中国组织工程研究 ›› 2013, Vol. 17 ›› Issue (16): 2950-2955.doi: 10.3969/j.issn.2095-4344.2013.16.014

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

灌注法构建小肠黏膜全层去细胞外基质

侯 楠,朱 力,文 科   

  1. 成都医学院第一附属医院耳鼻咽喉科,四川省成都市 610500
  • 收稿日期:2012-07-24 修回日期:2012-09-03 出版日期:2013-04-16 发布日期:2013-04-16
  • 作者简介:侯楠★,女,1983年生,四川省南充市人,汉族,2009 年解放军第四军医大学毕业,硕士,主治医师,从事组织工程喉及气管重建研究。110565888@qq.com
  • 基金资助:

    四川省教育厅自助项目(09ZC033)。

Reconstructing the perfused-decellularized full-thickness small intestine extracellular matrix

Hou Nan, Zhu Li, Wen Ke   

  1. Department of Otorhinolaryngology Head and Neck Surgery, First Affiliated Hospital, Chengdu Medical College, Chengdu 610500, Sichuan Province, China
  • Received:2012-07-24 Revised:2012-09-03 Online:2013-04-16 Published:2013-04-16
  • About author:Hou Nan★, Master, Attending physician, Department of Otorhinolaryngology Head and Neck Surgery, First Affiliated Hospital, Chengdu Medical College, Chengdu 610500,Sichuan Province, China 110565888@qq.com
  • Supported by:

    the Educational Bureau of Sichuan Province, No. 09ZC033*

摘要:

背景:对于解剖层次复杂的细胞外基质,单纯浸泡法则很难达到理想的去细胞效果。
目的:观察灌注法去细胞技术制备小肠黏膜全层去细胞外基质的效果。
方法:采用灌注法去细胞技术,经成年雄性新西兰大白兔小肠黏膜上动脉灌注去离子剂后处理获得小肠
黏膜全层去细胞外基质。采用MTT法检测小肠黏膜全层去细胞外基质浸提液(实验组)或含体积分数20%
小牛血清的DMEM(对照组)与1 月龄新西兰大白兔骨髓间充质干细胞共培养后的细胞相对增殖率。
结果与结论:①大体观察:小肠黏膜上动脉经灌注30 min 后变得苍白透明,经2 h 灌注后肠段变得苍
白剔透,清楚可见脉管纹理。②组织学与扫描电镜观察:灌注法构建的小肠黏膜全层去细胞外基质的去
细胞程度均匀,胶原纤维未受损,孔隙多,孔隙率为(86.72±2.98)%。③MTT 检测实验:培养2,4,7 d,
实验组细胞A 值明显高于对照组细胞A值(P < 0.05),且实验组细胞相对增殖率均>1。表明采用灌注法
构建小肠黏膜全层去细胞外基质可操作性强,安全性好,且小肠黏膜全层去细胞外基质对骨髓间充质干
细胞无毒性,并有一定的促生长作用。

关键词: 生物材料, 细胞外基质材料, 灌注法, 去细胞技术, 小肠, 黏膜, 细胞外基质, 喉气管, 骨髓间充质干
细胞,
细胞相对增殖率, 省级基金

Abstract:

BACKGROUND: Immersing method is difficult to construct the ideal acellular matrix for the complex organ.
OBJECTIVE: To investigate the effect of preparing the acellular full-thickness small intestine scaffold by
perfusion method.
METHODS: All the small intestines were excised in a sterile fashion in adult male New Zealand rabbits and
the acellular small intestine scaffolds were obtained by perfusing ionic detergents through the superior
mesenteric arteries. Relative growth rates were detected using 3-(4,5-dimethylthiazol-2-yl)-2,5-
diphenyltetrazolium bromide method after bone marrow mesenchymal stem cells from 1-month-old NewZealand rabbits were co-cultured with decellularized full-thickness small intestine extracellular matrix
(experimental group) or Dulbecco’s modified Eagle’s medium containing 20% fetal bovine serum (control group).
RESULTS AND CONCLUSION: The macroscopic view showed that the perfused-decellularized small intestine
artery became translucent after 30 minutes of perfusion, and the small intestine segment became translucent
after 2 hours of perfusion. The vessels were seen distinctly. Histological view and scanning electron microscope
results indicated that the perfused-decellularized full-thickness small intestine showed perfect acellular effect.
Many pores and collagen fibers were retained and the porosity was (86.72±2.98)%. 3-(4,5-Dimethylthiazol-2-yl)-
2,5-diphenyltetrazolium bromide assay showed that the relative growth rate of the experimental group overtopped
1. The absorbance values in the experimental group were significantly higher than those in the control group at 2,
4 and 7 days of coculture (P < 0.05). These findings suggest that the perfusion method is a better way to
construct acellular full-thickness small intestine scaffold because it can achieve better acellular effect and retain
scaffold vitality at the greatest extent in the acellular small intestine scaffold that can promote the growth of bone
marrow mesenchymal stem cells and not add toxicity to the cells.

Key words: biomaterials, extracellular matrix materials, perfusion method, decellularized technique, small
intestine,
mucous membrane, extracellular matrix, laryngotracheal, bone marrow mesenchymal stem cells;
relative growth rate,
provincial grants-supported paper

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