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ÎÄÏ×±êʶÂë:A
ÎÄÕ±àºÅ:1673-8225
(2008)11-02006-04

ÊÕ¸åÈÕÆÚ£º2007-08-18
ÐÞ»ØÈÕÆÚ£º2007-10-07
(07-50-8-4495/W¡¤Y)


In vitro study of populating Schwann cell into acellular nerve allograft: Feasibility of applying tissue engineered artificial nerve

Abstract

AIM:It is universally accepted that Schwann cells are the seed cell for preparing tissue engineered artificial nerve. Fetus rabbit nerve system has been developed completely, and immune system is still immature. This study discussed the feasibility of populating fetus rabbit Schwann cells into acellular nerve bridging allograft and preparing tissue engineered artificial nerve to repair the peripheral nerve defects.
METHODS: The experiment was carried out in the Third Hospital of Hebei Medical University between March 2005 and March 2006.¢ÙTwo New Zealand rabbits of SPF grade, 28-day pregnancy, and one adult New Zealand rabbit.¢ÚExperimental managements included three steps: culture of the fetus rabbit Schwann cells, preparation of acellular nerve bridging and in vitro graft of Schwann cells and acellular nerve bridging. Enzyme digestion (trypsin/collagenase) was applied to culture Schwann cells, which were then micro-injected into nerves that had been treated with 3% TritonX-100 for 96 hours.¢ÛThe paraffin section was sampled at 1, 3, 5 days of culture and the growth of Schwann cells in bridging graft was observed by hematoxylin-eosin staining.
RESULTS: ¢ÙWe achieved a large amount of high purity (above 90%) Schwann cells by the nerve growth factor, which promoted Schwann cells, added in the culture medium at the latter stage, and double 30-min differential adhesion culture and Arab-c prohibition methods at the early stage of culture were applied to remove fibroblasts.¢ÚSchwann cells, axons and myelin sheaths could be successfully removed after treated by 3% Triton X-100 for 96 hours. The basal lamin tubes and collagen fibers structure remained intact. Moreover, the main component of nerve basement membrane-laminin was not damaged.¢ÛSchwann cells from fetus rabbit sciatic nerve grew well in the acellular nerve bridge graft of adult rabbit, and migrated in rows.
CONCLUSION: The acellular nerve allografts populated Schwann cells may be an ideal way to prepare tissue-engineered nerve graft.

Han JB, Gao HY, Zhao BH, Han JH, Chen JW. In vitro study of populating Schwann cell into acellular nerve allograft: Feasibility of applying tissue engineered artificial nerve.Zhongguo Zuzhi Gongcheng Yanjiu yu Linchuang Kangfu 2008;12(11):2006-2010(China) [www.zglckf.com/zglckf/ejournal/upfiles/08-11/11k-2006(ps).pdf]

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