中国组织工程研究

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透明质酸在去细胞异体神经移植中对瘢痕的影响

刘英伟,张万里,池成涛,徐青雨,芦德智   

  1. 牡丹江医学院附属红旗医院,黑龙江省牡丹江市  157011
  • 收稿日期:2016-08-05 出版日期:2016-10-14 发布日期:2016-10-14
  • 通讯作者: 张万里,硕士,主治医师,牡丹江医学院附属红旗医院,黑龙江省牡丹江市 157011
  • 作者简介:刘英伟,女,1979年生,黑龙江省人,汉族,2008年哈尔滨医科大学毕业,硕士,主治医师,主要从事眼底病研究。
  • 基金资助:

    牡丹江市科学技术计划项目、攻关类(Z2015s0045)

Effects of hyaluronic acid on scar formation in the acellular nerve allograft

Liu Ying-wei, Zhang Wan-li, Chi Cheng-tao, Xu Qing-yu, Lu De-zhi   

  1. Hongqi Hospital Affiliated to Mudanjiang Medical University, Mudanjiang 157011, Heilongjiang Province, China
  • Received:2016-08-05 Online:2016-10-14 Published:2016-10-14
  • Contact: Zhang Wan-li, Master, Attending physician, Hongqi Hospital Affiliated to Mudanjiang Medical University, Mudanjiang 157011, Heilongjiang Province, China
  • About author:Liu Ying-Wei, Master, Attending physician, Hongqi Hospital Affiliated to Mudanjiang Medical University, Mudanjiang 157011, Heilongjiang Province, China
  • Supported by:

    the Key Technologies R&D Program of Mudanjiang, No. Z2015s0045

摘要:

文章快速阅读:

文题释义:
瘢痕:神经再生室内复杂的微环境条件会对神经纤维的延伸与重建产生影响,新生的神经轴突再生速度缓慢且没有穿透能力,一旦遇到炎性肉芽组织或瘢痕组织等障碍后,或者造成神经纤维生长扭曲,或者发生创伤性神经瘤的失败后果。如何防止周围神经损伤局部炎症区的炎性渗出物及纤维结缔组织不长入神经断端,是防止神经纤维瘤形成的关键。
去细胞异体神经:在众多的桥接修复神经缺损的替代载体中,异体神经一直是人们想利用的自体神经移植替代载体,但免疫排斥反应是导致新鲜异体神经移植失败的主要原因。为了最大限度地去除异体神经免疫原性物质,同时较完好地保存神经内部结构和细胞外基质的活性成分,将同种异体神经进行去细胞去抗原处理。在清除神经免疫原性物质的同时,能够制备出三维网管状神经结构保存较好的去细胞异体神经。
摘要
背景:
在组织相容性、免疫排斥反应及修复后瘢痕影响程度等方面,去细胞异体神经移植修复周围神经缺损更接近自体神经。目前,已经有透明质酸应用于自体周围神经修复的研究,尚无透明质酸应用于异体神经移植修复周围神经损伤的报道。
目的:探讨透明质酸在去细胞同种异体神经移植修复大鼠坐骨神经缺损中对吻合口瘢痕形成的影响。
方法:36只SD大鼠随机分为3组,每组12只。3组大鼠均选取左后肢手术,手术将坐骨神经锐性切断后造成10 mm神经缺损。实验组异体神经移植后在两端吻合口应用透明质酸,对照组行单纯异体神经移植手术,自体神经移植组将自体神经切断后远近端倒置吻合。术后观察近端吻合口的愈合情况,评估近端吻合口的瘢痕成分。
结果与结论:①大体观察:大鼠皮肤,肌肉筋膜愈合组间无差别,周围组织粘连情况比较,实验组优于对照组(P < 0.05);②Masson染色:各组神经外膜均可见胶原沉积,实验组神经外膜胶原纤维排列整齐有序,胶原纤维量略少;对照组大量胶原纤维成堆积状,排列紊乱;自体神经移植组神经外膜胶原纤维较多,胶原纤维排列较整齐,但胶原纤维较稀疏;③Ⅰ,Ⅲ型胶原免疫组化灰度值:Ⅰ型胶原灰度值实验组高于对照组(P < 0.05),Ⅲ型胶原灰度值实验组低于对照组(P < 0.05),Ⅰ型+Ⅲ型胶原灰度值实验组、对照组及自体神经移植组比较差异无显著性意义(P > 0.05);④结果提示,透明质酸在周围神经损伤修复过程中对Ⅰ,Ⅲ型胶原沉积具有调控作用,可增加Ⅲ型胶原沉积,减少Ⅰ型胶原沉积,从而减少瘢痕形成。

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程
ORCID: 0000-0002-3838-9096(张万里)

关键词: 组织构建, 组织工程, 透明质酸, 坐骨神经缺损, 去细胞异体神经, 瘢痕, Ⅰ型胶原, Ⅲ型胶原, 神经移植, 吻合口, 愈合

Abstract:

BACKGROUND: In terms of the histocompatibility, immune rejection and scar formation after repair, acellular nerve allograft is closer to autologous nerve cells. At present, hyaluronic acid has been applied for autologous peripheral nerve repair; however, research on the nerve allograft is rarely reported.
OBJECTIVE: To explore the effect of hyaluronic acid on the anastomotic scar in acellular nerve allograft repair of rat sciatic nerve defect.
METHODS: Thirty-six Sprague-Dawley rats were randomly divided into three groups (n=12 per group). The rat model of nerve defect of 10 mm was established by cutting the sciatic nerve of the left hind leg and then given nerve allograft combined with the injection of hyaluronic acid at anastomosis (experimental group), only nerve allograft (control group) and autologous nerve graft (nerve autograft group), respectively. Afterwards, the healing of the proximal anastomosis was observed and scar components were assessed.
RESULTS AND CONCLUSION: Gross observations showed that the rat skin and muscle fascia had no significant differences in healing among groups, while the surrounding tissue adhesion in the experimental group was milder than that in the control group (P < 0.05). Masson staining found that collagen deposition in the epinerium could be observed in each group. In the experimental group, a small amount of collagen fibers arranged orderly in the epineurium; in the control group numerous collagen fibers accumulated and arranged irregularly; in the nerve autograft group, sparse epineurial collagen fibers appeared in an order arrangement. The gray value of collagen type I in the experimental group was higher than that in the control group (P < 0.05), while the gray value of collagen type III was lower than that in the control group (P < 0.05). No significant differences were found in the sum gray values of collagen type I and III among groups (P > 0.05). These findings indicate that in the peripheral nerve repair, hyaluronic acid abrogates the scar formation by increasing the deposition of collagen type III and reducing the deposition of collagen type I.

中国组织工程研究杂志出版内容重点:组织构建;骨细胞;软骨细胞;细胞培养;成纤维细胞;血管内皮细胞;骨质疏松组织工程

Key words: Hyaluronic Acid, Sciatic Nerve, Cicatrix, Collagen Type I, Collagen Type III

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