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Mutch AL, Yang J, Ferro V, A A, Grøndahl L. Sulfated Alginate for Biomedical Applications. Macromol Biosci 2024:e2400237. [PMID: 39078625 DOI: 10.1002/mabi.202400237] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Revised: 07/11/2024] [Indexed: 07/31/2024]
Abstract
Alginate (Alg) polymers have received much attention due to the mild conditions required for gel formation and their good bio-acceptability. However, due to limited interactions with cells, many drugs, and biomolecules, chemically modified alginates are of great interest. Sulfated alginate (S-Alg) is a promising heparin-mimetic that continues to be investigated both as a drug molecule and as a component of biomaterials. Herein, the S-Alg literature of the past five years (2017-2023) is reviewed. Several methods used to synthesize S-Alg are described, with a focus on new advances in characterization and stereoselectivity. Material fabrication is another focus and spans bulk materials, particles, scaffolds, coatings, and part of multicomponent biomaterials. The new application of S-Alg as an antitumor agent is highlighted together with studies evaluating safety and biodistribution. The high binding affinity of S-Alg for various drugs and heparin-binding proteins is exploited extensively in biomaterial design to tune the encapsulation and release of these agents and this aspect is covered in detail. Recommondations include publishing key material properties to allow reproducibility, careful selection of appropriate sulfation strategies, the use of cross-linking strategies other than ionic cross-linking for material fabrication, and more detailed toxicity and biodistribution studies to inform future work.
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Affiliation(s)
- Alexandra L Mutch
- School of Chemistry and Molecular Biosciences, The University of Queensland, Australia
| | - Jiankun Yang
- School of Chemistry and Molecular Biosciences, The University of Queensland, Australia
| | - Vito Ferro
- School of Chemistry and Molecular Biosciences, The University of Queensland, Australia
| | - Anitha A
- School of Chemistry and Molecular Biosciences, The University of Queensland, Australia
| | - Lisbeth Grøndahl
- School of Chemistry and Molecular Biosciences, The University of Queensland, Australia
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2
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Aminoroaya A, Khorasani SN, Bagheri R, Talebi Z, Malekkhouyan R, Das O, Neisiany RE. Facile encapsulation of cyanoacrylate-based bioadhesive by electrospray method and investigation of the process parameters. Sci Rep 2024; 14:5389. [PMID: 38443417 PMCID: PMC10914717 DOI: 10.1038/s41598-024-56008-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Accepted: 02/29/2024] [Indexed: 03/07/2024] Open
Abstract
Polymer microcapsules containing cyanoacrylates have represented a promising option to develop self-healing biomaterials. This study aims to develop an electrospray method for the preparation of capsules using poly(methyl methacrylate) (PMMA) as the encapsulant and ethyl 2-cyanoacrylate (EC) as the encapsulate. It also aims to study the effect of the electrospray process parameters on the size and morphology of the capsules. The capsules were characterized using Fourier-transform infrared (FTIR) spectroscopy, thermogravimetric analysis (TGA), and field-emission scanning electron microscopy (FE-SEM). Moreover, the effects of electrospray process parameters on the size were investigated by Taguchi experimental design. FTIR and TGA approved the presence of both PMMA and EC without further reaction. FE-SEM micrograph demonstrated that an appropriate choice of solvents, utilizing an appropriate PMMA:EC ratio and sufficient PMMA concentration are critical factors to produce capsules dominantly with an intact and spherical morphology. Utilizing various flow rates (0.3-0.5 ml/h) and applied voltage (18-26 kV), capsules were obtained with a 600-1000 nm size range. At constantly applied voltages, the increase in flow rate increased the capsule size up to 40% (ANOVA, p ≤ 0.05), while at constant flow rates, the increase in applied voltage reduced the average capsule size by 3.4-26% (ANOVA, p ≤ 0.05). The results from the Taguchi design represented the significance of solution flow rate, applied voltage, and solution concentration. It was shown that the most effective parameter on the size of capsules is flow rate. This research demonstrated that electrospray can be utilized as a convenient method for the preparation of sub-micron PMMA capsules containing EC. Furthermore, the morphology of the capsules is dominated by solvents, PMMA concentration, and PMMA:EC ratio, while the average size of the capsules can be altered by adjusting the flow rate and applied voltage of the electrospray process.
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Affiliation(s)
- Alireza Aminoroaya
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
- Department of Chemical Engineering and Materials Science, Michigan State University, 428 S. Shaw Lane, East Lansing, MI, 48824, USA
| | - Saied Nouri Khorasani
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
| | - Rouholah Bagheri
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
| | - Zahra Talebi
- Department of Textile Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Roya Malekkhouyan
- Department of Chemical Engineering, Isfahan University of Technology, Isfahan, 84156-83111, Iran
| | - Oisik Das
- Department of Civil, Environmental and Natural Resources Engineering, Luleå University of Technology, 97187, Lulea, Sweden.
| | - Rasoul Esmaeely Neisiany
- Biotechnology Centre, Silesian University of Technology, Krzywoustego 8, 44-100, Gliwice, Poland.
- Department of Polymer Engineering, Hakim Sabzevari University, Sabzevar, 9617976487, Iran.
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Mohammadpour M, Samadian H, Moradi N, Izadi Z, Eftekhari M, Hamidi M, Shavandi A, Quéro A, Petit E, Delattre C, Elboutachfaiti R. Fabrication and Characterization of Nanocomposite Hydrogel Based on Alginate/Nano-Hydroxyapatite Loaded with Linum usitatissimum Extract as a Bone Tissue Engineering Scaffold. Mar Drugs 2021; 20:md20010020. [PMID: 35049874 PMCID: PMC8781792 DOI: 10.3390/md20010020] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2021] [Revised: 12/09/2021] [Accepted: 12/14/2021] [Indexed: 12/17/2022] Open
Abstract
In the current paper, we fabricated, characterized, and applied nanocomposite hydrogel based on alginate (Alg) and nano-hydroxyapatite (nHA) loaded with phenolic purified extracts from the aerial part of Linum usitatissimum (LOH) as the bone tissue engineering scaffold. nHA was synthesized based on the wet chemical technique/precipitation reaction and incorporated into Alg hydrogel as the filler via physical cross-linking. The characterizations (SEM, DLS, and Zeta potential) revealed that the synthesized nHA possess a plate-like shape with nanometric dimensions. The fabricated nanocomposite has a porous architecture with interconnected pores. The average pore size was in the range of 100–200 µm and the porosity range of 80–90%. The LOH release measurement showed that about 90% of the loaded drug was released within 12 h followed by a sustained release over 48 h. The in vitro assessments showed that the nanocomposite possesses significant antioxidant activity promoting bone regeneration. The hemolysis induction measurement showed that the nanocomposites were hemocompatible with negligible hemolysis induction. The cell viability/proliferation confirmed the biocompatibility of the nanocomposites, which induced proliferative effects in a dose-dependent manner. This study revealed the fabricated nanocomposites are bioactive and osteoactive applicable for bone tissue engineering applications.
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Affiliation(s)
- Mahnaz Mohammadpour
- Department of Chemistry, Faculty of Sciences, Tarbiat Modares University, P.O. Box 14115-111, Tehran 6715847141, Iran;
| | - Hadi Samadian
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah 6734667149, Iran; (Z.I.); (M.E.)
- Correspondence: (H.S.); (C.D.)
| | - Nader Moradi
- Student’s Research Committee, School of Pharmacy, Kermanshah University of Medical Sciences, Kermanshah 6714415153, Iran;
| | - Zhila Izadi
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah 6734667149, Iran; (Z.I.); (M.E.)
| | - Mahdieh Eftekhari
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah 6734667149, Iran; (Z.I.); (M.E.)
| | - Masoud Hamidi
- BioMatter-Biomass Transformation Lab (BTL), École Polytechnique de Bruxelles, Université Libre de Bruxelles, Avenue F.D. Roosevelt, 50-CP 165/61, 1050 Brussels, Belgium; (M.H.); (A.S.)
| | - Amin Shavandi
- BioMatter-Biomass Transformation Lab (BTL), École Polytechnique de Bruxelles, Université Libre de Bruxelles, Avenue F.D. Roosevelt, 50-CP 165/61, 1050 Brussels, Belgium; (M.H.); (A.S.)
| | - Anthony Quéro
- UMRT INRAE 1158 BioEcoAgro, Laboratoire BIOPI, University Institute of Technology, University of Picardie Jules Verne, 80000 Amiens, France; (A.Q.); (E.P.); (R.E.)
| | - Emmanuel Petit
- UMRT INRAE 1158 BioEcoAgro, Laboratoire BIOPI, University Institute of Technology, University of Picardie Jules Verne, 80000 Amiens, France; (A.Q.); (E.P.); (R.E.)
| | - Cédric Delattre
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, Institut Pascal, 63000 Clermont-Ferrand, France
- Institut Universitaire de France (IUF), 1 Rue Descartes, 75005 Paris, France
- Correspondence: (H.S.); (C.D.)
| | - Redouan Elboutachfaiti
- UMRT INRAE 1158 BioEcoAgro, Laboratoire BIOPI, University Institute of Technology, University of Picardie Jules Verne, 80000 Amiens, France; (A.Q.); (E.P.); (R.E.)
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Jabli M, Almalki SG, Agougui H. An insight into methylene blue adsorption characteristics onto functionalized alginate bio-polymer gel beads with λ-carrageenan-calcium phosphate, carboxymethyl cellulose, and celite 545. Int J Biol Macromol 2020; 156:1091-1103. [DOI: 10.1016/j.ijbiomac.2019.11.140] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Revised: 10/30/2019] [Accepted: 11/18/2019] [Indexed: 10/25/2022]
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Kumar JN, Pang VYT, Aik SXL. Calcium triggered self-assembly of alginate-graft-POEGMA via RAFT for the encapsulation of lipophillic actives. J Mater Chem B 2017; 5:8254-8263. [DOI: 10.1039/c7tb01670k] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
Self-assembly of alginate into nanoparticles was realized by grafting hydrophilic brushes via RAFT.
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Affiliation(s)
- Jatin N. Kumar
- Institute of Materials Research & Engineering
- A*STAR (Agency for Science, Technology and Research)
- Singapore 138634
- Singapore
| | - Victoria Y. T. Pang
- Institute of Materials Research & Engineering
- A*STAR (Agency for Science, Technology and Research)
- Singapore 138634
- Singapore
| | - Shalen X. L. Aik
- Institute of Materials Research & Engineering
- A*STAR (Agency for Science, Technology and Research)
- Singapore 138634
- Singapore
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Corstens MN, Berton-Carabin CC, de Vries R, Troost FJ, Masclee AAM, Schroën K. Food-grade micro-encapsulation systems that may induce satiety via delayed lipolysis: A review. Crit Rev Food Sci Nutr 2015; 57:2218-2244. [DOI: 10.1080/10408398.2015.1057634] [Citation(s) in RCA: 45] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Meinou N. Corstens
- Department of Agrotechnology & Food Sciences, Food Process Engineering Group, Wageningen University and Research Center, Wageningen, The Netherlands
| | - Claire C. Berton-Carabin
- Department of Agrotechnology & Food Sciences, Food Process Engineering Group, Wageningen University and Research Center, Wageningen, The Netherlands
| | - Renko de Vries
- Department of Agrotechnology & Food Sciences, Physical Chemistry and Colloid Science Group, Wageningen University and Research Center, Wageningen, The Netherlands
| | - Freddy J. Troost
- Department of Internal Medicine, Division of Gastroenterology-Hepatology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Ad A. M. Masclee
- Department of Internal Medicine, Division of Gastroenterology-Hepatology, Maastricht University Medical Centre, Maastricht, The Netherlands
| | - Karin Schroën
- Department of Agrotechnology & Food Sciences, Food Process Engineering Group, Wageningen University and Research Center, Wageningen, The Netherlands
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Zhou J, Hyun DC, Liu H, Wu H, Xia Y. Protein Capsules with Cross-Linked, Semipermeable, and Enzyme-Degradable Surface Barriers for Controlled Release. Macromol Rapid Commun 2014; 35:1436-42. [DOI: 10.1002/marc.201400201] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Revised: 05/04/2014] [Indexed: 11/05/2022]
Affiliation(s)
- Jianhua Zhou
- Department of Chemistry; Hong Kong University of Science and Technology; Clear Water Bay Kowloon, Hong Kong PR China
| | - Dong Choon Hyun
- The Wallace H. Coulter Department of Biomedical Engineering; Georgia Institute of Technology and Emory University; Atlanta GA 30332 USA
| | - Hang Liu
- School of Chemistry and Biochemistry; Georgia Institute of Technology; Atlanta GA 30332 USA
| | - Hongkai Wu
- Department of Chemistry; Hong Kong University of Science and Technology; Clear Water Bay Kowloon, Hong Kong PR China
| | - Younan Xia
- School of Chemistry and Biochemistry; Georgia Institute of Technology; Atlanta GA 30332 USA
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9
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Shim J, Lim JM, Shea PJ, Oh BT. Simultaneous removal of phenol, Cu and Cd from water with corn cob silica-alginate beads. JOURNAL OF HAZARDOUS MATERIALS 2014; 272:129-36. [PMID: 24685529 DOI: 10.1016/j.jhazmat.2014.03.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2013] [Revised: 02/07/2014] [Accepted: 03/05/2014] [Indexed: 05/17/2023]
Abstract
Phenol and heavy metals in petroleum waste are environmental and human health concerns, but physicochemical removal is often cost-prohibitive and can produce toxic secondary products and treatment residues. An environmentally benign alternative combines corn cob silica with alginate and immobilized bacteria into beads for treating contaminated water. The concentration of phenol was decreased >92% by Pseudomonas putida YNS1 on aliginate-silica beads (2%, w/v) after equilibrating for 96h with water containing 214mg phenol/L. GC-MS analysis indicated formation of benzoquinone and other polar products. Beads containing corn cob silica decreased Cu concentrations by 84-88% and Cd by 83-87% within 24h. In a mixture of 114mg phenol, 43mg Cu and 51mg Cd/L, phenol removal (93% within 96h) only occurred with beads containing the silica and bacterial strain. Beads containing corn cob silica removed >97% of the Cu and >99% of the Cd, critical for reducing toxicity to the bacteria. Beads with the immobilized strain removed phenol when zeolite was used instead of corn cob silica, but beads with silica were more effective for Cu and Cd removal. Results show the potential of corn cob silica combined with alginate and immobilized bacteria for removing phenol and heavy metals from contaminated water.
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Affiliation(s)
- Jaehong Shim
- Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752, South Korea; School of Natural Resources, University of Nebraska-Lincoln, Lincoln, NE 68583-0817, USA
| | - Jeong-Muk Lim
- Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752, South Korea
| | - Patrick J Shea
- School of Natural Resources, University of Nebraska-Lincoln, Lincoln, NE 68583-0817, USA
| | - Byung-Taek Oh
- Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Chonbuk National University, Iksan, Jeonbuk 570-752, South Korea.
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Abbaspourrad A, Datta SS, Weitz DA. Controlling release from pH-responsive microcapsules. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2013; 29:12697-702. [PMID: 24041287 DOI: 10.1021/la403064f] [Citation(s) in RCA: 82] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
We report a microfluidic approach to produce monodisperse pH-responsive microcapsules with precisely controlled release behavior. The solid microcapsule shells are composed of a biocompatible pH-responsive polymer and robustly encapsulate an active material; however, when exposed to a trigger pH, the shells degrade and ultimately release the microcapsule contents. We control the trigger pH by using polymers that dissolve at different pH values. We independently control the time at which the microcapsule contents are released by carefully controlling the shell thickness. Moreover, we independently control the rate at which the encapsulated contents are released by making hybrid shells composed of a mixture of a pH-responsive polymer and varying proportions of another, solid, pH-unresponsive polymer. This enables us to achieve monodisperse microcapsules that robustly encapsulate an active material, only releasing it when exposed to a desired pH, after a prescribed time delay, and at a prescribed rate.
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Affiliation(s)
- Alireza Abbaspourrad
- Department of Physics and SEAS, Harvard University , Cambridge, Massachusetts 02138, United States
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Taneja K, Pareek A, Verma P, Jain V, Ratan Y, Ashawat MS. Nanocomposite: An emerging tool for bone tissue transplantation and drug delivery. INDIAN JOURNAL OF TRANSPLANTATION 2012. [DOI: 10.1016/j.ijt.2012.07.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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12
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Wen Y, Grøndahl L, Gallego MR, Jorgensen L, Møller EH, Nielsen HM. Delivery of Dermatan Sulfate from Polyelectrolyte Complex-Containing Alginate Composite Microspheres for Tissue Regeneration. Biomacromolecules 2012; 13:905-17. [DOI: 10.1021/bm201821x] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Yanhong Wen
- Department of Pharmacy, Faculty
of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100, Copenhagen, Denmark
| | - Lisbeth Grøndahl
- School of Chemistry and Molecular
Bioscience, University of Queensland, Australia
| | | | - Lene Jorgensen
- Department of Pharmacy, Faculty
of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100, Copenhagen, Denmark
| | - Eva H. Møller
- Department of Pharmacy, Faculty
of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100, Copenhagen, Denmark
| | - Hanne M. Nielsen
- Department of Pharmacy, Faculty
of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, DK-2100, Copenhagen, Denmark
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Bioengineering embryonic stem cell microenvironments for the study of breast cancer. Int J Mol Sci 2011; 12:7662-91. [PMID: 22174624 PMCID: PMC3233430 DOI: 10.3390/ijms12117662] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Revised: 10/27/2011] [Accepted: 10/31/2011] [Indexed: 12/12/2022] Open
Abstract
Breast cancer is the most prevalent disease amongst women worldwide and metastasis is the main cause of death due to breast cancer. Metastatic breast cancer cells and embryonic stem (ES) cells display similar characteristics. However, unlike metastatic breast cancer cells, ES cells are nonmalignant. Furthermore, embryonic microenvironments have the potential to convert metastatic breast cancer cells into a less invasive phenotype. The creation of in vitro embryonic microenvironments will enable better understanding of ES cell-breast cancer cell interactions, help elucidate tumorigenesis, and lead to the restriction of breast cancer metastasis. In this article, we will present the characteristics of breast cancer cells and ES cells as well as their microenvironments, importance of embryonic microenvironments in inhibiting tumorigenesis, convergence of tumorigenic and embryonic signaling pathways, and state of the art in bioengineering embryonic microenvironments for breast cancer research. Additionally, the potential application of bioengineered embryonic microenvironments for the prevention and treatment of invasive breast cancer will be discussed.
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14
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Wen Y, Gallego MR, Nielsen LF, Jorgensen L, Everland H, Møller EH, Nielsen HM. Biodegradable nanocomposite microparticles as drug delivering injectable cell scaffolds. J Control Release 2011; 156:11-20. [DOI: 10.1016/j.jconrel.2011.07.013] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2011] [Revised: 07/07/2011] [Accepted: 07/09/2011] [Indexed: 12/12/2022]
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Ulery BD, Nair LS, Laurencin CT. Biomedical Applications of Biodegradable Polymers. JOURNAL OF POLYMER SCIENCE. PART B, POLYMER PHYSICS 2011; 49:832-864. [PMID: 21769165 PMCID: PMC3136871 DOI: 10.1002/polb.22259] [Citation(s) in RCA: 1179] [Impact Index Per Article: 90.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Utilization of polymers as biomaterials has greatly impacted the advancement of modern medicine. Specifically, polymeric biomaterials that are biodegradable provide the significant advantage of being able to be broken down and removed after they have served their function. Applications are wide ranging with degradable polymers being used clinically as surgical sutures and implants. In order to fit functional demand, materials with desired physical, chemical, biological, biomechanical and degradation properties must be selected. Fortunately, a wide range of natural and synthetic degradable polymers has been investigated for biomedical applications with novel materials constantly being developed to meet new challenges. This review summarizes the most recent advances in the field over the past 4 years, specifically highlighting new and interesting discoveries in tissue engineering and drug delivery applications.
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Affiliation(s)
- Bret D. Ulery
- Department of Orthopaedic Surgery, New England Musculoskeletal Institute, University of Connecticut Health Center, Farmington, Connecticut 06030
- Institute of Regenerative Engineering, University of Connecticut Health Center, Farmington, Connecticut 06030
| | - Lakshmi S. Nair
- Department of Orthopaedic Surgery, New England Musculoskeletal Institute, University of Connecticut Health Center, Farmington, Connecticut 06030
- Institute of Regenerative Engineering, University of Connecticut Health Center, Farmington, Connecticut 06030
- Department of Chemical, Materials & Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06268
| | - Cato T. Laurencin
- Department of Orthopaedic Surgery, New England Musculoskeletal Institute, University of Connecticut Health Center, Farmington, Connecticut 06030
- Institute of Regenerative Engineering, University of Connecticut Health Center, Farmington, Connecticut 06030
- Department of Chemical, Materials & Biomolecular Engineering, University of Connecticut, Storrs, Connecticut 06268
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Teshima T, Ishihara H, Iwai K, Adachi A, Takeuchi S. A dynamic microarray device for paired bead-based analysis. LAB ON A CHIP 2010; 10:2443-8. [PMID: 20697655 DOI: 10.1039/c004986g] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
In this study, we have developed a meander-shaped dynamic microfluidic technology that allows us to pair two different types of microbeads in a trapping site. The dynamic microfluidic technology comprises implemented modifications of a conventional dynamic microarray design such as: (i) the combination of a meander-shaped by-pass channel and a trapping channel with a hydrodynamic trapping site and (ii) line-symmetrical formation of the by-pass and trapping channels. Using these modifications, we have successfully trapped different types of sample in one trapping site, and constructed an array of paired beads of different type such as polystyrene beads or hydrogel beads made of agarose, collagen or alginate. We found that this meander-shaped dynamic microfluidic technology is applicable for the observation of interactions between the paired beads such as molecular diffusion.
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Affiliation(s)
- Tetsuhiko Teshima
- Institute of Industrial Science, The University of Tokyo, Meguro-ku, Japan
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Alginate-controlled formation of nanoscale calcium carbonate and hydroxyapatite mineral phase within hydrogel networks. Acta Biomater 2010; 6:3665-75. [PMID: 20359556 DOI: 10.1016/j.actbio.2010.03.034] [Citation(s) in RCA: 61] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2010] [Revised: 03/22/2010] [Accepted: 03/23/2010] [Indexed: 11/22/2022]
Abstract
A one-step method was used to make nanostructured composites from alginate and calcium carbonate or calcium phosphate. Nanometer-scale mineral phase was successfully formed within the gel network of alginate gel beads, and the composites were characterized. It was found that calcite was the dominating polymorph in the calcium carbonate mineralized beads, while stoichiometric hydroxyapatite was formed in the calcium phosphate mineralized beads. A combination of electron microscopy, Fourier-transform infrared spectroscopy, thermogravimetric analysis and powder X-ray diffraction showed that alginate played an active role in controlling mineral size, morphology and polymorphy. For the calcium phosphate mineralized beads, alginate was shown to modulate stoichiometric hydroxyapatite with low crystallinity at room temperature, which may have important applications in tissue engineering. The results presented in this work demonstrate important aspects of alginate-controlled crystallization, which contributes to the understanding of composite material design.
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