The growth responses of hamster chondrocytes,dermal fibroblasts and embryo cells to whole blood serum and plasma-derived serum

Summary Autoradiographic studies with³H-thymidine demonstrated that the growth responses of hamster chondrocytes, dermal fibroblasts and embryo cells, respectively, differed in media containing whole blood serum (WBS) and plasmaderived serum (PDS). Dermal fibroblasts seemed to require a growth factor from platelets for growth, but chondrocytes did not. Embryo cells showed an intermediate pattern of growth response to this factor.This work was supported by a Grant-in-Aid for Cancer Research from the Ministry of Education, Science and Culture and the Ministry of Health and Welfare of Japan.We thank Miss M. Tanaka and Miss K. Kawana for technical assistance.