The Effect of Insulin Like Growth Factor-1 on Recovery of Facial Nerve Crush Injury.
- Author:
Asuman Feda BAYRAK
1
;
Yuksel OLGUN
;
Ayla OZBAKAN
;
Safiye AKTAS
;
Can Ahmet KULAN
;
Gonca KAMACI
;
Emine DEMIR
;
Osman YILMAZ
;
Levent OLGUN
Author Information
- Publication Type:Original Article
- Keywords: Insulin-Like Growth Factor I; Facial Nerve Injuries; Therapy; Animal Model
- MeSH: Action Potentials; Animals; Axons; Cell Proliferation; Demyelinating Diseases; Facial Nerve Injuries; Facial Nerve*; Insulin*; Insulin-Like Growth Factor I; Models, Animal; Myelin Sheath; Rabbits; Schwann Cells; Sodium Chloride
- From:Clinical and Experimental Otorhinolaryngology 2017;10(4):296-302
- CountryRepublic of Korea
- Language:English
- Abstract: OBJECTIVES: The aim of this study is to investigate the efficacy of locally applied insulin-like growth factor 1 (IGF-1) on the recovery of facial nerve functions after crush injury in a rabbit model. METHODS: The rabbits were randomly assigned into three groups. Group 1 consisted of the rabbits with crush injury alone; group 2, the animals applied saline solution onto the crushed facial nerve and group 3, IGF-1 implemented to the nerve in the same manner. Facial nerve injury was first electrophysiologically studied on 10th and 42nd days of the procedure. The damage to the facial nerves was then investigated histopathologically, after sacrification of the animals. RESULTS: In the electrophysiological study, compound muscle action potential amplitudes of the crushed nerves in the second group were decreased. In pathological specimens of the first and second groups, the orders of axons were distorted; demyelination and proliferation of Schwann cells were observed. However, in IGF-1 treated group axonal order and myelin were preserved, and Schwann cell proliferation was close to normal (P < 0.05). CONCLUSION: Local application of IGF-1 in a slow releasing gel was found efficacious in the recovery of the facial nerve crush injury in rabbits. IGF-1 was considered worthy of being tried in clinical studies in facial nerve injury cases.
