Accelerating functional recovery after rat facial nerve injury: Effects of gonadal steroids and electrical stimulation

We investigated the combined effects of electrical stimulation and testosterone propionate on overall recovery time in rats with extracranial crush injuries to the facial nerve. Male rats underwent castration 3 to 5 days prior to right facial nerve crush injury and electrode implantation. Rats were...

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Veröffentlicht in:Otolaryngology-head and neck surgery 2008-07, Vol.139 (1), p.62-67
Hauptverfasser: Hetzler, Laura E.T., Sharma, Nijee, Tanzer, Lisa, Wurster, Robert D., Leonetti, John, Marzo, Sam J., Jones, Kathryn J., Foecking, Eileen M.
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container_end_page 67
container_issue 1
container_start_page 62
container_title Otolaryngology-head and neck surgery
container_volume 139
creator Hetzler, Laura E.T.
Sharma, Nijee
Tanzer, Lisa
Wurster, Robert D.
Leonetti, John
Marzo, Sam J.
Jones, Kathryn J.
Foecking, Eileen M.
description We investigated the combined effects of electrical stimulation and testosterone propionate on overall recovery time in rats with extracranial crush injuries to the facial nerve. Male rats underwent castration 3 to 5 days prior to right facial nerve crush injury and electrode implantation. Rats were randomly assigned to two groups: crush injury + testosterone or crush injury with electrical stimulation + testosterone. Recovery was assessed by daily subjective examination documenting vibrissae orientation/movement, semi–eye blink, and full eye blink. Milestones of early recovery were noted to be significantly earlier in the groups with electrical stimulation, with/without testosterone. The addition of testosterone to electrical stimulation showed significant earlier return of late recovery parameters and complete overall recovery. Electrical stimulation may decrease cell death or promote sprouting to accelerate early recovery. Testosterone may affect the actual rate of axonal regeneration and produce acceleration in functional recovery. By targeting different stages of neural regeneration, the synergy of electrical stimulation and testosterone appears to have promise as a neurotherapeutic strategy for facial nerve injury.
doi_str_mv 10.1016/j.otohns.2008.02.006
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source MEDLINE; Wiley Online Library Journals Frontfile Complete; SAGE Complete; Alma/SFX Local Collection
subjects Animals
Combined Modality Therapy
Electric Stimulation Therapy
Electrodes, Implanted
Facial Nerve Injuries - therapy
Male
Rats
Rats, Sprague-Dawley
Testosterone Propionate - administration & dosage
Testosterone Propionate - therapeutic use
Wound Healing - drug effects
Wound Healing - physiology
title Accelerating functional recovery after rat facial nerve injury: Effects of gonadal steroids and electrical stimulation
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