27. [PMID: 17324640 DOI: 10.1016/j.arr.2007.01.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2006] [Revised: 09/16/2006] [Accepted: 01/19/2007] [Indexed: 12/20/2022]
Abstract
It is well known that atherosclerosis prevails in elderly populations as ageing acts as a recognized risk factor for this disease. Although the pathogenic factors leading to atherosclerosis are highly heterogeneous, traditionally speaking, the causative risk factors include hyperlipidemia, hypertension, diabetes mellitus and smoking, which can damage to endothelial function, and subsequently promote lipid penetration and inflammatory cell infiltration. Damaged endothelial cells (ECs) may be replaced by neighboring cell division, while damaged smooth muscle cells (SMCs) may be replaced by medial SMCs emigrating into the intima during atherogenesis. However, this standpoint is challenged by recent findings that vascular progenitor/stem cells (VPCs) may contribute to atherogenesis and post-angioplasty restenosis. VPCs are a group of primitive cells that have the potential to produce mature, functional cells in the vascular wall. VPCs residing in bone marrow, vascular wall or circulating in the peripheral blood may be stimulated by a variety of pathogenic factors. These stem cells then participate in regeneration, repair and remodeling of the injured arterial wall. This new concept may bring about a great breakthrough in understanding the pathogenesis of atherosclerosis and develop novel therapeutic strategies for coronary heart disease. This article will mainly review the role of VPCs in atherogenesis, thus providing a novel understanding about the pathophysiology of atherosclerosis.
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Affiliation(s)
- Haiyan Qian
- Department of Cardiology, Fuwai Hospital and Cardiovascular Institute, Peking Union Medical College and Chinese Academy of Medical Sciences, 167 BeiLiShi Road, Beijing 100037, PR China
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29
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Laschke MW, Witt K, Pohlemann T, Menger MD. Injectable nanocrystalline hydroxyapatite paste for bone substitution:In vivo analysis of biocompatibility and vascularization. J Biomed Mater Res B Appl Biomater 2007; 82:494-505. [PMID: 17279565 DOI: 10.1002/jbm.b.30755] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The nanocrystalline hydroxyapatite paste Ostim represents a fully degradable synthetic bone substitute for the filling of bone defects. Herein, we investigated in vivo the inflammatory and angiogenic host tissue response to this biomaterial after implantation. For this purpose, Ostim was implanted into the dorsal skinfold chambers of Syrian golden hamsters. The hydroxyapatite ceramic Cerabone and isogeneic transplanted cancellous bone served as controls. Angiogenesis, microhemodynamics, microvascular permeability, and leukocyte-endothelial cell interaction of the host tissue were analyzed over 2 weeks using intravital fluorescence microscopy. Ostim exhibited good biocompatibility comparable to that of Cerabone and cancellous bone, as indicated by a lack of venular leukocyte activation after implantation. Cancellous bone induced a more pronounced angiogenic response and an increased microvessel density when compared with the synthetic bone substitutes. In contrast to Cerabone, however, Ostim showed a guided neovascularization directed toward areas of degradation. Histology confirmed the ingrowth of proliferating vascularized tissue into the hydroxyapatite paste at sites of degradation, while the hydroxyapatite ceramic was not pierced by new microvessels. Thus, Ostim represents an injectable synthetic bone substitute, which may optimize the conditions for the formation of new bone at sites of bone defects by supporting a guided vascularization during biodegradation.
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Affiliation(s)
- Matthias W Laschke
- Institute for Clinical and Experimental Surgery, University of Saarland, 66421 Homburg, Saar, Germany.
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30
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Laschke MW, Harder Y, Amon M, Martin I, Farhadi J, Ring A, Torio-Padron N, Schramm R, Rücker M, Junker D, Häufel JM, Carvalho C, Heberer M, Germann G, Vollmar B, Menger MD. Angiogenesis in Tissue Engineering: Breathing Life into Constructed Tissue Substitutes. ACTA ACUST UNITED AC 2006; 12:2093-104. [PMID: 16968151 DOI: 10.1089/ten.2006.12.2093] [Citation(s) in RCA: 380] [Impact Index Per Article: 21.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Long-term function of three-dimensional (3D) tissue constructs depends on adequate vascularization after implantation. Accordingly, research in tissue engineering has focused on the analysis of angiogenesis. For this purpose, 2 sophisticated in vivo models (the chorioallantoic membrane and the dorsal skinfold chamber) have recently been introduced in tissue engineering research, allowing a more detailed analysis of angiogenic dysfunction and engraftment failure. To achieve vascularization of tissue constructs, several approaches are currently under investigation. These include the modification of biomaterial properties of scaffolds and the stimulation of blood vessel development and maturation by different growth factors using slow-release devices through pre-encapsulated microspheres. Moreover, new microvascular networks in tissue substitutes can be engineered by using endothelial cells and stem cells or by creating arteriovenous shunt loops. Nonetheless, the currently used techniques are not sufficient to induce the rapid vascularization necessary for an adequate cellular oxygen supply. Thus, future directions of research should focus on the creation of microvascular networks within 3D tissue constructs in vitro before implantation or by co-stimulation of angiogenesis and parenchymal cell proliferation to engineer the vascularized tissue substitute in situ.
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Affiliation(s)
- Matthias W Laschke
- Institute for Clinical and Experimental Surgery, University of Saarland, Homburg, Germany.
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31
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Laschke MW, Harder Y, Amon M, Martin I, Farhadi J, Ring A, Torio-Padron N, Schramm R, Rücker M, Junker D, Hä JM, Carvalho C, Heberer M, Germann G, Vollmar B, Menger MD. Angiogenesis in Tissue Engineering: Breathing Life into Constructed Tissue Substitutes. ACTA ACUST UNITED AC 2006. [DOI: 10.1089/ten.2006.12.ft-130] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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32
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Riha GM, Lin PH, Lumsden AB, Yao Q, Chen C. Review: application of stem cells for vascular tissue engineering. ACTA ACUST UNITED AC 2005; 11:1535-52. [PMID: 16259608 DOI: 10.1089/ten.2005.11.1535] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
As the prevalence of vascular disease has continued to expand, the need for a suitable arterial replacement has prompted researchers to look beyond synthetic and autologous grafts toward the field of tissue engineering. Advances in vascular tissue engineering have utilized both mesenchymal and hematopoietic stem cells as a cell source in an attempt to create a fully engineered small-diameter graft. Stem cells offer enormous potential as a cell source because of their proliferative and growth potential, and the application of stem cell technology has far-reaching implications for future applications. The innovative use of stem cells for vascular tissue engineering has opened new possibilities for a fully engineered blood vessel. The purpose of this review is to summarize the current perspective on the use of stem cells for vascular tissue engineering. It focuses principally on the classes of stem cells used, techniques for differentiation scaffolding technology, and the successes and failures of models.
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Affiliation(s)
- Gordon M Riha
- Molecular Surgeon Research Center, Division of Vascular Surgery and Endovascular Therapy, Michael E. DeBakey Department of Surgery, Baylor College of Medicine, Houston, Texas 77030, USA
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Weylie B, Zhu J, Singh U, Ambrus S, Forough R. Phosphatidylinositide 3-Kinase Is Important in Late-Stage Fibroblast Growth Factor-1-Mediated Angiogenesis in vivo. J Vasc Res 2005; 43:61-9. [PMID: 16272825 DOI: 10.1159/000089492] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2004] [Accepted: 06/25/2005] [Indexed: 11/19/2022] Open
Abstract
We previously reported that overexpression of a secreted version of fibroblast growth factor-1 (sp-FGF-1) has the ability to induce angiogenesis in the chicken chorioallantoic membrane (CAM). In our current study, we examine the effects of sp-FGF-1 through a time course analysis of angiogenesis in the chicken CAM on days 3, 4, and 5 after gene transfection. Significant angiogenesis was observed on days 4 and 5 after gene transfection in the CAM assay. To evaluate the role of phosphatidylinositide 3-kinase (PI3K) signaling in sp-FGF-1-induced angiogenesis, we analyzed mRNA expression levels of PI3K and protein activity through its immediate downstream target, AKT-1. We found upregulation of both PI3K and AKT mRNA expression levels in day 5 sp-FGF-1 versus day 5 vector control-transfected CAMs. Furthermore, by blocking PI3K phosphorylation using the specific inhibitor, LY294002, we found that downstream phosphorylation of AKT-1 was inhibited. More importantly, the blockade of the PI3K pathway via LY294002 in sp-FGF-1-transfected CAMs significantly inhibited angiogenesis. These results further elucidate the molecular mechanisms of the sp-FGF-1 signaling pathway and it underscores the importance of PI3K signaling in FGF-1-stimulated angiogenesis in vivo. It also provides a basis for the role of sp-FGF-1 in the development of therapeutic treatments to combat vascular insufficiencies and angiogenesis-dependent cancers.
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Affiliation(s)
- Brian Weylie
- Department of Medical Physiology and Cardiovascular Research Institute, Texas A&M University System Health Science Center, College of Medicine, Temple, TX, USA
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Vernet D, Nolazco G, Cantini L, Magee TR, Qian A, Rajfer J, Gonzalez-Cadavid NF. Evidence That Osteogenic Progenitor Cells in the Human Tunica Albuginea May Originate from Stem Cells: Implications for Peyronie Disease1. Biol Reprod 2005; 73:1199-210. [PMID: 16093362 DOI: 10.1095/biolreprod.105.041038] [Citation(s) in RCA: 67] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Tissue ossification in Peyronie disease (commonly known as Peyronie's disease [PD]), a localized fibrotic lesion within the tunica albuginea (TA) of the penis, may result from osteogenic differentiation of fibroblasts, myofibroblasts, and/or adult stem cells in the TA, and may be triggered by chronic inflammation, oxidative stress, and profibrotic factors like transforming growth factor beta 1 (TGFB1). In this study, we have investigated whether cultures of cells from normal TA and PD plaques undergo osteogenesis, express markers for stem cells, and originate other cell lineages via processes modulated by TGFB1. We found that TA and PD cells in osteogenic medium (OM) expressed osteogenic markers, alkaline phosphatase, and osteopontin and underwent calcification. PD cells, but not TA cells, formed foci in soft agar that were positive for alkaline phosphatase and calcification and expressed the mRNAs for osteoblast-specific factors pleiotrophin and periostin and bone morphogenic protein 2. Both cultures expressed stem cell marker CD34 antigen but not protein tyrosine phosphatase, receptor type c. TA and PD cells expressed smooth-muscle cell markers smoothelin and transgelin. None of the cultures underwent adipogenesis in adipogenic medium. Incubation with TGFB1 increased osteogenesis and myofibroblast differentiation and reduced CD34 antigen expression in both cultures. TA and PD cells modulated the differentiation of the multipotent C3H 10T(1/2) cells in dual cultures, into osteoblasts and myofibroblasts. In conclusion, both TA and PD cultures contain cells, presumably stem cells, that undergo osteogenic and myofibroblast differentiation, and may induce these processes by paracrine interactions. This may explain progression of fibrosis in the PD plaque and its eventual calcification.
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Affiliation(s)
- Dolores Vernet
- Department of Urology, UCLA School of Medicine, Los Angeles, California 90095, USA
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Sales KM, Salacinski HJ, Alobaid N, Mikhail M, Balakrishnan V, Seifalian AM. Advancing vascular tissue engineering: the role of stem cell technology. Trends Biotechnol 2005; 23:461-7. [PMID: 15979750 DOI: 10.1016/j.tibtech.2005.06.006] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2005] [Revised: 04/28/2005] [Accepted: 06/10/2005] [Indexed: 01/19/2023]
Abstract
Atherosclerosis and heart disease are still the leading causes of morbidity and mortality worldwide. The lack of suitable autologous grafts has produced a need for artificial grafts but the patency of such grafts is limited compared to natural materials. Tissue engineering, whereby living tissue replacements can be constructed, has emerged as a solution to some of these difficulties. This, in turn, is limited by the availability of suitable cells from which to construct the vessels. The development of prosthesis using progenitor cells and switching these into endothelial cells is an important and exciting advance in the field of tissue engineering. Here, we describe recent developments in the use of stem cells for the development of replacement vessels. These paradigm shifts in vascular engineering now offer a new route for effective clinical therapy.
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Affiliation(s)
- Kevin M Sales
- Biomaterials & Tissue Engineering Centre (BTEC), Academic Division of Surgical and Interventional Sciences, University College London, Rowland Hill Street, London NW3 2PF, UK
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Milkiewicz M, Ispanovic E, Doyle JL, Haas TL. Regulators of angiogenesis and strategies for their therapeutic manipulation. Int J Biochem Cell Biol 2005; 38:333-57. [PMID: 16309946 DOI: 10.1016/j.biocel.2005.10.006] [Citation(s) in RCA: 86] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2005] [Revised: 10/05/2005] [Accepted: 10/11/2005] [Indexed: 12/19/2022]
Abstract
Angiogenesis provides a mechanism by which delivery of oxygen and nutrients is adapted to compliment changes in tissue mass or metabolic activity. However, maladaptive angiogenesis is integral to the process of several diseases common in Western countries, including tumor growth, vascular insufficiency, diabetic retinopathy and rheumatoid arthritis. Understanding the process of capillary growth, including the identification and functional analyses of key pro- and anti-angiogenic factors, provides knowledge that can be applied to improve/reverse these pathological states. Initially, angiogenesis research focused predominantly on vascular endothelial growth factor (VEGF) as a main player in the angiogenesis cascade. It is apparent now that participation of multiple angiogenic factors and signal pathways is critical to enable effective growth and maturation of nascent capillaries. The purpose of this review is to focus on recent progress in identifying angiogenesis signaling pathways that show promise as targets for successful induction or inhibition of capillary growth. The strategies applied to achieve these contradictory tasks are discussed within the framework of our existing fundamental knowledge of angiogenesis signaling cascades, with an emphasis on comparing the employment of distinctive tactics in modulation of these pathways. Innovative developments that are presented include: (1) inducing a pleiotropic response via activation or inhibition of angiogenic transcription factors; (2) modulation of nitric oxide tissue concentration; (3) manipulating the kallikrein-kinin system; (4) use of endothelial progenitor cells as a means to either directly contribute to capillary growth or to be used as a vehicle to deliver "suicide genes" to tumor tissue.
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Affiliation(s)
- Malgorzata Milkiewicz
- School of Kinesiology and Health Sciences, York University, Toronto, Ont. M3J 1P3, Canada
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Abstract
BACKGROUND Blood outgrowth endothelial cells (BOECs) are thought to arise from very rare progenitors that are present in the mononuclear fraction of marrow or peripheral blood. Recently, BOECs have been expanded from progenitors present in buffy coat into confluent monolayers on fibronectin- or collagen-coated polystyrene surfaces. A method for sterile closed-system culture of these cells has not been described, however. Here, efforts are described toward developing closed-system culture of BOECs derived from progenitors present in a mononuclear apheresis unit by use of a cord blood filter, a sterile connection device, and a fibronectin-coated polycarbonate cassette. STUDY DESIGN AND METHODS Strongly adherent cells from a mononuclear apheresis unit were eluted from a cord blood filter and resuspended in EGM-2 with 10 percent serum. Approximately 2 x 10(8) eluted cells were introduced into human fibronectin-coated polycarbonate cassettes. Medium was introduced and removed from cassettes with a sterile connection device and changed every 2 days. After expansion, cells were either cryopreserved or characterized by fluorescence-activated cell sorting analysis and ability to take up Dil-Ac-LDL. RESULTS After 2 to 3 weeks of culture, 3 to 28 colonies with cobblestone morphology were observed in cassettes and passed to new cassettes within 3 to 4 weeks. By approximately 5 weeks of culture, 2 x 10(6) cells were typically obtained. BOECs uniformly took up Dil-Ac-LDL and were CD31+, CD105+, CD146+, CD45-, and CD14-. A population of BOECs was HLA-ABC+ or CD34+. CONCLUSION BOEC progenitors can be isolated from mononuclear apheresis units with cord blood filters, expanded with fibronectin-coated polycarbonate cassettes, and cryopreserved.
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MESH Headings
- Antigens, CD
- Antigens, CD34
- Biomarkers/blood
- Blood Component Removal
- Cell Culture Techniques
- Cells, Cultured
- Cryopreservation
- Culture Media/chemistry
- Culture Media/metabolism
- Endoglin
- Endothelium, Vascular/cytology
- Endothelium, Vascular/immunology
- Fetal Blood/cytology
- Fibronectins/metabolism
- Flow Cytometry
- Fluorescein-5-isothiocyanate
- Fluorescent Dyes
- Hematopoietic Stem Cells/cytology
- Hematopoietic Stem Cells/immunology
- Hematopoietic Stem Cells/physiology
- Humans
- Leukocytes, Mononuclear/cytology
- Leukocytes, Mononuclear/metabolism
- Neovascularization, Physiologic
- Platelet Endothelial Cell Adhesion Molecule-1
- Receptors, Cell Surface
- Receptors, Interleukin-6
- Time Factors
- Vascular Cell Adhesion Molecule-1
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Affiliation(s)
- Stephen J Wagner
- Blood Components Department, American Red Cross Holland Laboratory, Rockville, Maryland 20855, USA.
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Abstract
Angiogenesis, the growth of new blood vessels is essential during fetal development, female reproductive cycle, and tissue repair. In contrast, uncontrolled angiogenesis promotes the neoplastic disease and retinopathies, while inadequate angiogenesis can lead to coronary artery disease. A balance between pro-angiogenic and antiangiogenic growth factors and cytokines tightly controls angiogenesis. Considerable progress has been made in identifying these molecular components to develop angiogenesis based treatments. One of the most specific and critical regulators of angiogenesis is vascular endothelial growth factor (VEGF), which regulates endothelial proliferation, permeability, and survival. Several VEGF based treatments including anti-VEGF and anti-VEGF receptor antibodies/agents are in clinical trials along with several other antiangiogenic treatments. While bevacizumab (anti-VEGF antibody) has been approved for clinical use in colorectal cancer, the side effects of antiangiogenic treatment still remain a challenge. The pros and cons of angiogenesis based treatment are discussed.
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Affiliation(s)
- K Gupta
- Division of Hematology, Oncology and Transplantation, University of Minnesota Medical School, Mayo Mail Code 480, 420 Delaware Street SE, Minneapolis, Minnesota 55455, USA.
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Human mesenchymal stem cell implantation and collagen modification as a tool for tissue engineering. EUROPEAN JOURNAL OF PLASTIC SURGERY 2005. [DOI: 10.1007/s00238-005-0768-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Wang Y, Nan X, Li Y, Zhang R, Yue W, Yan F, Pei X. Induction of umbilical cord blood-derived beta2m-c-Met+ cells into hepatocyte-like cells by coculture with CFSC/HGF cells. Liver Transpl 2005; 11:635-43. [PMID: 15915498 DOI: 10.1002/lt.20419] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Several studies have indicated that adult stem cells derived from bone marrow (BM) and cord blood (CB) can differentiate into hepatocyte-like cells. This ability is important for the treatment of hepatic diseases with BM or CB as a potential approach. However, methods are still being developed for the efficient induction of stem cell differentiation and expansion to get enough cells to be useful. In the present study, we enriched a subset of umbilical cord blood beta(2)m(-)c-Met(+) cells (UCBCCs) and investigated the combination effect of liver nonparenchymal cells (cirrhotic fat-storing cells [CFSCs]) and hepatocyte growth factor (HGF) on the induction of UCBCCs into hepatocyte-like cells. UCBCCs were cocultured with CFSC/HGF feeder layers either directly or separately using insert wells. Flow cytometric analysis showed that most UCBCCs were CD34(+/-)CD90(+/-)CD49f(+)CD29(+)Alb(+)AFP(+). After cocultured with transgenic feeder layers for 7 days, UCBCCs displayed some morphologic characteristics of hepatocytes. Reverse-transcription polymerase chain reaction (RT-PCR) and immunofluorescence cell staining proved that the induced UCBCCs expressed several hepatocyte specific genes including AFP, Alb, CYP1B1 and cytokeratins CK18 and CK19. Furthermore, the induced cells displayed liver specific functions of indocyanine green (ICG) uptake, ammonium metabolism and albumin secretion. Hence, our data have demonstrated that UCBCCs might represent a novel subpopulation of CB-derived stem/progenitor cells capable of successful differentiation into hepatocyte-like cells when incubated with CFSC/HGF cells. In conclusion, not only HGF but also CFSCs and/or the secreted extracellular matrix (ECM) have been shown to be able to serve as essential microenvironment for hepatocyte differentiation.
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Affiliation(s)
- Yunfang Wang
- Department of Stem Cell Biology, Beijing Institute of Transfusion Medicine, Beijing, China
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Smits AM, van Vliet P, Hassink RJ, Goumans MJ, Doevendans PA. The role of stem cells in cardiac regeneration. J Cell Mol Med 2005; 9:25-36. [PMID: 15784162 PMCID: PMC6741329 DOI: 10.1111/j.1582-4934.2005.tb00334.x] [Citation(s) in RCA: 85] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
After myocardial infarction, injured cardiomyocytes are replaced by fibrotic tissue promoting the development of heart failure. Cell transplantation has emerged as a potential therapy and stem cells may be an important and powerful cellular source. Embryonic stem cells can differentiate into true cardiomyocytes, making them in principle an unlimited source of transplantable cells for cardiac repair, although immunological and ethical constraints exist. Somatic stem cells are an attractive option to explore for transplantation as they are autologous, but their differentiation potential is more restricted than embryonic stem cells. Currently, the major sources of somatic cells used for basic research and in clinical trials originate from the bone marrow. The differentiation capacity of different populations of bone marrow-derived stem cells into cardiomyocytes has been studied intensively. The results are rather confusing and difficult to compare, since different isolation and identification methods have been used to determine the cell population studied. To date, only mesenchymal stem cells seem to form cardiomyocytes, and only a small percentage of this population will do so in vitro or in vivo. A newly identified cell population isolated from cardiac tissue, called cardiac progenitor cells, holds great potential for cardiac regeneration. Here we discuss the potential of the different cell populations and their usefulness in stem cell based therapy to repair the damaged heart.
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Affiliation(s)
- Anke M Smits
- Laboratory of Experimental Cardiology, Department of Cardiology, Heart Lung Center, Utrecht, The Netherlands
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Smith J, Kontermann RE, Embleton J, Kumar S. Antibody phage display technologies with special reference to angiogenesis. FASEB J 2005; 19:331-41. [PMID: 15746176 DOI: 10.1096/fj.04-2863rev] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
The presence of blood vessels is a prerequisite for normal development, tissue growth, and tissue repair. However, its abnormal occurrence or absence can also potentiate disease processes. Angiogenic therapies have been used to stimulate blood vessel growth in ischemic conditions such as severe end-stage peripheral vascular disease, ischemic heart disease and stroke and for inhibition of angiogenesis in tumors. The targeting and identification of novel endothelial cell (EC) markers that can ultimately be used in angiogenic strategies is an expanding field but is limited by the availability of reagents. For instance repeated injection of mouse monoclonal antibodies (Mabs) against angiogenic EC, can result in the production of autoantibodies. Therefore, these mouse Mabs cannot be used for therapeutic purposes. Phage display technology was employed in this context to select antibodies, proteins, and peptides against known or novel EC antigens. Furthermore, technologies have been developed that enable the specific targeting of epitopes on cells including the endothelium with high-affinity/avidity antibodies. The focus for these antibody targeting strategies are markers that are unique or up-regulated on angiogenic EC including the vascular endothelial growth factor receptor (VEGFR) KDR, endoglin (CD105), and the extracellular domain B (ED-B) domain of fibronectin (FN). These markers are reviewed herein.
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Affiliation(s)
- Julia Smith
- University of Manchester, Stopford Building, Oxford Rd, Manchester, M13 9PT, UK.
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Kieć-Wilk B, Polus A, Grzybowska J, Mikołajczyk M, Hartwich J, Pryjma J, Skrzeczyńska J, Dembińska-Kieć A. β-Carotene stimulates chemotaxis of human endothelial progenitor cells. Clin Chem Lab Med 2005; 43:488-98. [PMID: 15899670 DOI: 10.1515/cclm.2005.087] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractAngiogenesis is a crucial process in tissue remodeling during growth, both in the embryo and the adult. In our study we concentrated on the direct effect of β-carotene on human umbilical cord originating from endothelial progenitor cells (EPCs). β-Carotene uptake by EPCs was measured using a HPLC method. The determination of cell surface antigens was performed by flow cytometry. The effect on cell proliferation was estimated by measuring bromo-deoxyuridine incorporation. The influence on the formation of a tubular-like structure was investigated in a 3D assay in matrigel. Quantitative gene expression was estimated using real-time PCR. We demonstrated that β-carotene in the physiological range of concentrations found in human blood is a potent activator of EPC chemotaxis, which is accompanied by a change in the expression of genes mediating cell adhesion and homing, but does not activate the final markers of endothelial differentiation. This study points to the prochemotactic and homing activity of β-carotene in undifferentiated endothelial cell progenitors for the first time, which may suggest a potential role of this carotenoid in progenitor cell therapy aimed at angiogenesis and tissue repair.
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Affiliation(s)
- Beata Kieć-Wilk
- Department of Clinical Biochemistry, Medical College, Jagiellonian University, Kraków, Poland
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Hassink RJ, Goumans MJ, Mummery CL, Doevendans PA. Human stem cells shape the future of cardiac regeneration research. Int J Cardiol 2004; 95 Suppl 1:S20-2. [PMID: 15336839 DOI: 10.1016/s0167-5273(04)90006-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Rutger J Hassink
- Department of Cardio-Thoracic Surgery, Heart Lung Center, Utrecht, The Netherlands.
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