401
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Raof NA, Schiele NR, Xie Y, Chrisey DB, Corr DT. The maintenance of pluripotency following laser direct-write of mouse embryonic stem cells. Biomaterials 2010; 32:1802-8. [PMID: 21168910 DOI: 10.1016/j.biomaterials.2010.11.015] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2010] [Accepted: 11/08/2010] [Indexed: 01/30/2023]
Abstract
The ability to precisely pattern embryonic stem (ES) cells in vitro into predefined arrays/geometries may allow for the recreation of a stem cell niche for better understanding of how cellular microenvironmental factors govern stem cell maintenance and differentiation. In this study, a new gelatin-based laser direct-write (LDW) technique was utilized to deposit mouse ES cells into defined arrays of spots, while maintaining stem cell pluripotency. Results obtained from these studies showed that ES cells were successfully printed into specific patterns and remained viable. Furthermore, ES cells retained the expression of Oct4 in nuclei after LDW, indicating that the laser energy did not affect their maintenance of an undifferentiated state. The differentiation potential of mouse ES cells after LDW was confirmed by their ability to form embryoid bodies (EBs) and to spontaneously become cell lineages representing all three germ layers, revealed by the expression of marker proteins of nestin (ectoderm), Myf-5 (mesoderm) and PDX-1 (endoderm), after 7 days of cultivation. Gelatin-based LDW provides a new avenue for stem cell patterning, with precision and control of the cellular microenvironment.
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Affiliation(s)
- Nurazhani Abdul Raof
- The College of Nanoscale Science and Engineering, University at Albany, SUNY, 257 Fuller Road, Albany, NY 12203, USA
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402
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The improvement of fibroblast growth on hydrophobic biopolyesters by coating with polyhydroxyalkanoate granule binding protein PhaP fused with cell adhesion motif RGD. Biomaterials 2010; 31:8921-30. [DOI: 10.1016/j.biomaterials.2010.08.001] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2010] [Accepted: 08/01/2010] [Indexed: 12/18/2022]
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403
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Dorozhkin SV. Calcium orthophosphates as bioceramics: state of the art. J Funct Biomater 2010; 1:22-107. [PMID: 24955932 PMCID: PMC4030894 DOI: 10.3390/jfb1010022] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2010] [Revised: 11/16/2010] [Accepted: 11/25/2010] [Indexed: 12/18/2022] Open
Abstract
In the late 1960s, much interest was raised in regard to biomedical applications of various ceramic materials. A little bit later, such materials were named bioceramics. This review is limited to bioceramics prepared from calcium orthophosphates only, which belong to the categories of bioactive and bioresorbable compounds. There have been a number of important advances in this field during the past 30-40 years. Namely, by structural and compositional control, it became possible to choose whether calcium orthophosphate bioceramics were biologically stable once incorporated within the skeletal structure or whether they were resorbed over time. At the turn of the millennium, a new concept of calcium orthophosphate bioceramics-which is able to promote regeneration of bones-was developed. Presently, calcium orthophosphate bioceramics are available in the form of particulates, blocks, cements, coatings, customized designs for specific applications and as injectable composites in a polymer carrier. Current biomedical applications include artificial replacements for hips, knees, teeth, tendons and ligaments, as well as repair for periodontal disease, maxillofacial reconstruction, augmentation and stabilization of the jawbone, spinal fusion and bone fillers after tumor surgery. Exploratory studies demonstrate potential applications of calcium orthophosphate bioceramics as scaffolds, drug delivery systems, as well as carriers of growth factors, bioactive peptides and/or various types of cells for tissue engineering purposes.
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404
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Bandiera A, Urbani R, Sist P. Spontaneous patterning obtained by evaporation of Human Elastin-like Polypeptide solutions. ANNUAL INTERNATIONAL CONFERENCE OF THE IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. IEEE ENGINEERING IN MEDICINE AND BIOLOGY SOCIETY. ANNUAL INTERNATIONAL CONFERENCE 2010; 2010:819-22. [PMID: 21096309 DOI: 10.1109/iembs.2010.5626761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The potential of producing patterned, bioactive coatings with Human Elastin-Like Polypeptides (HELPs) has been investigated. The physicochemical features of these compounds have evidenced some differences between the two recombinantly expressed products. By a device-free, simple route and avoiding the use of chemically unfriendly compounds, micropatterned surfaces with the ability to control cell behavior could be obtained. Thus, HELPs represent a very promising class of macromolecule for future applications in surface engineering.
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405
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Zhang Z, Lai Y, Yu L, Ding J. Effects of immobilizing sites of RGD peptides in amphiphilic block copolymers on efficacy of cell adhesion. Biomaterials 2010; 31:7873-82. [DOI: 10.1016/j.biomaterials.2010.07.014] [Citation(s) in RCA: 136] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2010] [Accepted: 07/04/2010] [Indexed: 02/01/2023]
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406
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Qu Z, Yan J, Li B, Zhuang J, Huang Y. Improving bone marrow stromal cell attachment on chitosan/hydroxyapatite scaffolds by an immobilized RGD peptide. Biomed Mater 2010; 5:065001. [PMID: 20924135 DOI: 10.1088/1748-6041/5/6/065001] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Ample cell adhesion to scaffolds is essential for effective bone tissue engineering. Chitosan/hydroxyapatite (CS/HA) scaffolds with channel-shaped and spherically shaped pore morphologies were prepared via in situ compositing hybridization in combination with lyophilization. The sizes of channel-shaped and spherically shaped pores of the CS/HA scaffolds were 150-650 µm and 3-15 µm, respectively. The RGD peptide (Arg-Gly-Asp) was bound to the surface of CS/HA scaffolds via physical adsorption. More than 63% of RGD present in a PBS solution spontaneously adsorbed onto CS/HA scaffolds. High numbers of viable bone marrow stromal cells (BMSCs) were observed by confocal and fluorescence microscopy for cells cultured on CS/HA scaffolds with and without RGD for 3 days. BMSCs on CS/HA scaffolds with RGD (RGD-CS/HA) were incubated for 4 h under standard culture conditions, and the degree of cell adhesion was calculated. Cell adhesion to RGD-CS/HA scaffolds with different RGD concentrations was 71.6% and 80.7%, respectively. This was 30.9% and 47.5% higher than adhesion to the CS/HA scaffold without RGD, respectively. BMSCs cultured on the scaffolds for 14 days with osteogenic supplements expressed 103% higher alkaline phosphatase on the RGD-CS/HA scaffold (0.001 97 ± 0.000 31 U/L/ng), than on the unmodified scaffold (0.000 97 ± 0.000 25 U/L/ng) (p < 0.01), indicating that a RGD peptide significantly promotes osteogenic differentiation of BMSCs on CS/HA scaffolds. The results of this study indicate that RGD-CS/HA scaffolds promote initial cell adhesion, spread and differentiation toward an osteogenic phenotype.
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Affiliation(s)
- Zhiwei Qu
- Fourth Department of Orthopedics, First Hospital Affiliated to Harbin Medical University, Harbin 150081, People's Republic of China.
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407
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The use of poly(3-hydroxybutyrate-co-3-hydroxyhexanoate) scaffolds for tarsal repair in eyelid reconstruction in the rat. Biomaterials 2010; 31:7512-8. [DOI: 10.1016/j.biomaterials.2010.06.044] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2010] [Accepted: 06/28/2010] [Indexed: 11/18/2022]
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408
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Campoccia D, Montanaro L, Speziale P, Arciola CR. Antibiotic-loaded biomaterials and the risks for the spread of antibiotic resistance following their prophylactic and therapeutic clinical use. Biomaterials 2010; 31:6363-77. [DOI: 10.1016/j.biomaterials.2010.05.005] [Citation(s) in RCA: 300] [Impact Index Per Article: 21.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2010] [Accepted: 05/07/2010] [Indexed: 12/28/2022]
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409
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Stayshich RM, Meyer TY. New insights into poly(lactic-co-glycolic acid) microstructure: using repeating sequence copolymers to decipher complex NMR and thermal behavior. J Am Chem Soc 2010; 132:10920-34. [PMID: 20681726 PMCID: PMC3432321 DOI: 10.1021/ja102670n] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Sequence, which Nature uses to spectacular advantage, has not been fully exploited in synthetic copolymers. To investigate the effect of sequence and stereosequence on the physical properties of copolymers, a family of complex isotactic, syndiotactic, and atactic repeating sequence poly(lactic-co-glycolic acid) copolymers (RSC PLGAs) were prepared and their NMR and thermal behavior was studied. The unique suitability of polymers prepared from the bioassimilable lactic and glycolic acid monomers for biomedical applications makes them ideal candidates for this type of sequence engineering. Polymers with repeating units of LG, GLG and LLG (L = lactic, G = glycolic) with controlled and varied tacticities were synthesized by assembly of sequence-specific, stereopure dimeric, trimeric, and hexameric segmer units. Specifically labeled deuterated lactic and glycolic acid segmers were likewise prepared and polymerized. Molecular weights for the copolymers were in the range M(n) = 12-40 kDa by size exclusion chromatography in THF. Although the effects of sequence-influenced solution conformation were visible in all resonances of the (1)H and (13)C NMR spectra, the diastereotopic methylene resonances in the (1)H NMR (CDCl(3)) for the glycolic units of the copolymers proved most sensitive. An octad level of resolution, which corresponds to an astounding 31-atom distance between the most separated stereocenters, was observed in some mixed sequence polymers. Importantly, the level of sensitivity of a particular NMR resonance to small differences in sequence was found to depend on the sequence itself. Thermal properties were also correlated with sequence.
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Affiliation(s)
- Ryan M. Stayshich
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260
| | - Tara Y. Meyer
- Department of Chemistry, University of Pittsburgh, Pittsburgh, PA 15260
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410
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Zuleta FA, Velasquez P, De Aza PN. Effect of various sterilization methods on the bioactivity of laser ablation pseudowollastonite coating. J Biomed Mater Res B Appl Biomater 2010; 94:399-405. [DOI: 10.1002/jbm.b.31667] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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411
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Tong WY, Liang YM, Tam V, Yip HK, Kao YT, Cheung KMC, Yeung KWK, Lam YW. Biochemical characterization of the cell-biomaterial interface by quantitative proteomics. Mol Cell Proteomics 2010; 9:2089-98. [PMID: 20562470 DOI: 10.1074/mcp.m110.001966] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Surface topography and texture of cell culture substrata can affect the differentiation and growth of adherent cells. The biochemical basis of the transduction of the physical and mechanical signals to cellular responses is not well understood. The lack of a systematic characterization of cell-biomaterial interaction is the major bottleneck. This study demonstrated the use of a novel subcellular fractionation method combined with quantitative MS-based proteomics to enable the robust and high-throughput analysis of proteins at the adherence interface of Madin-Darby canine kidney cells. This method revealed the enrichment of extracellular matrix proteins and membrane and stress fibers proteins at the adherence surface, whereas it shows depletion of extracellular matrix belonging to the cytoplasmic, nucleus, and lateral and apical membranes. The asymmetric distribution of proteins between apical and adherence sides was also profiled. Apart from classical proteins with clear involvement in cell-material interactions, proteins previously not known to be involved in cell attachment were also discovered.
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Affiliation(s)
- W Y Tong
- Department of Orthopaedics and Traumatology, LKS Faculty of Medicine, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong
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412
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Cortivo R, Vindigni V, Iacobellis L, Abatangelo G, Pinton P, Zavan B. Nanoscale particle therapies for wounds and ulcers. Nanomedicine (Lond) 2010; 5:641-56. [DOI: 10.2217/nnm.10.32] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023] Open
Abstract
‘Small is beautiful’ – this should be the slogan of nanoscientists. Indeed, working with particles less than 100 nm in size, nanotechnology is on the verge of providing a host of new materials and approaches, revolutionizing applied medicine. The obvious potential of nanotechnology has attracted considerable investment from governments and industry hoping to drive its economic development. Several areas of medical care already benefit from the advantages that nanotechnology provides and its application in wound healing will be reviewed in this article.
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Affiliation(s)
- Roberta Cortivo
- Department of Histology, Microbiology & Biomedical Technologies, University of Padova, Viale G. Colombo 3, 35131 Padova, Italy
| | - Vincenzo Vindigni
- Plastic & Reconstructive Surgery Unit, University of Padova, Via Giustiniani 2, 35100 Padova, Italy
| | - Laura Iacobellis
- Department of Histology, Microbiology & Biomedical Technologies, University of Padova, Viale G. Colombo 3, 35131 Padova, Italy
| | - Giovanni Abatangelo
- Department of Histology, Microbiology & Biomedical Technologies, University of Padova, Viale G. Colombo 3, 35131 Padova, Italy
| | - Paolo Pinton
- Department of Experimental & Diagnostic Medicine, General Pathology Section, Interdisciplinary Center for the Study of Inflammation (ICSI) & Emilia Romagna Laboratory BioPharmaNet, University of Ferrara, Via Borsari 46, 44100 Ferrara, Italy
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413
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Thresholds for indirect DNA damage across cellular barriers for orthopaedic biomaterials. Biomaterials 2010; 31:4477-83. [DOI: 10.1016/j.biomaterials.2010.02.038] [Citation(s) in RCA: 49] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2010] [Accepted: 02/12/2010] [Indexed: 12/12/2022]
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414
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Design and synthesis of a potent peptide containing both specific and non-specific cell-adhesion motifs. Biomaterials 2010; 31:4809-17. [DOI: 10.1016/j.biomaterials.2010.02.064] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2010] [Accepted: 02/23/2010] [Indexed: 02/06/2023]
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415
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Saxena AK. Tissue engineering and regenerative medicine research perspectives for pediatric surgery. Pediatr Surg Int 2010; 26:557-73. [PMID: 20333389 DOI: 10.1007/s00383-010-2591-8] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 03/02/2010] [Indexed: 01/28/2023]
Abstract
Tissue engineering and regenerative medicine research is being aggressively pursued in attempts to develop biological substitutes to replace lost tissue or organs. Remarkable degrees of success have been achieved in the generation of a variety of tissues and organs as a result of concerted contributions by multidisciplinary groups in the field of biotechnology. Engineering of an organ is a complex process which is initiated by appropriate sourcing of cells and their controlled proliferation to achieve critical numbers for seeding on biodegradable scaffolds in order to create cell-scaffold constructs, which are thereafter maintained in bioreactors to generate tissues identical to those required for replacement. Extensive efforts in understanding the characteristics of cells and their interaction with specifically tailored scaffolds holds the key to their attachment, controlled proliferation and differentiation, intercommunication, and organization to form tissues. The demand for tissue-engineered organs is enormous and this technology holds the promise to supply customized organs to overcome the severe shortages that are currently faced by the pediatric patient, especially due to organ-size mismatch. The contemporary state of tissue-engineering technology presented in this review summarizes the advances in the various areas of regenerative medicine and addresses issues that are associated with its future implementation in the pediatric surgical patient.
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Affiliation(s)
- Amulya K Saxena
- Experimental Fetal Surgery and Tissue Engineering Unit, Department of Pediatric and Adolescent Surgery, Medical University of Graz, Auenbruggerplatz-34, 8036, Graz, Austria.
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416
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Stieglitz T. Integration of Microfluidic Capabilities into Micromachined Neural Implants. ACTA ACUST UNITED AC 2010. [DOI: 10.1260/1759-3093.1.2.139] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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417
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Garty S, Kimelman-Bleich N, Hayouka Z, Cohn D, Friedler A, Pelled G, Gazit D. Peptide-Modified “Smart” Hydrogels and Genetically Engineered Stem Cells for Skeletal Tissue Engineering. Biomacromolecules 2010; 11:1516-26. [DOI: 10.1021/bm100157s] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Affiliation(s)
- Shai Garty
- Casali Institute of Applied Chemistry, Institute of Chemistry, Edmond J. Safra, The Hebrew University of Jerusalem, Givaat Ram Campus, Jerusalem, Israel, 91904, Skeletal Biotech Lab, Faculty of Dental Medicine, Hadassah Medical Campus, Ein Kerem, The Hebrew University of Jerusalem, Jerusalem, Israel, 91120, Department of Organic Chemistry, Institute of Chemistry, Edmond J. Safra, The Hebrew University of Jerusalem, Givaat Ram Campus, Jerusalem, Israel, 91904, and Department of Surgery and Cedars-Sinai
| | - Nadav Kimelman-Bleich
- Casali Institute of Applied Chemistry, Institute of Chemistry, Edmond J. Safra, The Hebrew University of Jerusalem, Givaat Ram Campus, Jerusalem, Israel, 91904, Skeletal Biotech Lab, Faculty of Dental Medicine, Hadassah Medical Campus, Ein Kerem, The Hebrew University of Jerusalem, Jerusalem, Israel, 91120, Department of Organic Chemistry, Institute of Chemistry, Edmond J. Safra, The Hebrew University of Jerusalem, Givaat Ram Campus, Jerusalem, Israel, 91904, and Department of Surgery and Cedars-Sinai
| | - Zvi Hayouka
- Casali Institute of Applied Chemistry, Institute of Chemistry, Edmond J. Safra, The Hebrew University of Jerusalem, Givaat Ram Campus, Jerusalem, Israel, 91904, Skeletal Biotech Lab, Faculty of Dental Medicine, Hadassah Medical Campus, Ein Kerem, The Hebrew University of Jerusalem, Jerusalem, Israel, 91120, Department of Organic Chemistry, Institute of Chemistry, Edmond J. Safra, The Hebrew University of Jerusalem, Givaat Ram Campus, Jerusalem, Israel, 91904, and Department of Surgery and Cedars-Sinai
| | - Daniel Cohn
- Casali Institute of Applied Chemistry, Institute of Chemistry, Edmond J. Safra, The Hebrew University of Jerusalem, Givaat Ram Campus, Jerusalem, Israel, 91904, Skeletal Biotech Lab, Faculty of Dental Medicine, Hadassah Medical Campus, Ein Kerem, The Hebrew University of Jerusalem, Jerusalem, Israel, 91120, Department of Organic Chemistry, Institute of Chemistry, Edmond J. Safra, The Hebrew University of Jerusalem, Givaat Ram Campus, Jerusalem, Israel, 91904, and Department of Surgery and Cedars-Sinai
| | - Assaf Friedler
- Casali Institute of Applied Chemistry, Institute of Chemistry, Edmond J. Safra, The Hebrew University of Jerusalem, Givaat Ram Campus, Jerusalem, Israel, 91904, Skeletal Biotech Lab, Faculty of Dental Medicine, Hadassah Medical Campus, Ein Kerem, The Hebrew University of Jerusalem, Jerusalem, Israel, 91120, Department of Organic Chemistry, Institute of Chemistry, Edmond J. Safra, The Hebrew University of Jerusalem, Givaat Ram Campus, Jerusalem, Israel, 91904, and Department of Surgery and Cedars-Sinai
| | - Gadi Pelled
- Casali Institute of Applied Chemistry, Institute of Chemistry, Edmond J. Safra, The Hebrew University of Jerusalem, Givaat Ram Campus, Jerusalem, Israel, 91904, Skeletal Biotech Lab, Faculty of Dental Medicine, Hadassah Medical Campus, Ein Kerem, The Hebrew University of Jerusalem, Jerusalem, Israel, 91120, Department of Organic Chemistry, Institute of Chemistry, Edmond J. Safra, The Hebrew University of Jerusalem, Givaat Ram Campus, Jerusalem, Israel, 91904, and Department of Surgery and Cedars-Sinai
| | - Dan Gazit
- Casali Institute of Applied Chemistry, Institute of Chemistry, Edmond J. Safra, The Hebrew University of Jerusalem, Givaat Ram Campus, Jerusalem, Israel, 91904, Skeletal Biotech Lab, Faculty of Dental Medicine, Hadassah Medical Campus, Ein Kerem, The Hebrew University of Jerusalem, Jerusalem, Israel, 91120, Department of Organic Chemistry, Institute of Chemistry, Edmond J. Safra, The Hebrew University of Jerusalem, Givaat Ram Campus, Jerusalem, Israel, 91904, and Department of Surgery and Cedars-Sinai
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418
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Decontamination of chemical and biological warfare agents with a single multi-functional material. Biomaterials 2010; 31:4417-25. [DOI: 10.1016/j.biomaterials.2010.02.004] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Accepted: 02/02/2010] [Indexed: 11/24/2022]
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419
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Development of Biomedical Polymer-Silicate Nanocomposites: A Materials Science Perspective. MATERIALS 2010. [PMCID: PMC5445915 DOI: 10.3390/ma3052986] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Biomedical polymer-silicate nanocomposites have potential to become critically important to the development of biomedical applications, ranging from diagnostic and therapeutic devices, tissue regeneration and drug delivery matrixes to various bio-technologies that are inspired by biology but have only indirect biomedical relation. The fundamental understanding of polymer-nanoparticle interactions is absolutely necessary to control structure-property relationships of materials that need to work within the chemical, physical and biological constraints required by an application. This review summarizes the most recent published strategies to design and develop polymer-silicate nanocomposites (including clay based silicate nanoparticles and bioactive glass nanoparticles) for a variety of biomedical applications. Emerging trends in bio-technological and biomedical nanocomposites are highlighted and potential new fields of applications are examined.
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420
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Kwon OS, Park SJ, Jang J. A high-performance VEGF aptamer functionalized polypyrrole nanotube biosensor. Biomaterials 2010; 31:4740-7. [PMID: 20227108 DOI: 10.1016/j.biomaterials.2010.02.040] [Citation(s) in RCA: 118] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2010] [Accepted: 02/12/2010] [Indexed: 01/26/2023]
Abstract
In this study, we examined the in vitro electrochemical detection of Vascular Endothelial Growth Factor (VEGF) as cancer biomarker using p-type field-effect transistor (FET) biosensor. We demonstrated the high-performance FET sensor, which could detect ca. 400 fM of VEGF concentration, based on anti-VEGF RNA aptamer conjugated carboxylated polypyrrole nanotubes (CPNTs). The CPNTs used as high-performance transducers of this FET system were successfully fabricated by cylindrical micelle templates in a water-in-oil emulsion system. The functional carboxyl group (-COOH) was effectively incorporated into the polymer backbone during the polymerization by using pyrrole-3-carboxylic acid (P3CA) as a co-monomer. Two types of CPNTs (CPNT1: ca. 200 nm in diameter, CPNT2: ca. 120 nm in diameter) demonstrated the excellent conductivity performance in this FET system. Based on CPNTs conjugated with anti-VEGF RNA aptamer (CPNTs-aptamer), VEGF (target molecule) acts as the gate dielectrics of p-type FET sensor and specifically interacts with anti-VEGF aptamer attached to CPNT surfaces. Importantly, the VEGF detection limit of the FET sensor based on CPNT2-aptamer was found to be near 400 fM in real-time. Moreover, the CPNTs-aptamer FET sensors can be repeatedly used for various concentrations of the target molecule (VEGFs) through the washing and rinsing processes.
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Affiliation(s)
- Oh Seok Kwon
- School of Chemical and Biological Engineering, Seoul National University, Sillim-dong, Gwanak-gu, Seoul 151-742, Republic of Korea
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421
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422
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Klausner EA, Zhang Z, Chapman RL, Multack RF, Volin MV. Ultrapure chitosan oligomers as carriers for corneal gene transfer. Biomaterials 2010; 31:1814-20. [DOI: 10.1016/j.biomaterials.2009.10.031] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2009] [Accepted: 10/12/2009] [Indexed: 12/27/2022]
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423
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Dorozhkin SV. Nanosized and nanocrystalline calcium orthophosphates. Acta Biomater 2010; 6:715-34. [PMID: 19861183 DOI: 10.1016/j.actbio.2009.10.031] [Citation(s) in RCA: 245] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2009] [Revised: 10/13/2009] [Accepted: 10/20/2009] [Indexed: 02/05/2023]
Abstract
Recent developments in biomineralization have already demonstrated that nanosized crystals and particles play an important role in the formation of hard tissues of animals. Namely, it is well established that the basic inorganic building blocks of bones and teeth of mammals are nanosized and nanocrystalline calcium orthophosphates in the form of apatites. In mammals, tens to hundreds nanocrystals of a biological apatite have been found to be combined into self-assembled structures under the control of bioorganic matrixes. Therefore, application and prospective use of the nanosized and nanocrystalline calcium orthophosphates for a clinical repair of damaged bones and teeth are also well known. For example, greater viability and better proliferation of various types of cells have been detected on smaller crystals of calcium orthophosphates. Thus, the nanosized and nanocrystalline forms of calcium orthophosphates have great potential to revolutionize the hard tissue-engineering field, starting from bone repair and augmentation to controlled drug delivery systems. This paper reviews the current state of art and recent developments of various nanosized and nanocrystalline calcium orthophosphates, starting from synthesis and characterization to biomedical and clinical applications. The review also provides possible directions for future research and development.
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424
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The behaviour of neural stem cells on polyhydroxyalkanoate nanofiber scaffolds. Biomaterials 2010; 31:3967-75. [PMID: 20153524 DOI: 10.1016/j.biomaterials.2010.01.132] [Citation(s) in RCA: 132] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2010] [Accepted: 01/22/2010] [Indexed: 12/25/2022]
Abstract
Polyhydroxyalkanoates (PHA) have demonstrated their potentials as medical implant biomaterials. Neural stem cells (NSCs) grown on/in PHA scaffolds may be useful for repairing central nervous system (CNS) injury. To investigate this possibility, nanofiber matrices (scaffolds) prepared from several PHA via a novel phase separation process were studied to mimic natural extracellular matrix (ECM), and rat-derived NSCs grown in the PHA matrices were characterized regarding their in vitro differentiation behaviors. All three PHA materials including poly(3-hydroxybutyrate) (PHB), copolymer of 3-hydroxybutyrate and 4-hydroxybutyrate (P3HB4HB), and copolymer of 3-hydroxybutyrate and 3-hydroxyhexanoate (PHBHHx) supported NSC growth and differentiation both on their 2D films and 3D matrices. Among three PHA nanofiber matrices, PHBHHx one showed the strongest potentials to promote NSC differentiation into neurons which is beneficial for CNS repair. Compared to the 2D films, 3D nanofiber matrices appeared to be more suitable for NSC attachment, synaptic outgrowth and synaptogenesis. It was suggested that PHBHHx nanofiber scaffolds (matrices) that promote NSC growth and differentiation, can be developed for treating central nervous system injury.
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425
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Bongio M, van den Beucken JJJP, Leeuwenburgh SCG, Jansen JA. Development of bone substitute materials: from ‘biocompatible’ to ‘instructive’. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00795a] [Citation(s) in RCA: 96] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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426
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Mukherjee S, Venugopal JR, Ravichandran R, Ramakrishna S, Raghunath M. Multimodal biomaterial strategies for regeneration of infarcted myocardium. ACTA ACUST UNITED AC 2010. [DOI: 10.1039/c0jm00805b] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
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Biomaterials and Biological Materials, Common Definitions, History, and Classification. BIOLOGICAL MATERIALS OF MARINE ORIGIN 2010. [DOI: 10.1007/978-90-481-9130-7_1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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429
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Tang J, Peng R, Ding J. The regulation of stem cell differentiation by cell-cell contact on micropatterned material surfaces. Biomaterials 2009; 31:2470-6. [PMID: 20022630 DOI: 10.1016/j.biomaterials.2009.12.006] [Citation(s) in RCA: 247] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2009] [Accepted: 12/01/2009] [Indexed: 10/20/2022]
Abstract
Using the material technique recently developed by us, we prepared a micropattern on poly(ethylene glycol) (PEG) hydrogel to keep background resistant to cell adhesion for a long time, which made examination of differentiation of localized stem cells available. Our micropattern designed in this paper prevented or ensured contact between cells adhering in arginine-glycine-aspartic acid (RGD) microdomains, and thus afforded a unique way to study the effects of cell-cell contact on the lineage differentiation of stem cells while ruling out the interference of soluble factors or cell seeding concentration etc. As demonstration, mesenchymal stem cells derived from rats were examined in this study, and both osteogenic and adipogenic differentiations were found to be regulated by cell-cell contact. Isolated cells exhibited less significant differentiation than paired or aggregated cells. For those stem cells in contact, the extent of differentiation was fairly linearly related to the extent of contact characterized by coordination number. Additionally, we revealed the existence of some unknown cues besides gap junction responsible for such effects of cell-cell contact.
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Affiliation(s)
- Jian Tang
- Key Laboratory of Molecular Engineering of Polymers of Ministry of Education, Department of Macromolecular Science, Advanced Materials Laboratory, Fudan University, Shanghai 200433, China
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Nanodimensional and Nanocrystalline Apatites and Other Calcium Orthophosphates in Biomedical Engineering, Biology and Medicine. MATERIALS 2009. [PMCID: PMC5513572 DOI: 10.3390/ma2041975] [Citation(s) in RCA: 116] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
Recent developments in biomineralization have already demonstrated that nanosized particles play an important role in the formation of hard tissues of animals. Namely, the basic inorganic building blocks of bones and teeth of mammals are nanodimensional and nanocrystalline calcium orthophosphates (in the form of apatites) of a biological origin. In mammals, tens to hundreds nanocrystals of a biological apatite were found to be combined into self-assembled structures under the control of various bioorganic matrixes. In addition, the structures of both dental enamel and bones could be mimicked by an oriented aggregation of nanosized calcium orthophosphates, determined by the biomolecules. The application and prospective use of nanodimensional and nanocrystalline calcium orthophosphates for a clinical repair of damaged bones and teeth are also known. For example, a greater viability and a better proliferation of various types of cells were detected on smaller crystals of calcium orthophosphates. Thus, the nanodimensional and nanocrystalline forms of calcium orthophosphates have a great potential to revolutionize the field of hard tissue engineering starting from bone repair and augmentation to the controlled drug delivery devices. This paper reviews current state of knowledge and recent developments of this subject starting from the synthesis and characterization to biomedical and clinical applications. More to the point, this review provides possible directions of future research and development.
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