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Effect of Centrifugal Force on Cellular Activity of Osteoblastic MC3T3-E1 Cells in vitro
Yonsei Medical Journal ; : 405-410, 2001.
Article in English | WPRIM | ID: wpr-36127
ABSTRACT
The effects of centrifugal force on growth and differentiation of osteoblastic cells cultured in alpha-MEM containing 1% Fetal bovine serum were investigated by assays of DNA synthesis, alkaline phosphatase activity and osteocalcin- production in osteoblastic MC3T3-E1 cells. Centrifugation of the cells in low concentrations (1%) of fetal bovine serum caused a 1.9-fold increase of [3H] thymidine incorporation on day 3 from the start of centrifugation, and gradually decreased with culture up to day 9. Alkaline phosphatase activity was not affected by centrifugal force until day 5, and increased rapidly after day 7. Stimulation of DNA synthesis by centrifugation was abolished in the presence of H-7, an inhibitor of protein kinase C. These results suggest that centrifugal force stimulates the proliferation of osteoblastic cells through an autocrine secretion of some diffusable growth- promoting activity. Additional centrifugation of the cells also slightly stimulated alkaline phosphatase activity, although this did not directly influence the cell's osteocalcin-production activity.
Subject(s)
Full text: Available Index: WPRIM (Western Pacific) Main subject: Osteoblasts / Stress, Mechanical / DNA / Cell Division / Cells, Cultured / Centrifugation / Alkaline Phosphatase / Animals Limits: Animals Language: English Journal: Yonsei Medical Journal Year: 2001 Type: Article

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Full text: Available Index: WPRIM (Western Pacific) Main subject: Osteoblasts / Stress, Mechanical / DNA / Cell Division / Cells, Cultured / Centrifugation / Alkaline Phosphatase / Animals Limits: Animals Language: English Journal: Yonsei Medical Journal Year: 2001 Type: Article