中国组织工程研究 ›› 2016, Vol. 20 ›› Issue (25): 3738-3743.doi: 10.3969/j.issn.2095-4344.2016.25.014

• 细胞外基质材料 extracellular matrix materials • 上一篇    下一篇

制备组织工程脱细胞真皮修复皮肤溃疡创面的愈合机制

杜 鹏,关 真,王晓川   

  1. 昆明理工大学附属医院(云南省第一人民医院、昆华医院),云南省昆明市   650001
  • 收稿日期:2016-03-29 出版日期:2016-06-17 发布日期:2016-06-17
  • 作者简介:杜鹏,男,1974年生,山东省济南市人,汉族,2003年昆明医学院毕业,硕士,主治医师,主要从事皮肤性病学研究。 并列第一作者:关真,女,1973年生,陕西省西安市人,汉族,昆明理工大学生命科学与技术学院在读硕士,主要从事皮肤性病学研究。
  • 基金资助:

    云南省教育厅科学研究院基金项目(20144C004Y)

 Tissue-engineered acellular dermis repairs a skin ulcer: its preparation and healing mechanism

Du Peng, Guan Zhen, Wang Xiao-chuan   

  1. Affiliated Hospital of Kunming University of Science and Technology (First People’s Hospital of Yunnan & Kunhua Hospital), Kunming 650001, Yunnan Province, China
  • Received:2016-03-29 Online:2016-06-17 Published:2016-06-17
  • About author:Du Peng, Master, Attending physician, Affiliated Hospital of Kunming University of Science and Technology (First People’s Hospital of Yunnan & Kunhua Hospital), Kunming 650001, Yunnan Province, China Guan Zhen, Studying for master’s degree, Affiliated Hospital of Kunming University of Science and Technology (First People’s Hospital of Yunnan & Kunhua Hospital), Kunming 650001, Yunnan Province, China Du Peng and Guan Zhen contributed equally to this work.
  • Supported by:

    the Fund Project of Science Academy of Yuannan Provincial Education Commission, No. 20144C004Y

摘要:

 文章快速阅读:

 

文题释义:
脱细胞真皮基质生物材料:
采用复合酶溶液法脱表皮,用三四小时将表皮和真皮完全分离;超声技术脱细胞,两三小时将细胞破碎后去除;采用胰蛋白酶和超声联合作用修饰空间结构,增加胶原纤维间隙,提高植入后血管化速度;戊二醛溶液对细胞外基质进行交联及甘氨酸溶液中和等方法,制成的脱细胞猪真皮基质,完全去除了细胞成分,免疫原性低,生物相容性好。
创面修复:创面是正常皮肤(组织)在外界致伤因子如外科手术、外力、热、电流、化学物质、低温以及机体内在因素如局部血液供应障碍等作用下所导致的损害,常伴有皮肤完整性的破坏以及一定量正常组织的丢失,同时,皮肤的正常功能受损。创面也称为伤口或者创伤,创面修复既伤口修复。

 

摘要
背景:
近年来,人尸体脱细胞真皮在真皮缺损、软组织充填中得到应用,但是该修复材料价格昂贵,来源相对有限。
目的:分析组织工程脱细胞真皮修复皮肤溃疡创面的效果。
方法:随机对照方法将SD大鼠分为自体未脱细胞网状层真皮组和脱细胞真皮组。采用低渗溶液、2.5 g/L胰蛋白酶、体积分数0.5%TritonX-100 和PBS方法制备组织工程脱细胞真皮,建立大鼠皮肤溃疡创面模型,自体未脱细胞网状层真皮组移植自体断层皮片进行覆盖,脱细胞真皮组采用新型颗粒状组织工程脱细胞真皮进行修复,比较两组修复效果及对皮肤溃疡创面愈合的机制。
结果和结论:①获得的组织工程脱细胞真皮为白色状,常温下大体观察呈颗粒状;②苏木精-伊红染色显示组织工程脱细胞真皮内部呈现出“树枝状”分布,并且胶原纤维束的间隙相对较大;③脱细胞真皮组植皮后2,3,4,8周创面移植皮肤成活率,显著高于自体未脱细胞网状层真皮组(P < 0.05);④脱细胞真皮组大鼠植皮后3,4,8周创面收缩率显著高于自体未脱细胞网状层真皮组(P < 0.05);⑤脱细胞真皮组创周正常皮肤胶原纤维束平均直径及间隙率显著高于自体未脱细胞网状层真皮组(P < 0.05)。⑥结果提示:组织工程脱细胞真皮制备方法相对简单,制备条件温和,且制备的组织工程脱细胞真皮形态规则,修复皮肤溃疡创面效果理想,能降低真皮内DNA残留量,能显著改善体内某些生物力学特性,促进创面愈合。

 

ORCID: 0000-0001-5608-9997(杜鹏)

关键词: 组织构建, 材料相容性, 脱细胞真皮, 制备方法, 皮肤溃疡创面, 间隙率, 胶原纤维束, 生物力学特性

Abstract:

BACKGROUND: In recent years, acellular human cadaveric dermis has been applied for repairing dermal defects and filling soft tissues, but this repair material is expensive and difficult to obtain.

 

OBJECTIVE: To explore the repair effect of tissue-engineered acellular dermis on wound healing of skin ulcer.

 

METHODS: Sprague-Dawley rats were randomly divided into autologous reticular dermis and 2.5 g/L trypsin, 0.5% Triton X-100 and PBS solution, and in the meanwhile, a rat model of skin ulcer was established. Then, autologous skin graft and tissue-engineered acellular dermis were transplanted into the autologous reticular dermis group and acellular dermal group, respectively. Subsequently, comparative study about the repair effect and relative mechanism between two groups was performed.

 

RESULTS AND CONCLUSION: The tissue-engineered acellular dermis showed a white and grainy shape at room temperature. And hematoxylin-eosin staining showed that: the internal structure of tissue- engineered acellular dermis exhibited a dendritic distribution, and the gap between collagen fiber bundles was relatively large. At 2, 3, 4 and 8 weeks after dermal transplantation, the survival rate of skin graft in the acellular dermis group was significantly higher than that in the autologous reticular dermis group (P < 0.05). And the wound contraction rate in the acellular dermis group was significantly higher than that of the autologous reticular dermis group at 3, 4 and 8 weeks after dermal transplantation (P < 0.05). In addition, the average diameter and clearance rate of collagen fibers in the normal skin around wound in the acellular dermis group were significantly higher than those of autologous reticular dermis group (P < 0.05). To conclude, it is relatively simple to prepare tissue-engineered acellular dermis under mild conditions, and the prepared tissue-engineered acellular dermis presents a regular shape. Moreover, this acellular dermis achieves desired outcomes in repairing dermal defects, which can promote wound healing by reducing the intradermal DNA residual and significantly improving some biomechanical properties in vivo.

 

 

 

 

Key words: Burns, Skin, Ulcer, Tissue Engineering

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