羊软骨细胞在生物反应器中的培养和扩增
生物反应器,,生物反应器；,微载体；,软骨细胞培养,1材料和方法,2结果,参考文献：
探索在旋转生物反应器内，应用微载体技术快速扩增分化良好的羊软骨细胞的方法。[方法]将培养的羊软骨细胞应用Cytodex3 微载体在旋转生物反应器(RCSS) 内，进行动态培养, 应用倒置显微镜对微载体表面的软骨细胞进行动态观察,并对收获的软骨细胞进行Ⅰ、Ⅱ型胶原的细胞免疫化学染色分析。[结果]关节软骨细胞于1 d内贴附于Cytodex3微载体表面,细胞初期为圆球形、半球形凸起，逐渐向周围伸展，随时间的延长，贴附于微载体的细胞逐渐增多，到培养后期,细胞密度可达最初接种的15～17倍，在微载体上收获的软骨细胞经Ⅰ型胶原的免疫细胞化学染色呈阴性,Ⅱ型胶原染色则呈强阳性。[结论]利用微载体细胞培养技术可简便快速地在体外扩增羊软骨细胞,可为构建组织工程化人工软骨提供大量活性、分化良好的软骨细胞。关键词：生物反应器； 微载体； 软骨细胞培养
A quick way in vitro for amplification of goat chondrocytes by RCSS∥ZHANG Li,GUO Quanyi,SUI Xiang, et al. Department of Orthopaedics, General Hospital of Chinese People′s Liberation Army, Beijing 100853
Abstract：[Objective]To establish a method for obtaining welldifferentiated goat chondrocytes quickly in large scale by RCSS using microcarriers technique. [Method]Articular chondrocytes were harvested from goat by sequential digestion with trypsin and collagenase , and then grown in RCSS bioreactor culture system which contained the Cytodex3 microcarriers in the culture medium (DMEM) . Growth of chondrocytes on Cytodex3 microcarriers was observed dynamically under phase contrast microscope . Immunocytochemical analysis was performed for type Ⅰcollagen and type Ⅱcollagen. [Result]The articular chondrocytes attached rapidly to the surface of Cytodex3 microcarriers. Quick growth of these cells was observed after they fully spread onto the microcarriers. The density of chondrocytes increased by 15～17 times in later stage of culture as compared with the initial density. The harvested chondrocytes had no detectable staining for collagen type Ⅰ, but stained intensively for collagen type Ⅱ. [Conclusion]Microcarrier culture of chondrocytes can yield a large quantity of goat cells within a short time ,which will be of benefit for banking cartilage cells for reconstruction of impaired cartilage by way of tissue engineering. ......
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