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Machaidze Z, D’Amore A, Freitas RC, Joyce AJ, Bayoumi A, Rich K, Brown DW, Aikawa E, Wagner WR, Sacks MS, Mayer JE. Tissue formation and host remodeling of an elastomeric biodegradable scaffold in an ovine pulmonary leaflet replacement model. J Biomed Mater Res A 2024; 112:276-287. [PMID: 37772456 PMCID: PMC11034854 DOI: 10.1002/jbm.a.37622] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2023] [Revised: 09/01/2023] [Accepted: 09/12/2023] [Indexed: 09/30/2023]
Abstract
In pursuit of a suitable scaffold material for cardiac valve tissue engineering applications, an acellular, electrospun, biodegradable polyester carbonate urethane urea (PECUU) scaffold was evaluated as a pulmonary valve leaflet replacement in vivo. In sheep (n = 8), a single pulmonary valve leaflet was replaced with a PECUU leaflet and followed for 1, 6, and 12 weeks. Implanted leaflet function was assessed in vivo by echocardiography. Explanted samples were studied for gross pathology, microscopic changes in the extracellular matrix, host cellular re-population, and immune responses, and for biomechanical properties. PECUU leaflets showed normal leaflet motion at implant, but decreased leaflet motion and dimensions at 6 weeks. The leaflets accumulated α-SMA and CD45 positive cells, with surfaces covered with endothelial cells (CD31+). New collagen formation occurred (Picrosirius Red). Accumulated tissue thickness correlated with the decrease in leaflet motion. The PECUU scaffolds had histologic evidence of scaffold degradation and an accumulation of pro-inflammatory/M1 and anti-inflammatory/M2 macrophages over time in vivo. The extent of inflammatory cell accumulation correlated with tissue formation and polymer degradation but was also associated with leaflet thickening and decreased leaflet motion. Future studies should explore pre-implant seeding of polymer scaffolds, more advanced polymer fabrication methods able to more closely approximate native tissue structure and function, and other techniques to control and balance the degradation of biomaterials and new tissue formation by modulation of the host immune response.
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Affiliation(s)
- Zurab Machaidze
- Department of Cardiac Surgery, Boston Children’s Hospital, Harvard Medical School. 300 Longwood Ave. Boston, MA. 02115. USA
| | - Antonio D’Amore
- McGowan Institute for Regenerative Medicine. Departments of Surgery and Bioengineering. University of Pittsburgh, 450 Technology Drive. Suite 300. Pittsburgh, PA 15219
- Fondazione RiMED, Via Bandiera 11, 90133 Palermo, Italy
| | - Renata C.C. Freitas
- Department of Cardiac Surgery, Boston Children’s Hospital, Harvard Medical School. 300 Longwood Ave. Boston, MA. 02115. USA
| | - Angelina J. Joyce
- Department of Cardiac Surgery, Boston Children’s Hospital, Harvard Medical School. 300 Longwood Ave. Boston, MA. 02115. USA
| | - Ahmed Bayoumi
- Department of Cardiac Surgery, Boston Children’s Hospital, Harvard Medical School. 300 Longwood Ave. Boston, MA. 02115. USA
| | - Kimberly Rich
- Department of Cardiac Surgery, Boston Children’s Hospital, Harvard Medical School. 300 Longwood Ave. Boston, MA. 02115. USA
| | - David W. Brown
- Department of Cardiology, Boston Children’s Hospital, Harvard Medical School. 300 Longwood Ave. Boston, MA. 02115. USA
| | - Elena Aikawa
- Center for Excellence in Vascular Biology, Brigham and Women’s Hospital, Harvard Medical School. 77 Ave Louis Pasteur, NRB-7, Boston, MA 02115
| | - William R. Wagner
- McGowan Institute for Regenerative Medicine. Departments of Surgery and Bioengineering. University of Pittsburgh, 450 Technology Drive. Suite 300. Pittsburgh, PA 15219
| | - Michael S. Sacks
- Willerson Center for Cardiovascular Modeling and Simulation. Institute for Computational Engineering and Sciences. Department of Biomedical Engineering. The University of Texas at Austin 201 East 24th Street, Stop C0200. Austin, TX 78712-1229
| | - John E. Mayer
- Department of Cardiac Surgery, Boston Children’s Hospital, Harvard Medical School. 300 Longwood Ave. Boston, MA. 02115. USA
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2
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Lutter G, Pommert NS, Zhang X, Seiler J, Saeid Nia M, Meier D, Sellers SL, Gorb SN, Hansen JH, Seoudy H, Müller OJ, Saad M, Haneya A, Frank D, Puehler T, Sathananthan J. Producing and Testing Prototype Tissue-Engineered 3D Tri-Leaflet Valved Stents on Biodegradable Poly-ε-Caprolactone Scaffolds. Int J Mol Sci 2023; 24:17357. [PMID: 38139185 PMCID: PMC10744316 DOI: 10.3390/ijms242417357] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 11/29/2023] [Accepted: 11/29/2023] [Indexed: 12/24/2023] Open
Abstract
Transcatheter pulmonary valve replacement is a minimally-invasive alternative treatment for right ventricular outflow tract dysfunction and has been rapidly evolving over the past years. Heart valve prostheses currently available still have major limitations. Therefore, one of the significant challenges for the future is the roll out of transcatheter tissue engineered pulmonary valve replacement to more patients. In the present study, biodegradable poly-ε-caprolactone (PCL) nanofiber scaffolds in the form of a 3D leaflet matrix were successfully seeded with human endothelial colony-forming cells (ECFCs), human induced pluripotent stem cell-derived MSCs (hMSCs), and porcine MSCs (pMSCs) for three weeks for the generation of 3D tissue-engineered tri-leaflet valved stent grafts. The cell adhesion, proliferation, and distribution of these 3D heart leaflets was analyzed using fluorescence microscopy and scanning electron microscopy (SEM). All cell lineages were able to increase the overgrown leaflet area within the three-week timeframe. While hMSCs showed a consistent growth rate over the course of three weeks, ECFSs showed almost no increase between days 7 and 14 until a growth spurt appeared between days 14 and 21. More than 90% of heart valve leaflets were covered with cells after the full three-week culturing cycle in nearly all leaflet areas, regardless of which cell type was used. This study shows that seeded biodegradable PCL nanofiber scaffolds incorporated in nitinol or biodegradable stents will offer a new therapeutic option in the future.
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Affiliation(s)
- Georg Lutter
- Department of Cardiac Surgery, University Hospital Schleswig-Holstein (UKSH), 24105 Kiel, Germany; (N.S.P.); (X.Z.); (M.S.N.); (A.H.); (T.P.)
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 69120 Hamburg, Germany; (J.-H.H.); (H.S.); (O.J.M.); (M.S.); (D.F.)
| | - Nina Sophie Pommert
- Department of Cardiac Surgery, University Hospital Schleswig-Holstein (UKSH), 24105 Kiel, Germany; (N.S.P.); (X.Z.); (M.S.N.); (A.H.); (T.P.)
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 69120 Hamburg, Germany; (J.-H.H.); (H.S.); (O.J.M.); (M.S.); (D.F.)
| | - Xiling Zhang
- Department of Cardiac Surgery, University Hospital Schleswig-Holstein (UKSH), 24105 Kiel, Germany; (N.S.P.); (X.Z.); (M.S.N.); (A.H.); (T.P.)
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 69120 Hamburg, Germany; (J.-H.H.); (H.S.); (O.J.M.); (M.S.); (D.F.)
| | - Jette Seiler
- Department of Cardiac Surgery, University Hospital Schleswig-Holstein (UKSH), 24105 Kiel, Germany; (N.S.P.); (X.Z.); (M.S.N.); (A.H.); (T.P.)
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 69120 Hamburg, Germany; (J.-H.H.); (H.S.); (O.J.M.); (M.S.); (D.F.)
| | - Monireh Saeid Nia
- Department of Cardiac Surgery, University Hospital Schleswig-Holstein (UKSH), 24105 Kiel, Germany; (N.S.P.); (X.Z.); (M.S.N.); (A.H.); (T.P.)
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 69120 Hamburg, Germany; (J.-H.H.); (H.S.); (O.J.M.); (M.S.); (D.F.)
| | - David Meier
- Department of Cardiology, Lausanne University Hospital and University of Lausanne, 1015 Lausanne, Switzerland;
| | - Stephanie L. Sellers
- Centre for Cardiovascular Innovation, St Paul’s and Vancouver General Hospital, Vancouver, BC V6Z 1Y6, Canada; (S.L.S.); (J.S.)
- Cardiovascular Translational Laboratory, Providence Research & Centre for Heart Lung Innovation, Vancouver, BC V6Z 1Y6, Canada
- Centre for Heart Valve Innovation, St. Paul’s Hospital, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
| | - Stanislav N. Gorb
- Department of Functional Morphology and Biomechanics, Zoological Institute, Christian-Albrecht University of Kiel, 24105 Kiel, Germany
| | - Jan-Hinnerk Hansen
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 69120 Hamburg, Germany; (J.-H.H.); (H.S.); (O.J.M.); (M.S.); (D.F.)
- Department of Congenital Heart Disease and Pediatric Cardiology, University Hospital Schleswig-Holstein, 24105 Kiel, Germany
| | - Hatim Seoudy
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 69120 Hamburg, Germany; (J.-H.H.); (H.S.); (O.J.M.); (M.S.); (D.F.)
- Department of Cardiology and Angiology, University Hospital Schleswig-Holstein (UKSH), 24105 Kiel, Germany
| | - Oliver J. Müller
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 69120 Hamburg, Germany; (J.-H.H.); (H.S.); (O.J.M.); (M.S.); (D.F.)
- Department of Cardiology and Angiology, University Hospital Schleswig-Holstein (UKSH), 24105 Kiel, Germany
| | - Mohammed Saad
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 69120 Hamburg, Germany; (J.-H.H.); (H.S.); (O.J.M.); (M.S.); (D.F.)
- Department of Cardiology and Angiology, University Hospital Schleswig-Holstein (UKSH), 24105 Kiel, Germany
| | - Assad Haneya
- Department of Cardiac Surgery, University Hospital Schleswig-Holstein (UKSH), 24105 Kiel, Germany; (N.S.P.); (X.Z.); (M.S.N.); (A.H.); (T.P.)
| | - Derk Frank
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 69120 Hamburg, Germany; (J.-H.H.); (H.S.); (O.J.M.); (M.S.); (D.F.)
- Department of Cardiology and Angiology, University Hospital Schleswig-Holstein (UKSH), 24105 Kiel, Germany
| | - Thomas Puehler
- Department of Cardiac Surgery, University Hospital Schleswig-Holstein (UKSH), 24105 Kiel, Germany; (N.S.P.); (X.Z.); (M.S.N.); (A.H.); (T.P.)
- DZHK (German Centre for Cardiovascular Research), Partner Site Hamburg/Kiel/Lübeck, 69120 Hamburg, Germany; (J.-H.H.); (H.S.); (O.J.M.); (M.S.); (D.F.)
| | - Janarthanan Sathananthan
- Centre for Cardiovascular Innovation, St Paul’s and Vancouver General Hospital, Vancouver, BC V6Z 1Y6, Canada; (S.L.S.); (J.S.)
- Cardiovascular Translational Laboratory, Providence Research & Centre for Heart Lung Innovation, Vancouver, BC V6Z 1Y6, Canada
- Centre for Heart Valve Innovation, St. Paul’s Hospital, University of British Columbia, Vancouver, BC V6T 1Z4, Canada
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Garimella A, M R, Ghosh SB, Bandyopadhyay-Ghosh S, Agrawal AK. Bioactive fluorcanasite reinforced magnesium alloy-based porous bio-nanocomposite scaffolds with tunable mechanical properties. J Biomed Mater Res B Appl Biomater 2023; 111:463-477. [PMID: 36208413 DOI: 10.1002/jbm.b.35166] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2022] [Revised: 08/12/2022] [Accepted: 09/03/2022] [Indexed: 12/15/2022]
Abstract
Magnesium (Mg) alloy-based porous bio-nanocomposite bone scaffolds were developed by powder metallurgy route. Selective alloying elements such as calcium (Ca), zinc (Zn) and strontium (Sr) were incorporated to tune the mechanical integrity while, bioactive fluorcanasite nano-particulates were introduced within the alloy system to enhance the bone tissue regeneration. Green compacts containing carbamide were fabricated and sintered using two-stage heat treatment process to achieve the targeted porosities. The microstructure of these fabricated magnesium alloy-based bio-nanocomposites was examined by Field emission scanning electron microscope (FE-SEM) and x-ray micro computed tomography (x-ray μCT), which revealed gradient porosities and distribution of alloying elements. X-ray diffraction (XRD) studies confirmed the presence of major crystalline phases in the fabricated samples and the evolution of the various combinations of intermetallic phases of Ca, Mg, Zn and Sr which were anticipated to enhance the mechanical properties. Further, XRD studies revealed the presence of apatite phase for the immersed samples, a conducive environment for bone regeneration. The fabricated samples were evaluated for their mechanical performance against uniaxial compression load. The tunability of compressive strengths and modulus values could be established with variation in porosities of fabricated samples. The retained compressive strength and Young's modulus of the samples following immersion in phosphate buffered saline (PBS) solution was found to be in line with that of natural human cancellous bone, thereby establishing the potential of the fabricated magnesium-alloy-based nanocomposite as a promising scaffold candidate for bone tissue engineering.
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Affiliation(s)
- Adithya Garimella
- Engineered Biomedical Materials Research and Innovation Centre (EnBioMatRIC), Department of Mechanical Engineering, Manipal University Jaipur, Jaipur, Rajasthan, India.,Department of Mechanical and Manufacturing Engineering, Manipal Institute of Technology Bengaluru, Manipal Academy of Higher Education, Manipal, India
| | - Ramya M
- Department of Biotechnology, Manipal Institute of Technology Bengaluru, Manipal Academy of Higher Education, Manipal, India
| | - Subrata Bandhu Ghosh
- Engineered Biomedical Materials Research and Innovation Centre (EnBioMatRIC), Department of Mechanical Engineering, Manipal University Jaipur, Jaipur, Rajasthan, India
| | - Sanchita Bandyopadhyay-Ghosh
- Engineered Biomedical Materials Research and Innovation Centre (EnBioMatRIC), Department of Mechanical Engineering, Manipal University Jaipur, Jaipur, Rajasthan, India
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4
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Bajuri MY, Kim J, Yu Y, Shahul Hameed MS. New Paradigm in Diabetic Foot Ulcer Grafting Techniques Using 3D-Bioprinted Autologous Minimally Manipulated Homologous Adipose Tissue (3D-AMHAT) with Fibrin Gel Acting as a Biodegradable Scaffold. Gels 2023; 9. [PMID: 36661832 DOI: 10.3390/gels9010066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2022] [Revised: 01/09/2023] [Accepted: 01/10/2023] [Indexed: 01/15/2023] Open
Abstract
Adipose tissue is an abundant source of extracellular substances that support the tissue repair process. This pilot study was carried out to determine the efficacy of 3D-bioprinted autologous adipose tissue grafts on diabetic foot ulcers (DFUs), with fibrin gel used to stabilise the graft. This was a single-arm pilot study in a tertiary hospital that provides diabetic wound care services. A total of 10 patients with a DFU were enrolled, and the primary endpoint was complete healing within 12 weeks. The secondary endpoints were wound size reduction, time to healing, and adverse events. Seven out of ten patients showed complete healing of their DFU within 12 weeks (at 2, 4, 5, 10, and 12 weeks, respectively). The wound size reduction rate was significantly and progressively reduced over time. According to our data, autologous adipose tissue grafting using a 3D bioprinter, with the addition of fibrin gel that acts as a scaffold, promotes wound healing with high-quality skin reconstruction. Throughout this study period, no adverse events were observed.
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5
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Shiroud Heidari B, Ruan R, De-Juan-Pardo EM, Zheng M, Doyle B. Biofabrication and Signaling Strategies for Tendon/Ligament Interfacial Tissue Engineering. ACS Biomater Sci Eng 2021; 7:383-399. [PMID: 33492125 DOI: 10.1021/acsbiomaterials.0c00731] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Tendons and ligaments (TL) have poor healing capability, and for serious injuries like tears or ruptures, surgical intervention employing autografts or allografts is usually required. Current tissue replacements are nonideal and can lead to future problems such as high retear rates, poor tissue integration, or heterotopic ossification. Alternatively, tissue engineering strategies are being pursued using biodegradable scaffolds. As tendons connect muscle and bone and ligaments attach bones, the interface of TL with other tissues represent complex structures, and this intricacy must be considered in tissue engineered approaches. In this paper, we review recent biofabrication and signaling strategies for biodegradable polymeric scaffolds for TL interfacial tissue engineering. First, we discuss biodegradable polymeric scaffolds based on the fabrication techniques as well as the target tissue application. Next, we consider the effect of signaling factors, including cell culture, growth factors, and biophysical stimulation. Then, we discuss human clinical studies on TL tissue healing using commercial synthetic scaffolds that have occurred over the past decade. Finally, we highlight the challenges and future directions for biodegradable scaffolds in the field of TL and interface tissue engineering.
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Affiliation(s)
- Behzad Shiroud Heidari
- Vascular Engineering Laboratory, Harry Perkins Institute of Medical Research, QEII Medical Centre and the UWA Centre for Medical Research, The University of Western Australia, Nedlands, Western Australia 6009, Australia.,School of Engineering, The University of Western Australia, Perth, Western Australia 6009, Australia.,Australian Research Council Centre for Personalised Therapeutics Technologies, Australia
| | - Rui Ruan
- Centre for Orthopaedic Research, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, Western Australia 6009, Australia
| | - Elena M De-Juan-Pardo
- School of Engineering, The University of Western Australia, Perth, Western Australia 6009, Australia.,T3mPLATE, Harry Perkins Institute of Medical Research, QEII Medical Centre and the UWA Centre for Medical Research, The University of Western Australia, Nedlands, Western Australia 6009, Australia.,Science and Engineering Faculty, Queensland University of Technology, Brisbane, Queensland, 4000, Australia
| | - Minghao Zheng
- Centre for Orthopaedic Research, Faculty of Health and Medical Sciences, The University of Western Australia, Perth, Western Australia 6009, Australia.,Perron Institute for Neurological and Translational Science, Nedlands, Western Australia 6009, Australia
| | - Barry Doyle
- Vascular Engineering Laboratory, Harry Perkins Institute of Medical Research, QEII Medical Centre and the UWA Centre for Medical Research, The University of Western Australia, Nedlands, Western Australia 6009, Australia.,School of Engineering, The University of Western Australia, Perth, Western Australia 6009, Australia.,Australian Research Council Centre for Personalised Therapeutics Technologies, Australia.,BHF Centre for Cardiovascular Science, The University of Edinburgh, Edinburgh EH9 3FD, United Kingdom
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Menze R, Wittchow E. In vitro and in vivo evaluation of a novel bioresorbable magnesium scaffold with different surface modifications. J Biomed Mater Res B Appl Biomater 2021; 109:1292-1302. [PMID: 33386677 PMCID: PMC8359236 DOI: 10.1002/jbm.b.34790] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2020] [Revised: 11/19/2020] [Accepted: 12/19/2020] [Indexed: 12/29/2022]
Abstract
The novel Resoloy® rare earth magnesium alloy was developed for bioresorbable vascular implant application, as an alternative to the WE43 used in Biotronik's Magmaris scaffold, which received CE approval in 2016. Initially, the Magmaris showed very promising preclinical and clinical results, but the formation of an unexpected conversion product and a too fast loss of integrity has proven to be a flaw. The safety and efficacy of Resoloy, which is intended to be bioresorbed without any remnants, has been investigated in an in vitro degradation study and a porcine coronary animal model. Four different groups of scaffolds composed of Resoloy (Res) as the backbone material and additionally equipped with a fluoride passivation layer (Res‐F), a polyester topcoat (Res‐P), or a duplex layer composed of a fluoride passivation layer and a polymeric topcoat (Res‐PF) were compared to a Magmaris scaffold in an in vitro degradation test. Preclinical safety and efficacy of Res‐F and Res‐PF were subsequently evaluated in a coronary porcine model for 12 and 28 days. Scanning electron microscope, quantitative coronary angiography, micro‐computed tomography, histopathology, and histomorphometry analyses were conducted to evaluate preclinical parameters and degradation behavior of the scaffolds. Res‐PF with a duplex layer shows the slowest degradation and the longest supporting force of all test groups. The in vitro data are confirmed by the results of the in vivo study, in which Res‐PF exhibited a longer supporting force than Res‐F, but also caused higher neointima formation. Both studied groups showed excellent biocompatibility. A starter colonization of the strut area with cells during bioresorption was observed. The in vitro degradation test shows that a combination of MgF2 passivation and a PLLA topcoat on a Resoloy magnesium backbone (Res‐PF) leads to a much slower degradation and a longer support time than a Magmaris control group. In a preclinical study, the safety and efficacy of this duplex layer could be demonstrated. The beginning colonization of the degraded strut area by macrophages can be seen as clear indications that the resorption of the intermediate degradation product takes a different course than that of the Magmaris scaffold.
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Affiliation(s)
- Roman Menze
- MeKo Laser Material Processing e.K, Sarstedt, Germany
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Lammer J. Commentary: Bioresorbable Drug-Eluting Scaffold for Peripheral Artery Disease: The Best of Two Worlds or Unnecessary? J Endovasc Ther 2020; 27:623-625. [PMID: 32513048 DOI: 10.1177/1526602820928591] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Affiliation(s)
- Johannes Lammer
- Section of Cardiovascular and Interventional Radiology, Department of Biomedical Imaging and Image-guided Therapy, Medical University Vienna, Austria
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8
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Jang LK, Fletcher GK, Monroe MBB, Maitland DJ. Biodegradable shape memory polymer foams with appropriate thermal properties for hemostatic applications. J Biomed Mater Res A 2020; 108:1281-1294. [PMID: 32061006 PMCID: PMC7364661 DOI: 10.1002/jbm.a.36901] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Revised: 02/08/2020] [Accepted: 02/10/2020] [Indexed: 11/11/2022]
Abstract
Shape memory polymer (SMP) foams are a promising material for hemostatic dressings due to their biocompatibility, high surface area, excellent shape recovery, and ability to quickly initiate blood clotting. Biodegradable SMP foams could eliminate the need for a secondary removal procedure of hemostatic material from the patients' wound, further facilitating wound healing. In this study, we developed hydrolytically and oxidatively biodegradable SMP foams by reacting polyols (triethanolamine or glycerol) with 6-aminocaproic acid or glycine to generate foaming monomers with degradable ester bonds. These monomers were used in foam synthesis to provide highly crosslinked SMP foam structures. The ester-containing foams showed clinically relevant thermal properties that were comparable to controls and excellent shape recovery within eight min. Triethanolamine-based ester-containing foams showed interconnected porous structure along with increased mechanical strength. Faster hydrolytic and oxidative biodegradation rates were achieved in ester-containing foams in comparison to controls. These biodegradable SMP foams with clinically applicable thermal properties possess great potential as an effective hemostatic device for use in hospitals or on battlefields.
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Affiliation(s)
- Lindy K. Jang
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas
| | - Grace K. Fletcher
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas
| | - Mary Beth B. Monroe
- Department of Biomedical and Chemical Engineering, Syracuse University, Syracuse, New York
| | - Duncan J. Maitland
- Department of Biomedical Engineering, Texas A&M University, College Station, Texas
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Darvish M, Payandeh Z, Soleimanifar F, Taheri B, Soleimani M, Islami M. Umbilical cord blood mesenchymal stem cells application in hematopoietic stem cells expansion on nanofiber three-dimensional scaffold. J Cell Biochem 2019; 120:12018-12026. [PMID: 30805977 DOI: 10.1002/jcb.28487] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2018] [Revised: 12/22/2018] [Accepted: 01/07/2019] [Indexed: 01/24/2023]
Abstract
Umbilical cord blood (UCB) hematopoietic stem cells (HSCs) transplantation (HSCTs) is considered as a therapeutic strategy for malignant and nonmalignant hematologic disorders. Nevertheless, the low number of HSCs obtained from each unit of UCB can be a major challenge for using these cells in adults. In addition, UCB is a rich source of mesenchymal stem cells (MSCs) creating hopes for nonaggressive and painless treatment in tissue engineering compared with bone marrow MSCs. This study was designed to evaluate the effects of UCB-MSCs application in UCB-HSCs expansion on the nanoscaffold that mimics the cell's natural niche. To achieve this goal, after flow cytometry confirmation of isolated HSCs from UCB, they were expanded on three-dimensional (3D) poly-l-lactic acid (PLLA) scaffolds fabricated by electrospinning and two-dimensional (2D)-culture systems, such as (1) HSCs-MSCs culturing on the scaffold, (2) HSCs culturing on the scaffold, (3) HSCs-MSCs culturing on 2D, and (4) HSCs culturing on 2D. After 7 days, real-time polymerase chain reaction (PCR) was performed to evaluate the CXCR4 gene expression in the mentioned groups. Moreover, for the next validation, the number of total HSCs, 3-(4,5-dimethylthiazol-2-yl)-2,5 diphenyl tetrazolium bromide assay, scanning electron microscopy imaging, and colony-forming unit assay were evaluated as well. The results of the study indicated that UCB-MSCs interaction with HSCs in 3D-culture systems led to the highest expansion of UCB-HSCs on day 7. Flow cytometry results showed the highest purity of HSCs cocultured with MSCs. Real-time PCR showed a significant increase in gene expression of CXCR4 in the mentioned group. The highest viability and clonogenicity were detected in the mentioned group too. Considered together, our results suggest that UCB-HSCs and MSCs coculturing on PLLA scaffold could provide a proper microenvironment that efficiently promotes UCB-HSCs expansion and UCB-MSCs can also be considered as a promising candidate for UCB-HSCTs.
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Affiliation(s)
- Maryam Darvish
- Department of Medical Biotechnology, Faculty of Medicine, Arak University of Medical Science, Arāk, Iran
| | - Zahra Payandeh
- Immunology Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Fatemeh Soleimanifar
- Dietary Supplements and Probiotic Research Center, Alborz University of Medical Sciences, Karaj, Iran
| | - Behnaz Taheri
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | | | - Maryam Islami
- Dietary Supplements and Probiotic Research Center, Alborz University of Medical Sciences, Karaj, Iran
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Fukunishi T, Best CA, Ong CS, Groehl T, Reinhardt J, Yi T, Miyachi H, Zhang H, Shinoka T, Breuer CK, Johnson J, Hibino N. Role of Bone Marrow Mononuclear Cell Seeding for Nanofiber Vascular Grafts. Tissue Eng Part A 2017; 24:135-144. [PMID: 28486019 DOI: 10.1089/ten.tea.2017.0044] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023] Open
Abstract
OBJECTIVE Electrospinning is a promising technology that provides biodegradable nanofiber scaffolds for cardiovascular tissue engineering. However, success with these materials has been limited, and the optimal combination of scaffold parameters for a tissue-engineered vascular graft (TEVG) remains elusive. The purpose of the present study is to evaluate the effect of bone marrow mononuclear cell (BM-MNC) seeding in electrospun scaffolds to support the rational design of optimized TEVGs. METHODS Nanofiber scaffolds were fabricated from co-electrospinning a solution of polyglycolic acid and a solution of poly(ι-lactide-co-ɛ-caprolactone) and characterized with scanning electron microscopy. Platelet activation and cell seeding efficiency were assessed by ATP secretion and DNA assays, respectively. Cell-free and BM-MNC seeded scaffolds were implanted in C57BL/6 mice (n = 15/group) as infrarenal inferior vena cava (IVC) interposition conduits. Animals were followed with serial ultrasonography for 6 months, after which grafts were harvested for evaluation of patency and neotissue formation by histology and immunohistochemistry (n = 10/group) and PCR (n = 5/group) analyses. RESULTS BM-MNC seeding of electrospun scaffolds prevented stenosis compared with unseeded scaffolds (seeded: 9/10 patent vs. unseeded: 1/10 patent, p = 0.0003). Seeded vascular grafts demonstrated concentric laminated smooth muscle cells, a confluent endothelial monolayer, and a collagen-rich extracellular matrix. Platelet-derived ATP, a marker of platelet activation, was significantly reduced after incubating thrombin-activated platelets in the presence of seeded scaffolds compared with unseeded scaffolds (p < 0.0001). In addition, reduced macrophage infiltration and a higher M2 macrophage percentage were observed in seeded grafts. CONCLUSIONS The beneficial effects of BM-MNC seeding apply to electrospun TEVG scaffolds by attenuating stenosis through the regulation of platelet activation and inflammatory macrophage function, leading to well-organized neotissue formation. BM-MNC seeding is a valuable technique that can be used in the rational design of optimal TEVG scaffolds.
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Affiliation(s)
- Takuma Fukunishi
- 1 Department of Cardiac Surgery, Johns Hopkins University , Baltimore, Maryland
| | - Cameron A Best
- 2 Tissue Engineering and Surgical Research, Nationwide Children's Hospital , Columbus, Ohio
| | - Chin Siang Ong
- 1 Department of Cardiac Surgery, Johns Hopkins University , Baltimore, Maryland
| | | | - James Reinhardt
- 2 Tissue Engineering and Surgical Research, Nationwide Children's Hospital , Columbus, Ohio
| | - Tai Yi
- 2 Tissue Engineering and Surgical Research, Nationwide Children's Hospital , Columbus, Ohio
| | - Hideki Miyachi
- 2 Tissue Engineering and Surgical Research, Nationwide Children's Hospital , Columbus, Ohio
| | - Huaitao Zhang
- 1 Department of Cardiac Surgery, Johns Hopkins University , Baltimore, Maryland
| | - Toshiharu Shinoka
- 2 Tissue Engineering and Surgical Research, Nationwide Children's Hospital , Columbus, Ohio
| | - Christopher K Breuer
- 2 Tissue Engineering and Surgical Research, Nationwide Children's Hospital , Columbus, Ohio
| | - Jed Johnson
- 3 Nanofiber Solutions, Inc. , Columbus, Ohio
| | - Narutoshi Hibino
- 1 Department of Cardiac Surgery, Johns Hopkins University , Baltimore, Maryland
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Best C, Tara S, Wiet M, Reinhardt J, Pepper V, Ball M, Yi T, Shinoka T, Breuer C. Deconstructing the Tissue Engineered Vascular Graft: Evaluating Scaffold Pre-Wetting, Conditioned Media Incubation, and Determining the Optimal Mononuclear Cell Source. ACS Biomater Sci Eng 2016; 3:1972-1979. [PMID: 29226239 DOI: 10.1021/acsbiomaterials.6b00123] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Stenosis limits widespread use of tissue-engineered vascular grafts (TEVGs), and bone marrow mononuclear cell (BM-MNC) seeding attenuates this complication. Yet seeding is a multistep process, and the singular effects of each component are unknown. We investigated which components of the clinical seeding protocol confer graft patency and sought to identify the optimal MNC source. Scaffolds composed of polyglycolic acid and ε-caprolactone/ι-lactic acid underwent conditioned media (CM) incubation (n = 25) and syngeneic BM-MNC (n = 9) or peripheral blood (PB)-MNC (n = 20) seeding. TEVGs were implanted for 2 weeks in the mouse IVC. CM incubation and PB-MNC seeding did not increase graft patency compared to control scaffolds prewet with PBS (n = 10), while BM-MNC seeding reduced stenosis by suppressing inflammation and smooth muscle cell, myofibroblast, and pericyte proliferation. IL-1β, IL-6, and TNFα were elevated in the seeded BM-MNC supernatant. Further, BM-MNC seeding reduced platelet activation in a dose-dependent manner, possibly contributing to TEVG patency.
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Affiliation(s)
- Cameron Best
- Tissue Engineering and Surgical Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio, United States
| | - Shuhei Tara
- Tissue Engineering and Surgical Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio, United States.,Department of Cardiovascular Medicine, Nippon Medical School, 1-1-5 Sendagi Bunkyo-ku, Tokyo, Japan
| | - Matthew Wiet
- Tissue Engineering and Surgical Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio, United States.,Department of Biomedical Engineering, College of Engineering, The Ohio State University, Columbus, Ohio, United States
| | - James Reinhardt
- Tissue Engineering and Surgical Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio, United States
| | - Victoria Pepper
- Tissue Engineering and Surgical Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio, United States.,Department of Surgery, Nationwide Children's Hospital, Columbus, Ohio, United States
| | - Matthew Ball
- Department of Pathology, The Ohio State University College of Medicine, Columbus, Ohio, United States
| | - Tai Yi
- Tissue Engineering and Surgical Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio, United States
| | - Toshiharu Shinoka
- Tissue Engineering and Surgical Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio, United States.,Department of Cardiothoracic Surgery, Nationwide Children's Hospital, Columbus, Ohio, United States
| | - Christopher Breuer
- Tissue Engineering and Surgical Research, The Research Institute at Nationwide Children's Hospital, Columbus, Ohio, United States.,Department of Surgery, Nationwide Children's Hospital, Columbus, Ohio, United States
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Nair RP, Joseph J, Harikrishnan VS, Krishnan VK, Krishnan L. Contribution of fibroblasts to the mechanical stability of in vitro engineered dermal-like tissue through extracellular matrix deposition. Biores Open Access 2014; 3:217-25. [PMID: 25371858 PMCID: PMC4215331 DOI: 10.1089/biores.2014.0023] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Tissue-engineered skin with mechanical and biological properties that match the native tissue could be a valuable graft to treat non-healing chronic wounds. Fibroblasts grown on a suitable biodegradable scaffold are a feasible strategy for the development of a dermal substitute above which epithelialization may occur naturally. Cell growth and phenotype maintenance are crucial to ensure the functional status of engineered tissue. In this study, an electrospun biodegradable polymer scaffold composed of a terpolymer PLGC [poly(lactide-glycolide-caprolactone)] with appropriate mechanical strength was used as a scaffold so that undesirable contraction of the wound could be prevented when it was implanted. To enhance cell growth, synthetic PLGC was incorporated with a fibrin-based biomimetic composite. The efficacy of the hybrid scaffold was evaluated by comparing it with bare PLGC in terms of fibroblast growth potential, extracellular matrix (ECM) deposition, polymer degradation, and mechanical strength. A significant increase was observed in fibroblast attachment, proliferation, and deposition of ECM proteins such as collagen and elastin in the hybrid scaffold. After growing fibroblasts for 20 d and 40 d, immunochemical staining of the decellularized scaffolds showed deposition of insoluble collagen and elastin on the hybrid scaffold but not on the bare scaffold. The loss of mechanical strength consequent to in vitro polymer degradation seemed to be balanced owing to the ECM deposition. Thus, tensile strength and elongation were better when cells were grown on the hybrid scaffold rather than the bare samples immersed in culture medium. Similar patterns of in vivo and in vitro degradation were observed during subcutaneous implantation and fibroblast culture, respectively. We therefore postulate that a hybrid scaffold comprising PLGC and fibrin is a potential candidate for the engineering of dermal tissue to be used in the regeneration of chronic wounds.
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Affiliation(s)
- Renjith P Nair
- Thrombosis Research Unit, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology , Trivandrum, India
| | - Jasmin Joseph
- Dental Products Laboratory, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology , Trivandrum, India
| | - V S Harikrishnan
- Division of Laboratory Animal Science, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology , Trivandrum, India
| | - V K Krishnan
- Dental Products Laboratory, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology , Trivandrum, India
| | - Lissy Krishnan
- Thrombosis Research Unit, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology , Trivandrum, India
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Roman S, Mangera A, Osman NI, Bullock AJ, Chapple CR, MacNeil S. Developing a tissue engineered repair material for treatment of stress urinary incontinence and pelvic organ prolapse-which cell source? Neurourol Urodyn 2013; 33:531-7. [PMID: 23868812 DOI: 10.1002/nau.22443] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2013] [Accepted: 05/08/2013] [Indexed: 12/24/2022]
Abstract
AIMS Synthetic non-absorbable meshes are widely used to augment surgical repair of stress urinary incontinence (SUI) and pelvic organ prolapse (POP); however, there is growing concern such meshes are associated with serious complications. This study compares the potential of two autologous cell sources for attachment and extra-cellular matrix (ECM) production on a biodegradable scaffold to develop tissue engineered repair material (TERM). METHODS Human oral fibroblasts (OF) and human adipose-derived stem cells (ADSC) were isolated and cultured on thermo-annealed poly-L-lactic acid (PLA) scaffolds for two weeks under either unrestrained conditions or restrained (either with or without intermittent stress) conditions. Samples were tested for cell metabolic activity (AlamarBlue® assay), contraction (serial photographs analyzed with image J software), total collagen production (Sirius red assay), and production of ECM components (immunostaining for collagen I, III, and elastin; and scanning electron microscopy) and biomechanical properties (BOSE tensiometer). Differences were statistically tested using two sample t-test. RESULTS Both cells showed good attachment and proliferation on scaffolds. Unrestrained scaffolds with ADSC produced more total collagen and a denser homogenous ECM than OF under same conditions. Restrained conditions (both with and without intermittent stress) gave similar total collagen production, but improved elastin production for both cells, particularly OF. The addition of any cell onto scaffolds led to an increase in biomechanical properties of scaffolds compared to unseeded scaffolds. CONCLUSIONS OF and ADSC both appear to be suitable cell types to combine with biodegradable scaffolds, in the development of a TERM for the treatment of SUI and POP. Neurourol. Urodynam. 33:531-537, 2014. © 2013 Wiley Periodicals, Inc.
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Affiliation(s)
- Sabiniano Roman
- Kroto Research Institute, Department of Materials Science and Engineering, University of Sheffield, Sheffield, UK
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Abstract
Potential applications of tissue engineering in regenerative medicine range from structural tissues to organs with complex function. This review focuses on the engineering of heart valve tissue, a goal which involves a unique combination of biological, engineering, and technological hurdles. We emphasize basic concepts, approaches and methods, progress made, and remaining challenges. To provide a framework for understanding the enabling scientific principles, we first examine the elements and features of normal heart valve functional structure, biomechanics, development, maturation, remodeling, and response to injury. Following a discussion of the fundamental principles of tissue engineering applicable to heart valves, we examine three approaches to achieving the goal of an engineered tissue heart valve: (1) cell seeding of biodegradable synthetic scaffolds, (2) cell seeding of processed tissue scaffolds, and (3) in-vivo repopulation by circulating endogenous cells of implanted substrates without prior in-vitro cell seeding. Lastly, we analyze challenges to the field and suggest future directions for both preclinical and translational (clinical) studies that will be needed to address key regulatory issues for safety and efficacy of the application of tissue engineering and regenerative approaches to heart valves. Although modest progress has been made toward the goal of a clinically useful tissue engineered heart valve, further success and ultimate human benefit will be dependent upon advances in biodegradable polymers and other scaffolds, cellular manipulation, strategies for rebuilding the extracellular matrix, and techniques to characterize and potentially non-invasively assess the speed and quality of tissue healing and remodeling.
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Affiliation(s)
- Karen Mendelson
- />Department of Pathology, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA USA
| | - Frederick J. Schoen
- />Department of Pathology, Brigham and Women’s Hospital and Harvard Medical School, Boston, MA USA
- />Department of Pathology, Brigham and Women’s Hospital, 75 Francis Street, Boston, MA 02115 USA
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