INFLUENCE OF MATRICIAL MOLECULES ON GROWTH AND DIFFERENTIATION OF ENTRAPPED CHONDROCYTES

被引:35
作者
RAMDI, H [1 ]
LEGAY, C [1 ]
LIEVREMONT, M [1 ]
机构
[1] ECOLE NORMALE SUPER,INTERDISCIPLINAIRE RECH BIOL APPL LAB,61 AVE PRESIDENT WILSON,F-94235 CACHAN,FRANCE
关键词
D O I
10.1006/excr.1993.1214
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Primary cultures of rabbit articular chondrocytes have been cultivated normally and within three-dimensional systems using different alginate matrices. The in vitro proliferation capacity of the cells immobilized in the calcium alginate beads was investigated. The growth curve showed that chondrocytes are able to grow and to divide for several days inside the beads; in parallel an increase in protein contents was also measured. The differentiated phenotype of rabbit articular chondrocytes consists of cartilage-specific proteoglycans. During serial monolayer cultures this phenotype was lost and replaced by a low level of proteoglycan synthesis. On the contrary when cultivated in beads, entrapped cells maintained their differentiated phenotype over time; the rates of proteoglycan were similar to those of primary chondrocytes. All these parameters were tested comparatively using different substrata in monolayer cultures and in alginate gels. Assays were carried out to assess the influence of type I collagen, type IV collagen, and of fibronectine on the growth as well as on the differentiation phenotype. The encapsulation methodology is readily applicable to the culture of chondrocytes in single beads, in multiwell dishes, or to mass culture for a bioproduction of extracellular matrix components. © 1993 Academic Press, Inc.
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页码:449 / 454
页数:6
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