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Hu JJ, Zou CY, Wang R, Lei XX, Chen MJ, Xiong M, Jiang YL, Li-Ling J, Xie HQ, Yang H. An Acquired Anterior Glottic Web Model by Heat Injury with a Laryngoscopic Approach in a Rabbit. Tissue Eng Part C Methods 2023; 29:11-19. [PMID: 36463426 DOI: 10.1089/ten.tec.2022.0161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/07/2022] Open
Abstract
Acquired anterior glottic webs (AGW) can lead to abnormally elevated phonatory pitch, dysphonia, and airway obstruction requiring urgent intervention. In this study, we construct a novel AGW rabbit model using heat injury by a laryngoscopic way. A primary study was conducted to identify the injury depth in rabbits' vocal folds (VFs) by graded heat energy, and the heat energy for the incurrence of epithelial layer, lamina propria, and muscular layer (ML) injury was 25, 30 and 35 W, respectively. Then, four different models were designed based on the depth and degree of the injury to determine the optimal procedure for AGW formation. Morphological features, vibratory capacity, and histopathologic features of the AGW were correspondingly evaluated. The procedure for conferring the heat injury to the depth of ML and the extent of anterior commissure and middle part of bilateral VFs showed the highest success rate of AGW formation (95%, 19/20). For its low cost, effectiveness, and stability for AGW formation, the heat injury rabbit model with a laryngoscopic approach may provide a new platform for testing novel anti-adhesion materials and bioengineered therapies. Impact Statement Tissue engineering based on biomaterials has been a very hot research field and may be introduced to prevent the acquired anterior glottic web (AGW) formation. However, lacking a widely recognized animal model for AGW has limited the trial of anti-adhesion materials in the larynx. In this study, we have developed a novel rabbit model for AGW formation by conferring a heat injury under a laryngoscope; this model is cheap, effective, and stable for the anti-adhesion materials and bioengineered therapies. Thus, this research would arouse crucial interest and be widely employed.
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Affiliation(s)
- Juan-Juan Hu
- Department of Otorhinolaryngology, Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu, P.R. China.,Laboratory of Stem Cell and Tissue Engineering, Orthopedic Research Institute, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Chen-Yu Zou
- Laboratory of Stem Cell and Tissue Engineering, Orthopedic Research Institute, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Rui Wang
- Laboratory of Stem Cell and Tissue Engineering, Orthopedic Research Institute, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Xiong-Xin Lei
- Laboratory of Stem Cell and Tissue Engineering, Orthopedic Research Institute, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Mao-Jia Chen
- Animal Experiment Center, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Ming Xiong
- Department of Otorhinolaryngology, Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu, P.R. China.,Laboratory of Stem Cell and Tissue Engineering, Orthopedic Research Institute, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Yan-Lin Jiang
- Laboratory of Stem Cell and Tissue Engineering, Orthopedic Research Institute, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Jesse Li-Ling
- Laboratory of Stem Cell and Tissue Engineering, Orthopedic Research Institute, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China.,Department of Medical Genetics, West China Second Hospital, Sichuan University, Chengdu, P.R. China
| | - Hui-Qi Xie
- Laboratory of Stem Cell and Tissue Engineering, Orthopedic Research Institute, State Key Laboratory of Biotherapy, West China Hospital, Sichuan University, Chengdu, P.R. China
| | - Hui Yang
- Department of Otorhinolaryngology, Head and Neck Surgery, West China Hospital, Sichuan University, Chengdu, P.R. China
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Miar S, Dion GR, Montelongo S, Ong JL, Bizios R, Guda T. Development of a Bioinspired, Self-Adhering, and Drug-Eluting Laryngotracheal Patch. Laryngoscope 2020; 131:1958-1966. [PMID: 33125169 DOI: 10.1002/lary.29182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 08/19/2020] [Accepted: 09/19/2020] [Indexed: 11/05/2022]
Abstract
OBJECTIVES/HYPOTHESIS Novel laryngotracheal wound coverage devices are limited by complex anatomy, smooth surfaces, and dynamic pressure changes and airflow during breathing. We hypothesize that a bioinspired mucoadhesive patch mimicking how geckos climb smooth surfaces will permit sutureless wound coverage and also allow drug delivery. STUDY DESIGN ex-vivo. METHODS Polycaprolactone (PCL) fibers were electrospun onto a substrate and polyethylene glycol (PEG) - acrylate flocks in varying densities were deposited to create a composite patch. Sample topography was assessed with laser profilometry, material stiffness with biaxial mechanical testing, and mucoadhesive testing determined cohesive material failure on porcine tracheal tissue. Degradation rate was measured over 21 days in vitro along with dexamethasone drug release profiles. Material handleability was evaluated via suture retention and in cadaveric larynges. RESULTS Increased flocking density was inversely related to cohesive failure in mucoadhesive testing, with a flocking density of PCL-PEG-2XFLK increasing failure strength to 6880 ± 1810 Pa compared to 3028 ± 791 in PCL-PEG-4XFLK density and 1182 ± 262 in PCL-PEG-6XFLK density. The PCL-PEG-2XFLK specimens had a higher failure strength than PCL alone (1404 ± 545 Pa) or PCL-PEG (2732 ± 840). Flocking progressively reduced composite stiffness from 1347 ± 15 to 763 ± 21 N/m. Degradation increased from 12% at 7 days to 16% after 10 days and 20% after 21 days. Cumulative dexamethasone release at 0.4 mg/cm2 concentration was maintained over 21 days. Optimized PCL-PEG-2XFLK density flocked patches were easy to maneuver endoscopically in laryngeal evaluation. CONCLUSIONS This novel, sutureless, patch is a mucoadhesive platform suitable to laryngeal and tracheal anatomy with drug delivery capability. LEVEL OF EVIDENCE NA Laryngoscope, 131:1958-1966, 2021.
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Affiliation(s)
- Solaleh Miar
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, Texas, U.S.A
| | - Gregory R Dion
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, Texas, U.S.A.,Dental and Craniofacial Trauma Research Department, U.S. Army Institute of Surgical Research, San Antonio, Texas, U.S.A
| | - Sergio Montelongo
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, Texas, U.S.A
| | - Joo L Ong
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, Texas, U.S.A
| | - Rena Bizios
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, Texas, U.S.A
| | - Teja Guda
- Department of Biomedical Engineering, University of Texas at San Antonio, San Antonio, Texas, U.S.A
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