451
|
Fabrication of three-dimensional collagen scaffold using an inverse mould-leaching process. Bioprocess Biosyst Eng 2011; 34:903-11. [DOI: 10.1007/s00449-011-0541-z] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2011] [Accepted: 03/24/2011] [Indexed: 12/18/2022]
|
452
|
Ruderman G, Mogilner IG, Tolosa EJ, Massa N, Garavaglia M, Grigera JR. Ordered collagen membranes: production and characterization. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2011; 23:823-32. [PMID: 21396177 DOI: 10.1163/092050611x560942] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
A collagen membrane with microscopic order is presented. The membranes were produced with acid-soluble collagen, using two different methods to obtain orientation. The product was characterized by mean of UV and IR spectra, scanning electronic microscopy, optical microscopy and laser diffractometry. The results clearly show a high level of order in the membranes obtained by both techniques. Permeability for rifamycin, ascorbic acid and NaCl was also measured. Due to the characteristics of the membranes, they have a potential application for treatment of surface injuries.
Collapse
Affiliation(s)
- G Ruderman
- a Instituto de Física de Líquidos y Sistemasiológicos (IFLY SIB) CONICET-UNLP-CIC, La Plata, Argentina; Facultad de Ciencias Exactas UNLP, 59-789, c.c. 565, B1900BTE, La Plata, Argentina.
| | | | | | | | | | | |
Collapse
|
453
|
Zhou L, Pomerantseva I, Bassett EK, Bowley CM, Zhao X, Bichara DA, Kulig KM, Vacanti JP, Randolph MA, Sundback CA. Engineering ear constructs with a composite scaffold to maintain dimensions. Tissue Eng Part A 2011; 17:1573-81. [PMID: 21284558 DOI: 10.1089/ten.tea.2010.0627] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Engineered cartilage composed of a patient's own cells can become a feasible option for auricular reconstruction. However, distortion and shrinkage of ear-shaped constructs during scaffold degradation and neocartilage maturation in vivo have hindered the field. Scaffolds made of synthetic polymers often generate degradation products that cause an inflammatory reaction and negatively affect neocartilage formation in vivo. Porous collagen, a natural material, is a promising candidate; however, it cannot withstand the contractile forces exerted by skin and surrounding tissue during normal wound healing. We hypothesised that a permanent support in the form of a coiled wire embedded into a porous collagen scaffold will maintain the construct's size and ear-specific shape. Half-sized human adult ear-shaped fibrous collagen scaffolds with and without embedded coiled titanium wire were seeded with sheep auricular chondrocytes, cultured in vitro for up to 2 weeks, and implanted subcutaneously on the backs of nude mice. After 6 weeks, the dimensional changes in all implants with wire support were minimal (2.0% in length and 4.1% in width), whereas significant reduction in size occurred in the constructs without embedded wire (14.4% in length and 16.5% in width). No gross distortion occurred over the in vivo study period. There were no adverse effects on neocartilage formation from the embedded wire. Histologically, mature neocartilage extracellular matrix was observed throughout all implants. The amount of DNA, glycosaminoglycan, and hydroxyproline in the engineered cartilage were similar to that of native sheep ear cartilage. The embedded wire support was essential for avoiding shrinkage of the ear-shaped porous collagen constructs.
Collapse
Affiliation(s)
- Libin Zhou
- Department of Surgery, Massachusetts General Hospital, Boston, Massachusetts 02114, USA
| | | | | | | | | | | | | | | | | | | |
Collapse
|
454
|
A 3D Electroactive Polypyrrole-Collagen Fibrous Scaffold for Tissue Engineering. Polymers (Basel) 2011. [DOI: 10.3390/polym3010527] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
|
455
|
Ye Q, Harmsen MC, Ren Y, Bank RA. The role of collagen receptors Endo180 and DDR-2 in the foreign body reaction against non-crosslinked collagen and gelatin. Biomaterials 2011; 32:1339-50. [DOI: 10.1016/j.biomaterials.2010.09.076] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2010] [Accepted: 09/30/2010] [Indexed: 10/18/2022]
|
456
|
Kim BS, Park IK, Hoshiba T, Jiang HL, Choi YJ, Akaike T, Cho CS. Design of artificial extracellular matrices for tissue engineering. Prog Polym Sci 2011. [DOI: 10.1016/j.progpolymsci.2010.10.001] [Citation(s) in RCA: 207] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
|
457
|
Noll GA, Müller B, Ernst AM, Rüping B, Twyman RM, Prüfer D. Native and artificial forisomes: functions and applications. Appl Microbiol Biotechnol 2011; 89:1675-82. [PMID: 21286708 DOI: 10.1007/s00253-011-3117-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2010] [Revised: 01/03/2011] [Accepted: 01/03/2011] [Indexed: 01/07/2023]
Abstract
Forisomes are remarkable protein bodies found exclusively in the phloem of the Fabaceae. When the phloem is wounded, forisomes are converted from a condensed to a dispersed state in an ATP-independent reaction triggered by Ca(2+), thereby plugging the sieve tubes and preventing the loss of photoassimilates. Potentially, forisomes are ideal biomaterials for technical devices because the conformational changes can be replicated in vitro and are fully reversible over a large number of cycles. However, the development of technical devices based on forisomes has been hampered by the laborious and time-consuming process of purifying native forisomes from plants. More recently, the problem has been overcome by the production of recombinant artificial forisomes. This is a milestone in the development of forisome-based devices, not only because large quantities of homogeneous forisomes can be produced on demand, but also because their properties can be tailored for particular applications. In this review, we discuss the physical and molecular properties of native and artificial forisomes, focusing on their current applications in technical devices and potential developments in the future.
Collapse
Affiliation(s)
- Gundula A Noll
- Institut für Biologie und Biotechnologie der Pflanzen, Westfälische Wilhelms-Universität Münster, Münster, Germany
| | | | | | | | | | | |
Collapse
|
458
|
Serpooshan V, Muja N, Marelli B, Nazhat SN. Fibroblast contractility and growth in plastic compressed collagen gel scaffolds with microstructures correlated with hydraulic permeability. J Biomed Mater Res A 2011; 96:609-20. [DOI: 10.1002/jbm.a.33008] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2010] [Revised: 10/10/2010] [Accepted: 11/02/2010] [Indexed: 01/07/2023]
|
459
|
|
460
|
|
461
|
|
462
|
Fabrication of electrospun polycaprolactone biocomposites reinforced with chitosan for the proliferation of mesenchymal stem cells. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2010.09.002] [Citation(s) in RCA: 54] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
|
463
|
Kim G, Ahn S, Kim Y, Cho Y, Chun W. Coaxial structured collagen–alginate scaffolds: fabrication, physical properties, and biomedical application for skin tissue regeneration. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c0jm03452e] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
464
|
Chitosan: A Promising Biomaterial for Tissue Engineering Scaffolds. ADVANCES IN POLYMER SCIENCE 2011. [DOI: 10.1007/12_2011_112] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
|
465
|
|
466
|
Liang WH, Kienitz BL, Penick KJ, Welter JF, Zawodzinski TA, Baskaran H. Concentrated collagen-chondroitin sulfate scaffolds for tissue engineering applications. J Biomed Mater Res A 2010; 94:1050-60. [PMID: 20694972 DOI: 10.1002/jbm.a.32774] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Collagen-chondroitin sulfate biomaterial scaffolds have been used in a number of tissue-engineered products under development or in the clinics. In this article, we describe a new approach based on centrifugation for obtaining highly concentrated yet porous collagen scaffolds. Water uptake, chondroitin sulfate retention, morphology, mechanical properties, and tissue-engineering potential of the concentrated scaffolds were investigated. Our results show that the new approach can lead to scaffolds containing four times as much collagen as that in conventional unconcentrated scaffolds. Further, water uptake in the concentrated scaffolds was significantly greater while chondroitin sulfate retention in the concentrated scaffolds was unaffected. The value of mean pore diameter in the concentrated scaffolds was smaller than that in the unconcentrated scaffolds and the walls of the pores in the former comprised of a continuous sheet of collagen. The mechanical properties measured as moduli of elasticity in compression and tension were improved by as much as 30 times in the concentrated scaffolds. In addition, our tissue culture results with human mesenchymal stem cells and foreskin keratinocytes show that the new scaffolds can be used for cartilage and skin tissue-engineering applications.
Collapse
Affiliation(s)
- Wan-Hsiang Liang
- Department of Chemical Engineering, Case Western Reserve University, Cleveland, Ohio 44106, USA
| | | | | | | | | | | |
Collapse
|
467
|
Bone formation in ectopic and osteogenic tissue induced by a novel BMP-2-related peptide combined with rat tail collagen. BIOTECHNOL BIOPROC E 2010. [DOI: 10.1007/s12257-009-3130-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
|
468
|
Im DD, Kruger EA, Huang WR, Sayer G, Rudkin GH, Yamaguchi DT, Jarrahy R, Miller TA. Extracellular-Signal-Related Kinase 1/2 Is Responsible for Inhibition of Osteogenesis in Three-Dimensional Cultured MC3T3-E1 Cells. Tissue Eng Part A 2010; 16:3485-94. [DOI: 10.1089/ten.tea.2010.0222] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Daniel D. Im
- Plastic Surgery Laboratory, Veteran Affairs Greater Los Angeles Healthcare System, Los Angeles, California
- Division of Plastic Surgery, Department of Surgery, UCLA, Los Angeles, California
- Albert Einstein College of Medicine, Bronx, New York
| | - Erwin A. Kruger
- Plastic Surgery Laboratory, Veteran Affairs Greater Los Angeles Healthcare System, Los Angeles, California
- Division of Plastic Surgery, Department of Surgery, UCLA, Los Angeles, California
| | - Weibiao R. Huang
- Plastic Surgery Laboratory, Veteran Affairs Greater Los Angeles Healthcare System, Los Angeles, California
- Division of Plastic Surgery, Department of Surgery, UCLA, Los Angeles, California
| | - Gregory Sayer
- Plastic Surgery Laboratory, Veteran Affairs Greater Los Angeles Healthcare System, Los Angeles, California
- Division of Plastic Surgery, Department of Surgery, UCLA, Los Angeles, California
- David Geffen School of Medicine, UCLA, Los Angeles, California
| | - George H. Rudkin
- Plastic Surgery Laboratory, Veteran Affairs Greater Los Angeles Healthcare System, Los Angeles, California
- Division of Plastic Surgery, Department of Surgery, UCLA, Los Angeles, California
| | - Dean T. Yamaguchi
- Research Service, Veteran Affairs Greater Los Angeles Healthcare System, Los Angeles, California
| | - Reza Jarrahy
- Plastic Surgery Laboratory, Veteran Affairs Greater Los Angeles Healthcare System, Los Angeles, California
- Division of Plastic Surgery, Department of Surgery, UCLA, Los Angeles, California
| | - Timothy A. Miller
- Plastic Surgery Laboratory, Veteran Affairs Greater Los Angeles Healthcare System, Los Angeles, California
- Division of Plastic Surgery, Department of Surgery, UCLA, Los Angeles, California
| |
Collapse
|
469
|
Dutta RC, Dutta AK. Comprehension of ECM-Cell dynamics: A prerequisite for tissue regeneration. Biotechnol Adv 2010; 28:764-9. [DOI: 10.1016/j.biotechadv.2010.06.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2010] [Revised: 06/05/2010] [Accepted: 06/12/2010] [Indexed: 12/12/2022]
|
470
|
Serpooshan V, Julien M, Nguyen O, Wang H, Li A, Muja N, Henderson JE, Nazhat SN. Reduced hydraulic permeability of three-dimensional collagen scaffolds attenuates gel contraction and promotes the growth and differentiation of mesenchymal stem cells. Acta Biomater 2010; 6:3978-87. [PMID: 20451675 DOI: 10.1016/j.actbio.2010.04.028] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2010] [Revised: 04/28/2010] [Accepted: 04/30/2010] [Indexed: 12/29/2022]
Abstract
Optimal scaffold characteristics are essential for the therapeutic application of engineered tissues. Hydraulic permeability (k) affects many properties of collagen gels, such as mechanical properties, cell-scaffold interactions within three dimensions (3D), oxygen flow and nutrient diffusion. However, the cellular response to 3D gel scaffolds of defined k values has not been investigated. In this study, unconfined plastic compression under increasing load was used to produce collagen gels with increasing solid volume fractions. The Happel model was used to calculate the resulting permeability values in order to study the interaction of k with gel mechanical properties and mesenchymal stem cell (MSC)-induced gel contraction, metabolism and differentiation in both non-osteogenic (basal medium) and osteogenic medium for up to 3 weeks. Collagen gels of fibrillar densities ranging from 0.3 to >4.1 wt.% gave corresponding k values that ranged from 1.00 to 0.03 microm(2). Mechanical testing under compression showed that the collagen scaffold modulus increased with collagen fibrillar density and a decrease in k value. MSC-induced gel contraction decreased as a direct function of decreasing k value. Relative to osteogenic conditions, non-osteogenic MSC cultures exhibited a more than 2-fold increase in gel contraction. MSC metabolic activity increased similarly under both osteogenic and non-osteogenic culture conditions for all levels of plastic compression. Under osteogenic conditions MSC differentiation and mineralization, as indicated by alkaline phosphatase activity and von Kossa staining, respectively, increased in response to an elevation in collagen fibrillar density and decreased gel permeability. In this study, gel scaffolds with higher collagen fibrillar densities and corresponding lower k values provided a greater potential for MSC differentiation and appear most promising for bone grafting purposes. Thus, cell-scaffold interactions can be optimized by defining the 3D properties of collagen scaffolds through k adjustment.
Collapse
|
471
|
Ahmed TAE, Hincke MT. Strategies for articular cartilage lesion repair and functional restoration. TISSUE ENGINEERING PART B-REVIEWS 2010; 16:305-29. [PMID: 20025455 DOI: 10.1089/ten.teb.2009.0590] [Citation(s) in RCA: 181] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Injury of articular cartilage due to trauma or pathological conditions is the major cause of disability worldwide, especially in North America. The increasing number of patients suffering from joint-related conditions leads to a concomitant increase in the economic burden. In this review article, we focus on strategies to repair and replace knee joint cartilage, since knee-associated disabilities are more prevalent than any other joint. Because of inadequacies associated with widely used approaches, the orthopedic community has an increasing tendency to develop biological strategies, which include transplantation of autologous (i.e., mosaicplasty) or allogeneic osteochondral grafts, autologous chondrocytes (autologous chondrocyte transplantation), or tissue-engineered cartilage substitutes. Tissue-engineered cartilage constructs represent a highly promising treatment option for knee injury as they mimic the biomechanical environment of the native cartilage and have superior integration capabilities. Currently, a wide range of tissue-engineering-based strategies are established and investigated clinically as an alternative to the routinely used techniques (i.e., knee replacement and autologous chondrocyte transplantation). Tissue-engineering-based strategies include implantation of autologous chondrocytes in combination with collagen I, collagen I/III (matrix-induced autologous chondrocyte implantation), HYAFF 11 (Hyalograft C), and fibrin glue (Tissucol) or implantation of minced cartilage in combination with copolymers of polyglycolic acid along with polycaprolactone (cartilage autograft implantation system), and fibrin glue (DeNovo NT graft). Tissue-engineered cartilage replacements show better clinical outcomes in the short term, and with advances that have been made in orthopedics they can be introduced arthroscopically in a minimally invasive fashion. Thus, the future is bright for this innovative approach to restore function.
Collapse
Affiliation(s)
- Tamer A E Ahmed
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Ontario, Canada
| | | |
Collapse
|
472
|
Chieh HF, Sun Y, Liao JD, Su FC, Zhao C, Amadio PC, An KN. Effects of cell concentration and collagen concentration on contraction kinetics and mechanical properties in a bone marrow stromal cell-collagen construct. J Biomed Mater Res A 2010; 93:1132-9. [PMID: 19768794 DOI: 10.1002/jbm.a.32606] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
A cell-collagen construct is commonly used to investigate the phenomenon of wound healing and to estimate the variables for tissue engineering. The purpose of this study was to assess the effects of cell concentration and collagen concentration on the contraction kinetics and mechanical properties of bone marrow stromal cell (BMSC) seeded collagen lattices. To investigate the effects of both variables on the contraction kinetics, the construct contraction was monitored up to 13 days. Incremental stress- relaxation tests were carried out after a 2-week incubation to obtain the stress-strain profiles, which were subsequently assessed in a quasilinear viscoelastic (QLV) model. During contraction, aligned BMSCs were observed first in the interior portion of the ring, followed by the middle portion and finally in the exterior portion. Constructs seeded with a higher initial cell concentration (higher than 1 x 10(5) cells/mL) or lower initial collagen concentration (lower than 2 mg/mL) exhibited faster contraction, higher ultimate stress, and superior elasticity and reduced relaxation behavior (p < 0.05). The cell-collagen model was successfully used to yield information regarding the initial cell concentration and the initial collagen concentration on contraction kinetics and mechanical behavior, which may have possible application in tissue engineering.
Collapse
Affiliation(s)
- Hsiao-Feng Chieh
- Biomechanics Laboratory, Division of Orthopedic Research, Mayo Clinic, Rochester, Minnesota, USA
| | | | | | | | | | | | | |
Collapse
|
473
|
Teixeira S, Fernandes H, Leusink A, van Blitterswijk C, Ferraz MP, Monteiro FJ, de Boer J. In vivo evaluation of highly macroporous ceramic scaffolds for bone tissue engineering. J Biomed Mater Res A 2010; 93:567-75. [PMID: 19591232 DOI: 10.1002/jbm.a.32532] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
During the last decades, different materials of both natural and synthetic origin have been developed with the aim of inducing and controlling osteogenic differentiation of mesenchymal stem cells (MSCs). In order for that to happen, it is necessary that the material to be implanted obey a series of requirements, namely: osteoconduction, biocompatibility, and biodegradability. Additionally, they must be low-priced, easy to produce, shape, and store. Hydroxyapatite (HA) is a well known ceramic with a composition similar to the mineral component of bone and is highly biocompatible and easy to obtain and/or process. On the other hand, collagen is the main structural protein present in the human body and bone. In this study, a polymer replication method was applied and a highly porous HA scaffold was produced. Collagen was later incorporated to improve the biological properties of the scaffold while resembling the bone composition. The scaffolds were characterized by means of scanning electron microscopy, Fourier transform infrared spectroscopy and energy dispersive spectroscopy. In vitro and in vivo testing was performed in all scaffolds produced. The goal of this study was to evaluate the in vivo osteogenic potential of MSCs from two different species seeded on the different HA basedporous scaffolds with collagen type I. The resultsindicate that all scaffolds exhibit relevant bone formation, being more prominent in the case of the HA scaffolds.
Collapse
Affiliation(s)
- S Teixeira
- INEB-Instituto de Engenharia Biomédica, Laboratório de Biomaterials, Rua do Campo Alegre, 823, 4150-180 Porto, Portugal.
| | | | | | | | | | | | | |
Collapse
|
474
|
Pedraza CE, Marelli B, Chicatun F, McKee MD, Nazhat SN. An in vitro assessment of a cell-containing collagenous extracellular matrix-like scaffold for bone tissue engineering. Tissue Eng Part A 2010; 16:781-93. [PMID: 19778181 DOI: 10.1089/ten.tea.2009.0351] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
Abstract
Extracellular matrix (ECM) consists of a complex mixture of macromolecules such as collagens, proteoglycans, glycoproteins, and elastic fibers. ECM is essential to preserving tissue architecture, signaling to cells, and regulating calcification in mineralized tissues. Osteoblasts in culture secrete and assemble an extensive ECM rich in type I collagen, and other noncollagenous proteins that can be mineralized. Three-dimensional matrix models can be used in vitro to most appropriately resemble the geometry and biochemistry of natural ECMs. In the present study, MC3T3-E1 mouse calvarial preosteoblasts were cultured within a dense three-dimensional collagenous ECM-like scaffold produced through the method of plastic compression. Plastic compression rapidly produces scaffolds of collagen density approaching native tissue levels with enhanced biomechanical properties while maintaining the viability of resident cells. The proliferation, morphology, and gene expression of seeded MC3T3s, as well as collagen production and matrix mineralization, were investigated for up to 7 weeks in culture. Soluble collagen secretion ranged in concentration from 5 to 30 microg/mL over a 24-h period, concomitant with a steady rate of collagen mRNA expression. Expression of osteogenic markers such as tissue-nonspecific alkaline phosphatase (Alpl), bone sialoprotein (Bsp), and osteopontin (Opn) examined by biochemical assay and reverse transcription-polymerase chain reaction demonstrated cell differentiation. Pericellular voids of ECM around cells, together with evidence of MMP13 mRNA expression, suggested matrix remodeling. Ultrastructural analyses, X-ray microanalysis, micro-computed tomography, as well as Fourier-transform infrared and imaging all confirmed the formation of a calcium-phosphate mineral phase within the fibrillar collagen matrix. In conclusion, preosteoblastic MC3T3 cells seeded within an ECM-like dense collagen scaffold secrete matrix proteins and induce scaffold mineralization in a manner potentially appropriate for bone tissue engineering uses.
Collapse
|
475
|
Wei Tan, Twomey J, Dongjie Guo, Madhavan K, Min Li. Evaluation of Nanostructural, Mechanical, and Biological Properties of Collagen–Nanotube Composites. IEEE Trans Nanobioscience 2010; 9:111-20. [DOI: 10.1109/tnb.2010.2043367] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
476
|
Przybyla DE, Chmielewski J. Higher-Order Assembly of Collagen Peptides into Nano- and Microscale Materials. Biochemistry 2010; 49:4411-9. [PMID: 20415447 DOI: 10.1021/bi902129p] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- David E. Przybyla
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907
| | - Jean Chmielewski
- Department of Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907
- Weldon School of Biomedical Engineering, Purdue University, 206 South Martin Jischke Drive, West Lafayette, Indiana 47907
| |
Collapse
|
477
|
Nezu T, Taira M, Saitoh S, Sasaki K, Araki Y. Viscoelastic adlayers of collagen and lysozyme studied using quartz crystal microbalance with dissipation monitoring. Int J Biol Macromol 2010; 46:396-403. [DOI: 10.1016/j.ijbiomac.2010.02.005] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2009] [Revised: 02/03/2010] [Accepted: 02/03/2010] [Indexed: 11/29/2022]
|
478
|
Porter JR, Ruckh TT, Popat KC. Bone tissue engineering: a review in bone biomimetics and drug delivery strategies. Biotechnol Prog 2010; 25:1539-60. [PMID: 19824042 DOI: 10.1002/btpr.246] [Citation(s) in RCA: 195] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
Critical-sized defects in bone, whether induced by primary tumor resection, trauma, or selective surgery have in many cases presented insurmountable challenges to the current gold standard treatment for bone repair. The primary purpose of a tissue-engineered scaffold is to use engineering principles to incite and promote the natural healing process of bone which does not occur in critical-sized defects. A synthetic bone scaffold must be biocompatible, biodegradable to allow native tissue integration, and mimic the multidimensional hierarchical structure of native bone. In addition to being physically and chemically biomimetic, an ideal scaffold is capable of eluting bioactive molecules (e.g., BMPs, TGF-betas, etc., to accelerate extracellular matrix production and tissue integration) or drugs (e.g., antibiotics, cisplatin, etc., to prevent undesired biological response such as sepsis or cancer recurrence) in a temporally and spatially controlled manner. Various biomaterials including ceramics, metals, polymers, and composites have been investigated for their potential as bone scaffold materials. However, due to their tunable physiochemical properties, biocompatibility, and controllable biodegradability, polymers have emerged as the principal material in bone tissue engineering. This article briefly reviews the physiological and anatomical characteristics of native bone, describes key technologies in mimicking the physical and chemical environment of bone using synthetic materials, and provides an overview of local drug delivery as it pertains to bone tissue engineering is included.
Collapse
Affiliation(s)
- Joshua R Porter
- Department of Mechanical Engineering, School of Biomedical Engineering, Colorado State University, Fort Collins, CO 80523, USA
| | | | | |
Collapse
|
479
|
Kimura Y, Tsuji W, Yamashiro H, Toi M, Inamoto T, Tabata Y. In situ adipogenesis in fat tissue augmented by collagen scaffold with gelatin microspheres containing basic fibroblast growth factor. J Tissue Eng Regen Med 2010; 4:55-61. [PMID: 19830791 DOI: 10.1002/term.218] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
In situ adipose tissue regeneration in fat tissue by collagen sponges and gelatin microspheres containing basic fibroblast growth factor (bFGF) was investigated. A minced collagen sponge scaffold (1 ml) was incorporated with microspheres containing 10 microg bFGF and administered into a defect of rabbit fat tissues. Adipogenesis at the administered site was evaluated histologically. The adipose tissue regeneration induced by the administration of mixed collagen scaffold and microspheres containing bFGF was significantly stronger than that of either collagen scaffold alone or microspheres containing bFGF alone. The histological area of in situ adipogenesis by the mixed collagen scaffold and microspheres containing bFGF was enhanced over time by repeated administration. It is concluded that the repeated administration of collagen scaffold and microspheres containing bFGF is a promising way to achieve adipose tissue regeneration inside inherent fat tissue. This technique might be applicable for the reconstruction of volume contour deformities by trauma or surgical interventions of adipose tissue in a minimally invasive manner.
Collapse
Affiliation(s)
- Yu Kimura
- Department of Biomaterials, Institute for Frontier Medical Sciences, Kyoto University, Japan
| | | | | | | | | | | |
Collapse
|
480
|
Yadavalli VK, Svintradze DV, Pidaparti RM. Nanoscale measurements of the assembly of collagen to fibrils. Int J Biol Macromol 2010; 46:458-64. [PMID: 20206203 DOI: 10.1016/j.ijbiomac.2010.02.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2010] [Revised: 02/23/2010] [Accepted: 02/24/2010] [Indexed: 10/19/2022]
Abstract
Observing the self-assembly of collagen from single collagen monomers to higher order fibrils and fibers provides a bottom-up approach to engineering its ultrastructure in comparison to structural studies of already formed collagen fibers. This approach can be used for the fabrication of controlled collagen-based biomaterials with varying mechanical properties. Here, we investigate the time-dependent self-assembly of collagen into single fibrils in vitro through high resolution imaging of collagen type 1 prior to fibrillogenesis. This was confirmed by comparing persistence length and diameter in controlled experiments and studying the morphology and mechanical properties of nanoscale collagen fibrils through AFM nanoindentation measurements. The Young's modulus of these collagen fibrils was estimated to be around 1GPa in the dehydrated state. The stability and mechanical characteristics of collagen obtained in these experiments indicate the hierarchical assembly occurs at both a structural and mechanical level.
Collapse
Affiliation(s)
- Vamsi K Yadavalli
- Department of Chemical and Life Science Engineering, Virginia Commonwealth University, Richmond, 23284, United States.
| | | | | |
Collapse
|
481
|
Bax DV, McKenzie DR, Weiss AS, Bilek MM. The linker-free covalent attachment of collagen to plasma immersion ion implantation treated polytetrafluoroethylene and subsequent cell-binding activity. Biomaterials 2010; 31:2526-34. [DOI: 10.1016/j.biomaterials.2009.12.009] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2009] [Accepted: 12/03/2009] [Indexed: 01/07/2023]
|
482
|
A tissue-engineered approach towards retinal repair: scaffolds for cell transplantation to the subretinal space. Graefes Arch Clin Exp Ophthalmol 2010; 248:763-78. [PMID: 20169358 DOI: 10.1007/s00417-009-1263-7] [Citation(s) in RCA: 108] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2009] [Revised: 11/16/2009] [Accepted: 11/26/2009] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Several mechanisms of retina degeneration result in the deterioration of the outer retina and can lead to blindness. Currently, with the exception of anti-angiogenic treatments for wet age-related macular degeneration, there are no treatments that can restore lost vision. There is evidence that photoreceptors and embryonic retinal tissue, transplanted to the subretinal space, can form new synapses with surviving host neurons. However, these transplants have yet to result in a clinical treatment for retinal degeneration. METHODS This article reviews the current literature on the transplantation of scaffolds with retinal and retinal pigmented epithelial (RPE) cells to the subretinal space. We discuss the types of cells and materials that have been investigated for transplantation to the subretinal space, summarize the current findings, and present opportunities for future research and the next generation of scaffolds for retinal repair. RESULTS Challenges to cell transplantation include limited survival upon implantation and the formation of abnormal cell architectures in vivo. Scaffolds have been shown to enhance cell survival and direct cell differentiation and organization in a number of models of retinal degeneration. CONCLUSIONS The transplantation of cells within a scaffold represents a possible treatment to repair retinal degeneration and restore vision in effected patients. Materials have been developed for the delivery of retinal and RPE cells separately however, the development of a combined tissue-engineered scaffold targeting both cell populations represents a promising direction for retinal repair.
Collapse
|
483
|
Wang L, Stegemann JP. Thermogelling chitosan and collagen composite hydrogels initiated with beta-glycerophosphate for bone tissue engineering. Biomaterials 2010; 31:3976-85. [PMID: 20170955 DOI: 10.1016/j.biomaterials.2010.01.131] [Citation(s) in RCA: 200] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Accepted: 01/22/2010] [Indexed: 01/10/2023]
Abstract
Chitosan and collagen type I are naturally derived materials used as cell carriers because of their ability to mimic the extracellular environment and direct cell function. In this study beta-glycerophosphate (beta-GP), an osteogenic medium supplement and a weak base, was used to simultaneously initiate gelation of pure chitosan, pure collagen, and chitosan-collagen composite materials at physiological pH and temperature. Adult human bone marrow-derived stem cells (hBMSC) encapsulated in such hydrogels at chitosan/collagen ratios of 100/0, 65/35, 25/75, and 0/100 wt% exhibited high viability at day 1 after encapsulation, but DNA content dropped by about half over 12 days in pure chitosan materials while it increased twofold in materials containing collagen. Collagen-containing materials compacted more strongly and were significantly stiffer than pure chitosan gels. In monolayer culture, exposure of hBMSC to beta-GP resulted in decreased cell metabolic activity that varied with concentration and exposure time, but washing effectively removed excess beta-GP from hydrogels. The presence of chitosan in materials resulted in higher expression of osterix and bone sialoprotein genes in medium with and without osteogenic supplements. Chitosan also increased alkaline phosphatase activity and calcium deposition in osteogenic medium. Chitosan-collagen composite materials have potential as matrices for cell encapsulation and delivery, or as in situ gel-forming materials for tissue repair.
Collapse
Affiliation(s)
- Limin Wang
- Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI 48109, USA
| | | |
Collapse
|
484
|
Grant CA, Brockwell DJ, Radford SE, Thomson NH. Tuning the elastic modulus of hydrated collagen fibrils. Biophys J 2010; 97:2985-92. [PMID: 19948128 DOI: 10.1016/j.bpj.2009.09.010] [Citation(s) in RCA: 105] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2009] [Revised: 08/10/2009] [Accepted: 09/03/2009] [Indexed: 10/20/2022] Open
Abstract
Systematic variation of solution conditions reveals that the elastic modulus (E) of individual collagen fibrils can be varied over a range of 2-200 MPa. Nanoindentation of reconstituted bovine Achilles tendon fibrils by atomic force microscopy (AFM) under different aqueous and ethanol environments was carried out. Titration of monovalent salts up to a concentration of 1 M at pH 7 causes E to increase from 2 to 5 MPa. This stiffening effect is more pronounced at lower pH where, at pH 5, e.g., there is an approximately 7-fold increase in modulus on addition of 1 M KCl. An even larger increase in modulus, up to approximately 200 MPa, can be achieved by using increasing concentrations of ethanol. Taken together, these results indicate that there are a number of intermolecular forces between tropocollagen monomers that govern the elastic response. These include hydration forces and hydrogen bonding, ion pairs, and possibly the hydrophobic effect. Tuning of the relative strengths of these forces allows rational tuning of the elastic modulus of the fibrils.
Collapse
Affiliation(s)
- Colin A Grant
- Astbury Centre for Structural Molecular Biology, Institute of Molecular and Cellular Biology, University of Leeds, Leeds, United Kingdom
| | | | | | | |
Collapse
|
485
|
Galler KM, D'Souza RN, Hartgerink JD. Biomaterials and their potential applications for dental tissue engineering. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm01207f] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
|
486
|
von der Mark K, Park J, Bauer S, Schmuki P. Nanoscale engineering of biomimetic surfaces: cues from the extracellular matrix. Cell Tissue Res 2009; 339:131-53. [DOI: 10.1007/s00441-009-0896-5] [Citation(s) in RCA: 280] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2009] [Accepted: 10/08/2009] [Indexed: 11/29/2022]
|
487
|
Stein H, Wilensky M, Tsafrir Y, Rosenthal M, Amir R, Avraham T, Ofir K, Dgany O, Yayon A, Shoseyov O. Production of bioactive, post-translationally modified, heterotrimeric, human recombinant type-I collagen in transgenic tobacco. Biomacromolecules 2009; 10:2640-5. [PMID: 19678700 DOI: 10.1021/bm900571b] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Collagen's biocompatibility, biodegradability and low immunogenicity render it advantageous for extensive application in pharmaceutical or biotechnological disciplines. However, typical collagen extraction from animal or cadaver sources harbors risks including allergenicity and potential sample contamination with pathogens. In this work, two human genes encoding recombinant heterotrimeric collagen type I (rhCOL1) were successfully coexpressed in tobacco plants with the human prolyl-4-hydroxylase (P4H) and lysyl hydroxylase 3 (LH3) enzymes, responsible for key posttranslational modifications of collagen. Plants coexpressing all five vacuole-targeted proteins generated intact procollagen yields of approximately 2% of the extracted total soluble proteins. Plant-extracted rhCOL1 formed thermally stable triple helical structures and demonstrated biofunctionality similar to human tissue-derived collagen supporting binding and proliferation of adult peripheral blood-derived endothelial progenitor-like cells. Through a simple, safe and scalable method of rhCOL1 production and purification from tobacco plants, this work broadens the potential applications of human recombinant collagen in regenerative medicine.
Collapse
Affiliation(s)
- Hanan Stein
- Collplant Ltd., 3 Sapir St, Weizmann Science Park, PO Box 4132, Ness-Ziona 74140, Israel
| | | | | | | | | | | | | | | | | | | |
Collapse
|
488
|
Ma X, Wu X, Wu Y, Liu J, Xiong Z, Lv R, Yan Y, Wang J, Li D. Posterolateral Spinal Fusion in Rabbits Using a RP-based PLGA/ TCP/Col/BMSCs-OB Biomimetic Grafting Material. J BIOACT COMPAT POL 2009. [DOI: 10.1177/0883911509343497] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Three-dimensional highly porous poly(DL-lactic-co-glycolic acid)/ tricalcium phosphate (PLGA/TCP) scaffolds were fabricated using a rapid prototyping technique (RP). The 3D rhombic lamellar PLGA/TCP carriers (20 mm × 20 mm × 3 mm) subsequently were coated with collagen type I (Col) to produce PLGA/TCP/Col composites. Both the RP-based PLGA/TCP scaffolds and the PLGA/TCP/Col composites were observed by scanning electron microscopy. Forty New Zealand white rabbits were equally randomized into 2 groups (group A and group B) and bilaterally underwent posterolateral intertransverse process arthrodesis at the L4—L5 level using the following graft materials: In group A, PLGA/TCP/Col/BMSCs-OB composites (on the right side, group A1, n = 20) and autogenous iliac bone grafts (on the left side, group A2, n = 20) were used; In group B, PLGA/TCP scaffolds plus fresh autogenous bone marrow (on the right side, group B1, n = 20) and PLGA/TCP scaffolds alone (on the left side, group B2, n = 20) were utilized. In group A1, rabbit bone marrow stromal cells (BMSCs) were isolated and cultured under the osteogenic conditions (BMSCs-OB). Structural PLGA/TCP/Col composites then were efficiently loaded with BMSCs-OB and cultured 5 days to make PLGA/TCP/ Col/BMSCs-OB biomaterials. Rabbits were sacrificed after 12-week follow-up and the spinal fusion were evaluated by a general observation, a manual palpation test, histological analyses and radiography. As a result, RP established PLGA/TCP scaffolds with appropriate biomaterial properties including satisfactory microstructure, inter-connectivity and porosity. Modifications to the structural highly porous PLGA/TCP scaffolds with Col (PLGA/TCP/Col) essentially increased the affinity of the carriers to seeding cells. In group A1, radiological evaluation revealed strong ability of new bone formation and bony fusion in the implanted sites and histological analyses showed highly cellular bone marrow between the newly formed trabecular bone was present in the fusion mass. In group A2, there was a reduced amount of newly formed bone. In group B1, only a few bony fusions were obtained. In group B2, PLGA/TCP scaffolds were biocompatible and biodegradable; whereas, no newly formed bone or bony fusion was found. Twelve weeks after surgery, spinal fusion rates in groups of A1, A2, B1, and B2 were 70.0%(14/20), 45.0%(9/20), 15.8%(3/19), and 0%(0/19), respectively. The rates of fusion were significantly higher in groups of A1 and A2 compared with groups of B1 and B2 (p<0.01), and there was no significant difference of fusion rate between group A1 and group A2 (p>0.05). Therefore, RP-based 3D PLGA/TCP/Col/BMSCs-OB biomaterial holds promise as a bone grafting substitute for spinal fusion. Our attempts may provide a novel method for biofabrication of the bionic construct.
Collapse
Affiliation(s)
- Xing Ma
- Department of Orthopaedics, The First Affiliated Hospital of Medical School Xi'an Jiaotong University, Xi'an 710061, PR China, Institute of Orthopaedic Surgery & Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an 710032, PR China
| | - Xiaoming Wu
- Department of Biomedical Engineering, The Fourth Military Medical University, Xi'an 710032, PR China
| | - Yaoping Wu
- Institute of Orthopaedic Surgery & Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an 710032, PR China
| | - Jian Liu
- Institute of Orthopaedic Surgery & Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an 710032, PR China,
| | - Zhuo Xiong
- Department of Mechanical Engineering, Tsinghua University Beijing 100084, PR China
| | - Rong Lv
- Institute of Orthopaedic Surgery & Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an 710032, PR China
| | - Yongnian Yan
- Department of Mechanical Engineering, Tsinghua University Beijing 100084, PR China
| | - Jun Wang
- Institute of Orthopaedic Surgery & Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an 710032, PR China
| | - Dan Li
- Institute of Orthopaedic Surgery & Department of Orthopaedics, Xijing Hospital, The Fourth Military Medical University, Xi'an 710032, PR China
| |
Collapse
|
489
|
Zheng L, Sun J, Chen X, Wang G, Jiang B, Fan H, Zhang X. In Vivo Cartilage Engineering with Collagen Hydrogel and Allogenous Chondrocytes After Diffusion Chamber Implantation in Immunocompetent Host. Tissue Eng Part A 2009; 15:2145-53. [DOI: 10.1089/ten.tea.2008.0268] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Li Zheng
- Engineering Research Centre in Biomaterials, Sichuan University, Chengdu, Sichuan, China
| | - Jin Sun
- College of Chemical Engineering, Sichuan University, Chengdu, Sichuan, China
| | - XueNing Chen
- Engineering Research Centre in Biomaterials, Sichuan University, Chengdu, Sichuan, China
| | - Gang Wang
- Engineering Research Centre in Biomaterials, Sichuan University, Chengdu, Sichuan, China
| | - Bo Jiang
- Engineering Research Centre in Biomaterials, Sichuan University, Chengdu, Sichuan, China
| | - HongSong Fan
- Engineering Research Centre in Biomaterials, Sichuan University, Chengdu, Sichuan, China
| | - XingDong Zhang
- Engineering Research Centre in Biomaterials, Sichuan University, Chengdu, Sichuan, China
| |
Collapse
|
490
|
Aoki K, Usui Y, Narita N, Ogiwara N, Iashigaki N, Nakamura K, Kato H, Sano K, Ogiwara N, Kametani K, Kim C, Taruta S, Kim YA, Endo M, Saito N. A thin carbon-fiber web as a scaffold for bone-tissue regeneration. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2009; 5:1540-1546. [PMID: 19334009 DOI: 10.1002/smll.200801610] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Due to the rapid progress being made in tissue regeneration therapy, biomaterials used as scaffolds are expected to play an important role in future clinical application. We report the development of a 3D web (sheet) consisting of high-purity carbon fibers in a nanoscale structure. When the thin carbon-fiber web (TCFW) and recombinant human bone morphogenetic protein 2 (rhBMP-2) composite is implanted in the murine back muscle, new ectopic bone is formed, and the values of the bone mineral content and bone mineral density are significantly higher than those obtained with a collagen sheet. Observation of the interface between the carbon fibers and bone matrix reveal that the fibers are directly integrated into the bone matrix, indicating high bone-tissue compatibility. Further, the rhBMP-2/TCFW composite repairs a critical-size bone defect within a short time period. These results suggest that the TCFW functions as an effective scaffold material and will play an important role in tissue regeneration in the future.
Collapse
Affiliation(s)
- Kaoru Aoki
- Department of Orthopaedic Surgery, Shinshu University School of Medicine, Matsumoto, Nagano 390-8621, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
491
|
Ramachandra TV, Mahapatra DM, B K, Gordon R. Milking Diatoms for Sustainable Energy: Biochemical Engineering versus Gasoline-Secreting Diatom Solar Panels. Ind Eng Chem Res 2009. [DOI: 10.1021/ie900044j] [Citation(s) in RCA: 151] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Affiliation(s)
- T. V. Ramachandra
- Energy & Wetlands Research Group, Centre for Ecological Sciences/Centre for Sustainable Technologies, Indian Institute of Science, Bangalore 560 012, India
| | - Durga Madhab Mahapatra
- Energy & Wetlands Research Group, Centre for Ecological Sciences/Centre for Sustainable Technologies, Indian Institute of Science, Bangalore 560 012, India
| | - Karthick B
- Energy & Wetlands Research Group, Centre for Ecological Sciences/Centre for Sustainable Technologies, Indian Institute of Science, Bangalore 560 012, India
| | - Richard Gordon
- Department of Radiology, University of Manitoba, Room GA216, HSC, 820 Sherbrook Street, Winnipeg MB R3A 1R9, Canada
| |
Collapse
|
492
|
Ma X, Wu X, Hu Y, Xiong Z, Lv R, Wang J, Li D, Yan Y. Intervertebral Spinal Fusion Using a RP-based PLGA/TCP/bBMP Biomimetic Grafting Material. J BIOACT COMPAT POL 2009. [DOI: 10.1177/0883911509103830] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Three-dimensional highly porous poly(DL-lactic-co-glycolic acid)/tricalcium phosphate (PLGA/TCP) scaffolds were synthesized via a rapid prototyping (RP) technique. Bovine bone morphogenetic protein (bBMP) was loaded into the biopolymer scaffolds (PLGA/TCP/bBMP). Both the PLGA/TCP scaffolds and the PLGA/TCP/bBMP composites were evaluated by scanning electron microscopy. Lumbar intervertebral body fusion at L2~3 and L4~5 levels were performed on 15 goats using one of the following graft materials: RP synthesized PLGA/TCP scaffolds (group A), PLGA/TCP/bBMP composites (group B), and autogenous iliac bone graft (group C). All animals were sacrificed 24 weeks after surgery and the spine fusions evaluated by manual palpation tests, histological analyses, and radiography. In group A, the histological analyses showed that the PLGA/TCP scaffolds were biocompatible and biodegradable; however, no new bone was found. In group B, highly cellular bone marrow between the new trabecular bone was present in the fusion mass. In group C, there was a lesser amount of new bone. Twenty-four weeks after surgery, the fusion rate of lumbar intervertebral body fusion in group A, B, and C was 10% (1/10), 80% (8/10), and 50% (5/10), respectively. The fusion rate was significantly higher in group B compared with groups of A and C (p<0.01). Based on these results, extracted bBMP can be loaded in vitro into RP-based highly porous structural PLGA/TCP scaffolds to fabricate new graft composites that appear to be more effective for intervertebral spinal fusions. This biomimetic artificial grafting material holds promise as a tool for spine surgery.
Collapse
Affiliation(s)
- Xing Ma
- Department of Orthopaedics, The First Affiliated Hospital of Medical School Xi'an Jiaotong University, Xi'an 710061, PR China
- Institute of Orthopaedic Surgery & Department of Orthopaedics Xijing Hospital, The Fourth Military Medical University Xi'an 710032, PR China
| | - Xiaoming Wu
- Department of Biomedical Engineering, The Fourth Military Medical University, Xi'an 710032, PR China
| | - Yunyu Hu
- Institute of Orthopaedic Surgery & Department of Orthopaedics Xijing Hospital, The Fourth Military Medical University Xi'an 710032, PR China
| | - Zhuo Xiong
- Department of Mechanical Engineering, Tsinghua University Beijing 100084, PR China
| | - Rong Lv
- Institute of Orthopaedic Surgery & Department of Orthopaedics Xijing Hospital, The Fourth Military Medical University Xi'an 710032, PR China
| | - Jun Wang
- Institute of Orthopaedic Surgery & Department of Orthopaedics Xijing Hospital, The Fourth Military Medical University Xi'an 710032, PR China
| | - Dan Li
- Institute of Orthopaedic Surgery & Department of Orthopaedics Xijing Hospital, The Fourth Military Medical University Xi'an 710032, PR China
| | - Yongnian Yan
- Department of Mechanical Engineering, Tsinghua University Beijing 100084, PR China
| |
Collapse
|
493
|
|
494
|
Athanasiou KA, Almarza AJ, Detamore MS, Kalpakci KN. Tissue Engineering of Temporomandibular Joint Cartilage. ACTA ACUST UNITED AC 2009. [DOI: 10.2200/s00198ed1v01y200906tis002] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
495
|
Kim G, Ahn S, Yoon H, Kim Y, Chun W. A cryogenic direct-plotting system for fabrication of 3D collagen scaffolds for tissue engineering. ACTA ACUST UNITED AC 2009. [DOI: 10.1039/b914187a] [Citation(s) in RCA: 83] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|