TY - JOUR
T1 - Effect of topical hyaluronic acid on experimental cholesteatoma
AU - White, Steven J.
AU - Wright, Charles G.
AU - Robinson, Karen S.
AU - Meyerhoff, William L.
N1 - Funding Information:
The experimental protocol for this study was reviewed and approved by the Institutional Review Board for Animal Research at the University of Texas Southwestern Medical Center at Dallas before the investigation was begun.
PY - 1995
Y1 - 1995
N2 - Purpose: Inflammation and connective tissue hyperplasia are believed to be important etiological factors in cholesteatoma pathogenesis. Previous work has shown that topically applied hyaluronic acid can reduce connective tissue proliferation in healing wounds and accelerate healing of tympanic membrane perforations. This study was undertaken to determine whether the anti proliferative effect of hyaluronic acid may inhibit propylene glycol-induced cholesteatoma in an animal model. Materials and Methods: A 60% propylene glycol solution was injected bilaterally into the middle ear cavities of 20 adult chinchillas. The control group (N = 10) received propylene glycol alone. In addition to propylene glycol injections, the experimental group (N = 10) received repeated bilateral topical applications of 1.5% hyaluronic acid onto the tympanic membranes. Animals were killed at 4 weeks for gross and light microscopic examination. Results: Seven control and 10 experimental animals survived the full 1-month study period. At the end of that time, cholesteatoma was found in 71% (10/14) of control ears and 70% (14/20) of experimental ears. Tympanic membrane structure did not differ significantly between groups by light microscopy and, in all animals, cholesteatomas originated by migration of hyperplastic epidermis through the tympanic membrane, as has been observed in previous studies using this animal model. Conclusion: Under the conditions of this study, topical hyaluronic acid had no significant effect on cholesteatoma formation.
AB - Purpose: Inflammation and connective tissue hyperplasia are believed to be important etiological factors in cholesteatoma pathogenesis. Previous work has shown that topically applied hyaluronic acid can reduce connective tissue proliferation in healing wounds and accelerate healing of tympanic membrane perforations. This study was undertaken to determine whether the anti proliferative effect of hyaluronic acid may inhibit propylene glycol-induced cholesteatoma in an animal model. Materials and Methods: A 60% propylene glycol solution was injected bilaterally into the middle ear cavities of 20 adult chinchillas. The control group (N = 10) received propylene glycol alone. In addition to propylene glycol injections, the experimental group (N = 10) received repeated bilateral topical applications of 1.5% hyaluronic acid onto the tympanic membranes. Animals were killed at 4 weeks for gross and light microscopic examination. Results: Seven control and 10 experimental animals survived the full 1-month study period. At the end of that time, cholesteatoma was found in 71% (10/14) of control ears and 70% (14/20) of experimental ears. Tympanic membrane structure did not differ significantly between groups by light microscopy and, in all animals, cholesteatomas originated by migration of hyperplastic epidermis through the tympanic membrane, as has been observed in previous studies using this animal model. Conclusion: Under the conditions of this study, topical hyaluronic acid had no significant effect on cholesteatoma formation.
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U2 - 10.1016/0196-0709(95)90059-4
DO - 10.1016/0196-0709(95)90059-4
M3 - Article
C2 - 7503374
AN - SCOPUS:0029080609
SN - 0196-0709
VL - 16
SP - 312
EP - 318
JO - American Journal of Otolaryngology--Head and Neck Medicine and Surgery
JF - American Journal of Otolaryngology--Head and Neck Medicine and Surgery
IS - 5
ER -