[Histomorphology observation of canine whole facial nerve treated with chemically extracted acellular methods].
OBJECTIVE
Using chemically extracted acellular methods to treat extracranial section of the canine whole facial nerve, to evaluated its effects on nerve structure and the removal extent of Schwann cells and myelin.


METHODS
Twenty whole facial nerves were exposed from 10 canines [weighing (18 +/- 3) kg]. The extracranial trunk of canine facial nerve and its branches (temporal branch, zygomatic branch, buccal branch, marginal mandibular branch, and cervical branch) were dissected under light microscope. Twenty facial nerves were divided into the experimental group (n = 12) and control group (n = 8) randomly. In experimental group, the nerve was extracted with the 3%TritonX-100 and 4% sodium deoxycholate. In control group, the nerve was not extracted. HE staining and immunofluorescence histological stainings for Hoechst33258, P75, Zero, and Laminin were performed.


RESULTS
After histological staining, it was found that myelin and Schwann cells were removed from the facial nerve while the basal lamina tube remained intact. The whole canine facial nerves (one nerve trunk and multiple nerve branches) had the similar result.


CONCLUSIONS
The canine whole facial nerve has natural structure (one nerve trunk and multiple nerve branches) by extracted with chemically extracted acellular methods, so it is an available graft for repairing the defect of the whole facial nerve.
Yang
Yu
Y
Institute of Orthopedics, General Hospital of Chinese PLA, Beijing, P.R. China.
Peng
Jiang
J
Wang
Yu
Y
Yang
Qiyou
Q
Zhao
Bin
B
Sui
Xiang
X
Zhang
Li
L
Wang
Xin
X
Xu
Wenjing
W
Zhao
Zhe
Z
Zhan
Shengfeng
S
Lu
Shibi
S
D000818:Animals; D004285:Dogs; D005154:Facial Nerve / Q000033:anatomy & histology*; D015200:Fluoroimmunoassay; D007797:Laminin / Q000032:analysis; D018993:Myelin P0 Protein / Q000032:analysis; D009416:Nerve Regeneration; D012583:Schwann Cells / Q000737:chemistry* / Q000166:cytology*
D007797:Laminin; D018993:Myelin P0 Protein