| 刘红刚 李建忠 吴凡 汪健 张志培 闫小龙 李小飞.兔组织工程同种异体气管支架三种制备方法的比较[J].,2014,14(35):6851-6854 |
| 兔组织工程同种异体气管支架三种制备方法的比较 |
| Three Preparation Methods of the Rabbit tissue EngineeringAllogeneic Tracheal Stent |
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| DOI： |
| 中文关键词: 深低温冷冻法 玻璃化法 深低温冷冻 - 酶洗法 组织工程气管支架 细胞外基质 |
| 英文关键词: Allograft tissue engineering Detergent-enzymatic method Vitrificational method Cryopreservation-detergentenzymatic Biomechanics extra cellular matrix (SEM) |
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| 摘要点击次数: 874 |
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| 中文摘要: |
| 目的： 探讨深低温冷冻 - 酶洗法制备的气管支架在去除抗原性、维持生物力学及保护细胞外基质方面的效果。 方法： 健康新
西兰兔 24 只随机分为气管未处理作为对照 A 组， 深低温冷冻法处理 B 组， 玻璃化法处理 C 组， 深低温冷冻 - 酶洗法 D 组， 各组
样本数均为 6。 处理后将各组标本行 HE 染色后光镜观察， 戊二醛固定后电镜扫描，并测量气管最大拉伸力、破裂力和变异率等生
物力 学性能。 结果： 组织学观察显示对照 A 组有大量完整的粘膜上皮细胞； B 组和 C 组可见部分气管粘膜上皮细胞； D 组标本未
见气管粘膜上皮细胞， 且细胞核碎裂。 电镜显示 A、 B、 C、D 组气管支架可见丰富的细胞基质，未暴露胶原纤维。 组间两两比较， 气
管支架的最大拉伸力、最大破裂力和变异率均无统计学差异。 结论： 综合组织学、扫面电镜和生物力 学分析，应用 深低温冷冻 - 酶
洗法制备气管支架 D 组可以有效地去除抗原，维持生物力 学性能，并具有较完整的细胞外基质。 |
| 英文摘要: |
| Objective:Although it has been proved that detergent-enzymatic is a proper method to obtain non-immunogenic
tracheal matrices, it could not maintain allograft tissue engineering prefectly and protect biomechanics extra cellular matrix completely.
This study mainly focused on finding out the optimal method to obtaine rabbit histological engineering tracheal matrix.Methods:24 adult
rabbits were divided into 4 groups (each n=6), group A were not treated as control group,groupB was treated with the method of
cryopreservation, group C was treated with vitrificational method, group D was treated with the method of cryopreservationdetergent-enzymatic. HE dyes and scanning electron microscopy were used to observe the morphology and ultrastructure of the treated
tracheal matrices. The biomechanical properties including maximum tensile force, rupture force and aberration rate of the treated tracheal
matrices were measured.Results:There were a lot of epithelial cells in the tracheas of group A and some epithelial cells in the tracheas of
group B and group C. But the tracheas of group D could not be seen complete epithelial cells. Under scanning electron microscopy, there
were abundant extracellular matrix and collagen fiber in group A, B, C and D. Finally, no statistical differences were found in the
maximum tensile force, rupture force and aberration rate of all groups.Conclusion:The method of cryopreservationdetergent-enzymatic, by which the antigen can be removed, and extracellular matrix and biomechanical properties can be maintained
effectively, is a better way to prepare tissue engineering tracheal matrix. |
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