Authors: Suehiro, Atsushi; Hirano, Shigeru¹; Kishimoto, Yo¹; Rousseau, Bernard²; Nakamura, Tatsuo³; Ito, Juichi¹

Source: Acta Oto-Laryngologica, Volume 130, Number 7, July 2010 , pp. 844-850(7)

Publisher: Informa Healthcare

Abstract:

<title>Abstract</title>

Conclusions: Results of the current study revealed improved phonation threshold pressure (PTP), normalized mucosal wave amplitude (NMWA), and less contraction of the lamina propria in injured larynges treated with basic fibroblast growth factor (bFGF). Objectives: We investigated the effects of local injection of bFGF for treatment of acute vocal fold injury in a canine model. Methods: Vocal folds of eight beagles were unilaterally injured by removal of the mucosa under direct laryngoscopy. Four beagles received local injections of bFGF delivered to the scarred vocal fold at 1 month after injury. The remaining four beagles received local injections of saline and served as a sham-treatment group. Larynges were harvested 5 months after treatment and excised larynx experiments were performed to measure PTP, NMWA, and normalized glottal gap (NGG). Histologic staining was performed to evaluate structural changes of the extracellular matrix. Results: Excised larynx measurements revealed significantly lower PTP and increased NMWA in bFGF-treated vocal fold. Elastica Van Gieson staining revealed less contraction of the bFGF-treated vocal fold. Histologic measurements revealed that the thickness of the lamina propria was significantly greater in the bFGF-treated vocal fold. Alcian blue staining revealed improved restoration of hyaluronic acid in the bFGF-treated vocal fold.

Keywords: Injection therapy; phonation threshold pressure; normalized mucosal wave amplitude

Document Type: Research article

DOI: http://dx.doi.org/10.3109/00016480903426618

Affiliations: 1: 1Department of Otolaryngology-Head & Neck Surgery, Graduate School of Medicine, Kyoto University, Kyoto, Japan 2: 2Department of Otolaryngology, Vanderbilt University, Bill Wilkerson Center for Otolaryngology and Communication Sciences, Nashville, TN, USA 3: 3Institute for Frontier Medical Science, Kyoto University, Kyoto, Japan

Publication date: 2010-07-01

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