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Rajaram A, Chen XB, Schreyer DJ. Strategic Design and Recent Fabrication Techniques for Bioengineered Tissue Scaffolds to Improve Peripheral Nerve Regeneration. TISSUE ENGINEERING PART B-REVIEWS 2012; 18:454-67. [DOI: 10.1089/ten.teb.2012.0006] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Ajay Rajaram
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, Canada
| | - Xiong-Biao Chen
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, Canada
- Department of Mechanical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, Canada
| | - David J. Schreyer
- Division of Biomedical Engineering, College of Engineering, University of Saskatchewan, Saskatoon, Canada
- Department of Anatomy and Cell Biology, College of Medicine, University of Saskatchewan, Saskatoon, Canada
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202
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Zhang Y, Li W, Ou L, Wang W, Delyagina E, Lux C, Sorg H, Riehemann K, Steinhoff G, Ma N. Targeted delivery of human VEGF gene via complexes of magnetic nanoparticle-adenoviral vectors enhanced cardiac regeneration. PLoS One 2012; 7:e39490. [PMID: 22844395 PMCID: PMC3406048 DOI: 10.1371/journal.pone.0039490] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2011] [Accepted: 05/21/2012] [Indexed: 12/04/2022] Open
Abstract
This study assessed the concept of whether delivery of magnetic nanobeads (MNBs)/adenoviral vectors (Ad)–encoded hVEGF gene (AdhVEGF) could regenerate ischaemically damaged hearts in a rat acute myocardial infarction model under the control of an external magnetic field. Adenoviral vectors were conjugated to MNBs with the Sulfo-NHS-LC-Biotin linker. In vitro transduction efficacy of MNBs/Ad–encoded luciferase gene (Adluc) was compared with Adluc alone in human umbilical vein endothelial cells (HUVECs) under magnetic field stimulation. In vivo, in a rat acute myocardial infarction (AMI) model, MNBs/AdhVEGF complexes were injected intravenously and an epicardial magnet was employed to attract the circulating MNBs/AdhVEGF complexes. In vitro, compared with Adluc alone, MNBs/Adluc complexes had a 50-fold higher transduction efficiency under the magnetic field. In vivo, epicardial magnet effectively attracted MNBs/AdhVEGF complexes and resulted in strong therapeutic gene expression in the ischemic zone of the infarcted heart. When compared to other MI-treated groups, the MI-M+/AdhVEGF group significantly improved left ventricular function (p<0.05) assessed by pressure-volume loops after 4 weeks. Also the MI-M+/AdhVEGF group exhibited higher capillary and arteriole density and lower collagen deposition than other MI-treated groups (p<0.05). Magnetic targeting enhances transduction efficiency and improves heart function. This novel method to improve gene therapy outcomes in AMI treatment offers the potential into clinical applications.
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Affiliation(s)
- Yue Zhang
- Reference- and Translation Center for Cardiac Stem Cell Therapy, Department of Cardiac Surgery, University of Rostock, Rostock, Germany
| | - Wenzhong Li
- Reference- and Translation Center for Cardiac Stem Cell Therapy, Department of Cardiac Surgery, University of Rostock, Rostock, Germany
- Center for Biomaterial Development and Berlin Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
- * E-mail:
| | - Lailiang Ou
- Reference- and Translation Center for Cardiac Stem Cell Therapy, Department of Cardiac Surgery, University of Rostock, Rostock, Germany
| | - Weiwei Wang
- Reference- and Translation Center for Cardiac Stem Cell Therapy, Department of Cardiac Surgery, University of Rostock, Rostock, Germany
- Center for Biomaterial Development and Berlin Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
| | - Evgenya Delyagina
- Reference- and Translation Center for Cardiac Stem Cell Therapy, Department of Cardiac Surgery, University of Rostock, Rostock, Germany
| | - Cornelia Lux
- Reference- and Translation Center for Cardiac Stem Cell Therapy, Department of Cardiac Surgery, University of Rostock, Rostock, Germany
| | - Heiko Sorg
- Department for Plastic, Hand, and Reconstructive Surgery, Hannover Medical School, Hannover, Germany
| | - Kristina Riehemann
- Center for Nanotechnology und Physikalisches Institut, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | - Gustav Steinhoff
- Reference- and Translation Center for Cardiac Stem Cell Therapy, Department of Cardiac Surgery, University of Rostock, Rostock, Germany
| | - Nan Ma
- Reference- and Translation Center for Cardiac Stem Cell Therapy, Department of Cardiac Surgery, University of Rostock, Rostock, Germany
- Center for Biomaterial Development and Berlin Brandenburg Center for Regenerative Therapies, Helmholtz-Zentrum Geesthacht, Teltow, Germany
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203
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Vaněček V, Zablotskii V, Forostyak S, Růžička J, Herynek V, Babič M, Jendelová P, Kubinová S, Dejneka A, Syková E. Highly efficient magnetic targeting of mesenchymal stem cells in spinal cord injury. Int J Nanomedicine 2012; 7:3719-30. [PMID: 22888231 PMCID: PMC3414205 DOI: 10.2147/ijn.s32824] [Citation(s) in RCA: 69] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022] Open
Abstract
The transplantation of mesenchymal stem cells (MSC) is currently under study as a therapeutic approach for spinal cord injury, and the number of transplanted cells that reach the lesioned tissue is one of the critical parameters. In this study, intrathecally transplanted cells labeled with superparamagnetic iron oxide nanoparticles were guided by a magnetic field and successfully targeted near the lesion site in the rat spinal cord. Magnetic resonance imaging and histological analysis revealed significant differences in cell numbers and cell distribution near the lesion site under the magnet in comparison to control groups. The cell distribution correlated well with the calculated distribution of magnetic forces exerted on the transplanted cells in the subarachnoid space and lesion site. The kinetics of the cells’ accumulation near the lesion site is described within the framework of a mathematical model that reveals those parameters critical for cell targeting and suggests ways to enhance the efficiency of magnetic cell delivery. In particular, we show that the targeting efficiency can be increased by using magnets that produce spatially modulated stray fields. Such magnetic systems with tunable geometric parameters may provide the additional level of control needed to enhance the efficiency of stem cell delivery in spinal cord injury.
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Affiliation(s)
- Václav Vaněček
- Institute of Experimental Medicine AS CR, Prague, Czech Republic.
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204
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Phamduy T, Dias A, Raof NA, Schiele N, Corr D, Xie Y, Chrisey D. Laser Direct-Write of Embryonic Stem Cells and Cells Encapsulated in Alginate Beads for Engineered Biological Constructs. ACTA ACUST UNITED AC 2012. [DOI: 10.1557/opl.2012.798] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
AbstractThe ability to control the deposition of mouse embryonic stem cells (mESCs), and mESCs encapsulated in 200-μm diameter alginate microbeads, into customized patterns has recently been achieved using laser direct-write (LDW). Gelatin-based LDW was utilized to target and reproducibly deposit groups of cells directly onto receiving substrate surfaces. Live/dead staining for cell viability and immunocytochemistry for the pluripotency marker, Oct-4, indicated that transferred mESCs were viable following transfer, and maintained an important embryonic stem cell marker, respectively. LDW was further used to print mESCs encapsulated in hydrogel microbeads into customized patterns on a single-bead basis. Recent efforts have also achieved patterns of discrete co-cultures of mESCs and breast cancer cells in separate hydrogel microbeads. Altogether, we demonstrated the feasibility of LDW to print patterns of mESCs and mESC-microbeads for the biomimetic assembly of engineered cellular constructs and tissue models.
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205
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Klopsch C, Steinhoff G. Tissue-Engineered Devices in Cardiovascular Surgery. Eur Surg Res 2012; 49:44-52. [DOI: 10.1159/000339606] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2012] [Accepted: 05/17/2012] [Indexed: 11/19/2022]
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