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Pruett LJ, Kenny HL, Swift WM, Catallo KJ, Apsel ZR, Salopek LS, Scumpia PO, Cottler PS, Griffin DR, Daniero JJ. De novo tissue formation using custom microporous annealed particle hydrogel provides long-term vocal fold augmentation. NPJ Regen Med 2023; 8:10. [PMID: 36823180 PMCID: PMC9950481 DOI: 10.1038/s41536-023-00281-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2022] [Accepted: 01/25/2023] [Indexed: 02/25/2023] Open
Abstract
Biomaterial-enabled de novo formation of non-fibrotic tissue in situ would provide an important tool to physicians. One example application, glottic insufficiency, is a debilitating laryngeal disorder wherein vocal folds do not fully close, resulting in difficulty speaking and swallowing. Preferred management of glottic insufficiency includes bulking of vocal folds via injectable fillers, however, the current options have associated drawbacks including inflammation, accelerated resorption, and foreign body response. We developed a novel iteration of microporous annealed particle (MAP) scaffold designed to provide persistent augmentation. Following a 14-month study of vocal fold augmentation using a rabbit vocal paralysis model, most MAP scaffolds were replaced with tissue de novo that matched the mixture of fibrotic and non-fibrotic collagens of the contralateral vocal tissue. Further, persistent tissue augmentation in MAP-treated rabbits was observed via MRI and via superior vocal function at 14 months relative to the clinical standard.
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Affiliation(s)
- Lauren J. Pruett
- grid.27755.320000 0000 9136 933XDepartment of Biomedical Engineering, University of Virginia, Charlottesville, VA 22903 USA
| | - Hannah L. Kenny
- grid.27755.320000 0000 9136 933XSchool of Medicine, University of Virginia, Charlottesville, VA 22903 USA
| | - William M. Swift
- grid.27860.3b0000 0004 1936 9684Department of Otolaryngology-Head and Neck Surgery, University of California, Davis, CA 95616 USA
| | - Katarina J. Catallo
- grid.27755.320000 0000 9136 933XDepartment of Biomedical Engineering, University of Virginia, Charlottesville, VA 22903 USA
| | - Zoe R. Apsel
- grid.27755.320000 0000 9136 933XDepartment of Biomedical Engineering, University of Virginia, Charlottesville, VA 22903 USA
| | - Lisa S. Salopek
- grid.27755.320000 0000 9136 933XDepartment of Plastic Surgery, University of Virginia, Charlottesville, VA 22903 USA
| | - Philip O. Scumpia
- grid.19006.3e0000 0000 9632 6718Department of Medicine, Division of Dermatology and Department of Pathology, Division of Dermatopathology, University of California, Los Angeles, CA 90095 USA
| | - Patrick S. Cottler
- grid.27755.320000 0000 9136 933XDepartment of Plastic Surgery, University of Virginia, Charlottesville, VA 22903 USA
| | - Donald R. Griffin
- grid.27755.320000 0000 9136 933XDepartment of Biomedical Engineering, University of Virginia, Charlottesville, VA 22903 USA ,grid.27755.320000 0000 9136 933XDepartment of Chemical Engineering, University of Virginia, Charlottesville, VA 22903 USA
| | - James J. Daniero
- grid.27755.320000 0000 9136 933XDepartment of Otolaryngology-Head and Neck Surgery, University of Virginia, Charlottesville, VA 22903 USA
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Pruett LJ, Jenkins CH, Singh NS, Catallo KJ, Griffin DR. Heparin Microislands in Microporous Annealed Particle Scaffolds for Accelerated Diabetic Wound Healing. Adv Funct Mater 2021; 31. [PMID: 34539306 PMCID: PMC8447473 DOI: 10.1002/adfm.202104337] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/04/2023]
Affiliation(s)
- Lauren J. Pruett
- Department of Biomedical Engineering University of Virginia 415 Lane Rd Charlottesville VA 22908 USA
| | - Christian H. Jenkins
- Department of Biomedical Engineering University of Virginia 415 Lane Rd Charlottesville VA 22908 USA
| | - Neharika S. Singh
- Department of Biomedical Engineering University of Virginia 415 Lane Rd Charlottesville VA 22908 USA
| | - Katarina J. Catallo
- Department of Biomedical Engineering University of Virginia 415 Lane Rd Charlottesville VA 22908 USA
| | - Donald R. Griffin
- Department of Biomedical Engineering University of Virginia 415 Lane Rd Charlottesville VA 22908 USA
- Department of Chemical Engineering University of Virginia 102 Engineer's Way Charlottesville VA 22904 USA
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Pfaff BN, Pruett LJ, Cornell NJ, de Rutte J, Di Carlo D, Highley CB, Griffin DR. Selective and Improved Photoannealing of Microporous Annealed Particle (MAP) Scaffolds. ACS Biomater Sci Eng 2021; 7:422-427. [PMID: 33423459 DOI: 10.1021/acsbiomaterials.0c01580] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Microporous annealed particle (MAP) scaffolds consist of a slurry of hydrogel microspheres that undergo annealing to form a solid scaffold. MAP scaffolds have contained functional groups with dual abilities to participate in Michael-type addition (gelation) and radical polymerization (photoannealing). Functional groups with efficient Michael-type additions react with thiols and amines under physiological conditions, limiting usage for therapeutic delivery. We present a heterofunctional maleimide/methacrylamide 4-arm PEG macromer (MethMal) engineered for selective photopolymerization compatible with multiple polymer backbones. Rheology using two classes of photoinitiators demonstrates advantageous photopolymerization capabilities. Functional assays show benefits for therapeutic delivery and 3D printing without impacting cell viability.
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Affiliation(s)
- Blaise N Pfaff
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Lauren J Pruett
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Nicholas J Cornell
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Joseph de Rutte
- Department of Bioengineering, University of California-Los Angeles, Los Angeles, California 20095, United States
| | - Dino Di Carlo
- Department of Bioengineering, University of California-Los Angeles, Los Angeles, California 20095, United States
| | - Christopher B Highley
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia 22904, United States.,Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
| | - Donald R Griffin
- Department of Biomedical Engineering, University of Virginia, Charlottesville, Virginia 22904, United States.,Department of Chemical Engineering, University of Virginia, Charlottesville, Virginia 22904, United States
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