1
|
Kanemoto Y, Miyaji H, Nishida E, Miyata S, Mayumi K, Yoshino Y, Kato A, Sugaya T, Akasaka T, Nathanael AJ, Santhakumar S, Oyane A. Periodontal tissue engineering using an apatite/collagen scaffold obtained by a plasma- and precursor-assisted biomimetic process. J Periodontal Res 2021; 57:205-218. [PMID: 34786723 DOI: 10.1111/jre.12954] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Revised: 10/13/2021] [Accepted: 10/30/2021] [Indexed: 12/30/2022]
Abstract
BACKGROUND AND OBJECTIVES In the treatment of severe periodontal destruction, there is a strong demand for advanced scaffolds that can regenerate periodontal tissues with adequate quality and quantity. Recently, we developed a plasma- and precursor-assisted biomimetic process by which a porous collagen scaffold (CS) could be coated with low-crystalline apatite. The apatite-coated collagen scaffold (Ap-CS) promotes cellular ingrowth within the scaffold compared to CS in rat subcutaneous tissue. In the present study, the osteogenic activity of Ap-CS was characterized by cell culture and rat skull augmentation tests. In addition, the periodontal tissue reconstruction with Ap-CS in a beagle dog was compared to that with CS. METHODS The plasma- and precursor-assisted biomimetic process was applied to CS to obtain Ap-CS with a low-crystalline apatite coating. The effects of apatite coating on the scaffold characteristics (i.e., surface morphology, water absorption, Ca release, protein adsorption, and enzymatic degradation resistance) were assessed. Cyto-compatibility and the osteogenic properties of Ap-CS and CS were assessed in vitro using preosteoblastic MC3T3-E1 cells. In addition, we performed in vivo studies to evaluate bone augmentation and periodontal tissue reconstruction with Ap-CS and CS in a rat skull and canine furcation lesion, respectively. RESULTS As previously reported, the plasma- and precursor-assisted biomimetic process generated a low-crystalline apatite layer with a nanoporous structure that uniformly covered the Ap-CS surface. Ap-CS showed significantly higher water absorption, Ca release, lysozyme adsorption, and collagenase resistance than CS. Cell culture experiments revealed that Ap-CS was superior to CS in promoting the osteoblastic differentiation of MC3T3-E1 cells while suppressing their proliferation. Additionally, Ap-CS significantly promoted (compared to CS) the augmentation of the rat skull bone and showed the potential to regenerate alveolar bone in a dog furcation defect. CONCLUSION Ap-CS fabricated by the plasma- and precursor-assisted biomimetic process provided superior promotion of osteogenic differentiation and bone neoformation compared to CS.
Collapse
Affiliation(s)
- Yukimi Kanemoto
- Department of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Hirofumi Miyaji
- Department of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Erika Nishida
- Department of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Saori Miyata
- Department of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Kayoko Mayumi
- Department of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Yuto Yoshino
- Department of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Akihito Kato
- Department of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Tsutomu Sugaya
- Department of Periodontology and Endodontology, Faculty of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Tsukasa Akasaka
- Department of Biomedical Materials and Engineering, Faculty of Dental Medicine, Hokkaido University, Sapporo, Hokkaido, Japan
| | - Arputharaj Joseph Nathanael
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Syama Santhakumar
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| | - Ayako Oyane
- Nanomaterials Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Tsukuba, Ibaraki, Japan
| |
Collapse
|
2
|
Investigation of ultrasonic chronic total occlusion system on a rabbit model. JOURNAL OF SURGERY AND MEDICINE 2021. [DOI: 10.28982/josam.936595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
|
3
|
Osherov AB, Qiang B, Butany J, Wright GA, Strauss BH. A calcified chronic total occlusion preclinical model. Catheter Cardiovasc Interv 2020; 97:437-442. [PMID: 32243080 DOI: 10.1002/ccd.28870] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/08/2020] [Revised: 02/28/2020] [Accepted: 03/17/2020] [Indexed: 11/08/2022]
Abstract
OBJECTIVE To create an experimental chronic total occlusion (CTO) model with calcification by dietary modification (cholesterol, calcium carbonate, vitamin D) and local injection of pro-calcification factors (dipotassium phosphate, calcium chloride, and bone morphogenetic protein-2 [BMP-2]). BACKGROUND Percutaneous revascularization of CTOs frequently fails in heavily calcified occlusions. Development of novel approaches requires a reproducible preclinical model of calcified CTO. METHODS CTOs were created in 18 femoral arteries of 9 New Zealand White rabbits using the thrombin injection model. Dietary interventions included a high cholesterol diet (0.5% or 0.25%), calcium carbonate (150 mg × 3-5 days/week), and vitamin D (50,000 U × 3-5 days/week). In selected animals, BMP-2 (1-4 μg), dipotassium phosphate, and calcium chloride were injected locally at the time of CTO creation. Animals were sacrificed at 2 weeks (n = 4 arteries), 6 weeks (n = 4 arteries), and 10-12 weeks (n = 14 arteries). RESULTS CTOs showed evidence of chronic lipid feeding (foam cells) and chronic inflammation (intimal/medial fibrosis and microvessels, inflammatory cells, internal elastic lamina disruption). In calcium/vitamin D supplemented rabbits, mineralization (calcification and/or ossification) was evident as early as 2 weeks post CTO creation, and in 78% of the overall arteries. Mineralization changes were not present in the absence of calcium/vitamin D dietary supplements. Mineralization occurred in 85% of BMP-treated arteries and 60% of arteries without BMP. CONCLUSIONS Complex mineralization occurs in preclinical CTO models with dietary supplementation of cholesterol with vitamin D and calcium.
Collapse
Affiliation(s)
- Azriel B Osherov
- Schulich Heart Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada.,Faculty of Health Sciences, Ben Gurion University of the Negev, Beer-Sheva, Israel
| | - Beiping Qiang
- Schulich Heart Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Jagdish Butany
- McLaughlin Centre for Molecular Medicine, University of Toronto, Toronto, Ontario, Canada.,Department of Pathology, University Health Network, Toronto, Ontario, Canada
| | - Graham A Wright
- Schulich Heart Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada.,Department of Medical Biophysics, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| | - Bradley H Strauss
- Schulich Heart Centre, Sunnybrook Health Sciences Centre, University of Toronto, Toronto, Ontario, Canada
| |
Collapse
|
4
|
Animal chronic total occlusion models: A review of the current literature and future goals. Thromb Res 2019; 177:83-90. [PMID: 30856383 DOI: 10.1016/j.thromres.2019.03.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 02/01/2019] [Accepted: 03/04/2019] [Indexed: 12/16/2022]
Abstract
Coronary chronic total occlusions (CTOs) are commonly found in patients undergoing coronary angiography and is associated with poorer prognosis than in those patients with other forms of stable coronary artery disease. As such, with an increasing appreciation of this clinical entity, there is a need to identify, firstly the pathophysiological process driving its formation, as well as new percutaneous strategies for revascularisation with long term durability and improved outcomes. An appropriate, reliable and reproducible animal model is vital for both of these objectives. We review the prevalence of spontaneous collaterals in different species, as well as review the current literature with respect to animal models of CTOs, and compare and contrast the advantages and disadvantages of these differing models. Whilst both extrinsic compression models and endoluminal procedures may create situations analogous to a CTO in a human, the ideal animal model of a CTO will include an occluded artery, functional collaterals and a viable myocardium. This would allow study of the process driving collateral formation and arteriogenesis as well as percutaneous intervention strategies for both acute and long term benefits.
Collapse
|
5
|
Sakes A, van der Wiel M, Dodou D, Breedveld P. Endovascular Crossing of Chronic Total Occlusions Using an Impulse: An Explorative Design Study. Cardiovasc Eng Technol 2017; 8:145-163. [PMID: 28516401 PMCID: PMC5446845 DOI: 10.1007/s13239-017-0306-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2016] [Accepted: 04/28/2017] [Indexed: 12/01/2022]
Abstract
In this study we investigated whether exerting an impulse on a Chronic Total Occlusion (CTO) improves the success rate of CTO crossing as compared to the currently used method of statically pushing the guidewire against the CTO. A prototype (Ø2 mm) was developed that generates translational momentum using a spring-loaded indenter and converts it to an impulse during impact. Mechanical performance was evaluated by measuring the peak force and momentum for different spring compressions and strike distances in air and blood-mimicking fluid. Puncture performance, in terms of number of punctures, number of strikes to puncture, and energy transfer from the indenter to the CTO, was assessed for six tip shapes (stamp, wedge, spherical, pointed, hollow spherical, and ringed) on three CTO models with different weight percentages of gelatin and calcium. As a control, a Ø0.4 mm rigid rod was tested. A maximum indenter momentum of 1.3 mNs (velocity of 3.4 m/s), a peak force of 19.2 N (vs. 1.5 N reported in literature and 2.7 N for the control), and CTO displacement of 1.4 mm (vs. 2.7 mm for the control) were measured. The spherical and ringed tips were most effective, with on average 2.3 strikes to puncture the most calcified CTO model. The prototype generated sufficient peak forces to puncture highly calcified CTO models, which are considered most difficult to cross during PCI. Furthermore, CTO displacement was minimized, resulting in a more effective procedure. In future, a smaller, faster, and flexible clinical prototype will be developed.
Collapse
Affiliation(s)
- Aimée Sakes
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Mekelweg 2, 2628 CD, Delft, The Netherlands.
| | - Marleen van der Wiel
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Mekelweg 2, 2628 CD, Delft, The Netherlands
| | - Dimitra Dodou
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Mekelweg 2, 2628 CD, Delft, The Netherlands
| | - Paul Breedveld
- Department of Biomechanical Engineering, Faculty of Mechanical, Maritime and Materials Engineering, Delft University of Technology, Mekelweg 2, 2628 CD, Delft, The Netherlands
| |
Collapse
|
6
|
Kim NY, Lim KS, Jeong MH, Bae IH, Park JK, Nah JW, Park DS, Lee SY, Jang EJ, Kim JM, Kim JH, Kee HJ, Cho SN, Sim DS, Park KH, Hong YJ, Oh SG, Kim SH, Ahn Y, Kang JC. Reliable femoral chronic total occlusion model using a thin biodegradable polymer coated copper stent in a porcine model. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2015; 26:172. [PMID: 25804307 DOI: 10.1007/s10856-015-5506-3] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2014] [Accepted: 02/09/2015] [Indexed: 06/04/2023]
Abstract
Chronic total occlusions (CTOs) are common in patients with peripheral arterial disease (PAD). This study aimed to examine the feasibility and reliability of a CTO induced by a thin biodegradable polymer (polyglycolic acid) coated copper stent in a porcine femoral artery. Novel thin biodegradable polymer coated copper stents (9 mm long) were crimped on an angioplasty balloon (4.5 mm diameter × 12 mm length) and inserted into the femoral artery. Histopathologic analysis was performed 35 days after stenting. In five of six stented femoral arteries, severe in-stent restenosis and total occlusion with collateral circulation were observed without adverse effects such as acute stent thrombosis, leg necrosis, or death at 5 weeks. Fibrous tissue deposition, small vascular channels, calcification, and inflammatory cells were observed in hematoxylin-eosin, Carstair's, and von Kossa tissue stains; these characteristics were similar to pathological findings associated with CTOs in humans. The neointima volume measured by micro-computed tomography was 93.9 ± 4.04 % in the stented femoral arteries. CTOs were reliably induced by novel thin biodegradable polymer coated copper stents in porcine femoral arteries. Successful induction of CTOs may provide a practical understanding of their formation and application of an interventional device for CTO treatment.
Collapse
Affiliation(s)
- Nan Yeol Kim
- Cardiovascular Convergence Research Center Nominated by Korea Ministry of Health and Welfare, Gwangju, Korea
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
7
|
Improved gene transfer efficiency of a DNA-lipid-apatite composite layer by controlling the layer molecular composition. Colloids Surf B Biointerfaces 2014; 122:465-471. [DOI: 10.1016/j.colsurfb.2014.07.001] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2014] [Revised: 05/30/2014] [Accepted: 07/01/2014] [Indexed: 11/21/2022]
|
8
|
Dariolli R, Takimura CK, Campos CA, Lemos PA, Krieger JE. Development of a closed-artery catheter-based myocardial infarction in pigs using sponge and lidocaine hydrochloride infusion to prevent irreversible ventricular fibrillation. Physiol Rep 2014; 2:2/8/e12121. [PMID: 25168871 PMCID: PMC4246577 DOI: 10.14814/phy2.12121] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The objectives of this study were to develop a robust, homogeneous, viable and inexpensive model of closed‐artery catheter‐based model of myocardial infarction (MI) in pigs without major cardiac dysfunction. Suitable animal models that mimic human cardiovascular conditions are of paramount importance to understand the effects of novel therapeutic strategies to improve tissue perfusion and prevent cardiac deterioration post‐MI. Pigs (N = 21, BW = 17 ± 1 kg) receiving continuous iv lidocaine hydrochloride were subjected to percutaneous intracoronary implant of foam sponge into the proximal left circumflex coronary artery. Intraprocedure mortality was 23.8%. ST segment elevation and increased serum Troponin T and CK‐MB were documented in all animals. Thirty days after occlusion, echocardiography (95% IC [9.3–12.4%]) and anatomopathological (95% CI [9.3–12.6%]) analyses confirmed a significant and reproducible MI. Taken together, we provide evidence for a suitable closed‐artery catheter‐based method to produce MI in pigs accompanied by tissue hypoperfusion and absence of overt heart failure. We provide evidence that an inexpensive and easily available material can be used to produce a robust and homogenous percutaneous closed‐artery model of MI in pigs, when associated with lidocaine hydrochloride use. Thirty days after occlusion, anatomopathological (95% IC [9.3–12.6%]) analyses confirmed a significant and reproducible MI accompanied by hypoperfusion and absence of overt heart failure.
Collapse
Affiliation(s)
- Rafael Dariolli
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Celso K Takimura
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Carlos A Campos
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - Pedro A Lemos
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| | - José E Krieger
- Heart Institute (InCor), University of São Paulo Medical School, São Paulo, Brazil
| |
Collapse
|
9
|
Sim DS, Jeong MH, Cha KR, Park SH, Park JO, Shin YM, Shin H, Hong YJ, Ahn Y, Schwartz RS, Kang JC. A reliable porcine coronary model of chronic total occlusion using copper wire stents and bioabsorbable levo-polylactic acid polymer. J Cardiol 2012; 60:443-7. [DOI: 10.1016/j.jjcc.2012.08.001] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2012] [Revised: 06/06/2012] [Accepted: 07/06/2012] [Indexed: 11/26/2022]
|
10
|
Yazaki Y, Oyane A, Araki H, Sogo Y, Ito A, Yamazaki A, Tsurushima H. Fabrication of DNA-antibody-apatite composite layers for cell-targeted gene transfer. SCIENCE AND TECHNOLOGY OF ADVANCED MATERIALS 2012; 13:064204. [PMID: 27877531 PMCID: PMC5099764 DOI: 10.1088/1468-6996/13/6/064204] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2012] [Accepted: 09/20/2012] [Indexed: 06/04/2023]
Abstract
Surface-mediated gene transfer systems using apatite (Ap)-based composite layers have received increased attention in tissue engineering applications owing to their safety, biocompatibility and relatively high efficiency. In this study, DNA-antibody-apatite composite layers (DA-Ap layers), in which DNA and antibody molecules are immobilized within a matrix of apatite nanocrystals, were fabricated using a biomimetic coating process. They were then assayed for their gene transfer capability for application in a specific cell-targeted gene transfer. A DA-Ap layer that was fabricated with an anti-CD49f antibody showed a higher gene transfer capability to the CD49f-positive CHO-K1 cells than a DNA-apatite composite layer (D-Ap layer). The antibody facilitated the gene transfer capability of the DA-Ap layer only to the specific cells that were expressing corresponding antigens. When the DA-Ap layer was fabricated with an anti-N-cadherin antibody, a higher gene transfer capability compared with the D-Ap layer was found in the N-cadherin-positive P19CL6 cells, but not in the N-cadherin-negative UV♀2 cells or in the P19CL6 cells that were pre-blocked with anti-N-cadherin. Therefore, the antigen-antibody binding that takes place at the cell-layer interface should be responsible for the higher gene transfer capability of the DA-Ap than D-Ap layer. These results suggest that the DA-Ap layer works as a mediator in a specific cell-targeted gene transfer system.
Collapse
Affiliation(s)
- Yushin Yazaki
- Research Institute for Science and Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku, Tokyo, 169-8555, Japan
- Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 4, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8562, Japan
| | - Ayako Oyane
- Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 4, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8562, Japan
| | - Hiroko Araki
- Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 4, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8562, Japan
| | - Yu Sogo
- Human Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8566, Japan
| | - Atsuo Ito
- Human Technology Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 6, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8566, Japan
| | - Atsushi Yamazaki
- Department of Resources and Environmental Engineering, Waseda University, 3-4-1 Ohkubo, Shinjuku, Tokyo, 169-8555, Japan
| | - Hideo Tsurushima
- Nanosystem Research Institute, National Institute of Advanced Industrial Science and Technology (AIST), Central 4, 1-1-1 Higashi, Tsukuba, Ibaraki, 305-8562, Japan
- Department of Neurosurgery, Faculty of Medicine, University of Tsukuba, 1-1-1 Tennoudai, Tsukuba, Ibaraki, 305-8575, Japan
| |
Collapse
|
11
|
Removing vascular obstructions: a challenge, yet an opportunity for interventional microdevices. Biomed Microdevices 2012; 14:511-32. [PMID: 22331446 DOI: 10.1007/s10544-011-9627-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Cardiovascular diseases are the leading cause of death worldwide; they are mainly due to vascular obstructions which, in turn, are mainly caused by thrombi and atherosclerotic plaques. Although a variety of removal strategies has been developed for the considered obstructions, none of them is free from limitations and conclusive. The present paper analyzes the physical mechanisms underlying state-of-art removal strategies and classifies them into chemical, mechanical, laser and hybrid (namely chemo-mechanical and mechano-chemical) approaches, while also reviewing corresponding commercial/research tools/devices and procedures. Furthermore, challenges and opportunities for interventional micro/nanodevices are highlighted. In this spirit, the present review should support engineers, researchers active in the micro/nanotechnology field, as well as medical doctors in the development of innovative biomedical solutions for treating vascular obstructions. Data were collected by using the ISI Web of Knowledge portal, buyer's guides and FDA databases; devices not reported on scientific publications, as well as commercial devices no more for sale were discarded. Nearly 70% of the references were published since 2006, 55% since 2008; these percentages respectively raise to 85% and 65% as regards the section specifically reviewing state-of-art removal tools/devices and procedures.
Collapse
|
12
|
Using MDCT to search for recipient vessels for free flaps after multiple procedures for head and neck reconstruction. J Plast Reconstr Aesthet Surg 2012; 65:e229-31. [DOI: 10.1016/j.bjps.2012.02.013] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 12/31/2011] [Accepted: 02/04/2012] [Indexed: 11/18/2022]
|
13
|
Calcium phosphate composite layers for surface-mediated gene transfer. Acta Biomater 2012; 8:2034-46. [PMID: 22343517 DOI: 10.1016/j.actbio.2012.02.003] [Citation(s) in RCA: 84] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2011] [Revised: 01/27/2012] [Accepted: 02/01/2012] [Indexed: 01/17/2023]
Abstract
In this review, the surface-mediated gene transfer system using calcium phosphate composite layers is described. Calcium phosphate ceramics are osteoconductive bioceramics used typically in orthopedic and dental applications. Additionally, calcium phosphate particles precipitated by a liquid-phase process have long been used as a safe and biocompatible transfection reagent in molecular biology. Recently, calcium phosphate composite layers immobilizing DNA were fabricated on the surfaces of base materials through a biomimetic process using supersaturated solutions. These composite layers possess useful characteristics of both osteoconductive bioceramics and transfection reagents; they thus provide a biocompatible surface to support cell adhesion and growth, and can stimulate the cell effectively via surface-mediated gene transfer. By modifying the fabrication conditions, physicochemical and biological properties of the composite layers can be varied. With such an approach, these composite layers can be designed to have improved affinity for cells and to exhibit increased gene transfer efficiency over that of conventional lipid transfection reagents. The composite layers with the increased gene transfer efficiency induced specific cell differentiation and tissue regeneration in vivo. These composite layers, given their good biocompatibility and the potential to control cell behavior on their surfaces, have great potential in tissue engineering applications.
Collapse
|
14
|
Zhu B, Bailey SR, Agrawal CM. Calcification of primary human osteoblast cultures under flow conditions using polycaprolactone scaffolds for intravascular applications. J Tissue Eng Regen Med 2011; 6:687-95. [PMID: 21932279 DOI: 10.1002/term.472] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2010] [Revised: 05/30/2011] [Accepted: 07/05/2011] [Indexed: 11/10/2022]
Abstract
Total atherosclerotic occlusion is a leading cause of death. Recent animal models of this disease are devoid of cell-mediated calcification and arteries are often not occluded gradually. This study is part of a project with the objective of developing a new model featuring the above two characteristics, using a tissue-engineering scaffold. The amount and distribution of calcium deposits in primary human osteoblast (HOB) cultures on polycaprolactone (PCL) scaffolds under flow conditions were investigated. HOBs were cultured on PCL scaffolds with TGF-β1 loadings of 0 (control), 5 and 50 ng. HOB-PCL constructs were cultured in spinner flasks. Under flow conditions, cell numbers present in HOB cultures on PCL scaffolds increased from day 7 to day 14, and most calcification was induced at day 21. TGF-β1 loadings of 5 and 50 ng did not show a significant difference in ALP activity, cell numbers and amount of calcium deposited in HOB cultures, but calcium staining showed that 50 ng TGF-β1 had higher calcium deposited on both days 21 and 28 under flow conditions compared with 5 ng of loading. Amount of calcium deposited by HOBs on day 28 showed a decrease from their levels on day 21. PCL degradation may be a factor contributing to this loss. The results indicate that cell-induced calcification can be achieved on PCL scaffolds under flow conditions. In conclusion, TGFβ1-HOB loaded PCL can be applied to create a model for total atherosclerotic occlusion with cell-deposited calcium in animal arteries.
Collapse
Affiliation(s)
- Beili Zhu
- Department of Biomedical Engineering, College of Engineering, University of Texas at San Antonio, TX, USA
| | - Steven R Bailey
- Department of Biomedical Engineering, College of Engineering, University of Texas at San Antonio, TX, USA.,Janey Briscoe Center for Cardiovascular Research, Janey and Dolph Briscoe Division of Cardiology, Department of Medicine, University of Texas Health Science Center at San Antonio, TX, USA
| | - C Mauli Agrawal
- Department of Biomedical Engineering, College of Engineering, University of Texas at San Antonio, TX, USA
| |
Collapse
|
15
|
Zhu B, Bailey SR, Elliott J, Li X, Escobar GP, Rodriguez EM, Agrawal CM. Development of a total atherosclerotic occlusion with cell-mediated calcium deposits in a rabbit femoral artery using tissue-engineering scaffolds. J Tissue Eng Regen Med 2011; 6:193-204. [PMID: 21400666 DOI: 10.1002/term.413] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/25/2010] [Accepted: 11/30/2010] [Indexed: 01/07/2023]
Abstract
This study sought to establish a chronic total occlusion (CTO) model with cell-mediated calcium deposits in rabbit femoral arteries. CTO is the most severe case in atherosclerosis and contains calcium deposits. Previous animal models of CTO do not mimic the gradual occlusion of arteries or have calcium in physiological form. In the present study we tested the strategy of placing tissue-engineering scaffolds preloaded with cells in arteries to develop a novel CTO model. Primary human osteoblasts (HOBs) were first cultured in vitro on polycaprolactone (PCL) scaffolds with 5 ng TGFβ1 loading for 28 days for precalcification. The HOB-PCL construct was then implanted into a rabbit femoral artery for an additional 3, 10 or 28 days. At the time of sacrifice, angiograms and gross histology of arteries were captured to examine the occlusion of arteries. Fluorescent staining of calcium and EDS detection of calcium were used to evaluate the presence and distribution of calcium inside arteries. Rabbit femoral arteries were totally occluded over 28 days. Calcium was presented at CTO sites at 3, 10 and 28 days, with the day 10 specimens showing the maximum calcium. Chronic inflammatory response and recanalization were observed in day 28 CTO sites. A novel CTO model with cell-mediated calcium has been successfully established in a rabbit femoral artery. This model can be used to develop new devices and therapies to treat severe atherosclerotic occlusion.
Collapse
Affiliation(s)
- Beili Zhu
- Janey Briscoe Center for Cardiovascular Research, Janey and Dolph Briscoe Division of Cardiology, Department of Medicine, University of Texas Health Science Center at San Antonio, TX, USA.
| | | | | | | | | | | | | |
Collapse
|
16
|
The representative porcine model for human cardiovascular disease. J Biomed Biotechnol 2010; 2011:195483. [PMID: 21253493 PMCID: PMC3022214 DOI: 10.1155/2011/195483] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2010] [Accepted: 12/13/2010] [Indexed: 11/18/2022] Open
Abstract
To improve human health, scientific discoveries must be translated into practical applications. Inherent in the development of these technologies is the role of preclinical testing using animal models. Although significant insight into the molecular and cellular basis has come from small animal models, significant differences exist with regard to cardiovascular characteristics between these models and humans. Therefore, large animal models are essential to develop the discoveries from murine models into clinical therapies and interventions.
This paper will provide an overview of the more frequently used large animal models, especially porcine models for preclinical studies.
Collapse
|
17
|
The pre-clinical animal model in the translational research of interventional cardiology. JACC Cardiovasc Interv 2010; 2:373-83. [PMID: 19463458 DOI: 10.1016/j.jcin.2009.03.004] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/18/2008] [Revised: 02/19/2009] [Accepted: 03/08/2009] [Indexed: 11/23/2022]
Abstract
Scientific discoveries for improvement of human health must be translated into practical applications. Such discoveries typically begin at "the bench" with basic research, then progress to the clinical level. In particular, in the field of interventional cardiology, percutaneous cardiovascular intervention has rapidly evolved from an experimental procedure to a therapeutic clinical setting. Pre-clinical studies using animal models play a very important role in the evaluation of efficacy and safety of new medical devices before their use in human clinical studies. This review provides an overview of the emerging role, results of pre-clinical studies and development, and evaluation of animal models for percutaneous cardiovascular intervention technologies for patients with symptomatic cardiovascular disease.
Collapse
|
18
|
Zhu B, Bailey SR, Mauli Agrawal C. Engineering calcium deposits on polycaprolactone scaffolds for intravascular applications using primary human osteoblasts. J Tissue Eng Regen Med 2010; 5:324-36. [DOI: 10.1002/term.327] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2009] [Accepted: 04/27/2010] [Indexed: 11/08/2022]
|