Effects of Low Oxygen Tension during Expansion on Chondrogenic Potential of Osteoarthritic Chondrocytes
文献类型: 会议论文
第一作者: Kevin A. Davis
作者: Kevin A. Davis 1 ; James H. Henderson 1 ; Jing Wang 1 ;
作者机构: 1.Department of Biomedical and Chemical Engineering Syracuse Biomaterials Institute Syracuse University Syracuse, New York, USA
关键词: OA chondrocytes;low oxygen tension;dedifferentiation
会议名称: Annual Northeast Bioengineering Conference
主办单位:
页码: 84-85
摘要: Primary human chondrocytes, although a promising cell source for cartilage tissue engineering, tend to dedifferentiate and lose their characteristic gene expression and protein production during monolayer, expansion. Low O_2 tension in vitro culture has been studied to examine its effect on preventing dedifferentiation, and results have been conflicting. In particular, low O_2 expansion effects on human osteoarthritis (OA) chondrocytes are poorly understood. In this study, we expanded chondrocytes collected from patients with osteoarthritis (OA) under normal (21%) and low (5%) O_2 tension then continued with micromass culture under 21% O_2 for 3 weeks. Our results suggest that low O_2 condition may promote chondrogenic characteristic gene expression in monolayer cells. But improved ECM production, which was seen earlier in animal models, may not be relevant to human OA chondrocytes. Further examination of the mechanical properties of the engineered pellets is needed to confirm the effects of low O_2 expansion on human OA chondrocytes and their use in cartilage tissue engineering.
分类号: q81-53
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