Gary Gartling PhD, Lea Sayce DPhil, Zachary Zimmerman MS, Alysha Slater MS, Lizzie Hary MS, Wenqing Yang MA, Michele Santacatterina PhD, Bernard Rousseau PhD, Ryan C. Branski PhD
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Seven days after injury, animals received bilateral 20 μL intracordal injections of saline, dexamethasone, methylprednisolone, or triamcinolone (<i>n</i> = 15 per condition). Five rabbits in each condition were euthanized 1, 7, or 60 days following treatment. An additional five animals served as non-injured/untreated controls. To quantify transepithelial electrical resistance (TEER), 1 mm epithelial biopsies were placed in an Ussing chamber. The contralateral VF was processed for transmission electron microscopy and epithelial depth analysis.</p>\n </section>\n \n <section>\n \n <h3> Results</h3>\n \n <p>At 60 days, GC treatment maintained TEER levels similar to non-injured/untreated controls. However, triamcinolone reduced TEER compared with saline-treated conditions. Acutely, epithelial hyperplasia typically persisted in all injured VFs. At 60 days, only dexamethasone and triamcinolone increased epithelial depth in injured VFs; all GCs increased epithelial depth compared with non-injured/untreated controls.</p>\n </section>\n \n <section>\n \n <h3> Conclusion</h3>\n \n <p>Acutely, GCs did not alter TEER. Additionally, GCs did not alter epithelial depth compared with saline treatment, indicating alignment with natural healing responses. At 60 days, GCs exhibited varying degrees of TEER restoration and epithelial hyperplasia, possibly due to distinct pharmacodynamic profiles.</p>\n </section>\n \n <section>\n \n <h3> Level of Evidence</h3>\n \n <p>NA <i>Laryngoscope</i>, 135:206–212, 2025</p>\n </section>\n </div>","PeriodicalId":49921,"journal":{"name":"Laryngoscope","volume":"135 1","pages":"206-212"},"PeriodicalIF":2.2000,"publicationDate":"2024-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":"{\"title\":\"Acute Effects of Steroids on Vocal Fold Epithelium Post-injury in a Preclinical Model\",\"authors\":\"Gary Gartling PhD, Lea Sayce DPhil, Zachary Zimmerman MS, Alysha Slater MS, Lizzie Hary MS, Wenqing Yang MA, Michele Santacatterina PhD, Bernard Rousseau PhD, Ryan C. Branski PhD\",\"doi\":\"10.1002/lary.31729\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div>\\n \\n <section>\\n \\n <h3> Introduction</h3>\\n \\n <p>Glucocorticoids (GCs) are commonly prescribed for laryngeal indications due to their potent anti-inflammatory properties. However, GCs effect on vocal fold (VF) epithelial morphology and barrier function following injury is overlooked and may be key to efficacy. In this study, the effects of GCs on epithelial morphology and barrier function were quantified in injured VFs. We seek to increase our understanding of biochemical processes underlying GC mechanisms to refine therapeutic strategies.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Methods</h3>\\n \\n <p>Microflap injury was induced in 65 rabbits. Seven days after injury, animals received bilateral 20 μL intracordal injections of saline, dexamethasone, methylprednisolone, or triamcinolone (<i>n</i> = 15 per condition). Five rabbits in each condition were euthanized 1, 7, or 60 days following treatment. An additional five animals served as non-injured/untreated controls. To quantify transepithelial electrical resistance (TEER), 1 mm epithelial biopsies were placed in an Ussing chamber. The contralateral VF was processed for transmission electron microscopy and epithelial depth analysis.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Results</h3>\\n \\n <p>At 60 days, GC treatment maintained TEER levels similar to non-injured/untreated controls. However, triamcinolone reduced TEER compared with saline-treated conditions. Acutely, epithelial hyperplasia typically persisted in all injured VFs. At 60 days, only dexamethasone and triamcinolone increased epithelial depth in injured VFs; all GCs increased epithelial depth compared with non-injured/untreated controls.</p>\\n </section>\\n \\n <section>\\n \\n <h3> Conclusion</h3>\\n \\n <p>Acutely, GCs did not alter TEER. 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Acute Effects of Steroids on Vocal Fold Epithelium Post-injury in a Preclinical Model
Introduction
Glucocorticoids (GCs) are commonly prescribed for laryngeal indications due to their potent anti-inflammatory properties. However, GCs effect on vocal fold (VF) epithelial morphology and barrier function following injury is overlooked and may be key to efficacy. In this study, the effects of GCs on epithelial morphology and barrier function were quantified in injured VFs. We seek to increase our understanding of biochemical processes underlying GC mechanisms to refine therapeutic strategies.
Methods
Microflap injury was induced in 65 rabbits. Seven days after injury, animals received bilateral 20 μL intracordal injections of saline, dexamethasone, methylprednisolone, or triamcinolone (n = 15 per condition). Five rabbits in each condition were euthanized 1, 7, or 60 days following treatment. An additional five animals served as non-injured/untreated controls. To quantify transepithelial electrical resistance (TEER), 1 mm epithelial biopsies were placed in an Ussing chamber. The contralateral VF was processed for transmission electron microscopy and epithelial depth analysis.
Results
At 60 days, GC treatment maintained TEER levels similar to non-injured/untreated controls. However, triamcinolone reduced TEER compared with saline-treated conditions. Acutely, epithelial hyperplasia typically persisted in all injured VFs. At 60 days, only dexamethasone and triamcinolone increased epithelial depth in injured VFs; all GCs increased epithelial depth compared with non-injured/untreated controls.
Conclusion
Acutely, GCs did not alter TEER. Additionally, GCs did not alter epithelial depth compared with saline treatment, indicating alignment with natural healing responses. At 60 days, GCs exhibited varying degrees of TEER restoration and epithelial hyperplasia, possibly due to distinct pharmacodynamic profiles.
期刊介绍：
The Laryngoscope has been the leading source of information on advances in the diagnosis and treatment of head and neck disorders since 1890. The Laryngoscope is the first choice among otolaryngologists for publication of their important findings and techniques. Each monthly issue of The Laryngoscope features peer-reviewed medical, clinical, and research contributions in general otolaryngology, allergy/rhinology, otology/neurotology, laryngology/bronchoesophagology, head and neck surgery, sleep medicine, pediatric otolaryngology, facial plastics and reconstructive surgery, oncology, and communicative disorders. Contributions include papers and posters presented at the Annual and Section Meetings of the Triological Society, as well as independent papers, "How I Do It", "Triological Best Practice" articles, and contemporary reviews. Theses authored by the Triological Society’s new Fellows as well as papers presented at meetings of the American Laryngological Association are published in The Laryngoscope.
• Broncho-esophagology
• Communicative disorders
• Head and neck surgery
• Plastic and reconstructive facial surgery
• Oncology
• Speech and hearing defects
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