摘要
背景:课题组的前期工作已证实骨髓间充质干细胞可以诱导分化为血管内皮细胞和血管平滑肌细胞,并证实所诱导的细胞和胶原包埋的聚乙醇酸支架具有良好的组织相容性。目的:探讨利用动物皮下作为生物反应器构建小口径组织工程化血管的可行性。方法:骨髓间充质干细胞诱导分化为血管平滑肌样细胞和血管内皮样细胞,分层种植于胶原包埋聚乙醇酸支架表面,然后将细胞-支架复合体种植于动物皮下,构建小口径组织工程化血管。结果与结论:人工血管组织学观察见管壁结构清晰,其大体结构和天然血管相似,可承受26.6kPa的血管腔内压力不破裂。皮下培养8周免疫荧光观察Brdu标记的部分细胞核呈现明亮的黄绿色荧光。结果说明利用动物的皮下作为生物反应器,采用静态培养的方式构建小口径组织工程化血管是可行的。
BACKGROUND： Our former studies have shown that bone marrow mesenchymal stem cells （BMMSCs） can be induced differentiation to vascular smooth muscle-like cells （VSMLCs） and vascular endothelium-like cells （VELCs）, which are compatible with collagen-embedded polyglycolic acid scaffolds. OBJECTIVE： To investigate the possibility of constructing small diameter tissue-engineered blood vessels via subcutaneous implantation. METHODS： The cells-scaffold complex was produced by separately seeding VSMLCs and VELCs derived from BMMSCs on polyglycolic acid collagen scaffolds. The two layers were separated by ECMgel. The cells-scaffold complex was subcutaneous implanted into small diameter tissue-engineered blood vessels. RESULTS AND CONCLUSION： Histological analysis of the small diameter tissue-engineered blood vessel walls revealed a typical artery structure, which was similar to natural vessels. The tissue-engineered blood vessels were not broken down under a force of 26.6 kPa. Eight weeks after implantation, the Brdu-labeled seed cells were found in the three layers of the vessel walls. The results revealed that the subcutaneous tissue was a good bioreactor to construct small diameter tissue-engineered blood
出处
《中国组织工程研究与临床康复》
CAS
CSCD
北大核心
2011年第51期9544-9548,共5页
Journal of Clinical Rehabilitative Tissue Engineering Research
基金
广西壮族自治区卫生厅立项课题(Z2007199),课题名称:骨髓间充质干细胞诱导血管平滑肌细胞和组织相容性分析
广西壮族自治区卫生厅立项课题(Z2008290),课题名称:诱导骨髓间充质干细胞向气管软骨细胞分化的实验研究~~
