Open AccessEffect of Centrifugal Force on Cellular Activity of Osteoblastic MC3T3-E1 Cells in vitro
Author(s) -
Dong Hee Lee,
Jong Chul Park,
Hwal Suh
Publication year - 2001
Publication title -
yonsei medical journal/yonsei medical journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.702
H-Index - 63
eISSN - 1976-2437
pISSN - 0513-5796
DOI - 10.3349/ymj.2001.42.4.405
Subject(s) - centrifugation , osteocalcin , alkaline phosphatase , fetal bovine serum , dna synthesis , differential centrifugation , in vitro , osteoblast , cell growth , chemistry , microcarrier , cell culture , stimulation , autocrine signalling , phosphatase , microbiology and biotechnology , biochemistry , biology , cell , enzyme , endocrinology , genetics , receptor
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.