【摘要】 目的 以脫細胞牛軟骨基質(acellular cartilaginous matrix,ACM)作支架體外構建組織工程軟骨,了解其作為軟骨組織工程支架的可行性。 方法 2003年1月-2005年12月聯合應用凍干-反復凍融-酶消化法對牛軟骨基質行脫細胞處理。將體外培養擴增的2~5代兔軟骨細胞接種在材料上,體外培養3周,觀察軟骨細胞在支架材料上的生長分布情況。 結果 軟骨細胞在制備的ACM上可較好地黏附生長,并且分泌大量Ⅱ型膠原和葡萄糖胺聚糖;但軟骨細胞不能長入ACM內部,只能在表層生長,少量軟骨細胞分布在ACM孔隙中。 結論 ACM支架材料具有良好的細胞相容性和活性,并且能促進軟骨細胞增殖和維持軟骨細胞表型。
【Abstract】 Objective To investigate the feasibility of applying the acellular cartilaginous matrix (ACM) as the scaffold in constructing tissue engineering cartilage in vitro. Methods We processed the bovine cartilaginous matrix by combination of lyophilization (freeze dry) and repeated freeze-thaw (12 cycles) and enzyme digestion in order to remove the cell component. The 2-5 passage chondrocytes were seeded onto the ACM, and had been cultured for 3 weeks. The cell growth, attachment and distribution were detected by histochemical stain, immunohistochemical stain, and scan electron microscope. Results The chondrocytes could adhere and grow well on the matrix surface, and synthesize plenty of glycosaminoglycanand type Ⅱ collagen. However, the chondrocytes grew only on the surface and superficial layer of the scaffold, and they did not move into the inner part of the scaffold. Conclusion ACM has good cellular compatibility without cytotoxicity and provide temporary substrate to which these anchorage-dependent cells can adhere, and stimulate the chondrocytes anchored on the scaffold to proliferate and keep differentiated phenotype.
引用本文: 高博,孔清泉,項舟,楊志明,羅靜聰,李秀群. 以脫細胞牛軟骨基質為支架體外構建組織工程軟骨的實驗研究. 華西醫學, 2010, 25(11): 2028-2031. doi: 復制