目的研究不同类型及不同浓度胶原蛋白构建的组织工程皮肤随着培养时间的增加皮肤收缩的情况。方法分别采用不同浓度牛肌腱胶原蛋白和鼠尾胶原蛋白构建组织工程皮肤,测量组织工程皮肤的收缩度,采用Wilcoxon Signed Ranks Test和Friedman ...目的研究不同类型及不同浓度胶原蛋白构建的组织工程皮肤随着培养时间的增加皮肤收缩的情况。方法分别采用不同浓度牛肌腱胶原蛋白和鼠尾胶原蛋白构建组织工程皮肤,测量组织工程皮肤的收缩度,采用Wilcoxon Signed Ranks Test和Friedman Test对结果进行分析。结果牛肌腱胶原蛋白构建的组织工程皮肤收缩度要小于鼠尾胶原蛋白构建的组织工程皮肤(P<0.01);不同浓度胶原蛋白构建的组织工程皮肤其收缩度也不相同(P<0.01)。组间比较差异有显著性(P<0.01)。结论牛肌腱胶原蛋白构建的组织工程皮肤在保持其形态稳定性上显著优于鼠尾胶原蛋白构建的组织工程皮肤。牛肌腱胶原构建的组织工程皮肤,胶原浓度越高其形态稳定性越好。展开更多
Because of the excellent biocompatibility and its specific amino sequences,collagen is an ideal biomedical material for tissue engineering applications. But collagen is usually lack of mechanical strength to form a ri...Because of the excellent biocompatibility and its specific amino sequences,collagen is an ideal biomedical material for tissue engineering applications. But collagen is usually lack of mechanical strength to form a rigid 3-D matrix and lack of ability to resist collagenase. In order to be a tissue engineering scaffold,collagen must strengthen its structures by modifying with chemical crosslinkers. Chemical crosslinkers used for modifying collagen fibers include glutaraldehyde(GA),epoxy compounds(PC) and carbodiimides (EDC). The aim of this study is to choose the best chemical crosslinker from the three reagents. In terms of the resistance to collagenase degradation,chemical cross-linking with PC provided the best protection; in terms of the mechanical characterization,chemical cross-linking with GA provided the best;and in terms of the biocompatibility,chemical cross-linking with EDC provided the best.There is not a reagent which has all merits for collagen crosslinking,so we should select the crosslinking reagent as the demands of use ask.展开更多
The aim of this study is to prepare a PVA-GAG-COL composite material by polyvinyl alcohol (PVA),glycosaminoglycan (GAG) and collagen (COL),and to investigate the feasibility of serving as a scaffold for tissue enginee...The aim of this study is to prepare a PVA-GAG-COL composite material by polyvinyl alcohol (PVA),glycosaminoglycan (GAG) and collagen (COL),and to investigate the feasibility of serving as a scaffold for tissue engineering. PVA was blended with various amounts of GAG and COL. Different proportional scaffolds could be obtained with different molecular weight and alcoholysis degree of PVA and different amounts of GAG,which exhibited high water content (60%-95%) and showed different inner configuration with swelling ratio (120%-620%). SEM proved that different composite materials had different porous structures.展开更多
文摘目的研究不同类型及不同浓度胶原蛋白构建的组织工程皮肤随着培养时间的增加皮肤收缩的情况。方法分别采用不同浓度牛肌腱胶原蛋白和鼠尾胶原蛋白构建组织工程皮肤,测量组织工程皮肤的收缩度,采用Wilcoxon Signed Ranks Test和Friedman Test对结果进行分析。结果牛肌腱胶原蛋白构建的组织工程皮肤收缩度要小于鼠尾胶原蛋白构建的组织工程皮肤(P<0.01);不同浓度胶原蛋白构建的组织工程皮肤其收缩度也不相同(P<0.01)。组间比较差异有显著性(P<0.01)。结论牛肌腱胶原蛋白构建的组织工程皮肤在保持其形态稳定性上显著优于鼠尾胶原蛋白构建的组织工程皮肤。牛肌腱胶原构建的组织工程皮肤,胶原浓度越高其形态稳定性越好。
文摘Because of the excellent biocompatibility and its specific amino sequences,collagen is an ideal biomedical material for tissue engineering applications. But collagen is usually lack of mechanical strength to form a rigid 3-D matrix and lack of ability to resist collagenase. In order to be a tissue engineering scaffold,collagen must strengthen its structures by modifying with chemical crosslinkers. Chemical crosslinkers used for modifying collagen fibers include glutaraldehyde(GA),epoxy compounds(PC) and carbodiimides (EDC). The aim of this study is to choose the best chemical crosslinker from the three reagents. In terms of the resistance to collagenase degradation,chemical cross-linking with PC provided the best protection; in terms of the mechanical characterization,chemical cross-linking with GA provided the best;and in terms of the biocompatibility,chemical cross-linking with EDC provided the best.There is not a reagent which has all merits for collagen crosslinking,so we should select the crosslinking reagent as the demands of use ask.
文摘The aim of this study is to prepare a PVA-GAG-COL composite material by polyvinyl alcohol (PVA),glycosaminoglycan (GAG) and collagen (COL),and to investigate the feasibility of serving as a scaffold for tissue engineering. PVA was blended with various amounts of GAG and COL. Different proportional scaffolds could be obtained with different molecular weight and alcoholysis degree of PVA and different amounts of GAG,which exhibited high water content (60%-95%) and showed different inner configuration with swelling ratio (120%-620%). SEM proved that different composite materials had different porous structures.
