摘要
目的 制备脱细胞人羊膜 (HAAM) ,检测其细胞相容性和组织相容性 ,探讨其作为组织工程支架材料的可行性。 方法 新鲜人羊膜经漂洗后戊二醛交联 ,0 .5 % SDS震摇 2 4小时 ,胰蛋白酶消化 4小时 ,充分漂洗 ,冷冻干燥 ,分装 ,环氧乙烷消毒备用。倒置相差显微镜和扫描电镜观察表面结构 ,测量孔径 ,并作 HE、Mallory染色。体外培养人成纤维细胞并复合于 HAAM,倒置相差显微镜和扫描电镜观察细胞的黏附、生长 ,四甲基偶氮唑盐 (MTT)法测定 HAAM浸提液对培养的人成纤维细胞的细胞毒性。将 HAAM植入 SD大鼠背部皮下 ,观察其组织相容性。 结果 HAAM的一面为网状结构 ,孔径为 10～ 80 nm,另一面为致密纤维结构。HE、Mallory染色表明材料无细胞残留 ,均为胶原组成。成纤维细胞能在 HAAM上黏附、增殖。 MTT示材料细胞毒性为 0或 1级 ,动物埋置实验无异常反应。 结论 应用去垢剂 -酶消化法处理新鲜人羊膜 ,能有效去除组织中的细胞和可溶性成分 ,可进一步降低其免疫原性 ,保留基质及网状结构 ,有良好的细胞相容性和组织相容性 ,可作为组织缺损的修复材料及组织工程的膜支架材料。
Objective To prepare human acellular amniotic membrane(HAAM) and to measure its cytocompatibility and biocompatibility. Methods HAAM were prepared by chemical detergent-enzymatic extraction. Fresh human amnion was crosslinked with glutaradehyde, shaken in 0.5% SDS for 24 hours, and then treated with 0.25% trypsin for 4 hours. The production were freeze-drying and sterilized using ethylene oxide. Human fibroblasts were isolated from embryo and expanded in vitro. The fibroblasts were seeded in HAAM. HAAM and specimen were stained with HE and Mallory, and observed grossly, under light microscopy and scanning electron microscopy. The HAAM were implanted in the back of SD rats. Results There were no residues of cells in the HAAM (HE, Mallory staining). One side of HAAM had reticular and porous structure, the other side had compact fibrous structure. Pore size was from 10 to 80 nm. The HAAM could be seeded with expanded fibroblasts in vitro, and fibroblasts had the potential of spread and proliferation. The SD rat in the implant test had no death, convulsions and other abnormal response. Conclusion The detergent-enzymatic extraction process can remove cells and solvable components effectively and preserve the tissue matrix well and keep the reticular structure. The HAAM can be used as an ideal scaffold of biological membrane for tissue engineering.
出处
《中国修复重建外科杂志》
CAS
CSCD
2004年第2期108-111,共4页
Chinese Journal of Reparative and Reconstructive Surgery
基金
国家高技术研究发展计划 (863)资助项目(2 0 0 1 AA2 1 60 1 1 )~~
