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Functional Hydrogels and Their Application in Drug Delivery, Biosensors, and Tissue Engineering. INT J POLYM SCI 2019. [DOI: 10.1155/2019/3160732] [Citation(s) in RCA: 29] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Hydrogel is a new class of functional polymer materials with a promising potential in the biomedical field. The purpose of this article is to review recent advancements in several types of biomedical hydrogels, including conductive hydrogels, injectable hydrogels, double network hydrogels, responsive hydrogels, nanocomposite hydrogels, and sliding hydrogels. In comparison with traditional hydrogels, these advanced hydrogels exhibit significant advantages in structure, mechanical properties, and applications. The article focuses on different methods used to prepare advanced biomedical hydrogels and their diversified applications as drug delivery systems, wound dressings, biosensors, contact lenses, and tissue replacement. These advances are rapidly overcoming current limitations of hydrogels, and we anticipate that further research will lead to the development of advanced hydrogels with ubiquitous roles in biomedicine and tissue replacement and regeneration.
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Development of a nanofibrous wound dressing with an antifibrogenic propertiesin vitroandin vivomodel. J Biomed Mater Res A 2016; 104:2334-44. [DOI: 10.1002/jbm.a.35770] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2015] [Revised: 04/26/2016] [Accepted: 04/29/2016] [Indexed: 12/12/2022]
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Sridhar. BV, Dailing EA, Brock JL, Stansbury JW, Randolph MA, Anseth KS. A Biosynthetic Scaffold that Facilitates Chondrocyte-Mediated Degradation and Promotes Articular Cartilage Extracellular Matrix Deposition. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2015; 1:11-21. [PMID: 26900597 PMCID: PMC4758520 DOI: 10.1007/s40883-015-0002-3] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Articular cartilage remains a significant clinical challenge to repair because of its limited self-healing capacity. Interest has grown in the delivery of autologous chondrocytes to cartilage defects, and combining cell-based therapies with scaffolds that capture aspects of native tissue and allow cell-mediated remodeling could improve outcomes. Currently, scaffold-based therapies with encapsulated chondrocytes permit matrix production; however, resorption of the scaffold often does not match the rate of matrix production by chondrocytes, which can limit functional tissue regeneration. Here, we designed a hybrid biosynthetic system consisting of poly (ethylene glycol) (PEG) endcapped with thiols and crosslinked by norbornene-functionalized gelatin via a thiol-ene photopolymerization. The protein crosslinker was selected to facilitate chondrocyte-mediated scaffold remodeling and matrix deposition. Gelatin was functionalized with norbornene to varying degrees (~4-17 norbornenes/gelatin), and the shear modulus of the resulting hydrogels was characterized (<0.1-0.5 kPa). Degradation of the crosslinked PEG-gelatin hydrogels by chondrocyte-secreted enzymes was confirmed by gel permeation chromatography. Finally, chondrocytes encapsulated in these biosynthetic scaffolds showed significantly increased glycosaminoglycan deposition over just 14 days of culture, while maintaining high levels of viability and producing a distributed matrix. These results indicate the potential of a hybrid PEG-gelatin hydrogel to permit chondrocyte-mediated remodeling and promote articular cartilage matrix production. Tunable scaffolds that can easily permit chondrocyte-mediated remodeling may be useful in designing treatment options for cartilage tissue engineering applications.
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Affiliation(s)
- Balaji V. Sridhar.
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado
- BioFrontiers Institute, University of Colorado, Boulder, Colorado
| | - Eric A. Dailing
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado
| | - J. Logan Brock
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado
- BioFrontiers Institute, University of Colorado, Boulder, Colorado
| | - Jeffrey W. Stansbury
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado
- Department of Craniofacial Biology, School of Dental Medicine, University of Colorado, Aurora, Colorado
| | - Mark A. Randolph
- Department of Orthopedic Surgery, Laboratory for Musculoskeletal Tissue Engineering, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
- Plastic Surgery Research Laboratory, Division of Plastic Surgery, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts
| | - Kristi S. Anseth
- Department of Chemical and Biological Engineering, University of Colorado, Boulder, Colorado
- BioFrontiers Institute, University of Colorado, Boulder, Colorado
- Howard Hughes Medical Institute, University of Colorado, Boulder, Colorado
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